diff --git a/frappe/public/build.json b/frappe/public/build.json
index fb7be5f5ab..ecddea6e32 100755
--- a/frappe/public/build.json
+++ b/frappe/public/build.json
@@ -41,6 +41,7 @@
 	"css/desk.min.css": [
 		"public/js/lib/datepicker/datepicker.min.css",
 		"public/js/lib/awesomplete/awesomplete.css",
+		"public/js/lib/summernote/summernote.css",
 		"public/css/bootstrap.css",
 		"public/css/font-awesome.css",
 		"public/css/octicons/octicons.css",
@@ -66,6 +67,7 @@
 		"public/js/lib/awesomplete/awesomplete.min.js",
 		"public/js/lib/Sortable.min.js",
 		"public/js/lib/taggle/taggle.min.js",
+		"public/js/lib/summernote/summernote.js",
 		"public/js/lib/notify.js",
 		"public/js/lib/bootstrap.min.js",
 		"public/js/lib/moment/moment-with-locales.min.js",
diff --git a/frappe/public/css/desk.css b/frappe/public/css/desk.css
index 647e167b97..187778c30d 100644
--- a/frappe/public/css/desk.css
+++ b/frappe/public/css/desk.css
@@ -642,3 +642,23 @@ fieldset[disabled] .form-control {
 .search-result {
   margin-bottom: 24px;
 }
+.note-editor {
+  margin-top: 5px;
+}
+.note-editor.note-frame {
+  border-color: #d1d8dd;
+}
+.note-editor .btn {
+  outline: none !important;
+}
+.note-editor .dropdown-style > li > a > * {
+  margin: 0;
+}
+.note-editor .fa.fa-check {
+  color: #36414C !important;
+}
+.note-editor .dropdown-menu {
+  z-index: 100;
+  max-height: 300px;
+  overflow: scroll;
+}
diff --git a/frappe/public/js/frappe/form/control.js b/frappe/public/js/frappe/form/control.js
index 817c72b661..6586a0ab91 100644
--- a/frappe/public/js/frappe/form/control.js
+++ b/frappe/public/js/frappe/form/control.js
@@ -1555,130 +1555,111 @@ frappe.ui.form.ControlCode = frappe.ui.form.ControlText.extend({
 });
 
 frappe.ui.form.ControlTextEditor = frappe.ui.form.ControlCode.extend({
-	editor_name: "bsEditor",
-	horizontal: false,
 	make_input: function() {
-		//$(this.input_area).css({"min-height":"360px"});
 		this.has_input = true;
-		this.make_rich_text_editor();
-		this.make_markdown_editor();
-		this.make_switcher();
+		this.make_editor();
+		this.hide_elements_on_mobile();
 	},
-	make_rich_text_editor: function() {
+	make_editor: function() {
 		var me = this;
-		this.editor_wrapper = $("<div>").appendTo(this.input_area);
-		var onchange = function(value) {
-			me.md_editor.val(value);
-			me.parse_validate_and_set_in_model(value);
-		}
-		this.editor = new (frappe.provide(this.editor_name))({
-			parent: this.editor_wrapper,
-			change: onchange,
-			field: this
-		});
-		this.editor.editor.on("blur", function() {
-			onchange(me.editor.clean_html());
-		});
-		this.editor.editor.keypress("ctrl+s meta+s", function() {
-			me.frm.save_or_update();
-		});
-	},
-	make_markdown_editor: function() {
-		var me = this;
-		this.md_editor_wrapper = $("<div class='hide'>")
-			.appendTo(this.input_area);
-		this.md_editor = $("<textarea class='form-control markdown-text-editor'>")
-		.appendTo(this.md_editor_wrapper)
-		.allowTabs()
-		.on("change", function() {
-			var value = $(this).val();
-			me.editor.set_input(value);
-			me.parse_validate_and_set_in_model(value);
+		this.editor = $("<div>").appendTo(this.input_area);
+		this.editor.summernote({
+			minHeight: 400,
+			toolbar: [
+				['magic', ['style']],
+				['style', ['bold', 'italic', 'underline', 'clear']],
+				['fontsize', ['fontsize']],
+				['color', ['color']],
+				['para', ['ul', 'ol', 'paragraph']],
+				['height', ['height']],
+				['misc', ['fullscreen', 'codeview']]
+			],
+			callbacks: {
+				onChange: function(value) {
+					me.parse_validate_and_set_in_model(value);
+				},
+				onKeydown: function(e) {
+					var key = frappe.ui.keys.get_key(e);
+					// prevent 'New DocType (Ctrl + B)' shortcut in editor
+					if(['ctrl+b', 'meta+b'].indexOf(key) !== -1) {
+						e.stopPropagation();
+					}
+					if(key.indexOf('escape') !== -1) {
+						if(me.note_editor.hasClass('fullscreen')) {
+							// exit fullscreen on escape key
+							me.note_editor
+								.find('.note-btn.btn-fullscreen')
+								.trigger('click');
+						}
+					}
+				}
+			},
+			icons: {
+				'align': 'fa fa-align',
+				'alignCenter': 'fa fa-align-center',
+				'alignJustify': 'fa fa-align-justify',
+				'alignLeft': 'fa fa-align-left',
+				'alignRight': 'fa fa-align-right',
+				'indent': 'fa fa-indent',
+				'outdent': 'fa fa-outdent',
+				'arrowsAlt': 'fa fa-arrows-alt',
+				'bold': 'fa fa-bold',
+				'caret': 'caret',
+				'circle': 'fa fa-circle',
+				'close': 'fa fa-close',
+				'code': 'fa fa-code',
+				'eraser': 'fa fa-eraser',
+				'font': 'fa fa-font',
+				'frame': 'fa fa-frame',
+				'italic': 'fa fa-italic',
+				'link': 'fa fa-link',
+				'unlink': 'fa fa-chain-broken',
+				'magic': 'fa fa-magic',
+				'menuCheck': 'fa fa-check',
+				'minus': 'fa fa-minus',
+				'orderedlist': 'fa fa-list-ol',
+				'pencil': 'fa fa-pencil',
+				'picture': 'fa fa-picture',
+				'question': 'fa fa-question',
+				'redo': 'fa fa-redo',
+				'square': 'fa fa-square',
+				'strikethrough': 'fa fa-strikethrough',
+				'subscript': 'fa fa-subscript',
+				'superscript': 'fa fa-superscript',
+				'table': 'fa fa-table',
+				'textHeight': 'fa fa-text-height',
+				'trash': 'fa fa-trash',
+				'underline': 'fa fa-underline',
+				'undo': 'fa fa-undo',
+				'unorderedlist': 'fa fa-list-ul',
+				'video': 'fa fa-video'
+			}
 		});
-
-		$('<div class="text-muted small">Add &lt;!-- markdown --&gt; \
-			to always interpret as markdown</div>')
-			.appendTo(this.md_editor_wrapper);
+		this.note_editor = $(this.input_area).find('.note-editor');
 	},
-	make_switcher: function() {
-		var me = this;
-		this.current_editor = this.editor;
-		this.switcher = $('<p class="text-right small">\
-			<a href="#" class="switcher"></a></p>')
-			.appendTo(this.input_area)
-			.find("a")
-			.click(function() {
-				me.switch();
-				return false;
-			});
-		this.render_switcher();
-	},
-	switch: function() {
-		if(this.current_editor===this.editor) {
-			// switch to md
-			var value = this.editor.get_value();
-			this.editor_wrapper.addClass("hide");
-			this.md_editor_wrapper.removeClass("hide");
-			this.current_editor = this.md_editor;
-			this.add_type_marker("markdown");
-		} else {
-			// switch to html
-			var value = this.md_editor.val();
-			this.md_editor_wrapper.addClass("hide");
-			this.editor_wrapper.removeClass("hide");
-			this.current_editor = this.editor;
-			this.add_type_marker("html");
-		}
-		this.render_switcher();
-	},
-	add_type_marker: function(marker) {
-		var opp_marker = marker==="html" ? "markdown" : "html";
-		if(!this.value) this.value = "";
-		if(this.value.indexOf("<!-- " + opp_marker + " -->")!==-1) {
-			// replace opposite marker
-			this.set_value(this.value.split("<!-- " + opp_marker + " -->").join("<!-- " + marker + " -->"));
-		} else if(this.value.indexOf("<!-- " + marker + " -->")===-1) {
-			// add marker (marker missing)
-			this.set_value(this.value + "\n\n\n<!-- " + marker + " -->");
-		}
-	},
-	render_switcher: function() {
-		this.switcher.html(__("Edit as {0}", [this.current_editor == this.editor ?
-			__("Markdown") : __("Rich Text")]));
+	hide_elements_on_mobile: function() {
+		this.note_editor.find('.note-btn-underline,\
+			.note-btn-italic, .note-fontsize,\
+			.note-color, .note-height, .btn-codeview')
+			.addClass('hidden-xs');
+		if($('.toggle-sidebar').is(':visible')) {
+			// disable tooltips on mobile
+			this.note_editor.find('.note-btn')
+				.attr('data-original-title', '');
+		}
 	},
 	get_value: function() {
-		return this.current_editor === this.editor
-			? this.editor.get_value()
-			: this.md_editor.val();
+		return this.editor.summernote('code');
 	},
 	set_input: function(value) {
-		this._set_input(value);
-
-		// guess editor type
-		var is_markdown = false;
-		if(value) {
-			if(value.indexOf("<!-- markdown -->") !== -1) {
-				var is_markdown = true;
-			}
-			if((is_markdown && this.current_editor===this.editor)
-				|| (!is_markdown && this.current_editor===this.md_editor)) {
-				this.switch();
-			}
-		}
-	},
-	_set_input: function(value) {
 		if(value == null) value = "";
 		value = frappe.dom.remove_script_and_style(value);
-		this.editor.set_input(value);
-		this.md_editor.val(value);
+		if(value !== this.get_value())
+			this.editor.summernote('code', value);
 		this.last_value = value;
 	},
 	set_focus: function() {
-		var editor = this.$wrapper.find('.text-editor');
-		if(editor) {
-			editor.focus();
-			return true;
-		}
+		return this.editor.summernote('focus');
 	}
 });
 
diff --git a/frappe/public/js/frappe/ui/editor.html b/frappe/public/js/frappe/ui/editor.html
deleted file mode 100644
index a651279f87..0000000000
--- a/frappe/public/js/frappe/ui/editor.html
+++ /dev/null
@@ -1,84 +0,0 @@
-<div class="frappe-list-toolbar frappe-ignore-click">
-    <div class="btn-toolbar" data-role="editor-toolbar"
-        style="margin-bottom: 7px;">
-		<div class="btn-group form-group editor-toolbar-list-group">
-			<a class="btn btn-default btn-small" data-edit="bold"
-                title="{{ __("Bold (Ctrl/Cmd+B)") }}"><b>B</b></a>
-			<a class="btn btn-default btn-small"
-                data-edit="insertunorderedlist" title="{{ __("Bullet list") }}">
-				<i class="octicon octicon-list-unordered"></i></a>
-			<a class="btn btn-default btn-small"
-                data-edit="insertorderedlist"
-                title="{{ __("Number list") }}">
-				<i class="octicon octicon-list-ordered"></i></a>
-		</div>
-		<div class="btn-group form-group editor-toolbar-text-group">
-			<a class="btn btn-default btn-small dropdown-toggle"
-                 data-toggle="dropdown" title="{{ __("Font Size") }}">
-                 <i class="fa fa-text-height"></i>
-                 <small style="margin-left: 5px;" class="hidden-xs"></small>
-                <b class="caret"></b>
-            </a>
-			<ul class="dropdown-menu" role="menu">
-                <li><a href="#" data-edit="formatBlock &lt;p&gt;">
-                    <p>{{ __("Paragraph") }}</p></a>
-                </li>
-				<li><a href="#" data-edit="formatBlock &lt;h1&gt;">
-                    <h1>{{ __("Heading") }} 1</h1></a>
-                </li>
-                <li><a href="#" data-edit="formatBlock &lt;h2&gt;">
-                    <h2>{{ __("Heading") }} 2</h2></a>
-                </li>
-				<li><a href="#" data-edit="formatBlock &lt;h3&gt;">
-                    <h3>{{ __("Heading") }} 3</h3></a>
-                </li>
-				<li><a href="#" data-edit="formatBlock &lt;h4&gt;">
-                    <h4>{{ __("Heading") }} 4</h4></a>
-                </li>
-				<li><a href="#" data-edit="formatBlock &lt;h5&gt;">
-                    <h5>{{ __("Heading") }} 5</h5></a>
-                </li>
-			</ul>
-		</div>
-        <div class="btn-group form-group editor-toolbar-link-group">
-            <a class="btn btn-default btn-small btn-insert-img"
-                title="{{ __("Insert picture (or just drag & drop)") }}">
-				<i class="octicon octicon-file-media"></i></a>
-			<a class="btn btn-default btn-small btn-add-link"
-                title="{{ __("Insert Link") }}"><i class="fa fa-link"></i></a>
-			<a class="btn btn-default btn-small"
-                title="{{ __("Remove Link") }}" data-edit="unlink">
-                <i class="fa fa-unlink"></i></a>
-		</div>
-		<div class="btn-group hidden-xs form-group editor-toolbar-align-group">
-			<a class="btn btn-default btn-small" data-edit="justifyleft"
-                title="{{ __("Align Left (Ctrl/Cmd+L)") }}">
-                <i class="fa fa-align-left"></i></a>
-            <a class="btn btn-default btn-small" data-edit="justifycenter"
-                title="{{ __("Center (Ctrl/Cmd+E)") }}">
-				<i class="fa fa-align-center"></i></a>
-            <a class="btn btn-default btn-small" data-edit="justifyright"
-                title="{{ __("Align Right (Ctrl/Cmd+R)") }}">
-                <i class="fa fa-align-right"></i></a>
-			<a class="btn btn-default btn-small" data-edit="outdent"
-                title="{{ __("Reduce indent (Shift+Tab)") }}">
-				<i class="fa fa-indent"></i></a>
-			<a class="btn btn-default btn-small" data-edit="indent"
-                title="{{ __("Indent (Tab)") }}">
-                <i class="fa fa-outdent"></i></a>
-            <a class="btn btn-default btn-small"
-                data-edit="insertHorizontalRule"
-                title="{{ __("Horizontal Line Break") }}">
-                <i class="octicon octicon-horizontal-rule"></i></a>
-		</div>
-		<div class="btn-group form-group editor-toolbar-code-group">
-			<a class="btn btn-default btn-small btn-html hidden-xs"
-                title="{{ __("HTML") }}">
-				<i class="octicon octicon-code"></i></a>
-			<a class="btn btn-default btn-small btn-success" data-action="Save"
-                title="{{ __("Save") }}">
-				<i class="octicon octicon-check"></i></a>
-		</div>
-		<input type="file" data-edit="insertImage" />
-	</div>
-</div>
diff --git a/frappe/public/js/frappe/ui/editor.js b/frappe/public/js/frappe/ui/editor.js
deleted file mode 100644
index f3ad996779..0000000000
--- a/frappe/public/js/frappe/ui/editor.js
+++ /dev/null
@@ -1,471 +0,0 @@
-// Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
-// MIT License. See license.txt
-
-/* Inspired from: http://github.com/mindmup/bootstrap-wysiwyg */
-
-// todo
-// make it inline friendly
-
-bsEditor = Class.extend({
-	init: function(options) {
-		this.options = $.extend({}, this.default_options, options || {});
-		this.edit_mode = true;
-		if(this.options.editor) {
-			this.setup_editor(this.options.editor);
-			this.setup_fixed_toolbar();
-		} else if(this.options.parent) {
-			this.wrapper = $("<div></div>").appendTo(this.options.parent);
-			this.setup_editor($("<div class='frappe-list'></div>").appendTo(this.wrapper));
-			this.setup_inline_toolbar();
-			this.editor.addClass("text-editor");
-			this.set_editing();
-		}
-	},
-	setup_editor: function(editor) {
-		var me = this;
-		this.editor = $(editor);
-		this.editor.on("click", function() {
-			if(me.edit_mode && !me.editing) {
-				me.set_editing();
-			}
-		}).on("mouseup keyup mouseout", function() {
-			var html = me.clean_html();
-			if(me.editing) {
-				me.toolbar.save_selection();
-				me.toolbar.update();
-				if(html != me.last_html) {
-					me.options.change && me.options.change(html);
-					me.last_html = html;
-				}
-			}
-		}).data("object", this);
-
-		this.bind_hotkeys();
-		this.init_file_drops();
-	},
-
-	set_editing: function() {
-		this.editor.attr('contenteditable', true);
-		this.toolbar.show();
-		if(this.options.editor)
-			this.toolbar.editor = this.editor.focus();
-		this.editing = true;
-	},
-
-	setup_fixed_toolbar: function() {
-		if(!window.bs_editor_toolbar) {
-			window.bs_editor_toolbar = new bsEditorToolbar(this.options)
-		}
-		this.toolbar = window.bs_editor_toolbar;
-	},
-	setup_inline_toolbar: function() {
-		this.toolbar = new bsEditorToolbar(this.options, this.wrapper, this.editor);
-	},
-	onhide: function() {
-		this.editing = false;
-		this.options.onsave && this.options.onsave(this);
-		this.options.change && this.options.change(this.get_value());
-	},
-	toggle_edit_mode: function(bool) {
-		// switch to enter editing mode
-		this.edit_mode = bool;
-		if(this.edit_mode) {
-			this.editor.trigger("click");
-		}
-	},
-	default_options: {
-		hotKeys: {
-			'ctrl+b meta+b': 'bold',
-			'ctrl+i meta+i': 'italic',
-			'ctrl+u meta+u': 'underline',
-			'ctrl+z meta+z': 'undo',
-			'ctrl+y meta+y meta+shift+z': 'redo',
-			'ctrl+l meta+l': 'justifyleft',
-			'ctrl+e meta+e': 'justifycenter',
-			'ctrl+j meta+j': 'justifyfull',
-			'shift+tab': 'outdent',
-			'tab': 'indent'
-	    },
-		toolbar_selector: '[data-role=editor-toolbar]',
-		command_role: 'edit',
-		selection_marker: 'edit-focus-marker',
-		selection_color: 'darkgrey',
-		remove_typography: false,
-		max_file_size: 5,
-	},
-
-	bind_hotkeys: function () {
-		var me = this;
-		$.each(this.options.hotKeys, function (hotkey, command) {
-			me.editor.keydown(hotkey, function (e) {
-				if (me.editor.attr('contenteditable') && me.editor.is(':visible')) {
-					e.preventDefault();
-					e.stopPropagation();
-					me.toolbar.execCommand(command);
-					return false;
-				}
-			}).keyup(hotkey, function (e) {
-				if (me.editor.attr('contenteditable') && me.editor.is(':visible')) {
-					e.preventDefault();
-					e.stopPropagation();
-					return false;
-				}
-			});
-		});
-	},
-
-	clean_html: function() {
-
-		var html = this.editor.html() || "";
-
-		if(!$.trim(this.editor.text()) && !(this.editor.find("img"))) html = "";
-
-		// remove custom typography (use CSS!)
-		if(this.options.remove_typography) {
-			var tmp = $("<div></div>").html(html);
-			// remove style attributes
-			tmp.find("*")
-				.removeAttr("style")
-				.removeAttr("font");
-			html = tmp.html();
-		}
-
-		return html;
-	},
-
-	init_file_drops: function () {
-		var me = this;
-		this.editor.on('dragenter dragover', false)
-			.on('drop', function (e) {
-				var dataTransfer = e.originalEvent.dataTransfer;
-				e.stopPropagation();
-				e.preventDefault();
-				if (dataTransfer && dataTransfer.files && dataTransfer.files.length > 0) {
-					me.insert_files(dataTransfer.files);
-				}
-			});
-	},
-
-	insert_files: function (files) {
-		var me = this;
-		this.editor.focus();
-		$.each(files, function (i, file) {
-			if (/^image\//.test(file.type)) {
-				me.get_image(file, function(image_url) {
-					me.toolbar.execCommand('insertImage', image_url);
-				})
-			}
-		});
-	},
-
-	get_image: function (fileobj, callback) {
-		var freader = new FileReader(),
-			me = this;
-
-		freader.onload = function() {
-			var dataurl = freader.result;
-			// add filename to dataurl
-			var parts = dataurl.split(",");
-			parts[0] += ";filename=" + fileobj.name;
-			dataurl = parts[0] + ',' + parts[1];
-			if(me.options.max_file_size) {
-				if(dataurl.length > (me.options.max_file_size * 1024 * 1024 * 1.4)) {
-					bs_get_modal("Upload Error", "Max file size (" + me.options.max_file_size + "M) exceeded.").modal("show");
-					throw "file size exceeded";
-				}
-			}
-			callback(dataurl);
-		}
-		freader.readAsDataURL(fileobj);
-	},
-
-	get_value: function() {
-		return this.clean_html()
-	},
-
-	set_input: function(value) {
-		if(this.options.field && this.options.field.inside_change_event)
-			return;
-		if(value==null) value = "";
-		this.last_html = value;
-		this.editor.html(value);
-	}
-
-})
-
-bsEditorToolbar = Class.extend({
-	init: function(options, parent, editor) {
-		this.options = options;
-		this.editor = editor;
-		this.inline = !!parent;
-		this.options.toolbar_style = $.extend((this.inline ? this.inline_style : this.fixed_style),
-			this.options.toolbar_style || {});
-		this.make(parent);
-		this.toolbar.css(this.options.toolbar_style);
-		this.setup_image_button();
-		this.bind_events();
-		//this.bind_touch();
-	},
-	fixed_style: {
-		position: "fixed",
-		top: "0px",
-		"padding-top": "5px",
-		width: "100%",
-		height: "45px",
-		"background-color": "black",
-		display: "none"
-	},
-	inline_style: {
-		"padding-top": "5px",
-	},
-	make: function(parent) {
-		if(!parent)
-			parent = $("body");
-		if(!parent.find(".frappe-list-toolbar").length) {
-			this.toolbar = $(frappe.render_template("editor")).prependTo(parent);
-
-			if(this.inline) {
-				this.toolbar.find("[data-action]").remove();
-			} else {
-				this.toolbar.find(".btn-toolbar").addClass("container");
-			}
-		}
-	},
-
-	setup_image_button: function() {
-		// magic-overlay
-		var me = this;
-		this.file_input = this.toolbar.find('input[type="file"]')
-			.css({
-				'visibility': 'hidden',
-				'width':0,
-				'height':0
-			});
-		this.toolbar.find(".btn-insert-img").on("click", function() {
-			me.file_input.trigger("click");
-		})
-	},
-
-	show: function() {
-		var me = this;
-		this.toolbar.toggle(true);
-		if(!this.inline) {
-			$("body").animate({"padding-top": this.toolbar.outerHeight() }, {
-				complete: function() { 	me.toolbar.css("z-index", 1001); }
-			});
-		}
-	},
-
-	hide: function() {
-		if(!this.editor)
-			return;
-		var me = this;
-		this.toolbar.css("z-index", 0);
-		if(!this.inline) {
-			$("body").animate({"padding-top": 0 }, {complete: function() {
-				me.toolbar.toggle(false);
-			}});
-		}
-
-		this.editor && this.editor.attr('contenteditable', false).data("object").onhide();
-		this.editor = null;
-	},
-
-	bind_events: function () {
-		var me = this;
-
-		// standard button events
-		this.toolbar.find('a[data-' + me.options.command_role + ']').click(function (e) {
-			me.restore_selection();
-			me.editor.focus();
-			me.execCommand($(this).data(me.options.command_role));
-			me.save_selection();
-			// close dropdown
-			if(me.toolbar.find("ul.dropdown-menu:visible").length)
-				me.toolbar.find('[data-toggle="dropdown"]').dropdown("toggle");
-			e.stopPropagation();
-			e.preventDefault();
-			return false;
-		});
-		this.toolbar.find('[data-toggle=dropdown]').click(function() { me.restore_selection() });
-
-		// link
-		this.toolbar.find(".btn-add-link").on("click", function() {
-			if(!me.toolbar.bs_link_editor) {
-				if(me.inline) {
-					me.toolbar.bs_link_editor = new bsLinkEditor(me);
-				} else {
-					if(!window.bs_link_editor) {
-						window.bs_link_editor = new bsLinkEditor(me);
-					}
-					me.toolbar.bs_link_editor = window.bs_link_editor;
-				}
-			}
-			me.toolbar.bs_link_editor.show();
-		});
-
-		// file event
-		this.toolbar.find('input[type=file][data-' + me.options.command_role + ']').change(function () {
-			me.restore_selection();
-			if (this.type === 'file' && this.files && this.files.length > 0) {
-				me.editor.data("object").insert_files(this.files);
-			}
-			me.save_selection();
-			this.value = '';
-
-			return false;
-		});
-
-		// save
-		this.toolbar.find("[data-action='Save']").on("click", function() { me.hide(); });
-
-		// edit html
-		this.toolbar.find(".btn-html").on("click", function() {
-			new bsHTMLEditor().show(me.editor);
-		});
-	},
-
-	update: function () {
-		var me = this;
-		if (this.toolbar) {
-			$(this.toolbar).find('.btn[data-' + this.options.command_role + ']').each(function () {
-				var command = $(this).data(me.options.command_role);
-
-				// try catch for buggy firefox!
-				try {
-					var query_command_state = document.queryCommandState(command);
-				} catch(e) {
-					var query_command_state = false;
-				}
-
-				if (query_command_state) {
-					$(this).addClass(me.options.active_toolbar_class);
-				} else {
-					$(this).removeClass(me.options.active_toolbar_class);
-				}
-			});
-		}
-	},
-
-	execCommand: function (commandWithArgs, valueArg) {
-		var commandArr = commandWithArgs.split(' '),
-			command = commandArr.shift(),
-			args = commandArr.join(' ') + (valueArg || '');
-		document.execCommand(command, 0, args);
-		this.update();
-	},
-
-	get_current_range: function () {
-		var sel = window.getSelection();
-		if (sel.getRangeAt && sel.rangeCount) {
-			return sel.getRangeAt(0);
-		}
-	},
-
-	save_selection: function () {
-		this.selected_range = this.get_current_range();
-	},
-
-	restore_selection: function () {
-		var selection = window.getSelection();
-		if (this.selected_range) {
-			selection.removeAllRanges();
-			selection.addRange(this.selected_range);
-		}
-	},
-
-	mark_selection: function (input, color) {
-		this.restore_selection();
-		document.execCommand('hiliteColor', 0, color || 'transparent');
-		this.save_selection();
-		input.data(this.options.selection_marker, color);
-	},
-
-	// bind_touch: function() {
-	// 	var me = this;
-	// 	$(window).bind('touchend', function (e) {
-	// 		var isInside = (me.editor.is(e.target) || me.editor.has(e.target).length > 0),
-	// 			current_range = me.get_current_range(),
-	// 			clear = current_range && (current_range.startContainer === current_range.endContainer && current_range.startOffset === current_range.endOffset);
-	// 		if (!clear || isInside) {
-	// 			me.save_selection();
-	// 			me.update();
-	// 		}
-	// 	});
-	// }
-});
-
-bsHTMLEditor = Class.extend({
-	init: function() {
-		var me = this;
-		this.modal = bs_get_modal("<i class='fa fa-code'></i> Edit HTML", '<textarea class="form-control" \
-			style="height: 400px; width: 100%; font-family: Monaco, \'Courier New\', monospace; font-size: 11px">\
-			</textarea>');
-			this.modal.addClass("frappe-ignore-click");
-		this.modal.find(".btn-primary").removeClass("hide").html(__("Update")).on("click", function() {
-			me._html = me.modal.find("textarea").val();
-
-			$.each(me.editor.dataurls, function(key, val) {
-				me._html = replace_all(me._html, key, val);
-			});
-
-			var editor = me.editor.data("object");
-			editor.set_input(me._html);
-			editor.options.change && editor.options.change(editor.clean_html());
-			me.modal.modal("hide");
-		});
-	},
-	show: function(editor) {
-		var me = this;
-		this.editor = editor;
-		this.modal.modal("show");
-		var html = me.editor.html();
-		// pack dataurls so that html display is faster
-		this.editor.dataurls = {}
-		html = html.replace(/<img\s*src=\s*["\'](data:[^,]*),([^"\']*)["\']/g, function(full, g1, g2) {
-			var key = g2.slice(0,5) + "..." + g2.slice(-5);
-			me.editor.dataurls[key] = g1 + "," + g2;
-			return '<img src="'+ key+'"';
-		});
-		this.modal.find("textarea").val(html_beautify(html));
-	}
-});
-
-bsLinkEditor = Class.extend({
-	init: function(toolbar) {
-		var me = this;
-		this.toolbar = toolbar;
-		this.modal = bs_get_modal("<i class='fa fa-globe'></i> Insert Link", '<div class="form-group">\
-				<input type="text" class="form-control" placeholder="http://example.com" />\
-			</div>\
-			<div class="checkbox" style="position: static;">\
-				<label>\
-				    <input type="checkbox"> <span>' + __("Open Link in a new Window") + '</span>\
-				</label>\
-			</div>\
-			<button class="btn btn-primary" style="margin-top: 7px;">' + __("Insert") + '</button>');
-
-		this.modal.addClass("frappe-ignore-click");
-		this.modal.find(".btn-primary").on("click", function() {
-			me.toolbar.restore_selection();
-			var url = me.modal.find("input[type=text]").val();
-			var selection = me.toolbar.selected_range.toString();
-			if(url) {
-				if(me.modal.find("input[type=checkbox]:checked").length) {
-					var html = "<a href='" + url + "' target='_blank'>" + selection + "</a>";
-					document.execCommand("insertHTML", false, html);
-				} else {
-					document.execCommand("CreateLink", false, url);
-				}
-			}
-			me.modal.modal("hide");
-			return false;
-		});
-	},
-	show: function() {
-		this.modal.find("input[type=text]").val("");
-		this.modal.modal("show");
-	}
-});
-
-bs_get_modal = frappe.get_modal;
diff --git a/frappe/public/js/frappe/ui/keyboard.js b/frappe/public/js/frappe/ui/keyboard.js
index a283b40284..5acc54edcd 100644
--- a/frappe/public/js/frappe/ui/keyboard.js
+++ b/frappe/public/js/frappe/ui/keyboard.js
@@ -2,23 +2,7 @@ frappe.provide('frappe.ui.keys.handlers');
 
 frappe.ui.keys.setup = function() {
 	$(window).on('keydown', function(e) {
-		var key = e.key;
-		//safari doesn't have key property
-		if(!key) {
-			key = String.fromCharCode(e.keyCode).toLowerCase();
-		}
-		if(key.substr(0, 5)==='Arrow') {
-			// ArrowDown -> down
-			key = key.substr(5).toLowerCase();
-		}
-		if(e.ctrlKey || e.metaKey) {
-			// add ctrl+ the key
-			key = 'ctrl+' + key;
-		}
-		if(e.shiftKey) {
-			// add ctrl+ the key
-			key = 'shift+' + key;
-		}
+		var key = frappe.ui.keys.get_key(e);
 		if(frappe.ui.keys.handlers[key]) {
 			var out = null;
 			for(var i=0, l = frappe.ui.keys.handlers[key].length; i<l; i++) {
@@ -34,6 +18,29 @@ frappe.ui.keys.setup = function() {
 	});
 }
 
+frappe.ui.keys.get_key = function(e) {
+	var key = e.key;
+	//safari doesn't have key property
+	if(!key) {
+		var keycode = e.keyCode || e.which;
+		key = frappe.ui.keys.key_map[keycode] ||
+			String.fromCharCode(keycode);
+	}
+	if(key.substr(0, 5)==='Arrow') {
+		// ArrowDown -> down
+		key = key.substr(5).toLowerCase();
+	}
+	if(e.ctrlKey || e.metaKey) {
+		// add ctrl+ the key
+		key = 'ctrl+' + key;
+	}
+	if(e.shiftKey) {
+		// add ctrl+ the key
+		key = 'shift+' + key;
+	}
+	return key.toLowerCase();
+}
+
 frappe.ui.keys.on = function(key, handler) {
 	if(!frappe.ui.keys.handlers[key]) {
 		frappe.ui.keys.handlers[key] = [];
@@ -98,3 +105,14 @@ frappe.ui.keys.on('ctrl+up', function(e) {
 frappe.ui.keys.on('shift+ctrl+r', function(e) {
 	frappe.ui.toolbar.clear_cache();
 });
+
+frappe.ui.keys.key_map = {
+	8: 'backspace',
+	9: 'tab',
+	13: 'enter',
+	16: 'shift',
+	17: 'ctrl',
+	91: 'meta',
+	18: 'alt',
+	27: 'escape'
+}
\ No newline at end of file
diff --git a/frappe/public/js/lib/summernote/summernote.css b/frappe/public/js/lib/summernote/summernote.css
new file mode 100755
index 0000000000..7b23e34a1a
--- /dev/null
+++ b/frappe/public/js/lib/summernote/summernote.css
@@ -0,0 +1 @@
+@font-face{font-family:"summernote";font-style:normal;font-weight:normal;src:url("font/summernote.eot?ad8d7e2d177d2473aecd9b35d16211fb");src:url("font/summernote.eot?#iefix") format("embedded-opentype"),url("font/summernote.woff?ad8d7e2d177d2473aecd9b35d16211fb") format("woff"),url("font/summernote.ttf?ad8d7e2d177d2473aecd9b35d16211fb") format("truetype")}[class^="note-icon-"]:before,[class*=" note-icon-"]:before{display:inline-block;font:normal normal normal 14px summernote;font-size:inherit;-webkit-font-smoothing:antialiased;text-decoration:inherit;text-rendering:auto;text-transform:none;vertical-align:middle;speak:none;-moz-osx-font-smoothing:grayscale}.note-icon-align-center:before{content:"\f101"}.note-icon-align-indent:before{content:"\f102"}.note-icon-align-justify:before{content:"\f103"}.note-icon-align-left:before{content:"\f104"}.note-icon-align-outdent:before{content:"\f105"}.note-icon-align-right:before{content:"\f106"}.note-icon-align:before{content:"\f107"}.note-icon-arrows-alt:before{content:"\f108"}.note-icon-bold:before{content:"\f109"}.note-icon-caret:before{content:"\f10a"}.note-icon-chain-broken:before{content:"\f10b"}.note-icon-circle:before{content:"\f10c"}.note-icon-close:before{content:"\f10d"}.note-icon-code:before{content:"\f10e"}.note-icon-eraser:before{content:"\f10f"}.note-icon-font:before{content:"\f110"}.note-icon-frame:before{content:"\f111"}.note-icon-italic:before{content:"\f112"}.note-icon-link:before{content:"\f113"}.note-icon-magic:before{content:"\f114"}.note-icon-menu-check:before{content:"\f115"}.note-icon-minus:before{content:"\f116"}.note-icon-orderedlist:before{content:"\f117"}.note-icon-pencil:before{content:"\f118"}.note-icon-picture:before{content:"\f119"}.note-icon-question:before{content:"\f11a"}.note-icon-redo:before{content:"\f11b"}.note-icon-special-character:before{content:"\f11c"}.note-icon-square:before{content:"\f11d"}.note-icon-strikethrough:before{content:"\f11e"}.note-icon-subscript:before{content:"\f11f"}.note-icon-summernote:before{content:"\f120"}.note-icon-superscript:before{content:"\f121"}.note-icon-table:before{content:"\f122"}.note-icon-text-height:before{content:"\f123"}.note-icon-trash:before{content:"\f124"}.note-icon-underline:before{content:"\f125"}.note-icon-undo:before{content:"\f126"}.note-icon-unorderedlist:before{content:"\f127"}.note-icon-video:before{content:"\f128"}.note-editor{position:relative}.note-editor .note-dropzone{position:absolute;z-index:100;display:none;color:#87cefa;background-color:white;opacity:.95}.note-editor .note-dropzone .note-dropzone-message{display:table-cell;font-size:28px;font-weight:bold;text-align:center;vertical-align:middle}.note-editor .note-dropzone.hover{color:#098ddf}.note-editor.dragover .note-dropzone{display:table}.note-editor .note-editing-area{position:relative}.note-editor .note-editing-area .note-editable{outline:0}.note-editor .note-editing-area .note-editable sup{vertical-align:super}.note-editor .note-editing-area .note-editable sub{vertical-align:sub}.note-editor.note-frame{border:1px solid #a9a9a9}.note-editor.note-frame.codeview .note-editing-area .note-editable{display:none}.note-editor.note-frame.codeview .note-editing-area .note-codable{display:block}.note-editor.note-frame .note-editing-area{overflow:hidden}.note-editor.note-frame .note-editing-area .note-editable{padding:10px;overflow:auto;color:#000;background-color:#fff}.note-editor.note-frame .note-editing-area .note-editable[contenteditable="false"]{background-color:#e5e5e5}.note-editor.note-frame .note-editing-area .note-codable{display:none;width:100%;padding:10px;margin-bottom:0;font-family:Menlo,Monaco,monospace,sans-serif;font-size:14px;color:#ccc;background-color:#222;border:0;-webkit-border-radius:0;-moz-border-radius:0;border-radius:0;box-shadow:none;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;-ms-box-sizing:border-box;box-sizing:border-box;resize:none}.note-editor.note-frame.fullscreen{position:fixed;top:0;left:0;z-index:1050;width:100%!important}.note-editor.note-frame.fullscreen .note-editable{background-color:white}.note-editor.note-frame.fullscreen .note-resizebar{display:none}.note-editor.note-frame .note-statusbar{background-color:#f5f5f5;border-bottom-right-radius:4px;border-bottom-left-radius:4px}.note-editor.note-frame .note-statusbar .note-resizebar{width:100%;height:8px;padding-top:1px;cursor:ns-resize}.note-editor.note-frame .note-statusbar .note-resizebar .note-icon-bar{width:20px;margin:1px auto;border-top:1px solid #a9a9a9}.note-editor.note-frame .note-placeholder{padding:10px}.note-popover.popover{max-width:none}.note-popover.popover .popover-content a{display:inline-block;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:middle}.note-popover.popover .arrow{left:20px!important}.note-popover .popover-content,.panel-heading.note-toolbar{padding:0 0 5px 5px;margin:0}.note-popover .popover-content>.btn-group,.panel-heading.note-toolbar>.btn-group{margin-top:5px;margin-right:5px;margin-left:0}.note-popover .popover-content .btn-group .note-table,.panel-heading.note-toolbar .btn-group .note-table{min-width:0;padding:5px}.note-popover .popover-content .btn-group .note-table .note-dimension-picker,.panel-heading.note-toolbar .btn-group .note-table .note-dimension-picker{font-size:18px}.note-popover .popover-content .btn-group .note-table .note-dimension-picker .note-dimension-picker-mousecatcher,.panel-heading.note-toolbar .btn-group .note-table .note-dimension-picker .note-dimension-picker-mousecatcher{position:absolute!important;z-index:3;width:10em;height:10em;cursor:pointer}.note-popover .popover-content .btn-group .note-table .note-dimension-picker .note-dimension-picker-unhighlighted,.panel-heading.note-toolbar .btn-group .note-table .note-dimension-picker .note-dimension-picker-unhighlighted{position:relative!important;z-index:1;width:5em;height:5em;background:url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASAgMAAAAroGbEAAAACVBMVEUAAIj4+Pjp6ekKlAqjAAAAAXRSTlMAQObYZgAAAAFiS0dEAIgFHUgAAAAJcEhZcwAACxMAAAsTAQCanBgAAAAHdElNRQfYAR0BKhmnaJzPAAAAG0lEQVQI12NgAAOtVatWMTCohoaGUY+EmIkEAEruEzK2J7tvAAAAAElFTkSuQmCC') repeat}.note-popover .popover-content .btn-group .note-table .note-dimension-picker .note-dimension-picker-highlighted,.panel-heading.note-toolbar .btn-group .note-table .note-dimension-picker .note-dimension-picker-highlighted{position:absolute!important;z-index:2;width:1em;height:1em;background:url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASAgMAAAAroGbEAAAACVBMVEUAAIjd6vvD2f9LKLW+AAAAAXRSTlMAQObYZgAAAAFiS0dEAIgFHUgAAAAJcEhZcwAACxMAAAsTAQCanBgAAAAHdElNRQfYAR0BKwNDEVT0AAAAG0lEQVQI12NgAAOtVatWMTCohoaGUY+EmIkEAEruEzK2J7tvAAAAAElFTkSuQmCC') repeat}.note-popover .popover-content .note-style h1,.panel-heading.note-toolbar .note-style h1,.note-popover .popover-content .note-style h2,.panel-heading.note-toolbar .note-style h2,.note-popover .popover-content .note-style h3,.panel-heading.note-toolbar .note-style h3,.note-popover .popover-content .note-style h4,.panel-heading.note-toolbar .note-style h4,.note-popover .popover-content .note-style h5,.panel-heading.note-toolbar .note-style h5,.note-popover .popover-content .note-style h6,.panel-heading.note-toolbar .note-style h6,.note-popover .popover-content .note-style blockquote,.panel-heading.note-toolbar .note-style blockquote{margin:0}.note-popover .popover-content .note-color .dropdown-toggle,.panel-heading.note-toolbar .note-color .dropdown-toggle{width:20px;padding-left:5px}.note-popover .popover-content .note-color .dropdown-menu,.panel-heading.note-toolbar .note-color .dropdown-menu{min-width:340px}.note-popover .popover-content .note-color .dropdown-menu .btn-group,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group{margin:0}.note-popover .popover-content .note-color .dropdown-menu .btn-group:first-child,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group:first-child{margin:0 5px}.note-popover .popover-content .note-color .dropdown-menu .btn-group .note-palette-title,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group .note-palette-title{margin:2px 7px;font-size:12px;text-align:center;border-bottom:1px solid #eee}.note-popover .popover-content .note-color .dropdown-menu .btn-group .note-color-reset,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group .note-color-reset{width:100%;padding:0 3px;margin:3px;font-size:11px;cursor:pointer;-webkit-border-radius:5px;-moz-border-radius:5px;border-radius:5px}.note-popover .popover-content .note-color .dropdown-menu .btn-group .note-color-row,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group .note-color-row{height:20px}.note-popover .popover-content .note-color .dropdown-menu .btn-group .note-color-reset:hover,.panel-heading.note-toolbar .note-color .dropdown-menu .btn-group .note-color-reset:hover{background:#eee}.note-popover .popover-content .note-para .dropdown-menu,.panel-heading.note-toolbar .note-para .dropdown-menu{min-width:216px;padding:5px}.note-popover .popover-content .note-para .dropdown-menu>div:first-child,.panel-heading.note-toolbar .note-para .dropdown-menu>div:first-child{margin-right:5px}.note-popover .popover-content .dropdown-menu,.panel-heading.note-toolbar .dropdown-menu{min-width:90px}.note-popover .popover-content .dropdown-menu.right,.panel-heading.note-toolbar .dropdown-menu.right{right:0;left:auto}.note-popover .popover-content .dropdown-menu.right::before,.panel-heading.note-toolbar .dropdown-menu.right::before{right:9px;left:auto!important}.note-popover .popover-content .dropdown-menu.right::after,.panel-heading.note-toolbar .dropdown-menu.right::after{right:10px;left:auto!important}.note-popover .popover-content .dropdown-menu.note-check li a i,.panel-heading.note-toolbar .dropdown-menu.note-check li a i{color:deepskyblue;visibility:hidden}.note-popover .popover-content .dropdown-menu.note-check li a.checked i,.panel-heading.note-toolbar .dropdown-menu.note-check li a.checked i{visibility:visible}.note-popover .popover-content .note-fontsize-10,.panel-heading.note-toolbar .note-fontsize-10{font-size:10px}.note-popover .popover-content .note-color-palette,.panel-heading.note-toolbar .note-color-palette{line-height:1}.note-popover .popover-content .note-color-palette div .note-color-btn,.panel-heading.note-toolbar .note-color-palette div .note-color-btn{width:20px;height:20px;padding:0;margin:0;border:1px solid #fff}.note-popover .popover-content .note-color-palette div .note-color-btn:hover,.panel-heading.note-toolbar .note-color-palette div .note-color-btn:hover{border:1px solid #000}.note-dialog>div{display:none}.note-dialog .form-group{margin-right:0;margin-left:0}.note-dialog .note-modal-form{margin:0}.note-dialog .note-image-dialog .note-dropzone{min-height:100px;margin-bottom:10px;font-size:30px;line-height:4;color:lightgray;text-align:center;border:4px dashed lightgray}@-moz-document url-prefix(){.note-image-input{height:auto}}.note-placeholder{position:absolute;display:none;color:gray}.note-handle .note-control-selection{position:absolute;display:none;border:1px solid black}.note-handle .note-control-selection>div{position:absolute}.note-handle .note-control-selection .note-control-selection-bg{width:100%;height:100%;background-color:black;-webkit-opacity:.3;-khtml-opacity:.3;-moz-opacity:.3;opacity:.3;-ms-filter:alpha(opacity=30);filter:alpha(opacity=30)}.note-handle .note-control-selection .note-control-handle{width:7px;height:7px;border:1px solid black}.note-handle .note-control-selection .note-control-holder{width:7px;height:7px;border:1px solid black}.note-handle .note-control-selection .note-control-sizing{width:7px;height:7px;background-color:white;border:1px solid black}.note-handle .note-control-selection .note-control-nw{top:-5px;left:-5px;border-right:0;border-bottom:0}.note-handle .note-control-selection .note-control-ne{top:-5px;right:-5px;border-bottom:0;border-left:none}.note-handle .note-control-selection .note-control-sw{bottom:-5px;left:-5px;border-top:0;border-right:0}.note-handle .note-control-selection .note-control-se{right:-5px;bottom:-5px;cursor:se-resize}.note-handle .note-control-selection .note-control-se.note-control-holder{cursor:default;border-top:0;border-left:none}.note-handle .note-control-selection .note-control-selection-info{right:0;bottom:0;padding:5px;margin:5px;font-size:12px;color:white;background-color:black;-webkit-border-radius:5px;-moz-border-radius:5px;border-radius:5px;-webkit-opacity:.7;-khtml-opacity:.7;-moz-opacity:.7;opacity:.7;-ms-filter:alpha(opacity=70);filter:alpha(opacity=70)}.note-hint-popover{min-width:100px;padding:2px}.note-hint-popover .popover-content{max-height:150px;padding:3px;overflow:auto}.note-hint-popover .popover-content .note-hint-group .note-hint-item{display:block!important;padding:3px}.note-hint-popover .popover-content .note-hint-group .note-hint-item.active,.note-hint-popover .popover-content .note-hint-group .note-hint-item:hover{display:block;clear:both;font-weight:400;line-height:1.4;color:white;text-decoration:none;white-space:nowrap;cursor:pointer;background-color:#428bca;outline:0}
\ No newline at end of file
diff --git a/frappe/public/js/lib/summernote/summernote.js b/frappe/public/js/lib/summernote/summernote.js
new file mode 100755
index 0000000000..a7cb3a7a0e
--- /dev/null
+++ b/frappe/public/js/lib/summernote/summernote.js
@@ -0,0 +1,7046 @@
+/**
+ * Super simple wysiwyg editor v0.8.2
+ * http://summernote.org/
+ *
+ * summernote.js
+ * Copyright 2013-2016 Alan Hong. and other contributors
+ * summernote may be freely distributed under the MIT license./
+ *
+ * Date: 2016-08-07T05:11Z
+ */
+(function (factory) {
+  /* global define */
+  if (typeof define === 'function' && define.amd) {
+    // AMD. Register as an anonymous module.
+    define(['jquery'], factory);
+  } else if (typeof module === 'object' && module.exports) {
+    // Node/CommonJS
+    module.exports = factory(require('jquery'));
+  } else {
+    // Browser globals
+    factory(window.jQuery);
+  }
+}(function ($) {
+  'use strict';
+
+  /**
+   * @class core.func
+   *
+   * func utils (for high-order func's arg)
+   *
+   * @singleton
+   * @alternateClassName func
+   */
+  var func = (function () {
+    var eq = function (itemA) {
+      return function (itemB) {
+        return itemA === itemB;
+      };
+    };
+
+    var eq2 = function (itemA, itemB) {
+      return itemA === itemB;
+    };
+
+    var peq2 = function (propName) {
+      return function (itemA, itemB) {
+        return itemA[propName] === itemB[propName];
+      };
+    };
+
+    var ok = function () {
+      return true;
+    };
+
+    var fail = function () {
+      return false;
+    };
+
+    var not = function (f) {
+      return function () {
+        return !f.apply(f, arguments);
+      };
+    };
+
+    var and = function (fA, fB) {
+      return function (item) {
+        return fA(item) && fB(item);
+      };
+    };
+
+    var self = function (a) {
+      return a;
+    };
+
+    var invoke = function (obj, method) {
+      return function () {
+        return obj[method].apply(obj, arguments);
+      };
+    };
+
+    var idCounter = 0;
+
+    /**
+     * generate a globally-unique id
+     *
+     * @param {String} [prefix]
+     */
+    var uniqueId = function (prefix) {
+      var id = ++idCounter + '';
+      return prefix ? prefix + id : id;
+    };
+
+    /**
+     * returns bnd (bounds) from rect
+     *
+     * - IE Compatibility Issue: http://goo.gl/sRLOAo
+     * - Scroll Issue: http://goo.gl/sNjUc
+     *
+     * @param {Rect} rect
+     * @return {Object} bounds
+     * @return {Number} bounds.top
+     * @return {Number} bounds.left
+     * @return {Number} bounds.width
+     * @return {Number} bounds.height
+     */
+    var rect2bnd = function (rect) {
+      var $document = $(document);
+      return {
+        top: rect.top + $document.scrollTop(),
+        left: rect.left + $document.scrollLeft(),
+        width: rect.right - rect.left,
+        height: rect.bottom - rect.top
+      };
+    };
+
+    /**
+     * returns a copy of the object where the keys have become the values and the values the keys.
+     * @param {Object} obj
+     * @return {Object}
+     */
+    var invertObject = function (obj) {
+      var inverted = {};
+      for (var key in obj) {
+        if (obj.hasOwnProperty(key)) {
+          inverted[obj[key]] = key;
+        }
+      }
+      return inverted;
+    };
+
+    /**
+     * @param {String} namespace
+     * @param {String} [prefix]
+     * @return {String}
+     */
+    var namespaceToCamel = function (namespace, prefix) {
+      prefix = prefix || '';
+      return prefix + namespace.split('.').map(function (name) {
+        return name.substring(0, 1).toUpperCase() + name.substring(1);
+      }).join('');
+    };
+
+    /**
+     * Returns a function, that, as long as it continues to be invoked, will not
+     * be triggered. The function will be called after it stops being called for
+     * N milliseconds. If `immediate` is passed, trigger the function on the
+     * leading edge, instead of the trailing.
+     * @param {Function} func
+     * @param {Number} wait
+     * @param {Boolean} immediate
+     * @return {Function}
+     */
+    var debounce = function (func, wait, immediate) {
+      var timeout;
+      return function () {
+        var context = this, args = arguments;
+        var later = function () {
+          timeout = null;
+          if (!immediate) {
+            func.apply(context, args);
+          }
+        };
+        var callNow = immediate && !timeout;
+        clearTimeout(timeout);
+        timeout = setTimeout(later, wait);
+        if (callNow) {
+          func.apply(context, args);
+        }
+      };
+    };
+
+    return {
+      eq: eq,
+      eq2: eq2,
+      peq2: peq2,
+      ok: ok,
+      fail: fail,
+      self: self,
+      not: not,
+      and: and,
+      invoke: invoke,
+      uniqueId: uniqueId,
+      rect2bnd: rect2bnd,
+      invertObject: invertObject,
+      namespaceToCamel: namespaceToCamel,
+      debounce: debounce
+    };
+  })();
+
+  /**
+   * @class core.list
+   *
+   * list utils
+   *
+   * @singleton
+   * @alternateClassName list
+   */
+  var list = (function () {
+    /**
+     * returns the first item of an array.
+     *
+     * @param {Array} array
+     */
+    var head = function (array) {
+      return array[0];
+    };
+
+    /**
+     * returns the last item of an array.
+     *
+     * @param {Array} array
+     */
+    var last = function (array) {
+      return array[array.length - 1];
+    };
+
+    /**
+     * returns everything but the last entry of the array.
+     *
+     * @param {Array} array
+     */
+    var initial = function (array) {
+      return array.slice(0, array.length - 1);
+    };
+
+    /**
+     * returns the rest of the items in an array.
+     *
+     * @param {Array} array
+     */
+    var tail = function (array) {
+      return array.slice(1);
+    };
+
+    /**
+     * returns item of array
+     */
+    var find = function (array, pred) {
+      for (var idx = 0, len = array.length; idx < len; idx ++) {
+        var item = array[idx];
+        if (pred(item)) {
+          return item;
+        }
+      }
+    };
+
+    /**
+     * returns true if all of the values in the array pass the predicate truth test.
+     */
+    var all = function (array, pred) {
+      for (var idx = 0, len = array.length; idx < len; idx ++) {
+        if (!pred(array[idx])) {
+          return false;
+        }
+      }
+      return true;
+    };
+
+    /**
+     * returns index of item
+     */
+    var indexOf = function (array, item) {
+      return $.inArray(item, array);
+    };
+
+    /**
+     * returns true if the value is present in the list.
+     */
+    var contains = function (array, item) {
+      return indexOf(array, item) !== -1;
+    };
+
+    /**
+     * get sum from a list
+     *
+     * @param {Array} array - array
+     * @param {Function} fn - iterator
+     */
+    var sum = function (array, fn) {
+      fn = fn || func.self;
+      return array.reduce(function (memo, v) {
+        return memo + fn(v);
+      }, 0);
+    };
+  
+    /**
+     * returns a copy of the collection with array type.
+     * @param {Collection} collection - collection eg) node.childNodes, ...
+     */
+    var from = function (collection) {
+      var result = [], idx = -1, length = collection.length;
+      while (++idx < length) {
+        result[idx] = collection[idx];
+      }
+      return result;
+    };
+
+    /**
+     * returns whether list is empty or not
+     */
+    var isEmpty = function (array) {
+      return !array || !array.length;
+    };
+  
+    /**
+     * cluster elements by predicate function.
+     *
+     * @param {Array} array - array
+     * @param {Function} fn - predicate function for cluster rule
+     * @param {Array[]}
+     */
+    var clusterBy = function (array, fn) {
+      if (!array.length) { return []; }
+      var aTail = tail(array);
+      return aTail.reduce(function (memo, v) {
+        var aLast = last(memo);
+        if (fn(last(aLast), v)) {
+          aLast[aLast.length] = v;
+        } else {
+          memo[memo.length] = [v];
+        }
+        return memo;
+      }, [[head(array)]]);
+    };
+  
+    /**
+     * returns a copy of the array with all false values removed
+     *
+     * @param {Array} array - array
+     * @param {Function} fn - predicate function for cluster rule
+     */
+    var compact = function (array) {
+      var aResult = [];
+      for (var idx = 0, len = array.length; idx < len; idx ++) {
+        if (array[idx]) { aResult.push(array[idx]); }
+      }
+      return aResult;
+    };
+
+    /**
+     * produces a duplicate-free version of the array
+     *
+     * @param {Array} array
+     */
+    var unique = function (array) {
+      var results = [];
+
+      for (var idx = 0, len = array.length; idx < len; idx ++) {
+        if (!contains(results, array[idx])) {
+          results.push(array[idx]);
+        }
+      }
+
+      return results;
+    };
+
+    /**
+     * returns next item.
+     * @param {Array} array
+     */
+    var next = function (array, item) {
+      var idx = indexOf(array, item);
+      if (idx === -1) { return null; }
+
+      return array[idx + 1];
+    };
+
+    /**
+     * returns prev item.
+     * @param {Array} array
+     */
+    var prev = function (array, item) {
+      var idx = indexOf(array, item);
+      if (idx === -1) { return null; }
+
+      return array[idx - 1];
+    };
+
+    return { head: head, last: last, initial: initial, tail: tail,
+             prev: prev, next: next, find: find, contains: contains,
+             all: all, sum: sum, from: from, isEmpty: isEmpty,
+             clusterBy: clusterBy, compact: compact, unique: unique };
+  })();
+
+  var isSupportAmd = typeof define === 'function' && define.amd;
+
+  /**
+   * returns whether font is installed or not.
+   *
+   * @param {String} fontName
+   * @return {Boolean}
+   */
+  var isFontInstalled = function (fontName) {
+    var testFontName = fontName === 'Comic Sans MS' ? 'Courier New' : 'Comic Sans MS';
+    var $tester = $('<div>').css({
+      position: 'absolute',
+      left: '-9999px',
+      top: '-9999px',
+      fontSize: '200px'
+    }).text('mmmmmmmmmwwwwwww').appendTo(document.body);
+
+    var originalWidth = $tester.css('fontFamily', testFontName).width();
+    var width = $tester.css('fontFamily', fontName + ',' + testFontName).width();
+
+    $tester.remove();
+
+    return originalWidth !== width;
+  };
+
+  var userAgent = navigator.userAgent;
+  var isMSIE = /MSIE|Trident/i.test(userAgent);
+  var browserVersion;
+  if (isMSIE) {
+    var matches = /MSIE (\d+[.]\d+)/.exec(userAgent);
+    if (matches) {
+      browserVersion = parseFloat(matches[1]);
+    }
+    matches = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(userAgent);
+    if (matches) {
+      browserVersion = parseFloat(matches[1]);
+    }
+  }
+
+  var isEdge = /Edge\/\d+/.test(userAgent);
+
+  var hasCodeMirror = !!window.CodeMirror;
+  if (!hasCodeMirror && isSupportAmd && typeof require !== 'undefined') {
+    if (typeof require.resolve !== 'undefined') {
+      try {
+        // If CodeMirror can't be resolved, `require.resolve` will throw an
+        // exception and `hasCodeMirror` won't be set to `true`.
+        require.resolve('codemirror');
+        hasCodeMirror = true;
+      } catch (e) {
+        // Do nothing.
+      }
+    } else if (typeof eval('require').specified !== 'undefined') {
+      hasCodeMirror = eval('require').specified('codemirror');
+    }
+  }
+
+  /**
+   * @class core.agent
+   *
+   * Object which check platform and agent
+   *
+   * @singleton
+   * @alternateClassName agent
+   */
+  var agent = {
+    isMac: navigator.appVersion.indexOf('Mac') > -1,
+    isMSIE: isMSIE,
+    isEdge: isEdge,
+    isFF: !isEdge && /firefox/i.test(userAgent),
+    isPhantom: /PhantomJS/i.test(userAgent),
+    isWebkit: !isEdge && /webkit/i.test(userAgent),
+    isChrome: !isEdge && /chrome/i.test(userAgent),
+    isSafari: !isEdge && /safari/i.test(userAgent),
+    browserVersion: browserVersion,
+    jqueryVersion: parseFloat($.fn.jquery),
+    isSupportAmd: isSupportAmd,
+    hasCodeMirror: hasCodeMirror,
+    isFontInstalled: isFontInstalled,
+    isW3CRangeSupport: !!document.createRange
+  };
+
+
+  var NBSP_CHAR = String.fromCharCode(160);
+  var ZERO_WIDTH_NBSP_CHAR = '\ufeff';
+
+  /**
+   * @class core.dom
+   *
+   * Dom functions
+   *
+   * @singleton
+   * @alternateClassName dom
+   */
+  var dom = (function () {
+    /**
+     * @method isEditable
+     *
+     * returns whether node is `note-editable` or not.
+     *
+     * @param {Node} node
+     * @return {Boolean}
+     */
+    var isEditable = function (node) {
+      return node && $(node).hasClass('note-editable');
+    };
+
+    /**
+     * @method isControlSizing
+     *
+     * returns whether node is `note-control-sizing` or not.
+     *
+     * @param {Node} node
+     * @return {Boolean}
+     */
+    var isControlSizing = function (node) {
+      return node && $(node).hasClass('note-control-sizing');
+    };
+
+    /**
+     * @method makePredByNodeName
+     *
+     * returns predicate which judge whether nodeName is same
+     *
+     * @param {String} nodeName
+     * @return {Function}
+     */
+    var makePredByNodeName = function (nodeName) {
+      nodeName = nodeName.toUpperCase();
+      return function (node) {
+        return node && node.nodeName.toUpperCase() === nodeName;
+      };
+    };
+
+    /**
+     * @method isText
+     *
+     *
+     *
+     * @param {Node} node
+     * @return {Boolean} true if node's type is text(3)
+     */
+    var isText = function (node) {
+      return node && node.nodeType === 3;
+    };
+
+    /**
+     * @method isElement
+     *
+     *
+     *
+     * @param {Node} node
+     * @return {Boolean} true if node's type is element(1)
+     */
+    var isElement = function (node) {
+      return node && node.nodeType === 1;
+    };
+
+    /**
+     * ex) br, col, embed, hr, img, input, ...
+     * @see http://www.w3.org/html/wg/drafts/html/master/syntax.html#void-elements
+     */
+    var isVoid = function (node) {
+      return node && /^BR|^IMG|^HR|^IFRAME|^BUTTON/.test(node.nodeName.toUpperCase());
+    };
+
+    var isPara = function (node) {
+      if (isEditable(node)) {
+        return false;
+      }
+
+      // Chrome(v31.0), FF(v25.0.1) use DIV for paragraph
+      return node && /^DIV|^P|^LI|^H[1-7]/.test(node.nodeName.toUpperCase());
+    };
+
+    var isHeading = function (node) {
+      return node && /^H[1-7]/.test(node.nodeName.toUpperCase());
+    };
+
+    var isPre = makePredByNodeName('PRE');
+
+    var isLi = makePredByNodeName('LI');
+
+    var isPurePara = function (node) {
+      return isPara(node) && !isLi(node);
+    };
+
+    var isTable = makePredByNodeName('TABLE');
+
+    var isData = makePredByNodeName('DATA');
+
+    var isInline = function (node) {
+      return !isBodyContainer(node) &&
+             !isList(node) &&
+             !isHr(node) &&
+             !isPara(node) &&
+             !isTable(node) &&
+             !isBlockquote(node) &&
+             !isData(node);
+    };
+
+    var isList = function (node) {
+      return node && /^UL|^OL/.test(node.nodeName.toUpperCase());
+    };
+
+    var isHr = makePredByNodeName('HR');
+
+    var isCell = function (node) {
+      return node && /^TD|^TH/.test(node.nodeName.toUpperCase());
+    };
+
+    var isBlockquote = makePredByNodeName('BLOCKQUOTE');
+
+    var isBodyContainer = function (node) {
+      return isCell(node) || isBlockquote(node) || isEditable(node);
+    };
+
+    var isAnchor = makePredByNodeName('A');
+
+    var isParaInline = function (node) {
+      return isInline(node) && !!ancestor(node, isPara);
+    };
+
+    var isBodyInline = function (node) {
+      return isInline(node) && !ancestor(node, isPara);
+    };
+
+    var isBody = makePredByNodeName('BODY');
+
+    /**
+     * returns whether nodeB is closest sibling of nodeA
+     *
+     * @param {Node} nodeA
+     * @param {Node} nodeB
+     * @return {Boolean}
+     */
+    var isClosestSibling = function (nodeA, nodeB) {
+      return nodeA.nextSibling === nodeB ||
+             nodeA.previousSibling === nodeB;
+    };
+
+    /**
+     * returns array of closest siblings with node
+     *
+     * @param {Node} node
+     * @param {function} [pred] - predicate function
+     * @return {Node[]}
+     */
+    var withClosestSiblings = function (node, pred) {
+      pred = pred || func.ok;
+
+      var siblings = [];
+      if (node.previousSibling && pred(node.previousSibling)) {
+        siblings.push(node.previousSibling);
+      }
+      siblings.push(node);
+      if (node.nextSibling && pred(node.nextSibling)) {
+        siblings.push(node.nextSibling);
+      }
+      return siblings;
+    };
+
+    /**
+     * blank HTML for cursor position
+     * - [workaround] old IE only works with &nbsp;
+     * - [workaround] IE11 and other browser works with bogus br
+     */
+    var blankHTML = agent.isMSIE && agent.browserVersion < 11 ? '&nbsp;' : '<br>';
+
+    /**
+     * @method nodeLength
+     *
+     * returns #text's text size or element's childNodes size
+     *
+     * @param {Node} node
+     */
+    var nodeLength = function (node) {
+      if (isText(node)) {
+        return node.nodeValue.length;
+      }
+      
+      if (node) {
+        return node.childNodes.length;
+      }
+      
+      return 0;
+      
+    };
+
+    /**
+     * returns whether node is empty or not.
+     *
+     * @param {Node} node
+     * @return {Boolean}
+     */
+    var isEmpty = function (node) {
+      var len = nodeLength(node);
+
+      if (len === 0) {
+        return true;
+      } else if (!isText(node) && len === 1 && node.innerHTML === blankHTML) {
+        // ex) <p><br></p>, <span><br></span>
+        return true;
+      } else if (list.all(node.childNodes, isText) && node.innerHTML === '') {
+        // ex) <p></p>, <span></span>
+        return true;
+      }
+
+      return false;
+    };
+
+    /**
+     * padding blankHTML if node is empty (for cursor position)
+     */
+    var paddingBlankHTML = function (node) {
+      if (!isVoid(node) && !nodeLength(node)) {
+        node.innerHTML = blankHTML;
+      }
+    };
+
+    /**
+     * find nearest ancestor predicate hit
+     *
+     * @param {Node} node
+     * @param {Function} pred - predicate function
+     */
+    var ancestor = function (node, pred) {
+      while (node) {
+        if (pred(node)) { return node; }
+        if (isEditable(node)) { break; }
+
+        node = node.parentNode;
+      }
+      return null;
+    };
+
+    /**
+     * find nearest ancestor only single child blood line and predicate hit
+     *
+     * @param {Node} node
+     * @param {Function} pred - predicate function
+     */
+    var singleChildAncestor = function (node, pred) {
+      node = node.parentNode;
+
+      while (node) {
+        if (nodeLength(node) !== 1) { break; }
+        if (pred(node)) { return node; }
+        if (isEditable(node)) { break; }
+
+        node = node.parentNode;
+      }
+      return null;
+    };
+
+    /**
+     * returns new array of ancestor nodes (until predicate hit).
+     *
+     * @param {Node} node
+     * @param {Function} [optional] pred - predicate function
+     */
+    var listAncestor = function (node, pred) {
+      pred = pred || func.fail;
+
+      var ancestors = [];
+      ancestor(node, function (el) {
+        if (!isEditable(el)) {
+          ancestors.push(el);
+        }
+
+        return pred(el);
+      });
+      return ancestors;
+    };
+
+    /**
+     * find farthest ancestor predicate hit
+     */
+    var lastAncestor = function (node, pred) {
+      var ancestors = listAncestor(node);
+      return list.last(ancestors.filter(pred));
+    };
+
+    /**
+     * returns common ancestor node between two nodes.
+     *
+     * @param {Node} nodeA
+     * @param {Node} nodeB
+     */
+    var commonAncestor = function (nodeA, nodeB) {
+      var ancestors = listAncestor(nodeA);
+      for (var n = nodeB; n; n = n.parentNode) {
+        if ($.inArray(n, ancestors) > -1) { return n; }
+      }
+      return null; // difference document area
+    };
+
+    /**
+     * listing all previous siblings (until predicate hit).
+     *
+     * @param {Node} node
+     * @param {Function} [optional] pred - predicate function
+     */
+    var listPrev = function (node, pred) {
+      pred = pred || func.fail;
+
+      var nodes = [];
+      while (node) {
+        if (pred(node)) { break; }
+        nodes.push(node);
+        node = node.previousSibling;
+      }
+      return nodes;
+    };
+
+    /**
+     * listing next siblings (until predicate hit).
+     *
+     * @param {Node} node
+     * @param {Function} [pred] - predicate function
+     */
+    var listNext = function (node, pred) {
+      pred = pred || func.fail;
+
+      var nodes = [];
+      while (node) {
+        if (pred(node)) { break; }
+        nodes.push(node);
+        node = node.nextSibling;
+      }
+      return nodes;
+    };
+
+    /**
+     * listing descendant nodes
+     *
+     * @param {Node} node
+     * @param {Function} [pred] - predicate function
+     */
+    var listDescendant = function (node, pred) {
+      var descendants = [];
+      pred = pred || func.ok;
+
+      // start DFS(depth first search) with node
+      (function fnWalk(current) {
+        if (node !== current && pred(current)) {
+          descendants.push(current);
+        }
+        for (var idx = 0, len = current.childNodes.length; idx < len; idx++) {
+          fnWalk(current.childNodes[idx]);
+        }
+      })(node);
+
+      return descendants;
+    };
+
+    /**
+     * wrap node with new tag.
+     *
+     * @param {Node} node
+     * @param {Node} tagName of wrapper
+     * @return {Node} - wrapper
+     */
+    var wrap = function (node, wrapperName) {
+      var parent = node.parentNode;
+      var wrapper = $('<' + wrapperName + '>')[0];
+
+      parent.insertBefore(wrapper, node);
+      wrapper.appendChild(node);
+
+      return wrapper;
+    };
+
+    /**
+     * insert node after preceding
+     *
+     * @param {Node} node
+     * @param {Node} preceding - predicate function
+     */
+    var insertAfter = function (node, preceding) {
+      var next = preceding.nextSibling, parent = preceding.parentNode;
+      if (next) {
+        parent.insertBefore(node, next);
+      } else {
+        parent.appendChild(node);
+      }
+      return node;
+    };
+
+    /**
+     * append elements.
+     *
+     * @param {Node} node
+     * @param {Collection} aChild
+     */
+    var appendChildNodes = function (node, aChild) {
+      $.each(aChild, function (idx, child) {
+        node.appendChild(child);
+      });
+      return node;
+    };
+
+    /**
+     * returns whether boundaryPoint is left edge or not.
+     *
+     * @param {BoundaryPoint} point
+     * @return {Boolean}
+     */
+    var isLeftEdgePoint = function (point) {
+      return point.offset === 0;
+    };
+
+    /**
+     * returns whether boundaryPoint is right edge or not.
+     *
+     * @param {BoundaryPoint} point
+     * @return {Boolean}
+     */
+    var isRightEdgePoint = function (point) {
+      return point.offset === nodeLength(point.node);
+    };
+
+    /**
+     * returns whether boundaryPoint is edge or not.
+     *
+     * @param {BoundaryPoint} point
+     * @return {Boolean}
+     */
+    var isEdgePoint = function (point) {
+      return isLeftEdgePoint(point) || isRightEdgePoint(point);
+    };
+
+    /**
+     * returns whether node is left edge of ancestor or not.
+     *
+     * @param {Node} node
+     * @param {Node} ancestor
+     * @return {Boolean}
+     */
+    var isLeftEdgeOf = function (node, ancestor) {
+      while (node && node !== ancestor) {
+        if (position(node) !== 0) {
+          return false;
+        }
+        node = node.parentNode;
+      }
+
+      return true;
+    };
+
+    /**
+     * returns whether node is right edge of ancestor or not.
+     *
+     * @param {Node} node
+     * @param {Node} ancestor
+     * @return {Boolean}
+     */
+    var isRightEdgeOf = function (node, ancestor) {
+      if (!ancestor) {
+        return false;
+      }
+      while (node && node !== ancestor) {
+        if (position(node) !== nodeLength(node.parentNode) - 1) {
+          return false;
+        }
+        node = node.parentNode;
+      }
+
+      return true;
+    };
+
+    /**
+     * returns whether point is left edge of ancestor or not.
+     * @param {BoundaryPoint} point
+     * @param {Node} ancestor
+     * @return {Boolean}
+     */
+    var isLeftEdgePointOf = function (point, ancestor) {
+      return isLeftEdgePoint(point) && isLeftEdgeOf(point.node, ancestor);
+    };
+
+    /**
+     * returns whether point is right edge of ancestor or not.
+     * @param {BoundaryPoint} point
+     * @param {Node} ancestor
+     * @return {Boolean}
+     */
+    var isRightEdgePointOf = function (point, ancestor) {
+      return isRightEdgePoint(point) && isRightEdgeOf(point.node, ancestor);
+    };
+
+    /**
+     * returns offset from parent.
+     *
+     * @param {Node} node
+     */
+    var position = function (node) {
+      var offset = 0;
+      while ((node = node.previousSibling)) {
+        offset += 1;
+      }
+      return offset;
+    };
+
+    var hasChildren = function (node) {
+      return !!(node && node.childNodes && node.childNodes.length);
+    };
+
+    /**
+     * returns previous boundaryPoint
+     *
+     * @param {BoundaryPoint} point
+     * @param {Boolean} isSkipInnerOffset
+     * @return {BoundaryPoint}
+     */
+    var prevPoint = function (point, isSkipInnerOffset) {
+      var node, offset;
+
+      if (point.offset === 0) {
+        if (isEditable(point.node)) {
+          return null;
+        }
+
+        node = point.node.parentNode;
+        offset = position(point.node);
+      } else if (hasChildren(point.node)) {
+        node = point.node.childNodes[point.offset - 1];
+        offset = nodeLength(node);
+      } else {
+        node = point.node;
+        offset = isSkipInnerOffset ? 0 : point.offset - 1;
+      }
+
+      return {
+        node: node,
+        offset: offset
+      };
+    };
+
+    /**
+     * returns next boundaryPoint
+     *
+     * @param {BoundaryPoint} point
+     * @param {Boolean} isSkipInnerOffset
+     * @return {BoundaryPoint}
+     */
+    var nextPoint = function (point, isSkipInnerOffset) {
+      var node, offset;
+
+      if (nodeLength(point.node) === point.offset) {
+        if (isEditable(point.node)) {
+          return null;
+        }
+
+        node = point.node.parentNode;
+        offset = position(point.node) + 1;
+      } else if (hasChildren(point.node)) {
+        node = point.node.childNodes[point.offset];
+        offset = 0;
+      } else {
+        node = point.node;
+        offset = isSkipInnerOffset ? nodeLength(point.node) : point.offset + 1;
+      }
+
+      return {
+        node: node,
+        offset: offset
+      };
+    };
+
+    /**
+     * returns whether pointA and pointB is same or not.
+     *
+     * @param {BoundaryPoint} pointA
+     * @param {BoundaryPoint} pointB
+     * @return {Boolean}
+     */
+    var isSamePoint = function (pointA, pointB) {
+      return pointA.node === pointB.node && pointA.offset === pointB.offset;
+    };
+
+    /**
+     * returns whether point is visible (can set cursor) or not.
+     *
+     * @param {BoundaryPoint} point
+     * @return {Boolean}
+     */
+    var isVisiblePoint = function (point) {
+      if (isText(point.node) || !hasChildren(point.node) || isEmpty(point.node)) {
+        return true;
+      }
+
+      var leftNode = point.node.childNodes[point.offset - 1];
+      var rightNode = point.node.childNodes[point.offset];
+      if ((!leftNode || isVoid(leftNode)) && (!rightNode || isVoid(rightNode))) {
+        return true;
+      }
+
+      return false;
+    };
+
+    /**
+     * @method prevPointUtil
+     *
+     * @param {BoundaryPoint} point
+     * @param {Function} pred
+     * @return {BoundaryPoint}
+     */
+    var prevPointUntil = function (point, pred) {
+      while (point) {
+        if (pred(point)) {
+          return point;
+        }
+
+        point = prevPoint(point);
+      }
+
+      return null;
+    };
+
+    /**
+     * @method nextPointUntil
+     *
+     * @param {BoundaryPoint} point
+     * @param {Function} pred
+     * @return {BoundaryPoint}
+     */
+    var nextPointUntil = function (point, pred) {
+      while (point) {
+        if (pred(point)) {
+          return point;
+        }
+
+        point = nextPoint(point);
+      }
+
+      return null;
+    };
+
+    /**
+     * returns whether point has character or not.
+     *
+     * @param {Point} point
+     * @return {Boolean}
+     */
+    var isCharPoint = function (point) {
+      if (!isText(point.node)) {
+        return false;
+      }
+
+      var ch = point.node.nodeValue.charAt(point.offset - 1);
+      return ch && (ch !== ' ' && ch !== NBSP_CHAR);
+    };
+
+    /**
+     * @method walkPoint
+     *
+     * @param {BoundaryPoint} startPoint
+     * @param {BoundaryPoint} endPoint
+     * @param {Function} handler
+     * @param {Boolean} isSkipInnerOffset
+     */
+    var walkPoint = function (startPoint, endPoint, handler, isSkipInnerOffset) {
+      var point = startPoint;
+
+      while (point) {
+        handler(point);
+
+        if (isSamePoint(point, endPoint)) {
+          break;
+        }
+
+        var isSkipOffset = isSkipInnerOffset &&
+                           startPoint.node !== point.node &&
+                           endPoint.node !== point.node;
+        point = nextPoint(point, isSkipOffset);
+      }
+    };
+
+    /**
+     * @method makeOffsetPath
+     *
+     * return offsetPath(array of offset) from ancestor
+     *
+     * @param {Node} ancestor - ancestor node
+     * @param {Node} node
+     */
+    var makeOffsetPath = function (ancestor, node) {
+      var ancestors = listAncestor(node, func.eq(ancestor));
+      return ancestors.map(position).reverse();
+    };
+
+    /**
+     * @method fromOffsetPath
+     *
+     * return element from offsetPath(array of offset)
+     *
+     * @param {Node} ancestor - ancestor node
+     * @param {array} offsets - offsetPath
+     */
+    var fromOffsetPath = function (ancestor, offsets) {
+      var current = ancestor;
+      for (var i = 0, len = offsets.length; i < len; i++) {
+        if (current.childNodes.length <= offsets[i]) {
+          current = current.childNodes[current.childNodes.length - 1];
+        } else {
+          current = current.childNodes[offsets[i]];
+        }
+      }
+      return current;
+    };
+
+    /**
+     * @method splitNode
+     *
+     * split element or #text
+     *
+     * @param {BoundaryPoint} point
+     * @param {Object} [options]
+     * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
+     * @param {Boolean} [options.isNotSplitEdgePoint] - default: false
+     * @return {Node} right node of boundaryPoint
+     */
+    var splitNode = function (point, options) {
+      var isSkipPaddingBlankHTML = options && options.isSkipPaddingBlankHTML;
+      var isNotSplitEdgePoint = options && options.isNotSplitEdgePoint;
+
+      // edge case
+      if (isEdgePoint(point) && (isText(point.node) || isNotSplitEdgePoint)) {
+        if (isLeftEdgePoint(point)) {
+          return point.node;
+        } else if (isRightEdgePoint(point)) {
+          return point.node.nextSibling;
+        }
+      }
+
+      // split #text
+      if (isText(point.node)) {
+        return point.node.splitText(point.offset);
+      } else {
+        var childNode = point.node.childNodes[point.offset];
+        var clone = insertAfter(point.node.cloneNode(false), point.node);
+        appendChildNodes(clone, listNext(childNode));
+
+        if (!isSkipPaddingBlankHTML) {
+          paddingBlankHTML(point.node);
+          paddingBlankHTML(clone);
+        }
+
+        return clone;
+      }
+    };
+
+    /**
+     * @method splitTree
+     *
+     * split tree by point
+     *
+     * @param {Node} root - split root
+     * @param {BoundaryPoint} point
+     * @param {Object} [options]
+     * @param {Boolean} [options.isSkipPaddingBlankHTML] - default: false
+     * @param {Boolean} [options.isNotSplitEdgePoint] - default: false
+     * @return {Node} right node of boundaryPoint
+     */
+    var splitTree = function (root, point, options) {
+      // ex) [#text, <span>, <p>]
+      var ancestors = listAncestor(point.node, func.eq(root));
+
+      if (!ancestors.length) {
+        return null;
+      } else if (ancestors.length === 1) {
+        return splitNode(point, options);
+      }
+
+      return ancestors.reduce(function (node, parent) {
+        if (node === point.node) {
+          node = splitNode(point, options);
+        }
+
+        return splitNode({
+          node: parent,
+          offset: node ? dom.position(node) : nodeLength(parent)
+        }, options);
+      });
+    };
+
+    /**
+     * split point
+     *
+     * @param {Point} point
+     * @param {Boolean} isInline
+     * @return {Object}
+     */
+    var splitPoint = function (point, isInline) {
+      // find splitRoot, container
+      //  - inline: splitRoot is a child of paragraph
+      //  - block: splitRoot is a child of bodyContainer
+      var pred = isInline ? isPara : isBodyContainer;
+      var ancestors = listAncestor(point.node, pred);
+      var topAncestor = list.last(ancestors) || point.node;
+
+      var splitRoot, container;
+      if (pred(topAncestor)) {
+        splitRoot = ancestors[ancestors.length - 2];
+        container = topAncestor;
+      } else {
+        splitRoot = topAncestor;
+        container = splitRoot.parentNode;
+      }
+
+      // if splitRoot is exists, split with splitTree
+      var pivot = splitRoot && splitTree(splitRoot, point, {
+        isSkipPaddingBlankHTML: isInline,
+        isNotSplitEdgePoint: isInline
+      });
+
+      // if container is point.node, find pivot with point.offset
+      if (!pivot && container === point.node) {
+        pivot = point.node.childNodes[point.offset];
+      }
+
+      return {
+        rightNode: pivot,
+        container: container
+      };
+    };
+
+    var create = function (nodeName) {
+      return document.createElement(nodeName);
+    };
+
+    var createText = function (text) {
+      return document.createTextNode(text);
+    };
+
+    /**
+     * @method remove
+     *
+     * remove node, (isRemoveChild: remove child or not)
+     *
+     * @param {Node} node
+     * @param {Boolean} isRemoveChild
+     */
+    var remove = function (node, isRemoveChild) {
+      if (!node || !node.parentNode) { return; }
+      if (node.removeNode) { return node.removeNode(isRemoveChild); }
+
+      var parent = node.parentNode;
+      if (!isRemoveChild) {
+        var nodes = [];
+        var i, len;
+        for (i = 0, len = node.childNodes.length; i < len; i++) {
+          nodes.push(node.childNodes[i]);
+        }
+
+        for (i = 0, len = nodes.length; i < len; i++) {
+          parent.insertBefore(nodes[i], node);
+        }
+      }
+
+      parent.removeChild(node);
+    };
+
+    /**
+     * @method removeWhile
+     *
+     * @param {Node} node
+     * @param {Function} pred
+     */
+    var removeWhile = function (node, pred) {
+      while (node) {
+        if (isEditable(node) || !pred(node)) {
+          break;
+        }
+
+        var parent = node.parentNode;
+        remove(node);
+        node = parent;
+      }
+    };
+
+    /**
+     * @method replace
+     *
+     * replace node with provided nodeName
+     *
+     * @param {Node} node
+     * @param {String} nodeName
+     * @return {Node} - new node
+     */
+    var replace = function (node, nodeName) {
+      if (node.nodeName.toUpperCase() === nodeName.toUpperCase()) {
+        return node;
+      }
+
+      var newNode = create(nodeName);
+
+      if (node.style.cssText) {
+        newNode.style.cssText = node.style.cssText;
+      }
+
+      appendChildNodes(newNode, list.from(node.childNodes));
+      insertAfter(newNode, node);
+      remove(node);
+
+      return newNode;
+    };
+
+    var isTextarea = makePredByNodeName('TEXTAREA');
+
+    /**
+     * @param {jQuery} $node
+     * @param {Boolean} [stripLinebreaks] - default: false
+     */
+    var value = function ($node, stripLinebreaks) {
+      var val = isTextarea($node[0]) ? $node.val() : $node.html();
+      if (stripLinebreaks) {
+        return val.replace(/[\n\r]/g, '');
+      }
+      return val;
+    };
+
+    /**
+     * @method html
+     *
+     * get the HTML contents of node
+     *
+     * @param {jQuery} $node
+     * @param {Boolean} [isNewlineOnBlock]
+     */
+    var html = function ($node, isNewlineOnBlock) {
+      var markup = value($node);
+
+      if (isNewlineOnBlock) {
+        var regexTag = /<(\/?)(\b(?!!)[^>\s]*)(.*?)(\s*\/?>)/g;
+        markup = markup.replace(regexTag, function (match, endSlash, name) {
+          name = name.toUpperCase();
+          var isEndOfInlineContainer = /^DIV|^TD|^TH|^P|^LI|^H[1-7]/.test(name) &&
+                                       !!endSlash;
+          var isBlockNode = /^BLOCKQUOTE|^TABLE|^TBODY|^TR|^HR|^UL|^OL/.test(name);
+
+          return match + ((isEndOfInlineContainer || isBlockNode) ? '\n' : '');
+        });
+        markup = $.trim(markup);
+      }
+
+      return markup;
+    };
+
+    var posFromPlaceholder = function (placeholder) {
+      var $placeholder = $(placeholder);
+      var pos = $placeholder.offset();
+      var height = $placeholder.outerHeight(true); // include margin
+
+      return {
+        left: pos.left,
+        top: pos.top + height
+      };
+    };
+
+    var attachEvents = function ($node, events) {
+      Object.keys(events).forEach(function (key) {
+        $node.on(key, events[key]);
+      });
+    };
+
+    var detachEvents = function ($node, events) {
+      Object.keys(events).forEach(function (key) {
+        $node.off(key, events[key]);
+      });
+    };
+
+    return {
+      /** @property {String} NBSP_CHAR */
+      NBSP_CHAR: NBSP_CHAR,
+      /** @property {String} ZERO_WIDTH_NBSP_CHAR */
+      ZERO_WIDTH_NBSP_CHAR: ZERO_WIDTH_NBSP_CHAR,
+      /** @property {String} blank */
+      blank: blankHTML,
+      /** @property {String} emptyPara */
+      emptyPara: '<p>' + blankHTML + '</p>',
+      makePredByNodeName: makePredByNodeName,
+      isEditable: isEditable,
+      isControlSizing: isControlSizing,
+      isText: isText,
+      isElement: isElement,
+      isVoid: isVoid,
+      isPara: isPara,
+      isPurePara: isPurePara,
+      isHeading: isHeading,
+      isInline: isInline,
+      isBlock: func.not(isInline),
+      isBodyInline: isBodyInline,
+      isBody: isBody,
+      isParaInline: isParaInline,
+      isPre: isPre,
+      isList: isList,
+      isTable: isTable,
+      isData: isData,
+      isCell: isCell,
+      isBlockquote: isBlockquote,
+      isBodyContainer: isBodyContainer,
+      isAnchor: isAnchor,
+      isDiv: makePredByNodeName('DIV'),
+      isLi: isLi,
+      isBR: makePredByNodeName('BR'),
+      isSpan: makePredByNodeName('SPAN'),
+      isB: makePredByNodeName('B'),
+      isU: makePredByNodeName('U'),
+      isS: makePredByNodeName('S'),
+      isI: makePredByNodeName('I'),
+      isImg: makePredByNodeName('IMG'),
+      isTextarea: isTextarea,
+      isEmpty: isEmpty,
+      isEmptyAnchor: func.and(isAnchor, isEmpty),
+      isClosestSibling: isClosestSibling,
+      withClosestSiblings: withClosestSiblings,
+      nodeLength: nodeLength,
+      isLeftEdgePoint: isLeftEdgePoint,
+      isRightEdgePoint: isRightEdgePoint,
+      isEdgePoint: isEdgePoint,
+      isLeftEdgeOf: isLeftEdgeOf,
+      isRightEdgeOf: isRightEdgeOf,
+      isLeftEdgePointOf: isLeftEdgePointOf,
+      isRightEdgePointOf: isRightEdgePointOf,
+      prevPoint: prevPoint,
+      nextPoint: nextPoint,
+      isSamePoint: isSamePoint,
+      isVisiblePoint: isVisiblePoint,
+      prevPointUntil: prevPointUntil,
+      nextPointUntil: nextPointUntil,
+      isCharPoint: isCharPoint,
+      walkPoint: walkPoint,
+      ancestor: ancestor,
+      singleChildAncestor: singleChildAncestor,
+      listAncestor: listAncestor,
+      lastAncestor: lastAncestor,
+      listNext: listNext,
+      listPrev: listPrev,
+      listDescendant: listDescendant,
+      commonAncestor: commonAncestor,
+      wrap: wrap,
+      insertAfter: insertAfter,
+      appendChildNodes: appendChildNodes,
+      position: position,
+      hasChildren: hasChildren,
+      makeOffsetPath: makeOffsetPath,
+      fromOffsetPath: fromOffsetPath,
+      splitTree: splitTree,
+      splitPoint: splitPoint,
+      create: create,
+      createText: createText,
+      remove: remove,
+      removeWhile: removeWhile,
+      replace: replace,
+      html: html,
+      value: value,
+      posFromPlaceholder: posFromPlaceholder,
+      attachEvents: attachEvents,
+      detachEvents: detachEvents
+    };
+  })();
+
+  /**
+   * @param {jQuery} $note
+   * @param {Object} options
+   * @return {Context}
+   */
+  var Context = function ($note, options) {
+    var self = this;
+
+    var ui = $.summernote.ui;
+    this.memos = {};
+    this.modules = {};
+    this.layoutInfo = {};
+    this.options = options;
+
+    /**
+     * create layout and initialize modules and other resources
+     */
+    this.initialize = function () {
+      this.layoutInfo = ui.createLayout($note, options);
+      this._initialize();
+      $note.hide();
+      return this;
+    };
+
+    /**
+     * destroy modules and other resources and remove layout
+     */
+    this.destroy = function () {
+      this._destroy();
+      $note.removeData('summernote');
+      ui.removeLayout($note, this.layoutInfo);
+    };
+
+    /**
+     * destory modules and other resources and initialize it again
+     */
+    this.reset = function () {
+      var disabled = self.isDisabled();
+      this.code(dom.emptyPara);
+      this._destroy();
+      this._initialize();
+
+      if (disabled) {
+        self.disable();
+      }
+    };
+
+    this._initialize = function () {
+      // add optional buttons
+      var buttons = $.extend({}, this.options.buttons);
+      Object.keys(buttons).forEach(function (key) {
+        self.memo('button.' + key, buttons[key]);
+      });
+
+      var modules = $.extend({}, this.options.modules, $.summernote.plugins || {});
+
+      // add and initialize modules
+      Object.keys(modules).forEach(function (key) {
+        self.module(key, modules[key], true);
+      });
+
+      Object.keys(this.modules).forEach(function (key) {
+        self.initializeModule(key);
+      });
+    };
+
+    this._destroy = function () {
+      // destroy modules with reversed order
+      Object.keys(this.modules).reverse().forEach(function (key) {
+        self.removeModule(key);
+      });
+
+      Object.keys(this.memos).forEach(function (key) {
+        self.removeMemo(key);
+      });
+    };
+
+    this.code = function (html) {
+      var isActivated = this.invoke('codeview.isActivated');
+
+      if (html === undefined) {
+        this.invoke('codeview.sync');
+        return isActivated ? this.layoutInfo.codable.val() : this.layoutInfo.editable.html();
+      } else {
+        if (isActivated) {
+          this.layoutInfo.codable.val(html);
+        } else {
+          this.layoutInfo.editable.html(html);
+        }
+        $note.val(html);
+        this.triggerEvent('change', html);
+      }
+    };
+
+    this.isDisabled = function () {
+      return this.layoutInfo.editable.attr('contenteditable') === 'false';
+    };
+
+    this.enable = function () {
+      this.layoutInfo.editable.attr('contenteditable', true);
+      this.invoke('toolbar.activate', true);
+    };
+
+    this.disable = function () {
+      // close codeview if codeview is opend
+      if (this.invoke('codeview.isActivated')) {
+        this.invoke('codeview.deactivate');
+      }
+      this.layoutInfo.editable.attr('contenteditable', false);
+      this.invoke('toolbar.deactivate', true);
+    };
+
+    this.triggerEvent = function () {
+      var namespace = list.head(arguments);
+      var args = list.tail(list.from(arguments));
+
+      var callback = this.options.callbacks[func.namespaceToCamel(namespace, 'on')];
+      if (callback) {
+        callback.apply($note[0], args);
+      }
+      $note.trigger('summernote.' + namespace, args);
+    };
+
+    this.initializeModule = function (key) {
+      var module = this.modules[key];
+      module.shouldInitialize = module.shouldInitialize || func.ok;
+      if (!module.shouldInitialize()) {
+        return;
+      }
+
+      // initialize module
+      if (module.initialize) {
+        module.initialize();
+      }
+
+      // attach events
+      if (module.events) {
+        dom.attachEvents($note, module.events);
+      }
+    };
+
+    this.module = function (key, ModuleClass, withoutIntialize) {
+      if (arguments.length === 1) {
+        return this.modules[key];
+      }
+
+      this.modules[key] = new ModuleClass(this);
+
+      if (!withoutIntialize) {
+        this.initializeModule(key);
+      }
+    };
+
+    this.removeModule = function (key) {
+      var module = this.modules[key];
+      if (module.shouldInitialize()) {
+        if (module.events) {
+          dom.detachEvents($note, module.events);
+        }
+
+        if (module.destroy) {
+          module.destroy();
+        }
+      }
+
+      delete this.modules[key];
+    };
+
+    this.memo = function (key, obj) {
+      if (arguments.length === 1) {
+        return this.memos[key];
+      }
+      this.memos[key] = obj;
+    };
+
+    this.removeMemo = function (key) {
+      if (this.memos[key] && this.memos[key].destroy) {
+        this.memos[key].destroy();
+      }
+
+      delete this.memos[key];
+    };
+
+    this.createInvokeHandler = function (namespace, value) {
+      return function (event) {
+        event.preventDefault();
+        self.invoke(namespace, value || $(event.target).closest('[data-value]').data('value'));
+      };
+    };
+
+    this.invoke = function () {
+      var namespace = list.head(arguments);
+      var args = list.tail(list.from(arguments));
+
+      var splits = namespace.split('.');
+      var hasSeparator = splits.length > 1;
+      var moduleName = hasSeparator && list.head(splits);
+      var methodName = hasSeparator ? list.last(splits) : list.head(splits);
+
+      var module = this.modules[moduleName || 'editor'];
+      if (!moduleName && this[methodName]) {
+        return this[methodName].apply(this, args);
+      } else if (module && module[methodName] && module.shouldInitialize()) {
+        return module[methodName].apply(module, args);
+      }
+    };
+
+    return this.initialize();
+  };
+
+  $.fn.extend({
+    /**
+     * Summernote API
+     *
+     * @param {Object|String}
+     * @return {this}
+     */
+    summernote: function () {
+      var type = $.type(list.head(arguments));
+      var isExternalAPICalled = type === 'string';
+      var hasInitOptions = type === 'object';
+
+      var options = hasInitOptions ? list.head(arguments) : {};
+
+      options = $.extend({}, $.summernote.options, options);
+      options.langInfo = $.extend(true, {}, $.summernote.lang['en-US'], $.summernote.lang[options.lang]);
+      options.icons = $.extend(true, {}, $.summernote.options.icons, options.icons);
+
+      this.each(function (idx, note) {
+        var $note = $(note);
+        if (!$note.data('summernote')) {
+          var context = new Context($note, options);
+          $note.data('summernote', context);
+          $note.data('summernote').triggerEvent('init', context.layoutInfo);
+        }
+      });
+
+      var $note = this.first();
+      if ($note.length) {
+        var context = $note.data('summernote');
+        if (isExternalAPICalled) {
+          return context.invoke.apply(context, list.from(arguments));
+        } else if (options.focus) {
+          context.invoke('editor.focus');
+        }
+      }
+
+      return this;
+    }
+  });
+
+
+  var Renderer = function (markup, children, options, callback) {
+    this.render = function ($parent) {
+      var $node = $(markup);
+
+      if (options && options.contents) {
+        $node.html(options.contents);
+      }
+
+      if (options && options.className) {
+        $node.addClass(options.className);
+      }
+
+      if (options && options.data) {
+        $.each(options.data, function (k, v) {
+          $node.attr('data-' + k, v);
+        });
+      }
+
+      if (options && options.click) {
+        $node.on('click', options.click);
+      }
+
+      if (children) {
+        var $container = $node.find('.note-children-container');
+        children.forEach(function (child) {
+          child.render($container.length ? $container : $node);
+        });
+      }
+
+      if (callback) {
+        callback($node, options);
+      }
+
+      if (options && options.callback) {
+        options.callback($node);
+      }
+
+      if ($parent) {
+        $parent.append($node);
+      }
+
+      return $node;
+    };
+  };
+
+  var renderer = {
+    create: function (markup, callback) {
+      return function () {
+        var children = $.isArray(arguments[0]) ? arguments[0] : [];
+        var options = typeof arguments[1] === 'object' ? arguments[1] : arguments[0];
+        if (options && options.children) {
+          children = options.children;
+        }
+        return new Renderer(markup, children, options, callback);
+      };
+    }
+  };
+
+  var editor = renderer.create('<div class="note-editor note-frame panel panel-default"/>');
+  var toolbar = renderer.create('<div class="note-toolbar panel-heading"/>');
+  var editingArea = renderer.create('<div class="note-editing-area"/>');
+  var codable = renderer.create('<textarea class="note-codable"/>');
+  var editable = renderer.create('<div class="note-editable panel-body" contentEditable="true"/>');
+  var statusbar = renderer.create([
+    '<div class="note-statusbar">',
+    '  <div class="note-resizebar">',
+    '    <div class="note-icon-bar"/>',
+    '    <div class="note-icon-bar"/>',
+    '    <div class="note-icon-bar"/>',
+    '  </div>',
+    '</div>'
+  ].join(''));
+
+  var airEditor = renderer.create('<div class="note-editor"/>');
+  var airEditable = renderer.create('<div class="note-editable" contentEditable="true"/>');
+
+  var buttonGroup = renderer.create('<div class="note-btn-group btn-group">');
+  var button = renderer.create('<button type="button" class="note-btn btn btn-default btn-sm" tabindex="-1">', function ($node, options) {
+    if (options && options.tooltip) {
+      $node.attr({
+        title: options.tooltip
+      }).tooltip({
+        container: 'body',
+        trigger: 'hover',
+        placement: 'bottom'
+      });
+    }
+  });
+
+  var dropdown = renderer.create('<div class="dropdown-menu">', function ($node, options) {
+    var markup = $.isArray(options.items) ? options.items.map(function (item) {
+      var value = (typeof item === 'string') ? item : (item.value || '');
+      var content = options.template ? options.template(item) : item;
+      return '<li><a href="#" data-value="' + value + '">' + content + '</a></li>';
+    }).join('') : options.items;
+
+    $node.html(markup);
+  });
+
+  var dropdownCheck = renderer.create('<div class="dropdown-menu note-check">', function ($node, options) {
+    var markup = $.isArray(options.items) ? options.items.map(function (item) {
+      var value = (typeof item === 'string') ? item : (item.value || '');
+      var content = options.template ? options.template(item) : item;
+      return '<li><a href="#" data-value="' + value + '">' + icon(options.checkClassName) + ' ' + content + '</a></li>';
+    }).join('') : options.items;
+    $node.html(markup);
+  });
+
+  var palette = renderer.create('<div class="note-color-palette"/>', function ($node, options) {
+    var contents = [];
+    for (var row = 0, rowSize = options.colors.length; row < rowSize; row++) {
+      var eventName = options.eventName;
+      var colors = options.colors[row];
+      var buttons = [];
+      for (var col = 0, colSize = colors.length; col < colSize; col++) {
+        var color = colors[col];
+        buttons.push([
+          '<button type="button" class="note-color-btn"',
+          'style="background-color:', color, '" ',
+          'data-event="', eventName, '" ',
+          'data-value="', color, '" ',
+          'title="', color, '" ',
+          'data-toggle="button" tabindex="-1"></button>'
+        ].join(''));
+      }
+      contents.push('<div class="note-color-row">' + buttons.join('') + '</div>');
+    }
+    $node.html(contents.join(''));
+
+    $node.find('.note-color-btn').tooltip({
+      container: 'body',
+      trigger: 'hover',
+      placement: 'bottom'
+    });
+  });
+
+  var dialog = renderer.create('<div class="modal" aria-hidden="false" tabindex="-1"/>', function ($node, options) {
+    if (options.fade) {
+      $node.addClass('fade');
+    }
+    $node.html([
+      '<div class="modal-dialog">',
+      '  <div class="modal-content">',
+      (options.title ?
+      '    <div class="modal-header">' +
+      '      <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>' +
+      '      <h4 class="modal-title">' + options.title + '</h4>' +
+      '    </div>' : ''
+      ),
+      '    <div class="modal-body">' + options.body + '</div>',
+      (options.footer ?
+      '    <div class="modal-footer">' + options.footer + '</div>' : ''
+      ),
+      '  </div>',
+      '</div>'
+    ].join(''));
+  });
+
+  var popover = renderer.create([
+    '<div class="note-popover popover in">',
+    '  <div class="arrow"/>',
+    '  <div class="popover-content note-children-container"/>',
+    '</div>'
+  ].join(''), function ($node, options) {
+    var direction = typeof options.direction !== 'undefined' ? options.direction : 'bottom';
+
+    $node.addClass(direction);
+
+    if (options.hideArrow) {
+      $node.find('.arrow').hide();
+    }
+  });
+
+  var icon = function (iconClassName, tagName) {
+    tagName = tagName || 'i';
+    return '<' + tagName + ' class="' + iconClassName + '"/>';
+  };
+
+  var ui = {
+    editor: editor,
+    toolbar: toolbar,
+    editingArea: editingArea,
+    codable: codable,
+    editable: editable,
+    statusbar: statusbar,
+    airEditor: airEditor,
+    airEditable: airEditable,
+    buttonGroup: buttonGroup,
+    button: button,
+    dropdown: dropdown,
+    dropdownCheck: dropdownCheck,
+    palette: palette,
+    dialog: dialog,
+    popover: popover,
+    icon: icon,
+
+    toggleBtn: function ($btn, isEnable) {
+      $btn.toggleClass('disabled', !isEnable);
+      $btn.attr('disabled', !isEnable);
+    },
+
+    toggleBtnActive: function ($btn, isActive) {
+      $btn.toggleClass('active', isActive);
+    },
+
+    onDialogShown: function ($dialog, handler) {
+      $dialog.one('shown.bs.modal', handler);
+    },
+
+    onDialogHidden: function ($dialog, handler) {
+      $dialog.one('hidden.bs.modal', handler);
+    },
+
+    showDialog: function ($dialog) {
+      $dialog.modal('show');
+    },
+
+    hideDialog: function ($dialog) {
+      $dialog.modal('hide');
+    },
+
+    createLayout: function ($note, options) {
+      var $editor = (options.airMode ? ui.airEditor([
+        ui.editingArea([
+          ui.airEditable()
+        ])
+      ]) : ui.editor([
+        ui.toolbar(),
+        ui.editingArea([
+          ui.codable(),
+          ui.editable()
+        ]),
+        ui.statusbar()
+      ])).render();
+
+      $editor.insertAfter($note);
+
+      return {
+        note: $note,
+        editor: $editor,
+        toolbar: $editor.find('.note-toolbar'),
+        editingArea: $editor.find('.note-editing-area'),
+        editable: $editor.find('.note-editable'),
+        codable: $editor.find('.note-codable'),
+        statusbar: $editor.find('.note-statusbar')
+      };
+    },
+
+    removeLayout: function ($note, layoutInfo) {
+      $note.html(layoutInfo.editable.html());
+      layoutInfo.editor.remove();
+      $note.show();
+    }
+  };
+
+  $.summernote = $.summernote || {
+    lang: {}
+  };
+
+  $.extend($.summernote.lang, {
+    'en-US': {
+      font: {
+        bold: 'Bold',
+        italic: 'Italic',
+        underline: 'Underline',
+        clear: 'Remove Font Style',
+        height: 'Line Height',
+        name: 'Font Family',
+        strikethrough: 'Strikethrough',
+        subscript: 'Subscript',
+        superscript: 'Superscript',
+        size: 'Font Size'
+      },
+      image: {
+        image: 'Picture',
+        insert: 'Insert Image',
+        resizeFull: 'Resize Full',
+        resizeHalf: 'Resize Half',
+        resizeQuarter: 'Resize Quarter',
+        floatLeft: 'Float Left',
+        floatRight: 'Float Right',
+        floatNone: 'Float None',
+        shapeRounded: 'Shape: Rounded',
+        shapeCircle: 'Shape: Circle',
+        shapeThumbnail: 'Shape: Thumbnail',
+        shapeNone: 'Shape: None',
+        dragImageHere: 'Drag image or text here',
+        dropImage: 'Drop image or Text',
+        selectFromFiles: 'Select from files',
+        maximumFileSize: 'Maximum file size',
+        maximumFileSizeError: 'Maximum file size exceeded.',
+        url: 'Image URL',
+        remove: 'Remove Image'
+      },
+      video: {
+        video: 'Video',
+        videoLink: 'Video Link',
+        insert: 'Insert Video',
+        url: 'Video URL?',
+        providers: '(YouTube, Vimeo, Vine, Instagram, DailyMotion or Youku)'
+      },
+      link: {
+        link: 'Link',
+        insert: 'Insert Link',
+        unlink: 'Unlink',
+        edit: 'Edit',
+        textToDisplay: 'Text to display',
+        url: 'To what URL should this link go?',
+        openInNewWindow: 'Open in new window'
+      },
+      table: {
+        table: 'Table'
+      },
+      hr: {
+        insert: 'Insert Horizontal Rule'
+      },
+      style: {
+        style: 'Style',
+        normal: 'Normal',
+        blockquote: 'Quote',
+        pre: 'Code',
+        h1: 'Header 1',
+        h2: 'Header 2',
+        h3: 'Header 3',
+        h4: 'Header 4',
+        h5: 'Header 5',
+        h6: 'Header 6'
+      },
+      lists: {
+        unordered: 'Unordered list',
+        ordered: 'Ordered list'
+      },
+      options: {
+        help: 'Help',
+        fullscreen: 'Full Screen',
+        codeview: 'Code View'
+      },
+      paragraph: {
+        paragraph: 'Paragraph',
+        outdent: 'Outdent',
+        indent: 'Indent',
+        left: 'Align left',
+        center: 'Align center',
+        right: 'Align right',
+        justify: 'Justify full'
+      },
+      color: {
+        recent: 'Recent Color',
+        more: 'More Color',
+        background: 'Background Color',
+        foreground: 'Foreground Color',
+        transparent: 'Transparent',
+        setTransparent: 'Set transparent',
+        reset: 'Reset',
+        resetToDefault: 'Reset to default'
+      },
+      shortcut: {
+        shortcuts: 'Keyboard shortcuts',
+        close: 'Close',
+        textFormatting: 'Text formatting',
+        action: 'Action',
+        paragraphFormatting: 'Paragraph formatting',
+        documentStyle: 'Document Style',
+        extraKeys: 'Extra keys'
+      },
+      help: {
+        'insertParagraph': 'Insert Paragraph',
+        'undo': 'Undoes the last command',
+        'redo': 'Redoes the last command',
+        'tab': 'Tab',
+        'untab': 'Untab',
+        'bold': 'Set a bold style',
+        'italic': 'Set a italic style',
+        'underline': 'Set a underline style',
+        'strikethrough': 'Set a strikethrough style',
+        'removeFormat': 'Clean a style',
+        'justifyLeft': 'Set left align',
+        'justifyCenter': 'Set center align',
+        'justifyRight': 'Set right align',
+        'justifyFull': 'Set full align',
+        'insertUnorderedList': 'Toggle unordered list',
+        'insertOrderedList': 'Toggle ordered list',
+        'outdent': 'Outdent on current paragraph',
+        'indent': 'Indent on current paragraph',
+        'formatPara': 'Change current block\'s format as a paragraph(P tag)',
+        'formatH1': 'Change current block\'s format as H1',
+        'formatH2': 'Change current block\'s format as H2',
+        'formatH3': 'Change current block\'s format as H3',
+        'formatH4': 'Change current block\'s format as H4',
+        'formatH5': 'Change current block\'s format as H5',
+        'formatH6': 'Change current block\'s format as H6',
+        'insertHorizontalRule': 'Insert horizontal rule',
+        'linkDialog.show': 'Show Link Dialog'
+      },
+      history: {
+        undo: 'Undo',
+        redo: 'Redo'
+      },
+      specialChar: {
+        specialChar: 'SPECIAL CHARACTERS',
+        select: 'Select Special characters'
+      }
+    }
+  });
+
+
+  /**
+   * @class core.key
+   *
+   * Object for keycodes.
+   *
+   * @singleton
+   * @alternateClassName key
+   */
+  var key = (function () {
+    var keyMap = {
+      'BACKSPACE': 8,
+      'TAB': 9,
+      'ENTER': 13,
+      'SPACE': 32,
+
+      // Arrow
+      'LEFT': 37,
+      'UP': 38,
+      'RIGHT': 39,
+      'DOWN': 40,
+
+      // Number: 0-9
+      'NUM0': 48,
+      'NUM1': 49,
+      'NUM2': 50,
+      'NUM3': 51,
+      'NUM4': 52,
+      'NUM5': 53,
+      'NUM6': 54,
+      'NUM7': 55,
+      'NUM8': 56,
+
+      // Alphabet: a-z
+      'B': 66,
+      'E': 69,
+      'I': 73,
+      'J': 74,
+      'K': 75,
+      'L': 76,
+      'R': 82,
+      'S': 83,
+      'U': 85,
+      'V': 86,
+      'Y': 89,
+      'Z': 90,
+
+      'SLASH': 191,
+      'LEFTBRACKET': 219,
+      'BACKSLASH': 220,
+      'RIGHTBRACKET': 221
+    };
+
+    return {
+      /**
+       * @method isEdit
+       *
+       * @param {Number} keyCode
+       * @return {Boolean}
+       */
+      isEdit: function (keyCode) {
+        return list.contains([
+          keyMap.BACKSPACE,
+          keyMap.TAB,
+          keyMap.ENTER,
+          keyMap.SPACE
+        ], keyCode);
+      },
+      /**
+       * @method isMove
+       *
+       * @param {Number} keyCode
+       * @return {Boolean}
+       */
+      isMove: function (keyCode) {
+        return list.contains([
+          keyMap.LEFT,
+          keyMap.UP,
+          keyMap.RIGHT,
+          keyMap.DOWN
+        ], keyCode);
+      },
+      /**
+       * @property {Object} nameFromCode
+       * @property {String} nameFromCode.8 "BACKSPACE"
+       */
+      nameFromCode: func.invertObject(keyMap),
+      code: keyMap
+    };
+  })();
+
+  var range = (function () {
+
+    /**
+     * return boundaryPoint from TextRange, inspired by Andy Na's HuskyRange.js
+     *
+     * @param {TextRange} textRange
+     * @param {Boolean} isStart
+     * @return {BoundaryPoint}
+     *
+     * @see http://msdn.microsoft.com/en-us/library/ie/ms535872(v=vs.85).aspx
+     */
+    var textRangeToPoint = function (textRange, isStart) {
+      var container = textRange.parentElement(), offset;
+  
+      var tester = document.body.createTextRange(), prevContainer;
+      var childNodes = list.from(container.childNodes);
+      for (offset = 0; offset < childNodes.length; offset++) {
+        if (dom.isText(childNodes[offset])) {
+          continue;
+        }
+        tester.moveToElementText(childNodes[offset]);
+        if (tester.compareEndPoints('StartToStart', textRange) >= 0) {
+          break;
+        }
+        prevContainer = childNodes[offset];
+      }
+  
+      if (offset !== 0 && dom.isText(childNodes[offset - 1])) {
+        var textRangeStart = document.body.createTextRange(), curTextNode = null;
+        textRangeStart.moveToElementText(prevContainer || container);
+        textRangeStart.collapse(!prevContainer);
+        curTextNode = prevContainer ? prevContainer.nextSibling : container.firstChild;
+  
+        var pointTester = textRange.duplicate();
+        pointTester.setEndPoint('StartToStart', textRangeStart);
+        var textCount = pointTester.text.replace(/[\r\n]/g, '').length;
+  
+        while (textCount > curTextNode.nodeValue.length && curTextNode.nextSibling) {
+          textCount -= curTextNode.nodeValue.length;
+          curTextNode = curTextNode.nextSibling;
+        }
+  
+        /* jshint ignore:start */
+        var dummy = curTextNode.nodeValue; // enforce IE to re-reference curTextNode, hack
+        /* jshint ignore:end */
+  
+        if (isStart && curTextNode.nextSibling && dom.isText(curTextNode.nextSibling) &&
+            textCount === curTextNode.nodeValue.length) {
+          textCount -= curTextNode.nodeValue.length;
+          curTextNode = curTextNode.nextSibling;
+        }
+  
+        container = curTextNode;
+        offset = textCount;
+      }
+  
+      return {
+        cont: container,
+        offset: offset
+      };
+    };
+    
+    /**
+     * return TextRange from boundary point (inspired by google closure-library)
+     * @param {BoundaryPoint} point
+     * @return {TextRange}
+     */
+    var pointToTextRange = function (point) {
+      var textRangeInfo = function (container, offset) {
+        var node, isCollapseToStart;
+  
+        if (dom.isText(container)) {
+          var prevTextNodes = dom.listPrev(container, func.not(dom.isText));
+          var prevContainer = list.last(prevTextNodes).previousSibling;
+          node =  prevContainer || container.parentNode;
+          offset += list.sum(list.tail(prevTextNodes), dom.nodeLength);
+          isCollapseToStart = !prevContainer;
+        } else {
+          node = container.childNodes[offset] || container;
+          if (dom.isText(node)) {
+            return textRangeInfo(node, 0);
+          }
+  
+          offset = 0;
+          isCollapseToStart = false;
+        }
+  
+        return {
+          node: node,
+          collapseToStart: isCollapseToStart,
+          offset: offset
+        };
+      };
+  
+      var textRange = document.body.createTextRange();
+      var info = textRangeInfo(point.node, point.offset);
+  
+      textRange.moveToElementText(info.node);
+      textRange.collapse(info.collapseToStart);
+      textRange.moveStart('character', info.offset);
+      return textRange;
+    };
+    
+    /**
+     * Wrapped Range
+     *
+     * @constructor
+     * @param {Node} sc - start container
+     * @param {Number} so - start offset
+     * @param {Node} ec - end container
+     * @param {Number} eo - end offset
+     */
+    var WrappedRange = function (sc, so, ec, eo) {
+      this.sc = sc;
+      this.so = so;
+      this.ec = ec;
+      this.eo = eo;
+  
+      // nativeRange: get nativeRange from sc, so, ec, eo
+      var nativeRange = function () {
+        if (agent.isW3CRangeSupport) {
+          var w3cRange = document.createRange();
+          w3cRange.setStart(sc, so);
+          w3cRange.setEnd(ec, eo);
+
+          return w3cRange;
+        } else {
+          var textRange = pointToTextRange({
+            node: sc,
+            offset: so
+          });
+
+          textRange.setEndPoint('EndToEnd', pointToTextRange({
+            node: ec,
+            offset: eo
+          }));
+
+          return textRange;
+        }
+      };
+
+      this.getPoints = function () {
+        return {
+          sc: sc,
+          so: so,
+          ec: ec,
+          eo: eo
+        };
+      };
+
+      this.getStartPoint = function () {
+        return {
+          node: sc,
+          offset: so
+        };
+      };
+
+      this.getEndPoint = function () {
+        return {
+          node: ec,
+          offset: eo
+        };
+      };
+
+      /**
+       * select update visible range
+       */
+      this.select = function () {
+        var nativeRng = nativeRange();
+        if (agent.isW3CRangeSupport) {
+          var selection = document.getSelection();
+          if (selection.rangeCount > 0) {
+            selection.removeAllRanges();
+          }
+          selection.addRange(nativeRng);
+        } else {
+          nativeRng.select();
+        }
+        
+        return this;
+      };
+
+      /**
+       * Moves the scrollbar to start container(sc) of current range
+       *
+       * @return {WrappedRange}
+       */
+      this.scrollIntoView = function (container) {
+        var height = $(container).height();
+        if (container.scrollTop + height < this.sc.offsetTop) {
+          container.scrollTop += Math.abs(container.scrollTop + height - this.sc.offsetTop);
+        }
+
+        return this;
+      };
+
+      /**
+       * @return {WrappedRange}
+       */
+      this.normalize = function () {
+
+        /**
+         * @param {BoundaryPoint} point
+         * @param {Boolean} isLeftToRight
+         * @return {BoundaryPoint}
+         */
+        var getVisiblePoint = function (point, isLeftToRight) {
+          if ((dom.isVisiblePoint(point) && !dom.isEdgePoint(point)) ||
+              (dom.isVisiblePoint(point) && dom.isRightEdgePoint(point) && !isLeftToRight) ||
+              (dom.isVisiblePoint(point) && dom.isLeftEdgePoint(point) && isLeftToRight) ||
+              (dom.isVisiblePoint(point) && dom.isBlock(point.node) && dom.isEmpty(point.node))) {
+            return point;
+          }
+
+          // point on block's edge
+          var block = dom.ancestor(point.node, dom.isBlock);
+          if (((dom.isLeftEdgePointOf(point, block) || dom.isVoid(dom.prevPoint(point).node)) && !isLeftToRight) ||
+              ((dom.isRightEdgePointOf(point, block) || dom.isVoid(dom.nextPoint(point).node)) && isLeftToRight)) {
+
+            // returns point already on visible point
+            if (dom.isVisiblePoint(point)) {
+              return point;
+            }
+            // reverse direction 
+            isLeftToRight = !isLeftToRight;
+          }
+
+          var nextPoint = isLeftToRight ? dom.nextPointUntil(dom.nextPoint(point), dom.isVisiblePoint) :
+                                          dom.prevPointUntil(dom.prevPoint(point), dom.isVisiblePoint);
+          return nextPoint || point;
+        };
+
+        var endPoint = getVisiblePoint(this.getEndPoint(), false);
+        var startPoint = this.isCollapsed() ? endPoint : getVisiblePoint(this.getStartPoint(), true);
+
+        return new WrappedRange(
+          startPoint.node,
+          startPoint.offset,
+          endPoint.node,
+          endPoint.offset
+        );
+      };
+
+      /**
+       * returns matched nodes on range
+       *
+       * @param {Function} [pred] - predicate function
+       * @param {Object} [options]
+       * @param {Boolean} [options.includeAncestor]
+       * @param {Boolean} [options.fullyContains]
+       * @return {Node[]}
+       */
+      this.nodes = function (pred, options) {
+        pred = pred || func.ok;
+
+        var includeAncestor = options && options.includeAncestor;
+        var fullyContains = options && options.fullyContains;
+
+        // TODO compare points and sort
+        var startPoint = this.getStartPoint();
+        var endPoint = this.getEndPoint();
+
+        var nodes = [];
+        var leftEdgeNodes = [];
+
+        dom.walkPoint(startPoint, endPoint, function (point) {
+          if (dom.isEditable(point.node)) {
+            return;
+          }
+
+          var node;
+          if (fullyContains) {
+            if (dom.isLeftEdgePoint(point)) {
+              leftEdgeNodes.push(point.node);
+            }
+            if (dom.isRightEdgePoint(point) && list.contains(leftEdgeNodes, point.node)) {
+              node = point.node;
+            }
+          } else if (includeAncestor) {
+            node = dom.ancestor(point.node, pred);
+          } else {
+            node = point.node;
+          }
+
+          if (node && pred(node)) {
+            nodes.push(node);
+          }
+        }, true);
+
+        return list.unique(nodes);
+      };
+
+      /**
+       * returns commonAncestor of range
+       * @return {Element} - commonAncestor
+       */
+      this.commonAncestor = function () {
+        return dom.commonAncestor(sc, ec);
+      };
+
+      /**
+       * returns expanded range by pred
+       *
+       * @param {Function} pred - predicate function
+       * @return {WrappedRange}
+       */
+      this.expand = function (pred) {
+        var startAncestor = dom.ancestor(sc, pred);
+        var endAncestor = dom.ancestor(ec, pred);
+
+        if (!startAncestor && !endAncestor) {
+          return new WrappedRange(sc, so, ec, eo);
+        }
+
+        var boundaryPoints = this.getPoints();
+
+        if (startAncestor) {
+          boundaryPoints.sc = startAncestor;
+          boundaryPoints.so = 0;
+        }
+
+        if (endAncestor) {
+          boundaryPoints.ec = endAncestor;
+          boundaryPoints.eo = dom.nodeLength(endAncestor);
+        }
+
+        return new WrappedRange(
+          boundaryPoints.sc,
+          boundaryPoints.so,
+          boundaryPoints.ec,
+          boundaryPoints.eo
+        );
+      };
+
+      /**
+       * @param {Boolean} isCollapseToStart
+       * @return {WrappedRange}
+       */
+      this.collapse = function (isCollapseToStart) {
+        if (isCollapseToStart) {
+          return new WrappedRange(sc, so, sc, so);
+        } else {
+          return new WrappedRange(ec, eo, ec, eo);
+        }
+      };
+
+      /**
+       * splitText on range
+       */
+      this.splitText = function () {
+        var isSameContainer = sc === ec;
+        var boundaryPoints = this.getPoints();
+
+        if (dom.isText(ec) && !dom.isEdgePoint(this.getEndPoint())) {
+          ec.splitText(eo);
+        }
+
+        if (dom.isText(sc) && !dom.isEdgePoint(this.getStartPoint())) {
+          boundaryPoints.sc = sc.splitText(so);
+          boundaryPoints.so = 0;
+
+          if (isSameContainer) {
+            boundaryPoints.ec = boundaryPoints.sc;
+            boundaryPoints.eo = eo - so;
+          }
+        }
+
+        return new WrappedRange(
+          boundaryPoints.sc,
+          boundaryPoints.so,
+          boundaryPoints.ec,
+          boundaryPoints.eo
+        );
+      };
+
+      /**
+       * delete contents on range
+       * @return {WrappedRange}
+       */
+      this.deleteContents = function () {
+        if (this.isCollapsed()) {
+          return this;
+        }
+
+        var rng = this.splitText();
+        var nodes = rng.nodes(null, {
+          fullyContains: true
+        });
+
+        // find new cursor point
+        var point = dom.prevPointUntil(rng.getStartPoint(), function (point) {
+          return !list.contains(nodes, point.node);
+        });
+
+        var emptyParents = [];
+        $.each(nodes, function (idx, node) {
+          // find empty parents
+          var parent = node.parentNode;
+          if (point.node !== parent && dom.nodeLength(parent) === 1) {
+            emptyParents.push(parent);
+          }
+          dom.remove(node, false);
+        });
+
+        // remove empty parents
+        $.each(emptyParents, function (idx, node) {
+          dom.remove(node, false);
+        });
+
+        return new WrappedRange(
+          point.node,
+          point.offset,
+          point.node,
+          point.offset
+        ).normalize();
+      };
+      
+      /**
+       * makeIsOn: return isOn(pred) function
+       */
+      var makeIsOn = function (pred) {
+        return function () {
+          var ancestor = dom.ancestor(sc, pred);
+          return !!ancestor && (ancestor === dom.ancestor(ec, pred));
+        };
+      };
+  
+      // isOnEditable: judge whether range is on editable or not
+      this.isOnEditable = makeIsOn(dom.isEditable);
+      // isOnList: judge whether range is on list node or not
+      this.isOnList = makeIsOn(dom.isList);
+      // isOnAnchor: judge whether range is on anchor node or not
+      this.isOnAnchor = makeIsOn(dom.isAnchor);
+      // isOnCell: judge whether range is on cell node or not
+      this.isOnCell = makeIsOn(dom.isCell);
+      // isOnData: judge whether range is on data node or not
+      this.isOnData = makeIsOn(dom.isData);
+
+      /**
+       * @param {Function} pred
+       * @return {Boolean}
+       */
+      this.isLeftEdgeOf = function (pred) {
+        if (!dom.isLeftEdgePoint(this.getStartPoint())) {
+          return false;
+        }
+
+        var node = dom.ancestor(this.sc, pred);
+        return node && dom.isLeftEdgeOf(this.sc, node);
+      };
+
+      /**
+       * returns whether range was collapsed or not
+       */
+      this.isCollapsed = function () {
+        return sc === ec && so === eo;
+      };
+
+      /**
+       * wrap inline nodes which children of body with paragraph
+       *
+       * @return {WrappedRange}
+       */
+      this.wrapBodyInlineWithPara = function () {
+        if (dom.isBodyContainer(sc) && dom.isEmpty(sc)) {
+          sc.innerHTML = dom.emptyPara;
+          return new WrappedRange(sc.firstChild, 0, sc.firstChild, 0);
+        }
+
+        /**
+         * [workaround] firefox often create range on not visible point. so normalize here.
+         *  - firefox: |<p>text</p>|
+         *  - chrome: <p>|text|</p>
+         */
+        var rng = this.normalize();
+        if (dom.isParaInline(sc) || dom.isPara(sc)) {
+          return rng;
+        }
+
+        // find inline top ancestor
+        var topAncestor;
+        if (dom.isInline(rng.sc)) {
+          var ancestors = dom.listAncestor(rng.sc, func.not(dom.isInline));
+          topAncestor = list.last(ancestors);
+          if (!dom.isInline(topAncestor)) {
+            topAncestor = ancestors[ancestors.length - 2] || rng.sc.childNodes[rng.so];
+          }
+        } else {
+          topAncestor = rng.sc.childNodes[rng.so > 0 ? rng.so - 1 : 0];
+        }
+
+        // siblings not in paragraph
+        var inlineSiblings = dom.listPrev(topAncestor, dom.isParaInline).reverse();
+        inlineSiblings = inlineSiblings.concat(dom.listNext(topAncestor.nextSibling, dom.isParaInline));
+
+        // wrap with paragraph
+        if (inlineSiblings.length) {
+          var para = dom.wrap(list.head(inlineSiblings), 'p');
+          dom.appendChildNodes(para, list.tail(inlineSiblings));
+        }
+
+        return this.normalize();
+      };
+
+      /**
+       * insert node at current cursor
+       *
+       * @param {Node} node
+       * @return {Node}
+       */
+      this.insertNode = function (node) {
+        var rng = this.wrapBodyInlineWithPara().deleteContents();
+        var info = dom.splitPoint(rng.getStartPoint(), dom.isInline(node));
+
+        if (info.rightNode) {
+          info.rightNode.parentNode.insertBefore(node, info.rightNode);
+        } else {
+          info.container.appendChild(node);
+        }
+
+        return node;
+      };
+
+      /**
+       * insert html at current cursor
+       */
+      this.pasteHTML = function (markup) {
+        var contentsContainer = $('<div></div>').html(markup)[0];
+        var childNodes = list.from(contentsContainer.childNodes);
+
+        var rng = this.wrapBodyInlineWithPara().deleteContents();
+
+        return childNodes.reverse().map(function (childNode) {
+          return rng.insertNode(childNode);
+        }).reverse();
+      };
+  
+      /**
+       * returns text in range
+       *
+       * @return {String}
+       */
+      this.toString = function () {
+        var nativeRng = nativeRange();
+        return agent.isW3CRangeSupport ? nativeRng.toString() : nativeRng.text;
+      };
+
+      /**
+       * returns range for word before cursor
+       *
+       * @param {Boolean} [findAfter] - find after cursor, default: false
+       * @return {WrappedRange}
+       */
+      this.getWordRange = function (findAfter) {
+        var endPoint = this.getEndPoint();
+
+        if (!dom.isCharPoint(endPoint)) {
+          return this;
+        }
+
+        var startPoint = dom.prevPointUntil(endPoint, function (point) {
+          return !dom.isCharPoint(point);
+        });
+
+        if (findAfter) {
+          endPoint = dom.nextPointUntil(endPoint, function (point) {
+            return !dom.isCharPoint(point);
+          });
+        }
+
+        return new WrappedRange(
+          startPoint.node,
+          startPoint.offset,
+          endPoint.node,
+          endPoint.offset
+        );
+      };
+  
+      /**
+       * create offsetPath bookmark
+       *
+       * @param {Node} editable
+       */
+      this.bookmark = function (editable) {
+        return {
+          s: {
+            path: dom.makeOffsetPath(editable, sc),
+            offset: so
+          },
+          e: {
+            path: dom.makeOffsetPath(editable, ec),
+            offset: eo
+          }
+        };
+      };
+
+      /**
+       * create offsetPath bookmark base on paragraph
+       *
+       * @param {Node[]} paras
+       */
+      this.paraBookmark = function (paras) {
+        return {
+          s: {
+            path: list.tail(dom.makeOffsetPath(list.head(paras), sc)),
+            offset: so
+          },
+          e: {
+            path: list.tail(dom.makeOffsetPath(list.last(paras), ec)),
+            offset: eo
+          }
+        };
+      };
+
+      /**
+       * getClientRects
+       * @return {Rect[]}
+       */
+      this.getClientRects = function () {
+        var nativeRng = nativeRange();
+        return nativeRng.getClientRects();
+      };
+    };
+
+  /**
+   * @class core.range
+   *
+   * Data structure
+   *  * BoundaryPoint: a point of dom tree
+   *  * BoundaryPoints: two boundaryPoints corresponding to the start and the end of the Range
+   *
+   * See to http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html#Level-2-Range-Position
+   *
+   * @singleton
+   * @alternateClassName range
+   */
+    return {
+      /**
+       * create Range Object From arguments or Browser Selection
+       *
+       * @param {Node} sc - start container
+       * @param {Number} so - start offset
+       * @param {Node} ec - end container
+       * @param {Number} eo - end offset
+       * @return {WrappedRange}
+       */
+      create: function (sc, so, ec, eo) {
+        if (arguments.length === 4) {
+          return new WrappedRange(sc, so, ec, eo);
+        } else if (arguments.length === 2) { //collapsed
+          ec = sc;
+          eo = so;
+          return new WrappedRange(sc, so, ec, eo);
+        } else {
+          var wrappedRange = this.createFromSelection();
+          if (!wrappedRange && arguments.length === 1) {
+            wrappedRange = this.createFromNode(arguments[0]);
+            return wrappedRange.collapse(dom.emptyPara === arguments[0].innerHTML);
+          }
+          return wrappedRange;
+        }
+      },
+
+      createFromSelection: function () {
+        var sc, so, ec, eo;
+        if (agent.isW3CRangeSupport) {
+          var selection = document.getSelection();
+          if (!selection || selection.rangeCount === 0) {
+            return null;
+          } else if (dom.isBody(selection.anchorNode)) {
+            // Firefox: returns entire body as range on initialization.
+            // We won't never need it.
+            return null;
+          }
+
+          var nativeRng = selection.getRangeAt(0);
+          sc = nativeRng.startContainer;
+          so = nativeRng.startOffset;
+          ec = nativeRng.endContainer;
+          eo = nativeRng.endOffset;
+        } else { // IE8: TextRange
+          var textRange = document.selection.createRange();
+          var textRangeEnd = textRange.duplicate();
+          textRangeEnd.collapse(false);
+          var textRangeStart = textRange;
+          textRangeStart.collapse(true);
+
+          var startPoint = textRangeToPoint(textRangeStart, true),
+          endPoint = textRangeToPoint(textRangeEnd, false);
+
+          // same visible point case: range was collapsed.
+          if (dom.isText(startPoint.node) && dom.isLeftEdgePoint(startPoint) &&
+              dom.isTextNode(endPoint.node) && dom.isRightEdgePoint(endPoint) &&
+              endPoint.node.nextSibling === startPoint.node) {
+            startPoint = endPoint;
+          }
+
+          sc = startPoint.cont;
+          so = startPoint.offset;
+          ec = endPoint.cont;
+          eo = endPoint.offset;
+        }
+
+        return new WrappedRange(sc, so, ec, eo);
+      },
+
+      /**
+       * @method 
+       * 
+       * create WrappedRange from node
+       *
+       * @param {Node} node
+       * @return {WrappedRange}
+       */
+      createFromNode: function (node) {
+        var sc = node;
+        var so = 0;
+        var ec = node;
+        var eo = dom.nodeLength(ec);
+
+        // browsers can't target a picture or void node
+        if (dom.isVoid(sc)) {
+          so = dom.listPrev(sc).length - 1;
+          sc = sc.parentNode;
+        }
+        if (dom.isBR(ec)) {
+          eo = dom.listPrev(ec).length - 1;
+          ec = ec.parentNode;
+        } else if (dom.isVoid(ec)) {
+          eo = dom.listPrev(ec).length;
+          ec = ec.parentNode;
+        }
+
+        return this.create(sc, so, ec, eo);
+      },
+
+      /**
+       * create WrappedRange from node after position
+       *
+       * @param {Node} node
+       * @return {WrappedRange}
+       */
+      createFromNodeBefore: function (node) {
+        return this.createFromNode(node).collapse(true);
+      },
+
+      /**
+       * create WrappedRange from node after position
+       *
+       * @param {Node} node
+       * @return {WrappedRange}
+       */
+      createFromNodeAfter: function (node) {
+        return this.createFromNode(node).collapse();
+      },
+
+      /**
+       * @method 
+       * 
+       * create WrappedRange from bookmark
+       *
+       * @param {Node} editable
+       * @param {Object} bookmark
+       * @return {WrappedRange}
+       */
+      createFromBookmark: function (editable, bookmark) {
+        var sc = dom.fromOffsetPath(editable, bookmark.s.path);
+        var so = bookmark.s.offset;
+        var ec = dom.fromOffsetPath(editable, bookmark.e.path);
+        var eo = bookmark.e.offset;
+        return new WrappedRange(sc, so, ec, eo);
+      },
+
+      /**
+       * @method 
+       *
+       * create WrappedRange from paraBookmark
+       *
+       * @param {Object} bookmark
+       * @param {Node[]} paras
+       * @return {WrappedRange}
+       */
+      createFromParaBookmark: function (bookmark, paras) {
+        var so = bookmark.s.offset;
+        var eo = bookmark.e.offset;
+        var sc = dom.fromOffsetPath(list.head(paras), bookmark.s.path);
+        var ec = dom.fromOffsetPath(list.last(paras), bookmark.e.path);
+
+        return new WrappedRange(sc, so, ec, eo);
+      }
+    };
+  })();
+
+  /**
+   * @class core.async
+   *
+   * Async functions which returns `Promise`
+   *
+   * @singleton
+   * @alternateClassName async
+   */
+  var async = (function () {
+    /**
+     * @method readFileAsDataURL
+     *
+     * read contents of file as representing URL
+     *
+     * @param {File} file
+     * @return {Promise} - then: dataUrl
+     */
+    var readFileAsDataURL = function (file) {
+      return $.Deferred(function (deferred) {
+        $.extend(new FileReader(), {
+          onload: function (e) {
+            var dataURL = e.target.result;
+            deferred.resolve(dataURL);
+          },
+          onerror: function () {
+            deferred.reject(this);
+          }
+        }).readAsDataURL(file);
+      }).promise();
+    };
+  
+    /**
+     * @method createImage
+     *
+     * create `<image>` from url string
+     *
+     * @param {String} url
+     * @return {Promise} - then: $image
+     */
+    var createImage = function (url) {
+      return $.Deferred(function (deferred) {
+        var $img = $('<img>');
+
+        $img.one('load', function () {
+          $img.off('error abort');
+          deferred.resolve($img);
+        }).one('error abort', function () {
+          $img.off('load').detach();
+          deferred.reject($img);
+        }).css({
+          display: 'none'
+        }).appendTo(document.body).attr('src', url);
+      }).promise();
+    };
+
+    return {
+      readFileAsDataURL: readFileAsDataURL,
+      createImage: createImage
+    };
+  })();
+
+  /**
+   * @class editing.History
+   *
+   * Editor History
+   *
+   */
+  var History = function ($editable) {
+    var stack = [], stackOffset = -1;
+    var editable = $editable[0];
+
+    var makeSnapshot = function () {
+      var rng = range.create(editable);
+      var emptyBookmark = {s: {path: [], offset: 0}, e: {path: [], offset: 0}};
+
+      return {
+        contents: $editable.html(),
+        bookmark: (rng ? rng.bookmark(editable) : emptyBookmark)
+      };
+    };
+
+    var applySnapshot = function (snapshot) {
+      if (snapshot.contents !== null) {
+        $editable.html(snapshot.contents);
+      }
+      if (snapshot.bookmark !== null) {
+        range.createFromBookmark(editable, snapshot.bookmark).select();
+      }
+    };
+
+    /**
+    * @method rewind
+    * Rewinds the history stack back to the first snapshot taken.
+    * Leaves the stack intact, so that "Redo" can still be used.
+    */
+    this.rewind = function () {
+      // Create snap shot if not yet recorded
+      if ($editable.html() !== stack[stackOffset].contents) {
+        this.recordUndo();
+      }
+
+      // Return to the first available snapshot.
+      stackOffset = 0;
+
+      // Apply that snapshot.
+      applySnapshot(stack[stackOffset]);
+    };
+
+    /**
+    * @method reset
+    * Resets the history stack completely; reverting to an empty editor.
+    */
+    this.reset = function () {
+      // Clear the stack.
+      stack = [];
+
+      // Restore stackOffset to its original value.
+      stackOffset = -1;
+
+      // Clear the editable area.
+      $editable.html('');
+
+      // Record our first snapshot (of nothing).
+      this.recordUndo();
+    };
+
+    /**
+     * undo
+     */
+    this.undo = function () {
+      // Create snap shot if not yet recorded
+      if ($editable.html() !== stack[stackOffset].contents) {
+        this.recordUndo();
+      }
+
+      if (0 < stackOffset) {
+        stackOffset--;
+        applySnapshot(stack[stackOffset]);
+      }
+    };
+
+    /**
+     * redo
+     */
+    this.redo = function () {
+      if (stack.length - 1 > stackOffset) {
+        stackOffset++;
+        applySnapshot(stack[stackOffset]);
+      }
+    };
+
+    /**
+     * recorded undo
+     */
+    this.recordUndo = function () {
+      stackOffset++;
+
+      // Wash out stack after stackOffset
+      if (stack.length > stackOffset) {
+        stack = stack.slice(0, stackOffset);
+      }
+
+      // Create new snapshot and push it to the end
+      stack.push(makeSnapshot());
+    };
+  };
+
+  /**
+   * @class editing.Style
+   *
+   * Style
+   *
+   */
+  var Style = function () {
+    /**
+     * @method jQueryCSS
+     *
+     * [workaround] for old jQuery
+     * passing an array of style properties to .css()
+     * will result in an object of property-value pairs.
+     * (compability with version < 1.9)
+     *
+     * @private
+     * @param  {jQuery} $obj
+     * @param  {Array} propertyNames - An array of one or more CSS properties.
+     * @return {Object}
+     */
+    var jQueryCSS = function ($obj, propertyNames) {
+      if (agent.jqueryVersion < 1.9) {
+        var result = {};
+        $.each(propertyNames, function (idx, propertyName) {
+          result[propertyName] = $obj.css(propertyName);
+        });
+        return result;
+      }
+      return $obj.css.call($obj, propertyNames);
+    };
+
+    /**
+     * returns style object from node
+     *
+     * @param {jQuery} $node
+     * @return {Object}
+     */
+    this.fromNode = function ($node) {
+      var properties = ['font-family', 'font-size', 'text-align', 'list-style-type', 'line-height'];
+      var styleInfo = jQueryCSS($node, properties) || {};
+      styleInfo['font-size'] = parseInt(styleInfo['font-size'], 10);
+      return styleInfo;
+    };
+
+    /**
+     * paragraph level style
+     *
+     * @param {WrappedRange} rng
+     * @param {Object} styleInfo
+     */
+    this.stylePara = function (rng, styleInfo) {
+      $.each(rng.nodes(dom.isPara, {
+        includeAncestor: true
+      }), function (idx, para) {
+        $(para).css(styleInfo);
+      });
+    };
+
+    /**
+     * insert and returns styleNodes on range.
+     *
+     * @param {WrappedRange} rng
+     * @param {Object} [options] - options for styleNodes
+     * @param {String} [options.nodeName] - default: `SPAN`
+     * @param {Boolean} [options.expandClosestSibling] - default: `false`
+     * @param {Boolean} [options.onlyPartialContains] - default: `false`
+     * @return {Node[]}
+     */
+    this.styleNodes = function (rng, options) {
+      rng = rng.splitText();
+
+      var nodeName = options && options.nodeName || 'SPAN';
+      var expandClosestSibling = !!(options && options.expandClosestSibling);
+      var onlyPartialContains = !!(options && options.onlyPartialContains);
+
+      if (rng.isCollapsed()) {
+        return [rng.insertNode(dom.create(nodeName))];
+      }
+
+      var pred = dom.makePredByNodeName(nodeName);
+      var nodes = rng.nodes(dom.isText, {
+        fullyContains: true
+      }).map(function (text) {
+        return dom.singleChildAncestor(text, pred) || dom.wrap(text, nodeName);
+      });
+
+      if (expandClosestSibling) {
+        if (onlyPartialContains) {
+          var nodesInRange = rng.nodes();
+          // compose with partial contains predication
+          pred = func.and(pred, function (node) {
+            return list.contains(nodesInRange, node);
+          });
+        }
+
+        return nodes.map(function (node) {
+          var siblings = dom.withClosestSiblings(node, pred);
+          var head = list.head(siblings);
+          var tails = list.tail(siblings);
+          $.each(tails, function (idx, elem) {
+            dom.appendChildNodes(head, elem.childNodes);
+            dom.remove(elem);
+          });
+          return list.head(siblings);
+        });
+      } else {
+        return nodes;
+      }
+    };
+
+    /**
+     * get current style on cursor
+     *
+     * @param {WrappedRange} rng
+     * @return {Object} - object contains style properties.
+     */
+    this.current = function (rng) {
+      var $cont = $(!dom.isElement(rng.sc) ? rng.sc.parentNode : rng.sc);
+      var styleInfo = this.fromNode($cont);
+
+      // document.queryCommandState for toggle state
+      // [workaround] prevent Firefox nsresult: "0x80004005 (NS_ERROR_FAILURE)"
+      try {
+        styleInfo = $.extend(styleInfo, {
+          'font-bold': document.queryCommandState('bold') ? 'bold' : 'normal',
+          'font-italic': document.queryCommandState('italic') ? 'italic' : 'normal',
+          'font-underline': document.queryCommandState('underline') ? 'underline' : 'normal',
+          'font-subscript': document.queryCommandState('subscript') ? 'subscript' : 'normal',
+          'font-superscript': document.queryCommandState('superscript') ? 'superscript' : 'normal',
+          'font-strikethrough': document.queryCommandState('strikethrough') ? 'strikethrough' : 'normal'
+        });
+      } catch (e) {}
+
+      // list-style-type to list-style(unordered, ordered)
+      if (!rng.isOnList()) {
+        styleInfo['list-style'] = 'none';
+      } else {
+        var orderedTypes = ['circle', 'disc', 'disc-leading-zero', 'square'];
+        var isUnordered = $.inArray(styleInfo['list-style-type'], orderedTypes) > -1;
+        styleInfo['list-style'] = isUnordered ? 'unordered' : 'ordered';
+      }
+
+      var para = dom.ancestor(rng.sc, dom.isPara);
+      if (para && para.style['line-height']) {
+        styleInfo['line-height'] = para.style.lineHeight;
+      } else {
+        var lineHeight = parseInt(styleInfo['line-height'], 10) / parseInt(styleInfo['font-size'], 10);
+        styleInfo['line-height'] = lineHeight.toFixed(1);
+      }
+
+      styleInfo.anchor = rng.isOnAnchor() && dom.ancestor(rng.sc, dom.isAnchor);
+      styleInfo.ancestors = dom.listAncestor(rng.sc, dom.isEditable);
+      styleInfo.range = rng;
+
+      return styleInfo;
+    };
+  };
+
+
+  /**
+   * @class editing.Bullet
+   *
+   * @alternateClassName Bullet
+   */
+  var Bullet = function () {
+    var self = this;
+
+    /**
+     * toggle ordered list
+     */
+    this.insertOrderedList = function (editable) {
+      this.toggleList('OL', editable);
+    };
+
+    /**
+     * toggle unordered list
+     */
+    this.insertUnorderedList = function (editable) {
+      this.toggleList('UL', editable);
+    };
+
+    /**
+     * indent
+     */
+    this.indent = function (editable) {
+      var self = this;
+      var rng = range.create(editable).wrapBodyInlineWithPara();
+
+      var paras = rng.nodes(dom.isPara, { includeAncestor: true });
+      var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
+
+      $.each(clustereds, function (idx, paras) {
+        var head = list.head(paras);
+        if (dom.isLi(head)) {
+          self.wrapList(paras, head.parentNode.nodeName);
+        } else {
+          $.each(paras, function (idx, para) {
+            $(para).css('marginLeft', function (idx, val) {
+              return (parseInt(val, 10) || 0) + 25;
+            });
+          });
+        }
+      });
+
+      rng.select();
+    };
+
+    /**
+     * outdent
+     */
+    this.outdent = function (editable) {
+      var self = this;
+      var rng = range.create(editable).wrapBodyInlineWithPara();
+
+      var paras = rng.nodes(dom.isPara, { includeAncestor: true });
+      var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
+
+      $.each(clustereds, function (idx, paras) {
+        var head = list.head(paras);
+        if (dom.isLi(head)) {
+          self.releaseList([paras]);
+        } else {
+          $.each(paras, function (idx, para) {
+            $(para).css('marginLeft', function (idx, val) {
+              val = (parseInt(val, 10) || 0);
+              return val > 25 ? val - 25 : '';
+            });
+          });
+        }
+      });
+
+      rng.select();
+    };
+
+    /**
+     * toggle list
+     *
+     * @param {String} listName - OL or UL
+     */
+    this.toggleList = function (listName, editable) {
+      var rng = range.create(editable).wrapBodyInlineWithPara();
+
+      var paras = rng.nodes(dom.isPara, { includeAncestor: true });
+      var bookmark = rng.paraBookmark(paras);
+      var clustereds = list.clusterBy(paras, func.peq2('parentNode'));
+
+      // paragraph to list
+      if (list.find(paras, dom.isPurePara)) {
+        var wrappedParas = [];
+        $.each(clustereds, function (idx, paras) {
+          wrappedParas = wrappedParas.concat(self.wrapList(paras, listName));
+        });
+        paras = wrappedParas;
+      // list to paragraph or change list style
+      } else {
+        var diffLists = rng.nodes(dom.isList, {
+          includeAncestor: true
+        }).filter(function (listNode) {
+          return !$.nodeName(listNode, listName);
+        });
+
+        if (diffLists.length) {
+          $.each(diffLists, function (idx, listNode) {
+            dom.replace(listNode, listName);
+          });
+        } else {
+          paras = this.releaseList(clustereds, true);
+        }
+      }
+
+      range.createFromParaBookmark(bookmark, paras).select();
+    };
+
+    /**
+     * @param {Node[]} paras
+     * @param {String} listName
+     * @return {Node[]}
+     */
+    this.wrapList = function (paras, listName) {
+      var head = list.head(paras);
+      var last = list.last(paras);
+
+      var prevList = dom.isList(head.previousSibling) && head.previousSibling;
+      var nextList = dom.isList(last.nextSibling) && last.nextSibling;
+
+      var listNode = prevList || dom.insertAfter(dom.create(listName || 'UL'), last);
+
+      // P to LI
+      paras = paras.map(function (para) {
+        return dom.isPurePara(para) ? dom.replace(para, 'LI') : para;
+      });
+
+      // append to list(<ul>, <ol>)
+      dom.appendChildNodes(listNode, paras);
+
+      if (nextList) {
+        dom.appendChildNodes(listNode, list.from(nextList.childNodes));
+        dom.remove(nextList);
+      }
+
+      return paras;
+    };
+
+    /**
+     * @method releaseList
+     *
+     * @param {Array[]} clustereds
+     * @param {Boolean} isEscapseToBody
+     * @return {Node[]}
+     */
+    this.releaseList = function (clustereds, isEscapseToBody) {
+      var releasedParas = [];
+
+      $.each(clustereds, function (idx, paras) {
+        var head = list.head(paras);
+        var last = list.last(paras);
+
+        var headList = isEscapseToBody ? dom.lastAncestor(head, dom.isList) :
+                                         head.parentNode;
+        var lastList = headList.childNodes.length > 1 ? dom.splitTree(headList, {
+          node: last.parentNode,
+          offset: dom.position(last) + 1
+        }, {
+          isSkipPaddingBlankHTML: true
+        }) : null;
+
+        var middleList = dom.splitTree(headList, {
+          node: head.parentNode,
+          offset: dom.position(head)
+        }, {
+          isSkipPaddingBlankHTML: true
+        });
+
+        paras = isEscapseToBody ? dom.listDescendant(middleList, dom.isLi) :
+                                  list.from(middleList.childNodes).filter(dom.isLi);
+
+        // LI to P
+        if (isEscapseToBody || !dom.isList(headList.parentNode)) {
+          paras = paras.map(function (para) {
+            return dom.replace(para, 'P');
+          });
+        }
+
+        $.each(list.from(paras).reverse(), function (idx, para) {
+          dom.insertAfter(para, headList);
+        });
+
+        // remove empty lists
+        var rootLists = list.compact([headList, middleList, lastList]);
+        $.each(rootLists, function (idx, rootList) {
+          var listNodes = [rootList].concat(dom.listDescendant(rootList, dom.isList));
+          $.each(listNodes.reverse(), function (idx, listNode) {
+            if (!dom.nodeLength(listNode)) {
+              dom.remove(listNode, true);
+            }
+          });
+        });
+
+        releasedParas = releasedParas.concat(paras);
+      });
+
+      return releasedParas;
+    };
+  };
+
+
+  /**
+   * @class editing.Typing
+   *
+   * Typing
+   *
+   */
+  var Typing = function () {
+
+    // a Bullet instance to toggle lists off
+    var bullet = new Bullet();
+
+    /**
+     * insert tab
+     *
+     * @param {WrappedRange} rng
+     * @param {Number} tabsize
+     */
+    this.insertTab = function (rng, tabsize) {
+      var tab = dom.createText(new Array(tabsize + 1).join(dom.NBSP_CHAR));
+      rng = rng.deleteContents();
+      rng.insertNode(tab, true);
+
+      rng = range.create(tab, tabsize);
+      rng.select();
+    };
+
+    /**
+     * insert paragraph
+     */
+    this.insertParagraph = function (editable) {
+      var rng = range.create(editable);
+
+      // deleteContents on range.
+      rng = rng.deleteContents();
+
+      // Wrap range if it needs to be wrapped by paragraph
+      rng = rng.wrapBodyInlineWithPara();
+
+      // finding paragraph
+      var splitRoot = dom.ancestor(rng.sc, dom.isPara);
+
+      var nextPara;
+      // on paragraph: split paragraph
+      if (splitRoot) {
+        // if it is an empty line with li
+        if (dom.isEmpty(splitRoot) && dom.isLi(splitRoot)) {
+          // toogle UL/OL and escape
+          bullet.toggleList(splitRoot.parentNode.nodeName);
+          return;
+        // if it is an empty line with para on blockquote
+        } else if (dom.isEmpty(splitRoot) && dom.isPara(splitRoot) && dom.isBlockquote(splitRoot.parentNode)) {
+          // escape blockquote
+          dom.insertAfter(splitRoot, splitRoot.parentNode);
+          nextPara = splitRoot;
+        // if new line has content (not a line break)
+        } else {
+          nextPara = dom.splitTree(splitRoot, rng.getStartPoint());
+
+          var emptyAnchors = dom.listDescendant(splitRoot, dom.isEmptyAnchor);
+          emptyAnchors = emptyAnchors.concat(dom.listDescendant(nextPara, dom.isEmptyAnchor));
+
+          $.each(emptyAnchors, function (idx, anchor) {
+            dom.remove(anchor);
+          });
+
+          // replace empty heading or pre with P tag
+          if ((dom.isHeading(nextPara) || dom.isPre(nextPara)) && dom.isEmpty(nextPara)) {
+            nextPara = dom.replace(nextPara, 'p');
+          }
+        }
+      // no paragraph: insert empty paragraph
+      } else {
+        var next = rng.sc.childNodes[rng.so];
+        nextPara = $(dom.emptyPara)[0];
+        if (next) {
+          rng.sc.insertBefore(nextPara, next);
+        } else {
+          rng.sc.appendChild(nextPara);
+        }
+      }
+
+      range.create(nextPara, 0).normalize().select().scrollIntoView(editable);
+    };
+  };
+
+  /**
+   * @class editing.Table
+   *
+   * Table
+   *
+   */
+  var Table = function () {
+    /**
+     * handle tab key
+     *
+     * @param {WrappedRange} rng
+     * @param {Boolean} isShift
+     */
+    this.tab = function (rng, isShift) {
+      var cell = dom.ancestor(rng.commonAncestor(), dom.isCell);
+      var table = dom.ancestor(cell, dom.isTable);
+      var cells = dom.listDescendant(table, dom.isCell);
+
+      var nextCell = list[isShift ? 'prev' : 'next'](cells, cell);
+      if (nextCell) {
+        range.create(nextCell, 0).select();
+      }
+    };
+
+    /**
+     * create empty table element
+     *
+     * @param {Number} rowCount
+     * @param {Number} colCount
+     * @return {Node}
+     */
+    this.createTable = function (colCount, rowCount, options) {
+      var tds = [], tdHTML;
+      for (var idxCol = 0; idxCol < colCount; idxCol++) {
+        tds.push('<td>' + dom.blank + '</td>');
+      }
+      tdHTML = tds.join('');
+
+      var trs = [], trHTML;
+      for (var idxRow = 0; idxRow < rowCount; idxRow++) {
+        trs.push('<tr>' + tdHTML + '</tr>');
+      }
+      trHTML = trs.join('');
+      var $table = $('<table>' + trHTML + '</table>');
+      if (options && options.tableClassName) {
+        $table.addClass(options.tableClassName);
+      }
+
+      return $table[0];
+    };
+  };
+
+
+  var KEY_BOGUS = 'bogus';
+
+  /**
+   * @class Editor
+   */
+  var Editor = function (context) {
+    var self = this;
+
+    var $note = context.layoutInfo.note;
+    var $editor = context.layoutInfo.editor;
+    var $editable = context.layoutInfo.editable;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    var editable = $editable[0];
+    var lastRange = null;
+
+    var style = new Style();
+    var table = new Table();
+    var typing = new Typing();
+    var bullet = new Bullet();
+    var history = new History($editable);
+
+    this.initialize = function () {
+      // bind custom events
+      $editable.on('keydown', function (event) {
+        if (event.keyCode === key.code.ENTER) {
+          context.triggerEvent('enter', event);
+        }
+        context.triggerEvent('keydown', event);
+
+        if (!event.isDefaultPrevented()) {
+          if (options.shortcuts) {
+            self.handleKeyMap(event);
+          } else {
+            self.preventDefaultEditableShortCuts(event);
+          }
+        }
+      }).on('keyup', function (event) {
+        context.triggerEvent('keyup', event);
+      }).on('focus', function (event) {
+        context.triggerEvent('focus', event);
+      }).on('blur', function (event) {
+        context.triggerEvent('blur', event);
+      }).on('mousedown', function (event) {
+        context.triggerEvent('mousedown', event);
+      }).on('mouseup', function (event) {
+        context.triggerEvent('mouseup', event);
+      }).on('scroll', function (event) {
+        context.triggerEvent('scroll', event);
+      }).on('paste', function (event) {
+        context.triggerEvent('paste', event);
+      });
+
+      // init content before set event
+      $editable.html(dom.html($note) || dom.emptyPara);
+
+      // [workaround] IE doesn't have input events for contentEditable
+      // - see: https://goo.gl/4bfIvA
+      var changeEventName = agent.isMSIE ? 'DOMCharacterDataModified DOMSubtreeModified DOMNodeInserted' : 'input';
+      $editable.on(changeEventName, func.debounce(function () {
+        context.triggerEvent('change', $editable.html());
+      }, 250));
+
+      $editor.on('focusin', function (event) {
+        context.triggerEvent('focusin', event);
+      }).on('focusout', function (event) {
+        context.triggerEvent('focusout', event);
+      });
+
+      if (!options.airMode) {
+        if (options.width) {
+          $editor.outerWidth(options.width);
+        }
+        if (options.height) {
+          $editable.outerHeight(options.height);
+        }
+        if (options.maxHeight) {
+          $editable.css('max-height', options.maxHeight);
+        }
+        if (options.minHeight) {
+          $editable.css('min-height', options.minHeight);
+        }
+      }
+
+      history.recordUndo();
+    };
+
+    this.destroy = function () {
+      $editable.off();
+    };
+
+    this.handleKeyMap = function (event) {
+      var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
+      var keys = [];
+
+      if (event.metaKey) { keys.push('CMD'); }
+      if (event.ctrlKey && !event.altKey) { keys.push('CTRL'); }
+      if (event.shiftKey) { keys.push('SHIFT'); }
+
+      var keyName = key.nameFromCode[event.keyCode];
+      if (keyName) {
+        keys.push(keyName);
+      }
+
+      var eventName = keyMap[keys.join('+')];
+      if (eventName) {
+        event.preventDefault();
+        context.invoke(eventName);
+      } else if (key.isEdit(event.keyCode)) {
+        this.afterCommand();
+      }
+    };
+
+    this.preventDefaultEditableShortCuts = function (event) {
+      // B(Bold, 66) / I(Italic, 73) / U(Underline, 85)
+      if ((event.ctrlKey || event.metaKey) &&
+        list.contains([66, 73, 85], event.keyCode)) {
+        event.preventDefault();
+      }
+    };
+
+    /**
+     * create range
+     * @return {WrappedRange}
+     */
+    this.createRange = function () {
+      this.focus();
+      return range.create(editable);
+    };
+
+    /**
+     * saveRange
+     *
+     * save current range
+     *
+     * @param {Boolean} [thenCollapse=false]
+     */
+    this.saveRange = function (thenCollapse) {
+      lastRange = this.createRange();
+      if (thenCollapse) {
+        lastRange.collapse().select();
+      }
+    };
+
+    /**
+     * restoreRange
+     *
+     * restore lately range
+     */
+    this.restoreRange = function () {
+      if (lastRange) {
+        lastRange.select();
+        this.focus();
+      }
+    };
+
+    this.saveTarget = function (node) {
+      $editable.data('target', node);
+    };
+
+    this.clearTarget = function () {
+      $editable.removeData('target');
+    };
+
+    this.restoreTarget = function () {
+      return $editable.data('target');
+    };
+
+    /**
+     * currentStyle
+     *
+     * current style
+     * @return {Object|Boolean} unfocus
+     */
+    this.currentStyle = function () {
+      var rng = range.create();
+      if (rng) {
+        rng = rng.normalize();
+      }
+      return rng ? style.current(rng) : style.fromNode($editable);
+    };
+
+    /**
+     * style from node
+     *
+     * @param {jQuery} $node
+     * @return {Object}
+     */
+    this.styleFromNode = function ($node) {
+      return style.fromNode($node);
+    };
+
+    /**
+     * undo
+     */
+    this.undo = function () {
+      context.triggerEvent('before.command', $editable.html());
+      history.undo();
+      context.triggerEvent('change', $editable.html());
+    };
+    context.memo('help.undo', lang.help.undo);
+
+    /**
+     * redo
+     */
+    this.redo = function () {
+      context.triggerEvent('before.command', $editable.html());
+      history.redo();
+      context.triggerEvent('change', $editable.html());
+    };
+    context.memo('help.redo', lang.help.redo);
+
+    /**
+     * before command
+     */
+    var beforeCommand = this.beforeCommand = function () {
+      context.triggerEvent('before.command', $editable.html());
+      // keep focus on editable before command execution
+      self.focus();
+    };
+
+    /**
+     * after command
+     * @param {Boolean} isPreventTrigger
+     */
+    var afterCommand = this.afterCommand = function (isPreventTrigger) {
+      history.recordUndo();
+      if (!isPreventTrigger) {
+        context.triggerEvent('change', $editable.html());
+      }
+    };
+
+    /* jshint ignore:start */
+    // native commands(with execCommand), generate function for execCommand
+    var commands = ['bold', 'italic', 'underline', 'strikethrough', 'superscript', 'subscript',
+                    'justifyLeft', 'justifyCenter', 'justifyRight', 'justifyFull',
+                    'formatBlock', 'removeFormat',
+                    'backColor', 'foreColor', 'fontName'];
+
+    for (var idx = 0, len = commands.length; idx < len; idx ++) {
+      this[commands[idx]] = (function (sCmd) {
+        return function (value) {
+          beforeCommand();
+          document.execCommand(sCmd, false, value);
+          afterCommand(true);
+        };
+      })(commands[idx]);
+      context.memo('help.' + commands[idx], lang.help[commands[idx]]);
+    }
+    /* jshint ignore:end */
+
+    /**
+     * handle tab key
+     */
+    this.tab = function () {
+      var rng = this.createRange();
+      if (rng.isCollapsed() && rng.isOnCell()) {
+        table.tab(rng);
+      } else {
+        beforeCommand();
+        typing.insertTab(rng, options.tabSize);
+        afterCommand();
+      }
+    };
+    context.memo('help.tab', lang.help.tab);
+
+    /**
+     * handle shift+tab key
+     */
+    this.untab = function () {
+      var rng = this.createRange();
+      if (rng.isCollapsed() && rng.isOnCell()) {
+        table.tab(rng, true);
+      }
+    };
+    context.memo('help.untab', lang.help.untab);
+
+    /**
+     * run given function between beforeCommand and afterCommand
+     */
+    this.wrapCommand = function (fn) {
+      return function () {
+        beforeCommand();
+        fn.apply(self, arguments);
+        afterCommand();
+      };
+    };
+
+    /**
+     * insert paragraph
+     */
+    this.insertParagraph = this.wrapCommand(function () {
+      typing.insertParagraph(editable);
+    });
+    context.memo('help.insertParagraph', lang.help.insertParagraph);
+
+    this.insertOrderedList = this.wrapCommand(function () {
+      bullet.insertOrderedList(editable);
+    });
+    context.memo('help.insertOrderedList', lang.help.insertOrderedList);
+
+    this.insertUnorderedList = this.wrapCommand(function () {
+      bullet.insertUnorderedList(editable);
+    });
+    context.memo('help.insertUnorderedList', lang.help.insertUnorderedList);
+
+    this.indent = this.wrapCommand(function () {
+      bullet.indent(editable);
+    });
+    context.memo('help.indent', lang.help.indent);
+
+    this.outdent = this.wrapCommand(function () {
+      bullet.outdent(editable);
+    });
+    context.memo('help.outdent', lang.help.outdent);
+
+    /**
+     * insert image
+     *
+     * @param {String} src
+     * @param {String|Function} param
+     * @return {Promise}
+     */
+    this.insertImage = function (src, param) {
+      return async.createImage(src, param).then(function ($image) {
+        beforeCommand();
+
+        if (typeof param === 'function') {
+          param($image);
+        } else {
+          if (typeof param === 'string') {
+            $image.attr('data-filename', param);
+          }
+          $image.css('width', Math.min($editable.width(), $image.width()));
+        }
+
+        $image.show();
+        range.create(editable).insertNode($image[0]);
+        range.createFromNodeAfter($image[0]).select();
+        afterCommand();
+      }).fail(function (e) {
+        context.triggerEvent('image.upload.error', e);
+      });
+    };
+
+    /**
+     * insertImages
+     * @param {File[]} files
+     */
+    this.insertImages = function (files) {
+      $.each(files, function (idx, file) {
+        var filename = file.name;
+        if (options.maximumImageFileSize && options.maximumImageFileSize < file.size) {
+          context.triggerEvent('image.upload.error', lang.image.maximumFileSizeError);
+        } else {
+          async.readFileAsDataURL(file).then(function (dataURL) {
+            return self.insertImage(dataURL, filename);
+          }).fail(function () {
+            context.triggerEvent('image.upload.error');
+          });
+        }
+      });
+    };
+
+    /**
+     * insertImagesOrCallback
+     * @param {File[]} files
+     */
+    this.insertImagesOrCallback = function (files) {
+      var callbacks = options.callbacks;
+
+      // If onImageUpload options setted
+      if (callbacks.onImageUpload) {
+        context.triggerEvent('image.upload', files);
+      // else insert Image as dataURL
+      } else {
+        this.insertImages(files);
+      }
+    };
+
+    /**
+     * insertNode
+     * insert node
+     * @param {Node} node
+     */
+    this.insertNode = this.wrapCommand(function (node) {
+      var rng = this.createRange();
+      rng.insertNode(node);
+      range.createFromNodeAfter(node).select();
+    });
+
+    /**
+     * insert text
+     * @param {String} text
+     */
+    this.insertText = this.wrapCommand(function (text) {
+      var rng = this.createRange();
+      var textNode = rng.insertNode(dom.createText(text));
+      range.create(textNode, dom.nodeLength(textNode)).select();
+    });
+
+    /**
+     * return selected plain text
+     * @return {String} text
+     */
+    this.getSelectedText = function () {
+      var rng = this.createRange();
+
+      // if range on anchor, expand range with anchor
+      if (rng.isOnAnchor()) {
+        rng = range.createFromNode(dom.ancestor(rng.sc, dom.isAnchor));
+      }
+
+      return rng.toString();
+    };
+
+    /**
+     * paste HTML
+     * @param {String} markup
+     */
+    this.pasteHTML = this.wrapCommand(function (markup) {
+      var contents = this.createRange().pasteHTML(markup);
+      range.createFromNodeAfter(list.last(contents)).select();
+    });
+
+    /**
+     * formatBlock
+     *
+     * @param {String} tagName
+     */
+    this.formatBlock = this.wrapCommand(function (tagName) {
+      // [workaround] for MSIE, IE need `<`
+      tagName = agent.isMSIE ? '<' + tagName + '>' : tagName;
+      document.execCommand('FormatBlock', false, tagName);
+    });
+
+    this.formatPara = function () {
+      this.formatBlock('P');
+    };
+    context.memo('help.formatPara', lang.help.formatPara);
+
+    /* jshint ignore:start */
+    for (var idx = 1; idx <= 6; idx ++) {
+      this['formatH' + idx] = function (idx) {
+        return function () {
+          this.formatBlock('H' + idx);
+        };
+      }(idx);
+      context.memo('help.formatH'+idx, lang.help['formatH' + idx]);
+    };
+    /* jshint ignore:end */
+
+    /**
+     * fontSize
+     *
+     * @param {String} value - px
+     */
+    this.fontSize = function (value) {
+      var rng = this.createRange();
+
+      if (rng && rng.isCollapsed()) {
+        var spans = style.styleNodes(rng);
+        var firstSpan = list.head(spans);
+
+        $(spans).css({
+          'font-size': value + 'px'
+        });
+
+        // [workaround] added styled bogus span for style
+        //  - also bogus character needed for cursor position
+        if (firstSpan && !dom.nodeLength(firstSpan)) {
+          firstSpan.innerHTML = dom.ZERO_WIDTH_NBSP_CHAR;
+          range.createFromNodeAfter(firstSpan.firstChild).select();
+          $editable.data(KEY_BOGUS, firstSpan);
+        }
+      } else {
+        beforeCommand();
+        $(style.styleNodes(rng)).css({
+          'font-size': value + 'px'
+        });
+        afterCommand();
+      }
+    };
+
+    /**
+     * insert horizontal rule
+     */
+    this.insertHorizontalRule = this.wrapCommand(function () {
+      var hrNode = this.createRange().insertNode(dom.create('HR'));
+      if (hrNode.nextSibling) {
+        range.create(hrNode.nextSibling, 0).normalize().select();
+      }
+    });
+    context.memo('help.insertHorizontalRule', lang.help.insertHorizontalRule);
+
+    /**
+     * remove bogus node and character
+     */
+    this.removeBogus = function () {
+      var bogusNode = $editable.data(KEY_BOGUS);
+      if (!bogusNode) {
+        return;
+      }
+
+      var textNode = list.find(list.from(bogusNode.childNodes), dom.isText);
+
+      var bogusCharIdx = textNode.nodeValue.indexOf(dom.ZERO_WIDTH_NBSP_CHAR);
+      if (bogusCharIdx !== -1) {
+        textNode.deleteData(bogusCharIdx, 1);
+      }
+
+      if (dom.isEmpty(bogusNode)) {
+        dom.remove(bogusNode);
+      }
+
+      $editable.removeData(KEY_BOGUS);
+    };
+
+    /**
+     * lineHeight
+     * @param {String} value
+     */
+    this.lineHeight = this.wrapCommand(function (value) {
+      style.stylePara(this.createRange(), {
+        lineHeight: value
+      });
+    });
+
+    /**
+     * unlink
+     *
+     * @type command
+     */
+    this.unlink = function () {
+      var rng = this.createRange();
+      if (rng.isOnAnchor()) {
+        var anchor = dom.ancestor(rng.sc, dom.isAnchor);
+        rng = range.createFromNode(anchor);
+        rng.select();
+
+        beforeCommand();
+        document.execCommand('unlink');
+        afterCommand();
+      }
+    };
+
+    /**
+     * create link (command)
+     *
+     * @param {Object} linkInfo
+     */
+    this.createLink = this.wrapCommand(function (linkInfo) {
+      var linkUrl = linkInfo.url;
+      var linkText = linkInfo.text;
+      var isNewWindow = linkInfo.isNewWindow;
+      var rng = linkInfo.range || this.createRange();
+      var isTextChanged = rng.toString() !== linkText;
+
+      // handle spaced urls from input
+      if (typeof linkUrl === 'string') {
+        linkUrl = linkUrl.trim();
+      }
+
+      if (options.onCreateLink) {
+        linkUrl = options.onCreateLink(linkUrl);
+      }
+
+      var anchors = [];
+      if (isTextChanged) {
+        rng = rng.deleteContents();
+        var anchor = rng.insertNode($('<A>' + linkText + '</A>')[0]);
+        anchors.push(anchor);
+      } else {
+        anchors = style.styleNodes(rng, {
+          nodeName: 'A',
+          expandClosestSibling: true,
+          onlyPartialContains: true
+        });
+      }
+
+      $.each(anchors, function (idx, anchor) {
+        // if url doesn't match an URL schema, set http:// as default
+        linkUrl = /^[A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?/.test(linkUrl) ?
+          linkUrl : 'http://' + linkUrl;
+
+        $(anchor).attr('href', linkUrl);
+        if (isNewWindow) {
+          $(anchor).attr('target', '_blank');
+        } else {
+          $(anchor).removeAttr('target');
+        }
+      });
+
+      var startRange = range.createFromNodeBefore(list.head(anchors));
+      var startPoint = startRange.getStartPoint();
+      var endRange = range.createFromNodeAfter(list.last(anchors));
+      var endPoint = endRange.getEndPoint();
+
+      range.create(
+        startPoint.node,
+        startPoint.offset,
+        endPoint.node,
+        endPoint.offset
+      ).select();
+    });
+
+    /**
+     * returns link info
+     *
+     * @return {Object}
+     * @return {WrappedRange} return.range
+     * @return {String} return.text
+     * @return {Boolean} [return.isNewWindow=true]
+     * @return {String} [return.url=""]
+     */
+    this.getLinkInfo = function () {
+      var rng = this.createRange().expand(dom.isAnchor);
+
+      // Get the first anchor on range(for edit).
+      var $anchor = $(list.head(rng.nodes(dom.isAnchor)));
+
+      return {
+        range: rng,
+        text: rng.toString(),
+        isNewWindow: $anchor.length ? $anchor.attr('target') === '_blank' : false,
+        url: $anchor.length ? $anchor.attr('href') : ''
+      };
+    };
+
+    /**
+     * setting color
+     *
+     * @param {Object} sObjColor  color code
+     * @param {String} sObjColor.foreColor foreground color
+     * @param {String} sObjColor.backColor background color
+     */
+    this.color = this.wrapCommand(function (colorInfo) {
+      var foreColor = colorInfo.foreColor;
+      var backColor = colorInfo.backColor;
+
+      if (foreColor) { document.execCommand('foreColor', false, foreColor); }
+      if (backColor) { document.execCommand('backColor', false, backColor); }
+    });
+
+    /**
+     * insert Table
+     *
+     * @param {String} dimension of table (ex : "5x5")
+     */
+    this.insertTable = this.wrapCommand(function (dim) {
+      var dimension = dim.split('x');
+
+      var rng = this.createRange().deleteContents();
+      rng.insertNode(table.createTable(dimension[0], dimension[1], options));
+    });
+
+    /**
+     * float me
+     *
+     * @param {String} value
+     */
+    this.floatMe = this.wrapCommand(function (value) {
+      var $target = $(this.restoreTarget());
+      $target.css('float', value);
+    });
+
+    /**
+     * resize overlay element
+     * @param {String} value
+     */
+    this.resize = this.wrapCommand(function (value) {
+      var $target = $(this.restoreTarget());
+      $target.css({
+        width: value * 100 + '%',
+        height: ''
+      });
+    });
+
+    /**
+     * @param {Position} pos
+     * @param {jQuery} $target - target element
+     * @param {Boolean} [bKeepRatio] - keep ratio
+     */
+    this.resizeTo = function (pos, $target, bKeepRatio) {
+      var imageSize;
+      if (bKeepRatio) {
+        var newRatio = pos.y / pos.x;
+        var ratio = $target.data('ratio');
+        imageSize = {
+          width: ratio > newRatio ? pos.x : pos.y / ratio,
+          height: ratio > newRatio ? pos.x * ratio : pos.y
+        };
+      } else {
+        imageSize = {
+          width: pos.x,
+          height: pos.y
+        };
+      }
+
+      $target.css(imageSize);
+    };
+
+    /**
+     * remove media object
+     */
+    this.removeMedia = this.wrapCommand(function () {
+      var $target = $(this.restoreTarget()).detach();
+      context.triggerEvent('media.delete', $target, $editable);
+    });
+
+    /**
+     * returns whether editable area has focus or not.
+     */
+    this.hasFocus = function () {
+      return $editable.is(':focus');
+    };
+
+    /**
+     * set focus
+     */
+    this.focus = function () {
+      // [workaround] Screen will move when page is scolled in IE.
+      //  - do focus when not focused
+      if (!this.hasFocus()) {
+        $editable.focus();
+      }
+    };
+
+    /**
+     * returns whether contents is empty or not.
+     * @return {Boolean}
+     */
+    this.isEmpty = function () {
+      return dom.isEmpty($editable[0]) || dom.emptyPara === $editable.html();
+    };
+
+    /**
+     * Removes all contents and restores the editable instance to an _emptyPara_.
+     */
+    this.empty = function () {
+      context.invoke('code', dom.emptyPara);
+    };
+  };
+
+  var Clipboard = function (context) {
+    var self = this;
+
+    var $editable = context.layoutInfo.editable;
+
+    this.events = {
+      'summernote.keydown': function (we, e) {
+        if (self.needKeydownHook()) {
+          if ((e.ctrlKey || e.metaKey) && e.keyCode === key.code.V) {
+            context.invoke('editor.saveRange');
+            self.$paste.focus();
+
+            setTimeout(function () {
+              self.pasteByHook();
+            }, 0);
+          }
+        }
+      }
+    };
+
+    this.needKeydownHook = function () {
+      return (agent.isMSIE && agent.browserVersion > 10) || agent.isFF;
+    };
+
+    this.initialize = function () {
+      // [workaround] getting image from clipboard
+      //  - IE11 and Firefox: CTRL+v hook
+      //  - Webkit: event.clipboardData
+      if (this.needKeydownHook()) {
+        this.$paste = $('<div tabindex="-1" />').attr('contenteditable', true).css({
+          position: 'absolute',
+          left: -100000,
+          opacity: 0
+        });
+        $editable.before(this.$paste);
+
+        this.$paste.on('paste', function (event) {
+          context.triggerEvent('paste', event);
+        });
+      } else {
+        $editable.on('paste', this.pasteByEvent);
+      }
+    };
+
+    this.destroy = function () {
+      if (this.needKeydownHook()) {
+        this.$paste.remove();
+        this.$paste = null;
+      }
+    };
+
+    this.pasteByHook = function () {
+      var node = this.$paste[0].firstChild;
+
+      if (dom.isImg(node)) {
+        var dataURI = node.src;
+        var decodedData = atob(dataURI.split(',')[1]);
+        var array = new Uint8Array(decodedData.length);
+        for (var i = 0; i < decodedData.length; i++) {
+          array[i] = decodedData.charCodeAt(i);
+        }
+
+        var blob = new Blob([array], { type: 'image/png' });
+        blob.name = 'clipboard.png';
+
+        context.invoke('editor.restoreRange');
+        context.invoke('editor.focus');
+        context.invoke('editor.insertImagesOrCallback', [blob]);
+      } else {
+        var pasteContent = $('<div />').html(this.$paste.html()).html();
+        context.invoke('editor.restoreRange');
+        context.invoke('editor.focus');
+
+        if (pasteContent) {
+          context.invoke('editor.pasteHTML', pasteContent);
+        }
+      }
+
+      this.$paste.empty();
+    };
+
+    /**
+     * paste by clipboard event
+     *
+     * @param {Event} event
+     */
+    this.pasteByEvent = function (event) {
+      var clipboardData = event.originalEvent.clipboardData;
+      if (clipboardData && clipboardData.items && clipboardData.items.length) {
+        var item = list.head(clipboardData.items);
+        if (item.kind === 'file' && item.type.indexOf('image/') !== -1) {
+          context.invoke('editor.insertImagesOrCallback', [item.getAsFile()]);
+        }
+        context.invoke('editor.afterCommand');
+      }
+    };
+  };
+
+  var Dropzone = function (context) {
+    var $document = $(document);
+    var $editor = context.layoutInfo.editor;
+    var $editable = context.layoutInfo.editable;
+    var options = context.options;
+    var lang = options.langInfo;
+    var documentEventHandlers = {};
+
+    var $dropzone = $([
+      '<div class="note-dropzone">',
+      '  <div class="note-dropzone-message"/>',
+      '</div>'
+    ].join('')).prependTo($editor);
+
+    var detachDocumentEvent = function () {
+      Object.keys(documentEventHandlers).forEach(function (key) {
+        $document.off(key.substr(2).toLowerCase(), documentEventHandlers[key]);
+      });
+      documentEventHandlers = {};
+    };
+
+    /**
+     * attach Drag and Drop Events
+     */
+    this.initialize = function () {
+      if (options.disableDragAndDrop) {
+        // prevent default drop event
+        documentEventHandlers.onDrop = function (e) {
+          e.preventDefault();
+        };
+        $document.on('drop', documentEventHandlers.onDrop);
+      } else {
+        this.attachDragAndDropEvent();
+      }
+    };
+
+    /**
+     * attach Drag and Drop Events
+     */
+    this.attachDragAndDropEvent = function () {
+      var collection = $(),
+          $dropzoneMessage = $dropzone.find('.note-dropzone-message');
+
+      documentEventHandlers.onDragenter = function (e) {
+        var isCodeview = context.invoke('codeview.isActivated');
+        var hasEditorSize = $editor.width() > 0 && $editor.height() > 0;
+        if (!isCodeview && !collection.length && hasEditorSize) {
+          $editor.addClass('dragover');
+          $dropzone.width($editor.width());
+          $dropzone.height($editor.height());
+          $dropzoneMessage.text(lang.image.dragImageHere);
+        }
+        collection = collection.add(e.target);
+      };
+
+      documentEventHandlers.onDragleave = function (e) {
+        collection = collection.not(e.target);
+        if (!collection.length) {
+          $editor.removeClass('dragover');
+        }
+      };
+
+      documentEventHandlers.onDrop = function () {
+        collection = $();
+        $editor.removeClass('dragover');
+      };
+
+      // show dropzone on dragenter when dragging a object to document
+      // -but only if the editor is visible, i.e. has a positive width and height
+      $document.on('dragenter', documentEventHandlers.onDragenter)
+        .on('dragleave', documentEventHandlers.onDragleave)
+        .on('drop', documentEventHandlers.onDrop);
+
+      // change dropzone's message on hover.
+      $dropzone.on('dragenter', function () {
+        $dropzone.addClass('hover');
+        $dropzoneMessage.text(lang.image.dropImage);
+      }).on('dragleave', function () {
+        $dropzone.removeClass('hover');
+        $dropzoneMessage.text(lang.image.dragImageHere);
+      });
+
+      // attach dropImage
+      $dropzone.on('drop', function (event) {
+        var dataTransfer = event.originalEvent.dataTransfer;
+
+        if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
+          event.preventDefault();
+          $editable.focus();
+          context.invoke('editor.insertImagesOrCallback', dataTransfer.files);
+        } else {
+          $.each(dataTransfer.types, function (idx, type) {
+            var content = dataTransfer.getData(type);
+
+            if (type.toLowerCase().indexOf('text') > -1) {
+              context.invoke('editor.pasteHTML', content);
+            } else {
+              $(content).each(function () {
+                context.invoke('editor.insertNode', this);
+              });
+            }
+          });
+        }
+      }).on('dragover', false); // prevent default dragover event
+    };
+
+    this.destroy = function () {
+      detachDocumentEvent();
+    };
+  };
+
+
+  var CodeMirror;
+  if (agent.hasCodeMirror) {
+    if (agent.isSupportAmd) {
+      require(['codemirror'], function (cm) {
+        CodeMirror = cm;
+      });
+    } else {
+      CodeMirror = window.CodeMirror;
+    }
+  }
+
+  /**
+   * @class Codeview
+   */
+  var Codeview = function (context) {
+    var $editor = context.layoutInfo.editor;
+    var $editable = context.layoutInfo.editable;
+    var $codable = context.layoutInfo.codable;
+    var options = context.options;
+
+    this.sync = function () {
+      var isCodeview = this.isActivated();
+      if (isCodeview && agent.hasCodeMirror) {
+        $codable.data('cmEditor').save();
+      }
+    };
+
+    /**
+     * @return {Boolean}
+     */
+    this.isActivated = function () {
+      return $editor.hasClass('codeview');
+    };
+
+    /**
+     * toggle codeview
+     */
+    this.toggle = function () {
+      if (this.isActivated()) {
+        this.deactivate();
+      } else {
+        this.activate();
+      }
+      context.triggerEvent('codeview.toggled');
+    };
+
+    /**
+     * activate code view
+     */
+    this.activate = function () {
+      $codable.val(dom.html($editable, options.prettifyHtml));
+      $codable.height($editable.height());
+
+      context.invoke('toolbar.updateCodeview', true);
+      $editor.addClass('codeview');
+      $codable.focus();
+
+      // activate CodeMirror as codable
+      if (agent.hasCodeMirror) {
+        var cmEditor = CodeMirror.fromTextArea($codable[0], options.codemirror);
+
+        // CodeMirror TernServer
+        if (options.codemirror.tern) {
+          var server = new CodeMirror.TernServer(options.codemirror.tern);
+          cmEditor.ternServer = server;
+          cmEditor.on('cursorActivity', function (cm) {
+            server.updateArgHints(cm);
+          });
+        }
+
+        // CodeMirror hasn't Padding.
+        cmEditor.setSize(null, $editable.outerHeight());
+        $codable.data('cmEditor', cmEditor);
+      }
+    };
+
+    /**
+     * deactivate code view
+     */
+    this.deactivate = function () {
+      // deactivate CodeMirror as codable
+      if (agent.hasCodeMirror) {
+        var cmEditor = $codable.data('cmEditor');
+        $codable.val(cmEditor.getValue());
+        cmEditor.toTextArea();
+      }
+
+      var value = dom.value($codable, options.prettifyHtml) || dom.emptyPara;
+      var isChange = $editable.html() !== value;
+
+      $editable.html(value);
+      $editable.height(options.height ? $codable.height() : 'auto');
+      $editor.removeClass('codeview');
+
+      if (isChange) {
+        context.triggerEvent('change', $editable.html(), $editable);
+      }
+
+      $editable.focus();
+
+      context.invoke('toolbar.updateCodeview', false);
+    };
+
+    this.destroy = function () {
+      if (this.isActivated()) {
+        this.deactivate();
+      }
+    };
+  };
+
+  var EDITABLE_PADDING = 24;
+
+  var Statusbar = function (context) {
+    var $document = $(document);
+    var $statusbar = context.layoutInfo.statusbar;
+    var $editable = context.layoutInfo.editable;
+    var options = context.options;
+
+    this.initialize = function () {
+      if (options.airMode || options.disableResizeEditor) {
+        return;
+      }
+
+      $statusbar.on('mousedown', function (event) {
+        event.preventDefault();
+        event.stopPropagation();
+
+        var editableTop = $editable.offset().top - $document.scrollTop();
+
+        $document.on('mousemove', function (event) {
+          var height = event.clientY - (editableTop + EDITABLE_PADDING);
+
+          height = (options.minheight > 0) ? Math.max(height, options.minheight) : height;
+          height = (options.maxHeight > 0) ? Math.min(height, options.maxHeight) : height;
+
+          $editable.height(height);
+        }).one('mouseup', function () {
+          $document.off('mousemove');
+        });
+      });
+    };
+
+    this.destroy = function () {
+      $statusbar.off();
+      $statusbar.remove();
+    };
+  };
+
+  var Fullscreen = function (context) {
+    var $editor = context.layoutInfo.editor;
+    var $toolbar = context.layoutInfo.toolbar;
+    var $editable = context.layoutInfo.editable;
+    var $codable = context.layoutInfo.codable;
+
+    var $window = $(window);
+    var $scrollbar = $('html, body');
+
+    /**
+     * toggle fullscreen
+     */
+    this.toggle = function () {
+      var resize = function (size) {
+        $editable.css('height', size.h);
+        $codable.css('height', size.h);
+        if ($codable.data('cmeditor')) {
+          $codable.data('cmeditor').setsize(null, size.h);
+        }
+      };
+
+      $editor.toggleClass('fullscreen');
+      if (this.isFullscreen()) {
+        $editable.data('orgHeight', $editable.css('height'));
+
+        $window.on('resize', function () {
+          resize({
+            h: $window.height() - $toolbar.outerHeight()
+          });
+        }).trigger('resize');
+
+        $scrollbar.css('overflow', 'hidden');
+      } else {
+        $window.off('resize');
+        resize({
+          h: $editable.data('orgHeight')
+        });
+        $scrollbar.css('overflow', 'visible');
+      }
+
+      context.invoke('toolbar.updateFullscreen', this.isFullscreen());
+    };
+
+    this.isFullscreen = function () {
+      return $editor.hasClass('fullscreen');
+    };
+  };
+
+  var Handle = function (context) {
+    var self = this;
+
+    var $document = $(document);
+    var $editingArea = context.layoutInfo.editingArea;
+    var options = context.options;
+
+    this.events = {
+      'summernote.mousedown': function (we, e) {
+        if (self.update(e.target)) {
+          e.preventDefault();
+        }
+      },
+      'summernote.keyup summernote.scroll summernote.change summernote.dialog.shown': function () {
+        self.update();
+      }
+    };
+
+    this.initialize = function () {
+      this.$handle = $([
+        '<div class="note-handle">',
+        '<div class="note-control-selection">',
+        '<div class="note-control-selection-bg"></div>',
+        '<div class="note-control-holder note-control-nw"></div>',
+        '<div class="note-control-holder note-control-ne"></div>',
+        '<div class="note-control-holder note-control-sw"></div>',
+        '<div class="',
+        (options.disableResizeImage ? 'note-control-holder' : 'note-control-sizing'),
+        ' note-control-se"></div>',
+        (options.disableResizeImage ? '' : '<div class="note-control-selection-info"></div>'),
+        '</div>',
+        '</div>'
+      ].join('')).prependTo($editingArea);
+
+      this.$handle.on('mousedown', function (event) {
+        if (dom.isControlSizing(event.target)) {
+          event.preventDefault();
+          event.stopPropagation();
+
+          var $target = self.$handle.find('.note-control-selection').data('target'),
+              posStart = $target.offset(),
+              scrollTop = $document.scrollTop();
+
+          $document.on('mousemove', function (event) {
+            context.invoke('editor.resizeTo', {
+              x: event.clientX - posStart.left,
+              y: event.clientY - (posStart.top - scrollTop)
+            }, $target, !event.shiftKey);
+
+            self.update($target[0]);
+          }).one('mouseup', function (e) {
+            e.preventDefault();
+            $document.off('mousemove');
+            context.invoke('editor.afterCommand');
+          });
+
+          if (!$target.data('ratio')) { // original ratio.
+            $target.data('ratio', $target.height() / $target.width());
+          }
+        }
+      });
+    };
+
+    this.destroy = function () {
+      this.$handle.remove();
+    };
+
+    this.update = function (target) {
+      var isImage = dom.isImg(target);
+      var $selection = this.$handle.find('.note-control-selection');
+
+      context.invoke('imagePopover.update', target);
+
+      if (isImage) {
+        var $image = $(target);
+        var pos = $image.position();
+
+        // include margin
+        var imageSize = {
+          w: $image.outerWidth(true),
+          h: $image.outerHeight(true)
+        };
+
+        $selection.css({
+          display: 'block',
+          left: pos.left,
+          top: pos.top,
+          width: imageSize.w,
+          height: imageSize.h
+        }).data('target', $image); // save current image element.
+
+        var sizingText = imageSize.w + 'x' + imageSize.h;
+        $selection.find('.note-control-selection-info').text(sizingText);
+        context.invoke('editor.saveTarget', target);
+      } else {
+        this.hide();
+      }
+
+      return isImage;
+    };
+
+    /**
+     * hide
+     *
+     * @param {jQuery} $handle
+     */
+    this.hide = function () {
+      context.invoke('editor.clearTarget');
+      this.$handle.children().hide();
+    };
+  };
+
+  var AutoLink = function (context) {
+    var self = this;
+    var defaultScheme = 'http://';
+    var linkPattern = /^([A-Za-z][A-Za-z0-9+-.]*\:[\/\/]?|mailto:[A-Z0-9._%+-]+@)?(www\.)?(.+)$/i;
+
+    this.events = {
+      'summernote.keyup': function (we, e) {
+        if (!e.isDefaultPrevented()) {
+          self.handleKeyup(e);
+        }
+      },
+      'summernote.keydown': function (we, e) {
+        self.handleKeydown(e);
+      }
+    };
+
+    this.initialize = function () {
+      this.lastWordRange = null;
+    };
+
+    this.destroy = function () {
+      this.lastWordRange = null;
+    };
+
+    this.replace = function () {
+      if (!this.lastWordRange) {
+        return;
+      }
+
+      var keyword = this.lastWordRange.toString();
+      var match = keyword.match(linkPattern);
+
+      if (match && (match[1] || match[2])) {
+        var link = match[1] ? keyword : defaultScheme + keyword;
+        var node = $('<a />').html(keyword).attr('href', link)[0];
+
+        this.lastWordRange.insertNode(node);
+        this.lastWordRange = null;
+        context.invoke('editor.focus');
+      }
+
+    };
+
+    this.handleKeydown = function (e) {
+      if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
+        var wordRange = context.invoke('editor.createRange').getWordRange();
+        this.lastWordRange = wordRange;
+      }
+    };
+
+    this.handleKeyup = function (e) {
+      if (list.contains([key.code.ENTER, key.code.SPACE], e.keyCode)) {
+        this.replace();
+      }
+    };
+  };
+
+  /**
+   * textarea auto sync.
+   */
+  var AutoSync = function (context) {
+    var $note = context.layoutInfo.note;
+
+    this.events = {
+      'summernote.change': function () {
+        $note.val(context.invoke('code'));
+      }
+    };
+
+    this.shouldInitialize = function () {
+      return dom.isTextarea($note[0]);
+    };
+  };
+
+  var Placeholder = function (context) {
+    var self = this;
+    var $editingArea = context.layoutInfo.editingArea;
+    var options = context.options;
+
+    this.events = {
+      'summernote.init summernote.change': function () {
+        self.update();
+      },
+      'summernote.codeview.toggled': function () {
+        self.update();
+      }
+    };
+
+    this.shouldInitialize = function () {
+      return !!options.placeholder;
+    };
+
+    this.initialize = function () {
+      this.$placeholder = $('<div class="note-placeholder">');
+      this.$placeholder.on('click', function () {
+        context.invoke('focus');
+      }).text(options.placeholder).prependTo($editingArea);
+    };
+
+    this.destroy = function () {
+      this.$placeholder.remove();
+    };
+
+    this.update = function () {
+      var isShow = !context.invoke('codeview.isActivated') && context.invoke('editor.isEmpty');
+      this.$placeholder.toggle(isShow);
+    };
+  };
+
+  var Buttons = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var $toolbar = context.layoutInfo.toolbar;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    var invertedKeyMap = func.invertObject(options.keyMap[agent.isMac ? 'mac' : 'pc']);
+
+    var representShortcut = this.representShortcut = function (editorMethod) {
+      var shortcut = invertedKeyMap[editorMethod];
+      if (!options.shortcuts || !shortcut) {
+        return '';
+      }
+      
+      if (agent.isMac) {
+        shortcut = shortcut.replace('CMD', '⌘').replace('SHIFT', '⇧');
+      }
+
+      shortcut = shortcut.replace('BACKSLASH', '\\')
+                         .replace('SLASH', '/')
+                         .replace('LEFTBRACKET', '[')
+                         .replace('RIGHTBRACKET', ']');
+
+      return ' (' + shortcut + ')';
+    };
+
+    this.initialize = function () {
+      this.addToolbarButtons();
+      this.addImagePopoverButtons();
+      this.addLinkPopoverButtons();
+      this.fontInstalledMap = {};
+    };
+
+    this.destroy = function () {
+      delete this.fontInstalledMap;
+    };
+
+    this.isFontInstalled = function (name) {
+      if (!self.fontInstalledMap.hasOwnProperty(name)) {
+        self.fontInstalledMap[name] = agent.isFontInstalled(name) ||
+          list.contains(options.fontNamesIgnoreCheck, name);
+      }
+
+      return self.fontInstalledMap[name];
+    };
+
+    this.addToolbarButtons = function () {
+      context.memo('button.style', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: ui.icon(options.icons.magic) + ' ' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.style.style,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdown({
+            className: 'dropdown-style',
+            items: context.options.styleTags,
+            template: function (item) {
+
+              if (typeof item === 'string') {
+                item = { tag: item, title: (lang.style.hasOwnProperty(item) ? lang.style[item] : item) };
+              }
+
+              var tag = item.tag;
+              var title = item.title;
+              var style = item.style ? ' style="' + item.style + '" ' : '';
+              var className = item.className ? ' class="' + item.className + '"' : '';
+
+              return '<' + tag + style + className + '>' + title + '</' + tag +  '>';
+            },
+            click: context.createInvokeHandler('editor.formatBlock')
+          })
+        ]).render();
+      });
+
+      context.memo('button.bold', function () {
+        return ui.button({
+          className: 'note-btn-bold',
+          contents: ui.icon(options.icons.bold),
+          tooltip: lang.font.bold + representShortcut('bold'),
+          click: context.createInvokeHandler('editor.bold')
+        }).render();
+      });
+
+      context.memo('button.italic', function () {
+        return ui.button({
+          className: 'note-btn-italic',
+          contents: ui.icon(options.icons.italic),
+          tooltip: lang.font.italic + representShortcut('italic'),
+          click: context.createInvokeHandler('editor.italic')
+        }).render();
+      });
+
+      context.memo('button.underline', function () {
+        return ui.button({
+          className: 'note-btn-underline',
+          contents: ui.icon(options.icons.underline),
+          tooltip: lang.font.underline + representShortcut('underline'),
+          click: context.createInvokeHandler('editor.underline')
+        }).render();
+      });
+
+      context.memo('button.clear', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.eraser),
+          tooltip: lang.font.clear + representShortcut('removeFormat'),
+          click: context.createInvokeHandler('editor.removeFormat')
+        }).render();
+      });
+
+      context.memo('button.strikethrough', function () {
+        return ui.button({
+          className: 'note-btn-strikethrough',
+          contents: ui.icon(options.icons.strikethrough),
+          tooltip: lang.font.strikethrough + representShortcut('strikethrough'),
+          click: context.createInvokeHandler('editor.strikethrough')
+        }).render();
+      });
+
+      context.memo('button.superscript', function () {
+        return ui.button({
+          className: 'note-btn-superscript',
+          contents: ui.icon(options.icons.superscript),
+          tooltip: lang.font.superscript,
+          click: context.createInvokeHandler('editor.superscript')
+        }).render();
+      });
+
+      context.memo('button.subscript', function () {
+        return ui.button({
+          className: 'note-btn-subscript',
+          contents: ui.icon(options.icons.subscript),
+          tooltip: lang.font.subscript,
+          click: context.createInvokeHandler('editor.subscript')
+        }).render();
+      });
+
+      context.memo('button.fontname', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: '<span class="note-current-fontname"/> ' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.font.name,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdownCheck({
+            className: 'dropdown-fontname',
+            checkClassName: options.icons.menuCheck,
+            items: options.fontNames.filter(self.isFontInstalled),
+            template: function (item) {
+              return '<span style="font-family:' + item + '">' + item + '</span>';
+            },
+            click: context.createInvokeHandler('editor.fontName')
+          })
+        ]).render();
+      });
+
+      context.memo('button.fontsize', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: '<span class="note-current-fontsize"/>' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.font.size,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdownCheck({
+            className: 'dropdown-fontsize',
+            checkClassName: options.icons.menuCheck,
+            items: options.fontSizes,
+            click: context.createInvokeHandler('editor.fontSize')
+          })
+        ]).render();
+      });
+
+      context.memo('button.color', function () {
+        return ui.buttonGroup({
+          className: 'note-color',
+          children: [
+            ui.button({
+              className: 'note-current-color-button',
+              contents: ui.icon(options.icons.font + ' note-recent-color'),
+              tooltip: lang.color.recent,
+              click: function (e) {
+                var $button = $(e.currentTarget);
+                context.invoke('editor.color', {
+                  backColor: $button.attr('data-backColor'),
+                  foreColor: $button.attr('data-foreColor')
+                });
+              },
+              callback: function ($button) {
+                var $recentColor = $button.find('.note-recent-color');
+                $recentColor.css('background-color', '#FFFF00');
+                $button.attr('data-backColor', '#FFFF00');
+              }
+            }),
+            ui.button({
+              className: 'dropdown-toggle',
+              contents: ui.icon(options.icons.caret, 'span'),
+              tooltip: lang.color.more,
+              data: {
+                toggle: 'dropdown'
+              }
+            }),
+            ui.dropdown({
+              items: [
+                '<li>',
+                '<div class="btn-group">',
+                '  <div class="note-palette-title">' + lang.color.background + '</div>',
+                '  <div>',
+                '    <button type="button" class="note-color-reset btn btn-default" data-event="backColor" data-value="inherit">',
+                lang.color.transparent,
+                '    </button>',
+                '  </div>',
+                '  <div class="note-holder" data-event="backColor"/>',
+                '</div>',
+                '<div class="btn-group">',
+                '  <div class="note-palette-title">' + lang.color.foreground + '</div>',
+                '  <div>',
+                '    <button type="button" class="note-color-reset btn btn-default" data-event="removeFormat" data-value="foreColor">',
+                lang.color.resetToDefault,
+                '    </button>',
+                '  </div>',
+                '  <div class="note-holder" data-event="foreColor"/>',
+                '</div>',
+                '</li>'
+              ].join(''),
+              callback: function ($dropdown) {
+                $dropdown.find('.note-holder').each(function () {
+                  var $holder = $(this);
+                  $holder.append(ui.palette({
+                    colors: options.colors,
+                    eventName: $holder.data('event')
+                  }).render());
+                });
+              },
+              click: function (event) {
+                var $button = $(event.target);
+                var eventName = $button.data('event');
+                var value = $button.data('value');
+
+                if (eventName && value) {
+                  var key = eventName === 'backColor' ? 'background-color' : 'color';
+                  var $color = $button.closest('.note-color').find('.note-recent-color');
+                  var $currentButton = $button.closest('.note-color').find('.note-current-color-button');
+
+                  $color.css(key, value);
+                  $currentButton.attr('data-' + eventName, value);
+                  context.invoke('editor.' + eventName, value);
+                }
+              }
+            })
+          ]
+        }).render();
+      });
+
+      context.memo('button.ul',  function () {
+        return ui.button({
+          contents: ui.icon(options.icons.unorderedlist),
+          tooltip: lang.lists.unordered + representShortcut('insertUnorderedList'),
+          click: context.createInvokeHandler('editor.insertUnorderedList')
+        }).render();
+      });
+
+      context.memo('button.ol', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.orderedlist),
+          tooltip: lang.lists.ordered + representShortcut('insertOrderedList'),
+          click:  context.createInvokeHandler('editor.insertOrderedList')
+        }).render();
+      });
+
+      var justifyLeft = ui.button({
+        contents: ui.icon(options.icons.alignLeft),
+        tooltip: lang.paragraph.left + representShortcut('justifyLeft'),
+        click: context.createInvokeHandler('editor.justifyLeft')
+      });
+
+      var justifyCenter = ui.button({
+        contents: ui.icon(options.icons.alignCenter),
+        tooltip: lang.paragraph.center + representShortcut('justifyCenter'),
+        click: context.createInvokeHandler('editor.justifyCenter')
+      });
+
+      var justifyRight = ui.button({
+        contents: ui.icon(options.icons.alignRight),
+        tooltip: lang.paragraph.right + representShortcut('justifyRight'),
+        click: context.createInvokeHandler('editor.justifyRight')
+      });
+
+      var justifyFull = ui.button({
+        contents: ui.icon(options.icons.alignJustify),
+        tooltip: lang.paragraph.justify + representShortcut('justifyFull'),
+        click: context.createInvokeHandler('editor.justifyFull')
+      });
+
+      var outdent = ui.button({
+        contents: ui.icon(options.icons.outdent),
+        tooltip: lang.paragraph.outdent + representShortcut('outdent'),
+        click: context.createInvokeHandler('editor.outdent')
+      });
+
+      var indent = ui.button({
+        contents: ui.icon(options.icons.indent),
+        tooltip: lang.paragraph.indent + representShortcut('indent'),
+        click: context.createInvokeHandler('editor.indent')
+      });
+
+      context.memo('button.justifyLeft', func.invoke(justifyLeft, 'render'));
+      context.memo('button.justifyCenter', func.invoke(justifyCenter, 'render'));
+      context.memo('button.justifyRight', func.invoke(justifyRight, 'render'));
+      context.memo('button.justifyFull', func.invoke(justifyFull, 'render'));
+      context.memo('button.outdent', func.invoke(outdent, 'render'));
+      context.memo('button.indent', func.invoke(indent, 'render'));
+
+      context.memo('button.paragraph', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: ui.icon(options.icons.alignLeft) + ' ' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.paragraph.paragraph,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdown([
+            ui.buttonGroup({
+              className: 'note-align',
+              children: [justifyLeft, justifyCenter, justifyRight, justifyFull]
+            }),
+            ui.buttonGroup({
+              className: 'note-list',
+              children: [outdent, indent]
+            })
+          ])
+        ]).render();
+      });
+
+      context.memo('button.height', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: ui.icon(options.icons.textHeight) + ' ' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.font.height,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdownCheck({
+            items: options.lineHeights,
+            checkClassName: options.icons.menuCheck,
+            className: 'dropdown-line-height',
+            click: context.createInvokeHandler('editor.lineHeight')
+          })
+        ]).render();
+      });
+
+      context.memo('button.table', function () {
+        return ui.buttonGroup([
+          ui.button({
+            className: 'dropdown-toggle',
+            contents: ui.icon(options.icons.table) + ' ' + ui.icon(options.icons.caret, 'span'),
+            tooltip: lang.table.table,
+            data: {
+              toggle: 'dropdown'
+            }
+          }),
+          ui.dropdown({
+            className: 'note-table',
+            items: [
+              '<div class="note-dimension-picker">',
+              '  <div class="note-dimension-picker-mousecatcher" data-event="insertTable" data-value="1x1"/>',
+              '  <div class="note-dimension-picker-highlighted"/>',
+              '  <div class="note-dimension-picker-unhighlighted"/>',
+              '</div>',
+              '<div class="note-dimension-display">1 x 1</div>'
+            ].join('')
+          })
+        ], {
+          callback: function ($node) {
+            var $catcher = $node.find('.note-dimension-picker-mousecatcher');
+            $catcher.css({
+              width: options.insertTableMaxSize.col + 'em',
+              height: options.insertTableMaxSize.row + 'em'
+            }).mousedown(context.createInvokeHandler('editor.insertTable'))
+              .on('mousemove', self.tableMoveHandler);
+          }
+        }).render();
+      });
+
+      context.memo('button.link', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.link),
+          tooltip: lang.link.link + representShortcut('linkDialog.show'),
+          click: context.createInvokeHandler('linkDialog.show')
+        }).render();
+      });
+
+      context.memo('button.picture', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.picture),
+          tooltip: lang.image.image,
+          click: context.createInvokeHandler('imageDialog.show')
+        }).render();
+      });
+
+      context.memo('button.video', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.video),
+          tooltip: lang.video.video,
+          click: context.createInvokeHandler('videoDialog.show')
+        }).render();
+      });
+
+      context.memo('button.hr', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.minus),
+          tooltip: lang.hr.insert + representShortcut('insertHorizontalRule'),
+          click: context.createInvokeHandler('editor.insertHorizontalRule')
+        }).render();
+      });
+
+      context.memo('button.fullscreen', function () {
+        return ui.button({
+          className: 'btn-fullscreen',
+          contents: ui.icon(options.icons.arrowsAlt),
+          tooltip: lang.options.fullscreen,
+          click: context.createInvokeHandler('fullscreen.toggle')
+        }).render();
+      });
+
+      context.memo('button.codeview', function () {
+        return ui.button({
+          className: 'btn-codeview',
+          contents: ui.icon(options.icons.code),
+          tooltip: lang.options.codeview,
+          click: context.createInvokeHandler('codeview.toggle')
+        }).render();
+      });
+
+      context.memo('button.redo', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.redo),
+          tooltip: lang.history.redo + representShortcut('redo'),
+          click: context.createInvokeHandler('editor.redo')
+        }).render();
+      });
+
+      context.memo('button.undo', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.undo),
+          tooltip: lang.history.undo + representShortcut('undo'),
+          click: context.createInvokeHandler('editor.undo')
+        }).render();
+      });
+
+      context.memo('button.help', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.question),
+          tooltip: lang.options.help,
+          click: context.createInvokeHandler('helpDialog.show')
+        }).render();
+      });
+    };
+
+    /**
+     * image : [
+     *   ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
+     *   ['float', ['floatLeft', 'floatRight', 'floatNone' ]],
+     *   ['remove', ['removeMedia']]
+     * ],
+     */
+    this.addImagePopoverButtons = function () {
+      // Image Size Buttons
+      context.memo('button.imageSize100', function () {
+        return ui.button({
+          contents: '<span class="note-fontsize-10">100%</span>',
+          tooltip: lang.image.resizeFull,
+          click: context.createInvokeHandler('editor.resize', '1')
+        }).render();
+      });
+      context.memo('button.imageSize50', function () {
+        return  ui.button({
+          contents: '<span class="note-fontsize-10">50%</span>',
+          tooltip: lang.image.resizeHalf,
+          click: context.createInvokeHandler('editor.resize', '0.5')
+        }).render();
+      });
+      context.memo('button.imageSize25', function () {
+        return ui.button({
+          contents: '<span class="note-fontsize-10">25%</span>',
+          tooltip: lang.image.resizeQuarter,
+          click: context.createInvokeHandler('editor.resize', '0.25')
+        }).render();
+      });
+
+      // Float Buttons
+      context.memo('button.floatLeft', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.alignLeft),
+          tooltip: lang.image.floatLeft,
+          click: context.createInvokeHandler('editor.floatMe', 'left')
+        }).render();
+      });
+
+      context.memo('button.floatRight', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.alignRight),
+          tooltip: lang.image.floatRight,
+          click: context.createInvokeHandler('editor.floatMe', 'right')
+        }).render();
+      });
+
+      context.memo('button.floatNone', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.alignJustify),
+          tooltip: lang.image.floatNone,
+          click: context.createInvokeHandler('editor.floatMe', 'none')
+        }).render();
+      });
+
+      // Remove Buttons
+      context.memo('button.removeMedia', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.trash),
+          tooltip: lang.image.remove,
+          click: context.createInvokeHandler('editor.removeMedia')
+        }).render();
+      });
+    };
+
+    this.addLinkPopoverButtons = function () {
+      context.memo('button.linkDialogShow', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.link),
+          tooltip: lang.link.edit,
+          click: context.createInvokeHandler('linkDialog.show')
+        }).render();
+      });
+
+      context.memo('button.unlink', function () {
+        return ui.button({
+          contents: ui.icon(options.icons.unlink),
+          tooltip: lang.link.unlink,
+          click: context.createInvokeHandler('editor.unlink')
+        }).render();
+      });
+    };
+
+    this.build = function ($container, groups) {
+      for (var groupIdx = 0, groupLen = groups.length; groupIdx < groupLen; groupIdx++) {
+        var group = groups[groupIdx];
+        var groupName = group[0];
+        var buttons = group[1];
+
+        var $group = ui.buttonGroup({
+          className: 'note-' + groupName
+        }).render();
+
+        for (var idx = 0, len = buttons.length; idx < len; idx++) {
+          var button = context.memo('button.' + buttons[idx]);
+          if (button) {
+            $group.append(typeof button === 'function' ? button(context) : button);
+          }
+        }
+        $group.appendTo($container);
+      }
+    };
+
+    this.updateCurrentStyle = function () {
+      var styleInfo = context.invoke('editor.currentStyle');
+      this.updateBtnStates({
+        '.note-btn-bold': function () {
+          return styleInfo['font-bold'] === 'bold';
+        },
+        '.note-btn-italic': function () {
+          return styleInfo['font-italic'] === 'italic';
+        },
+        '.note-btn-underline': function () {
+          return styleInfo['font-underline'] === 'underline';
+        },
+        '.note-btn-subscript': function () {
+          return styleInfo['font-subscript'] === 'subscript';
+        },
+        '.note-btn-superscript': function () {
+          return styleInfo['font-superscript'] === 'superscript';
+        },
+        '.note-btn-strikethrough': function () {
+          return styleInfo['font-strikethrough'] === 'strikethrough';
+        }
+      });
+
+      if (styleInfo['font-family']) {
+        var fontNames = styleInfo['font-family'].split(',').map(function (name) {
+          return name.replace(/[\'\"]/g, '')
+            .replace(/\s+$/, '')
+            .replace(/^\s+/, '');
+        });
+        var fontName = list.find(fontNames, self.isFontInstalled);
+
+        $toolbar.find('.dropdown-fontname li a').each(function () {
+          // always compare string to avoid creating another func.
+          var isChecked = ($(this).data('value') + '') === (fontName + '');
+          this.className = isChecked ? 'checked' : '';
+        });
+        $toolbar.find('.note-current-fontname').text(fontName);
+      }
+
+      if (styleInfo['font-size']) {
+        var fontSize = styleInfo['font-size'];
+        $toolbar.find('.dropdown-fontsize li a').each(function () {
+          // always compare with string to avoid creating another func.
+          var isChecked = ($(this).data('value') + '') === (fontSize + '');
+          this.className = isChecked ? 'checked' : '';
+        });
+        $toolbar.find('.note-current-fontsize').text(fontSize);
+      }
+
+      if (styleInfo['line-height']) {
+        var lineHeight = styleInfo['line-height'];
+        $toolbar.find('.dropdown-line-height li a').each(function () {
+          // always compare with string to avoid creating another func.
+          var isChecked = ($(this).data('value') + '') === (lineHeight + '');
+          this.className = isChecked ? 'checked' : '';
+        });
+      }
+    };
+
+    this.updateBtnStates = function (infos) {
+      $.each(infos, function (selector, pred) {
+        ui.toggleBtnActive($toolbar.find(selector), pred());
+      });
+    };
+
+    this.tableMoveHandler = function (event) {
+      var PX_PER_EM = 18;
+      var $picker = $(event.target.parentNode); // target is mousecatcher
+      var $dimensionDisplay = $picker.next();
+      var $catcher = $picker.find('.note-dimension-picker-mousecatcher');
+      var $highlighted = $picker.find('.note-dimension-picker-highlighted');
+      var $unhighlighted = $picker.find('.note-dimension-picker-unhighlighted');
+
+      var posOffset;
+      // HTML5 with jQuery - e.offsetX is undefined in Firefox
+      if (event.offsetX === undefined) {
+        var posCatcher = $(event.target).offset();
+        posOffset = {
+          x: event.pageX - posCatcher.left,
+          y: event.pageY - posCatcher.top
+        };
+      } else {
+        posOffset = {
+          x: event.offsetX,
+          y: event.offsetY
+        };
+      }
+
+      var dim = {
+        c: Math.ceil(posOffset.x / PX_PER_EM) || 1,
+        r: Math.ceil(posOffset.y / PX_PER_EM) || 1
+      };
+
+      $highlighted.css({ width: dim.c + 'em', height: dim.r + 'em' });
+      $catcher.data('value', dim.c + 'x' + dim.r);
+
+      if (3 < dim.c && dim.c < options.insertTableMaxSize.col) {
+        $unhighlighted.css({ width: dim.c + 1 + 'em'});
+      }
+
+      if (3 < dim.r && dim.r < options.insertTableMaxSize.row) {
+        $unhighlighted.css({ height: dim.r + 1 + 'em'});
+      }
+
+      $dimensionDisplay.html(dim.c + ' x ' + dim.r);
+    };
+  };
+
+  var Toolbar = function (context) {
+    var ui = $.summernote.ui;
+
+    var $note = context.layoutInfo.note;
+    var $toolbar = context.layoutInfo.toolbar;
+    var options = context.options;
+
+    this.shouldInitialize = function () {
+      return !options.airMode;
+    };
+
+    this.initialize = function () {
+      options.toolbar = options.toolbar || [];
+
+      if (!options.toolbar.length) {
+        $toolbar.hide();
+      } else {
+        context.invoke('buttons.build', $toolbar, options.toolbar);
+      }
+
+      if (options.toolbarContainer) {
+        $toolbar.appendTo(options.toolbarContainer);
+      }
+
+      $note.on('summernote.keyup summernote.mouseup summernote.change', function () {
+        context.invoke('buttons.updateCurrentStyle');
+      });
+
+      context.invoke('buttons.updateCurrentStyle');
+    };
+
+    this.destroy = function () {
+      $toolbar.children().remove();
+    };
+
+    this.updateFullscreen = function (isFullscreen) {
+      ui.toggleBtnActive($toolbar.find('.btn-fullscreen'), isFullscreen);
+    };
+
+    this.updateCodeview = function (isCodeview) {
+      ui.toggleBtnActive($toolbar.find('.btn-codeview'), isCodeview);
+      if (isCodeview) {
+        this.deactivate();
+      } else {
+        this.activate();
+      }
+    };
+
+    this.activate = function (isIncludeCodeview) {
+      var $btn = $toolbar.find('button');
+      if (!isIncludeCodeview) {
+        $btn = $btn.not('.btn-codeview');
+      }
+      ui.toggleBtn($btn, true);
+    };
+
+    this.deactivate = function (isIncludeCodeview) {
+      var $btn = $toolbar.find('button');
+      if (!isIncludeCodeview) {
+        $btn = $btn.not('.btn-codeview');
+      }
+      ui.toggleBtn($btn, false);
+    };
+  };
+
+  var LinkDialog = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var $editor = context.layoutInfo.editor;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    this.initialize = function () {
+      var $container = options.dialogsInBody ? $(document.body) : $editor;
+
+      var body = '<div class="form-group">' +
+                   '<label>' + lang.link.textToDisplay + '</label>' +
+                   '<input class="note-link-text form-control" type="text" />' +
+                 '</div>' +
+                 '<div class="form-group">' +
+                   '<label>' + lang.link.url + '</label>' +
+                   '<input class="note-link-url form-control" type="text" value="http://" />' +
+                 '</div>' +
+                 (!options.disableLinkTarget ?
+                   '<div class="checkbox">' +
+                     '<label>' + '<input type="checkbox" checked> ' + lang.link.openInNewWindow + '</label>' +
+                   '</div>' : ''
+                 );
+      var footer = '<button href="#" class="btn btn-primary note-link-btn disabled" disabled>' + lang.link.insert + '</button>';
+
+      this.$dialog = ui.dialog({
+        className: 'link-dialog',
+        title: lang.link.insert,
+        fade: options.dialogsFade,
+        body: body,
+        footer: footer
+      }).render().appendTo($container);
+    };
+
+    this.destroy = function () {
+      ui.hideDialog(this.$dialog);
+      this.$dialog.remove();
+    };
+
+    this.bindEnterKey = function ($input, $btn) {
+      $input.on('keypress', function (event) {
+        if (event.keyCode === key.code.ENTER) {
+          $btn.trigger('click');
+        }
+      });
+    };
+
+    /**
+     * toggle update button
+     */
+    this.toggleLinkBtn = function ($linkBtn, $linkText, $linkUrl) {
+      ui.toggleBtn($linkBtn, $linkText.val() && $linkUrl.val());
+    };
+
+    /**
+     * Show link dialog and set event handlers on dialog controls.
+     *
+     * @param {Object} linkInfo
+     * @return {Promise}
+     */
+    this.showLinkDialog = function (linkInfo) {
+      return $.Deferred(function (deferred) {
+        var $linkText = self.$dialog.find('.note-link-text'),
+        $linkUrl = self.$dialog.find('.note-link-url'),
+        $linkBtn = self.$dialog.find('.note-link-btn'),
+        $openInNewWindow = self.$dialog.find('input[type=checkbox]');
+
+        ui.onDialogShown(self.$dialog, function () {
+          context.triggerEvent('dialog.shown');
+
+          // if no url was given, copy text to url
+          if (!linkInfo.url) {
+            linkInfo.url = linkInfo.text;
+          }
+
+          $linkText.val(linkInfo.text);
+
+          var handleLinkTextUpdate = function () {
+            self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
+            // if linktext was modified by keyup,
+            // stop cloning text from linkUrl
+            linkInfo.text = $linkText.val();
+          };
+
+          $linkText.on('input', handleLinkTextUpdate).on('paste', function () {
+            setTimeout(handleLinkTextUpdate, 0);
+          });
+
+          var handleLinkUrlUpdate = function () {
+            self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
+            // display same link on `Text to display` input
+            // when create a new link
+            if (!linkInfo.text) {
+              $linkText.val($linkUrl.val());
+            }
+          };
+
+          $linkUrl.on('input', handleLinkUrlUpdate).on('paste', function () {
+            setTimeout(handleLinkUrlUpdate, 0);
+          }).val(linkInfo.url).trigger('focus');
+
+          self.toggleLinkBtn($linkBtn, $linkText, $linkUrl);
+          self.bindEnterKey($linkUrl, $linkBtn);
+          self.bindEnterKey($linkText, $linkBtn);
+
+          $openInNewWindow.prop('checked', linkInfo.isNewWindow);
+
+          $linkBtn.one('click', function (event) {
+            event.preventDefault();
+
+            deferred.resolve({
+              range: linkInfo.range,
+              url: $linkUrl.val(),
+              text: $linkText.val(),
+              isNewWindow: $openInNewWindow.is(':checked')
+            });
+            self.$dialog.modal('hide');
+          });
+        });
+
+        ui.onDialogHidden(self.$dialog, function () {
+          // detach events
+          $linkText.off('input paste keypress');
+          $linkUrl.off('input paste keypress');
+          $linkBtn.off('click');
+
+          if (deferred.state() === 'pending') {
+            deferred.reject();
+          }
+        });
+
+        ui.showDialog(self.$dialog);
+      }).promise();
+    };
+
+    /**
+     * @param {Object} layoutInfo
+     */
+    this.show = function () {
+      var linkInfo = context.invoke('editor.getLinkInfo');
+
+      context.invoke('editor.saveRange');
+      this.showLinkDialog(linkInfo).then(function (linkInfo) {
+        context.invoke('editor.restoreRange');
+        context.invoke('editor.createLink', linkInfo);
+      }).fail(function () {
+        context.invoke('editor.restoreRange');
+      });
+    };
+    context.memo('help.linkDialog.show', options.langInfo.help['linkDialog.show']);
+  };
+
+  var LinkPopover = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var options = context.options;
+
+    this.events = {
+      'summernote.keyup summernote.mouseup summernote.change summernote.scroll': function () {
+        self.update();
+      },
+      'summernote.dialog.shown': function () {
+        self.hide();
+      }
+    };
+
+    this.shouldInitialize = function () {
+      return !list.isEmpty(options.popover.link);
+    };
+
+    this.initialize = function () {
+      this.$popover = ui.popover({
+        className: 'note-link-popover',
+        callback: function ($node) {
+          var $content = $node.find('.popover-content');
+          $content.prepend('<span><a target="_blank"></a>&nbsp;</span>');
+        }
+      }).render().appendTo('body');
+      var $content = this.$popover.find('.popover-content');
+
+      context.invoke('buttons.build', $content, options.popover.link);
+    };
+
+    this.destroy = function () {
+      this.$popover.remove();
+    };
+
+    this.update = function () {
+      // Prevent focusing on editable when invoke('code') is executed
+      if (!context.invoke('editor.hasFocus')) {
+        this.hide();
+        return;
+      }
+
+      var rng = context.invoke('editor.createRange');
+      if (rng.isCollapsed() && rng.isOnAnchor()) {
+        var anchor = dom.ancestor(rng.sc, dom.isAnchor);
+        var href = $(anchor).attr('href');
+        this.$popover.find('a').attr('href', href).html(href);
+
+        var pos = dom.posFromPlaceholder(anchor);
+        this.$popover.css({
+          display: 'block',
+          left: pos.left,
+          top: pos.top
+        });
+      } else {
+        this.hide();
+      }
+    };
+
+    this.hide = function () {
+      this.$popover.hide();
+    };
+  };
+
+  var ImageDialog = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var $editor = context.layoutInfo.editor;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    this.initialize = function () {
+      var $container = options.dialogsInBody ? $(document.body) : $editor;
+
+      var imageLimitation = '';
+      if (options.maximumImageFileSize) {
+        var unit = Math.floor(Math.log(options.maximumImageFileSize) / Math.log(1024));
+        var readableSize = (options.maximumImageFileSize / Math.pow(1024, unit)).toFixed(2) * 1 +
+                           ' ' + ' KMGTP'[unit] + 'B';
+        imageLimitation = '<small>' + lang.image.maximumFileSize + ' : ' + readableSize + '</small>';
+      }
+
+      var body = '<div class="form-group note-group-select-from-files">' +
+                   '<label>' + lang.image.selectFromFiles + '</label>' +
+                   '<input class="note-image-input form-control" type="file" name="files" accept="image/*" multiple="multiple" />' +
+                   imageLimitation +
+                 '</div>' +
+                 '<div class="form-group note-group-image-url" style="overflow:auto;">' +
+                   '<label>' + lang.image.url + '</label>' +
+                   '<input class="note-image-url form-control col-md-12" type="text" />' +
+                 '</div>';
+      var footer = '<button href="#" class="btn btn-primary note-image-btn disabled" disabled>' + lang.image.insert + '</button>';
+
+      this.$dialog = ui.dialog({
+        title: lang.image.insert,
+        fade: options.dialogsFade,
+        body: body,
+        footer: footer
+      }).render().appendTo($container);
+    };
+
+    this.destroy = function () {
+      ui.hideDialog(this.$dialog);
+      this.$dialog.remove();
+    };
+
+    this.bindEnterKey = function ($input, $btn) {
+      $input.on('keypress', function (event) {
+        if (event.keyCode === key.code.ENTER) {
+          $btn.trigger('click');
+        }
+      });
+    };
+
+    this.show = function () {
+      context.invoke('editor.saveRange');
+      this.showImageDialog().then(function (data) {
+        // [workaround] hide dialog before restore range for IE range focus
+        ui.hideDialog(self.$dialog);
+        context.invoke('editor.restoreRange');
+
+        if (typeof data === 'string') { // image url
+          context.invoke('editor.insertImage', data);
+        } else { // array of files
+          context.invoke('editor.insertImagesOrCallback', data);
+        }
+      }).fail(function () {
+        context.invoke('editor.restoreRange');
+      });
+    };
+
+    /**
+     * show image dialog
+     *
+     * @param {jQuery} $dialog
+     * @return {Promise}
+     */
+    this.showImageDialog = function () {
+      return $.Deferred(function (deferred) {
+        var $imageInput = self.$dialog.find('.note-image-input'),
+            $imageUrl = self.$dialog.find('.note-image-url'),
+            $imageBtn = self.$dialog.find('.note-image-btn');
+
+        ui.onDialogShown(self.$dialog, function () {
+          context.triggerEvent('dialog.shown');
+
+          // Cloning imageInput to clear element.
+          $imageInput.replaceWith($imageInput.clone()
+            .on('change', function () {
+              deferred.resolve(this.files || this.value);
+            })
+            .val('')
+          );
+
+          $imageBtn.click(function (event) {
+            event.preventDefault();
+
+            deferred.resolve($imageUrl.val());
+          });
+
+          $imageUrl.on('keyup paste', function () {
+            var url = $imageUrl.val();
+            ui.toggleBtn($imageBtn, url);
+          }).val('').trigger('focus');
+          self.bindEnterKey($imageUrl, $imageBtn);
+        });
+
+        ui.onDialogHidden(self.$dialog, function () {
+          $imageInput.off('change');
+          $imageUrl.off('keyup paste keypress');
+          $imageBtn.off('click');
+
+          if (deferred.state() === 'pending') {
+            deferred.reject();
+          }
+        });
+
+        ui.showDialog(self.$dialog);
+      });
+    };
+  };
+
+  var ImagePopover = function (context) {
+    var ui = $.summernote.ui;
+
+    var options = context.options;
+
+    this.shouldInitialize = function () {
+      return !list.isEmpty(options.popover.image);
+    };
+
+    this.initialize = function () {
+      this.$popover = ui.popover({
+        className: 'note-image-popover'
+      }).render().appendTo('body');
+      var $content = this.$popover.find('.popover-content');
+
+      context.invoke('buttons.build', $content, options.popover.image);
+    };
+
+    this.destroy = function () {
+      this.$popover.remove();
+    };
+
+    this.update = function (target) {
+      if (dom.isImg(target)) {
+        var pos = dom.posFromPlaceholder(target);
+        this.$popover.css({
+          display: 'block',
+          left: pos.left,
+          top: pos.top
+        });
+      } else {
+        this.hide();
+      }
+    };
+
+    this.hide = function () {
+      this.$popover.hide();
+    };
+  };
+
+  var VideoDialog = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var $editor = context.layoutInfo.editor;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    this.initialize = function () {
+      var $container = options.dialogsInBody ? $(document.body) : $editor;
+
+      var body = '<div class="form-group row-fluid">' +
+          '<label>' + lang.video.url + ' <small class="text-muted">' + lang.video.providers + '</small></label>' +
+          '<input class="note-video-url form-control span12" type="text" />' +
+          '</div>';
+      var footer = '<button href="#" class="btn btn-primary note-video-btn disabled" disabled>' + lang.video.insert + '</button>';
+
+      this.$dialog = ui.dialog({
+        title: lang.video.insert,
+        fade: options.dialogsFade,
+        body: body,
+        footer: footer
+      }).render().appendTo($container);
+    };
+
+    this.destroy = function () {
+      ui.hideDialog(this.$dialog);
+      this.$dialog.remove();
+    };
+
+    this.bindEnterKey = function ($input, $btn) {
+      $input.on('keypress', function (event) {
+        if (event.keyCode === key.code.ENTER) {
+          $btn.trigger('click');
+        }
+      });
+    };
+
+    this.createVideoNode = function (url) {
+      // video url patterns(youtube, instagram, vimeo, dailymotion, youku, mp4, ogg, webm)
+      var ytRegExp = /^(?:https?:\/\/)?(?:www\.)?(?:youtu\.be\/|youtube\.com\/(?:embed\/|v\/|watch\?v=|watch\?.+&v=))((\w|-){11})(?:\S+)?$/;
+      var ytMatch = url.match(ytRegExp);
+
+      var igRegExp = /(?:www\.|\/\/)instagram\.com\/p\/(.[a-zA-Z0-9_-]*)/;
+      var igMatch = url.match(igRegExp);
+
+      var vRegExp = /\/\/vine\.co\/v\/([a-zA-Z0-9]+)/;
+      var vMatch = url.match(vRegExp);
+
+      var vimRegExp = /\/\/(player\.)?vimeo\.com\/([a-z]*\/)*([0-9]{6,11})[?]?.*/;
+      var vimMatch = url.match(vimRegExp);
+
+      var dmRegExp = /.+dailymotion.com\/(video|hub)\/([^_]+)[^#]*(#video=([^_&]+))?/;
+      var dmMatch = url.match(dmRegExp);
+
+      var youkuRegExp = /\/\/v\.youku\.com\/v_show\/id_(\w+)=*\.html/;
+      var youkuMatch = url.match(youkuRegExp);
+
+      var mp4RegExp = /^.+.(mp4|m4v)$/;
+      var mp4Match = url.match(mp4RegExp);
+
+      var oggRegExp = /^.+.(ogg|ogv)$/;
+      var oggMatch = url.match(oggRegExp);
+
+      var webmRegExp = /^.+.(webm)$/;
+      var webmMatch = url.match(webmRegExp);
+
+      var $video;
+      if (ytMatch && ytMatch[1].length === 11) {
+        var youtubeId = ytMatch[1];
+        $video = $('<iframe>')
+            .attr('frameborder', 0)
+            .attr('src', '//www.youtube.com/embed/' + youtubeId)
+            .attr('width', '640').attr('height', '360');
+      } else if (igMatch && igMatch[0].length) {
+        $video = $('<iframe>')
+            .attr('frameborder', 0)
+            .attr('src', 'https://instagram.com/p/' + igMatch[1] + '/embed/')
+            .attr('width', '612').attr('height', '710')
+            .attr('scrolling', 'no')
+            .attr('allowtransparency', 'true');
+      } else if (vMatch && vMatch[0].length) {
+        $video = $('<iframe>')
+            .attr('frameborder', 0)
+            .attr('src', vMatch[0] + '/embed/simple')
+            .attr('width', '600').attr('height', '600')
+            .attr('class', 'vine-embed');
+      } else if (vimMatch && vimMatch[3].length) {
+        $video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
+            .attr('frameborder', 0)
+            .attr('src', '//player.vimeo.com/video/' + vimMatch[3])
+            .attr('width', '640').attr('height', '360');
+      } else if (dmMatch && dmMatch[2].length) {
+        $video = $('<iframe>')
+            .attr('frameborder', 0)
+            .attr('src', '//www.dailymotion.com/embed/video/' + dmMatch[2])
+            .attr('width', '640').attr('height', '360');
+      } else if (youkuMatch && youkuMatch[1].length) {
+        $video = $('<iframe webkitallowfullscreen mozallowfullscreen allowfullscreen>')
+            .attr('frameborder', 0)
+            .attr('height', '498')
+            .attr('width', '510')
+            .attr('src', '//player.youku.com/embed/' + youkuMatch[1]);
+      } else if (mp4Match || oggMatch || webmMatch) {
+        $video = $('<video controls>')
+            .attr('src', url)
+            .attr('width', '640').attr('height', '360');
+      } else {
+        // this is not a known video link. Now what, Cat? Now what?
+        return false;
+      }
+
+      $video.addClass('note-video-clip');
+
+      return $video[0];
+    };
+
+    this.show = function () {
+      var text = context.invoke('editor.getSelectedText');
+      context.invoke('editor.saveRange');
+      this.showVideoDialog(text).then(function (url) {
+        // [workaround] hide dialog before restore range for IE range focus
+        ui.hideDialog(self.$dialog);
+        context.invoke('editor.restoreRange');
+
+        // build node
+        var $node = self.createVideoNode(url);
+
+        if ($node) {
+          // insert video node
+          context.invoke('editor.insertNode', $node);
+        }
+      }).fail(function () {
+        context.invoke('editor.restoreRange');
+      });
+    };
+
+    /**
+     * show image dialog
+     *
+     * @param {jQuery} $dialog
+     * @return {Promise}
+     */
+    this.showVideoDialog = function (text) {
+      return $.Deferred(function (deferred) {
+        var $videoUrl = self.$dialog.find('.note-video-url'),
+            $videoBtn = self.$dialog.find('.note-video-btn');
+
+        ui.onDialogShown(self.$dialog, function () {
+          context.triggerEvent('dialog.shown');
+
+          $videoUrl.val(text).on('input', function () {
+            ui.toggleBtn($videoBtn, $videoUrl.val());
+          }).trigger('focus');
+
+          $videoBtn.click(function (event) {
+            event.preventDefault();
+
+            deferred.resolve($videoUrl.val());
+          });
+
+          self.bindEnterKey($videoUrl, $videoBtn);
+        });
+
+        ui.onDialogHidden(self.$dialog, function () {
+          $videoUrl.off('input');
+          $videoBtn.off('click');
+
+          if (deferred.state() === 'pending') {
+            deferred.reject();
+          }
+        });
+
+        ui.showDialog(self.$dialog);
+      });
+    };
+  };
+
+  var HelpDialog = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var $editor = context.layoutInfo.editor;
+    var options = context.options;
+    var lang = options.langInfo;
+
+    this.createShortCutList = function () {
+      var keyMap = options.keyMap[agent.isMac ? 'mac' : 'pc'];
+      return Object.keys(keyMap).map(function (key) {
+        var command = keyMap[key];
+        var $row = $('<div><div class="help-list-item"/></div>');
+        $row.append($('<label><kbd>' + key + '</kdb></label>').css({
+          'width': 180,
+          'margin-right': 10
+        })).append($('<span/>').html(context.memo('help.' + command) || command));
+        return $row.html();
+      }).join('');
+    };
+
+    this.initialize = function () {
+      var $container = options.dialogsInBody ? $(document.body) : $editor;
+
+      var body = [
+        '<p class="text-center">',
+        '<a href="http://summernote.org/" target="_blank">Summernote 0.8.2</a> · ',
+        '<a href="https://github.com/summernote/summernote" target="_blank">Project</a> · ',
+        '<a href="https://github.com/summernote/summernote/issues" target="_blank">Issues</a>',
+        '</p>'
+      ].join('');
+
+      this.$dialog = ui.dialog({
+        title: lang.options.help,
+        fade: options.dialogsFade,
+        body: this.createShortCutList(),
+        footer: body,
+        callback: function ($node) {
+          $node.find('.modal-body').css({
+            'max-height': 300,
+            'overflow': 'scroll'
+          });
+        }
+      }).render().appendTo($container);
+    };
+
+    this.destroy = function () {
+      ui.hideDialog(this.$dialog);
+      this.$dialog.remove();
+    };
+
+    /**
+     * show help dialog
+     *
+     * @return {Promise}
+     */
+    this.showHelpDialog = function () {
+      return $.Deferred(function (deferred) {
+        ui.onDialogShown(self.$dialog, function () {
+          context.triggerEvent('dialog.shown');
+          deferred.resolve();
+        });
+        ui.showDialog(self.$dialog);
+      }).promise();
+    };
+
+    this.show = function () {
+      context.invoke('editor.saveRange');
+      this.showHelpDialog().then(function () {
+        context.invoke('editor.restoreRange');
+      });
+    };
+  };
+
+  var AirPopover = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var options = context.options;
+
+    var AIR_MODE_POPOVER_X_OFFSET = 20;
+
+    this.events = {
+      'summernote.keyup summernote.mouseup summernote.scroll': function () {
+        self.update();
+      },
+      'summernote.change summernote.dialog.shown': function () {
+        self.hide();
+      },
+      'summernote.focusout': function (we, e) {
+        // [workaround] Firefox doesn't support relatedTarget on focusout
+        //  - Ignore hide action on focus out in FF.
+        if (agent.isFF) {
+          return;
+        }
+
+        if (!e.relatedTarget || !dom.ancestor(e.relatedTarget, func.eq(self.$popover[0]))) {
+          self.hide();
+        }
+      }
+    };
+
+    this.shouldInitialize = function () {
+      return options.airMode && !list.isEmpty(options.popover.air);
+    };
+
+    this.initialize = function () {
+      this.$popover = ui.popover({
+        className: 'note-air-popover'
+      }).render().appendTo('body');
+      var $content = this.$popover.find('.popover-content');
+
+      context.invoke('buttons.build', $content, options.popover.air);
+    };
+
+    this.destroy = function () {
+      this.$popover.remove();
+    };
+
+    this.update = function () {
+      var styleInfo = context.invoke('editor.currentStyle');
+      if (styleInfo.range && !styleInfo.range.isCollapsed()) {
+        var rect = list.last(styleInfo.range.getClientRects());
+        if (rect) {
+          var bnd = func.rect2bnd(rect);
+          this.$popover.css({
+            display: 'block',
+            left: Math.max(bnd.left + bnd.width / 2, 0) - AIR_MODE_POPOVER_X_OFFSET,
+            top: bnd.top + bnd.height
+          });
+        }
+      } else {
+        this.hide();
+      }
+    };
+
+    this.hide = function () {
+      this.$popover.hide();
+    };
+  };
+
+  var HintPopover = function (context) {
+    var self = this;
+    var ui = $.summernote.ui;
+
+    var POPOVER_DIST = 5;
+    var hint = context.options.hint || [];
+    var direction = context.options.hintDirection || 'bottom';
+    var hints = $.isArray(hint) ? hint : [hint];
+
+    this.events = {
+      'summernote.keyup': function (we, e) {
+        if (!e.isDefaultPrevented()) {
+          self.handleKeyup(e);
+        }
+      },
+      'summernote.keydown': function (we, e) {
+        self.handleKeydown(e);
+      },
+      'summernote.dialog.shown': function () {
+        self.hide();
+      }
+    };
+
+    this.shouldInitialize = function () {
+      return hints.length > 0;
+    };
+
+    this.initialize = function () {
+      this.lastWordRange = null;
+      this.$popover = ui.popover({
+        className: 'note-hint-popover',
+        hideArrow: true,
+        direction: ''
+      }).render().appendTo('body');
+
+      this.$popover.hide();
+
+      this.$content = this.$popover.find('.popover-content');
+
+      this.$content.on('click', '.note-hint-item', function () {
+        self.$content.find('.active').removeClass('active');
+        $(this).addClass('active');
+        self.replace();
+      });
+    };
+
+    this.destroy = function () {
+      this.$popover.remove();
+    };
+
+    this.selectItem = function ($item) {
+      this.$content.find('.active').removeClass('active');
+      $item.addClass('active');
+
+      this.$content[0].scrollTop = $item[0].offsetTop - (this.$content.innerHeight() / 2);
+    };
+
+    this.moveDown = function () {
+      var $current = this.$content.find('.note-hint-item.active');
+      var $next = $current.next();
+
+      if ($next.length) {
+        this.selectItem($next);
+      } else {
+        var $nextGroup = $current.parent().next();
+
+        if (!$nextGroup.length) {
+          $nextGroup = this.$content.find('.note-hint-group').first();
+        }
+
+        this.selectItem($nextGroup.find('.note-hint-item').first());
+      }
+    };
+
+    this.moveUp = function () {
+      var $current = this.$content.find('.note-hint-item.active');
+      var $prev = $current.prev();
+
+      if ($prev.length) {
+        this.selectItem($prev);
+      } else {
+        var $prevGroup = $current.parent().prev();
+
+        if (!$prevGroup.length) {
+          $prevGroup = this.$content.find('.note-hint-group').last();
+        }
+
+        this.selectItem($prevGroup.find('.note-hint-item').last());
+      }
+    };
+
+    this.replace = function () {
+      var $item = this.$content.find('.note-hint-item.active');
+
+      if ($item.length) {
+        var node = this.nodeFromItem($item);
+        this.lastWordRange.insertNode(node);
+        range.createFromNode(node).collapse().select();
+
+        this.lastWordRange = null;
+        this.hide();
+        context.invoke('editor.focus');
+      }
+
+    };
+
+    this.nodeFromItem = function ($item) {
+      var hint = hints[$item.data('index')];
+      var item = $item.data('item');
+      var node = hint.content ? hint.content(item) : item;
+      if (typeof node === 'string') {
+        node = dom.createText(node);
+      }
+      return node;
+    };
+
+    this.createItemTemplates = function (hintIdx, items) {
+      var hint = hints[hintIdx];
+      return items.map(function (item, idx) {
+        var $item = $('<div class="note-hint-item"/>');
+        $item.append(hint.template ? hint.template(item) : item + '');
+        $item.data({
+          'index': hintIdx,
+          'item': item
+        });
+
+        if (hintIdx === 0 && idx === 0) {
+          $item.addClass('active');
+        }
+        return $item;
+      });
+    };
+
+    this.handleKeydown = function (e) {
+      if (!this.$popover.is(':visible')) {
+        return;
+      }
+
+      if (e.keyCode === key.code.ENTER) {
+        e.preventDefault();
+        this.replace();
+      } else if (e.keyCode === key.code.UP) {
+        e.preventDefault();
+        this.moveUp();
+      } else if (e.keyCode === key.code.DOWN) {
+        e.preventDefault();
+        this.moveDown();
+      }
+    };
+
+    this.searchKeyword = function (index, keyword, callback) {
+      var hint = hints[index];
+      if (hint && hint.match.test(keyword) && hint.search) {
+        var matches = hint.match.exec(keyword);
+        hint.search(matches[1], callback);
+      } else {
+        callback();
+      }
+    };
+
+    this.createGroup = function (idx, keyword) {
+      var $group = $('<div class="note-hint-group note-hint-group-' + idx + '"/>');
+      this.searchKeyword(idx, keyword, function (items) {
+        items = items || [];
+        if (items.length) {
+          $group.html(self.createItemTemplates(idx, items));
+          self.show();
+        }
+      });
+
+      return $group;
+    };
+
+    this.handleKeyup = function (e) {
+      if (list.contains([key.code.ENTER, key.code.UP, key.code.DOWN], e.keyCode)) {
+        if (e.keyCode === key.code.ENTER) {
+          if (this.$popover.is(':visible')) {
+            return;
+          }
+        }
+      } else {
+        var wordRange = context.invoke('editor.createRange').getWordRange();
+        var keyword = wordRange.toString();
+        if (hints.length && keyword) {
+          this.$content.empty();
+
+          var bnd = func.rect2bnd(list.last(wordRange.getClientRects()));
+          if (bnd) {
+
+            this.$popover.hide();
+
+            this.lastWordRange = wordRange;
+
+            hints.forEach(function (hint, idx) {
+              if (hint.match.test(keyword)) {
+                self.createGroup(idx, keyword).appendTo(self.$content);
+              }
+            });
+
+            // set position for popover after group is created
+            if (direction === 'top') {
+              this.$popover.css({
+                left: bnd.left,
+                top: bnd.top - this.$popover.outerHeight() - POPOVER_DIST
+              });
+            } else {
+              this.$popover.css({
+                left: bnd.left,
+                top: bnd.top + bnd.height + POPOVER_DIST
+              });
+            }
+
+          }
+        } else {
+          this.hide();
+        }
+      }
+    };
+
+    this.show = function () {
+      this.$popover.show();
+    };
+
+    this.hide = function () {
+      this.$popover.hide();
+    };
+  };
+
+
+  $.summernote = $.extend($.summernote, {
+    version: '0.8.2',
+    ui: ui,
+    dom: dom,
+
+    plugins: {},
+
+    options: {
+      modules: {
+        'editor': Editor,
+        'clipboard': Clipboard,
+        'dropzone': Dropzone,
+        'codeview': Codeview,
+        'statusbar': Statusbar,
+        'fullscreen': Fullscreen,
+        'handle': Handle,
+        // FIXME: HintPopover must be front of autolink
+        //  - Script error about range when Enter key is pressed on hint popover
+        'hintPopover': HintPopover,
+        'autoLink': AutoLink,
+        'autoSync': AutoSync,
+        'placeholder': Placeholder,
+        'buttons': Buttons,
+        'toolbar': Toolbar,
+        'linkDialog': LinkDialog,
+        'linkPopover': LinkPopover,
+        'imageDialog': ImageDialog,
+        'imagePopover': ImagePopover,
+        'videoDialog': VideoDialog,
+        'helpDialog': HelpDialog,
+        'airPopover': AirPopover
+      },
+
+      buttons: {},
+      
+      lang: 'en-US',
+
+      // toolbar
+      toolbar: [
+        ['style', ['style']],
+        ['font', ['bold', 'underline', 'clear']],
+        ['fontname', ['fontname']],
+        ['color', ['color']],
+        ['para', ['ul', 'ol', 'paragraph']],
+        ['table', ['table']],
+        ['insert', ['link', 'picture', 'video']],
+        ['view', ['fullscreen', 'codeview', 'help']]
+      ],
+
+      // popover
+      popover: {
+        image: [
+          ['imagesize', ['imageSize100', 'imageSize50', 'imageSize25']],
+          ['float', ['floatLeft', 'floatRight', 'floatNone']],
+          ['remove', ['removeMedia']]
+        ],
+        link: [
+          ['link', ['linkDialogShow', 'unlink']]
+        ],
+        air: [
+          ['color', ['color']],
+          ['font', ['bold', 'underline', 'clear']],
+          ['para', ['ul', 'paragraph']],
+          ['table', ['table']],
+          ['insert', ['link', 'picture']]
+        ]
+      },
+
+      // air mode: inline editor
+      airMode: false,
+
+      width: null,
+      height: null,
+
+      focus: false,
+      tabSize: 4,
+      styleWithSpan: true,
+      shortcuts: true,
+      textareaAutoSync: true,
+      direction: null,
+
+      styleTags: ['p', 'blockquote', 'pre', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'],
+
+      fontNames: [
+        'Arial', 'Arial Black', 'Comic Sans MS', 'Courier New',
+        'Helvetica Neue', 'Helvetica', 'Impact', 'Lucida Grande',
+        'Tahoma', 'Times New Roman', 'Verdana'
+      ],
+
+      fontSizes: ['8', '9', '10', '11', '12', '14', '18', '24', '36'],
+
+      // pallete colors(n x n)
+      colors: [
+        ['#000000', '#424242', '#636363', '#9C9C94', '#CEC6CE', '#EFEFEF', '#F7F7F7', '#FFFFFF'],
+        ['#FF0000', '#FF9C00', '#FFFF00', '#00FF00', '#00FFFF', '#0000FF', '#9C00FF', '#FF00FF'],
+        ['#F7C6CE', '#FFE7CE', '#FFEFC6', '#D6EFD6', '#CEDEE7', '#CEE7F7', '#D6D6E7', '#E7D6DE'],
+        ['#E79C9C', '#FFC69C', '#FFE79C', '#B5D6A5', '#A5C6CE', '#9CC6EF', '#B5A5D6', '#D6A5BD'],
+        ['#E76363', '#F7AD6B', '#FFD663', '#94BD7B', '#73A5AD', '#6BADDE', '#8C7BC6', '#C67BA5'],
+        ['#CE0000', '#E79439', '#EFC631', '#6BA54A', '#4A7B8C', '#3984C6', '#634AA5', '#A54A7B'],
+        ['#9C0000', '#B56308', '#BD9400', '#397B21', '#104A5A', '#085294', '#311873', '#731842'],
+        ['#630000', '#7B3900', '#846300', '#295218', '#083139', '#003163', '#21104A', '#4A1031']
+      ],
+
+      lineHeights: ['1.0', '1.2', '1.4', '1.5', '1.6', '1.8', '2.0', '3.0'],
+
+      tableClassName: 'table table-bordered',
+
+      insertTableMaxSize: {
+        col: 10,
+        row: 10
+      },
+
+      dialogsInBody: false,
+      dialogsFade: false,
+
+      maximumImageFileSize: null,
+
+      callbacks: {
+        onInit: null,
+        onFocus: null,
+        onBlur: null,
+        onEnter: null,
+        onKeyup: null,
+        onKeydown: null,
+        onImageUpload: null,
+        onImageUploadError: null
+      },
+
+      codemirror: {
+        mode: 'text/html',
+        htmlMode: true,
+        lineNumbers: true
+      },
+
+      keyMap: {
+        pc: {
+          'ENTER': 'insertParagraph',
+          'CTRL+Z': 'undo',
+          'CTRL+Y': 'redo',
+          'TAB': 'tab',
+          'SHIFT+TAB': 'untab',
+          'CTRL+B': 'bold',
+          'CTRL+I': 'italic',
+          'CTRL+U': 'underline',
+          'CTRL+SHIFT+S': 'strikethrough',
+          'CTRL+BACKSLASH': 'removeFormat',
+          'CTRL+SHIFT+L': 'justifyLeft',
+          'CTRL+SHIFT+E': 'justifyCenter',
+          'CTRL+SHIFT+R': 'justifyRight',
+          'CTRL+SHIFT+J': 'justifyFull',
+          'CTRL+SHIFT+NUM7': 'insertUnorderedList',
+          'CTRL+SHIFT+NUM8': 'insertOrderedList',
+          'CTRL+LEFTBRACKET': 'outdent',
+          'CTRL+RIGHTBRACKET': 'indent',
+          'CTRL+NUM0': 'formatPara',
+          'CTRL+NUM1': 'formatH1',
+          'CTRL+NUM2': 'formatH2',
+          'CTRL+NUM3': 'formatH3',
+          'CTRL+NUM4': 'formatH4',
+          'CTRL+NUM5': 'formatH5',
+          'CTRL+NUM6': 'formatH6',
+          'CTRL+ENTER': 'insertHorizontalRule',
+          'CTRL+K': 'linkDialog.show'
+        },
+
+        mac: {
+          'ENTER': 'insertParagraph',
+          'CMD+Z': 'undo',
+          'CMD+SHIFT+Z': 'redo',
+          'TAB': 'tab',
+          'SHIFT+TAB': 'untab',
+          'CMD+B': 'bold',
+          'CMD+I': 'italic',
+          'CMD+U': 'underline',
+          'CMD+SHIFT+S': 'strikethrough',
+          'CMD+BACKSLASH': 'removeFormat',
+          'CMD+SHIFT+L': 'justifyLeft',
+          'CMD+SHIFT+E': 'justifyCenter',
+          'CMD+SHIFT+R': 'justifyRight',
+          'CMD+SHIFT+J': 'justifyFull',
+          'CMD+SHIFT+NUM7': 'insertUnorderedList',
+          'CMD+SHIFT+NUM8': 'insertOrderedList',
+          'CMD+LEFTBRACKET': 'outdent',
+          'CMD+RIGHTBRACKET': 'indent',
+          'CMD+NUM0': 'formatPara',
+          'CMD+NUM1': 'formatH1',
+          'CMD+NUM2': 'formatH2',
+          'CMD+NUM3': 'formatH3',
+          'CMD+NUM4': 'formatH4',
+          'CMD+NUM5': 'formatH5',
+          'CMD+NUM6': 'formatH6',
+          'CMD+ENTER': 'insertHorizontalRule',
+          'CMD+K': 'linkDialog.show'
+        }
+      },
+      icons: {
+        'align': 'note-icon-align',
+        'alignCenter': 'note-icon-align-center',
+        'alignJustify': 'note-icon-align-justify',
+        'alignLeft': 'note-icon-align-left',
+        'alignRight': 'note-icon-align-right',
+        'indent': 'note-icon-align-indent',
+        'outdent': 'note-icon-align-outdent',
+        'arrowsAlt': 'note-icon-arrows-alt',
+        'bold': 'note-icon-bold',
+        'caret': 'note-icon-caret',
+        'circle': 'note-icon-circle',
+        'close': 'note-icon-close',
+        'code': 'note-icon-code',
+        'eraser': 'note-icon-eraser',
+        'font': 'note-icon-font',
+        'frame': 'note-icon-frame',
+        'italic': 'note-icon-italic',
+        'link': 'note-icon-link',
+        'unlink': 'note-icon-chain-broken',
+        'magic': 'note-icon-magic',
+        'menuCheck': 'note-icon-check',
+        'minus': 'note-icon-minus',
+        'orderedlist': 'note-icon-orderedlist',
+        'pencil': 'note-icon-pencil',
+        'picture': 'note-icon-picture',
+        'question': 'note-icon-question',
+        'redo': 'note-icon-redo',
+        'square': 'note-icon-square',
+        'strikethrough': 'note-icon-strikethrough',
+        'subscript': 'note-icon-subscript',
+        'superscript': 'note-icon-superscript',
+        'table': 'note-icon-table',
+        'textHeight': 'note-icon-text-height',
+        'trash': 'note-icon-trash',
+        'underline': 'note-icon-underline',
+        'undo': 'note-icon-undo',
+        'unorderedlist': 'note-icon-unorderedlist',
+        'video': 'note-icon-video'
+      }
+    }
+  });
+
+}));
diff --git a/frappe/public/less/desk.less b/frappe/public/less/desk.less
index 4ab4a02d1e..478ffcf7fc 100644
--- a/frappe/public/less/desk.less
+++ b/frappe/public/less/desk.less
@@ -504,4 +504,29 @@ textarea.form-control {
 
 .search-result {
 	margin-bottom: 24px;
+}
+
+// summernote editor
+.note-editor {
+	margin-top: 5px;
+
+	&.note-frame {
+		border-color: @border-color;
+	}
+
+	.btn {
+		outline: none !important;
+	}
+
+	.dropdown-style > li > a > * {
+		margin: 0;
+	}
+	.fa.fa-check {
+		color: @text-color !important;
+	}
+	.dropdown-menu {
+		z-index: 100;
+		max-height: 300px;
+		overflow: scroll;
+	}
 }
\ No newline at end of file