Knockout mail editor

by Leonardo Trimarchi

HTML

<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.no-icons.min.css">
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-responsive.min.css">
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/font-awesome/3.0.2/css/font-awesome.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/1362566/jquery.hotkeys.js"></script>
<script src="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/1362566/bootstrap-wysiwyg.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script>
<div class="container">
  <div class="hero-unit">

	
    <textarea data-bind="value: name, valueUpdate: 'afterkeydown'"> </textarea>
<h4>Output when using normal text area</h4>
<p data-bind="html: name"></p>
<hr/>
	<!---
	Please read this before copying the toolbar:

	* One of the best things about this widget is that it does not impose any styling on you, and that it allows you 
	* to create a custom toolbar with the options and functions that are good for your particular use. This toolbar
	* is just an example - don't just copy it and force yourself to use the demo styling. Create your own. Read 
	* this page to understand how to customise it:
    * https://github.com/mindmup/bootstrap-wysiwyg/blob/master/README.md#customising-
	--->
	<div id="alerts"></div>
    <div class="btn-toolbar" data-role="editor-toolbar" data-target="#editor">
      <div class="btn-group">
        <a class="btn dropdown-toggle" data-toggle="dropdown" title="Font"><i class="icon-font"></i><b class="caret"></b></a>
          <ul class="dropdown-menu">
          </ul>
        </div>
      <div class="btn-group">
        <a class="btn dropdown-toggle" data-toggle="dropdown" title="Font Size"><i...

CSS

#editor {
	max-height: 250px;
	height: 250px;
	background-color: white;
	border-collapse: separate; 
	border: 1px solid rgb(204, 204, 204); 
	padding: 4px; 
	box-sizing: content-box; 
	-webkit-box-shadow: rgba(0, 0, 0, 0.0745098) 0px 1px 1px 0px inset; 
	box-shadow: rgba(0, 0, 0, 0.0745098) 0px 1px 1px 0px inset;
	border-top-right-radius: 3px; border-bottom-right-radius: 3px;
	border-bottom-left-radius: 3px; border-top-left-radius: 3px;
	overflow: scroll;
	outline: none;
}
#voiceBtn {
  width: 20px;
  color: transparent;
  background-color: transparent;
  transform: scale(2.0, 2.0);
  -webkit-transform: scale(2.0, 2.0);
  -moz-transform: scale(2.0, 2.0);
  border: transparent;
  cursor: pointer;
  box-shadow: none;
  -webkit-box-shadow: none;
}

div[data-role="editor-toolbar"] {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.dropdown-menu a {
  cursor: pointer;
}

JavaScript

ko.bindingHandlers.htmlValue = {
    init: function(element, valueAccessor, allBindingsAccessor) {
        var updateHandler = function() {
            var modelValue = valueAccessor(),
                elementValue = element.innerHTML;
            //update the value on keyup
            modelValue(elementValue);
        };
        
        ko.utils.registerEventHandler(element, "keyup", updateHandler);
        ko.utils.registerEventHandler(element, "input", updateHandler);
    },
    update: function(element, valueAccessor) {
        var value = ko.utils.unwrapObservable(valueAccessor()) || "",
            current = element.innerHTML;
        
        if (value !== current) {
            element.innerHTML = value;    
        }
    }
};

	  		var viewModel = {
		name: ko.observable("Normal Text area that updates the observables after keydown"), 
		changeName: function(){
		  this.name("Expert");
			},
			nameVisible: ko.observable(true)
		};
	   ko.applyBindings(viewModel);
	  
	  
    function initToolbarBootstrapBindings() {
      var fonts = ['Serif', 'Sans', 'Arial', 'Arial Black', 'Courier', 
            'Courier New', 'Comic Sans MS', 'Helvetica', 'Impact', 'Lucida Grande', 'Lucida Sans', 'Tahoma', 'Times',
            'Times New Roman', 'Verdana'],
            fontTarget = $('[title=Font]').siblings('.dropdown-menu');
      $.each(fonts, function (idx, fontName) {
          fontTarget.append($('<li><a data-edit="fontName ' + fontName +'" style="font-family:\''+ fontName +'\'">'+fontName + '</a></li>'));
      });
      $('a[title]').tooltip({container:'body'});
    	$('.dropdown-menu input').click(function() {return false;})
		    .change(function () {$(this).parent('.dropdown-menu').siblings('.dropdown-toggle').dropdown('toggle');})
        .keydown('esc', function () {this.value='';$(this).change();});

      $('[data-role=magic-overlay]').each(function () { 
        var overlay = $(this), target = $(overlay.data('target')); 
       ...