libjs-edit-area 0.8.2-1 / usr / share / doc / libjs-edit-area / customization_plugin.html

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" >
<head>
	<title>EditArea documentation</title>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<link href="doc_style.css" rel="stylesheet" type="text/css" />
</head>
<body>
	<div class='header'>
		<h1>Customization - Creating a plugin</h1>
	</div>
	<div class='content'>
	<h2>Creating your own plugins</h2>
		<p>
			Creating you own plugins for EditArea is fairly easy if you know the basics of HTML, CSS and Javascript. 
			The most easy way is to copy the &quot;test&quot; directory and work from there. The &quot;test&quot; 
			directory is a tutorial plugin that shows how to create a plugin. After you copy the template you need to 
			change the red sections marked below to the name of your plugin this is needed so that plugins don't 
			overlap in other words it gives the plugin a unique name. Notice that when you write a new plugin,
			you have to end each javascript	instructions by ";", even if it's optionnal in javascript.
		</p>

		<p>If you want you may add plugin specific options/settings but remember to namespace them in the 
			following format &quot;&lt;your plugin&gt;_&lt;option&gt;&quot; for example &quot;yourplugin_someoption&quot;.</p>
		
		<p>Specific callback functions that you don't need or doesn't do anything can be removed.</p>
		
		<p>If you want you can try the test plugin by adding the following parameters to the EditAreaLoader.init command.</p>
		<pre>end_toolbar: "*,test_but, |,test_select",
plugins: "test",</pre>
		
		<div class="separator"></div>
		<h3>Plugin directory structure</h3>
		<p>
		<table class="btable">
		<thead>
			<th>File/Directory</td>	
			<th>Description</td>	
		</thead>
		<tbody>
			<tr><td>css</td><td>Plugin specific CSS files</td></tr>
			<tr><td>images</td><td>Plugin specific images</td></tr>
			<tr><td>langs</td><td>Plugin specific language files</td></tr>
			<tr><td>&lt;your_plugin&gt;.js</td><td>Main plugin file</td></tr>
			
		</table>
		</p>
		<div class="separator"></div>
		<h3>Plugin example source</h3>
		<p>
		The example below shows a simple empty plugin and all possible callbacks.
		</p>
		<p>
		
		<div class="example">
		<pre>/**
 * Plugin designed for test prupose. It add a button (that manage an alert) and a select (that allow to insert tags) in the toolbar.
 * This plugin also disable the "f" key in the editarea, and load a CSS and a JS file
 */  
var EditArea_<span class='marked'>test</span>= {
	/**
	 * Get called once this file is loaded (editArea still not initialized)
	 *
	 * @return nothing	 
	 */	 	 	
	init: function(){	
		//	alert("test init: "+ this._someInternalFunction(2, 3));
		editArea.load_css(this.baseURL+"css/test.css");
		editArea.load_script(this.baseURL+"test2.js");
	}
	/**
	 * Returns the HTML code for a specific control string or false if this plugin doesn't have that control.
	 * A control can be a button, select list or any other HTML item to present in the EditArea user interface.
	 * Language variables such as {$lang_somekey} will also be replaced with contents from
	 * the language packs.
	 * 
	 * @param {string} ctrl_name: the name of the control to add	  
	 * @return HTML code for a specific control or false.
	 * @type string	or boolean
	 */	
	,get_control_html: function(ctrl_name){
		switch(ctrl_name){
			case "<span class='marked'>test_but</span>":
				// Control id, button img, isFileSpecific, command
				return parent.editAreaLoader.get_button_html('<span class='marked'>test_but</span>', '<span class='marked'>test.gif</span>', '<span class='marked'>test_cmd</span>', false, this.baseURL);
			case "<span class='marked'>test_select</span>":
				html= "&lt;select id='<span class='marked'>test_select</span>' onchange='javascript:editArea.execCommand(\"<span class='marked'>test_select_change</span>\")'&gt;"
					+"			&lt;option value='-1'&gt;<span class='marked'>{$test_select}</span>&lt;/option&gt;"
					+"			&lt;option value='h1'&gt;h1&lt;/option&gt;"
					+"			&lt;option value='h2'&gt;h2&lt;/option&gt;"
					+"			&lt;option value='h3'&gt;h3&lt;/option&gt;"
					+"			&lt;option value='h4'&gt;h4&lt;/option&gt;"
					+"			&lt;option value='h5'&gt;h5&lt;/option&gt;"
					+"			&lt;option value='h6'&gt;h6&lt;/option&gt;"
					+"		&lt;/select&gt;";
				return html;
		}
		return false;
	}
	/**
	 * Get called once EditArea is fully loaded and initialised
	 *	 
	 * @return nothing
	 */	 	 	
	,onload: function(){ 
		alert("test load");
	}
	
	/**
	 * Is called each time the user touch a keyboard key.
	 *	 
	 * @param (event) e: the keydown event
	 * @return true - pass to next handler in chain, false - stop chain execution
	 * @type boolean	 
	 */
	,onkeydown: function(e){
		var str= String.fromCharCode(e.keyCode);
		// desactivate the "f" character
		if(str.toLowerCase()=="f"){
			return true;
		}
		return false;
	}
	
	/**
	 * Executes a specific command, this function handles plugin commands.
	 *
	 * @param {string} cmd: the name of the command being executed
	 * @param {unknown} param: the parameter of the command	 
	 * @return true - pass to next handler in chain, false - stop chain execution
	 * @type boolean	
	 */
	,execCommand: function(cmd, param){
		// Handle commands
		switch(cmd){
			case "<span class='marked'>test_select_change</span>":
				var val= document.getElementById("test_select").value;
				if(val!=-1)
					parent.editAreaLoader.insertTags(editArea.id, "&lt;"+val+"&gt;", "&lt;/"+val+"&gt;");
				document.getElementById("test_select").options[0].selected=true; 
				return false;
			case "<span class='marked'>test_cmd</span>":
				alert("user clicked on test_cmd");
				return false;
		}
		// Pass to next handler in chain
		return true;
	}
	
	/**
	 * This is just an internal plugin method, prefix all internal methods with a _ character.
	 * The prefix is needed so they doesn't collide with future EditArea callback functions.
	 *
	 * @param {string} a Some arg1.
	 * @param {string} b Some arg2.
	 * @return Some return.
	 * @type unknown
	 */
	,_someInternalFunction : function(a, b) {
		return a+b;
	}
};

// Adds the plugin class to the list of available EditArea plugins
editArea.add_plugin("<span class='marked'>test</span>", EditArea_<span class='marked'>test</span>);</pre>
<br />
	</div>
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		<div class='copyright'>EditArea - &copy; Christophe Dolivet 2007-2010</div>
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	</div>
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