这几天都在研究FCKeditor的源代码 什么是FCKeditor?
几乎搜遍了Internet,似乎对于fckconfig.js这个文件讲解的很多,但对于fckeditor.js这个FCK的核心类文件的资料几乎为0.
所以,花了整整一天的时间,以挤牙膏的方式,对fckeditor.js这个fck核心类文件作了自己力所能及的注释,供同样学习fck的网友一个参考。
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- var FCKeditor = function (instanceName, width, height, toolbarSet, value){
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- this .InstanceName = instanceName;
- this .Width = width || '100%' ;
- this .Height = height || '200' ;
- this .ToolbarSet = toolbarSet || 'Default' ;
- this .Value = value || '' ;
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- this .BasePath = FCKeditor.BasePath;
- this .CheckBrowser = true ;
- this .DisplayErrors = true ;
- this .Config = new Object();
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- this .OnError = null ;
- }
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- FCKeditor.BasePath = '/fckeditor/' ;
- FCKeditor.MinHeight = 200;
- FCKeditor.MinWidth = 750;
- FCKeditor.prototype.Version = '2.6.5' ;
- FCKeditor.prototype.VersionBuild = '23959' ;
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- FCKeditor.prototype.Create = function (){
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- document.write(this .CreateHtml());
- }
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- FCKeditor.prototype.CreateHtml = function (){
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- if (! this .InstanceName || this .InstanceName.length == 0) {
- this ._ThrowError(701, 'You must specify an instance name.' );
- return '' ;
- }
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- var sHtml = '' ;
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- if (! this .CheckBrowser || this ._IsCompatibleBrowser()) {
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- sHtml += '<input type="hidden" id="' + this .InstanceName + '" name="' + this .InstanceName + '" value="' + this ._HTMLEncode( this .Value) + '" style="display:none" />' ;
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- sHtml += this ._GetConfigHtml();
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- sHtml += this ._GetIFrameHtml();
- }
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- else {
- var sWidth = this .Width.toString().indexOf( '%' ) > 0 ? this .Width : this .Width + 'px' ;
- var sHeight = this .Height.toString().indexOf( '%' ) > 0 ? this .Height : this .Height + 'px' ;
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- sHtml += '<textarea name="' + this .InstanceName +
- '" rows="4" cols="40" style="width:' +
- sWidth +
- ';height:' +
- sHeight;
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- if ( this .TabIndex)
- sHtml += '" tabindex="' + this .TabIndex;
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- sHtml += '">' +
- this ._HTMLEncode( this .Value) +
- '<//textarea>' ;
- }
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- return sHtml;
- }
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- FCKeditor.prototype.ReplaceTextarea = function (){
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- if (document.getElementById( this .InstanceName + '___Frame' ))
- return ;
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- if (! this .CheckBrowser || this ._IsCompatibleBrowser()) {
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- var oTextarea = document.getElementById( this .InstanceName);
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- var colElementsByName = document.getElementsByName( this .InstanceName);
- var i = 0;
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- while (oTextarea || i == 0) {
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- if (oTextarea && oTextarea.tagName.toLowerCase() == 'textarea' )
- break ;
- oTextarea = colElementsByName[i++];
- }
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- if (!oTextarea) {
- alert('Error: The TEXTAREA with id or name set to "' + this .InstanceName + '" was not found' );
- return ;
- }
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- oTextarea.style.display = 'none' ;
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- if (oTextarea.tabIndex)
- this .TabIndex = oTextarea.tabIndex;
- this ._InsertHtmlBefore( this ._GetConfigHtml(), oTextarea);
- this ._InsertHtmlBefore( this ._GetIFrameHtml(), oTextarea);
- }
- }
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- FCKeditor.prototype._InsertHtmlBefore = function (html, element){
- if (element.insertAdjacentHTML)
- element.insertAdjacentHTML('beforeBegin' , html);
- else
- {
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- var oRange = document.createRange();
- oRange.setStartBefore(element);
- var oFragment = oRange.createContextualFragment(html);
- element.parentNode.insertBefore(oFragment, element);
- }
- }
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- FCKeditor.prototype._GetConfigHtml = function (){
- var sConfig = '' ;
- for ( var o in this .Config) {
- if (sConfig.length > 0)
- sConfig += '&' ;
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- sConfig += encodeURIComponent(o) + '=' + encodeURIComponent( this .Config[o]);
- }
- return '<input type="hidden" id="' + this .InstanceName + '___Config" value="' + sConfig + '" style="display:none" />' ;
- }
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- FCKeditor.prototype._GetIFrameHtml = function (){
- var sFile = 'fckeditor.html' ;
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- try {
- if ((/fcksource= true /i).test(window.top.location.search))
- sFile = 'fckeditor.original.html' ;
- }
- catch (e) {
- }
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- var sLink = this .BasePath + 'editor/' + sFile + '?InstanceName=' + encodeURIComponent( this .InstanceName);
- if ( this .ToolbarSet)
- sLink += '&Toolbar=' + this .ToolbarSet;
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- var html = '<iframe id="' + this .InstanceName +
- '___Frame" src="' +
- sLink +
- '" width="' +
- this .Width +
- '" height="' +
- this .Height;
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- if ( this .TabIndex)
- html += '" tabindex="' + this .TabIndex;
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- html += '" frameborder="0" scrolling="no"></iframe>' ;
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- return html;
- }
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- FCKeditor.prototype._IsCompatibleBrowser = function (){
- return FCKeditor_IsCompatibleBrowser();
- }
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- FCKeditor.prototype._ThrowError = function (errorNumber, errorDescription){
- this .ErrorNumber = errorNumber;
- this .ErrorDescription = errorDescription;
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- if ( this .DisplayErrors) {
- document.write('<div style="COLOR: #ff0000">' );
- document.write('[ FCKeditor Error ' + this .ErrorNumber + ': ' + this .ErrorDescription + ' ]' );
- document.write('</div>' );
- }
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- if ( typeof ( this .OnError) == 'function' )
- this .OnError( this , errorNumber, errorDescription);
- }
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- FCKeditor.prototype._HTMLEncode = function (text){
- if ( typeof (text) != "string" )
- text = text.toString();
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- text = text.replace(/&/g, "&" ).replace(/ "/g, " " ").replace(/</g, " < ").replace(/>/g, " >");
- return text;
- };
- (function (){
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- var textareaToEditor = function (textarea){
- var editor = new FCKeditor(textarea.name);
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- editor.Width = Math.max(textarea.offsetWidth, FCKeditor.MinWidth);
- editor.Height = Math.max(textarea.offsetHeight, FCKeditor.MinHeight);
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- return editor;
- }
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- FCKeditor.ReplaceAllTextareas = function (){
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- var textareas = document.getElementsByTagName( 'textarea' );
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- for ( var i = 0; i < textareas.length; i++) {
- var editor = null ;
- var textarea = textareas[i];
- var name = textarea.name;
-
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- if (!name || name.length == 0)
- continue ;
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- if ( typeof arguments[0] == 'string' ) {
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- var classRegex = new RegExp( '(?:^| )' + arguments[0] + '(?:$| )' );
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- if (!classRegex.test(textarea.className))
- continue ;
- }
- else
- if ( typeof arguments[0] == 'function' ) {
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- editor = textareaToEditor(textarea);
- if (arguments[0](textarea, editor) === false )
- continue ;
- }
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- if (!editor)
- editor = textareaToEditor(textarea);
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- editor.ReplaceTextarea();
- }
- }
- })();
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- function FCKeditor_IsCompatibleBrowser(){
- var sAgent = navigator.userAgent.toLowerCase();
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- if ( false && sAgent.indexOf( "mac" ) == -1)
- {
- var sBrowserVersion = navigator.appVersion.match(/MSIE (./..)/)[1];
- return (sBrowserVersion >= 5.5);
- }
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- if (navigator.product == "Gecko" && navigator.productSub >= 20030210 && !( typeof (opera) == 'object' && opera.postError))
- return true ;
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- if (window.opera && window.opera.version && parseFloat(window.opera.version()) >= 9.5)
- return true ;
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- if (sAgent.indexOf( ' adobeair/' ) != -1)
- return (sAgent.match(/ adobeair//(/d+)/)[1] >= 1);
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- if (sAgent.indexOf( ' applewebkit/' ) != -1)
- return (sAgent.match(/ applewebkit//(/d+)/)[1] >= 522);
- return false ;
- }