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<?php
/*
* Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.html or http://ckeditor.com/license
*/
/**
* \brief CKEditor class that can be used to create editor
* instances in PHP pages on server side.
* @see http://ckeditor.com
*
* Sample usage:
* @code
* $CKEditor = new CKEditor();
* $CKEditor->editor("editor1", "<p>Initial value.</p>");
* @endcode
*/
class CKEditor
{
/**
* The version of %CKEditor.
*/
const version = '3.4.1';
/**
* A constant string unique for each release of %CKEditor.
*/
const timestamp = 'A8LE4JO';
/**
* URL to the %CKEditor installation directory (absolute or relative to document root).
* If not set, CKEditor will try to guess it's path.
*
* Example usage:
* @code
* $CKEditor->basePath = '/ckeditor/';
* @endcode
*/
public $basePath;
/**
* An array that holds the global %CKEditor configuration.
* For the list of available options, see http://docs.cksource.com/ckeditor_api/symbols/CKEDITOR.config.html
*
* Example usage:
* @code
* $CKEditor->config['height'] = 400;
* // Use @@ at the beggining of a string to ouput it without surrounding quotes.
* $CKEditor->config['width'] = '@@screen.width * 0.8';
* @endcode
*/
public $config = array();
/**
* A boolean variable indicating whether CKEditor has been initialized.
* Set it to true only if you have already included
* <script> tag loading ckeditor.js in your website.
*/
public $initialized = false;
/**
* Boolean variable indicating whether created code should be printed out or returned by a function.
*
* Example 1: get the code creating %CKEditor instance and print it on a page with the "echo" function.
* @code
* $CKEditor = new CKEditor();
* $CKEditor->returnOutput = true;
* $code = $CKEditor->editor("editor1", "<p>Initial value.</p>");
* echo "<p>Editor 1:</p>";
* echo $code;
* @endcode
*/
public $returnOutput = false;
/**
* An array with textarea attributes.
*
* When %CKEditor is created with the editor() method, a HTML <textarea> element is created,
* it will be displayed to anyone with JavaScript disabled or with incompatible browser.
*/
public $textareaAttributes = array( "rows" => 8, "cols" => 60 );
/**
* A string indicating the creation date of %CKEditor.
* Do not change it unless you want to force browsers to not use previously cached version of %CKEditor.
*/
public $timestamp = "A8LE4JO";
/**
* An array that holds event listeners.
*/
private $events = array();
/**
* An array that holds global event listeners.
*/
private $globalEvents = array();
/**
* Main Constructor.
*
* @param $basePath (string) URL to the %CKEditor installation directory (optional).
*/
function __construct($basePath = null) {
if (!empty($basePath)) {
$this->basePath = $basePath;
}
}
/**
* Creates a %CKEditor instance.
* In incompatible browsers %CKEditor will downgrade to plain HTML <textarea> element.
*
* @param $name (string) Name of the %CKEditor instance (this will be also the "name" attribute of textarea element).
* @param $value (string) Initial value (optional).
* @param $config (array) The specific configurations to apply to this editor instance (optional).
* @param $events (array) Event listeners for this editor instance (optional).
*
* Example usage:
* @code
* $CKEditor = new CKEditor();
* $CKEditor->editor("field1", "<p>Initial value.</p>");
* @endcode
*
* Advanced example:
* @code
* $CKEditor = new CKEditor();
* $config = array();
* $config['toolbar'] = array(
* array( 'Source', '-', 'Bold', 'Italic', 'Underline', 'Strike' ),
* array( 'Image', 'Link', 'Unlink', 'Anchor' )
* );
* $events['instanceReady'] = 'function (ev) {
* alert("Loaded: " + ev.editor.name);
* }';
* $CKEditor->editor("field1", "<p>Initial value.</p>", $config, $events);
* @endcode
*/
public function editor($name, $value = "", $config = array(), $events = array())
{
$attr = "";
foreach ($this->textareaAttributes as $key => $val) {
$attr.= " " . $key . '="' . str_replace('"', '"', $val) . '"';
}
$out = "<textarea name=\"" . $name . "\"" . $attr . ">" . htmlspecialchars($value) . "</textarea>\n";
if (!$this->initialized) {
$out .= $this->init();
}
$_config = $this->configSettings($config, $events);
$js = $this->returnGlobalEvents();
if (!empty($_config))
$js .= "CKEDITOR.replace('".$name."', ".$this->jsEncode($_config).");";
else
$js .= "CKEDITOR.replace('".$name."');";
$out .= $this->script($js);
if (!$this->returnOutput) {
print $out;
$out = "";
}
return $out;
}
/**
* Replaces a <textarea> with a %CKEditor instance.
*
* @param $id (string) The id or name of textarea element.
* @param $config (array) The specific configurations to apply to this editor instance (optional).
* @param $events (array) Event listeners for this editor instance (optional).
*
* Example 1: adding %CKEditor to <textarea name="article"></textarea> element:
* @code
* $CKEditor = new CKEditor();
* $CKEditor->replace("article");
* @endcode
*/
public function replace($id, $config = array(), $events = array())
{
$out = "";
if (!$this->initialized) {
$out .= $this->init();
}
$_config = $this->configSettings($config, $events);
$js = $this->returnGlobalEvents();
if (!empty($_config)) {
$js .= "CKEDITOR.replace('".$id."', ".$this->jsEncode($_config).");";
}
else {
$js .= "CKEDITOR.replace('".$id."');";
}
$out .= $this->script($js);
if (!$this->returnOutput) {
print $out;
$out = "";
}
return $out;
}
/**
* Replace all <textarea> elements available in the document with editor instances.
*
* @param $className (string) If set, replace all textareas with class className in the page.
*
* Example 1: replace all <textarea> elements in the page.
* @code
* $CKEditor = new CKEditor();
* $CKEditor->replaceAll();
* @endcode
*
* Example 2: replace all <textarea class="myClassName"> elements in the page.
* @code
* $CKEditor = new CKEditor();
* $CKEditor->replaceAll( 'myClassName' );
* @endcode
*/
public function replaceAll($className = null)
{
$out = "";
if (!$this->initialized) {
$out .= $this->init();
}
$_config = $this->configSettings();
$js = $this->returnGlobalEvents();
if (empty($_config)) {
if (empty($className)) {
$js .= "CKEDITOR.replaceAll();";
}
else {
$js .= "CKEDITOR.replaceAll('".$className."');";
}
}
else {
$classDetection = "";
$js .= "CKEDITOR.replaceAll( function(textarea, config) {\n";
if (!empty($className)) {
$js .= " var classRegex = new RegExp('(?:^| )' + '". $className ."' + '(?:$| )');\n";
$js .= " if (!classRegex.test(textarea.className))\n";
$js .= " return false;\n";
}
$js .= " CKEDITOR.tools.extend(config, ". $this->jsEncode($_config) .", true);";
$js .= "} );";
}
$out .= $this->script($js);
if (!$this->returnOutput) {
print $out;
$out = "";
}
return $out;
}
/**
* Adds event listener.
* Events are fired by %CKEditor in various situations.
*
* @param $event (string) Event name.
* @param $javascriptCode (string) Javascript anonymous function or function name.
*
* Example usage:
* @code
* $CKEditor->addEventHandler('instanceReady', 'function (ev) {
* alert("Loaded: " + ev.editor.name);
* }');
* @endcode
*/
public function addEventHandler($event, $javascriptCode)
{
if (!isset($this->events[$event])) {
$this->events[$event] = array();
}
// Avoid duplicates.
if (!in_array($javascriptCode, $this->events[$event])) {
$this->events[$event][] = $javascriptCode;
}
}
/**
* Clear registered event handlers.
* Note: this function will have no effect on already created editor instances.
*
* @param $event (string) Event name, if not set all event handlers will be removed (optional).
*/
public function clearEventHandlers($event = null)
{
if (!empty($event)) {
$this->events[$event] = array();
}
else {
$this->events = array();
}
}
/**
* Adds global event listener.
*
* @param $event (string) Event name.
* @param $javascriptCode (string) Javascript anonymous function or function name.
*
* Example usage:
* @code
* $CKEditor->addGlobalEventHandler('dialogDefinition', 'function (ev) {
* alert("Loading dialog: " + ev.data.name);
* }');
* @endcode
*/
public function addGlobalEventHandler($event, $javascriptCode)
{
if (!isset($this->globalEvents[$event])) {
$this->globalEvents[$event] = array();
}
// Avoid duplicates.
if (!in_array($javascriptCode, $this->globalEvents[$event])) {
$this->globalEvents[$event][] = $javascriptCode;
}
}
/**
* Clear registered global event handlers.
* Note: this function will have no effect if the event handler has been already printed/returned.
*
* @param $event (string) Event name, if not set all event handlers will be removed (optional).
*/
public function clearGlobalEventHandlers($event = null)
{
if (!empty($event)) {
$this->globalEvents[$event] = array();
}
else {
$this->globalEvents = array();
}
}
/**
* Prints javascript code.
*
* @param string $js
*/
private function script($js)
{
$out = "<script type=\"text/javascript\">";
$out .= "//<![CDATA[\n";
$out .= $js;
$out .= "\n//]]>";
$out .= "</script>\n";
return $out;
}
/**
* Returns the configuration array (global and instance specific settings are merged into one array).
*
* @param $config (array) The specific configurations to apply to editor instance.
* @param $events (array) Event listeners for editor instance.
*/
private function configSettings($config = array(), $events = array())
{
$_config = $this->config;
$_events = $this->events;
if (is_array($config) && !empty($config)) {
$_config = array_merge($_config, $config);
}
if (is_array($events) && !empty($events)) {
foreach ($events as $eventName => $code) {
if (!isset($_events[$eventName])) {
$_events[$eventName] = array();
}
if (!in_array($code, $_events[$eventName])) {
$_events[$eventName][] = $code;
}
}
}
if (!empty($_events)) {
foreach($_events as $eventName => $handlers) {
if (empty($handlers)) {
continue;
}
else if (count($handlers) == 1) {
$_config['on'][$eventName] = '@@'.$handlers[0];
}
else {
$_config['on'][$eventName] = '@@function (ev){';
foreach ($handlers as $handler => $code) {
$_config['on'][$eventName] .= '('.$code.')(ev);';
}
$_config['on'][$eventName] .= '}';
}
}
}
return $_config;
}
/**
* Return global event handlers.
*/
private function returnGlobalEvents()
{
static $returnedEvents;
$out = "";
if (!isset($returnedEvents)) {
$returnedEvents = array();
}
if (!empty($this->globalEvents)) {
foreach ($this->globalEvents as $eventName => $handlers) {
foreach ($handlers as $handler => $code) {
if (!isset($returnedEvents[$eventName])) {
$returnedEvents[$eventName] = array();
}
// Return only new events
if (!in_array($code, $returnedEvents[$eventName])) {
$out .= ($code ? "\n" : "") . "CKEDITOR.on('". $eventName ."', $code);";
$returnedEvents[$eventName][] = $code;
}
}
}
}
return $out;
}
/**
* Initializes CKEditor (executed only once).
*/
private function init()
{
static $initComplete;
$out = "";
if (!empty($initComplete)) {
return "";
}
if ($this->initialized) {
$initComplete = true;
return "";
}
$args = "";
$ckeditorPath = $this->ckeditorPath();
if (!empty($this->timestamp) && $this->timestamp != "%"."TIMESTAMP%") {
$args = '?t=' . $this->timestamp;
}
// Skip relative paths...
if (strpos($ckeditorPath, '..') !== 0) {
$out .= $this->script("window.CKEDITOR_BASEPATH='". $ckeditorPath ."';");
}
$out .= "<script type=\"text/javascript\" src=\"" . $ckeditorPath . 'ckeditor.js' . $args . "\"></script>\n";
$extraCode = "";
if ($this->timestamp != self::timestamp) {
$extraCode .= ($extraCode ? "\n" : "") . "CKEDITOR.timestamp = '". $this->timestamp ."';";
}
if ($extraCode) {
$out .= $this->script($extraCode);
}
$initComplete = $this->initialized = true;
return $out;
}
/**
* Return path to ckeditor.js.
*/
private function ckeditorPath()
{
if (!empty($this->basePath)) {
return $this->basePath;
}
/**
* The absolute pathname of the currently executing script.
* Note: If a script is executed with the CLI, as a relative path, such as file.php or ../file.php,
* $_SERVER['SCRIPT_FILENAME'] will contain the relative path specified by the user.
*/
if (isset($_SERVER['SCRIPT_FILENAME'])) {
$realPath = dirname($_SERVER['SCRIPT_FILENAME']);
}
else {
/**
* realpath — Returns canonicalized absolute pathname
*/
$realPath = realpath( './' ) ;
}
/**
* The filename of the currently executing script, relative to the document root.
* For instance, $_SERVER['PHP_SELF'] in a script at the address http://example.com/test.php/foo.bar
* would be /test.php/foo.bar.
*/
$selfPath = dirname($_SERVER['PHP_SELF']);
$file = str_replace("\\", "/", __FILE__);
if (!$selfPath || !$realPath || !$file) {
return "/ckeditor/";
}
$documentRoot = substr($realPath, 0, strlen($realPath) - strlen($selfPath));
$fileUrl = substr($file, strlen($documentRoot));
$ckeditorUrl = str_replace("ckeditor_php5.php", "", $fileUrl);
return $ckeditorUrl;
}
/**
* This little function provides a basic JSON support.
* http://php.net/manual/en/function.json-encode.php
*
* @param mixed $val
* @return string
*/
private function jsEncode($val)
{
if (is_null($val)) {
return 'null';
}
if ($val === false) {
return 'false';
}
if ($val === true) {
return 'true';
}
if (is_scalar($val))
{
if (is_float($val))
{
// Always use "." for floats.
$val = str_replace(",", ".", strval($val));
}
// Use @@ to not use quotes when outputting string value
if (strpos($val, '@@') === 0) {
return substr($val, 2);
}
else {
// All scalars are converted to strings to avoid indeterminism.
// PHP's "1" and 1 are equal for all PHP operators, but
// JS's "1" and 1 are not. So if we pass "1" or 1 from the PHP backend,
// we should get the same result in the JS frontend (string).
// Character replacements for JSON.
static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'),
array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
$val = str_replace($jsonReplaces[0], $jsonReplaces[1], $val);
return '"' . $val . '"';
}
}
$isList = true;
for ($i = 0, reset($val); $i < count($val); $i++, next($val))
{
if (key($val) !== $i)
{
$isList = false;
break;
}
}
$result = array();
if ($isList)
{
foreach ($val as $v) $result[] = $this->jsEncode($v);
return '[ ' . join(', ', $result) . ' ]';
}
else
{
foreach ($val as $k => $v) $result[] = $this->jsEncode($k).': '.$this->jsEncode($v);
return '{ ' . join(', ', $result) . ' }';
}
}
}