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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* JavaScript management
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* Collects information about which JavaScript
* files and objects are necessary to render
* the page and generates the relevant code.
*
* @package PhpMyAdmin
*/
class PMA_Scripts
{
/**
* An array of SCRIPT tags
*
* @access private
* @var array of strings
*/
private $_files;
/**
* An array of discrete javascript code snippets
*
* @access private
* @var array of strings
*/
private $_code;
/**
* An array of event names to bind and javascript code
* snippets to fire for the corresponding events
*
* @access private
* @var array
*/
private $_events;
/**
* Returns HTML code to include javascript file.
*
* @param array $files The list of js file to include
*
* @return string HTML code for javascript inclusion.
*/
private function _includeFiles($files)
{
$first_dynamic_scripts = "";
$dynamic_scripts = "";
$scripts = array();
foreach ($files as $value) {
if (/*overload*/mb_strpos($value['filename'], "?") !== false) {
if ($value['before_statics'] === true) {
$first_dynamic_scripts
.= "<script data-cfasync='false' type='text/javascript' src='js/"
. $value['filename'] . "'></script>";
} else {
$dynamic_scripts .= "<script data-cfasync='false' type='text/javascript' src='js/"
. $value['filename'] . "'></script>";
}
continue;
}
$include = true;
if ($value['conditional_ie'] !== false
&& PMA_USR_BROWSER_AGENT === 'IE'
) {
if ($value['conditional_ie'] === true) {
$include = true;
} else if ($value['conditional_ie'] == PMA_USR_BROWSER_VER) {
$include = true;
} else {
$include = false;
}
}
if ($include) {
$scripts[] = "scripts%5B%5D=" . $value['filename'];
}
}
$separator = PMA_URL_getArgSeparator();
$static_scripts = '';
// Using chunks of 10 files to avoid too long URLs
// as some servers are set to 512 bytes URL limit
$script_chunks = array_chunk($scripts, 10);
foreach ($script_chunks as $script_chunk) {
$url = 'js/get_scripts.js.php?' . implode($separator, $script_chunk);
$static_scripts .= sprintf(
'<script data-cfasync="false" type="text/javascript" src="%s"></script>',
htmlspecialchars($url)
);
}
return $first_dynamic_scripts . $static_scripts . $dynamic_scripts;
}
/**
* Generates new PMA_Scripts objects
*
* @return PMA_Scripts object
*/
public function __construct()
{
$this->_files = array();
$this->_code = '';
$this->_events = array();
}
/**
* Adds a new file to the list of scripts
*
* @param string $filename The name of the file to include
* @param bool $conditional_ie Whether to wrap the script tag in
* conditional comments for IE
* @param bool $before_statics Whether this dynamic script should be
* included before the static ones
*
* @return void
*/
public function addFile(
$filename,
$conditional_ie = false,
$before_statics = false
) {
$hash = md5($filename);
if (!empty($this->_files[$hash])) {
return;
}
$has_onload = $this->_eventBlacklist($filename);
$this->_files[$hash] = array(
'has_onload' => $has_onload,
'filename' => $filename,
'conditional_ie' => $conditional_ie,
'before_statics' => $before_statics
);
}
/**
* Add new files to the list of scripts
*
* @param array $filelist The array of file names
* @param bool $conditional_ie Whether to wrap the script tag in
* conditional comments for IE
*
* @return void
*/
public function addFiles($filelist, $conditional_ie = false)
{
foreach ($filelist as $filename) {
$this->addFile($filename, $conditional_ie);
}
}
/**
* Determines whether to fire up an onload event for a file
*
* @param string $filename The name of the file to be checked
* against the blacklist
*
* @return int 1 to fire up the event, 0 not to
*/
private function _eventBlacklist($filename)
{
if ( strpos($filename, 'jquery') !== false
|| strpos($filename, 'codemirror') !== false
|| strpos($filename, 'messages.php') !== false
|| strpos($filename, 'ajax.js') !== false
|| strpos($filename, 'navigation.js') !== false
|| strpos($filename, 'get_image.js.php') !== false
|| strpos($filename, 'cross_framing_protection.js') !== false
) {
return 0;
}
return 1;
}
/**
* Adds a new code snippet to the code to be executed
*
* @param string $code The JS code to be added
*
* @return void
*/
public function addCode($code)
{
$this->_code .= "$code\n";
}
/**
* Adds a new event to the list of events
*
* @param string $event The name of the event to register
* @param string $function The code to execute when the event fires
* E.g: 'function () { doSomething(); }'
* or 'doSomething'
*
* @return void
*/
public function addEvent($event, $function)
{
$this->_events[] = array(
'event' => $event,
'function' => $function
);
}
/**
* Returns a list with filenames and a flag to indicate
* whether to register onload events for this file
*
* @return array
*/
public function getFiles()
{
$retval = array();
foreach ($this->_files as $file) {
//If filename contains a "?", continue.
if (strpos($file['filename'], "?") !== false) {
continue;
}
if (! $file['conditional_ie'] || PMA_USR_BROWSER_AGENT == 'IE') {
$retval[] = array(
'name' => $file['filename'],
'fire' => $file['has_onload']
);
}
}
return $retval;
}
/**
* Renders all the JavaScript file inclusions, code and events
*
* @return string
*/
public function getDisplay()
{
$retval = '';
if (count($this->_files) > 0) {
$retval .= $this->_includeFiles(
$this->_files
);
}
$code = 'AJAX.scriptHandler';
foreach ($this->_files as $file) {
$code .= sprintf(
'.add("%s",%d)',
PMA_escapeJsString($file['filename']),
$file['has_onload'] ? 1 : 0
);
}
$code .= ';';
$this->addCode($code);
$code = '$(function() {';
foreach ($this->_files as $file) {
if ($file['has_onload']) {
$code .= 'AJAX.fireOnload("';
$code .= PMA_escapeJsString($file['filename']);
$code .= '");';
}
}
$code .= '});';
$this->addCode($code);
$retval .= '<script data-cfasync="false" type="text/javascript">';
$retval .= "// <![CDATA[\n";
$retval .= $this->_code;
foreach ($this->_events as $js_event) {
$retval .= sprintf(
"$(window).bind('%s', %s);\n",
$js_event['event'],
$js_event['function']
);
}
$retval .= '// ]]>';
$retval .= '</script>';
return $retval;
}
}