/usr/share/php/Horde/JavascriptMinify.php is in php-horde-javascriptminify 1.1.2-3build1.
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/**
* Copyright 2014-2015 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @category Horde
* @copyright 2014-2015 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package JavascriptMinify
*/
/**
* Abstract base class for implementing a javascript minification driver.
*
* @author Michael Slusarz <slusarz@horde.org>
* @category Horde
* @copyright 2014-2015 Horde LLC
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package JavascriptMinify
*/
abstract class Horde_JavascriptMinify
{
/**
* Original javascript data.
*
* @var mixed
*/
protected $_data;
/**
* Minification options.
*
* @var array
*/
protected $_opts = array();
/**
* Temporary file containing sourcemap data.
*
* @var string
*/
protected $_sourcemap = null;
/**
* Constructor.
*
* @param mixed $js Either a string (the JS text to compress) or an
* array of URLs (keys) to filenames (values)
* containing the JS data to compress.
* @param array $opts Additional options. See setOptions().
*/
public function __construct($js, array $opts = array())
{
if (!is_array($js) && !is_string($js)) {
throw new InvalidArgumentException('First argument must either be an array or a string.');
}
$this->_data = $js;
$this->setOptions($opts);
}
/**
* @see Horde_JavascriptMinify::minify()
*/
public function __toString()
{
return $this->minify();
}
/**
* Set minification options.
*
* @param array $opts Options:
* <pre>
* - logger: (Horde_Log_Logger) Log object to use for log messages.
* </pre>
*/
public function setOptions(array $opts = array())
{
$this->_opts = array_merge($this->_opts, $opts);
// Ensure we have a logger object.
if (!isset($this->_opts['logger']) ||
!($this->_opts['logger'] instanceof Horde_Log_Logger)) {
$this->_opts['logger'] = new Horde_Log_Logger(
new Horde_Log_Handler_Null()
);
}
}
/**
* Return the minified javascript.
*
* @return string Minified javascript.
* @throws Horde_JavascriptMinify_Exception
*/
abstract public function minify();
/**
* Returns the sourcemap data.
* Only supported if javascript is data is provided via web-accessible
* static files.
* minify() must be called before this method will return any data.
*
* @return mixed The sourcemap data, or null if it doesn't exist.
*/
public function sourcemap()
{
if (is_null($this->_sourcemap) ||
!is_readable($this->_sourcemap) ||
!strlen($sourcemap = file_get_contents($this->_sourcemap))) {
return null;
}
/* Sourcemap data is JSON encoded. Need to grab 'sources', which
* contains filenames, and convert to URLs. */
$sourcemap = json_decode($sourcemap);
$data_lookup = array_flip($this->_data);
$new_sources = array();
foreach ($sourcemap->sources as $val) {
$new_sources[] = $data_lookup[$val];
}
$sourcemap->sources = $new_sources;
unset($sourcemap->sourceRoot, $sourcemap->file);
return json_encode($sourcemap);
}
/**
* Creates a list of source comments linking to the original URLs of the
* source files.
*
* Needed in minification files to ensure that all license terms of the
* minified code (which may have been removed during the minification
* process) are accessible.
*
* @since 1.1.0
*
* @return string Source URL data.
*/
protected function _sourceUrls()
{
$out = '';
if (is_array($this->_data)) {
foreach (array_keys($this->_data) as $val) {
$out .= "\n// @source: " . $val;
}
}
return $out;
}
}
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