129 lines
5 KiB
PHP
129 lines
5 KiB
PHP
<?php
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/*
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+--------------------------------------------------------------------+
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| CiviCRM version 4.7 |
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+--------------------------------------------------------------------+
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| Copyright CiviCRM LLC (c) 2004-2017 |
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+--------------------------------------------------------------------+
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| This file is a part of CiviCRM. |
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| CiviCRM is free software; you can copy, modify, and distribute it |
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| under the terms of the GNU Affero General Public License |
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| Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
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| |
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| CiviCRM is distributed in the hope that it will be useful, but |
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| WITHOUT ANY WARRANTY; without even the implied warranty of |
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| See the GNU Affero General Public License for more details. |
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| You should have received a copy of the GNU Affero General Public |
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| License and the CiviCRM Licensing Exception along |
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| with this program; if not, contact CiviCRM LLC |
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| at info[AT]civicrm[DOT]org. If you have questions about the |
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| GNU Affero General Public License or the licensing of CiviCRM, |
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| see the CiviCRM license FAQ at http://civicrm.org/licensing |
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+--------------------------------------------------------------------+
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*/
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/**
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* Parse Javascript content and extract translatable strings.
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*
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* @package CRM
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* @copyright CiviCRM LLC (c) 2004-2017
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*/
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class CRM_Utils_JS {
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/**
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* Parse a javascript file for translatable strings.
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*
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* @param string $jsCode
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* Raw Javascript code.
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* @return array
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* Array of translatable strings
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*/
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public static function parseStrings($jsCode) {
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$strings = array();
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// Match all calls to ts() in an array.
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// Note: \s also matches newlines with the 's' modifier.
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preg_match_all('~
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[^\w]ts\s* # match "ts" with whitespace
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\(\s* # match "(" argument list start
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((?:(?:\'(?:\\\\\'|[^\'])*\'|"(?:\\\\"|[^"])*")(?:\s*\+\s*)?)+)\s*
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[,\)] # match ")" or "," to finish
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~sx', $jsCode, $matches);
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foreach ($matches[1] as $text) {
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$quote = $text[0];
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// Remove newlines
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$text = str_replace("\\\n", '', $text);
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// Unescape escaped quotes
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$text = str_replace('\\' . $quote, $quote, $text);
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// Remove end quotes
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$text = substr(ltrim($text, $quote), 0, -1);
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$strings[$text] = $text;
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}
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return array_values($strings);
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}
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/**
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* Identify duplicate, adjacent, identical closures and consolidate them.
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*
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* Note that you can only dedupe closures if they are directly adjacent and
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* have exactly the same parameters.
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*
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* @param array $scripts
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* Javascript source.
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* @param array $localVars
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* Ordered list of JS vars to identify the start of a closure.
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* @param array $inputVals
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* Ordered list of input values passed into the closure.
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* @return string
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* Javascript source.
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*/
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public static function dedupeClosures($scripts, $localVars, $inputVals) {
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// Example opening: (function (angular, $, _) {
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$opening = '\s*\(\s*function\s*\(\s*';
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$opening .= implode(',\s*', array_map(function ($v) {
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return preg_quote($v, '/');
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}, $localVars));
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$opening .= '\)\s*\{';
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$opening = '/^' . $opening . '/';
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// Example closing: })(angular, CRM.$, CRM._);
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$closing = '\}\s*\)\s*\(\s*';
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$closing .= implode(',\s*', array_map(function ($v) {
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return preg_quote($v, '/');
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}, $inputVals));
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$closing .= '\);\s*';
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$closing = "/$closing\$/";
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$scripts = array_values($scripts);
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for ($i = count($scripts) - 1; $i > 0; $i--) {
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if (preg_match($closing, $scripts[$i - 1]) && preg_match($opening, $scripts[$i])) {
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$scripts[$i - 1] = preg_replace($closing, '', $scripts[$i - 1]);
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$scripts[$i] = preg_replace($opening, '', $scripts[$i]);
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}
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}
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return $scripts;
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}
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/**
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* This is a primitive comment stripper. It doesn't catch all comments
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* and falls short of minification, but it doesn't munge Angular injections
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* and is fast enough to run synchronously (without caching).
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*
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* At time of writing, running this against the Angular modules, this impl
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* of stripComments currently adds 10-20ms and cuts ~7%.
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*
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* Please be extremely cautious about extending this. If you want better
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* minification, you should probably remove this implementation,
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* import a proper JSMin implementation, and cache its output.
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*
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* @param string $script
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* @return string
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*/
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public static function stripComments($script) {
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return preg_replace(":^\\s*//[^\n]+$:m", "", $script);
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}
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}
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