|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* JavaScript minifier |
|
4
|
|
|
* |
|
5
|
|
|
* Please report bugs on https://github.com/matthiasmullie/minify/issues |
|
6
|
|
|
* |
|
7
|
|
|
* @author Matthias Mullie <[email protected]> |
|
8
|
|
|
* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved |
|
9
|
|
|
* @license MIT License |
|
10
|
|
|
*/ |
|
11
|
|
|
namespace MatthiasMullie\Minify; |
|
12
|
|
|
|
|
13
|
|
|
/** |
|
14
|
|
|
* JavaScript Minifier Class |
|
15
|
|
|
* |
|
16
|
|
|
* Please report bugs on https://github.com/matthiasmullie/minify/issues |
|
17
|
|
|
* |
|
18
|
|
|
* @package Minify |
|
19
|
|
|
* @author Matthias Mullie <[email protected]> |
|
20
|
|
|
* @author Tijs Verkoyen <[email protected]> |
|
21
|
|
|
* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved |
|
22
|
|
|
* @license MIT License |
|
23
|
|
|
*/ |
|
24
|
|
|
class JS extends Minify |
|
25
|
|
|
{ |
|
26
|
|
|
/** |
|
27
|
|
|
* Var-matching regex based on http://stackoverflow.com/a/9337047/802993. |
|
28
|
|
|
* |
|
29
|
|
|
* Note that regular expressions using that bit must have the PCRE_UTF8 |
|
30
|
|
|
* pattern modifier (/u) set. |
|
31
|
|
|
* |
|
32
|
|
|
* @var string |
|
33
|
|
|
*/ |
|
34
|
|
|
const REGEX_VARIABLE = '\b[$A-Z\_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\x{02c1}\x{02c6}-\x{02d1}\x{02e0}-\x{02e4}\x{02ec}\x{02ee}\x{0370}-\x{0374}\x{0376}\x{0377}\x{037a}-\x{037d}\x{0386}\x{0388}-\x{038a}\x{038c}\x{038e}-\x{03a1}\x{03a3}-\x{03f5}\x{03f7}-\x{0481}\x{048a}-\x{0527}\x{0531}-\x{0556}\x{0559}\x{0561}-\x{0587}\x{05d0}-\x{05ea}\x{05f0}-\x{05f2}\x{0620}-\x{064a}\x{066e}\x{066f}\x{0671}-\x{06d3}\x{06d5}\x{06e5}\x{06e6}\x{06ee}\x{06ef}\x{06fa}-\x{06fc}\x{06ff}\x{0710}\x{0712}-\x{072f}\x{074d}-\x{07a5}\x{07b1}\x{07ca}-\x{07ea}\x{07f4}\x{07f5}\x{07fa}\x{0800}-\x{0815}\x{081a}\x{0824}\x{0828}\x{0840}-\x{0858}\x{08a0}\x{08a2}-\x{08ac}\x{0904}-\x{0939}\x{093d}\x{0950}\x{0958}-\x{0961}\x{0971}-\x{0977}\x{0979}-\x{097f}\x{0985}-\x{098c}\x{098f}\x{0990}\x{0993}-\x{09a8}\x{09aa}-\x{09b0}\x{09b2}\x{09b6}-\x{09b9}\x{09bd}\x{09ce}\x{09dc}\x{09dd}\x{09df}-\x{09e1}\x{09f0}\x{09f1}\x{0a05}-\x{0a0a}\x{0a0f}\x{0a10}\x{0a13}-\x{0a28}\x{0a2a}-\x{0a30}\x{0a32}\x{0a33}\x{0a35}\x{0a36}\x{0a38}\x{0a39}\x{0a59}-\x{0a5c}\x{0a5e}\x{0a72}-\x{0a74}\x{0a85}-\x{0a8d}\x{0a8f}-\x{0a91}\x{0a93}-\x{0aa8}\x{0aaa}-\x{0ab0}\x{0ab2}\x{0ab3}\x{0ab5}-\x{0ab9}\x{0abd}\x{0ad0}\x{0ae0}\x{0ae1}\x{0b05}-\x{0b0c}\x{0b0f}\x{0b10}\x{0b13}-\x{0b28}\x{0b2a}-\x{0b30}\x{0b32}\x{0b33}\x{0b35}-\x{0b39}\x{0b3d}\x{0b5c}\x{0b5d}\x{0b5f}-\x{0b61}\x{0b71}\x{0b83}\x{0b85}-\x{0b8a}\x{0b8e}-\x{0b90}\x{0b92}-\x{0b95}\x{0b99}\x{0b9a}\x{0b9c}\x{0b9e}\x{0b9f}\x{0ba3}\x{0ba4}\x{0ba8}-\x{0baa}\x{0bae}-\x{0bb9}\x{0bd0}\x{0c05}-\x{0c0c}\x{0c0e}-\x{0c10}\x{0c12}-\x{0c28}\x{0c2a}-\x{0c33}\x{0c35}-\x{0c39}\x{0c3d}\x{0c58}\x{0c59}\x{0c60}\x{0c61}\x{0c85}-\x{0c8c}\x{0c8e}-\x{0c90}\x{0c92}-\x{0ca8}\x{0caa}-\x{0cb3}\x{0cb5}-\x{0cb9}\x{0cbd}\x{0cde}\x{0ce0}\x{0ce1}\x{0cf1}\x{0cf2}\x{0d05}-\x{0d0c}\x{0d0e}-\x{0d10}\x{0d12}-\x{0d3a}\x{0d3d}\x{0d4e}\x{0d60}\x{0d61}\x{0d7a}-\x{0d7f}\x{0d85}-\x{0d96}\x{0d9a}-\x{0db1}\x{0db3}-\x{0dbb}\x{0dbd}\x{0dc0}-\x{0dc6}\x{0e01}-\x{0e30}\x{0e32}\x{0e33}\x{0e40}-\x{0e46}\x{0e81}\x{0e82}\x{0e84}\x{0e87}\x{0e88}\x{0e8a}\x{0e8d}\x{0e94}-\x{0e97}\x{0e99}-\x{0e9f}\x{0ea1}-\x{0ea3}\x{0ea5}\x{0ea7}\x{0eaa}\x{0eab}\x{0ead}-\x{0eb0}\x{0eb2}\x{0eb3}\x{0ebd}\x{0ec0}-\x{0ec4}\x{0ec6}\x{0edc}-\x{0edf}\x{0f00}\x{0f40}-\x{0f47}\x{0f49}-\x{0f6c}\x{0f88}-\x{0f8c}\x{1000}-\x{102a}\x{103f}\x{1050}-\x{1055}\x{105a}-\x{105d}\x{1061}\x{1065}\x{1066}\x{106e}-\x{1070}\x{1075}-\x{1081}\x{108e}\x{10a0}-\x{10c5}\x{10c7}\x{10cd}\x{10d0}-\x{10fa}\x{10fc}-\x{1248}\x{124a}-\x{124d}\x{1250}-\x{1256}\x{1258}\x{125a}-\x{125d}\x{1260}-\x{1288}\x{128a}-\x{128d}\x{1290}-\x{12b0}\x{12b2}-\x{12b5}\x{12b8}-\x{12be}\x{12c0}\x{12c2}-\x{12c5}\x{12c8}-\x{12d6}\x{12d8}-\x{1310}\x{1312}-\x{1315}\x{1318}-\x{135a}\x{1380}-\x{138f}\x{13a0}-\x{13f4}\x{1401}-\x{166c}\x{166f}-\x{167f}\x{1681}-\x{169a}\x{16a0}-\x{16ea}\x{16ee}-\x{16f0}\x{1700}-\x{170c}\x{170e}-\x{1711}\x{1720}-\x{1731}\x{1740}-\x{1751}\x{1760}-\x{176c}\x{176e}-\x{1770}\x{1780}-\x{17b3}\x{17d7}\x{17dc}\x{1820}-\x{1877}\x{1880}-\x{18a8}\x{18aa}\x{18b0}-\x{18f5}\x{1900}-\x{191c}\x{1950}-\x{196d}\x{1970}-\x{1974}\x{1980}-\x{19ab}\x{19c1}-\x{19c7}\x{1a00}-\x{1a16}\x{1a20}-\x{1a54}\x{1aa7}\x{1b05}-\x{1b33}\x{1b45}-\x{1b4b}\x{1b83}-\x{1ba0}\x{1bae}\x{1baf}\x{1bba}-\x{1be5}\x{1c00}-\x{1c23}\x{1c4d}-\x{1c4f}\x{1c5a}-\x{1c7d}\x{1ce9}-\x{1cec}\x{1cee}-\x{1cf1}\x{1cf5}\x{1cf6}\x{1d00}-\x{1dbf}\x{1e00}-\x{1f15}\x{1f18}-\x{1f1d}\x{1f20}-\x{1f45}\x{1f48}-\x{1f4d}\x{1f50}-\x{1f57}\x{1f59}\x{1f5b}\x{1f5d}\x{1f5f}-\x{1f7d}\x{1f80}-\x{1fb4}\x{1fb6}-\x{1fbc}\x{1fbe}\x{1fc2}-\x{1fc4}\x{1fc6}-\x{1fcc}\x{1fd0}-\x{1fd3}\x{1fd6}-\x{1fdb}\x{1fe0}-\x{1fec}\x{1ff2}-\x{1ff4}\x{1ff6}-\x{1ffc}\x{2071}\x{207f}\x{2090}-\x{209c}\x{2102}\x{2107}\x{210a}-\x{2113}\x{2115}\x{2119}-\x{211d}\x{2124}\x{2126}\x{2128}\x{212a}-\x{212d}\x{212f}-\x{2139}\x{213c}-\x{213f}\x{2145}-\x{2149}\x{214e}\x{2160}-\x{2188}\x{2c00}-\x{2c2e}\x{2c30}-\x{2c5e}\x{2c60}-\x{2ce4}\x{2ceb}-\x{2cee}\x{2cf2}\x{2cf3}\x{2d00}-\x{2d25}\x{2d27}\x{2d2d}\x{2d30}-\x{2d67}\x{2d6f}\x{2d80}-\x{2d96}\x{2da0}-\x{2da6}\x{2da8}-\x{2dae}\x{2db0}-\x{2db6}\x{2db8}-\x{2dbe}\x{2dc0}-\x{2dc6}\x{2dc8}-\x{2dce}\x{2dd0}-\x{2dd6}\x{2dd8}-\x{2dde}\x{2e2f}\x{3005}-\x{3007}\x{3021}-\x{3029}\x{3031}-\x{3035}\x{3038}-\x{303c}\x{3041}-\x{3096}\x{309d}-\x{309f}\x{30a1}-\x{30fa}\x{30fc}-\x{30ff}\x{3105}-\x{312d}\x{3131}-\x{318e}\x{31a0}-\x{31ba}\x{31f0}-\x{31ff}\x{3400}-\x{4db5}\x{4e00}-\x{9fcc}\x{a000}-\x{a48c}\x{a4d0}-\x{a4fd}\x{a500}-\x{a60c}\x{a610}-\x{a61f}\x{a62a}\x{a62b}\x{a640}-\x{a66e}\x{a67f}-\x{a697}\x{a6a0}-\x{a6ef}\x{a717}-\x{a71f}\x{a722}-\x{a788}\x{a78b}-\x{a78e}\x{a790}-\x{a793}\x{a7a0}-\x{a7aa}\x{a7f8}-\x{a801}\x{a803}-\x{a805}\x{a807}-\x{a80a}\x{a80c}-\x{a822}\x{a840}-\x{a873}\x{a882}-\x{a8b3}\x{a8f2}-\x{a8f7}\x{a8fb}\x{a90a}-\x{a925}\x{a930}-\x{a946}\x{a960}-\x{a97c}\x{a984}-\x{a9b2}\x{a9cf}\x{aa00}-\x{aa28}\x{aa40}-\x{aa42}\x{aa44}-\x{aa4b}\x{aa60}-\x{aa76}\x{aa7a}\x{aa80}-\x{aaaf}\x{aab1}\x{aab5}\x{aab6}\x{aab9}-\x{aabd}\x{aac0}\x{aac2}\x{aadb}-\x{aadd}\x{aae0}-\x{aaea}\x{aaf2}-\x{aaf4}\x{ab01}-\x{ab06}\x{ab09}-\x{ab0e}\x{ab11}-\x{ab16}\x{ab20}-\x{ab26}\x{ab28}-\x{ab2e}\x{abc0}-\x{abe2}\x{ac00}-\x{d7a3}\x{d7b0}-\x{d7c6}\x{d7cb}-\x{d7fb}\x{f900}-\x{fa6d}\x{fa70}-\x{fad9}\x{fb00}-\x{fb06}\x{fb13}-\x{fb17}\x{fb1d}\x{fb1f}-\x{fb28}\x{fb2a}-\x{fb36}\x{fb38}-\x{fb3c}\x{fb3e}\x{fb40}\x{fb41}\x{fb43}\x{fb44}\x{fb46}-\x{fbb1}\x{fbd3}-\x{fd3d}\x{fd50}-\x{fd8f}\x{fd92}-\x{fdc7}\x{fdf0}-\x{fdfb}\x{fe70}-\x{fe74}\x{fe76}-\x{fefc}\x{ff21}-\x{ff3a}\x{ff41}-\x{ff5a}\x{ff66}-\x{ffbe}\x{ffc2}-\x{ffc7}\x{ffca}-\x{ffcf}\x{ffd2}-\x{ffd7}\x{ffda}-\x{ffdc}][$A-Z\_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\x{02c1}\x{02c6}-\x{02d1}\x{02e0}-\x{02e4}\x{02ec}\x{02ee}\x{0370}-\x{0374}\x{0376}\x{0377}\x{037a}-\x{037d}\x{0386}\x{0388}-\x{038a}\x{038c}\x{038e}-\x{03a1}\x{03a3}-\x{03f5}\x{03f7}-\x{0481}\x{048a}-\x{0527}\x{0531}-\x{0556}\x{0559}\x{0561}-\x{0587}\x{05d0}-\x{05ea}\x{05f0}-\x{05f2}\x{0620}-\x{064a}\x{066e}\x{066f}\x{0671}-\x{06d3}\x{06d5}\x{06e5}\x{06e6}\x{06ee}\x{06ef}\x{06fa}-\x{06fc}\x{06ff}\x{0710}\x{0712}-\x{072f}\x{074d}-\x{07a5}\x{07b1}\x{07ca}-\x{07ea}\x{07f4}\x{07f5}\x{07fa}\x{0800}-\x{0815}\x{081a}\x{0824}\x{0828}\x{0840}-\x{0858}\x{08a0}\x{08a2}-\x{08ac}\x{0904}-\x{0939}\x{093d}\x{0950}\x{0958}-\x{0961}\x{0971}-\x{0977}\x{0979}-\x{097f}\x{0985}-\x{098c}\x{098f}\x{0990}\x{0993}-\x{09a8}\x{09aa}-\x{09b0}\x{09b2}\x{09b6}-\x{09b9}\x{09bd}\x{09ce}\x{09dc}\x{09dd}\x{09df}-\x{09e1}\x{09f0}\x{09f1}\x{0a05}-\x{0a0a}\x{0a0f}\x{0a10}\x{0a13}-\x{0a28}\x{0a2a}-\x{0a30}\x{0a32}\x{0a33}\x{0a35}\x{0a36}\x{0a38}\x{0a39}\x{0a59}-\x{0a5c}\x{0a5e}\x{0a72}-\x{0a74}\x{0a85}-\x{0a8d}\x{0a8f}-\x{0a91}\x{0a93}-\x{0aa8}\x{0aaa}-\x{0ab0}\x{0ab2}\x{0ab3}\x{0ab5}-\x{0ab9}\x{0abd}\x{0ad0}\x{0ae0}\x{0ae1}\x{0b05}-\x{0b0c}\x{0b0f}\x{0b10}\x{0b13}-\x{0b28}\x{0b2a}-\x{0b30}\x{0b32}\x{0b33}\x{0b35}-\x{0b39}\x{0b3d}\x{0b5c}\x{0b5d}\x{0b5f}-\x{0b61}\x{0b71}\x{0b83}\x{0b85}-\x{0b8a}\x{0b8e}-\x{0b90}\x{0b92}-\x{0b95}\x{0b99}\x{0b9a}\x{0b9c}\x{0b9e}\x{0b9f}\x{0ba3}\x{0ba4}\x{0ba8}-\x{0baa}\x{0bae}-\x{0bb9}\x{0bd0}\x{0c05}-\x{0c0c}\x{0c0e}-\x{0c10}\x{0c12}-\x{0c28}\x{0c2a}-\x{0c33}\x{0c35}-\x{0c39}\x{0c3d}\x{0c58}\x{0c59}\x{0c60}\x{0c61}\x{0c85}-\x{0c8c}\x{0c8e}-\x{0c90}\x{0c92}-\x{0ca8}\x{0caa}-\x{0cb3}\x{0cb5}-\x{0cb9}\x{0cbd}\x{0cde}\x{0ce0}\x{0ce1}\x{0cf1}\x{0cf2}\x{0d05}-\x{0d0c}\x{0d0e}-\x{0d10}\x{0d12}-\x{0d3a}\x{0d3d}\x{0d4e}\x{0d60}\x{0d61}\x{0d7a}-\x{0d7f}\x{0d85}-\x{0d96}\x{0d9a}-\x{0db1}\x{0db3}-\x{0dbb}\x{0dbd}\x{0dc0}-\x{0dc6}\x{0e01}-\x{0e30}\x{0e32}\x{0e33}\x{0e40}-\x{0e46}\x{0e81}\x{0e82}\x{0e84}\x{0e87}\x{0e88}\x{0e8a}\x{0e8d}\x{0e94}-\x{0e97}\x{0e99}-\x{0e9f}\x{0ea1}-\x{0ea3}\x{0ea5}\x{0ea7}\x{0eaa}\x{0eab}\x{0ead}-\x{0eb0}\x{0eb2}\x{0eb3}\x{0ebd}\x{0ec0}-\x{0ec4}\x{0ec6}\x{0edc}-\x{0edf}\x{0f00}\x{0f40}-\x{0f47}\x{0f49}-\x{0f6c}\x{0f88}-\x{0f8c}\x{1000}-\x{102a}\x{103f}\x{1050}-\x{1055}\x{105a}-\x{105d}\x{1061}\x{1065}\x{1066}\x{106e}-\x{1070}\x{1075}-\x{1081}\x{108e}\x{10a0}-\x{10c5}\x{10c7}\x{10cd}\x{10d0}-\x{10fa}\x{10fc}-\x{1248}\x{124a}-\x{124d}\x{1250}-\x{1256}\x{1258}\x{125a}-\x{125d}\x{1260}-\x{1288}\x{128a}-\x{128d}\x{1290}-\x{12b0}\x{12b2}-\x{12b5}\x{12b8}-\x{12be}\x{12c0}\x{12c2}-\x{12c5}\x{12c8}-\x{12d6}\x{12d8}-\x{1310}\x{1312}-\x{1315}\x{1318}-\x{135a}\x{1380}-\x{138f}\x{13a0}-\x{13f4}\x{1401}-\x{166c}\x{166f}-\x{167f}\x{1681}-\x{169a}\x{16a0}-\x{16ea}\x{16ee}-\x{16f0}\x{1700}-\x{170c}\x{170e}-\x{1711}\x{1720}-\x{1731}\x{1740}-\x{1751}\x{1760}-\x{176c}\x{176e}-\x{1770}\x{1780}-\x{17b3}\x{17d7}\x{17dc}\x{1820}-\x{1877}\x{1880}-\x{18a8}\x{18aa}\x{18b0}-\x{18f5}\x{1900}-\x{191c}\x{1950}-\x{196d}\x{1970}-\x{1974}\x{1980}-\x{19ab}\x{19c1}-\x{19c7}\x{1a00}-\x{1a16}\x{1a20}-\x{1a54}\x{1aa7}\x{1b05}-\x{1b33}\x{1b45}-\x{1b4b}\x{1b83}-\x{1ba0}\x{1bae}\x{1baf}\x{1bba}-\x{1be5}\x{1c00}-\x{1c23}\x{1c4d}-\x{1c4f}\x{1c5a}-\x{1c7d}\x{1ce9}-\x{1cec}\x{1cee}-\x{1cf1}\x{1cf5}\x{1cf6}\x{1d00}-\x{1dbf}\x{1e00}-\x{1f15}\x{1f18}-\x{1f1d}\x{1f20}-\x{1f45}\x{1f48}-\x{1f4d}\x{1f50}-\x{1f57}\x{1f59}\x{1f5b}\x{1f5d}\x{1f5f}-\x{1f7d}\x{1f80}-\x{1fb4}\x{1fb6}-\x{1fbc}\x{1fbe}\x{1fc2}-\x{1fc4}\x{1fc6}-\x{1fcc}\x{1fd0}-\x{1fd3}\x{1fd6}-\x{1fdb}\x{1fe0}-\x{1fec}\x{1ff2}-\x{1ff4}\x{1ff6}-\x{1ffc}\x{2071}\x{207f}\x{2090}-\x{209c}\x{2102}\x{2107}\x{210a}-\x{2113}\x{2115}\x{2119}-\x{211d}\x{2124}\x{2126}\x{2128}\x{212a}-\x{212d}\x{212f}-\x{2139}\x{213c}-\x{213f}\x{2145}-\x{2149}\x{214e}\x{2160}-\x{2188}\x{2c00}-\x{2c2e}\x{2c30}-\x{2c5e}\x{2c60}-\x{2ce4}\x{2ceb}-\x{2cee}\x{2cf2}\x{2cf3}\x{2d00}-\x{2d25}\x{2d27}\x{2d2d}\x{2d30}-\x{2d67}\x{2d6f}\x{2d80}-\x{2d96}\x{2da0}-\x{2da6}\x{2da8}-\x{2dae}\x{2db0}-\x{2db6}\x{2db8}-\x{2dbe}\x{2dc0}-\x{2dc6}\x{2dc8}-\x{2dce}\x{2dd0}-\x{2dd6}\x{2dd8}-\x{2dde}\x{2e2f}\x{3005}-\x{3007}\x{3021}-\x{3029}\x{3031}-\x{3035}\x{3038}-\x{303c}\x{3041}-\x{3096}\x{309d}-\x{309f}\x{30a1}-\x{30fa}\x{30fc}-\x{30ff}\x{3105}-\x{312d}\x{3131}-\x{318e}\x{31a0}-\x{31ba}\x{31f0}-\x{31ff}\x{3400}-\x{4db5}\x{4e00}-\x{9fcc}\x{a000}-\x{a48c}\x{a4d0}-\x{a4fd}\x{a500}-\x{a60c}\x{a610}-\x{a61f}\x{a62a}\x{a62b}\x{a640}-\x{a66e}\x{a67f}-\x{a697}\x{a6a0}-\x{a6ef}\x{a717}-\x{a71f}\x{a722}-\x{a788}\x{a78b}-\x{a78e}\x{a790}-\x{a793}\x{a7a0}-\x{a7aa}\x{a7f8}-\x{a801}\x{a803}-\x{a805}\x{a807}-\x{a80a}\x{a80c}-\x{a822}\x{a840}-\x{a873}\x{a882}-\x{a8b3}\x{a8f2}-\x{a8f7}\x{a8fb}\x{a90a}-\x{a925}\x{a930}-\x{a946}\x{a960}-\x{a97c}\x{a984}-\x{a9b2}\x{a9cf}\x{aa00}-\x{aa28}\x{aa40}-\x{aa42}\x{aa44}-\x{aa4b}\x{aa60}-\x{aa76}\x{aa7a}\x{aa80}-\x{aaaf}\x{aab1}\x{aab5}\x{aab6}\x{aab9}-\x{aabd}\x{aac0}\x{aac2}\x{aadb}-\x{aadd}\x{aae0}-\x{aaea}\x{aaf2}-\x{aaf4}\x{ab01}-\x{ab06}\x{ab09}-\x{ab0e}\x{ab11}-\x{ab16}\x{ab20}-\x{ab26}\x{ab28}-\x{ab2e}\x{abc0}-\x{abe2}\x{ac00}-\x{d7a3}\x{d7b0}-\x{d7c6}\x{d7cb}-\x{d7fb}\x{f900}-\x{fa6d}\x{fa70}-\x{fad9}\x{fb00}-\x{fb06}\x{fb13}-\x{fb17}\x{fb1d}\x{fb1f}-\x{fb28}\x{fb2a}-\x{fb36}\x{fb38}-\x{fb3c}\x{fb3e}\x{fb40}\x{fb41}\x{fb43}\x{fb44}\x{fb46}-\x{fbb1}\x{fbd3}-\x{fd3d}\x{fd50}-\x{fd8f}\x{fd92}-\x{fdc7}\x{fdf0}-\x{fdfb}\x{fe70}-\x{fe74}\x{fe76}-\x{fefc}\x{ff21}-\x{ff3a}\x{ff41}-\x{ff5a}\x{ff66}-\x{ffbe}\x{ffc2}-\x{ffc7}\x{ffca}-\x{ffcf}\x{ffd2}-\x{ffd7}\x{ffda}-\x{ffdc}0-9\x{0300}-\x{036f}\x{0483}-\x{0487}\x{0591}-\x{05bd}\x{05bf}\x{05c1}\x{05c2}\x{05c4}\x{05c5}\x{05c7}\x{0610}-\x{061a}\x{064b}-\x{0669}\x{0670}\x{06d6}-\x{06dc}\x{06df}-\x{06e4}\x{06e7}\x{06e8}\x{06ea}-\x{06ed}\x{06f0}-\x{06f9}\x{0711}\x{0730}-\x{074a}\x{07a6}-\x{07b0}\x{07c0}-\x{07c9}\x{07eb}-\x{07f3}\x{0816}-\x{0819}\x{081b}-\x{0823}\x{0825}-\x{0827}\x{0829}-\x{082d}\x{0859}-\x{085b}\x{08e4}-\x{08fe}\x{0900}-\x{0903}\x{093a}-\x{093c}\x{093e}-\x{094f}\x{0951}-\x{0957}\x{0962}\x{0963}\x{0966}-\x{096f}\x{0981}-\x{0983}\x{09bc}\x{09be}-\x{09c4}\x{09c7}\x{09c8}\x{09cb}-\x{09cd}\x{09d7}\x{09e2}\x{09e3}\x{09e6}-\x{09ef}\x{0a01}-\x{0a03}\x{0a3c}\x{0a3e}-\x{0a42}\x{0a47}\x{0a48}\x{0a4b}-\x{0a4d}\x{0a51}\x{0a66}-\x{0a71}\x{0a75}\x{0a81}-\x{0a83}\x{0abc}\x{0abe}-\x{0ac5}\x{0ac7}-\x{0ac9}\x{0acb}-\x{0acd}\x{0ae2}\x{0ae3}\x{0ae6}-\x{0aef}\x{0b01}-\x{0b03}\x{0b3c}\x{0b3e}-\x{0b44}\x{0b47}\x{0b48}\x{0b4b}-\x{0b4d}\x{0b56}\x{0b57}\x{0b62}\x{0b63}\x{0b66}-\x{0b6f}\x{0b82}\x{0bbe}-\x{0bc2}\x{0bc6}-\x{0bc8}\x{0bca}-\x{0bcd}\x{0bd7}\x{0be6}-\x{0bef}\x{0c01}-\x{0c03}\x{0c3e}-\x{0c44}\x{0c46}-\x{0c48}\x{0c4a}-\x{0c4d}\x{0c55}\x{0c56}\x{0c62}\x{0c63}\x{0c66}-\x{0c6f}\x{0c82}\x{0c83}\x{0cbc}\x{0cbe}-\x{0cc4}\x{0cc6}-\x{0cc8}\x{0cca}-\x{0ccd}\x{0cd5}\x{0cd6}\x{0ce2}\x{0ce3}\x{0ce6}-\x{0cef}\x{0d02}\x{0d03}\x{0d3e}-\x{0d44}\x{0d46}-\x{0d48}\x{0d4a}-\x{0d4d}\x{0d57}\x{0d62}\x{0d63}\x{0d66}-\x{0d6f}\x{0d82}\x{0d83}\x{0dca}\x{0dcf}-\x{0dd4}\x{0dd6}\x{0dd8}-\x{0ddf}\x{0df2}\x{0df3}\x{0e31}\x{0e34}-\x{0e3a}\x{0e47}-\x{0e4e}\x{0e50}-\x{0e59}\x{0eb1}\x{0eb4}-\x{0eb9}\x{0ebb}\x{0ebc}\x{0ec8}-\x{0ecd}\x{0ed0}-\x{0ed9}\x{0f18}\x{0f19}\x{0f20}-\x{0f29}\x{0f35}\x{0f37}\x{0f39}\x{0f3e}\x{0f3f}\x{0f71}-\x{0f84}\x{0f86}\x{0f87}\x{0f8d}-\x{0f97}\x{0f99}-\x{0fbc}\x{0fc6}\x{102b}-\x{103e}\x{1040}-\x{1049}\x{1056}-\x{1059}\x{105e}-\x{1060}\x{1062}-\x{1064}\x{1067}-\x{106d}\x{1071}-\x{1074}\x{1082}-\x{108d}\x{108f}-\x{109d}\x{135d}-\x{135f}\x{1712}-\x{1714}\x{1732}-\x{1734}\x{1752}\x{1753}\x{1772}\x{1773}\x{17b4}-\x{17d3}\x{17dd}\x{17e0}-\x{17e9}\x{180b}-\x{180d}\x{1810}-\x{1819}\x{18a9}\x{1920}-\x{192b}\x{1930}-\x{193b}\x{1946}-\x{194f}\x{19b0}-\x{19c0}\x{19c8}\x{19c9}\x{19d0}-\x{19d9}\x{1a17}-\x{1a1b}\x{1a55}-\x{1a5e}\x{1a60}-\x{1a7c}\x{1a7f}-\x{1a89}\x{1a90}-\x{1a99}\x{1b00}-\x{1b04}\x{1b34}-\x{1b44}\x{1b50}-\x{1b59}\x{1b6b}-\x{1b73}\x{1b80}-\x{1b82}\x{1ba1}-\x{1bad}\x{1bb0}-\x{1bb9}\x{1be6}-\x{1bf3}\x{1c24}-\x{1c37}\x{1c40}-\x{1c49}\x{1c50}-\x{1c59}\x{1cd0}-\x{1cd2}\x{1cd4}-\x{1ce8}\x{1ced}\x{1cf2}-\x{1cf4}\x{1dc0}-\x{1de6}\x{1dfc}-\x{1dff}\x{200c}\x{200d}\x{203f}\x{2040}\x{2054}\x{20d0}-\x{20dc}\x{20e1}\x{20e5}-\x{20f0}\x{2cef}-\x{2cf1}\x{2d7f}\x{2de0}-\x{2dff}\x{302a}-\x{302f}\x{3099}\x{309a}\x{a620}-\x{a629}\x{a66f}\x{a674}-\x{a67d}\x{a69f}\x{a6f0}\x{a6f1}\x{a802}\x{a806}\x{a80b}\x{a823}-\x{a827}\x{a880}\x{a881}\x{a8b4}-\x{a8c4}\x{a8d0}-\x{a8d9}\x{a8e0}-\x{a8f1}\x{a900}-\x{a909}\x{a926}-\x{a92d}\x{a947}-\x{a953}\x{a980}-\x{a983}\x{a9b3}-\x{a9c0}\x{a9d0}-\x{a9d9}\x{aa29}-\x{aa36}\x{aa43}\x{aa4c}\x{aa4d}\x{aa50}-\x{aa59}\x{aa7b}\x{aab0}\x{aab2}-\x{aab4}\x{aab7}\x{aab8}\x{aabe}\x{aabf}\x{aac1}\x{aaeb}-\x{aaef}\x{aaf5}\x{aaf6}\x{abe3}-\x{abea}\x{abec}\x{abed}\x{abf0}-\x{abf9}\x{fb1e}\x{fe00}-\x{fe0f}\x{fe20}-\x{fe26}\x{fe33}\x{fe34}\x{fe4d}-\x{fe4f}\x{ff10}-\x{ff19}\x{ff3f}]*\b'; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* Full list of JavaScript reserved words. |
|
38
|
|
|
* Will be loaded from /data/js/keywords_reserved.txt. |
|
39
|
|
|
* |
|
40
|
|
|
* @see https://mathiasbynens.be/notes/reserved-keywords |
|
41
|
|
|
* |
|
42
|
|
|
* @var string[] |
|
43
|
|
|
*/ |
|
44
|
|
|
protected $keywordsReserved = array(); |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* List of JavaScript reserved words that accept a <variable, value, ...> |
|
48
|
|
|
* after them. Some end of lines are not the end of a statement, like with |
|
49
|
|
|
* these keywords. |
|
50
|
|
|
* |
|
51
|
|
|
* E.g.: we shouldn't insert a ; after this else |
|
52
|
|
|
* else |
|
53
|
|
|
* console.log('this is quite fine') |
|
54
|
|
|
* |
|
55
|
|
|
* Will be loaded from /data/js/keywords_before.txt |
|
56
|
|
|
* |
|
57
|
|
|
* @var string[] |
|
58
|
|
|
*/ |
|
59
|
|
|
protected $keywordsBefore = array(); |
|
60
|
|
|
|
|
61
|
|
|
/** |
|
62
|
|
|
* List of JavaScript reserved words that accept a <variable, value, ...> |
|
63
|
|
|
* before them. Some end of lines are not the end of a statement, like when |
|
64
|
|
|
* continued by one of these keywords on the newline. |
|
65
|
|
|
* |
|
66
|
|
|
* E.g.: we shouldn't insert a ; before this instanceof |
|
67
|
|
|
* variable |
|
68
|
|
|
* instanceof String |
|
69
|
|
|
* |
|
70
|
|
|
* Will be loaded from /data/js/keywords_after.txt |
|
71
|
|
|
* |
|
72
|
|
|
* @var string[] |
|
73
|
|
|
*/ |
|
74
|
|
|
protected $keywordsAfter = array(); |
|
75
|
|
|
|
|
76
|
|
|
/** |
|
77
|
|
|
* List of all JavaScript operators. |
|
78
|
|
|
* |
|
79
|
|
|
* Will be loaded from /data/js/operators.txt |
|
80
|
|
|
* |
|
81
|
|
|
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators |
|
82
|
|
|
* |
|
83
|
|
|
* @var string[] |
|
84
|
|
|
*/ |
|
85
|
|
|
protected $operators = array(); |
|
86
|
|
|
|
|
87
|
|
|
/** |
|
88
|
|
|
* List of JavaScript operators that accept a <variable, value, ...> after |
|
89
|
|
|
* them. Some end of lines are not the end of a statement, like with these |
|
90
|
|
|
* operators. |
|
91
|
|
|
* |
|
92
|
|
|
* Note: Most operators are fine, we've only removed ++ and --. |
|
93
|
|
|
* ++ & -- have to be joined with the value they're in-/decrementing. |
|
94
|
|
|
* |
|
95
|
|
|
* Will be loaded from /data/js/operators_before.txt |
|
96
|
|
|
* |
|
97
|
|
|
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators |
|
98
|
|
|
* |
|
99
|
|
|
* @var string[] |
|
100
|
|
|
*/ |
|
101
|
|
|
protected $operatorsBefore = array(); |
|
102
|
|
|
|
|
103
|
|
|
/** |
|
104
|
|
|
* List of JavaScript operators that accept a <variable, value, ...> before |
|
105
|
|
|
* them. Some end of lines are not the end of a statement, like when |
|
106
|
|
|
* continued by one of these operators on the newline. |
|
107
|
|
|
* |
|
108
|
|
|
* Note: Most operators are fine, we've only removed ), ], ++, --, ! and ~. |
|
109
|
|
|
* There can't be a newline separating ! or ~ and whatever it is negating. |
|
110
|
|
|
* ++ & -- have to be joined with the value they're in-/decrementing. |
|
111
|
|
|
* ) & ] are "special" in that they have lots or usecases. () for example |
|
112
|
|
|
* is used for function calls, for grouping, in if () and for (), ... |
|
113
|
|
|
* |
|
114
|
|
|
* Will be loaded from /data/js/operators_after.txt |
|
115
|
|
|
* |
|
116
|
|
|
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators |
|
117
|
|
|
* |
|
118
|
|
|
* @var string[] |
|
119
|
|
|
*/ |
|
120
|
|
|
protected $operatorsAfter = array(); |
|
121
|
|
|
|
|
122
|
|
|
/** |
|
123
|
|
|
* @var array |
|
124
|
|
|
*/ |
|
125
|
|
|
protected $nestedExtracted = array(); |
|
126
|
|
|
|
|
127
|
|
|
/** |
|
128
|
|
|
* {@inheritdoc} |
|
129
|
|
|
*/ |
|
130
|
|
|
public function __construct() |
|
131
|
|
|
{ |
|
132
|
|
|
call_user_func_array(array('parent', '__construct'), func_get_args()); |
|
133
|
|
|
|
|
134
|
|
|
$dataDir = __DIR__.'/../data/js/'; |
|
135
|
|
|
$options = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES; |
|
136
|
|
|
$this->keywordsReserved = file($dataDir.'keywords_reserved.txt', $options); |
|
137
|
|
|
$this->keywordsBefore = file($dataDir.'keywords_before.txt', $options); |
|
138
|
|
|
$this->keywordsAfter = file($dataDir.'keywords_after.txt', $options); |
|
139
|
|
|
$this->operators = file($dataDir.'operators.txt', $options); |
|
140
|
|
|
$this->operatorsBefore = file($dataDir.'operators_before.txt', $options); |
|
141
|
|
|
$this->operatorsAfter = file($dataDir.'operators_after.txt', $options); |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* Minify the data. |
|
146
|
|
|
* Perform JS optimizations. |
|
147
|
|
|
* |
|
148
|
|
|
* @param string[optional] $path Path to write the data to |
|
149
|
|
|
* |
|
150
|
|
|
* @return string The minified data |
|
151
|
|
|
*/ |
|
152
|
|
|
public function execute($path = null) |
|
153
|
|
|
{ |
|
154
|
|
|
$content = ''; |
|
155
|
|
|
|
|
156
|
|
|
// loop files |
|
157
|
|
|
foreach ($this->data as $source => $js) { |
|
158
|
|
|
/* |
|
159
|
|
|
* Combine js: separating the scripts by a ; |
|
160
|
|
|
* I'm also adding a newline: it will be eaten when whitespace is |
|
161
|
|
|
* stripped, but we need to make sure we're not just appending |
|
162
|
|
|
* a new script right after a previous script that ended with a |
|
163
|
|
|
* singe-line comment on the last line (in which case it would also |
|
164
|
|
|
* be seen as part of that comment) |
|
165
|
|
|
*/ |
|
166
|
|
|
$content .= $js."\n;"; |
|
167
|
|
|
} |
|
168
|
|
|
|
|
169
|
|
|
/* |
|
170
|
|
|
* Let's first take out strings, comments and regular expressions. |
|
171
|
|
|
* All of these can contain JS code-like characters, and we should make |
|
172
|
|
|
* sure any further magic ignores anything inside of these. |
|
173
|
|
|
* |
|
174
|
|
|
* Consider this example, where we should not strip any whitespace: |
|
175
|
|
|
* var str = "a test"; |
|
176
|
|
|
* |
|
177
|
|
|
* Comments will be removed altogether, strings and regular expressions |
|
178
|
|
|
* will be replaced by placeholder text, which we'll restore later. |
|
179
|
|
|
*/ |
|
180
|
|
|
$this->extractStrings('\'"`'); |
|
181
|
|
|
$this->stripComments(); |
|
182
|
|
|
$this->extractRegex(); |
|
183
|
|
|
$content = $this->replace($content); |
|
184
|
|
|
|
|
185
|
|
|
$content = $this->propertyNotation($content); |
|
186
|
|
|
$content = $this->shortenBools($content); |
|
187
|
|
|
$content = $this->stripWhitespace($content); |
|
188
|
|
|
|
|
189
|
|
|
/* |
|
190
|
|
|
* Earlier, we extracted strings & regular expressions and replaced them |
|
191
|
|
|
* with placeholder text. This will restore them. |
|
192
|
|
|
*/ |
|
193
|
|
|
$content = $this->restoreExtractedData($content); |
|
194
|
|
|
|
|
195
|
|
|
return $content; |
|
196
|
|
|
} |
|
197
|
|
|
|
|
198
|
|
|
/** |
|
199
|
|
|
* Strip comments from source code. |
|
200
|
|
|
* |
|
201
|
|
|
* Public method so it can be accessed from inside the closure in |
|
202
|
|
|
* extractRegex. Once PHP5.3 compatibility is dropped, we can make this |
|
203
|
|
|
* method protected again. |
|
204
|
|
|
*/ |
|
205
|
|
|
public function stripComments() |
|
206
|
|
|
{ |
|
207
|
|
|
// single-line comments |
|
208
|
|
|
$this->registerPattern('/\/\/.*$/m', ''); |
|
209
|
|
|
|
|
210
|
|
|
// multi-line comments |
|
211
|
|
|
$this->registerPattern('/\/\*.*?\*\//s', ''); |
|
212
|
|
|
} |
|
213
|
|
|
|
|
214
|
|
|
/** |
|
215
|
|
|
* JS can have /-delimited regular expressions, like: /ab+c/.match(string). |
|
216
|
|
|
* |
|
217
|
|
|
* The content inside the regex can contain characters that may be confused |
|
218
|
|
|
* for JS code: e.g. it could contain whitespace it needs to match & we |
|
219
|
|
|
* don't want to strip whitespace in there. |
|
220
|
|
|
* |
|
221
|
|
|
* The regex can be pretty simple: we don't have to care about comments, |
|
222
|
|
|
* (which also use slashes) because stripComments() will have stripped those |
|
223
|
|
|
* already. |
|
224
|
|
|
* |
|
225
|
|
|
* This method will replace all string content with simple REGEX# |
|
226
|
|
|
* placeholder text, so we've rid all regular expressions from characters |
|
227
|
|
|
* that may be misinterpreted. Original regex content will be saved in |
|
228
|
|
|
* $this->extracted and after doing all other minifying, we can restore the |
|
229
|
|
|
* original content via restoreRegex() |
|
230
|
|
|
*/ |
|
231
|
|
|
protected function extractRegex() |
|
232
|
|
|
{ |
|
233
|
|
|
// PHP only supports $this inside anonymous functions since 5.4 |
|
234
|
|
|
$minifier = $this; |
|
235
|
|
|
$callback = function ($match) use ($minifier) { |
|
236
|
|
|
$count = count($minifier->extracted); |
|
237
|
|
|
$placeholder = '"'.$count.'"'; |
|
238
|
|
|
$minifier->extracted[$placeholder] = $match['regex']; |
|
239
|
|
|
|
|
240
|
|
|
// because we're also trying to find regular expressions that follow |
|
241
|
|
|
// if/when/for statements, we should also make sure that the content |
|
242
|
|
|
// within these statements is also minified... |
|
243
|
|
|
// e.g. `if("some string"/* or comment */)` should become |
|
244
|
|
|
// `if("some string")` |
|
245
|
|
|
if (isset($match['before'])) { |
|
246
|
|
|
$other = new $minifier(); |
|
247
|
|
|
$other->extractStrings('\'"`', "$count-"); |
|
248
|
|
|
$other->stripComments(); |
|
249
|
|
|
$match['before'] = $other->replace($match['before']); |
|
250
|
|
|
$this->nestedExtracted += $other->extracted; |
|
251
|
|
|
} |
|
252
|
|
|
|
|
253
|
|
|
return (isset($match['before']) ? $match['before'] : ''). |
|
254
|
|
|
$placeholder. |
|
255
|
|
|
(isset($match['after']) ? $match['after'] : ''); |
|
256
|
|
|
}; |
|
257
|
|
|
|
|
258
|
|
|
$pattern = '(?P<regex>\/(?!\/).*?(?<!\\\\)(\\\\\\\\)*\/[gimy]*)(?![0-9a-zA-Z\/])'; |
|
259
|
|
|
|
|
260
|
|
|
// a regular expression can only be followed by a few operators or some |
|
261
|
|
|
// of the RegExp methods (a `\` followed by a variable or value is |
|
262
|
|
|
// likely part of a division, not a regex) |
|
263
|
|
|
$keywords = array('do', 'in', 'new', 'else', 'throw', 'yield', 'delete', 'return', 'typeof'); |
|
264
|
|
|
$before = '(?P<before>[=:,;\}\(\{\[&\|!]|^|'.implode('|', $keywords).')'; |
|
265
|
|
|
$propertiesAndMethods = array( |
|
266
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#Properties_2 |
|
267
|
|
|
'constructor', |
|
268
|
|
|
'flags', |
|
269
|
|
|
'global', |
|
270
|
|
|
'ignoreCase', |
|
271
|
|
|
'multiline', |
|
272
|
|
|
'source', |
|
273
|
|
|
'sticky', |
|
274
|
|
|
'unicode', |
|
275
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#Methods_2 |
|
276
|
|
|
'compile(', |
|
277
|
|
|
'exec(', |
|
278
|
|
|
'test(', |
|
279
|
|
|
'toSource(', |
|
280
|
|
|
'toString(', |
|
281
|
|
|
); |
|
282
|
|
|
$delimiters = array_fill(0, count($propertiesAndMethods), '/'); |
|
283
|
|
|
$propertiesAndMethods = array_map('preg_quote', $propertiesAndMethods, $delimiters); |
|
284
|
|
|
$after = '(?P<after>[\.,;\)\}&\|+]|$|\.('.implode('|', $propertiesAndMethods).'))'; |
|
285
|
|
|
$this->registerPattern('/'.$before.'\s*'.$pattern.'\s*'.$after.'/', $callback); |
|
286
|
|
|
|
|
287
|
|
|
// we didn't check for regular expressions after `)`, because that is |
|
288
|
|
|
// more often than not not a character where a regex can follow (e.g. |
|
289
|
|
|
// (1+2)/3/4 -> /3/ could be considered a regex, but it's not) |
|
290
|
|
|
// however, after single-line if/while/for, there could very well be a |
|
291
|
|
|
// regex after `)` (e.g. if(true)/regex/) |
|
292
|
|
|
// there is one problem, though: it's (near) impossible to check for |
|
293
|
|
|
// when the if/while/for statement is closed (same amount of closing |
|
294
|
|
|
// brackets as there were opened), so I'll ignore single-line statements |
|
295
|
|
|
// with nested brackets followed by a regex for now... |
|
296
|
|
|
$before = '(?P<before>\b(if|while|for)\s*\((?P<code>[^\(]+?)\))'; |
|
297
|
|
|
$this->registerPattern('/'.$before.'\s*'.$pattern.'\s*'.$after.'/', $callback); |
|
298
|
|
|
|
|
299
|
|
|
// 1 more edge case: a regex can be followed by a lot more operators or |
|
300
|
|
|
// keywords if there's a newline (ASI) in between, where the operator |
|
301
|
|
|
// actually starts a new statement |
|
302
|
|
|
// (https://github.com/matthiasmullie/minify/issues/56) |
|
303
|
|
|
$operators = $this->getOperatorsForRegex($this->operatorsBefore, '/'); |
|
304
|
|
|
$operators += $this->getOperatorsForRegex($this->keywordsReserved, '/'); |
|
305
|
|
|
$after = '(?P<after>\n\s*('.implode('|', $operators).'))'; |
|
306
|
|
|
$this->registerPattern('/'.$pattern.'\s*'.$after.'/', $callback); |
|
307
|
|
|
} |
|
308
|
|
|
|
|
309
|
|
|
/** |
|
310
|
|
|
* In addition to the regular restore routine, we also need to restore a few |
|
311
|
|
|
* more things that have been extracted as part of the regex extraction... |
|
312
|
|
|
* |
|
313
|
|
|
* {@inheritdoc} |
|
314
|
|
|
*/ |
|
315
|
|
|
protected function restoreExtractedData($content) |
|
316
|
|
|
{ |
|
317
|
|
|
// restore regular extracted stuff |
|
318
|
|
|
$content = parent::restoreExtractedData($content); |
|
319
|
|
|
|
|
320
|
|
|
// restore nested stuff from within regex extraction |
|
321
|
|
|
$content = strtr($content, $this->nestedExtracted); |
|
322
|
|
|
|
|
323
|
|
|
return $content; |
|
324
|
|
|
} |
|
325
|
|
|
|
|
326
|
|
|
/** |
|
327
|
|
|
* Strip whitespace. |
|
328
|
|
|
* |
|
329
|
|
|
* We won't strip *all* whitespace, but as much as possible. The thing that |
|
330
|
|
|
* we'll preserve are newlines we're unsure about. |
|
331
|
|
|
* JavaScript doesn't require statements to be terminated with a semicolon. |
|
332
|
|
|
* It will automatically fix missing semicolons with ASI (automatic semi- |
|
333
|
|
|
* colon insertion) at the end of line causing errors (without semicolon.) |
|
334
|
|
|
* |
|
335
|
|
|
* Because it's sometimes hard to tell if a newline is part of a statement |
|
336
|
|
|
* that should be terminated or not, we'll just leave some of them alone. |
|
337
|
|
|
* |
|
338
|
|
|
* @param string $content The content to strip the whitespace for |
|
339
|
|
|
* |
|
340
|
|
|
* @return string |
|
341
|
|
|
*/ |
|
342
|
|
|
protected function stripWhitespace($content) |
|
343
|
|
|
{ |
|
344
|
|
|
// uniform line endings, make them all line feed |
|
345
|
|
|
$content = str_replace(array("\r\n", "\r"), "\n", $content); |
|
346
|
|
|
|
|
347
|
|
|
// collapse all non-line feed whitespace into a single space |
|
348
|
|
|
$content = preg_replace('/[^\S\n]+/', ' ', $content); |
|
349
|
|
|
|
|
350
|
|
|
// strip leading & trailing whitespace |
|
351
|
|
|
$content = str_replace(array(" \n", "\n "), "\n", $content); |
|
352
|
|
|
|
|
353
|
|
|
// collapse consecutive line feeds into just 1 |
|
354
|
|
|
$content = preg_replace('/\n+/', "\n", $content); |
|
355
|
|
|
|
|
356
|
|
|
$operatorsBefore = $this->getOperatorsForRegex($this->operatorsBefore, '/'); |
|
357
|
|
|
$operatorsAfter = $this->getOperatorsForRegex($this->operatorsAfter, '/'); |
|
358
|
|
|
$operators = $this->getOperatorsForRegex($this->operators, '/'); |
|
359
|
|
|
$keywordsBefore = $this->getKeywordsForRegex($this->keywordsBefore, '/'); |
|
360
|
|
|
$keywordsAfter = $this->getKeywordsForRegex($this->keywordsAfter, '/'); |
|
361
|
|
|
|
|
362
|
|
|
// strip whitespace that ends in (or next line begin with) an operator |
|
363
|
|
|
// that allows statements to be broken up over multiple lines |
|
364
|
|
|
unset($operatorsBefore['+'], $operatorsBefore['-'], $operatorsAfter['+'], $operatorsAfter['-']); |
|
365
|
|
|
$content = preg_replace( |
|
366
|
|
|
array( |
|
367
|
|
|
'/('.implode('|', $operatorsBefore).')\s+/', |
|
368
|
|
|
'/\s+('.implode('|', $operatorsAfter).')/', |
|
369
|
|
|
), '\\1', $content |
|
370
|
|
|
); |
|
371
|
|
|
|
|
372
|
|
|
// make sure + and - can't be mistaken for, or joined into ++ and -- |
|
373
|
|
|
$content = preg_replace( |
|
374
|
|
|
array( |
|
375
|
|
|
'/(?<![\+\-])\s*([\+\-])(?![\+\-])/', |
|
376
|
|
|
'/(?<![\+\-])([\+\-])\s*(?![\+\-])/', |
|
377
|
|
|
), '\\1', $content |
|
378
|
|
|
); |
|
379
|
|
|
|
|
380
|
|
|
// collapse whitespace around reserved words into single space |
|
381
|
|
|
$content = preg_replace('/(^|[;\}\s])\K('.implode('|', $keywordsBefore).')\s+/', '\\2 ', $content); |
|
382
|
|
|
$content = preg_replace('/\s+('.implode('|', $keywordsAfter).')(?=([;\{\s]|$))/', ' \\1', $content); |
|
383
|
|
|
|
|
384
|
|
|
/* |
|
385
|
|
|
* We didn't strip whitespace after a couple of operators because they |
|
386
|
|
|
* could be used in different contexts and we can't be sure it's ok to |
|
387
|
|
|
* strip the newlines. However, we can safely strip any non-line feed |
|
388
|
|
|
* whitespace that follows them. |
|
389
|
|
|
*/ |
|
390
|
|
|
$operatorsDiffBefore = array_diff($operators, $operatorsBefore); |
|
391
|
|
|
$operatorsDiffAfter = array_diff($operators, $operatorsAfter); |
|
392
|
|
|
$content = preg_replace('/('.implode('|', $operatorsDiffBefore).')[^\S\n]+/', '\\1', $content); |
|
393
|
|
|
$content = preg_replace('/[^\S\n]+('.implode('|', $operatorsDiffAfter).')/', '\\1', $content); |
|
394
|
|
|
|
|
395
|
|
|
/* |
|
396
|
|
|
* Get rid of double semicolons, except where they can be used like: |
|
397
|
|
|
* "for(v=1,_=b;;)", "for(v=1;;v++)" or "for(;;ja||(ja=true))". |
|
398
|
|
|
* I'll safeguard these double semicolons inside for-loops by |
|
399
|
|
|
* temporarily replacing them with an invalid condition: they won't have |
|
400
|
|
|
* a double semicolon and will be easy to spot to restore afterwards. |
|
401
|
|
|
*/ |
|
402
|
|
|
$content = preg_replace('/\bfor\(([^;]*);;([^;]*)\)/', 'for(\\1;-;\\2)', $content); |
|
403
|
|
|
$content = preg_replace('/;+/', ';', $content); |
|
404
|
|
|
$content = preg_replace('/\bfor\(([^;]*);-;([^;]*)\)/', 'for(\\1;;\\2)', $content); |
|
405
|
|
|
|
|
406
|
|
|
/* |
|
407
|
|
|
* Next, we'll be removing all semicolons where ASI kicks in. |
|
408
|
|
|
* for-loops however, can have an empty body (ending in only a |
|
409
|
|
|
* semicolon), like: `for(i=1;i<3;i++);`, of `for(i in list);` |
|
410
|
|
|
* Here, nothing happens during the loop; it's just used to keep |
|
411
|
|
|
* increasing `i`. With that ; omitted, the next line would be expected |
|
412
|
|
|
* to be the for-loop's body... |
|
413
|
|
|
* I'm going to double that semicolon (if any) so after the next line, |
|
414
|
|
|
* which strips semicolons here & there, we're still left with this one. |
|
415
|
|
|
*/ |
|
416
|
|
|
$content = preg_replace('/(for\([^;\{]*;[^;\{]*;[^;\{]*\));(\}|$)/s', '\\1;;\\2', $content); |
|
417
|
|
|
$content = preg_replace('/(for\([^;\{]+\s+in\s+[^;\{]+\));(\}|$)/s', '\\1;;\\2', $content); |
|
418
|
|
|
|
|
419
|
|
|
/* |
|
420
|
|
|
* We also can't strip empty else-statements. Even though they're |
|
421
|
|
|
* useless and probably shouldn't be in the code in the first place, we |
|
422
|
|
|
* shouldn't be stripping the `;` that follows it as it breaks the code. |
|
423
|
|
|
* We can just remove those useless else-statements completely. |
|
424
|
|
|
* |
|
425
|
|
|
* @see https://github.com/matthiasmullie/minify/issues/91 |
|
426
|
|
|
*/ |
|
427
|
|
|
$content = preg_replace('/else;/s', '', $content); |
|
428
|
|
|
|
|
429
|
|
|
/* |
|
430
|
|
|
* We also don't really want to terminate statements followed by closing |
|
431
|
|
|
* curly braces (which we've ignored completely up until now) or end-of- |
|
432
|
|
|
* script: ASI will kick in here & we're all about minifying. |
|
433
|
|
|
* Semicolons at beginning of the file don't make any sense either. |
|
434
|
|
|
*/ |
|
435
|
|
|
$content = preg_replace('/;(\}|$)/s', '\\1', $content); |
|
436
|
|
|
$content = ltrim($content, ';'); |
|
437
|
|
|
|
|
438
|
|
|
// get rid of remaining whitespace af beginning/end |
|
439
|
|
|
return trim($content); |
|
440
|
|
|
} |
|
441
|
|
|
|
|
442
|
|
|
/** |
|
443
|
|
|
* We'll strip whitespace around certain operators with regular expressions. |
|
444
|
|
|
* This will prepare the given array by escaping all characters. |
|
445
|
|
|
* |
|
446
|
|
|
* @param string[] $operators |
|
447
|
|
|
* @param string $delimiter |
|
448
|
|
|
* |
|
449
|
|
|
* @return string[] |
|
450
|
|
|
*/ |
|
451
|
|
|
protected function getOperatorsForRegex(array $operators, $delimiter = '/') |
|
452
|
|
|
{ |
|
453
|
|
|
// escape operators for use in regex |
|
454
|
|
|
$delimiters = array_fill(0, count($operators), $delimiter); |
|
455
|
|
|
$escaped = array_map('preg_quote', $operators, $delimiters); |
|
456
|
|
|
|
|
457
|
|
|
$operators = array_combine($operators, $escaped); |
|
458
|
|
|
|
|
459
|
|
|
// ignore + & - for now, they'll get special treatment |
|
460
|
|
|
unset($operators['+'], $operators['-']); |
|
461
|
|
|
|
|
462
|
|
|
// dot can not just immediately follow a number; it can be confused for |
|
463
|
|
|
// decimal point, or calling a method on it, e.g. 42 .toString() |
|
464
|
|
|
$operators['.'] = '(?<![0-9]\s)\.'; |
|
465
|
|
|
|
|
466
|
|
|
// don't confuse = with other assignment shortcuts (e.g. +=) |
|
467
|
|
|
$chars = preg_quote('+-*\=<>%&|', $delimiter); |
|
468
|
|
|
$operators['='] = '(?<!['.$chars.'])\='; |
|
469
|
|
|
|
|
470
|
|
|
return $operators; |
|
471
|
|
|
} |
|
472
|
|
|
|
|
473
|
|
|
/** |
|
474
|
|
|
* We'll strip whitespace around certain keywords with regular expressions. |
|
475
|
|
|
* This will prepare the given array by escaping all characters. |
|
476
|
|
|
* |
|
477
|
|
|
* @param string[] $keywords |
|
478
|
|
|
* @param string $delimiter |
|
479
|
|
|
* |
|
480
|
|
|
* @return string[] |
|
481
|
|
|
*/ |
|
482
|
|
|
protected function getKeywordsForRegex(array $keywords, $delimiter = '/') |
|
483
|
|
|
{ |
|
484
|
|
|
// escape keywords for use in regex |
|
485
|
|
|
$delimiter = array_fill(0, count($keywords), $delimiter); |
|
486
|
|
|
$escaped = array_map('preg_quote', $keywords, $delimiter); |
|
487
|
|
|
|
|
488
|
|
|
// add word boundaries |
|
489
|
|
|
array_walk($keywords, function ($value) { |
|
490
|
|
|
return '\b'.$value.'\b'; |
|
491
|
|
|
}); |
|
492
|
|
|
|
|
493
|
|
|
$keywords = array_combine($keywords, $escaped); |
|
494
|
|
|
|
|
495
|
|
|
return $keywords; |
|
496
|
|
|
} |
|
497
|
|
|
|
|
498
|
|
|
/** |
|
499
|
|
|
* Replaces all occurrences of array['key'] by array.key. |
|
500
|
|
|
* |
|
501
|
|
|
* @param string $content |
|
502
|
|
|
* |
|
503
|
|
|
* @return string |
|
504
|
|
|
*/ |
|
505
|
|
|
protected function propertyNotation($content) |
|
506
|
|
|
{ |
|
507
|
|
|
// PHP only supports $this inside anonymous functions since 5.4 |
|
508
|
|
|
$minifier = $this; |
|
509
|
|
|
$keywords = $this->keywordsReserved; |
|
510
|
|
|
$callback = function ($match) use ($minifier, $keywords) { |
|
511
|
|
|
$property = trim($minifier->extracted[$match[1]], '\'"'); |
|
512
|
|
|
|
|
513
|
|
|
/* |
|
514
|
|
|
* Check if the property is a reserved keyword. In this context (as |
|
515
|
|
|
* property of an object literal/array) it shouldn't matter, but IE8 |
|
516
|
|
|
* freaks out with "Expected identifier". |
|
517
|
|
|
*/ |
|
518
|
|
|
if (in_array($property, $keywords)) { |
|
519
|
|
|
return $match[0]; |
|
520
|
|
|
} |
|
521
|
|
|
|
|
522
|
|
|
/* |
|
523
|
|
|
* See if the property is in a variable-like format (e.g. |
|
524
|
|
|
* array['key-here'] can't be replaced by array.key-here since '-' |
|
525
|
|
|
* is not a valid character there. |
|
526
|
|
|
*/ |
|
527
|
|
|
if (!preg_match('/^'.$minifier::REGEX_VARIABLE.'$/u', $property)) { |
|
528
|
|
|
return $match[0]; |
|
529
|
|
|
} |
|
530
|
|
|
|
|
531
|
|
|
return '.'.$property; |
|
532
|
|
|
}; |
|
533
|
|
|
|
|
534
|
|
|
/* |
|
535
|
|
|
* Figure out if previous character is a variable name (of the array |
|
536
|
|
|
* we want to use property notation on) - this is to make sure |
|
537
|
|
|
* standalone ['value'] arrays aren't confused for keys-of-an-array. |
|
538
|
|
|
* We can (and only have to) check the last character, because PHP's |
|
539
|
|
|
* regex implementation doesn't allow unfixed-length look-behind |
|
540
|
|
|
* assertions. |
|
541
|
|
|
*/ |
|
542
|
|
|
preg_match('/(\[[^\]]+\])[^\]]*$/', static::REGEX_VARIABLE, $previousChar); |
|
543
|
|
|
$previousChar = $previousChar[1]; |
|
544
|
|
|
|
|
545
|
|
|
/* |
|
546
|
|
|
* Make sure word preceding the ['value'] is not a keyword, e.g. |
|
547
|
|
|
* return['x']. Because -again- PHP's regex implementation doesn't allow |
|
548
|
|
|
* unfixed-length look-behind assertions, I'm just going to do a lot of |
|
549
|
|
|
* separate look-behind assertions, one for each keyword. |
|
550
|
|
|
*/ |
|
551
|
|
|
$keywords = $this->getKeywordsForRegex($keywords); |
|
552
|
|
|
$keywords = '(?<!'.implode(')(?<!', $keywords).')'; |
|
553
|
|
|
|
|
554
|
|
|
return preg_replace_callback('/(?<='.$previousChar.'|\])'.$keywords.'\[\s*(([\'"])[0-9]+\\2)\s*\]/u', $callback, $content); |
|
555
|
|
|
} |
|
556
|
|
|
|
|
557
|
|
|
/** |
|
558
|
|
|
* Replaces true & false by !0 and !1. |
|
559
|
|
|
* |
|
560
|
|
|
* @param string $content |
|
561
|
|
|
* |
|
562
|
|
|
* @return string |
|
563
|
|
|
*/ |
|
564
|
|
|
protected function shortenBools($content) |
|
565
|
|
|
{ |
|
566
|
|
|
/* |
|
567
|
|
|
* 'true' or 'false' could be used as property names (which may be |
|
568
|
|
|
* followed by whitespace) - we must not replace those! |
|
569
|
|
|
* Since PHP doesn't allow variable-length (to account for the |
|
570
|
|
|
* whitespace) lookbehind assertions, I need to capture the leading |
|
571
|
|
|
* character and check if it's a `.` |
|
572
|
|
|
*/ |
|
573
|
|
|
$callback = function ($match) { |
|
574
|
|
|
if (trim($match[1]) === '.') { |
|
575
|
|
|
return $match[0]; |
|
576
|
|
|
} |
|
577
|
|
|
|
|
578
|
|
|
return $match[1].($match[2] === 'true' ? '!0' : '!1'); |
|
579
|
|
|
}; |
|
580
|
|
|
$content = preg_replace_callback('/(^|.\s*)\b(true|false)\b(?!:)/', $callback, $content); |
|
581
|
|
|
|
|
582
|
|
|
// for(;;) is exactly the same as while(true), but shorter :) |
|
583
|
|
|
$content = preg_replace('/\bwhile\(!0\){/', 'for(;;){', $content); |
|
584
|
|
|
|
|
585
|
|
|
// now make sure we didn't turn any do ... while(true) into do ... for(;;) |
|
586
|
|
|
preg_match_all('/\bdo\b/', $content, $dos, PREG_OFFSET_CAPTURE | PREG_SET_ORDER); |
|
587
|
|
|
|
|
588
|
|
|
// go backward to make sure positional offsets aren't altered when $content changes |
|
589
|
|
|
$dos = array_reverse($dos); |
|
590
|
|
|
foreach ($dos as $do) { |
|
591
|
|
|
$offsetDo = $do[0][1]; |
|
592
|
|
|
|
|
593
|
|
|
// find all `while` (now `for`) following `do`: one of those must be |
|
594
|
|
|
// associated with the `do` and be turned back into `while` |
|
595
|
|
|
preg_match_all('/\bfor\(;;\)/', $content, $whiles, PREG_OFFSET_CAPTURE | PREG_SET_ORDER, $offsetDo); |
|
596
|
|
|
foreach ($whiles as $while) { |
|
597
|
|
|
$offsetWhile = $while[0][1]; |
|
598
|
|
|
|
|
599
|
|
|
$open = substr_count($content, '{', $offsetDo, $offsetWhile - $offsetDo); |
|
600
|
|
|
$close = substr_count($content, '}', $offsetDo, $offsetWhile - $offsetDo); |
|
601
|
|
|
if ($open === $close) { |
|
602
|
|
|
// only restore `while` if amount of `{` and `}` are the same; |
|
603
|
|
|
// otherwise, that `for` isn't associated with this `do` |
|
604
|
|
|
$content = substr_replace($content, 'while(!0)', $offsetWhile, strlen('for(;;)')); |
|
605
|
|
|
break; |
|
606
|
|
|
} |
|
607
|
|
|
} |
|
608
|
|
|
} |
|
609
|
|
|
|
|
610
|
|
|
return $content; |
|
611
|
|
|
} |
|
612
|
|
|
|
|
613
|
|
|
/** |
|
614
|
|
|
* Protected method in parent made public, so it can be accessed from inside |
|
615
|
|
|
* the closure in extractRegex. Once PHP5.3 compatibility is dropped, we can |
|
616
|
|
|
* remove this. |
|
617
|
|
|
* |
|
618
|
|
|
* {@inheritdoc} |
|
619
|
|
|
*/ |
|
620
|
|
|
public function extractStrings($chars = '\'"', $placeholderPrefix = '') { |
|
621
|
|
|
parent::extractStrings($chars, $placeholderPrefix); |
|
622
|
|
|
} |
|
623
|
|
|
|
|
624
|
|
|
/** |
|
625
|
|
|
* Protected method in parent made public, so it can be accessed from inside |
|
626
|
|
|
* the closure in extractRegex. Once PHP5.3 compatibility is dropped, we can |
|
627
|
|
|
* remove this. |
|
628
|
|
|
* |
|
629
|
|
|
* {@inheritdoc} |
|
630
|
|
|
*/ |
|
631
|
|
|
public function replace($content) { |
|
632
|
|
|
return parent::replace($content); |
|
633
|
|
|
} |
|
634
|
|
|
} |
|
635
|
|
|
|
matthiasmullie /
minify
