forked from a64f7bb4-7358-4778-9fbe-3b882c34cc1d/v1
1001 lines
33 KiB
PHP
1001 lines
33 KiB
PHP
<?php
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// @codingStandardsIgnoreFile
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// @ignore comment_docblock_file:file
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// @ignore style_curly_braces:file
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// @ignore style_string_spacing:file
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// @ignore style_else_spacing:file
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// @ignore comment_comment_docblock_missing:file
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// @ignore comment_comment_eg:file
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// @ignore production_code:file
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// @ignore druplart_unary:file
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// @ignore style_uppercase_constants:file
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// @ignore comment_comment_space:file
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// @ignore druplart_conditional_assignment:file
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// @ignore style_paren_spacing:file
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// @ignore style_no_tabs:file
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// @ignore comment_docblock_comment:file
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// @ignore comment_comment_indent:file
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// @ignore style_comma_spacing:file
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// @ignore style_elseif:file
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// @ignore :file
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/*
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* Copyright (C) 2015 Nicolas Grekas - p@tchwork.com
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the (at your option):
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* Apache License v2.0 (see provided LICENCE.ASL20 file), or
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* GNU General Public License v2.0 (see provided LICENCE.GPLv2 file).
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*/
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namespace Patchwork;
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/*
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*
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* This class shrinks Javascript code
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* (a process called minification nowadays)
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*
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* Should work with most valid Javascript code,
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* even when semi-colons are missing.
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*
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* Features:
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* - Removes comments and white spaces.
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* - Renames every local vars, typically to a single character.
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* - Renames also global vars, methods and properties, but only if they
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* are marked special by some naming convention. By default, special
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* var names begin with one or more "$", or with a single "_".
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* - Renames also local/global vars found in strings,
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* but only if they are marked special.
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* - Keep Microsoft's conditional comments.
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* - Output is optimized for later HTTP compression.
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*
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* Notes:
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* - Source code must be parse error free before processing.
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* - In order to maximise later HTTP compression (deflate, gzip),
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* new variables names are chosen by considering closures,
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* variables' frequency and characters' frequency.
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* - If you use with/eval then be careful.
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*
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* Bonus:
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* - Replaces false/true by !1/!0
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* - Replaces new Array/Object by []/{}
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* - Merges consecutive "var" declarations with commas
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* - Merges consecutive concatened strings
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* - Fix a bug in Safari's parser (http://forums.asp.net/thread/1585609.aspx)
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* - Can replace optional semi-colons by line feeds,
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* thus facilitating output debugging.
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* - Keep important comments marked with /*!...
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* - Treats three semi-colons ;;; like single-line comments
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* (http://dean.edwards.name/packer/2/usage/#triple-semi-colon).
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* - Fix special catch scope across browsers
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* - Work around buggy-handling of named function expressions in IE<=8
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*
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* TODO?
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* - foo['bar'] => foo.bar
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* - {'foo':'bar'} => {foo:'bar'}
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* - Dead code removal (never used function)
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* - Munge primitives: var WINDOW=window, etc.
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*/
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class JSqueeze
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{
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const
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SPECIAL_VAR_PACKER = '(\$+[a-zA-Z_]|_[a-zA-Z0-9$])[a-zA-Z0-9_$]*';
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public
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$charFreq;
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protected
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$strings,
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$closures,
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$str0,
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$str1,
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$argFreq,
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$specialVarRx,
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$keepImportantComments,
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$varRx = '(?:[a-zA-Z_$])[a-zA-Z0-9_$]*',
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$reserved = array(
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'abstract','as','boolean','break','byte','case','catch','char','class',
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'const','continue','debugger','default','delete','do','double','else',
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'enum','export','extends','false','final','finally','float','for',
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'function','goto','if','implements','import','in','instanceof','int',
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'long','native','new','null','package','private','protected','public',
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'return','short','static','super','switch','synchronized','this',
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'throw','throws','transient','true','try','typeof','var','void',
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'while','with','yield','let','interface',
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);
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function __construct()
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{
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$this->reserved = array_flip($this->reserved);
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$this->charFreq = array_fill(0, 256, 0);
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}
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/**
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* Squeezes a JavaScript source code.
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*
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* Set $singleLine to false if you want optional
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* semi-colons to be replaced by line feeds.
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*
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* Set $keepImportantComments to false if you want /*! comments to be removed.
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*
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* $specialVarRx defines the regular expression of special variables names
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* for global vars, methods, properties and in string substitution.
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* Set it to false if you don't want any.
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*
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* If the analysed javascript source contains a single line comment like
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* this one, then the directive will overwrite $specialVarRx:
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*
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* // jsqueeze.specialVarRx = your_special_var_regexp_here
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*
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* Only the first directive is parsed, others are ignored. It is not possible
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* to redefine $specialVarRx in the middle of the javascript source.
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*
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* Example:
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* $parser = new JSqueeze;
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* $squeezed_js = $parser->squeeze($fat_js);
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*/
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function squeeze($code, $singleLine = true, $keepImportantComments = true, $specialVarRx = false)
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{
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$code = trim($code);
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if ('' === $code) return '';
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$this->argFreq = array(-1 => 0);
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$this->specialVarRx = $specialVarRx;
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$this->keepImportantComments = !!$keepImportantComments;
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if (preg_match("#//[ \t]*jsqueeze\.specialVarRx[ \t]*=[ \t]*([\"']?)(.*)\1#i", $code, $key))
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{
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if (!$key[1])
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{
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$key[2] = trim($key[2]);
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$key[1] = strtolower($key[2]);
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$key[1] = $key[1] && $key[1] != 'false' && $key[1] != 'none' && $key[1] != 'off';
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}
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$this->specialVarRx = $key[1] ? $key[2] : false;
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}
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// Remove capturing parentheses
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$this->specialVarRx && $this->specialVarRx = preg_replace('/(?<!\\\\)((?:\\\\\\\\)*)\((?!\?)/', '(?:', $this->specialVarRx);
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false !== strpos($code, "\r" ) && $code = strtr(str_replace("\r\n", "\n", $code), "\r", "\n");
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false !== strpos($code, "\xC2\x85" ) && $code = str_replace("\xC2\x85" , "\n", $code); // Next Line
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false !== strpos($code, "\xE2\x80\xA8") && $code = str_replace("\xE2\x80\xA8", "\n", $code); // Line Separator
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false !== strpos($code, "\xE2\x80\xA9") && $code = str_replace("\xE2\x80\xA9", "\n", $code); // Paragraph Separator
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list($code, $this->strings ) = $this->extractStrings( $code);
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list($code, $this->closures) = $this->extractClosures($code);
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$key = "//''\"\"#0'"; // This crap has a wonderful property: it can not happen in any valid javascript, even in strings
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$this->closures[$key] =& $code;
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$tree = array($key => array('parent' => false));
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$this->makeVars($code, $tree[$key], $key);
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$this->renameVars($tree[$key], true);
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$code = substr($tree[$key]['code'], 1);
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$code = preg_replace("'\breturn !'", 'return!', $code);
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$code = preg_replace("'\}(?=(else|while)[^\$.a-zA-Z0-9_])'", "}\r", $code);
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$code = str_replace(array_keys($this->strings), array_values($this->strings), $code);
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if ($singleLine) $code = strtr($code, "\n", ';');
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else $code = str_replace("\n", ";\n", $code);
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false !== strpos($code, "\r") && $code = strtr(trim($code), "\r", "\n");
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// Cleanup memory
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$this->charFreq = array_fill(0, 256, 0);
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$this->strings = $this->closures = $this->argFreq = array();
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$this->str0 = $this->str1 = '';
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return $code;
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}
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protected function extractStrings($f)
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{
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if ($cc_on = false !== strpos($f, '@cc_on'))
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{
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// Protect conditional comments from being removed
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$f = str_replace('#', '##', $f);
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$f = str_replace('/*@', '1#@', $f);
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$f = preg_replace("'//@([^\n]+)'", '2#@$1@#3', $f);
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$f = str_replace('@*/', '@#1', $f);
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}
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$len = strlen($f);
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$code = str_repeat(' ', $len);
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$j = 0;
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$strings = array();
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$K = 0;
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$instr = false;
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$q = array(
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"'", '"',
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"'" => 0,
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'"' => 0,
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);
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// Extract strings, removes comments
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for ($i = 0; $i < $len; ++$i)
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{
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if ($instr)
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{
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if ('//' == $instr)
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{
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if ("\n" == $f[$i])
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{
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$f[$i--] = ' ';
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$instr = false;
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}
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}
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else if ($f[$i] == $instr || ('/' == $f[$i] && "/'" == $instr))
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{
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if ('!' == $instr) ;
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else if ('*' == $instr)
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{
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if ('/' == $f[$i+1])
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{
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++$i;
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$instr = false;
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}
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}
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else
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{
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if ("/'" == $instr)
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{
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while (isset ($f[$i+1]) && false !== strpos('gmi', $f[$i+1])) $s[] = $f[$i++];
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$s[] = $f[$i];
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}
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$instr = false;
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}
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}
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else if ('*' == $instr) ;
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else if ('!' == $instr)
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{
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if ('*' == $f[$i] && '/' == $f[$i+1])
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{
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$s[] = "*/\r";
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++$i;
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$instr = false;
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}
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else if ("\n" == $f[$i]) $s[] = "\r";
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else $s[] = $f[$i];
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}
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else if ('\\' == $f[$i])
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{
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++$i;
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if ("\n" != $f[$i])
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{
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isset($q[$f[$i]]) && ++$q[$f[$i]];
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$s[] = '\\' . $f[$i];
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}
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}
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else if ('[' == $f[$i] && "/'" == $instr)
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{
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$instr = '/[';
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$s[] = '[';
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}
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else if (']' == $f[$i] && '/[' == $instr)
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{
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$instr = "/'";
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$s[] = ']';
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}
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else if ("'" == $f[$i] || '"' == $f[$i])
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{
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++$q[$f[$i]];
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$s[] = '\\' . $f[$i];
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}
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else $s[] = $f[$i];
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}
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else switch ($f[$i])
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{
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case ';':
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// Remove triple semi-colon
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if ($i>0 && ';' == $f[$i-1] && $i+1 < $len && ';' == $f[$i+1]) $f[$i] = $f[$i+1] = '/';
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else
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{
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$code[++$j] = ';';
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break;
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}
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case '/':
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if ('*' == $f[$i+1])
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{
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++$i;
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$instr = '*';
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if ($this->keepImportantComments && '!' == $f[$i+1])
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{
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++$i;
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// no break here
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}
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else break;
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}
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else if ('/' == $f[$i+1])
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{
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++$i;
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$instr = '//';
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break;
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}
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else
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{
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$a = $j && ' ' == $code[$j] ? $code[$j-1] : $code[$j];
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if (false !== strpos('-!%&;<=>~:^+|,(*?[{ ', $a)
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|| (false !== strpos('oenfd', $a)
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&& preg_match(
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"'(?<![\$.a-zA-Z0-9_])(do|else|return|typeof|yield) ?$'",
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substr($code, $j-7, 8)
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)))
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{
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$key = "//''\"\"" . $K++ . $instr = "/'";
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$a = $j;
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$code .= $key;
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while (isset($key[++$j-$a-1])) $code[$j] = $key[$j-$a-1]; --$j;
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isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
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$strings[$key] = array('/');
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$s =& $strings[$key];
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}
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else $code[++$j] = '/';
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break;
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}
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case "'":
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case '"':
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$instr = $f[$i];
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$key = "//''\"\"" . $K++ . ('!' == $instr ? ']' : "'");
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$a = $j;
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$code .= $key;
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while (isset($key[++$j-$a-1])) $code[$j] = $key[$j-$a-1]; --$j;
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isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
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$strings[$key] = array();
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$s =& $strings[$key];
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'!' == $instr && $s[] = "\r/*!";
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break;
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case "\n":
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if ($j > 5)
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{
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' ' == $code[$j] && --$j;
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$code[++$j] =
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false !== strpos('kend', $code[$j-1])
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&& preg_match(
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"'(?<![\$.a-zA-Z0-9_])(break|continue|return|yield) ?$'",
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substr($code, $j-8, 9)
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)
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? ';' : ' ';
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break;
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}
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case "\t": $f[$i] = ' ';
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case ' ':
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if (!$j || ' ' == $code[$j]) break;
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default:
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$code[++$j] = $f[$i];
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}
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}
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isset($s) && ($s = implode('', $s)) && $cc_on && $this->restoreCc($s);
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unset($s);
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$code = substr($code, 0, $j+1);
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$cc_on && $this->restoreCc($code, false);
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// Protect wanted spaces and remove unwanted ones
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$code = str_replace('- -', "-\x7F-", $code);
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$code = str_replace('+ +', "+\x7F+", $code);
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$code = preg_replace("'(\d)\s+\.\s*([a-zA-Z\$_[(])'", "$1\x7F.$2", $code);
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$code = preg_replace("# ([-!%&;<=>~:.^+|,()*?[\]{}/']+)#", '$1', $code);
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$code = preg_replace( "#([-!%&;<=>~:.^+|,()*?[\]{}/]+) #", '$1', $code);
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// Replace new Array/Object by []/{}
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false !== strpos($code, 'new Array' ) && $code = preg_replace( "'new Array(?:\(\)|([;\])},:]))'", '[]$1', $code);
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false !== strpos($code, 'new Object') && $code = preg_replace("'new Object(?:\(\)|([;\])},:]))'", '{}$1', $code);
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// Add missing semi-colons after curly braces
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// This adds more semi-colons than strictly needed,
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// but it seems that later gzipping is favorable to the repetition of "};"
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$code = preg_replace("'\}(?![:,;.()\[\]}\|&]|(else|catch|finally|while)[^\$.a-zA-Z0-9_])'", '};', $code);
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// Tag possible empty instruction for easy detection
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$code = preg_replace("'(?<![\$.a-zA-Z0-9_])if\('" , '1#(', $code);
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$code = preg_replace("'(?<![\$.a-zA-Z0-9_])for\('" , '2#(', $code);
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$code = preg_replace("'(?<![\$.a-zA-Z0-9_])while\('", '3#(', $code);
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$forPool = array();
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$instrPool = array();
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$s = 0;
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$f = array();
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$j = -1;
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// Remove as much semi-colon as possible
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$len = strlen($code);
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for ($i = 0; $i < $len; ++$i)
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{
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switch ($code[$i])
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{
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case '(':
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if ($j>=0 && "\n" == $f[$j]) $f[$j] = ';';
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++$s;
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if ($i && '#' == $code[$i-1])
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{
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$instrPool[$s - 1] = 1;
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if ('2' == $code[$i-2]) $forPool[$s] = 1;
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}
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$f[++$j] = '(';
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break;
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case ']':
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case ')':
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if ($i+1 < $len && !isset($forPool[$s]) && !isset($instrPool[$s-1]) && preg_match("'[a-zA-Z0-9_\$]'", $code[$i+1]))
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{
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$f[$j] .= $code[$i];
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$f[++$j] = "\n";
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}
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else $f[++$j] = $code[$i];
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if (')' == $code[$i])
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{
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unset($forPool[$s]);
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--$s;
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}
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continue 2;
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case '}':
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if ("\n" == $f[$j]) $f[$j] = '}';
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else $f[++$j] = '}';
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break;
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case ';':
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if (isset($forPool[$s]) || isset($instrPool[$s])) $f[++$j] = ';';
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else if ($j>=0 && "\n" != $f[$j] && ';' != $f[$j]) $f[++$j] = "\n";
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break;
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case '#':
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switch ($f[$j])
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{
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case '1': $f[$j] = 'if'; break 2;
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case '2': $f[$j] = 'for'; break 2;
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case '3': $f[$j] = 'while'; break 2;
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}
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case '[';
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if ($j>=0 && "\n" == $f[$j]) $f[$j] = ';';
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|
|
|
default: $f[++$j] = $code[$i];
|
|
}
|
|
|
|
unset($instrPool[$s]);
|
|
}
|
|
|
|
$f = implode('', $f);
|
|
$cc_on && $f = str_replace('@#3', "\n", $f);
|
|
|
|
// Fix "else ;" empty instructions
|
|
$f = preg_replace("'(?<![\$.a-zA-Z0-9_])else\n'", "\n", $f);
|
|
|
|
$r1 = array( // keywords with a direct object
|
|
'case','delete','do','else','function','in','instanceof','break',
|
|
'new','return','throw','typeof','var','void','yield','let','if',
|
|
'const',
|
|
);
|
|
|
|
$r2 = array( // keywords with a subject
|
|
'in','instanceof',
|
|
);
|
|
|
|
// Fix missing semi-colons
|
|
$f = preg_replace("'(?<!(?<![a-zA-Z0-9_\$])" . implode(')(?<!(?<![a-zA-Z0-9_\$])', $r1) . ") (?!(" . implode('|', $r2) . ")(?![a-zA-Z0-9_\$]))'", "\n", $f);
|
|
$f = preg_replace("'(?<!(?<![a-zA-Z0-9_\$])do)(?<!(?<![a-zA-Z0-9_\$])else) if\('", "\nif(", $f);
|
|
$f = preg_replace("'(?<=--|\+\+)(?<![a-zA-Z0-9_\$])(" . implode('|', $r1) . ")(?![a-zA-Z0-9_\$])'", "\n$1", $f);
|
|
$f = preg_replace("'(?<![a-zA-Z0-9_\$])for\neach\('", 'for each(', $f);
|
|
$f = preg_replace("'(?<![a-zA-Z0-9_\$])\n(" . implode('|', $r2) . ")(?![a-zA-Z0-9_\$])'", '$1', $f);
|
|
|
|
// Merge strings
|
|
if ($q["'"] > $q['"']) $q = array($q[1], $q[0]);
|
|
$f = preg_replace("#//''\"\"[0-9]+'#", $q[0] . '$0' . $q[0], $f);
|
|
strpos($f, $q[0] . '+' . $q[0]) && $f = str_replace($q[0] . '+' . $q[0], '', $f);
|
|
$len = count($strings);
|
|
foreach ($strings as $r1 => &$r2)
|
|
{
|
|
$r2 = "/'" == substr($r1, -2)
|
|
? str_replace(array("\\'", '\\"'), array("'", '"'), $r2)
|
|
: str_replace('\\' . $q[1], $q[1], $r2);
|
|
}
|
|
|
|
// Restore wanted spaces
|
|
$f = strtr($f, "\x7F", ' ');
|
|
|
|
return array($f, $strings);
|
|
}
|
|
|
|
protected function extractClosures($code)
|
|
{
|
|
$code = ';' . $code;
|
|
|
|
$this->argFreq[-1] += substr_count($code, '}catch(');
|
|
|
|
if ($this->argFreq[-1])
|
|
{
|
|
// Special catch scope handling
|
|
|
|
// FIXME: this implementation doesn't work with nested catch scopes who need
|
|
// access to their parent's caught variable (but who needs that?).
|
|
|
|
$f = preg_split("@}catch\(({$this->varRx})@", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
|
|
$code = 'catch$scope$var' . mt_rand();
|
|
$this->specialVarRx = $this->specialVarRx ? '(?:' . $this->specialVarRx . '|' . preg_quote($code) . ')' : preg_quote($code);
|
|
$i = count($f) - 1;
|
|
|
|
while ($i)
|
|
{
|
|
$c = 1;
|
|
$j = 0;
|
|
$l = strlen($f[$i]);
|
|
|
|
while ($c && $j < $l)
|
|
{
|
|
$s = $f[$i][$j++];
|
|
$c += '(' == $s ? 1 : (')' == $s ? -1 : 0);
|
|
}
|
|
|
|
if (!$c) do
|
|
{
|
|
$s = $f[$i][$j++];
|
|
$c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
|
|
}
|
|
while ($c && $j < $l);
|
|
|
|
$c = preg_quote($f[$i-1], '#');
|
|
$f[$i-2] .= '}catch(' . preg_replace("#([.,{]?)(?<![a-zA-Z0-9_\$@]){$c}\\b#", '$1' . $code, $f[$i-1] . substr($f[$i], 0, $j)) . substr($f[$i], $j);
|
|
|
|
unset($f[$i--], $f[$i--]);
|
|
}
|
|
|
|
$code = $f[0];
|
|
}
|
|
|
|
$f = preg_split("'(?<![a-zA-Z0-9_\$])(function[ (].*?\{)'", $code, -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
$i = count($f) - 1;
|
|
$closures = array();
|
|
|
|
while ($i)
|
|
{
|
|
$c = 1;
|
|
$j = 0;
|
|
$l = strlen($f[$i]);
|
|
|
|
while ($c && $j < $l)
|
|
{
|
|
$s = $f[$i][$j++];
|
|
$c += '{' == $s ? 1 : ('}' == $s ? -1 : 0);
|
|
}
|
|
|
|
switch (substr($f[$i-2], -1))
|
|
{
|
|
default: if (false !== $c = strpos($f[$i-1], ' ', 8)) break;
|
|
case false: case "\n": case ';': case '{': case '}': case ')': case ']':
|
|
$c = strpos($f[$i-1], '(', 8);
|
|
}
|
|
|
|
$l = "//''\"\"#$i'";
|
|
$code = substr($f[$i-1], $c);
|
|
$closures[$l] = $code . substr($f[$i], 0, $j);
|
|
$f[$i-2] .= substr($f[$i-1], 0, $c) . $l . substr($f[$i], $j);
|
|
|
|
if ('(){' !== $code)
|
|
{
|
|
$j = substr_count($code, ',');
|
|
do isset($this->argFreq[$j]) ? ++$this->argFreq[$j] : $this->argFreq[$j] = 1;
|
|
while ($j--);
|
|
}
|
|
|
|
$i -= 2;
|
|
}
|
|
|
|
return array($f[0], $closures);
|
|
}
|
|
|
|
protected function makeVars($closure, &$tree, $key)
|
|
{
|
|
$tree['code'] =& $closure;
|
|
$tree['nfe'] = false;
|
|
$tree['used'] = array();
|
|
$tree['local'] = array();
|
|
|
|
// Replace multiple "var" declarations by a single one
|
|
$closure = preg_replace_callback("'(?<=[\n\{\}])var [^\n\{\}]+(?:\nvar [^\n\{\}]+)+'", array(&$this, 'mergeVarDeclarations'), $closure);
|
|
|
|
// Get all local vars (functions, arguments and "var" prefixed)
|
|
|
|
$vars =& $tree['local'];
|
|
|
|
if (preg_match("'^( [^(]*)?\((.*?)\)\{'", $closure, $v))
|
|
{
|
|
if ($v[1])
|
|
{
|
|
$vars[$tree['nfe'] = substr($v[1], 1)] = -1;
|
|
$tree['parent']['local'][';' . $key] =& $vars[$tree['nfe']];
|
|
}
|
|
|
|
if ($v[2])
|
|
{
|
|
$i = 0;
|
|
$v = explode(',', $v[2]);
|
|
foreach ($v as $w) $vars[$w] = $this->argFreq[$i++] - 1; // Give a bonus to argument variables
|
|
}
|
|
}
|
|
|
|
$v = preg_split("'(?<![\$.a-zA-Z0-9_])var '", $closure);
|
|
if ($i = count($v) - 1)
|
|
{
|
|
$w = array();
|
|
|
|
while ($i)
|
|
{
|
|
$j = $c = 0;
|
|
$l = strlen($v[$i]);
|
|
|
|
while ($j < $l)
|
|
{
|
|
switch ($v[$i][$j])
|
|
{
|
|
case '(': case '[': case '{':
|
|
++$c;
|
|
break;
|
|
|
|
case ')': case ']': case '}':
|
|
if ($c-- <= 0) break 2;
|
|
break;
|
|
|
|
case ';': case "\n":
|
|
if (!$c) break 2;
|
|
|
|
default:
|
|
$c || $w[] = $v[$i][$j];
|
|
}
|
|
|
|
++$j;
|
|
}
|
|
|
|
$w[] = ',';
|
|
--$i;
|
|
}
|
|
|
|
$v = explode(',', implode('', $w));
|
|
foreach ($v as $w) if (preg_match("'^{$this->varRx}'", $w, $v)) isset($vars[$v[0]]) || $vars[$v[0]] = 0;
|
|
}
|
|
|
|
if (preg_match_all("@function ({$this->varRx})//''\"\"#@", $closure, $v))
|
|
{
|
|
foreach ($v[1] as $w) isset($vars[$w]) || $vars[$w] = 0;
|
|
}
|
|
|
|
if ($this->argFreq[-1] && preg_match_all("@}catch\(({$this->varRx})@", $closure, $v))
|
|
{
|
|
$v[0] = array();
|
|
foreach ($v[1] as $w) isset($v[0][$w]) ? ++$v[0][$w] : $v[0][$w] = 1;
|
|
foreach ($v[0] as $w => $v) $vars[$w] = $this->argFreq[-1] - $v;
|
|
}
|
|
|
|
// Get all used vars, local and non-local
|
|
|
|
$vars =& $tree['used'];
|
|
|
|
if (preg_match_all("#([.,{]?)(?<![a-zA-Z0-9_\$])({$this->varRx})(:?)#", $closure, $w, PREG_SET_ORDER))
|
|
{
|
|
foreach ($w as $k)
|
|
{
|
|
if (',' === $k[1] || '{' === $k[1])
|
|
{
|
|
if (':' === substr($k[3], -1)) $k = '.' . $k[2];
|
|
else $k = $k[2];
|
|
}
|
|
else $k = $k[1] . $k[2];
|
|
|
|
isset($vars[$k]) ? ++$vars[$k] : $vars[$k] = 1;
|
|
}
|
|
}
|
|
|
|
if (preg_match_all("#//''\"\"[0-9]+(?:['!]|/')#", $closure, $w)) foreach ($w[0] as $a)
|
|
{
|
|
$v = "'" === substr($a, -1) && "/'" !== substr($a, -2) && $this->specialVarRx
|
|
? preg_split("#([.,{]?(?<![a-zA-Z0-9_\$@]){$this->specialVarRx}:?)#", $this->strings[$a], -1, PREG_SPLIT_DELIM_CAPTURE)
|
|
: array($this->strings[$a]);
|
|
$a = count($v);
|
|
|
|
for ($i = 0; $i < $a; ++$i)
|
|
{
|
|
$k = $v[$i];
|
|
|
|
if (1 === $i%2)
|
|
{
|
|
if (',' === $k[0] || '{' === $k[0])
|
|
{
|
|
if (':' === substr($k, -1)) $k = '.' . substr($k, 1, -1);
|
|
else $k = substr($k, 1);
|
|
}
|
|
else if (':' === substr($k, -1)) $k = substr($k, 0, -1);
|
|
|
|
$w =& $tree;
|
|
|
|
while (isset($w['parent']) && !(isset($w['used'][$k]) || isset($w['local'][$k]))) $w =& $w['parent'];
|
|
|
|
(isset($w['used'][$k]) || isset($w['local'][$k])) && (isset($vars[$k]) ? ++$vars[$k] : $vars[$k] = 1);
|
|
|
|
unset($w);
|
|
}
|
|
|
|
if (0 === $i%2 || !isset($vars[$k])) foreach (count_chars($v[$i], 1) as $k => $w) $this->charFreq[$k] += $w;
|
|
}
|
|
}
|
|
|
|
// Propagate the usage number to parents
|
|
|
|
foreach ($vars as $w => $a)
|
|
{
|
|
$k =& $tree;
|
|
$chain = array();
|
|
do
|
|
{
|
|
$vars =& $k['local'];
|
|
$chain[] =& $k;
|
|
if (isset($vars[$w]))
|
|
{
|
|
unset($k['used'][$w]);
|
|
if (isset($vars[$w])) $vars[$w] += $a;
|
|
else $vars[$w] = $a;
|
|
$a = false;
|
|
break;
|
|
}
|
|
}
|
|
while ($k['parent'] && $k =& $k['parent']);
|
|
|
|
if ($a && !$k['parent'])
|
|
{
|
|
if (isset($vars[$w])) $vars[$w] += $a;
|
|
else $vars[$w] = $a;
|
|
}
|
|
|
|
if (isset($tree['used'][$w]) && isset($vars[$w])) foreach ($chain as &$b)
|
|
{
|
|
isset($b['local'][$w]) || $b['used'][$w] =& $vars[$w];
|
|
}
|
|
}
|
|
|
|
// Analyse childs
|
|
|
|
$tree['childs'] = array();
|
|
$vars =& $tree['childs'];
|
|
|
|
if (preg_match_all("@//''\"\"#[0-9]+'@", $closure, $w))
|
|
{
|
|
foreach ($w[0] as $a)
|
|
{
|
|
$vars[$a] = array('parent' => &$tree);
|
|
$this->makeVars($this->closures[$a], $vars[$a], $a);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected function mergeVarDeclarations($m)
|
|
{
|
|
return str_replace("\nvar ", ',', $m[0]);
|
|
}
|
|
|
|
protected function renameVars(&$tree, $root)
|
|
{
|
|
if ($root)
|
|
{
|
|
$tree['local'] += $tree['used'];
|
|
$tree['used'] = array();
|
|
|
|
foreach ($tree['local'] as $k => $v)
|
|
{
|
|
if ('.' == $k[0]) $k = substr($k, 1);
|
|
|
|
if ('true' === $k) $this->charFreq[48] += $v;
|
|
else if ('false' === $k) $this->charFreq[49] += $v;
|
|
else if (!$this->specialVarRx || !preg_match("#^{$this->specialVarRx}$#", $k))
|
|
{
|
|
foreach (count_chars($k, 1) as $k => $w) $this->charFreq[$k] += $w * $v;
|
|
}
|
|
else if (2 == strlen($k)) $tree['used'][] = $k[1];
|
|
}
|
|
|
|
arsort($this->charFreq);
|
|
|
|
$this->str0 = '';
|
|
$this->str1 = '';
|
|
|
|
foreach ($this->charFreq as $k => $v)
|
|
{
|
|
if (!$v) break;
|
|
|
|
$v = chr($k);
|
|
|
|
if ((64 < $k && $k < 91) || (96 < $k && $k < 123)) // A-Z a-z
|
|
{
|
|
$this->str0 .= $v;
|
|
$this->str1 .= $v;
|
|
}
|
|
else if (47 < $k && $k < 58) // 0-9
|
|
{
|
|
$this->str1 .= $v;
|
|
}
|
|
}
|
|
|
|
if ('' === $this->str0)
|
|
{
|
|
$this->str0 = 'claspemitdbfrugnjvhowkxqyzCLASPEMITDBFRUGNJVHOWKXQYZ';
|
|
$this->str1 = $this->str0 . '0123456789';
|
|
}
|
|
|
|
foreach ($tree['local'] as $var => $root)
|
|
{
|
|
if ('.' != substr($var, 0, 1) && isset($tree['local'][".{$var}"])) $tree['local'][$var] += $tree['local'][".{$var}"];
|
|
}
|
|
|
|
foreach ($tree['local'] as $var => $root)
|
|
{
|
|
if ('.' == substr($var, 0, 1) && isset($tree['local'][substr($var, 1)])) $tree['local'][$var] = $tree['local'][substr($var, 1)];
|
|
}
|
|
|
|
arsort($tree['local']);
|
|
|
|
foreach ($tree['local'] as $var => $root) switch (substr($var, 0, 1))
|
|
{
|
|
case '.':
|
|
if (!isset($tree['local'][substr($var, 1)]))
|
|
{
|
|
$tree['local'][$var] = '#' . ($this->specialVarRx && 3 < strlen($var) && preg_match("'^\.{$this->specialVarRx}$'", $var) ? $this->getNextName($tree) . '$' : substr($var, 1));
|
|
}
|
|
break;
|
|
|
|
case ';': $tree['local'][$var] = 0 === $root ? '' : $this->getNextName($tree);
|
|
case '#': break;
|
|
|
|
default:
|
|
$root = $this->specialVarRx && 2 < strlen($var) && preg_match("'^{$this->specialVarRx}$'", $var) ? $this->getNextName($tree) . '$' : $var;
|
|
$tree['local'][$var] = $root;
|
|
if (isset($tree['local'][".{$var}"])) $tree['local'][".{$var}"] = '#' . $root;
|
|
}
|
|
|
|
foreach ($tree['local'] as $var => $root) $tree['local'][$var] = preg_replace("'^#'", '.', $tree['local'][$var]);
|
|
}
|
|
else
|
|
{
|
|
arsort($tree['local']);
|
|
if (false !== $tree['nfe']) $tree['used'][] = $tree['local'][$tree['nfe']];
|
|
|
|
foreach ($tree['local'] as $var => $root)
|
|
if ($tree['nfe'] !== $var)
|
|
$tree['local'][$var] = 0 === $root ? '' : $this->getNextName($tree);
|
|
}
|
|
|
|
$this->local_tree =& $tree['local'];
|
|
$this->used_tree =& $tree['used'];
|
|
|
|
$tree['code'] = preg_replace_callback("#[.,{ ]?(?<![a-zA-Z0-9_\$@]){$this->varRx}:?#", array(&$this, 'getNewName'), $tree['code']);
|
|
$this->specialVarRx && $tree['code'] = preg_replace_callback("#//''\"\"[0-9]+'#", array(&$this, 'renameInString'), $tree['code']);
|
|
|
|
foreach ($tree['childs'] as $a => &$b)
|
|
{
|
|
$this->renameVars($b, false);
|
|
$tree['code'] = str_replace($a, $b['code'], $tree['code']);
|
|
unset($tree['childs'][$a]);
|
|
}
|
|
}
|
|
|
|
protected function renameInString($a)
|
|
{
|
|
$b =& $this->strings[$a[0]];
|
|
unset($this->strings[$a[0]]);
|
|
|
|
return preg_replace_callback(
|
|
"#[.,{]?(?<![a-zA-Z0-9_\$@]){$this->specialVarRx}:?#",
|
|
array(&$this, 'getNewName'),
|
|
$b
|
|
);
|
|
}
|
|
|
|
protected function getNewName($m)
|
|
{
|
|
$m = $m[0];
|
|
|
|
$pre = '.' === $m[0] ? '.' : '';
|
|
$post = '';
|
|
|
|
if (',' === $m[0] || '{' === $m[0] || ' ' === $m[0])
|
|
{
|
|
$pre = $m[0];
|
|
|
|
if (':' === substr($m, -1))
|
|
{
|
|
$post = ':';
|
|
$m = (' ' !== $m[0] ? '.' : '') . substr($m, 1, -1);
|
|
}
|
|
else $m = substr($m, 1);
|
|
}
|
|
else if (':' === substr($m, -1))
|
|
{
|
|
$post = ':';
|
|
$m = substr($m, 0, -1);
|
|
}
|
|
|
|
$post = (isset($this->reserved[$m])
|
|
? ('true' === $m ? '!0' : ('false' === $m ? '!1': $m))
|
|
: (
|
|
isset($this->local_tree[$m])
|
|
? $this->local_tree[$m]
|
|
: (
|
|
isset($this->used_tree[$m])
|
|
? $this->used_tree[$m]
|
|
: $m
|
|
)
|
|
)
|
|
) . $post;
|
|
|
|
return '' === $post ? '' : ($pre . ('.' === $post[0] ? substr($post, 1) : $post));
|
|
}
|
|
|
|
protected function getNextName(&$tree = array(), &$counter = false)
|
|
{
|
|
if (false === $counter)
|
|
{
|
|
$counter =& $tree['counter'];
|
|
isset($counter) || $counter = -1;
|
|
$exclude = array_flip($tree['used']);
|
|
}
|
|
else $exclude = $tree;
|
|
|
|
++$counter;
|
|
|
|
$len0 = strlen($this->str0);
|
|
$len1 = strlen($this->str0);
|
|
|
|
$name = $this->str0[$counter % $len0];
|
|
|
|
$i = intval($counter / $len0) - 1;
|
|
while ($i>=0)
|
|
{
|
|
$name .= $this->str1[ $i % $len1 ];
|
|
$i = intval($i / $len1) - 1;
|
|
}
|
|
|
|
return !(isset($this->reserved[$name]) || isset($exclude[$name])) ? $name : $this->getNextName($exclude, $counter);
|
|
}
|
|
|
|
protected function restoreCc(&$s, $lf = true)
|
|
{
|
|
$lf && $s = str_replace('@#3', '', $s);
|
|
|
|
$s = str_replace('@#1', '@*/', $s);
|
|
$s = str_replace('2#@', '//@', $s);
|
|
$s = str_replace('1#@', '/*@', $s);
|
|
$s = str_replace('##', '#', $s);
|
|
}
|
|
}
|