+++ /dev/null
-/*
- packer, version 2.0.2 (2005-08-19)
- Copyright 2004-2005, Dean Edwards
- License: http://creativecommons.org/licenses/LGPL/2.1/
-*/
-
-function pack(_script, _encoding, _fastDecode, _specialChars) {
- // constants
- var $IGNORE = "$1";
-
- // validate parameters
- _script += "\n";
- _encoding = Math.min(parseInt(_encoding), 95);
-
- // apply all parsing routines
- function _pack($script) {
- var i, $parse;
- for (i = 0; ($parse = _parsers[i]); i++) {
- $script = $parse($script);
- }
- return $script;
- };
-
- // unpacking function - this is the boot strap function
- // data extracted from this packing routine is passed to
- // this function when decoded in the target
- var _unpack = function($packed, $ascii, $count, $keywords, $encode, $decode) {
- while ($count--)
- if ($keywords[$count])
- $packed = $packed.replace(new RegExp('\\b' + $encode($count) + '\\b', 'g'), $keywords[$count]);
- return $packed;
- };
-
- // code-snippet inserted into the unpacker to speed up decoding
- var _decode = function() {
- // does the browser support String.replace where the
- // replacement value is a function?
- if (!''.replace(/^/, String)) {
- // decode all the values we need
- while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);
- // global replacement function
- $keywords = [function($encoded){return $decode[$encoded]}];
- // generic match
- $encode = function(){return'\\w+'};
- // reset the loop counter - we are now doing a global replace
- $count = 1;
- }
- };
-
- // keep a list of parsing functions, they'll be executed all at once
- var _parsers = [];
- function _addParser($parser) {
- _parsers[_parsers.length] = $parser;
- };
-
- // zero encoding - just removal of white space and comments
- function _basicCompression($script) {
- var $parser = new ParseMaster;
- // make safe
- $parser.escapeChar = "\\";
- // protect strings
- $parser.add(/'[^'\n\r]*'/, $IGNORE);
- $parser.add(/"[^"\n\r]*"/, $IGNORE);
- // remove comments
- $parser.add(/\/\/[^\n\r]*[\n\r]/, " ");
- $parser.add(/\/\*[^*]*\*+([^\/][^*]*\*+)*\//, " ");
- // protect regular expressions
- $parser.add(/\s+(\/[^\/\n\r\*][^\/\n\r]*\/g?i?)/, "$2"); // IGNORE
- $parser.add(/[^\w\x24\/'"*)\?:]\/[^\/\n\r\*][^\/\n\r]*\/g?i?/, $IGNORE);
- // remove: ;;; doSomething();
- if (_specialChars) $parser.add(/;;;[^\n\r]+[\n\r]/);
- // remove redundant semi-colons
- $parser.add(/\(;;\)/, $IGNORE); // protect for (;;) loops
- $parser.add(/;+\s*([};])/, "$2");
- // apply the above
- $script = $parser.exec($script);
-
- // remove white-space
- $parser.add(/(\b|\x24)\s+(\b|\x24)/, "$2 $3");
- $parser.add(/([+\-])\s+([+\-])/, "$2 $3");
- $parser.add(/\s+/, "");
- // done
- return $parser.exec($script);
- };
-
- function _encodeSpecialChars($script) {
- var $parser = new ParseMaster;
- // replace: $name -> n, $$name -> na
- $parser.add(/((\x24+)([a-zA-Z$_]+))(\d*)/, function($match, $offset) {
- var $length = $match[$offset + 2].length;
- var $start = $length - Math.max($length - $match[$offset + 3].length, 0);
- return $match[$offset + 1].substr($start, $length) + $match[$offset + 4];
- });
- // replace: _name -> _0, double-underscore (__name) is ignored
- var $regexp = /\b_[A-Za-z\d]\w*/;
- // build the word list
- var $keywords = _analyze($script, _globalize($regexp), _encodePrivate);
- // quick ref
- var $encoded = $keywords.$encoded;
- $parser.add($regexp, function($match, $offset) {
- return $encoded[$match[$offset]];
- });
- return $parser.exec($script);
- };
-
- function _encodeKeywords($script) {
- // escape high-ascii values already in the script (i.e. in strings)
- if (_encoding > 62) $script = _escape95($script);
- // create the parser
- var $parser = new ParseMaster;
- var $encode = _getEncoder(_encoding);
- // for high-ascii, don't encode single character low-ascii
- var $regexp = (_encoding > 62) ? /\w\w+/ : /\w+/;
- // build the word list
- $keywords = _analyze($script, _globalize($regexp), $encode);
- var $encoded = $keywords.$encoded;
- // encode
- $parser.add($regexp, function($match, $offset) {
- return $encoded[$match[$offset]];
- });
- // if encoded, wrap the script in a decoding function
- return $script && _bootStrap($parser.exec($script), $keywords);
- };
-
- function _analyze($script, $regexp, $encode) {
- // analyse
- // retreive all words in the script
- var $all = $script.match($regexp);
- var $$sorted = []; // list of words sorted by frequency
- var $$encoded = {}; // dictionary of word->encoding
- var $$protected = {}; // instances of "protected" words
- if ($all) {
- var $unsorted = []; // same list, not sorted
- var $protected = {}; // "protected" words (dictionary of word->"word")
- var $values = {}; // dictionary of charCode->encoding (eg. 256->ff)
- var $count = {}; // word->count
- var i = $all.length, j = 0, $word;
- // count the occurrences - used for sorting later
- do {
- $word = "$" + $all[--i];
- if (!$count[$word]) {
- $count[$word] = 0;
- $unsorted[j] = $word;
- // make a dictionary of all of the protected words in this script
- // these are words that might be mistaken for encoding
- $protected["$" + ($values[j] = $encode(j))] = j++;
- }
- // increment the word counter
- $count[$word]++;
- } while (i);
- // prepare to sort the word list, first we must protect
- // words that are also used as codes. we assign them a code
- // equivalent to the word itself.
- // e.g. if "do" falls within our encoding range
- // then we store keywords["do"] = "do";
- // this avoids problems when decoding
- i = $unsorted.length;
- do {
- $word = $unsorted[--i];
- if ($protected[$word] != null) {
- $$sorted[$protected[$word]] = $word.slice(1);
- $$protected[$protected[$word]] = true;
- $count[$word] = 0;
- }
- } while (i);
- // sort the words by frequency
- $unsorted.sort(function($match1, $match2) {
- return $count[$match2] - $count[$match1];
- });
- j = 0;
- // because there are "protected" words in the list
- // we must add the sorted words around them
- do {
- if ($$sorted[i] == null) $$sorted[i] = $unsorted[j++].slice(1);
- $$encoded[$$sorted[i]] = $values[i];
- } while (++i < $unsorted.length);
- }
- return {$sorted: $$sorted, $encoded: $$encoded, $protected: $$protected};
- };
-
- // build the boot function used for loading and decoding
- function _bootStrap($packed, $keywords) {
- var $ENCODE = _safeRegExp("$encode\\($count\\)", "g");
-
- // $packed: the packed script
- $packed = "'" + _escape($packed) + "'";
-
- // $ascii: base for encoding
- var $ascii = Math.min($keywords.$sorted.length, _encoding) || 1;
-
- // $count: number of words contained in the script
- var $count = $keywords.$sorted.length;
-
- // $keywords: list of words contained in the script
- for (var i in $keywords.$protected) $keywords.$sorted[i] = "";
- // convert from a string to an array
- $keywords = "'" + $keywords.$sorted.join("|") + "'.split('|')";
-
- // $encode: encoding function (used for decoding the script)
- var $encode = _encoding > 62 ? _encode95 : _getEncoder($ascii);
- $encode = String($encode).replace(/_encoding/g, "$ascii").replace(/arguments\.callee/g, "$encode");
- var $inline = "$count" + ($ascii > 10 ? ".toString($ascii)" : "");
-
- // $decode: code snippet to speed up decoding
- if (_fastDecode) {
- // create the decoder
- var $decode = _getFunctionBody(_decode);
- if (_encoding > 62) $decode = $decode.replace(/\\\\w/g, "[\\xa1-\\xff]");
- // perform the encoding inline for lower ascii values
- else if ($ascii < 36) $decode = $decode.replace($ENCODE, $inline);
- // special case: when $count==0 there are no keywords. I want to keep
- // the basic shape of the unpacking funcion so i'll frig the code...
- if (!$count) $decode = $decode.replace(_safeRegExp("($count)\\s*=\\s*1"), "$1=0");
- }
-
- // boot function
- var $unpack = String(_unpack);
- if (_fastDecode) {
- // insert the decoder
- $unpack = $unpack.replace(/\{/, "{" + $decode + ";");
- }
- $unpack = $unpack.replace(/"/g, "'");
- if (_encoding > 62) { // high-ascii
- // get rid of the word-boundaries for regexp matches
- $unpack = $unpack.replace(/'\\\\b'\s*\+|\+\s*'\\\\b'/g, "");
- }
- if ($ascii > 36 || _encoding > 62 || _fastDecode) {
- // insert the encode function
- $unpack = $unpack.replace(/\{/, "{$encode=" + $encode + ";");
- } else {
- // perform the encoding inline
- $unpack = $unpack.replace($ENCODE, $inline);
- }
- // pack the boot function too
- $unpack = pack($unpack, 0, false, true);
-
- // arguments
- var $params = [$packed, $ascii, $count, $keywords];
- if (_fastDecode) {
- // insert placeholders for the decoder
- $params = $params.concat(0, "{}");
- }
-
- // the whole thing
- return "eval(" + $unpack + "(" + $params + "))\n";
- };
-
- // mmm.. ..which one do i need ??
- function _getEncoder($ascii) {
- return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ? _encode95 : _encode62 : _encode36 : _encode10;
- };
-
- // zero encoding
- // characters: 0123456789
- var _encode10 = function($charCode) {
- return $charCode;
- };
-
- // inherent base36 support
- // characters: 0123456789abcdefghijklmnopqrstuvwxyz
- var _encode36 = function($charCode) {
- return $charCode.toString(36);
- };
-
- // hitch a ride on base36 and add the upper case alpha characters
- // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
- var _encode62 = function($charCode) {
- return ($charCode < _encoding ? '' : arguments.callee(parseInt($charCode / _encoding))) +
- (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));
- };
-
- // use high-ascii values
- var _encode95 = function($charCode) {
- return ($charCode < _encoding ? '' : arguments.callee($charCode / _encoding)) +
- String.fromCharCode($charCode % _encoding + 161);
- };
-
- // special _chars
- var _encodePrivate = function($charCode) {
- return "_" + $charCode;
- };
-
- // protect characters used by the parser
- function _escape($script) {
- return $script.replace(/([\\'])/g, "\\$1");
- };
-
- // protect high-ascii characters already in the script
- function _escape95($script) {
- return $script.replace(/[\xa1-\xff]/g, function($match) {
- return "\\x" + $match.charCodeAt(0).toString(16);
- });
- };
-
- function _safeRegExp($string, $flags) {
- return new RegExp($string.replace(/\$/g, "\\$"), $flags);
- };
-
- // extract the body of a function
- function _getFunctionBody($function) {
- with (String($function)) return slice(indexOf("{") + 1, lastIndexOf("}"));
- };
-
- // set the global flag on a RegExp (you have to create a new one)
- function _globalize($regexp) {
- return new RegExp(String($regexp).slice(1, -1), "g");
- };
-
- // build the parsing routine
- _addParser(_basicCompression);
- if (_specialChars) _addParser(_encodeSpecialChars);
- if (_encoding) _addParser(_encodeKeywords);
-
- // go!
- return _pack(_script);
-};
git.asbjorn.biz / jquery.git / blobdiff