complete website code

js/build/ParseMaster.js

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+/*
+    ParseMaster, version 1.0.2 (2005-08-19)
+    Copyright 2005, Dean Edwards
+    License: http://creativecommons.org/licenses/LGPL/2.1/
+*/
+
+/* a multi-pattern parser */
+
+// KNOWN BUG: erroneous behavior when using escapeChar with a replacement value that is a function
+
+function ParseMaster() {
+    // constants
+    var $EXPRESSION = 0, $REPLACEMENT = 1, $LENGTH = 2;
+    // used to determine nesting levels
+    var $GROUPS = /\(/g, $SUB_REPLACE = /\$\d/, $INDEXED = /^\$\d+$/,
+        $TRIM = /(['"])\1\+(.*)\+\1\1$/, $$ESCAPE = /\\./g, $QUOTE = /'/,
+        $$DELETED = /\x01[^\x01]*\x01/g;
+    var self = this;
+    // public
+    this.add = function($expression, $replacement) {
+        if (!$replacement) $replacement = "";
+        // count the number of sub-expressions
+        //  - add one because each pattern is itself a sub-expression
+        var $length = (_internalEscape(String($expression)).match($GROUPS) || "").length + 1;
+        // does the pattern deal with sub-expressions?
+        if ($SUB_REPLACE.test($replacement)) {
+            // a simple lookup? (e.g. "$2")
+            if ($INDEXED.test($replacement)) {
+                // store the index (used for fast retrieval of matched strings)
+                $replacement = parseInt($replacement.slice(1)) - 1;
+            } else { // a complicated lookup (e.g. "Hello $2 $1")
+                // build a function to do the lookup
+                var i = $length;
+                var $quote = $QUOTE.test(_internalEscape($replacement)) ? '"' : "'";
+                while (i) $replacement = $replacement.split("$" + i--).join($quote + "+a[o+" + i + "]+" + $quote);
+                $replacement = new Function("a,o", "return" + $quote + $replacement.replace($TRIM, "$1") + $quote);
+            }
+        }
+        // pass the modified arguments
+        _add($expression || "/^$/", $replacement, $length);
+    };
+    // execute the global replacement
+    this.exec = function($string) {
+        _escaped.length = 0;
+        return _unescape(_escape($string, this.escapeChar).replace(
+            new RegExp(_patterns, this.ignoreCase ? "gi" : "g"), _replacement), this.escapeChar).replace($$DELETED, "");
+    };
+    // clear the patterns collection so that this object may be re-used
+    this.reset = function() {
+        _patterns.length = 0;
+    };
+
+    // private
+    var _escaped = [];  // escaped characters
+    var _patterns = []; // patterns stored by index
+    var _toString = function(){return "(" + String(this[$EXPRESSION]).slice(1, -1) + ")"};
+    _patterns.toString = function(){return this.join("|")};
+    // create and add a new pattern to the patterns collection
+    function _add() {
+        arguments.toString = _toString;
+        // store the pattern - as an arguments object (i think this is quicker..?)
+        _patterns[_patterns.length] = arguments;
+    }
+    // this is the global replace function (it's quite complicated)
+    function _replacement() {
+        if (!arguments[0]) return "";
+        var i = 1, j = 0, $pattern;
+        // loop through the patterns
+        while ($pattern = _patterns[j++]) {
+            // do we have a result?
+            if (arguments[i]) {
+                var $replacement = $pattern[$REPLACEMENT];
+                switch (typeof $replacement) {
+                    case "function": return $replacement(arguments, i);
+                    case "number": return arguments[$replacement + i];
+                }
+                var $delete = (arguments[i].indexOf(self.escapeChar) == -1) ? "" :
+                    "\x01" + arguments[i] + "\x01";
+                return $delete + $replacement;
+            // skip over references to sub-expressions
+            } else i += $pattern[$LENGTH];
+        }
+    };
+    // encode escaped characters
+    function _escape($string, $escapeChar) {
+        return $escapeChar ? $string.replace(new RegExp("\\" + $escapeChar + "(.)", "g"), function($match, $char) {
+            _escaped[_escaped.length] = $char;
+            return $escapeChar;
+        }) : $string;
+    };
+    // decode escaped characters
+    function _unescape($string, $escapeChar) {
+        var i = 0;
+        return $escapeChar ? $string.replace(new RegExp("\\" + $escapeChar, "g"), function() {
+            return $escapeChar + (_escaped[i++] || "");
+        }) : $string;
+    };
+    function _internalEscape($string) {
+        return $string.replace($$ESCAPE, "");
+    };
+};
+ParseMaster.prototype = {
+    constructor: ParseMaster,
+    ignoreCase: false,
+    escapeChar: ""
+};