/**
* TrimPath Template. Release 1.0.38.
* Copyright (C) 2004, 2005 Metaha.
* 
* TrimPath Template is licensed under the GNU General Public License
* and the Apache License, Version 2.0, as follows:
*
* This program is free software; you can redistribute it and/or 
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* 
* This program is distributed WITHOUT ANY WARRANTY; without even the 
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
* See the GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* 
* http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var TrimPath;

// TODO: Debugging mode vs stop-on-error mode - runtime flag.
// TODO: Handle || (or) characters and backslashes.
// TODO: Add more modifiers.

(function() {               // Using a closure to keep global namespace clean.
	if (TrimPath == null)
		TrimPath = new Object();
	if (TrimPath.evalEx == null)
		TrimPath.evalEx = function(src) { return eval(src); };

	var UNDEFINED;
	if (Array.prototype.pop == null)  // IE 5.x fix from Igor Poteryaev.
		Array.prototype.pop = function() {
			if (this.length === 0) { return UNDEFINED; }
			return this[--this.length];
		};
	if (Array.prototype.push == null) // IE 5.x fix from Igor Poteryaev.
		Array.prototype.push = function() {
			for (var i = 0; i < arguments.length; ++i) { this[this.length] = arguments[i]; }
			return this.length;
		};

	TrimPath.parseTemplate = function(tmplContent, optTmplName, optEtc) {
		if (optEtc == null)
			optEtc = TrimPath.parseTemplate_etc;
		var funcSrc = parse(tmplContent, optTmplName, optEtc);
		var func = TrimPath.evalEx(funcSrc, optTmplName, 1);
		if (func != null)
			return new optEtc.Template(optTmplName, tmplContent, funcSrc, func, optEtc);
		return null;
	}

	try {
		String.prototype.process = function(context, optFlags) {
			var template = TrimPath.parseTemplate(this, null);
			if (template != null)
				return template.process(context, optFlags);
			return this;
		}
	} catch (e) { // Swallow exception, such as when String.prototype is sealed.
	}

	TrimPath.parseTemplate_etc = {};            // Exposed for extensibility.
	TrimPath.parseTemplate_etc.statementTag = "forelse|for|if|elseif|else|var|macro";
	TrimPath.parseTemplate_etc.statementDef = { // Lookup table for statement tags.
		"if": { delta: 1, prefix: "if (", suffix: ") {", paramMin: 1 },
		"else": { delta: 0, prefix: "} else {" },
		"elseif": { delta: 0, prefix: "} else if (", suffix: ") {", paramDefault: "true" },
		"/if": { delta: -1, prefix: "}" },
		"for": { delta: 1, paramMin: 3,
			prefixFunc: function(stmtParts, state, tmplName, etc) {
				if (stmtParts[2] != "in")
					throw new etc.ParseError(tmplName, state.line, "bad for loop statement: " + stmtParts.join(' '));
				var iterVar = stmtParts[1];
				var listVar = "__LIST__" + iterVar;
				return ["var ", listVar, " = ", stmtParts[3], ";",
				// Fix from Ross Shaull for hash looping, make sure that we have an array of loop lengths to treat like a stack.
                             "var __LENGTH_STACK__;",
                             "if (typeof(__LENGTH_STACK__) == 'undefined' || !__LENGTH_STACK__.length) __LENGTH_STACK__ = new Array();",
                             "__LENGTH_STACK__[__LENGTH_STACK__.length] = 0;", // Push a new for-loop onto the stack of loop lengths.
                             "if ((", listVar, ") != null) { ",
                             "var ", iterVar, "_ct = 0;",       // iterVar_ct variable, added by B. Bittman     
                             "for (var ", iterVar, "_index in ", listVar, ") { ",
                             iterVar, "_ct++;",
                             "if (typeof(", listVar, "[", iterVar, "_index]) == 'function') {continue;}", // IE 5.x fix from Igor Poteryaev.
                             "__LENGTH_STACK__[__LENGTH_STACK__.length - 1]++;",
                             "var ", iterVar, " = ", listVar, "[", iterVar, "_index];"].join("");
			} 
		},
		"forelse": { delta: 0, prefix: "} } if (__LENGTH_STACK__[__LENGTH_STACK__.length - 1] == 0) { if (", suffix: ") {", paramDefault: "true" },
		"/for": { delta: -1, prefix: "} }; delete __LENGTH_STACK__[__LENGTH_STACK__.length - 1];" }, // Remove the just-finished for-loop from the stack of loop lengths.
		"var": { delta: 0, prefix: "var ", suffix: ";" },
		"macro": { delta: 1,
			prefixFunc: function(stmtParts, state, tmplName, etc) {
				var macroName = stmtParts[1].split('(')[0];
				return ["var ", macroName, " = function",
                                   stmtParts.slice(1).join(' ').substring(macroName.length),
                                   "{ var _OUT_arr = []; var _OUT = { write: function(m) { if (m) _OUT_arr.push(m); } }; "].join('');
			} 
		},
		"/macro": { delta: -1, prefix: " return _OUT_arr.join(''); };" }
	}
	TrimPath.parseTemplate_etc.modifierDef = {
		"eat"		: function(v) { return ""; },
		"escape"	: function(s) { return String(s).replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;"); },
		"capitalize": function(s) { return String(s).toUpperCase(); },
		"default"	: function(s, d) { return (s != null && s != "null" && s != "") ? s : d; },

		"encode"	: function(s) { return String(s).replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/[\",\']/g,"&quot;"); },
		"decode"	: function(s) { return String(s).replace(/&amp;/g, "&").replace(/&nbsp;/g, " ").replace(/&lt;/g, "<").replace(/&gt;/g, ">").replace(/&quot;/g, '\"').replace(/<br>/g, "\n"); },
		"htmldecode": function(s) { return String(s).replace(/&amp;/g, "&").replace(/&nbsp;/g, " ").replace(/&lt;/g, "<").replace(/&gt;/g, ">").replace(/&quot;/g, '\"'); },
		"trimhtml"	: function(s) { return String(s).replace(/<\/?[^>]*>/g, "").replace(/[ | ]*\n/g, "\n").replace(/\n[\s| | ]*\r/g, "\n"); },

		"localedate": function(s) { return new Date(Date.parse(s)).toLocaleDateString(); },
		"localetime": function(s) { return new Date(Date.parse(s)).toLocaleTimeString(); },
		"shortdate"	: function(s) { var _s = new Date(Date.parse(s)); return _s.getMonth() + "-" + _s.getDay(); },

		"cutstring"	: function(s, l, d) { return splitString(s, l) + d },

		"sex"		: function(s) { return (s!=="0" && s!=null) ? "男" : "女"; }
	}
	

	TrimPath.parseTemplate_etc.modifierDef.h = TrimPath.parseTemplate_etc.modifierDef.escape;

	TrimPath.parseTemplate_etc.Template = function(tmplName, tmplContent, funcSrc, func, etc) {
		this.process = function(context, flags) {
			if (context == null)
				context = {};
			if (context._MODIFIERS == null)
				context._MODIFIERS = {};
			if (context.defined == null)
				context.defined = function(str) { return (context[str] != undefined); };
			for (var k in etc.modifierDef) {
				if (context._MODIFIERS[k] == null)
					context._MODIFIERS[k] = etc.modifierDef[k];
			}
			if (flags == null)
				flags = {};
			var resultArr = [];
			var resultOut = { write: function(m) { resultArr.push(m); } };
			try {
				func(resultOut, context, flags);
			} catch (e) {
				if (flags.throwExceptions == true)
					throw e;
				var result = new String(resultArr.join("") + "[ERROR: " + e.toString() + (e.message ? '; ' + e.message : '') + "]");
				result["exception"] = e;
				return result;
			}
			return resultArr.join("");
		}
		this.name = tmplName;
		this.source = tmplContent;
		this.sourceFunc = funcSrc;
		this.toString = function() { return "TrimPath.Template [" + tmplName + "]"; }
	}
	TrimPath.parseTemplate_etc.ParseError = function(name, line, message) {
		this.name = name;
		this.line = line;
		this.message = message;
	}
	TrimPath.parseTemplate_etc.ParseError.prototype.toString = function() {
		return ("TrimPath template ParseError in " + this.name + ": line " + this.line + ", " + this.message);
	}

	var parse = function(body, tmplName, etc) {
		body = cleanWhiteSpace(body);
		var funcText = ["var TrimPath_Template_TEMP = function(_OUT, _CONTEXT, _FLAGS) { with (_CONTEXT) {"];
		var state = { stack: [], line: 1 };                              // TODO: Fix line number counting.
		var endStmtPrev = -1;
		while (endStmtPrev + 1 < body.length) {
			var begStmt = endStmtPrev;
			// Scan until we find some statement markup.
			begStmt = body.indexOf("{", begStmt + 1);
			while (begStmt >= 0) {
				var endStmt = body.indexOf('}', begStmt + 1);
				var stmt = body.substring(begStmt, endStmt);
				var blockrx = stmt.match(/^\{(cdata|minify|eval)/); // From B. Bittman, minify/eval/cdata implementation.
				if (blockrx) {
					var blockType = blockrx[1];
					var blockMarkerBeg = begStmt + blockType.length + 1;
					var blockMarkerEnd = body.indexOf('}', blockMarkerBeg);
					if (blockMarkerEnd >= 0) {
						var blockMarker;
						if (blockMarkerEnd - blockMarkerBeg <= 0) {
							blockMarker = "{/" + blockType + "}";
						} else {
							blockMarker = body.substring(blockMarkerBeg + 1, blockMarkerEnd);
						}

						var blockEnd = body.indexOf(blockMarker, blockMarkerEnd + 1);
						if (blockEnd >= 0) {
							emitSectionText(body.substring(endStmtPrev + 1, begStmt), funcText);

							var blockText = body.substring(blockMarkerEnd + 1, blockEnd);
							if (blockType == 'cdata') {
								emitText(blockText, funcText);
							} else if (blockType == 'minify') {
								emitText(scrubWhiteSpace(blockText), funcText);
							} else if (blockType == 'eval') {
								if (blockText != null && blockText.length > 0) // From B. Bittman, eval should not execute until process().
									funcText.push('_OUT.write( (function() { ' + blockText + ' })() );');
							}
							begStmt = endStmtPrev = blockEnd + blockMarker.length - 1;
						}
					}
				} else if (body.charAt(begStmt - 1) != '$' &&               // Not an expression or backslashed,
                           body.charAt(begStmt - 1) != '\\') {              // so check if it is a statement tag.
					var offset = (body.charAt(begStmt + 1) == '/' ? 2 : 1); // Close tags offset of 2 skips '/'.
					// 10 is larger than maximum statement tag length.
					if (body.substring(begStmt + offset, begStmt + 10 + offset).search(TrimPath.parseTemplate_etc.statementTag) == 0)
						break;                                              // Found a match.
				}
				begStmt = body.indexOf("{", begStmt + 1);
			}
			if (begStmt < 0)                              // In "a{for}c", begStmt will be 1.
				break;
			var endStmt = body.indexOf("}", begStmt + 1); // In "a{for}c", endStmt will be 5.
			if (endStmt < 0)
				break;
			emitSectionText(body.substring(endStmtPrev + 1, begStmt), funcText);
			emitStatement(body.substring(begStmt, endStmt + 1), state, funcText, tmplName, etc);
			endStmtPrev = endStmt;
		}
		emitSectionText(body.substring(endStmtPrev + 1), funcText);
		if (state.stack.length != 0)
			throw new etc.ParseError(tmplName, state.line, "unclosed, unmatched statement(s): " + state.stack.join(","));
		funcText.push("}}; TrimPath_Template_TEMP");
		return funcText.join("");
	}

	var emitStatement = function(stmtStr, state, funcText, tmplName, etc) {
		var parts = stmtStr.slice(1, -1).split(' ');
		var stmt = etc.statementDef[parts[0]]; // Here, parts[0] == for/if/else/...
		if (stmt == null) {                    // Not a real statement.
			emitSectionText(stmtStr, funcText);
			return;
		}
		if (stmt.delta < 0) {
			if (state.stack.length <= 0)
				throw new etc.ParseError(tmplName, state.line, "close tag does not match any previous statement: " + stmtStr);
			state.stack.pop();
		}
		if (stmt.delta > 0)
			state.stack.push(stmtStr);

		if (stmt.paramMin != null &&
            stmt.paramMin >= parts.length)
			throw new etc.ParseError(tmplName, state.line, "statement needs more parameters: " + stmtStr);
		if (stmt.prefixFunc != null)
			funcText.push(stmt.prefixFunc(parts, state, tmplName, etc));
		else
			funcText.push(stmt.prefix);
		if (stmt.suffix != null) {
			if (parts.length <= 1) {
				if (stmt.paramDefault != null)
					funcText.push(stmt.paramDefault);
			} else {
				for (var i = 1; i < parts.length; i++) {
					if (i > 1)
						funcText.push(' ');
					funcText.push(parts[i]);
				}
			}
			funcText.push(stmt.suffix);
		}
	}

	var emitSectionText = function(text, funcText) {
		if (text.length <= 0)
			return;
		var nlPrefix = 0;               // Index to first non-newline in prefix.
		var nlSuffix = text.length - 1; // Index to first non-space/tab in suffix.
		while (nlPrefix < text.length && (text.charAt(nlPrefix) == '\n'))
			nlPrefix++;
		while (nlSuffix >= 0 && (text.charAt(nlSuffix) == ' ' || text.charAt(nlSuffix) == '\t'))
			nlSuffix--;
		if (nlSuffix < nlPrefix)
			nlSuffix = nlPrefix;
		if (nlPrefix > 0) {
			funcText.push('if (_FLAGS.keepWhitespace == true) _OUT.write("');
			var s = text.substring(0, nlPrefix).replace('\n', '\\n'); // A macro IE fix from BJessen.
			if (s.charAt(s.length - 1) == '\n')
				s = s.substring(0, s.length - 1);
			funcText.push(s);
			funcText.push('");');
		}
		var lines = text.substring(nlPrefix, nlSuffix + 1).split('\n');
		for (var i = 0; i < lines.length; i++) {
			emitSectionTextLine(lines[i], funcText);
			if (i < lines.length - 1)
				funcText.push('_OUT.write("\\n");\n');
		}
		if (nlSuffix + 1 < text.length) {
			funcText.push('if (_FLAGS.keepWhitespace == true) _OUT.write("');
			var s = text.substring(nlSuffix + 1).replace('\n', '\\n');
			if (s.charAt(s.length - 1) == '\n')
				s = s.substring(0, s.length - 1);
			funcText.push(s);
			funcText.push('");');
		}
	}

	var emitSectionTextLine = function(line, funcText) {
		var endMarkPrev = '}';
		var endExprPrev = -1;
		while (endExprPrev + endMarkPrev.length < line.length) {
			var begMark = "${", endMark = "}";
			var begExpr = line.indexOf(begMark, endExprPrev + endMarkPrev.length); // In "a${b}c", begExpr == 1
			if (begExpr < 0)
				break;
			if (line.charAt(begExpr + 2) == '%') {
				begMark = "${%";
				endMark = "%}";
			}
			var endExpr = line.indexOf(endMark, begExpr + begMark.length);         // In "a${b}c", endExpr == 4;
			if (endExpr < 0)
				break;
			emitText(line.substring(endExprPrev + endMarkPrev.length, begExpr), funcText);
			// Example: exprs == 'firstName|default:"John Doe"|capitalize'.split('|')
			var exprArr = line.substring(begExpr + begMark.length, endExpr).replace(/\|\|/g, "#@@#").split('|');
			for (var k in exprArr) {
				if (exprArr[k].replace) // IE 5.x fix from Igor Poteryaev.
					exprArr[k] = exprArr[k].replace(/#@@#/g, '||');
			}
			funcText.push('_OUT.write(');
			emitExpression(exprArr, exprArr.length - 1, funcText);
			funcText.push(');');
			endExprPrev = endExpr;
			endMarkPrev = endMark;
		}
		emitText(line.substring(endExprPrev + endMarkPrev.length), funcText);
	}

	var emitText = function(text, funcText) {
		if (text == null ||
            text.length <= 0)
			return;
		text = text.replace(/\\/g, '\\\\');
		text = text.replace(/\n/g, '\\n');
		text = text.replace(/"/g, '\\"');
		funcText.push('_OUT.write("');
		funcText.push(text);
		funcText.push('");');
	}

	var emitExpression = function(exprArr, index, funcText) {
		// Ex: foo|a:x|b:y1,y2|c:z1,z2 is emitted as c(b(a(foo,x),y1,y2),z1,z2)
		var expr = exprArr[index]; // Ex: exprArr == [firstName,capitalize,default:"John Doe"]
		if (index <= 0) {          // Ex: expr    == 'default:"John Doe"'
			funcText.push(expr);
			return;
		}
		var parts = expr.split(':');
		funcText.push('_MODIFIERS["');
		funcText.push(parts[0]); // The parts[0] is a modifier function name, like capitalize.
		funcText.push('"](');
		emitExpression(exprArr, index - 1, funcText);
		if (parts.length > 1) {
			funcText.push(',');
			funcText.push(parts[1]);
		}
		funcText.push(')');
	}

	var cleanWhiteSpace = function(result) {
		result = result.replace(/\t/g, "    ");
		result = result.replace(/\r\n/g, "\n");
		result = result.replace(/\r/g, "\n");
		result = result.replace(/^(\s*\S*(\s+\S+)*)\s*$/, '$1'); // Right trim by Igor Poteryaev.
		return result;
	}

	var scrubWhiteSpace = function(result) {
		result = result.replace(/^\s+/g, "");
		result = result.replace(/\s+$/g, "");
		result = result.replace(/\s+/g, " ");
		result = result.replace(/^(\s*\S*(\s+\S+)*)\s*$/, '$1'); // Right trim by Igor Poteryaev.
		return result;
	}

	// The DOM helper functions depend on DOM/DHTML, so they only work in a browser.
	// However, these are not considered core to the engine.
	//
	TrimPath.parseDOMTemplate = function(elementId, optDocument, optEtc) {
		if (optDocument == null)
			optDocument = document;
		var element = optDocument.getElementById(elementId);
		var content = element.value;     // Like textarea.value.
		if (content == null)
			content = element.innerHTML; // Like textarea.innerHTML.
		content = content.replace(/&lt;/g, "<").replace(/&gt;/g, ">");
		return TrimPath.parseTemplate(content, elementId, optEtc);
	}

	TrimPath.processDOMTemplate = function(elementId, context, optFlags, optDocument, optEtc) {
		return TrimPath.parseDOMTemplate(elementId, optDocument, optEtc).process(context, optFlags);
	}
})();