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Diffstat (limited to 'trunk/infrastructure/framework-src/modules/ejs.js')
| -rw-r--r-- | trunk/infrastructure/framework-src/modules/ejs.js | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/trunk/infrastructure/framework-src/modules/ejs.js b/trunk/infrastructure/framework-src/modules/ejs.js new file mode 100644 index 0000000..bf14ed3 --- /dev/null +++ b/trunk/infrastructure/framework-src/modules/ejs.js @@ -0,0 +1,471 @@ +/*-------------------------------------------------------------------------- + * EJS - Embedded JavaScript, version 0.1.0 + * Copyright (c) 2007 Edward Benson + * http://www.edwardbenson.com/projects/ejs + * ------------------------------------------------------------------------ + * + * EJS is freely distributable under the terms of an MIT-style license. + * + * EJS is a client-side preprocessing engine written in and for JavaScript. + * If you have used PHP, ASP, JSP, or ERB then you get the idea: code embedded + * in <% // Code here %> tags will be executed, and code embedded in <%= .. %> + * tags will be evaluated and appended to the output. + * + * This is essentially a direct JavaScript port of Masatoshi Seki's erb.rb + * from the Ruby Core, though it contains a subset of ERB's functionality. + * + * Requirements: + * prototype.js + * + * Usage: + * // source should be either a string or a DOM node whose innerHTML + * // contains EJB source. + * var source = "<% var ejb="EJB"; %><h1>Hello, <%= ejb %>!</h1>"; + * var compiler = new EjsCompiler(source); + * compiler.compile(); + * var output = eval(compiler.out); + * alert(output); // -> "<h1>Hello, EJB!</h1>" + * + * For a demo: see demo.html + * For the license: see license.txt + * + *--------------------------------------------------------------------------*/ + +import("jsutils.*"); +import("funhtml"); + +jimport("java.lang.System.out.println"); +jimport("net.appjet.ajstdlib.execution.executeCodeInNewScope"); + +/* Make a split function like Ruby's: "abc".split(/b/) -> ['a', 'b', 'c'] */ +function rsplit(x, regex) { + var item = x; + var result = regex.exec(item); + var retArr = new Array(); + while (result != null) + { + var first_idx = result.index; + var last_idx = regex.lastIndex; + if ((first_idx) != 0) + { + var first_bit = item.substring(0,first_idx); + retArr.push(item.substring(0,first_idx)); + item = item.slice(first_idx); + } + retArr.push(result[0]); + item = item.slice(result[0].length); + result = regex.exec(item); + } + if (! item == '') + { + retArr.push(item); + } + return retArr; +}; + +/* Chop is nice to have too */ +function chop(x) { + return x.substr(0, x.length - 1); +} + +/* Adaptation from the Scanner of erb.rb */ +var EjsScanner = function(source, left, right) { + this.left_delimiter = left +'%'; //<% + this.right_delimiter = '%'+right; //> + this.double_left = left+'%%'; + this.double_right = '%%'+right; + this.left_equal = left+'%='; + this.left_comment = left+'%#'; + if(left=='[') { + this.SplitRegexp = /(\[%%)|(%%\])|(\[%=)|(\[%#)|(\[%)|(%\]\n)|(%\])|(\n)/; + } + else { + this.SplitRegexp = new RegExp('('+this.double_left+')|(%%'+this.double_right+')|('+this.left_equal+')|('+this.left_comment+')|('+this.left_delimiter+')|('+this.right_delimiter+'\n)|('+this.right_delimiter+')|(\n)') + } + + this.source = source; + this.stag = null; + this.lines = 0; +}; +EjsView = function(data) { + this.data = data; +}; +EjsView.prototype.partial = function(options, data){ + if(!data) data = this.data; + return new EJS(options).render(data); +}; + +EjsScanner.to_text = function(input){ + if(input == null || input === undefined) + return ''; + if(input instanceof Date) + return input.toDateString(); + if(input.toString) + return input.toString(); + return ''; +} + +EjsScanner.prototype = { + + /* For each line, scan! */ + scan: function(block) { + scanline = this.scanline; + regex = this.SplitRegexp; + if (! this.source == '') + { + var source_split = rsplit(this.source, /\n/); + for(var i=0; i<source_split.length; i++) { + var item = source_split[i]; + this.scanline(item, regex, block); + } + } + }, + + /* For each token, block! */ + scanline: function(line, regex, block) { + this.lines++; + var line_split = rsplit(line, regex); + for(var i=0; i<line_split.length; i++) { + var token = line_split[i]; + if (token != null) { + try{ + block(token, this); + }catch(e){ + throw {type: 'EjsScanner', line: this.lines}; + } + } + } + } +}; + +/* Adaptation from the Buffer of erb.rb */ +var EjsBuffer = function(pre_cmd, post_cmd) { + this.line = new Array(); + this.script = ""; + this.pre_cmd = pre_cmd; + this.post_cmd = post_cmd; + + for (var i=0; i<this.pre_cmd.length; i++) + { + this.push(pre_cmd[i]); + } +} +EjsBuffer.prototype = { + + push: function(cmd) { + this.line.push(cmd); + }, + + cr: function() { + this.script = this.script + this.line.join('; '); + this.line = new Array(); + this.script = this.script + "\n"; + }, + + close: function() { + if (this.line.length > 0) + { + for (var i=0; i<this.post_cmd.length; i++) + { + this.push(pre_cmd[i]); + } + this.script = this.script + this.line.join('; '); + line = null; + } + } + +}; + +/* Adaptation from the Compiler of erb.rb */ +EjsCompiler = function(source, left) { + this.pre_cmd = ['var ___ejsO = "";']; + this.post_cmd = new Array(); + this.source = ' '; + if (source != null) + { + if (typeof source == 'string') + { + source = source.replace(/\r\n/g, "\n"); + source = source.replace(/\r/g, "\n"); + this.source = source; + } + else if (source.innerHTML) + { + this.source = source.innerHTML; + } + if (typeof this.source != 'string') + { + this.source = ""; + } + } + left = left || '<' + var right = '>' + switch(left) { + case '[': + right = ']' + break; + case '<': + break; + default: + throw left+' is not a supported deliminator' + break; + } + this.scanner = new EjsScanner(this.source, left, right); + this.out = ''; +} +EjsCompiler.prototype = { + compile: function(options) { + options = options || {}; + this.out = ''; + var put_cmd = "___ejsO += "; + var insert_cmd = put_cmd; + var buff = new EjsBuffer(this.pre_cmd, this.post_cmd); + var content = ''; + var clean = function(content) + { + content = content.replace(/\\/g, '\\\\'); + content = content.replace(/\n/g, '\\n'); + content = content.replace(/\"/g, '\\"'); + return content; + }; + this.scanner.scan(function(token, scanner) { + if (scanner.stag == null) + { + //alert(token+'|'+(token == "\n")) + switch(token) { + case '\n': + content = content + "\n"; + buff.push(put_cmd + '"' + clean(content) + '";'); + buff.cr(); + content = ''; + break; + case scanner.left_delimiter: + case scanner.left_equal: + case scanner.left_comment: + scanner.stag = token; + if (content.length > 0) + { + // Chould be content.dump in Ruby + + buff.push(put_cmd + '"' + clean(content) + '"'); + } + content = ''; + break; + case scanner.double_left: + content = content + scanner.left_delimiter; + break; + default: + content = content + token; + break; + } + } + else { + switch(token) { + case scanner.right_delimiter: + switch(scanner.stag) { + case scanner.left_delimiter: + if (content[content.length - 1] == '\n') + { + content = chop(content); + buff.push(content); + buff.cr(); + } + else { + buff.push(content); + } + break; + case scanner.left_equal: + buff.push(insert_cmd + "(EjsScanner.to_text(" + content + "))"); + break; + } + scanner.stag = null; + content = ''; + break; + case scanner.double_right: + content = content + scanner.right_delimiter; + break; + default: + content = content + token; + break; + } + } + }); + if (content.length > 0) + { + // Chould be content.dump in Ruby + buff.push(put_cmd + '"' + clean(content) + '"'); + } + buff.close(); + this.out = buff.script + ";"; + var to_be_evaled = [ + 'var process = function(_CONTEXT,_VIEW) {', + ' with(_VIEW) {', + ' with (_CONTEXT) {', + this.out, + ' return ___ejsO;', + ' }', + ' }', + '};' + ].join(''); + // make funhtml.* available in parent scope. + var parentScope = {}; + parentScope.EjsScanner = EjsScanner; + keys(funhtml).forEach(function(k) { + parentScope[k] = funhtml[k]; + }); + var ret = executeCodeInNewScope( + parentScope, + to_be_evaled, + (options.name || "template"), + 1 + ); + this.process = ret.process; + } +} + + +//type, cache, folder +EJS = function( options ){ + this.set_options(options); + + if(options.url){ + var template = EJS.get(options.url, this.cache); + if (template) return template; + if (template == EJS.INVALID_PATH) return null; + this.text = EJS.request(options.url); + if(this.text == null){ + //EJS.update(options.url, this.INVALID_PATH); + throw 'There is no template at '+options.url; + } + this.name = options.url; + }else if(options.element) + { + if(typeof options.element == 'string'){ + var name = options.element; + options.element = document.getElementById( options.element ); + if(options.element == null) throw name+'does not exist!'; + } + if(options.element.value){ + this.text = options.element.value; + }else{ + this.text = options.element.innerHTML; + } + this.name = options.element.id; + this.type = '['; + } + var template = new EjsCompiler(this.text, this.type); + + template.compile(options); + + + EJS.update(this.name, this); + this.template = template; +}; +EJS.config = function(options){ + EJS.cache = options.cache != null ? options.cache : EJS.cache; + EJS.type = options.type != null ? options.type : EJS.type; + var templates_directory = {}; //nice and private container + + EJS.get = function(path, cache){ + if(cache == false) return null; + if(templates_directory[path]) return templates_directory[path]; + return null; + }; + + EJS.update = function(path, template) { + if(path == null) return; + templates_directory[path] = template; + }; + + EJS.INVALID_PATH = -1; + + +}; +EJS.config( {cache: true, type: '<' } ); + +EJS.prototype = { + render : function(object){ + var v = new EjsView(object); + return this.template.process.call(v, object, v); + }, + out : function(){ + return this.template.out; + }, + set_options : function(options){ + this.type = options.type != null ? options.type : EJS.type; + this.cache = options.cache != null ? options.cache : EJS.cache; + this.text = options.text != null ? options.text : null; + this.name = options.name != null ? options.name : null; + }, + // called without options, returns a function that takes the object + // called with options being a string, uses that as a url + // called with options as an object + update : function(element, options){ + if(typeof element == 'string'){ + element = document.getElementById(element); + } + if(options == null){ + _template = this; + return function(object){ + EJS.prototype.update.call(_template, element, object); + }; + } + if(typeof options == 'string'){ + params = {}; + params.url = options; + _template = this; + params.onComplete = function(request){ + var object = eval( request.responseText ); + EJS.prototype.update.call(_template, element, object); + }; + EJS.ajax_request(params); + }else + { + element.innerHTML = this.render(options); + } + } +}; + + EJS.newRequest = function(){ + var factories = [function() { return new ActiveXObject("Msxml2.XMLHTTP"); },function() { return new XMLHttpRequest(); },function() { return new ActiveXObject("Microsoft.XMLHTTP"); }]; + for(var i = 0; i < factories.length; i++) { + try { + var request = factories[i](); + if (request != null) return request; + } + catch(e) { continue;} + } + }; + + EJS.request = function(path){ + var request = new EJS.newRequest(); + request.open("GET", path, false); + + try{request.send(null);} + catch(e){return null;} + + if ( request.status == 404 || request.status == 2 ||(request.status == 0 && request.responseText == '') ) return null; + + return request.responseText + }; + EJS.ajax_request = function(params){ + params.method = ( params.method ? params.method : 'GET'); + + var request = new EJS.newRequest(); + request.onreadystatechange = function(){ + if(request.readyState == 4){ + if(request.status == 200){ + params.onComplete(request); + }else + { + params.onComplete(request); + } + } + }; + request.open(params.method, params.url); + request.send(null); + }; + +//} + + |