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source: Dev/trunk/src/client/dojox/dtl/dom.js @ 529

Last change on this file since 529 was 483, checked in by hendrikvanantwerpen, 11 years ago
Added Dojo 1.9.3 release.
Property svn:executable set to ``*
File size: 28.9 KB

Line
1	define([
2	"dojo/_base/lang",
3	"./_base",
4	"dojox/string/tokenize",
5	"./Context",
6	"dojo/dom",
7	"dojo/dom-construct",
8	"dojo/_base/html",
9	"dojo/_base/array",
10	"dojo/_base/connect",
11	"dojo/_base/sniff"
12	], function(lang,dd,Tokenize,context,dom,domconstruct,html,array,connect,has){
13
14	dd.BOOLS = {checked: 1, disabled: 1, readonly: 1};
15	dd.TOKEN_CHANGE = -11;
16	dd.TOKEN_ATTR = -12;
17	dd.TOKEN_CUSTOM = -13;
18	dd.TOKEN_NODE = 1;
19
20	var ddt = dd.text;
21	var ddh = dd.dom = {
22	_attributes: {},
23	_uppers: {},
24	_re4: /^function anonymous\(\)\s{\s(.)\s}$/,
25	_reTrim: /(?:^[\n\s](\{%)?\s\|\s(%\})?[\n\s]$)/g,
26	_reSplit: /\s%\}[\n\s]\{%\s*/g,
27	getTemplate: function(text){
28	if(typeof this._commentable == "undefined"){
29	// Check to see if the browser can handle comments
30	this._commentable = false;
31	var div = document.createElement("div"), comment = "Test comment handling, and long comments, using comments whenever possible.";
32	div.innerHTML = "<!--" + comment + "-->";
33	if(div.childNodes.length && div.firstChild.nodeType == 8 && div.firstChild.data == comment){
34	this._commentable = true;
35	}
36	}
37
38	if(!this._commentable){
39	// Strip comments
40	text = text.replace(/<!--({({\|%).*?(%\|})})-->/g, "$1");
41	}
42
43	if(has("ie")){
44	text = text.replace(/\b(checked\|disabled\|readonly\|style)="/g, 't$1="');
45	}
46	text = text.replace(/\bstyle="/g, 'tstyle="');
47
48	var match;
49	var table = has("webkit");
50	var pairs = [ // Format: [enable, parent, allowed children (first for nesting), nestings]
51	[true, "select", "option"],
52	[table, "tr", "td\|th"],
53	[table, "thead", "tr", "th"],
54	[table, "tbody", "tr", "td"],
55	[table, "table", "tbody\|thead\|tr", "tr", "td"]
56	];
57	var replacements = [];
58	// Some tags can't contain text. So we wrap the text in tags that they can have.
59	for(var i = 0, pair; pair = pairs[i]; i++){
60	if(!pair[0]){
61	continue;
62	}
63	if(text.indexOf("<" + pair[1]) != -1){
64	var selectRe = new RegExp("<" + pair[1] + "(?:.\|\n)*?>((?:.\|\n)+?)</" + pair[1] + ">", "ig");
65	tagLoop: while(match = selectRe.exec(text)){
66	// Do it like this to make sure we don't double-wrap
67	var inners = pair[2].split("\|");
68	var innerRe = [];
69	for(var j = 0, inner; inner = inners[j]; j++){
70	innerRe.push("<" + inner + "(?:.\|\n)?>(?:.\|\n)?</" + inner + ">");
71	}
72	var tags = [];
73	var tokens = Tokenize(match[1], new RegExp("(" + innerRe.join("\|") + ")", "ig"), function(data){
74	var tag = /<(\w+)/.exec(data)[1];
75	if(!tags[tag]){
76	tags[tag] = true;
77	tags.push(tag);
78	}
79	return {data: data};
80	});
81	if(tags.length){
82	var tag = (tags.length == 1) ? tags[0] : pair[2].split("\|")[0];
83
84	var replace = [];
85	for(var j = 0, jl = tokens.length; j < jl; j++) {
86	var token = tokens[j];
87	if(lang.isObject(token)){
88	replace.push(token.data);
89	}else{
90	var stripped = token.replace(this._reTrim, "");
91	if(!stripped){ continue; }
92	token = stripped.split(this._reSplit);
93	for(var k = 0, kl = token.length; k < kl; k++){
94	var replacement = "";
95	for(var p = 2, pl = pair.length; p < pl; p++){
96	if(p == 2){
97	replacement += "<" + tag + ' dtlinstruction="{% ' + token[k].replace('"', '\\"') + ' %}">';
98	}else if(tag == pair[p]) {
99	continue;
100	}else{
101	replacement += "<" + pair[p] + ">";
102	}
103	}
104	replacement += "DTL";
105	for(var p = pair.length - 1; p > 1; p--){
106	if(p == 2){
107	replacement += "</" + tag + ">";
108	}else if(tag == pair[p]) {
109	continue;
110	}else{
111	replacement += "</" + pair[p] + ">";
112	}
113	}
114	replace.push("\xFF" + replacements.length);
115	replacements.push(replacement);
116	}
117	}
118	}
119	text = text.replace(match[1], replace.join(""));
120	}
121	}
122	}
123	}
124
125	for(var i = replacements.length; i--;){
126	text = text.replace("\xFF" + i, replacements[i]);
127	}
128
129	var re = /\b([a-zA-Z_:][a-zA-Z0-9_\-\.:]*)=['"]/g;
130	while(match = re.exec(text)){
131	var lower = match[1].toLowerCase();
132	if(lower == "dtlinstruction"){ continue; }
133	if(lower != match[1]){
134	this._uppers[lower] = match[1];
135	}
136	this._attributes[lower] = true;
137	}
138	var div = document.createElement("div");
139	div.innerHTML = text;
140	var output = {nodes: []};
141	while(div.childNodes.length){
142	output.nodes.push(div.removeChild(div.childNodes[0]))
143	}
144
145	return output;
146	},
147	tokenize: function(/Node/ nodes){
148	var tokens = [];
149
150	for(var i = 0, node; node = nodes[i++];){
151	if(node.nodeType != 1){
152	this.__tokenize(node, tokens);
153	}else{
154	this._tokenize(node, tokens);
155	}
156	}
157
158	return tokens;
159	},
160	_swallowed: [],
161	_tokenize: function(/Node/ node, /Array/ tokens){
162	var first = false;
163	var swallowed = this._swallowed;
164	var i, j, tag, child;
165
166	if(!tokens.first){
167	// Try to efficiently associate tags that use an attribute to
168	// remove the node from DOM (eg dojoType) so that we can efficiently
169	// locate them later in the tokenizing.
170	first = tokens.first = true;
171	var tags = dd.register.getAttributeTags();
172	for(i = 0; tag = tags[i]; i++){
173	try{
174	(tag[2])({ swallowNode: function(){ throw 1; }}, new dd.Token(dd.TOKEN_ATTR, ""));
175	}catch(e){
176	swallowed.push(tag);
177	}
178	}
179	}
180
181	for(i = 0; tag = swallowed[i]; i++){
182	var text = node.getAttribute(tag[0]);
183	if(text){
184	var swallowed = false;
185	var custom = (tag[2])({ swallowNode: function(){ swallowed = true; return node; }}, new dd.Token(dd.TOKEN_ATTR, tag[0] + " " + text));
186	if(swallowed){
187	if(node.parentNode && node.parentNode.removeChild){
188	node.parentNode.removeChild(node);
189	}
190	tokens.push([dd.TOKEN_CUSTOM, custom]);
191	return;
192	}
193	}
194	}
195
196	var children = [];
197	if(has("ie") && node.tagName == "SCRIPT"){
198	children.push({
199	nodeType: 3,
200	data: node.text
201	});
202	node.text = "";
203	}else{
204	for(i = 0; child = node.childNodes[i]; i++){
205	children.push(child);
206	}
207	}
208
209	tokens.push([dd.TOKEN_NODE, node]);
210
211	var change = false;
212	if(children.length){
213	// Only do a change request if we need to
214	tokens.push([dd.TOKEN_CHANGE, node]);
215	change = true;
216	}
217
218	for(var key in this._attributes){
219	var clear = false;
220
221	var value = "";
222	if(key == "class"){
223	value = node.className \|\| value;
224	}else if(key == "for"){
225	value = node.htmlFor \|\| value;
226	}else if(key == "value" && node.value == node.innerHTML){
227	// Sometimes .value is set the same as the contents of the item (button)
228	continue;
229	}else if(node.getAttribute){
230	value = node.getAttribute(key, 2) \|\| value;
231	if(key == "href" \|\| key == "src"){
232	if(has("ie")){
233	var hash = location.href.lastIndexOf(location.hash);
234	var href = location.href.substring(0, hash).split("/");
235	href.pop();
236	href = href.join("/") + "/";
237	if(value.indexOf(href) == 0){
238	value = value.replace(href, "");
239	}
240	value = decodeURIComponent(value);
241	}
242	}else if(key == "tstyle"){
243	clear = key; // Placeholder because we can't use style
244	key = "style";
245	}else if(dd.BOOLS[key.slice(1)] && lang.trim(value)){
246	key = key.slice(1);
247	}else if(this._uppers[key] && lang.trim(value)){
248	clear = this._uppers[key]; // Replaced by lowercase
249	}
250	}
251
252	if(clear){
253	// Clear out values that are different than will
254	// be used in plugins
255	node.setAttribute(clear, "");
256	node.removeAttribute(clear);
257	}
258
259	if(typeof value == "function"){
260	value = value.toString().replace(this._re4, "$1");
261	}
262
263	if(!change){
264	// Only do a change request if we need to
265	tokens.push([dd.TOKEN_CHANGE, node]);
266	change = true;
267	}
268
269	// We'll have to resolve attributes during parsing (some ref plugins)
270
271	tokens.push([dd.TOKEN_ATTR, node, key, value]);
272	}
273
274	for(i = 0, child; child = children[i]; i++){
275	if(child.nodeType == 1){
276	var instruction = child.getAttribute("dtlinstruction");
277	if(instruction){
278	child.parentNode.removeChild(child);
279	child = {
280	nodeType: 8,
281	data: instruction
282	};
283	}
284	}
285	this.__tokenize(child, tokens);
286	}
287
288	if(!first && node.parentNode && node.parentNode.tagName){
289	if(change){
290	tokens.push([dd.TOKEN_CHANGE, node, true]);
291	}
292	tokens.push([dd.TOKEN_CHANGE, node.parentNode]);
293	node.parentNode.removeChild(node);
294	}else{
295	// If this node is parentless, it's a base node, so we have to "up" change to itself
296	// and note that it's a top-level to watch for errors
297	tokens.push([dd.TOKEN_CHANGE, node, true, true]);
298	}
299	},
300	__tokenize: function(child, tokens){
301	var data = child.data;
302	switch(child.nodeType){
303	case 1:
304	this._tokenize(child, tokens);
305	return;
306	case 3:
307	if(data.match(/[^\s\n]/) && (data.indexOf("{{") != -1 \|\| data.indexOf("{%") != -1)){
308	var texts = ddt.tokenize(data);
309	for(var j = 0, text; text = texts[j]; j++){
310	if(typeof text == "string"){
311	tokens.push([dd.TOKEN_TEXT, text]);
312	}else{
313	tokens.push(text);
314	}
315	}
316	}else{
317	tokens.push([child.nodeType, child]);
318	}
319	if(child.parentNode) child.parentNode.removeChild(child);
320	return;
321	case 8:
322	if(data.indexOf("{%") == 0){
323	var text = lang.trim(data.slice(2, -2));
324	if(text.substr(0, 5) == "load "){
325	var parts = lang.trim(text).split(/\s+/g);
326	for(var i = 1, part; part = parts[i]; i++){
327	if (/\./.test(part)){
328	part = part.replace(/\./g,"/");
329	}
330	require([part]);
331	}
332	}
333	tokens.push([dd.TOKEN_BLOCK, text]);
334	}
335	if(data.indexOf("{{") == 0){
336	tokens.push([dd.TOKEN_VAR, lang.trim(data.slice(2, -2))]);
337	}
338	if(child.parentNode) child.parentNode.removeChild(child);
339	return;
340	}
341	}
342	};
343
344	dd.DomTemplate = lang.extend(function(/String\|DOMNode\|dojo/Url/ obj){
345	// summary:
346	// The template class for DOM templating.
347	if(!obj.nodes){
348	var node = dom.byId(obj);
349	if(node && node.nodeType == 1){
350	array.forEach(["class", "src", "href", "name", "value"], function(item){
351	ddh._attributes[item] = true;
352	});
353	obj = {
354	nodes: [node]
355	};
356	}else{
357	if(typeof obj == "object"){
358	obj = ddt.getTemplateString(obj);
359	}
360	obj = ddh.getTemplate(obj);
361	}
362	}
363
364	var tokens = ddh.tokenize(obj.nodes);
365	if(dd.tests){
366	this.tokens = tokens.slice(0);
367	}
368
369	var parser = new dd._DomParser(tokens);
370	this.nodelist = parser.parse();
371	},
372	{
373	_count: 0,
374	_re: /\bdojo:([a-zA-Z0-9_]+)\b/g,
375	setClass: function(/String/str){
376	// summary:
377	// Sets the specified class name on the root node.
378	this.getRootNode().className = str;
379	},
380	getRootNode: function(){
381	// summary:
382	// Returns the template root node.
383	return this.buffer.rootNode;
384	},
385	getBuffer: function(){
386	// summary:
387	// Returns a new buffer.
388	return new dd.DomBuffer();
389	},
390	render: function(/dojox/dtl/Context?/context, /concatenable?/buffer){
391	// summary:
392	// Renders this template.
393	buffer = this.buffer = buffer \|\| this.getBuffer();
394	this.rootNode = null;
395	var output = this.nodelist.render(context \|\| new dd.Context({}), buffer);
396	for(var i = 0, node; node = buffer._cache[i]; i++){
397	if(node._cache){
398	node._cache.length = 0;
399	}
400	}
401	return output;
402	},
403	unrender: function(context, buffer){
404	return this.nodelist.unrender(context, buffer);
405	}
406	});
407
408	dd.DomBuffer = lang.extend(function(/Node/ parent){
409	// summary:
410	// Allows the manipulation of DOM
411	// description:
412	// Use this to append a child, change the parent, or
413	// change the attribute of the current node.
414	// parent:
415	// The parent node.
416	this._parent = parent;
417	this._cache = [];
418	},
419	{
420	concat: function(/DOMNode/ node){
421	var parent = this._parent;
422	if(parent && node.parentNode && node.parentNode === parent && !parent._dirty){
423	return this;
424	}
425
426	if(node.nodeType == 1 && !this.rootNode){
427	this.rootNode = node \|\| true;
428	return this;
429	}
430
431	if(!parent){
432	if(node.nodeType == 3 && lang.trim(node.data)){
433	throw new Error("Text should not exist outside of the root node in template");
434	}
435	return this;
436	}
437	if(this._closed){
438	if(node.nodeType == 3 && !lang.trim(node.data)){
439	return this;
440	}else{
441	throw new Error("Content should not exist outside of the root node in template");
442	}
443	}
444	if(parent._dirty){
445	if(node._drawn && node.parentNode == parent){
446	var caches = parent._cache;
447	if(caches){
448	for(var i = 0, cache; cache = caches[i]; i++){
449	this.onAddNode && this.onAddNode(cache);
450	parent.insertBefore(cache, node);
451	this.onAddNodeComplete && this.onAddNodeComplete(cache);
452	}
453	caches.length = 0;
454	}
455	}
456	parent._dirty = false;
457	}
458	if(!parent._cache){
459	parent._cache = [];
460	this._cache.push(parent);
461	}
462	parent._dirty = true;
463	parent._cache.push(node);
464	return this;
465	},
466	remove: function(/String\|DomNode/obj){
467	if(typeof obj == "string"){
468	if(this._parent){
469	this._parent.removeAttribute(obj);
470	}
471	}else{
472	if(obj.nodeType == 1 && !this.getRootNode() && !this._removed){
473	this._removed = true;
474	return this;
475	}
476	if(obj.parentNode){
477	this.onRemoveNode && this.onRemoveNode(obj);
478	if(obj.parentNode){
479	obj.parentNode.removeChild(obj);
480	}
481	}
482	}
483	return this;
484	},
485	setAttribute: function(key, value){
486	var old = html.attr(this._parent, key);
487	if(this.onChangeAttribute && old != value){
488	this.onChangeAttribute(this._parent, key, old, value);
489	}
490	if(key == "style"){
491	//console.log(value);
492	this._parent.style.cssText = value;
493	}else{
494	html.attr(this._parent, key, value);
495	//console.log(this._parent, key, value);
496	if(key == "value"){
497	this._parent.setAttribute(key, value);
498	}
499	}
500	return this;
501	},
502	addEvent: function(context, type, fn, /Array\|Function/ args){
503	if(!context.getThis()){ throw new Error("You must use Context.setObject(instance)"); }
504	this.onAddEvent && this.onAddEvent(this.getParent(), type, fn);
505	var resolved = fn;
506	if(lang.isArray(args)){
507	resolved = function(e){
508	this[fn].apply(this, [e].concat(args));
509	}
510	}
511	return connect.connect(this.getParent(), type, context.getThis(), resolved);
512	},
513	setParent: function(node, /Boolean?/ up, /Boolean?/ root){
514	if(!this._parent) this._parent = this._first = node;
515
516	if(up && root && node === this._first){
517	this._closed = true;
518	}
519
520	if(up){
521	var parent = this._parent;
522	var script = "";
523	var ie = has("ie") && parent.tagName == "SCRIPT";
524	if(ie){
525	parent.text = "";
526	}
527	if(parent._dirty){
528	var caches = parent._cache;
529	var select = (parent.tagName == "SELECT" && !parent.options.length);
530	for(var i = 0, cache; cache = caches[i]; i++){
531	if(cache !== parent){
532	this.onAddNode && this.onAddNode(cache);
533	if(ie){
534	script += cache.data;
535	}else{
536	parent.appendChild(cache);
537	if(select && cache.defaultSelected && i){
538	select = i;
539	}
540	}
541	this.onAddNodeComplete && this.onAddNodeComplete(cache);
542	}
543	}
544	if(select){
545	parent.options.selectedIndex = (typeof select == "number") ? select : 0;
546	}
547	caches.length = 0;
548	parent._dirty = false;
549	}
550	if(ie){
551	parent.text = script;
552	}
553	}
554
555	this._parent = node;
556	this.onSetParent && this.onSetParent(node, up, root);
557	return this;
558	},
559	getParent: function(){
560	return this._parent;
561	},
562	getRootNode: function(){
563	return this.rootNode;
564	}
565	/*=====
566	,
567	onSetParent: function(node, up){
568	// summary:
569	// Stub called when setParent is used.
570	},
571	onAddNode: function(node){
572	// summary:
573	// Stub called before new nodes are added
574	},
575	onAddNodeComplete: function(node){
576	// summary:
577	// Stub called after new nodes are added
578	},
579	onRemoveNode: function(node){
580	// summary:
581	// Stub called when nodes are removed
582	},
583	onChangeAttribute: function(node, attribute, old, updated){
584	// summary:
585	// Stub called when an attribute is changed
586	},
587	onChangeData: function(node, old, updated){
588	// summary:
589	// Stub called when a data in a node is changed
590	},
591	onClone: function(from, to){
592	// summary:
593	// Stub called when a node is duplicated
594	// from: DOMNode
595	// to: DOMNode
596	},
597	onAddEvent: function(node, type, description){
598	// summary:
599	// Stub to call when you're adding an event
600	// node: DOMNode
601	// type: String
602	// description: String
603	}
604	=====*/
605	});
606
607	dd._DomNode = lang.extend(function(node){
608	// summary:
609	// Places a node into DOM
610	this.contents = node;
611	},
612	{
613	render: function(context, buffer){
614	this._rendered = true;
615	return buffer.concat(this.contents);
616	},
617	unrender: function(context, buffer){
618	if(!this._rendered){
619	return buffer;
620	}
621	this._rendered = false;
622	return buffer.remove(this.contents);
623	},
624	clone: function(buffer){
625	return new this.constructor(this.contents);
626	}
627	});
628
629	dd._DomNodeList = lang.extend(function(/Node[]/ nodes){
630	// summary:
631	// A list of any DOM-specific node objects
632	// description:
633	// Any object that's used in the constructor or added
634	// through the push function much implement the
635	// render, unrender, and clone functions.
636	this.contents = nodes \|\| [];
637	},
638	{
639	push: function(node){
640	this.contents.push(node);
641	},
642	unshift: function(node){
643	this.contents.unshift(node);
644	},
645	render: function(context, buffer, /Node/ instance){
646	buffer = buffer \|\| dd.DomTemplate.prototype.getBuffer();
647
648	if(instance){
649	var parent = buffer.getParent();
650	}
651	for(var i = 0; i < this.contents.length; i++){
652	buffer = this.contents[i].render(context, buffer);
653	if(!buffer) throw new Error("Template node render functions must return their buffer");
654	}
655	if(parent){
656	buffer.setParent(parent);
657	}
658	return buffer;
659	},
660	dummyRender: function(context, buffer, asNode){
661	// summary:
662	// A really expensive way of checking to see how a rendering will look.
663	// Used in the ifchanged tag
664	var div = document.createElement("div");
665
666	var parent = buffer.getParent();
667	var old = parent._clone;
668	// Tell the clone system to attach itself to our new div
669	parent._clone = div;
670	var nodelist = this.clone(buffer, div);
671	if(old){
672	// Restore state if there was a previous clone
673	parent._clone = old;
674	}else{
675	// Remove if there was no clone
676	parent._clone = null;
677	}
678
679	buffer = dd.DomTemplate.prototype.getBuffer();
680	nodelist.unshift(new dd.ChangeNode(div));
681	nodelist.unshift(new dd._DomNode(div));
682	nodelist.push(new dd.ChangeNode(div, true));
683	nodelist.render(context, buffer);
684
685	if(asNode){
686	return buffer.getRootNode();
687	}
688
689	var html = div.innerHTML;
690	return (has("ie")) ? domconstruct.replace(/\s_(dirty\|clone)="[^"]"/g, "") : html;
691	},
692	unrender: function(context, buffer, instance){
693	if(instance){
694	var parent = buffer.getParent();
695	}
696	for(var i = 0; i < this.contents.length; i++){
697	buffer = this.contents[i].unrender(context, buffer);
698	if(!buffer) throw new Error("Template node render functions must return their buffer");
699	}
700	if(parent){
701	buffer.setParent(parent);
702	}
703	return buffer;
704	},
705	clone: function(buffer){
706	// summary:
707	// Used to create an identical copy of a NodeList, useful for things like the for tag.
708	var parent = buffer.getParent();
709	var contents = this.contents;
710	var nodelist = new dd._DomNodeList();
711	var cloned = [];
712	for(var i = 0; i < contents.length; i++){
713	var clone = contents[i].clone(buffer);
714	if(clone instanceof dd.ChangeNode \|\| clone instanceof dd._DomNode){
715	var item = clone.contents._clone;
716	if(item){
717	clone.contents = item;
718	}else if(parent != clone.contents && clone instanceof dd._DomNode){
719	var node = clone.contents;
720	clone.contents = clone.contents.cloneNode(false);
721	buffer.onClone && buffer.onClone(node, clone.contents);
722	cloned.push(node);
723	node._clone = clone.contents;
724	}
725	}
726	nodelist.push(clone);
727	}
728
729	for(var i = 0, clone; clone = cloned[i]; i++){
730	clone._clone = null;
731	}
732
733	return nodelist;
734	},
735	rtrim: function(){
736	while(1){
737	var i = this.contents.length - 1;
738	if(this.contents[i] instanceof dd._DomTextNode && this.contents[i].isEmpty()){
739	this.contents.pop();
740	}else{
741	break;
742	}
743	}
744
745	return this;
746	}
747	});
748
749	dd._DomVarNode = lang.extend(function(str){
750	// summary:
751	// A node to be processed as a variable
752	// description:
753	// Will render an object that supports the render function
754	// and the getRootNode function
755	this.contents = new dd._Filter(str);
756	},
757	{
758	render: function(context, buffer){
759	var str = this.contents.resolve(context);
760
761	// What type of rendering?
762	var type = "text";
763	if(str){
764	if(str.render && str.getRootNode){
765	type = "injection";
766	}else if(str.safe){
767	if(str.nodeType){
768	type = "node";
769	}else if(str.toString){
770	str = str.toString();
771	type = "html";
772	}
773	}
774	}
775
776	// Has the typed changed?
777	if(this._type && type != this._type){
778	this.unrender(context, buffer);
779	}
780	this._type = type;
781
782	// Now render
783	switch(type){
784	case "text":
785	this._rendered = true;
786	this._txt = this._txt \|\| document.createTextNode(str);
787	if(this._txt.data != str){
788	var old = this._txt.data;
789	this._txt.data = str;
790	buffer.onChangeData && buffer.onChangeData(this._txt, old, this._txt.data);
791	}
792	return buffer.concat(this._txt);
793	case "injection":
794	var root = str.getRootNode();
795
796	if(this._rendered && root != this._root){
797	buffer = this.unrender(context, buffer);
798	}
799	this._root = root;
800
801	var injected = this._injected = new dd._DomNodeList();
802	injected.push(new dd.ChangeNode(buffer.getParent()));
803	injected.push(new dd._DomNode(root));
804	injected.push(str);
805	injected.push(new dd.ChangeNode(buffer.getParent()));
806	this._rendered = true;
807
808	return injected.render(context, buffer);
809	case "node":
810	this._rendered = true;
811	if(this._node && this._node != str && this._node.parentNode && this._node.parentNode === buffer.getParent()){
812	this._node.parentNode.removeChild(this._node);
813	}
814	this._node = str;
815	return buffer.concat(str);
816	case "html":
817	if(this._rendered && this._src != str){
818	buffer = this.unrender(context, buffer);
819	}
820	this._src = str;
821
822	// This can get reset in the above tag
823	if(!this._rendered){
824	this._rendered = true;
825	this._html = this._html \|\| [];
826	var div = (this._div = this._div \|\| document.createElement("div"));
827	div.innerHTML = str;
828	var children = div.childNodes;
829	while(children.length){
830	var removed = div.removeChild(children[0]);
831	this._html.push(removed);
832	buffer = buffer.concat(removed);
833	}
834	}
835
836	return buffer;
837	default:
838	return buffer;
839	}
840	},
841	unrender: function(context, buffer){
842	if(!this._rendered){
843	return buffer;
844	}
845	this._rendered = false;
846
847	// Unrender injected nodes
848	switch(this._type){
849	case "text":
850	return buffer.remove(this._txt);
851	case "injection":
852	return this._injection.unrender(context, buffer);
853	case "node":
854	if(this._node.parentNode === buffer.getParent()){
855	return buffer.remove(this._node);
856	}
857	return buffer;
858	case "html":
859	for(var i = 0, l = this._html.length; i < l; i++){
860	buffer = buffer.remove(this._html[i]);
861	}
862	return buffer;
863	default:
864	return buffer;
865	}
866	},
867	clone: function(){
868	return new this.constructor(this.contents.getExpression());
869	}
870	});
871
872	dd.ChangeNode = lang.extend(function(node, /Boolean?/ up, /Bookean/ root){
873	// summary:
874	// Changes the parent during render/unrender
875	this.contents = node;
876	this.up = up;
877	this.root = root;
878	},
879	{
880	render: function(context, buffer){
881	return buffer.setParent(this.contents, this.up, this.root);
882	},
883	unrender: function(context, buffer){
884	if(!buffer.getParent()){
885	return buffer;
886	}
887	return buffer.setParent(this.contents);
888	},
889	clone: function(){
890	return new this.constructor(this.contents, this.up, this.root);
891	}
892	});
893
894	dd.AttributeNode = lang.extend(function(key, value){
895	// summary
896	// Works on attributes
897	this.key = key;
898	this.value = value;
899	this.contents = value;
900	if(this._pool[value]){
901	this.nodelist = this._pool[value];
902	}else{
903	if(!(this.nodelist = dd.quickFilter(value))){
904	this.nodelist = (new dd.Template(value, true)).nodelist;
905	}
906	this._pool[value] = this.nodelist;
907	}
908
909	this.contents = "";
910	},
911	{
912	_pool: {},
913	render: function(context, buffer){
914	var key = this.key;
915	var value = this.nodelist.dummyRender(context);
916	if(dd.BOOLS[key]){
917	value = !(value == "false" \|\| value == "undefined" \|\| !value);
918	}
919	if(value !== this.contents){
920	this.contents = value;
921	return buffer.setAttribute(key, value);
922	}
923	return buffer;
924	},
925	unrender: function(context, buffer){
926	this.contents = "";
927	return buffer.remove(this.key);
928	},
929	clone: function(buffer){
930	return new this.constructor(this.key, this.value);
931	}
932	});
933
934	dd._DomTextNode = lang.extend(function(str){
935	// summary
936	// Adds a straight text node without any processing
937	this.contents = document.createTextNode(str);
938	this.upcoming = str;
939	},
940	{
941	set: function(data){
942	this.upcoming = data;
943	return this;
944	},
945	render: function(context, buffer){
946	if(this.contents.data != this.upcoming){
947	var old = this.contents.data;
948	this.contents.data = this.upcoming;
949	buffer.onChangeData && buffer.onChangeData(this.contents, old, this.upcoming);
950	}
951	return buffer.concat(this.contents);
952	},
953	unrender: function(context, buffer){
954	return buffer.remove(this.contents);
955	},
956	isEmpty: function(){
957	return !lang.trim(this.contents.data);
958	},
959	clone: function(){
960	return new this.constructor(this.contents.data);
961	}
962	});
963
964	dd._DomParser = lang.extend(function(tokens){
965	// summary:
966	// Turn a simple array into a set of objects
967	// description:
968	// This is also used by all tags to move through
969	// the list of nodes.
970	this.contents = tokens;
971	},
972	{
973	i: 0,
974	parse: function(/Array?/ stop_at){
975	var terminators = {};
976	var tokens = this.contents;
977	if(!stop_at){
978	stop_at = [];
979	}
980	for(var i = 0; i < stop_at.length; i++){
981	terminators[stop_at[i]] = true;
982	}
983	var nodelist = new dd._DomNodeList();
984	while(this.i < tokens.length){
985	var token = tokens[this.i++];
986	var type = token[0];
987	var value = token[1];
988	if(type == dd.TOKEN_CUSTOM){
989	nodelist.push(value);
990	}else if(type == dd.TOKEN_CHANGE){
991	var changeNode = new dd.ChangeNode(value, token[2], token[3]);
992	value[changeNode.attr] = changeNode;
993	nodelist.push(changeNode);
994	}else if(type == dd.TOKEN_ATTR){
995	var fn = ddt.getTag("attr:" + token[2], true);
996	if(fn && token[3]){
997	if (token[3].indexOf("{%") != -1 \|\| token[3].indexOf("{{") != -1) {
998	value.setAttribute(token[2], "");
999	}
1000	nodelist.push(fn(null, new dd.Token(type, token[2] + " " + token[3])));
1001	}else if(lang.isString(token[3])){
1002	if(token[2] == "style" \|\| token[3].indexOf("{%") != -1 \|\| token[3].indexOf("{{") != -1){
1003	nodelist.push(new dd.AttributeNode(token[2], token[3]));
1004	}else if(lang.trim(token[3])){
1005	try{
1006	html.attr(value, token[2], token[3]);
1007	}catch(e){}
1008	}
1009	}
1010	}else if(type == dd.TOKEN_NODE){
1011	var fn = ddt.getTag("node:" + value.tagName.toLowerCase(), true);
1012	if(fn){
1013	// TODO: We need to move this to tokenization so that it's before the
1014	// node and the parser can be passed here instead of null
1015	nodelist.push(fn(null, new dd.Token(type, value), value.tagName.toLowerCase()));
1016	}
1017	nodelist.push(new dd._DomNode(value));
1018	}else if(type == dd.TOKEN_VAR){
1019	nodelist.push(new dd._DomVarNode(value));
1020	}else if(type == dd.TOKEN_TEXT){
1021	nodelist.push(new dd._DomTextNode(value.data \|\| value));
1022	}else if(type == dd.TOKEN_BLOCK){
1023	if(terminators[value]){
1024	--this.i;
1025	return nodelist;
1026	}
1027	var cmd = value.split(/\s+/g);
1028	if(cmd.length){
1029	cmd = cmd[0];
1030	var fn = ddt.getTag(cmd);
1031	if(typeof fn != "function"){
1032	throw new Error("Function not found for " + cmd);
1033	}
1034	var tpl = fn(this, new dd.Token(type, value));
1035	if(tpl){
1036	nodelist.push(tpl);
1037	}
1038	}
1039	}
1040	}
1041
1042	if(stop_at.length){
1043	throw new Error("Could not find closing tag(s): " + stop_at.toString());
1044	}
1045
1046	return nodelist;
1047	},
1048	next_token: function(){
1049	// summary:
1050	// Returns the next token in the list.
1051	var token = this.contents[this.i++];
1052	return new dd.Token(token[0], token[1]);
1053	},
1054	delete_first_token: function(){
1055	this.i++;
1056	},
1057	skip_past: function(endtag){
1058	return dd._Parser.prototype.skip_past.call(this, endtag);
1059	},
1060	create_variable_node: function(expr){
1061	return new dd._DomVarNode(expr);
1062	},
1063	create_text_node: function(expr){
1064	return new dd._DomTextNode(expr \|\| "");
1065	},
1066	getTemplate: function(/String/ loc){
1067	return new dd.DomTemplate(ddh.getTemplate(loc));
1068	}
1069	});
1070
1071	return ddh;
1072	});

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