New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 76 insertions, 0 deletions

diff --git a/includes/js/dojox/dtl/render/html.js b/includes/js/dojox/dtl/render/html.js
new file mode 100644
index 0000000..943dfbe
--- /dev/null
+++ b/includes/js/dojox/dtl/render/html.js
@@ -0,0 +1,76 @@
+if(!dojo._hasResource["dojox.dtl.render.html"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.dtl.render.html"] = true;
+dojo.provide("dojox.dtl.render.html");
+dojo.require("dojox.dtl.Context");
+
+dojox.dtl.render.html.sensitivity = {
+	// summary:
+	//		Set conditions under which to buffer changes
+	// description:
+	//		Necessary if you make a lot of changes to your template.
+	//		What happens is that the entire node, from the attached DOM Node
+	//		down gets swapped with a clone, and until the entire rendering
+	//		is complete, we don't replace the clone again. In this way, renders are
+	//		"batched".
+	//
+	//		But, if we're only changing a small number of nodes, we might no want to buffer at all.
+	//		The higher numbers mean that even small changes will result in buffering.
+	//		Each higher level includes the lower levels.
+	NODE: 1, // If a node changes, implement buffering
+	ATTRIBUTE: 2, // If an attribute or node changes, implement buffering
+	TEXT: 3 // If any text at all changes, implement buffering
+}
+dojox.dtl.render.html.Render = function(/*DOMNode?*/ attachPoint, /*dojox.dtl.HtmlTemplate?*/ tpl){
+	this._tpl = tpl;
+	this.domNode = attachPoint;
+	this._swap = dojo.hitch(this, function(){
+		// summary: Swaps the node out the first time the DOM is changed
+		// description: Gets swapped back it at end of render
+		if(this.domNode === this._tpl.getRootNode()){
+			var frag = this.domNode;
+			this.domNode = this.domNode.cloneNode(true);
+			frag.parentNode.replaceChild(this.domNode, frag);
+		}
+	});
+}
+dojo.extend(dojox.dtl.render.html.Render, {
+	sensitivity: dojox.dtl.render.html.sensitivity,
+	setAttachPoint: function(/*Node*/ node){
+		this.domNode = node;
+	},
+	render: function(/*Object*/ context, /*dojox.dtl.HtmlTemplate?*/ tpl, /*dojox.dtl.HtmlBuffer?*/ buffer){
+		if(!this.domNode){
+			throw new Error("You cannot use the Render object without specifying where you want to render it");
+		}
+
+		tpl = tpl || this._tpl;
+		buffer = buffer || tpl.getBuffer();
+		context = context || new dojox.dtl.Context();
+
+		if(context.getThis() && context.getThis().buffer == this.sensitivity.NODE){
+			var onAddNode = dojo.connect(buffer, "onAddNode", this, "_swap");
+			var onRemoveNode = dojo.connect(buffer, "onRemoveNode", this, "_swap");
+		}
+
+		if(this._tpl && this._tpl !== tpl){
+			this._tpl.unrender(context, buffer);
+		}
+		this._tpl = tpl;
+
+		var frag = tpl.render(context, buffer).getParent();
+		if(!frag){
+			throw new Error("Rendered template does not have a root node");
+		}
+
+		dojo.disconnect(onAddNode);
+		dojo.disconnect(onRemoveNode);
+
+		if(this.domNode !== frag){
+			this.domNode.parentNode.replaceChild(frag, this.domNode);
+			dojo._destroyElement(this.domNode);
+			this.domNode = frag;
+		}
+	}
+});
+
+}