598 lines
12 KiB
JavaScript
598 lines
12 KiB
JavaScript
/**
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* Creates a object from a XML specification.
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**/
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Vn.Builder = new Class
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({
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Extends: Vn.Object
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,_addedMap: {}
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,_contexts: null
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,add: function (id, object)
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{
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this._addedMap[id] = object;
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}
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,setParent: function (parentResult)
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{
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this._parentResult = parentResult;
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if (parentResult && !this.signalData)
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this.signalData = parentResult.builder.signalData;
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}
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,getMain: function (result)
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{
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return result.objects[this._mainContext];
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}
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,getById: function (result, objectId)
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{
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var index = this._contextMap[objectId];
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if (index !== undefined)
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return result.objects[index];
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else if (this._parentResult)
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return this._parentResult.getById (objectId);
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return null;
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}
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,getByTagName: function (result, tagName)
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{
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var tags = this._tags[tagName];
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if (tags)
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{
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var arr = new Array (tags.length);
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for (var i = 0; i < tags.length; i++)
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arr[i] = result.objects[tags[i]];
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return arr;
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}
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return [];
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}
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/**
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* Compiles an XML file.
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*
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* @path String The XML path
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* @dstDocument Document The document used to create the nodes
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* @return %true on success, %false othersise
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**/
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,loadXml: function (path, dstDocument)
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{
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var xmlDoc = Vn.getXml (path);
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if (!xmlDoc)
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return false;
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this._compileInit (dstDocument);
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this._path = path;
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var docElement = xmlDoc.documentElement;
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if (docElement.tagName !== 'vn')
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{
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this._showError ('Malformed XML');
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this._contexts = null;
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return false;
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}
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var childs = docElement.childNodes;
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if (childs)
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for (var i = 0; i < childs.length; i++)
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this._compileNode (childs[i]);
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this._compileEnd ();
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return true;
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}
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/**
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* Compiles a single DOM node.
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*
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* @path Node The DOM node
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* @dstDocument Document The document used to create the nodes
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* @return %true on success, %false othersise
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**/
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,loadXmlFromNode: function (node, dstDocument)
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{
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this._compileInit (dstDocument);
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this._mainContext = this._compileNode (node).id;
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this._compileEnd ();
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return true;
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}
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,load: function ()
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{
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if (this._contexts === null)
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return null;
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var contexts = this._contexts;
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var len = contexts.length;
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var objects = new Array (len);
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for (var i = 0; i < len; i++)
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{
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var context = contexts[i];
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if (context.tagName)
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objects[i] = this.elementInstantiate (context);
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else if (context.klass)
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objects[i] = this.objectInstantiate (context);
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else
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objects[i] = this.textInstantiate (context);
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}
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return new BuilderResult (this, objects);
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}
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,link: function (result)
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{
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var objects = result.objects;
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for (var i = this._links.length - 1; i >= 0; i--)
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{
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var l = this._links[i];
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var addedObject = this._addedMap[l.objectId];
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if (addedObject)
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if (l.prop)
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objects[l.context.id][l.prop] = addedObject;
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else
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objects[l.context.id].appendChild (addedObject);
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else
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this._showError ('Referenced unexistent object with id \'%s\'',
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l.objectId);
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}
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var contexts = this._contexts;
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for (var i = 0; i < contexts.length; i++)
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{
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var context = contexts[i];
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var object = objects[i];
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if (context.tagName)
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this.elementLink (context, object, objects, result);
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else if (context.klass)
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this.objectLink (context, object, objects, result);
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}
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}
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,_compileInit: function (dstDocument)
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{
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this._path = null;
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this._tags = {};
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this._contexts = [];
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this._contextMap = {};
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this._links = [];
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this._mainContext = null;
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this._document = dstDocument ? dstDocument : document;
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}
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,_compileEnd: function (node)
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{
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for (var i = this._links.length - 1; i >= 0; i--)
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{
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var l = this._links[i];
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var contextId = this._contextMap[l.objectId]
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if (contextId != undefined)
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{
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if (l.prop)
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l.context.objectProps[l.prop] = contextId;
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else
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l.context.childs.push (contextId);
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this._links.splice (i, 1);
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}
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else
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{
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var object = this._addedMap[l.objectId];
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if (!object && this._parentResult)
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object = this._parentResult.getById (l.objectId);
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if (object)
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{
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l.context.props[l.prop] = object;
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this._links.splice (i, 1);
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}
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}
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}
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}
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,_compileNode: function (node)
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{
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var context = null;
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var tagName = null;
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if (node.nodeType === Node.ELEMENT_NODE)
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tagName = node.tagName.toLowerCase ();
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else if (node.nodeType !== Node.TEXT_NODE
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|| /^[\n\r\t]*$/.test (node.textContent))
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return null;
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var context =
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this.textCompile (node, tagName)
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|| this.objectCompile (node, tagName)
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|| this.elementCompile (node, tagName);
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context.id = this._contexts.length;
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if (tagName)
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{
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var nodeId = node.getAttribute ('id');
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if (nodeId)
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this._contextMap[nodeId] = context.id;
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var tags = this._tags[tagName];
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if (!tags)
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this._tags[tagName] = tags = [];
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tags.push (context.id);
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}
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this._contexts.push (context);
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return context;
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}
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/**
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* Creates a text node context.
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**/
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,textCompile: function (node, tagName)
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{
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if (!tagName)
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var text = node.textContent;
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else if (tagName === 't')
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var text = _(node.firstChild.textContent);
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else
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return null;
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return {text: text};
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}
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,textInstantiate: function (context)
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{
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return this._document.createTextNode (context.text);
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}
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/**
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* Creates a object context.
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**/
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,objectCompile: function (node, tagName)
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{
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var klass = Vn.customTags[tagName];
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if (!klass)
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return null;
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var props = {};
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var objectProps = {};
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var childs = [];
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var events = {};
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var context = {
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klass: klass,
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props: props,
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objectProps: objectProps,
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childs: childs,
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events: events,
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custom: null
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};
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var a = node.attributes;
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for (var i = 0; i < a.length; i++)
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{
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var attribute = a[i].nodeName;
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var value = a[i].nodeValue;
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if (this._isEvent (attribute))
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{
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var handler = this._getMethod (value)
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if (handler)
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events[attribute.substr (3)] = handler;
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}
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else if (!/^(id|property)$/.test (attribute))
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{
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this.propCompile (context, klass, props,
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node, attribute, value);
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}
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}
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var childNodes = node.childNodes;
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if (childNodes)
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for (var i = 0; i < childNodes.length; i++)
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{
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var child = childNodes[i];
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if (child.nodeType !== Node.ELEMENT_NODE)
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continue;
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var childContext;
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var childTagName = child.tagName.toLowerCase ();
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if (childTagName === 'pointer')
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{
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this._addLink (context, null, child.getAttribute ('object'));
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}
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else if (childTagName === 'custom')
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{
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context.custom = child;
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}
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else if (childContext = this._compileNode (child))
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{
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var prop = child.getAttribute ('property');
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if (prop)
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{
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prop = prop.replace (/-./g, this._replaceFunc);
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objectProps[prop] = childContext.id;
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}
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else
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childs.push (childContext.id);
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}
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}
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return context;
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}
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,propCompile: function (context, klass, props, node, attribute, value)
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{
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var isLink = false;
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var newValue = null;
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var propName = attribute.replace (/-./g, this._replaceFunc);
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var propInfo = klass.Properties[propName];
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if (!propInfo)
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{
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this._showError ('Attribute \'%s\' not valid for tag \'%s\'',
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attribute, node.tagName);
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return;
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}
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if (!value)
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{
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this._showError ('Attribute \'%s\' empty on tag \'%s\'',
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attribute, node.tagName);
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return;
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}
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switch (propInfo.type)
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{
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case Boolean:
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newValue = (/^(true|1)$/i).test (value);
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break;
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case Number:
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newValue = 0 + new Number (value);
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break;
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case String:
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newValue = this._translateValue (value);
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break;
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case Function:
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var method = this._getMethod (value);
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newValue = method ? method.bind (this.signalData) : null;
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break;
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default:
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if (propInfo.enumType)
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newValue = propInfo.enumType[value];
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else if (propInfo.type instanceof Function)
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isLink = true;
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}
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if (isLink)
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this._addLink (context, propName, value);
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else if (newValue !== null && newValue !== undefined)
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props[propName] = newValue;
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else
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this._showError ('Attribute \'%s\' invalid for tag \'%s\'',
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attribute, node.tagName);
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}
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,objectInstantiate: function (context)
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{
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return new context.klass ();
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}
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,objectLink: function (context, object, objects, res)
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{
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object.setProperties (context.props);
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var objectProps = context.objectProps;
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for (var prop in objectProps)
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object[prop] = objects[objectProps[prop]];
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var childs = context.childs;
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for (var i = 0; i < childs.length; i++)
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object.appendChild (objects[childs[i]]);
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var events = context.events;
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for (var event in events)
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object.on (event, events[event], this.signalData);
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if (context.custom)
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object.loadXml (res, context.custom);
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}
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/**
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* Creates a HTML node context.
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**/
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,elementCompile: function (node, tagName)
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{
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var attributes = {};
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var childs = [];
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var events = {};
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var handler;
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var a = node.attributes;
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for (var i = 0; i < a.length; i++)
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{
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var attribute = a[i].nodeName;
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var value = a[i].nodeValue;
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if (this._isEvent (attribute))
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{
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var handler = this._getMethod (value);
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if (handler)
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events[attribute.substr (3)] = handler;
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}
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else if (attribute !== 'id')
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attributes[attribute] = this._translateValue (value);
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}
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var childContext;
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var childNodes = node.childNodes;
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if (childNodes)
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for (var i = 0; i < childNodes.length; i++)
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if (childContext = this._compileNode (childNodes[i]))
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childs.push (childContext.id);
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return {
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tagName: tagName,
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attributes: attributes,
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childs: childs,
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events: events
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};
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}
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,elementInstantiate: function (context)
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{
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return this._document.createElement (context.tagName);
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}
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,elementLink: function (context, object, objects)
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{
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var attributes = context.attributes;
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for (var attribute in attributes)
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object.setAttribute (attribute, attributes[attribute]);
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var childs = context.childs;
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for (var i = 0; i < childs.length; i++)
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{
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var child = objects[childs[i]];
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if (child instanceof Htk.Widget)
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child = child.getNode ();
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if (child instanceof Node)
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object.appendChild (child);
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}
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var events = context.events;
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for (var event in events)
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object.addEventListener (event,
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events[event].bind (this.signalData));
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}
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,_showError: function (error)
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{
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var path = this._path ? this._path : 'Node';
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var logArgs = ['Vn.Builder: %s: '+ error, path];
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for (var i = 1; i < arguments.length; i++)
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logArgs.push (arguments[i]);
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console.warn.apply (null, logArgs);
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}
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,_addLink: function (context, prop, objectId)
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{
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this._links.push ({
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context: context
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,prop: prop
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,objectId: objectId
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});
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}
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,_translateValue: function (value)
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{
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var chr = value.charAt (0);
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if (chr === '_')
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return _(value.substr (1));
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else if (chr === '\\' && value.charAt (1) === '_')
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return value.substr (1);
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return value;
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}
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,_getMethod: function (value)
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{
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if (this.signalData)
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var method = this.signalData[value];
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else
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var method = window[value];
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if (method === undefined)
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this._showError ('Function \'%s\' not found', value);
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return method;
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}
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,_isEvent: function (attribute)
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{
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return /^on-\w+/.test (attribute);
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}
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,_replaceFunc: function (token)
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{
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return token.charAt(1).toUpperCase ();
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}
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});
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var BuilderResult = new Class
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({
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Extends: Vn.Object
|
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|
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,initialize: function (builder, objects)
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{
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this.builder = builder;
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this.objects = objects;
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}
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,getMain: function ()
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{
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return this.builder.getMain (this);
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}
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,$: function (objectId)
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{
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return this.builder.getById (this, objectId);
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}
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,getById: function (objectId)
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{
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return this.builder.getById (this, objectId);
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}
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,getByTagName: function (tagName)
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{
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return this.builder.getByTagName (this, tagName);
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}
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,link: function ()
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{
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this.builder.link (this);
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}
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,_destroy: function ()
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{
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var objects = this.objects;
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for (var i = 0; i < objects.length; i++)
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if (objects[i] instanceof Vn.Object)
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objects[i].unref ();
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this.parent ();
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}
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});
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