/* Copyright 2004-2005 the original author or authors. * * 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 c;pWARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import org.springframework.validation.Errors;import org.springframework.context.NoSuchMessageException;import org.springframework.web.servlet.support.RequestContextUtils as RCU;import org.codehaus.groovy.grails.commons.GrailsClassUtils as GCU;/***  A  tag lib that provides UI widgets for use with Grails** @author Graeme Rocher* @since 24-March-2006*/class UITagLib {    /**     * A tree widget based on the Yahoo UI library     **/	def tree = { attrs, body ->		if(!request[JavascriptTagLib.INCLUDED_LIBRARIES] || !request[JavascriptTagLib.INCLUDED_LIBRARIES].contains('yahoo')) {			out << '<script type="text/javascript">alert("Grails Message: The tree widget requires the \'yahoo\' and \'treeview\' libraries to be included with the <g:javascript library=\'yahooTree\' /> tag");</script>'				}		else {	        if(!attrs.id)	            throwTagError("Tag [tree] is missing required attribute [id]")			        if(!attrs.root)	            throwTagError("Tag [tree] is missing required attribute [root]")			            	          			def nodeEvents = attrs.findAll { k,v -> k ==~ /^onNode\w*/ }						out << """			<div id='${attrs.id}'></div>			<script type=\"text/javascript\">					YAHOO.widget.TreeView.prototype.resetEvents = function(children) {						if(children == null)							children = this.getRoot().children;								for(var i = 0;i<children.length;i++) {								"""								nodeEvents.each { k,v ->									def name = k[6..k.size()-1].toLowerCase()									out.println "YAHOO.util.Event.addListener(children[i].labelElId, '$name', $v);"								}											out << """								if(children[i].hasChildren(false)) {									this.resetEvents(children[i].children);									}							}											}					var ${attrs.id} = new YAHOO.widget.TreeView(\"${attrs.id}\")					${attrs.id}.setExpandAnim(YAHOO.widget.TVAnim.FADE_IN);					${attrs.id}.setCollapseAnim(YAHOO.widget.TVAnim.FADE_OUT);"""								if(attrs.onExpand) {				out << """				${attrs.id}.onExpand =${attrs.onExpand}				"""							}					if(attrs.onCollapse) {				out << """				${attrs.id}.onCollapse = ${attrs.onCollapse}				"""							}									if(attrs.root) {				out.println "var ${attrs.id}Root = new YAHOO.widget.TextNode({label:'$attrs.root',id:'${attrs.root.ident()}'},${attrs.id}.getRoot(), false);"												nodeEvents.each { k,v ->					def name = k[6..k.size()-1].toLowerCase()					out.println "YAHOO.util.Event.addListener(${attrs.id}Root.labelElId, '$name', $v);"				}						if(attrs.childrenProperty) {					def children = attrs.root.getProperty(attrs.childrenProperty)					buildTreeFromChildren(children,"${attrs.id}Root",attrs.childrenProperty,1)				}				else if(attrs.dynamicLoadUri) {					out.println "${attrs.id}.setDynamicLoad(${attrs.id}DynamicTreeLoad);"												def method = (attrs.method? attrs.method : 'GET')					out << """						function ${attrs.id}DynamicTreeLoad(node,onCompleteCallback)  {							var cObj = YAHOO.util.Connect.asyncRequest('$method', '"""												createLink(attrs.dynamicLoadUri)									out << """/' + node.data.id, {success:function(o) {								var nodes = eval(o.responseText);																var tmpNode = null;								for(var i = 0; i < nodes.length;i++) {									var tmpNodeProps = { label: nodes[i].label, id: nodes[i].id }									tmpNode = new YAHOO.widget.TextNode(tmpNodeProps, node, false);								}															onCompleteCallback();"""					nodeEvents.each { k,v ->						def name = k[6..k.size()-1].toLowerCase()						out.println "for(var i = 0; i < node.children.length;i++) {"							out.println "YAHOO.util.Event.addListener(node.children[i].labelElId, '$name', $v);"						out.println "}"					}								     												out <<	"""}});																									}					"""				}				else {		            throwTagError("Tag [tree] requires one of either the [dynamicLoadUri] or [childrenProperty] attributes to be specified")											}			}			out <<	"""				${attrs.id}.draw()			</script>"""		}				}		// Recursive method that traverses an object graphic building up the tree	def buildTreeFromChildren(children,parentName,childrenPropertyName,index) {		if(children) {			children.each { child ->				def label = child.toString()							out.println "var node${index} = new YAHOO.widget.TextNode({label:'$label',id:'${child.ident()}'}, ${parentName}, false);"								def moreChildren = child.getProperty(childrenPropertyName)				if(moreChildren) {					buildTreeFromChildren(moreChildren,"node${index}",childrenPropertyName,++index)					index = index + moreChildren.size()									}														}							}		}		/**	 * A Rich Text Editor component that by default uses fckeditor with a basepath of /fckeditor.	 * TODO: Add support for other rich text editing components like those from the Dojo framework	 *	 * Example:	 *	 * <g:richTextEditor name="editor" height="400" />	 */	def richTextEditor = { attrs ->		withTag(name:'script',attributes:[type:'text/javascript']) {			if(attrs.onComplete) {				out.println "function FCKeditor_OnComplete( editorInstance ) {"					out.println "${attrs.onComplete}(editorInstance);"									out.println "}"			}			out << """			var oFCKeditor = new FCKeditor( '${attrs.name}' ) ;			oFCKeditor.BasePath	 = \""""			if(attrs.basepath) {				createLinkTo(dir:attrs.basepath)			}			else {				createLinkTo(dir:"fckeditor/")			}			out.println '";'			if(attrs.toolbar) {				out << "oFCKeditor.ToolbarSet	 = '${attrs.toolbar}';" 				}						if(attrs.height)							out.println "oFCKeditor.Height	= ${attrs.height};"			if(attrs.value) {				out << "oFCKeditor.Value	= \""				escapeJavascript(Collections.EMPTY_MAP,attrs.value)				out.println "\" ;"			}						out.println "oFCKeditor.Create();"					}	}}