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${icefaces.product.name} ACE Component Library
/*
* Original Code Copyright Prime Technology.
* Subsequent Code Modifications Copyright 2011-2012 ICEsoft Technologies Canada Corp. (c)
*
* 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 WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* NOTE THIS CODE HAS BEEN MODIFIED FROM ORIGINAL FORM
*
* Subsequent Code Modifications have been made and contributed by ICEsoft Technologies Canada Corp. (c).
*
* Code Modification 1: Integrated with ICEfaces Advanced Component Environment.
* Contributors: ICEsoft Technologies Canada Corp. (c)
*
* Code Modification 2: [ADD BRIEF DESCRIPTION HERE]
* Contributors: ______________________
* Contributors: ______________________
*/
package org.icefaces.ace.renderkit;
import org.icefaces.ace.util.Constants;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.application.Resource;
import javax.faces.application.ProjectStage;
import javax.faces.component.UIComponent;
import javax.faces.component.UIOutput;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.*;
import javax.faces.render.Renderer;
import java.io.IOException;
import java.util.ListIterator;
import java.util.Map;
@ListenerFor(systemEventClass=PostAddToViewEvent.class)
public class HeadRenderer extends Renderer implements ComponentSystemEventListener {
@Override
public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.startElement("head", component);
//Resources
UIViewRoot viewRoot = context.getViewRoot();
ListIterator iter = (viewRoot.getComponentResources(context, "head")).listIterator();
boolean developmentStage = context.isProjectStage(ProjectStage.Development);
while (iter.hasNext()) {
UIComponent resource = (UIComponent) iter.next();
if (developmentStage) {
resource = modifyIfAceScriptResource(resource);
}
resource.encodeAll(context);
}
}
private UIComponent modifyIfAceScriptResource(UIComponent resource) {
if (resource instanceof UIOutput) {
if ("javax.faces.resource.Script".equals(resource.getRendererType())) {
Map attrs = resource.getAttributes();
Object library = attrs.get("library");
Object nameValue = attrs.get("name");
if ("icefaces.ace".equals(library)) {
String name = nameValue == null ? "" : (String) nameValue;
if (name.endsWith("ace-yui.js")) {
return createAceScriptResource("util/ace-yui.uncompressed.js");
} else if (name.endsWith("ace-jquery.js")) {
return createAceScriptResource("util/ace-jquery.uncompressed.js");
} else if (name.endsWith("ace-datatable.js")) {
return createAceScriptResource("util/ace-datatable.uncompressed.js");
} else if (name.endsWith("ace-menu.js")) {
return createAceScriptResource("util/ace-menu.uncompressed.js");
} else if (name.endsWith("ace-components.js")) {
return createAceScriptResource("util/ace-components.uncompressed.js");
} else if (name.endsWith("ace-chart.js")) {
return createAceScriptResource("chart/ace-chart.uncompressed.js");
}
}
}
}
return resource;
}
private UIComponent createAceScriptResource(String name) {
UIComponent resource = FacesContext.getCurrentInstance().getApplication().createComponent("javax.faces.Output");
resource.setRendererType("javax.faces.resource.Script");
Map attrs = resource.getAttributes();
attrs.put("name", name);
attrs.put("library", "icefaces.ace");
return resource;
}
@Override
public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
//no-op
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.endElement("head");
}
private UIComponent createThemeResource(FacesContext fc, String library, String resourceName) {
UIComponent resource = fc.getApplication().createComponent("javax.faces.Output");
resource.setRendererType("javax.faces.resource.Stylesheet");
Map attrs = resource.getAttributes();
attrs.put("name", resourceName);
attrs.put("library", library);
attrs.put("target", "head");
return resource;
}
protected void encodeTheme(FacesContext context, String library, String resource) {
Resource themeResource = context.getApplication().getResourceHandler().createResource(resource, library);
if (themeResource == null) {
throw new FacesException("Error loading theme, cannot find \"" + resource + "\" resource of \"" + library + "\" library");
} else {
UIComponent resourceComponent = createThemeResource(context, library, resource);
context.getViewRoot().addComponentResource(context, resourceComponent);
}
}
public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
//Theme
FacesContext context = FacesContext.getCurrentInstance();
String theme = (String) context.getExternalContext().getSessionMap().get(Constants.THEME_PARAM);
String themeParamValue = context.getExternalContext().getInitParameter(Constants.THEME_PARAM);
if (theme == null && themeParamValue != null) {
ELContext elContext = context.getELContext();
ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
ValueExpression ve = expressionFactory.createValueExpression(elContext, themeParamValue, String.class);
theme = (String) ve.getValue(elContext);
}
if (theme == null) theme = "";
else theme = theme.trim();
if ("".equals(theme) || theme.equalsIgnoreCase("sam")) {
encodeTheme(context, "icefaces.ace", "themes/sam/theme.css");
} else if (theme.equalsIgnoreCase("rime")) {
encodeTheme(context, "icefaces.ace", "themes/rime/theme.css");
} else if (!theme.equalsIgnoreCase("none")) {
encodeTheme(context, "ace-" + theme, "theme.css");
}
}
}