AccordionPanelRenderer.java

/*
 * Copyright 2009-2014 PrimeTek.
 *
 * 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.
 */
package org.primefaces.component.accordionpanel;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import org.primefaces.component.tabview.Tab;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.ComponentUtils;
import org.primefaces.util.HTML;
import org.primefaces.util.WidgetBuilder;

public class AccordionPanelRenderer extends CoreRenderer {

	@Override
	public void decode(FacesContext context, UIComponent component) {
		AccordionPanel acco = (AccordionPanel) component;
		Map<String, String> params = context.getExternalContext().getRequestParameterMap();
        String active = params.get(acco.getClientId(context) + "_active");
		
		if(active != null) {
            if(isValueBlank(active)) {                
                acco.setActiveIndex(null);
            }
            else {
                acco.setActiveIndex(active);
            }
		}
        
        decodeBehaviors(context, component);
	}

	@Override
	public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        Map<String, String> params = context.getExternalContext().getRequestParameterMap();
		AccordionPanel acco = (AccordionPanel) component;        

        if(acco.isContentLoadRequest(context)) {
        	String var = acco.getVar();
        	String clientId = acco.getClientId(context);

            if(var == null) {
                String tabClientId = params.get(clientId + "_newTab");
                Tab tabToLoad = acco.findTab(tabClientId);
                tabToLoad.encodeAll(context);
                tabToLoad.setLoaded(true);
            }
            else {
                int index = Integer.parseInt(params.get(clientId + "_tabindex"));
                acco.setIndex(index);
                acco.getChildren().get(0).encodeAll(context);
                acco.setIndex(-1);
            }
        }
        else {
            encodeMarkup(context, acco);
            encodeScript(context, acco);
        }
	}
	
	protected void encodeMarkup(FacesContext context, AccordionPanel acco) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		String clientId = acco.getClientId(context);
        String widgetVar = acco.resolveWidgetVar();
        String styleClass = acco.getStyleClass();
        styleClass = styleClass == null ? AccordionPanel.CONTAINER_CLASS : AccordionPanel.CONTAINER_CLASS + " " + styleClass;
		
        if(ComponentUtils.isRTL(context, acco)) {
            styleClass = styleClass + " ui-accordion-rtl";
        }
        
		writer.startElement("div", null);
		writer.writeAttribute("id", clientId, null);
        writer.writeAttribute("class", styleClass, null);
		if(acco.getStyle() != null) {
            writer.writeAttribute("style", acco.getStyle(), null);
        }
        
        writer.writeAttribute("role", "tablist", null);
        
        writer.writeAttribute(HTML.WIDGET_VAR, widgetVar, null);

		encodeTabs(context, acco);

        encodeStateHolder(context, acco);

		writer.endElement("div");
	}

	protected void encodeScript(FacesContext context, AccordionPanel acco) throws IOException {
		String clientId = acco.getClientId(context);
        boolean multiple = acco.isMultiple();
        
        WidgetBuilder wb = getWidgetBuilder(context);
        wb.init("AccordionPanel", acco.resolveWidgetVar(), clientId);
         		
        if(acco.isDynamic()) {
            wb.attr("dynamic", true).attr("cache", acco.isCache());
        }
        
        wb.attr("multiple", multiple, false)
        .callback("onTabChange", "function(panel)", acco.getOnTabChange())
        .callback("onTabShow", "function(panel)", acco.getOnTabShow());
        
        encodeClientBehaviors(context, acco);
        
        wb.finish();
	}

	protected void encodeStateHolder(FacesContext context, AccordionPanel accordionPanel) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		String clientId = accordionPanel.getClientId(context);
		String stateHolderId = clientId + "_active"; 
		
		writer.startElement("input", null);
		writer.writeAttribute("type", "hidden", null);
		writer.writeAttribute("id", stateHolderId, null);
		writer.writeAttribute("name", stateHolderId, null);
		writer.writeAttribute("value", accordionPanel.getActiveIndex(), null);
        writer.writeAttribute("autocomplete", "off", null);
		writer.endElement("input");
	}
	
	protected void encodeTabs(FacesContext context, AccordionPanel acco) throws IOException {
        boolean dynamic = acco.isDynamic();
        String var = acco.getVar();
        List<String> activeIndexes = Arrays.asList(acco.getActiveIndex().split(","));
        boolean rtl = acco.getDir().equalsIgnoreCase("rtl");

        if(var == null) {
            int i = 0;

            for(UIComponent child : acco.getChildren()) {
                if(child.isRendered() && child instanceof Tab) {  
                    boolean active = activeIndexes.indexOf(Integer.toString(i)) != -1;
                    
                    encodeTab(context, (Tab) child, active, dynamic, rtl);

                    i++;
                }
            }
        } 
        else {
            int dataCount = acco.getRowCount();
            Tab tab = (Tab) acco.getChildren().get(0);
            
            for(int i = 0; i < dataCount; i++) {
                acco.setIndex(i);
                boolean active = activeIndexes.indexOf(Integer.toString(i)) != -1;
                
                encodeTab(context, tab, active, dynamic, rtl);
            }
            
            acco.setIndex(-1);
        }
	}
 
    protected void encodeTab(FacesContext context, Tab tab, boolean active, boolean dynamic, boolean rtl) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        
        String headerClass = active ? AccordionPanel.ACTIVE_TAB_HEADER_CLASS : AccordionPanel.TAB_HEADER_CLASS;
        headerClass = tab.isDisabled() ? headerClass + " ui-state-disabled" : headerClass;
        headerClass = tab.getTitleStyleClass() == null ? headerClass : headerClass + " " + tab.getTitleStyleClass();
        String iconClass = active ? AccordionPanel.ACTIVE_TAB_HEADER_ICON_CLASS : (rtl ? AccordionPanel.TAB_HEADER_ICON_RTL_CLASS : AccordionPanel.TAB_HEADER_ICON_CLASS);
        String contentClass = active ? AccordionPanel.ACTIVE_TAB_CONTENT_CLASS : AccordionPanel.INACTIVE_TAB_CONTENT_CLASS;
        UIComponent titleFacet = tab.getFacet("title");

        //header container
        writer.startElement("h3", null);
        writer.writeAttribute("class", headerClass, null);
        writer.writeAttribute("role", "tab", null);
        writer.writeAttribute("aria-expanded", String.valueOf(active), null);
        if(tab.getTitleStyle() != null) writer.writeAttribute("style", tab.getTitleStyle(), null);
        if(tab.getTitletip() != null) writer.writeAttribute("title", tab.getTitletip(), null);

        //icon
        writer.startElement("span", null);
        writer.writeAttribute("class", iconClass, null);
        writer.endElement("span");

        if(titleFacet == null) {
            writer.write(tab.getTitle());
        }
        else {
            titleFacet.encodeAll(context);
        }

        writer.endElement("h3");

        //content
        writer.startElement("div", null);
        writer.writeAttribute("id", tab.getClientId(context), null);
        writer.writeAttribute("class", contentClass, null);
        writer.writeAttribute("role", "tabpanel", null);
        writer.writeAttribute("aria-hidden", String.valueOf(!active), null);

        if(dynamic) {
            if(active) {
                tab.encodeAll(context);
                tab.setLoaded(true);
            }
        }
        else
            tab.encodeAll(context);

        writer.endElement("div");
    }

    @Override
	public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
		//Do nothing
	}

    @Override
	public boolean getRendersChildren() {
		return true;
	}
}