DialogRenderer.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.dialog;

import java.io.IOException;
import java.util.logging.Logger;

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

import org.primefaces.expression.SearchExpressionFacade;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.ComponentUtils;
import org.primefaces.util.WidgetBuilder;

public class DialogRenderer extends CoreRenderer {

	private static final Logger LOG = Logger.getLogger(DialogRenderer.class.getName());
	
    @Override
    public void decode(FacesContext context, UIComponent component) {
        super.decodeBehaviors(context, component);
    }

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        Dialog dialog = (Dialog) component;
        
        if(dialog.isContentLoadRequest(context)) {
            renderChildren(context, component);
        } 
        else {
            encodeMarkup(context, dialog);
            encodeScript(context, dialog);
        }
    }

    protected void encodeScript(FacesContext context, Dialog dialog) throws IOException {
        String clientId = dialog.getClientId(context);
        WidgetBuilder wb = getWidgetBuilder(context);
        wb.initWithDomReady("Dialog", dialog.resolveWidgetVar(), clientId);

        wb.attr("visible", dialog.isVisible(), false)
            .attr("draggable", dialog.isDraggable(), true)
            .attr("resizable", dialog.isResizable(), true)
            .attr("modal", dialog.isModal(), false)
            .attr("width", dialog.getWidth(), null)
            .attr("height", dialog.getHeight(), null)
            .attr("minWidth", dialog.getMinWidth(), Integer.MIN_VALUE)
            .attr("minHeight", dialog.getMinHeight(), Integer.MIN_VALUE)
            .attr("appendTo", SearchExpressionFacade.resolveComponentForClient(context, dialog, dialog.getAppendTo()), null)
            .attr("dynamic", dialog.isDynamic(), false)
            .attr("showEffect", dialog.getShowEffect(), null)
            .attr("hideEffect", dialog.getHideEffect(), null)
            .attr("position", dialog.getPosition(), null)
            .attr("closeOnEscape", dialog.isCloseOnEscape(), false)
            .attr("fitViewport", dialog.isFitViewport(), false)  
            .callback("onHide", "function()", dialog.getOnHide())
            .callback("onShow", "function()", dialog.getOnShow());
        
        String focusExpressions = SearchExpressionFacade.resolveComponentsForClient(
        		context, dialog, dialog.getFocus());
        if (focusExpressions != null) {
        	wb.attr("focus", focusExpressions);
        }

        encodeClientBehaviors(context, dialog);
         
        wb.finish();
    }

    protected void encodeMarkup(FacesContext context, Dialog dialog) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String clientId = dialog.getClientId(context);
        String style = dialog.getStyle();
        String styleClass = dialog.getStyleClass();
        styleClass = styleClass == null ? Dialog.CONTAINER_CLASS : Dialog.CONTAINER_CLASS + " " + styleClass;
        
        if(ComponentUtils.isRTL(context, dialog)) {
            styleClass += " ui-dialog-rtl";
        }

        writer.startElement("div", null);
        writer.writeAttribute("id", clientId, null);
        writer.writeAttribute("class", styleClass, null);
        
        if(style != null) {
            writer.writeAttribute("style", style, null);
        }

        if(dialog.isShowHeader()) {
            encodeHeader(context, dialog);
        }
        
        encodeContent(context, dialog);

        encodeFooter(context, dialog);

        writer.endElement("div");
    }

    protected void encodeHeader(FacesContext context, Dialog dialog) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String header = dialog.getHeader();
        UIComponent headerFacet = dialog.getFacet("header");
        
        writer.startElement("div", null);
        writer.writeAttribute("class", Dialog.TITLE_BAR_CLASS, null);
        
        //title
        writer.startElement("span", null);
        writer.writeAttribute("id", dialog.getClientId(context) + "_title", null);
        writer.writeAttribute("class", Dialog.TITLE_CLASS, null);
        
        if(headerFacet != null)
            headerFacet.encodeAll(context);
        else if(header != null)
            writer.write(header);
        
        writer.endElement("span");
        
        if(dialog.isClosable()) {
            encodeIcon(context, Dialog.TITLE_BAR_CLOSE_CLASS, Dialog.CLOSE_ICON_CLASS);
        }
        
        if(dialog.isMaximizable()) {
            encodeIcon(context, Dialog.TITLE_BAR_MAXIMIZE_CLASS, Dialog.MAXIMIZE_ICON_CLASS);
        }
                
        if(dialog.isMinimizable()) {
            encodeIcon(context, Dialog.TITLE_BAR_MINIMIZE_CLASS, Dialog.MINIMIZE_ICON_CLASS);
        }
        
        writer.endElement("div");
    }

    protected void encodeFooter(FacesContext context, Dialog dialog) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String footer = dialog.getFooter();
        UIComponent footerFacet = dialog.getFacet("footer");
        
        if(footer == null && (footerFacet == null || !footerFacet.isRendered()))
            return;
        
        writer.startElement("div", null);
        writer.writeAttribute("class", Dialog.FOOTER_CLASS, null);
        
        writer.startElement("span", null);
        if(footerFacet != null)
            footerFacet.encodeAll(context);
        else if(footer != null)
            writer.write(footer);
        writer.endElement("span");
        
        writer.endElement("div");
        
    }
    
    protected void encodeContent(FacesContext context, Dialog dialog) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        
        writer.startElement("div", null);
        writer.writeAttribute("class", Dialog.CONTENT_CLASS, null);
        
        if(!dialog.isDynamic()) {
            renderChildren(context, dialog);
        }
        
        writer.endElement("div");
    }
    
    protected void encodeIcon(FacesContext context, String anchorClass, String iconClass) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        
        writer.startElement("a", null);
        writer.writeAttribute("href", "#", null);
        writer.writeAttribute("class", anchorClass, null);

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

        writer.endElement("a");
    }
    
    @Override
    public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
        //Rendering happens on encodeEnd
    }

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