LayoutDevTagHandler.java

/*
 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * 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.
 *
 * Contributors:
 *     Anahide Tchertchian
 */
package org.nuxeo.ecm.platform.forms.layout.facelets.dev;

import java.io.IOException;

import javax.el.ELException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletException;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagAttributes;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;

import org.nuxeo.ecm.platform.forms.layout.api.BuiltinModes;
import org.nuxeo.ecm.platform.forms.layout.api.Layout;
import org.nuxeo.ecm.platform.forms.layout.facelets.FaceletHandlerHelper;
import org.nuxeo.ecm.platform.ui.web.tag.handler.TagConfigFactory;

import com.sun.faces.facelets.tag.ui.DecorateHandler;

/**
 * Dev tag handler for layouts, retrieving the template on the layout definition (or its type definition) using the
 * template defined in mode {@link BuiltinModes#DEV}.
 * <p>
 * When no template is defined, this handler is skipped.
 *
 * @since 6.0
 */
public class LayoutDevTagHandler extends TagHandler {

    protected final TagConfig config;

    protected final TagAttribute layout;

    public LayoutDevTagHandler(TagConfig config) {
        super(config);
        this.config = config;
        this.layout = getRequiredAttribute("layout");
    }

    @Override
    public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
            ELException {
        Layout layoutInstance = (Layout) layout.getObject(ctx, Layout.class);
        FaceletHandlerHelper helper = new FaceletHandlerHelper(config);
        TagAttribute templateAttr = helper.createAttribute("template", layoutInstance.getDevTemplate());
        TagAttributes attributes = FaceletHandlerHelper.getTagAttributes(templateAttr);
        String widgetTagConfigId = layoutInstance.getTagConfigId();
        TagConfig config = TagConfigFactory.createTagConfig(this.config, widgetTagConfigId, attributes, nextHandler);
        DecorateHandler includeHandler = new DecorateHandler(config);
        includeHandler.apply(ctx, parent);
    }

}