org.apache.tapestry5.corelib.components.RemoveRowLink Maven / Gradle / Ivy

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Central module for Tapestry, containing interfaces to the Java Servlet API and all core services and components.

There is a newer version: 5.8.6

// Copyright 2008, 2010 The Apache Software Foundation
//
// 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.apache.tapestry5.corelib.components;

import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.annotations.Environmental;
import org.apache.tapestry5.annotations.SupportsInformalParameters;
import org.apache.tapestry5.corelib.internal.AjaxFormLoopContext;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;

/**
 * Used inside a {@link org.apache.tapestry5.corelib.components.AjaxFormLoop} to remove the current row from the loop.
 * This fires a server-side event (from the AjaxFormLoop component); the event context is the object to be removed. On
 * the client-side, the element for the row is hidden, then removed altogether.
 */
@SupportsInformalParameters
public class RemoveRowLink
{
    @Inject
    private ComponentResources resources;

    @Environmental
    private AjaxFormLoopContext context;

    @Environmental
    private JavaScriptSupport jsSupport;

    void beginRender(MarkupWriter writer)
    {
        String clientId = jsSupport.allocateClientId(resources);

        writer.element("a",

        "href", "#",

        "id", clientId);

        resources.renderInformalParameters(writer);

        context.addRemoveRowTrigger(clientId);
    }

    void afterRender(MarkupWriter writer)
    {
        writer.end();
    }
}