ca.travelagency.components.decorators.FieldDecorator.java Source code

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Here is the source code for ca.travelagency.components.decorators.FieldDecorator.java

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/**
 *    Copyright (C) 2010 - 2014 VREM Software Development <VREMSoftwareDevelopment@gmail.com>
 *
 *    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 ca.travelagency.components.decorators;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.IAjaxRegionMarkupIdProvider;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.feedback.FeedbackMessage;
import org.apache.wicket.feedback.FeedbackMessages;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.FormComponent;
import org.apache.wicket.request.Response;
import org.apache.wicket.util.string.Strings;

public class FieldDecorator extends Behavior implements IAjaxRegionMarkupIdProvider {
    private static final long serialVersionUID = 1L;

    private enum DisplayLabel {
        None, Inline, Above
    }

    private DisplayLabel displayLabel;

    public static FieldDecorator doNotDisplayLabel() {
        return new FieldDecorator(DisplayLabel.None);
    }

    public static FieldDecorator inlineDisplayLabel() {
        return new FieldDecorator(DisplayLabel.Inline);
    }

    public FieldDecorator() {
        this(DisplayLabel.Above);
    }

    private FieldDecorator(DisplayLabel displayLabel) {
        this.displayLabel = displayLabel;
    }

    @Override
    public void bind(Component component) {
        component.setOutputMarkupId(true);
    }

    @Override
    public void beforeRender(Component component) {
        FormComponent<?> formComponent = (FormComponent<?>) component;
        Response response = component.getResponse();

        response.write("<span id=\"");
        response.write(getAjaxRegionMarkupId(component));
        response.write("\">");

        String label = (formComponent.getLabel() != null) ? formComponent.getLabel().getObject() : null;
        if (!DisplayLabel.None.equals(displayLabel) && label != null) {
            response.write("<label for=\"");
            response.write(formComponent.getMarkupId());
            response.write("\" class=\"label");
            if (DisplayLabel.Inline.equals(displayLabel)) {
                response.write("Inline");
            }
            if (!formComponent.isValid()) {
                response.write(" error");
            }
            response.write("\">");
            response.write(Strings.escapeMarkup(label));
            if (formComponent.isRequired()) {
                response.write("<span class=\"required\">*</span>");
            }
            response.write("</label>");
        }

        super.beforeRender(component);
    }

    @Override
    public void afterRender(Component component) {
        Response response = component.getResponse();
        if (component.hasFeedbackMessage()) {
            response.write("<ul class=\"feedbackPanel\">");
            FeedbackMessages feedbackMessages = component.getFeedbackMessages();
            for (FeedbackMessage message : feedbackMessages) {
                response.write("<li class=\"feedbackPanel");
                response.write(message.getLevelAsString().toUpperCase());
                response.write("\">");
                response.write(Strings.escapeMarkup(message.getMessage().toString()));
                response.write("</li>");
                message.markRendered();
            }
            response.write("</ul>");
        }
        response.write("</span>");

        super.afterRender(component);
    }

    @Override
    public void onComponentTag(Component component, ComponentTag tag) {
        FormComponent<?> formComponent = (FormComponent<?>) component;
        if (formComponent.isValid()) {
            return;
        }
        String htmlClass = tag.getAttribute("class");
        if (htmlClass == null) {
            tag.put("class", "error");
        } else {
            tag.put("class", "error " + htmlClass);
        }
    }

    @Override
    public String getAjaxRegionMarkupId(Component component) {
        return component.getMarkupId() + "_fd";
    }
}