XmlEditorPanel.java

package be.selckin.swu.util.xml;

import be.selckin.swu.jquery.Javascripter;
import com.google.common.base.Supplier;
import nu.xom.Builder;
import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.markup.html.form.TextArea;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.request.resource.CssResourceReference;
import org.apache.wicket.request.resource.JavaScriptResourceReference;
import org.apache.wicket.request.resource.PackageResourceReference;

import static com.google.common.base.Preconditions.checkNotNull;

public class XmlEditorPanel extends Panel {
    private IModel<String> model;

    private boolean required = true;
    private TextArea<String> textArea;
    private Supplier<Builder> builderSupplier;

    public XmlEditorPanel(String id, Supplier<Builder> builderSupplier, IModel<String> model) {
        super(id, model);
        this.model = checkNotNull(model);
        this.builderSupplier = checkNotNull(builderSupplier);
        add(new Behavior() {
            @Override
            public void renderHead(Component component, IHeaderResponse response) {
                response.render(JavaScriptHeaderItem.forReference(new JavaScriptResourceReference(XmlEditorPanel.class, "codemirror-0.94.js")));
                response.render(JavaScriptHeaderItem.forReference(new JavaScriptResourceReference(XmlEditorPanel.class, "XmlEditorPanel.js")));
                response.render(CssHeaderItem.forReference(new CssResourceReference(XmlEditorPanel.class, "XmlEditorPanel.css")));
            }
        });
    }

    @Override
    protected void onInitialize() {
        super.onInitialize();

        textArea = new TextArea<String>("xml", model) {
            @Override
            public boolean isRequired() {
                return required;
            }
        };
        add(textArea.add(new XmlParseableValidator(builderSupplier)).setOutputMarkupId(true));
    }

    public boolean isRequired() {
        return required;
    }

    public XmlEditorPanel setRequired(boolean required) {
        this.required = required;
        return this;
    }

    @Override
    public void renderHead(IHeaderResponse response) {
        Javascripter.callFunction(response, "swu.xmlEditor.initXml", getUrl("codemirror_base-0.94.js"), getUrl("xmlcolors.css"), textArea.getMarkupId());
    }

    private CharSequence getUrl(String name) {
        return RequestCycle.get().urlFor(new PackageResourceReference(XmlEditorPanel.class, name), new PageParameters());
    }
}