/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.arsdigita.cms.ui;

import com.arsdigita.bebop.PageState;
import com.arsdigita.bebop.Resettable;
import com.arsdigita.bebop.SimpleContainer;
import com.arsdigita.cms.ImageAsset;
import com.arsdigita.cms.Service;
import com.arsdigita.web.URL;
import com.arsdigita.xml.Element;

/**
 * A component which will insert a javascript to the xml output with the image
 * information for the OpenCCM plugin for Xinha editor.
 *
 * @author Sören Bernstein <quasi@quasiweb.de>
 */
public class ImageSelectResultComponent extends SimpleContainer
	implements Resettable {

	boolean m_valid = false;
	ImageAsset m_image;
	String m_lastImageComponent;

	public ImageSelectResultComponent() {
		super();
	}

	/**
	 * Save image imformation
	 *
	 * @param image an {@link ImageAsset}
	 */
	public void setResult(final ImageAsset image, final String lastComponent) {
		m_image = image;
		m_lastImageComponent = lastComponent;
		m_valid = (m_image != null);
	}

	/**
	 * Insert a script tag to the xml output with a JavaScript function to
	 * send the image information back to the Xinha plugin.
	 *
	 * @param state The current {@link PageState}
	 * @param parent The parent {@link Element}
	 */
	@Override
	public void generateXML(PageState state, Element parent) {

		Element scriptElem = parent.newChildElement("script");
		scriptElem.addAttribute("type", "text/javascript");

		StringBuilder script = new StringBuilder(1000);

		// Create function
		script.append("function selectImage(button) {");

		// If there is a valid image
		if (m_valid) {

			// If in library mode, only listen to save button
			if (m_lastImageComponent.equals(ImageComponent.LIBRARY)) {
				script.append("if(button.id != \"save\" ) { return false; } ");
			}

			// Send image parameters to xinha plugin
			script.append("window.opener.openCCM.imageSet({");
			script.append("      src    : \"");
			script.append(URL.getDispatcherPath());
			script.append(Service.getImageURL(m_image));
			script.append("\", ");
			script.append("      name   : \"");
			script.append(m_image.getDisplayName());
			script.append("\", ");
			script.append("      width   : \"");
			script.append(m_image.getWidth());
			script.append("\", ");
			script.append("      height   : \"");
			script.append(m_image.getHeight());
			script.append("\"");
			script.append("});");

			// Close window
			script.append("self.close();");

		}
		script.append("return false;");
		script.append("}");

		// If in upload mode and if there is a valid image, execute the
		// javascript function
		if (m_valid && ImageComponent.UPLOAD.equals(m_lastImageComponent)) {
			script.append("selectImage();");
		}

		scriptElem.setText(script.toString());

		// Reset ImageSelectResultComponent
		reset(state);
	}

	/**
	 * Reset this component.
	 *
	 * @param state Page state
	 */
	@Override
	public void reset(PageState state) {
		setResult(null, null);
	}
}