package org.eclipse.osbp.runtime.web.vaadin.components.fields.client;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.HTML;
import com.vaadin.client.ApplicationConnection;
import com.vaadin.client.Util;
import com.vaadin.client.ui.Icon;
import com.vaadin.shared.ui.BorderStyle;

public class VEntityLink extends HTML implements ClickHandler {

	public static final String CLASSNAME = "l-entitylink";

	@Deprecated
	protected static final BorderStyle BORDER_STYLE_DEFAULT = BorderStyle.DEFAULT;

	@Deprecated
	protected static final BorderStyle BORDER_STYLE_MINIMAL = BorderStyle.MINIMAL;

	@Deprecated
	protected static final BorderStyle BORDER_STYLE_NONE = BorderStyle.NONE;

	/** For internal use only. May be removed or replaced in the future. */
	public String src;

	/** For internal use only. May be removed or replaced in the future. */
	public String target;

	/** For internal use only. May be removed or replaced in the future. */
	public BorderStyle borderStyle = BorderStyle.DEFAULT;

	/** For internal use only. May be removed or replaced in the future. */
	public boolean enabled;

	/** For internal use only. May be removed or replaced in the future. */
	public int targetWidth;

	/** For internal use only. May be removed or replaced in the future. */
	public int targetHeight;

	/** For internal use only. May be removed or replaced in the future. */
	public Element errorIndicatorElement;

	/** For internal use only. May be removed or replaced in the future. */
	public final Element anchor = DOM.createAnchor();

	/** For internal use only. May be removed or replaced in the future. */
	public final Element captionElement = DOM.createSpan();

	/** For internal use only. May be removed or replaced in the future. */
	public Icon icon;

	/** For internal use only. May be removed or replaced in the future. */
	public ApplicationConnection client;

	public VEntityLink() {
		super();
		getElement().appendChild(anchor);
		anchor.appendChild(captionElement);
		addClickHandler(this);
		setStyleName(CLASSNAME);
	}

	@Override
	public void onClick(ClickEvent event) {
		if (enabled) {
			if (target == null) {
				target = "_self";
			}
			String features;
			switch (borderStyle) {
			case NONE:
				features = "menubar=no,location=no,status=no";
				break;
			case MINIMAL:
				features = "menubar=yes,location=no,status=no";
				break;
			default:
				features = "";
				break;
			}

			if (targetWidth > 0) {
				features += (features.length() > 0 ? "," : "") + "width="
						+ targetWidth;
			}
			if (targetHeight > 0) {
				features += (features.length() > 0 ? "," : "") + "height="
						+ targetHeight;
			}

			if (features.length() > 0) {
				// if 'special features' are set, use window.open(), unless
				// a modifier key is held (ctrl to open in new tab etc)
				Event e = DOM.eventGetCurrentEvent();
				if (!e.getCtrlKey() && !e.getAltKey() && !e.getShiftKey()
						&& !e.getMetaKey()) {
					Window.open(src, target, features);
					e.preventDefault();
				}
			}
		}
	}

	@Override
	public void onBrowserEvent(Event event) {
		final Element target = DOM.eventGetTarget(event);
		if (event.getTypeInt() == Event.ONLOAD) {
			Util.notifyParentOfSizeChange(this, true);
		}
		if (target == captionElement || target == anchor
				|| (icon != null && target == icon.getElement())) {
			super.onBrowserEvent(event);
		}
		if (!enabled) {
			event.preventDefault();
		}

	}

}