org.ednovo.gooru.client.mvp.play.resource.body.WebResourceWidget.java Source code

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Here is the source code for org.ednovo.gooru.client.mvp.play.resource.body.WebResourceWidget.java

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/*******************************************************************************
 * Copyright 2013 Ednovo d/b/a Gooru. All rights reserved.
 * 
 *  http://www.goorulearning.org/
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ******************************************************************************/
package org.ednovo.gooru.client.mvp.play.resource.body;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.BodyElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.IFrameElement;
import com.google.gwt.dom.client.Style.Visibility;
import com.google.gwt.event.dom.client.HasLoadHandlers;
import com.google.gwt.event.dom.client.LoadEvent;
import com.google.gwt.event.dom.client.LoadHandler;
import com.google.gwt.event.logical.shared.HasInitializeHandlers;
import com.google.gwt.event.logical.shared.InitializeEvent;
import com.google.gwt.event.logical.shared.InitializeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Frame;

public class WebResourceWidget extends Composite implements HasInitializeHandlers, HasLoadHandlers {
    private Frame resourcePreviewFrame = null;

    public WebResourceWidget(String webResourceURL) {
        resourcePreviewFrame = new Frame(webResourceURL);
        initWidget(resourcePreviewFrame);
        resourcePreviewFrame.setSize("100%", "550px");
        resourcePreviewFrame.getElement().setAttribute("frameborder", "0");
        resourcePreviewFrame.getElement().setAttribute("vspace", "0");
        resourcePreviewFrame.getElement().setAttribute("hspace", "0");
        resourcePreviewFrame.removeStyleName("gwt-Frame");
        resourcePreviewFrame.getElement().getStyle().setBackgroundColor("white");
        resourcePreviewFrame.getElement().setAttribute("id", "resourcePlayerContainer");
    }

    public Frame getResourcePreviewFrame() {
        return resourcePreviewFrame;
    }

    public void setResourcePreviewFrame(Frame resourcePreviewFrame) {
        this.resourcePreviewFrame = resourcePreviewFrame;
    }

    public HandlerRegistration addInitializeHandler(InitializeHandler handler) {
        return addHandler(handler, InitializeEvent.getType());
    }

    @Override
    public void onLoad() {
        super.onLoad();
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            @Override
            public void execute() {
                //timer.schedule(100); 
                try {
                    Document document = IFrameElement.as(getResourcePreviewFrame().getElement())
                            .getContentDocument();
                    BodyElement body = document.getBody();
                    Element html = document.getDocumentElement();
                    /*getResourcePreviewFrame().getElement().getStyle().setVisibility(Visibility.HIDDEN);
                    getResourcePreviewFrame().getElement().getStyle().setPosition(Position.ABSOLUTE);*/
                    int bodyHeight = Math.max(body.getScrollHeight(), body.getOffsetHeight());
                    bodyHeight = Math.max(bodyHeight, html.getOffsetHeight());
                    bodyHeight = Math.max(bodyHeight, html.getClientHeight());
                    bodyHeight = Math.max(bodyHeight, html.getScrollHeight());
                    int scrollHeight = body.getScrollHeight();
                    getResourcePreviewFrame().getElement().getStyle().clearPosition();
                    getResourcePreviewFrame().getElement().getStyle().setVisibility(Visibility.VISIBLE);
                } catch (Exception e) {

                }
            }
        });
    }

    @Override
    public HandlerRegistration addLoadHandler(LoadHandler handler) {
        // TODO Auto-generated method stub
        return addHandler(handler, LoadEvent.getType());
    }

}