plugins/org.eclipse.actf.visualization.blind/src/org/eclipse/actf/visualization/blind/ui/internal/BlindVisualizationBrowser.java

/*******************************************************************************
 * Copyright (c) 2004, 2011 IBM Corporation and Others
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kentarou FUKUDA - initial API and implementation
 *******************************************************************************/

package org.eclipse.actf.visualization.blind.ui.internal;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.ole.win32.OLE;
import org.eclipse.swt.ole.win32.OleAutomation;
import org.eclipse.swt.ole.win32.OleControlSite;
import org.eclipse.swt.ole.win32.OleFrame;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.swt.widgets.Composite;


public class BlindVisualizationBrowser {

    private final static String WEBBROWSER_CONTROL_NAME = "Shell.Explorer"; //$NON-NLS-1$

    private final static String NAVIGATE_METHOD_NAME = "Navigate"; //$NON-NLS-1$

    private final static String URL_PARAM_NAME = "URL"; //$NON-NLS-1$

    private final static Variant[] ARG_CLEAR_HIGHLIGHT = new Variant[] { new Variant("clearHighlight();") }; //$NON-NLS-1$

    private OleAutomation oleAutomationIE;

    private OleAutomation ieWindowAutomation = null;

    private int id_exec_script;

    private int id_navigate;

    private int[] id_url_param;

    public BlindVisualizationBrowser(Composite parent) {

        GridLayout gridLayout = new GridLayout();
        gridLayout.marginHeight = gridLayout.marginWidth = 0;
        gridLayout.horizontalSpacing = gridLayout.verticalSpacing = 0;
        parent.setLayout(gridLayout);

        // Web browser
        OleFrame webFrame = new OleFrame(parent, SWT.NONE);
        OleControlSite webControlSite = new OleControlSite(webFrame, SWT.NONE, WEBBROWSER_CONTROL_NAME);
        oleAutomationIE = new OleAutomation(webControlSite);

        // enable OLE
        webControlSite.doVerb(OLE.OLEIVERB_INPLACEACTIVATE);

        // init ids
        int[] rgdispid = oleAutomationIE.getIDsOfNames(new String[] { NAVIGATE_METHOD_NAME, URL_PARAM_NAME });
        id_navigate = rgdispid[0];
        id_url_param = new int[1];
        id_url_param[0] = rgdispid[1];

        GridData gridData2 = new GridData();
        gridData2.horizontalAlignment = GridData.FILL;
        gridData2.grabExcessHorizontalSpace = true;
        gridData2.verticalAlignment = GridData.FILL;
        gridData2.grabExcessVerticalSpace = true;
        webFrame.setLayoutData(gridData2);

    }

    protected void setBrowserSilent() {
        int[] rgdispid = oleAutomationIE.getIDsOfNames(new String[] { "Silent" }); //$NON-NLS-1$
        int dispIdMember = rgdispid[0];
        Variant varSilent = new Variant((short) 1); // set to true (0 = false)
        oleAutomationIE.setProperty(dispIdMember, varSilent);
    }

    protected void disposeOleBrowser() {
        if (oleAutomationIE != null) {
            oleAutomationIE.dispose();
        }
    }

    // Display the result HTML in blind IE
    // Checked:
    protected void navigate(String url) {

        Variant[] rgvarg = new Variant[1];
        rgvarg[0] = new Variant(url);

        // Variant pVarResult =
        oleAutomationIE.invoke(id_navigate, rgvarg, id_url_param);
    }


    private boolean initWindowAutomation() {
        if (ieWindowAutomation == null) {
            try {
                // get IE WindowAutomation
                int[] rgdispid = oleAutomationIE.getIDsOfNames(new String[] { "Document" }); //$NON-NLS-1$
                int dispIdMember = rgdispid[0];
                Variant result = oleAutomationIE.getProperty(dispIdMember);
                OleAutomation htmlDocumentAutomation = result.getAutomation();
                rgdispid = htmlDocumentAutomation.getIDsOfNames(new String[] { "parentWindow" }); //$NON-NLS-1$
                dispIdMember = rgdispid[0];
                result = htmlDocumentAutomation.getProperty(dispIdMember);
                ieWindowAutomation = result.getAutomation();

                rgdispid = ieWindowAutomation.getIDsOfNames(new String[] { "execScript" }); //$NON-NLS-1$
                id_exec_script = rgdispid[0];
            } catch (Exception e) {
                return false;
            }
        }
        return true;
    }

    protected void execScript(String str) {
        if (initWindowAutomation()) {
            Variant[] rgvarg = new Variant[1];
            rgvarg[0] = new Variant(str);

            if(ieWindowAutomation.invoke(id_exec_script, rgvarg)==null){
            	//try again
            	ieWindowAutomation = null;
            	if(initWindowAutomation()){
            		ieWindowAutomation.invoke(id_exec_script, rgvarg);
            	}
            }
        }
    }

    protected void clearHighlight() {
        if (initWindowAutomation()) {
            ieWindowAutomation.invoke(id_exec_script, ARG_CLEAR_HIGHLIGHT);
        }
    }

}