com.aptana.preview.internal.PreviewEditorPart.java Source code

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Here is the source code for com.aptana.preview.internal.PreviewEditorPart.java

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/**
 * Aptana Studio
 * Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the GNU Public License (GPL) v3 (with exceptions).
 * Please see the license.html included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */

package com.aptana.preview.internal;

import java.net.URL;
import java.text.MessageFormat;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IStatusLineManager;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;
import org.eclipse.swt.browser.TitleEvent;
import org.eclipse.swt.browser.TitleListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IReusableEditor;
import org.eclipse.ui.IShowEditorInput;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.EditorPart;

import com.aptana.browser.WebBrowserViewer;

/**
 * @author Max Stepanov
 * 
 */
public final class PreviewEditorPart extends EditorPart implements IReusableEditor, IShowEditorInput {

    public static final String EDITOR_ID = "com.aptana.preview.editor"; //$NON-NLS-1$

    protected WebBrowserViewer webBrowser;
    private int progressWorked;
    private String initialURL;
    private Image image;
    private boolean disposed;

    /*
     * (non-Javadoc)
     * 
     * @seeorg.eclipse.ui.part.EditorPart#doSave(org.eclipse.core.runtime.
     * IProgressMonitor)
     */
    @Override
    public void doSave(IProgressMonitor monitor) {
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.EditorPart#doSaveAs()
     */
    @Override
    public void doSaveAs() {
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.EditorPart#init(org.eclipse.ui.IEditorSite,
     * org.eclipse.ui.IEditorInput)
     */
    @Override
    public void init(IEditorSite site, IEditorInput input) throws PartInitException {
        setSite(site);
        super.setInput(input);
        showEditorInput();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.WorkbenchPart#dispose()
     */
    @Override
    public void dispose() {
        if (image != null && !image.isDisposed()) {
            image.dispose();
            image = null;
        }
        super.dispose();
        disposed = true;
    }

    public boolean isDisposed() {
        return disposed;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.EditorPart#isDirty()
     */
    @Override
    public boolean isDirty() {
        return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.EditorPart#isSaveAsAllowed()
     */
    @Override
    public boolean isSaveAsAllowed() {
        return false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets
     * .Composite)
     */
    @Override
    public void createPartControl(Composite parent) {
        int style = WebBrowserViewer.NAVIGATION_BAR;
        webBrowser = new WebBrowserViewer(parent, style);
        webBrowser.addProgressListener(new ProgressListener() {
            public void changed(ProgressEvent event) {
                if (event.total == 0) {
                    return;
                }
                if (event.current == 0) {
                    IProgressMonitor progressMonitor = getStatusBarProgressMonitor();
                    progressMonitor.done();
                    progressMonitor.beginTask("", event.total); //$NON-NLS-1$
                    progressWorked = 0;
                }
                if (progressWorked < event.current) {
                    getStatusBarProgressMonitor().worked(event.current - progressWorked);
                    progressWorked = event.current;
                }
            }

            public void completed(ProgressEvent event) {
                getStatusBarProgressMonitor().done();
            }
        });
        webBrowser.addTitleListener(new TitleListener() {
            public void changed(TitleEvent event) {
                setTitleToolTip(event.title);
            }
        });
        webBrowser.setURL(initialURL);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.part.WorkbenchPart#setFocus()
     */
    @Override
    public void setFocus() {
        if (webBrowser != null) {
            webBrowser.setFocus();
        }
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.part.EditorPart#setInput(org.eclipse.ui.IEditorInput)
     */
    @Override
    public void setInput(IEditorInput input) {
        super.setInput(input);
        showEditorInput();
        firePropertyChange(PROP_INPUT);
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.ui.IShowEditorInput#showEditorInput(org.eclipse.ui.IEditorInput
     * )
     */
    public void showEditorInput(IEditorInput editorInput) {
        setInput(editorInput);
    }

    private void showEditorInput() {
        PreviewEditorInput pei = getPreviewEditorInput();
        if (pei != null) {
            initialURL = null;
            URL url = pei.getURL();
            if (url != null)
                initialURL = url.toExternalForm();
            if (webBrowser != null) {
                webBrowser.setURL(initialURL);
            }

            setPartName(MessageFormat.format(Messages.PreviewEditorPart_Title, pei.getName()));
            setTitleToolTip(pei.getToolTipText());
            Image oldImage = image;
            ImageDescriptor id = pei.getImageDescriptor();
            image = id.createImage();

            setTitleImage(image);
            if (oldImage != null && !oldImage.isDisposed())
                oldImage.dispose();
        }
    }

    private IProgressMonitor getStatusBarProgressMonitor() {
        IStatusLineManager statusLineManager = getEditorSite().getActionBars().getStatusLineManager();
        return statusLineManager.getProgressMonitor();
    }

    public boolean close() {
        final boolean[] result = new boolean[1];
        Display.getDefault().asyncExec(new Runnable() {
            public void run() {
                result[0] = getEditorSite().getPage().closeEditor(PreviewEditorPart.this, false);
            }
        });
        return result[0];
    }

    protected PreviewEditorInput getPreviewEditorInput() {
        IEditorInput input = getEditorInput();
        if (input instanceof PreviewEditorInput)
            return (PreviewEditorInput) input;
        return null;
    }

}