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/*******************************************************************************
* Copyright (c) 2004, 2008 Tasktop Technologies 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:
* Jeff Pound - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.wizards;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.mylyn.internal.tasks.core.LocalAttachment;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.ScrollBar;
import org.eclipse.swt.widgets.Text;
/**
* Shows a preview of a LocalAttachment.
*
* @author Jeff Pound
*/
/**
* @deprecated Do not use. This class is pending for removal: see bug 237552.
*/
@Deprecated
public class PreviewAttachmentPage extends WizardPage {
private static final String PAGE_NAME = "PreviewAttachmentPage";
private static final String TITLE = "Attachment Preview";
private static final String DESCRIPTION = "Review the attachment before submitting";
private final LocalAttachment attachment;
private static HashMap<String, String> textTypes;
private static HashMap<String, String> imageTypes;
private ScrolledComposite scrolledComposite;
static {
textTypes = new HashMap<String, String>();
imageTypes = new HashMap<String, String>();
textTypes.put("text/plain", "");
textTypes.put("text/html", "");
textTypes.put("text/html", "");
textTypes.put("application/xml", "");
imageTypes.put("image/jpeg", "");
imageTypes.put("image/gif", "");
imageTypes.put("image/png", "");
}
private static boolean isTextAttachment(String contentType) {
return textTypes.get(contentType) != null;
}
private static boolean isImageAttachment(String contentType) {
return imageTypes.get(contentType) != null;
}
protected PreviewAttachmentPage(LocalAttachment attachment) {
super(PAGE_NAME);
setTitle(TITLE);
setDescription(DESCRIPTION);
this.attachment = attachment;
}
public void createControl(Composite parent) {
Composite composite = new Composite(parent, SWT.NONE);
composite.setLayout(new GridLayout());
setControl(composite);
if (attachment instanceof ImageAttachment) {
try {
getContainer().run(true, false, new IRunnableWithProgress() {
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
monitor.beginTask("Preparing image for preview...", 1);
((ImageAttachment) attachment).ensureImageFileWasCreated();
monitor.worked(1);
monitor.done();
}
});
} catch (InvocationTargetException e) {
createErrorPreview(composite, "Could not create image for preview");
return;
} catch (InterruptedException e) {
createErrorPreview(composite, "Could not create image for preview");
return;
}
}
if (InputAttachmentSourcePage.CLIPBOARD_LABEL.equals(attachment.getFilePath())) {
createTextPreview(composite, ((NewAttachmentWizard) getWizard()).getClipboardContents());
} else if (PreviewAttachmentPage.isTextAttachment(attachment.getContentType())) {
createTextPreview(composite, attachment);
} else if (PreviewAttachmentPage.isImageAttachment(attachment.getContentType())) {
createImagePreview(composite, attachment);
} else {
createGenericPreview(composite, attachment);
}
}
private void createTextPreview(Composite composite, String contents) {
Text text = new Text(composite, SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
GridData gd = new GridData(GridData.FILL_BOTH);
gd.heightHint = composite.getBounds().y;
gd.widthHint = composite.getBounds().x;
text.setLayoutData(gd);
text.setText(contents);
}
private void createTextPreview(Composite composite, LocalAttachment attachment) {
try {
StringBuffer content = new StringBuffer();
BufferedReader in = new BufferedReader(new FileReader(new File(attachment.getFilePath())));
String line;
while ((line = in.readLine()) != null) {
content.append(line);
content.append("\n");
}
in.close();
createTextPreview(composite, content.toString());
} catch (FileNotFoundException e) {
createErrorPreview(composite, "Could not locate file '" + attachment.getFilePath() + "'");
} catch (IOException e) {
createErrorPreview(composite, "Error reading file '" + attachment.getFilePath() + "'");
}
}
private void createImagePreview(Composite composite, LocalAttachment attachment) {
// Uses double buffering to paint the image; there was a weird behavior
// with transparent images and flicker with large images
Image originalImage = new Image(composite.getDisplay(), attachment.getFilePath());
final Image bufferedImage = new Image(composite.getDisplay(), originalImage.getBounds());
GC gc = new GC(bufferedImage);
gc.setBackground(composite.getBackground());
gc.fillRectangle(originalImage.getBounds());
gc.drawImage(originalImage, 0, 0);
gc.dispose();
originalImage.dispose();
scrolledComposite = new ScrolledComposite(composite, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
scrolledComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());
scrolledComposite.setExpandHorizontal(true);
scrolledComposite.setExpandVertical(true);
Composite canvasComposite = new Composite(scrolledComposite, SWT.NONE);
canvasComposite.setLayout(GridLayoutFactory.fillDefaults().create());
Canvas canvas = new Canvas(canvasComposite, SWT.NO_BACKGROUND);
final Rectangle imgSize = bufferedImage.getBounds();
canvas.setLayoutData(GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).grab(true, true).hint(
imgSize.width, imgSize.height).create());
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
e.gc.drawImage(bufferedImage, 0, 0);
}
});
canvas.addDisposeListener(new DisposeListener() {
public void widgetDisposed(DisposeEvent e) {
bufferedImage.dispose();
}
});
canvas.setSize(imgSize.width, imgSize.height);
scrolledComposite.setMinSize(imgSize.width, imgSize.height);
scrolledComposite.setContent(canvasComposite);
scrolledComposite.addControlListener(new ControlAdapter() {
@Override
public void controlResized(ControlEvent e) {
adjustScrollbars(imgSize);
}
});
adjustScrollbars(imgSize);
}
private void adjustScrollbars(Rectangle imgSize) {
Rectangle clientArea = scrolledComposite.getClientArea();
ScrollBar hBar = scrolledComposite.getHorizontalBar();
hBar.setMinimum(0);
hBar.setMaximum(imgSize.width - 1);
hBar.setPageIncrement(clientArea.width);
hBar.setIncrement(10);
ScrollBar vBar = scrolledComposite.getVerticalBar();
vBar.setMinimum(0);
vBar.setMaximum(imgSize.height - 1);
vBar.setPageIncrement(clientArea.height);
vBar.setIncrement(10);
}
private void createGenericPreview(Composite composite, LocalAttachment attachment) {
Label label = new Label(composite, SWT.NONE);
label.setLayoutData(new GridData(GridData.FILL_BOTH));
label.setText("Attaching File '" + attachment.getFilePath() + "'\nA preview the type '"
+ attachment.getContentType() + "' is currently not available");
}
private void createErrorPreview(Composite composite, String message) {
Label label = new Label(composite, SWT.NONE);
label.setLayoutData(new GridData(GridData.FILL_BOTH));
label.setText(message);
}
}
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