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/*******************************************************************************
* Copyright (c) 2011 GitHub Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Kevin Sawicki (GitHub Inc.) - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.github.ui;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.net.URL;
import java.net.URLConnection;
import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageLoader;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.PlatformUI;
/**
* Stores Avatars
*/
public class AvatarStore implements Serializable, ISchedulingRule {
/**
* Callback interface for avatar image data loaded
*/
public interface IAvatarCallback {
/**
* Avatar loaded
*
* @param data
* @param store
*/
void loaded(ImageData data, AvatarStore store);
}
/**
* serialVersionUID
*/
private static final long serialVersionUID = -7791322302733784441L;
/**
* TIMEOUT
*/
public static final int TIMEOUT = 30 * 1000;
/**
* BUFFER_SIZE
*/
public static final int BUFFER_SIZE = 8192;
private Map<String, byte[]> avatars = new HashMap<>();
/**
* Get cached avatar image data
*
* @param url
* @return image data or null if not present in store
*/
public ImageData getAvatar(String url) {
ImageData data = null;
url = normalize(url);
if (url != null) {
byte[] cached = this.avatars.get(url);
if (cached != null)
data = getData(cached);
}
return data;
}
/**
* Normalize url removing query parameters
*
* @param url
* @return normalized
*/
protected String normalize(String url) {
try {
URL parsed = new URL(url);
parsed = new URL(parsed.getProtocol(), parsed.getHost(),
parsed.getPath());
return parsed.toExternalForm();
} catch (IOException e) {
return null;
}
}
/**
* Load avatar
*
* @param url
* @param callback
*/
public void loadAvatar(final String url, final IAvatarCallback callback) {
Job job = new Job(MessageFormat.format("Loading avatar for {0}", url)) { //$NON-NLS-1$
@Override
protected IStatus run(IProgressMonitor monitor) {
try {
ImageData data = loadAvatar(url);
if (data != null)
callback.loaded(data, AvatarStore.this);
} catch (IOException ignore) {
// Ignored
}
return Status.OK_STATUS;
}
};
job.schedule();
}
/**
* Load avatar image data from url
*
* @param url
* @return avatar image data
* @throws IOException
*/
public ImageData loadAvatar(String url) throws IOException {
url = normalize(url);
URL parsed = new URL(url);
byte[] data = this.avatars.get(url);
if (data != null)
return getData(data);
URLConnection connection = parsed.openConnection();
connection.setConnectTimeout(TIMEOUT);
ByteArrayOutputStream output = new ByteArrayOutputStream();
InputStream input = connection.getInputStream();
try {
byte[] buffer = new byte[BUFFER_SIZE];
int read = input.read(buffer);
while (read != -1) {
output.write(buffer, 0, read);
read = input.read(buffer);
}
} finally {
try {
input.close();
} catch (IOException ignore) {
// Ignored
}
try {
output.close();
} catch (IOException ignore) {
// Ignored
}
}
data = output.toByteArray();
this.avatars.put(url, data);
return getData(data);
}
/**
* Get scaled image
*
* @param size
* @param data
* @return image data scaled to specified size
*/
public Image getScaledImage(int size, ImageData data) {
Display display = PlatformUI.getWorkbench().getDisplay();
Image image = new Image(display, data);
Rectangle sourceBounds = image.getBounds();
// Return original image and don't scale if size matches request
if (sourceBounds.width == size)
return image;
Image scaled = new Image(display, size, size);
GC gc = new GC(scaled);
try {
gc.setAntialias(SWT.ON);
gc.setInterpolation(SWT.HIGH);
Rectangle targetBounds = scaled.getBounds();
gc.drawImage(image, 0, 0, sourceBounds.width, sourceBounds.height,
0, 0, targetBounds.width, targetBounds.height);
} finally {
gc.dispose();
image.dispose();
}
return scaled;
}
/**
* Get avatar image data
*
* @param bytes
* @return image data
*/
public ImageData getData(byte[] bytes) {
ByteArrayInputStream stream = new ByteArrayInputStream(bytes);
try {
ImageData[] images = new ImageLoader().load(stream);
if (images.length > 0)
return images[0];
} finally {
try {
stream.close();
} catch (IOException ignore) {
// Ignored
}
}
return null;
}
/**
* @see org.eclipse.core.runtime.jobs.ISchedulingRule#contains(org.eclipse.core.runtime.jobs.ISchedulingRule)
*/
@Override
public boolean contains(ISchedulingRule rule) {
return this == rule;
}
/**
* @see org.eclipse.core.runtime.jobs.ISchedulingRule#isConflicting(org.eclipse.core.runtime.jobs.ISchedulingRule)
*/
@Override
public boolean isConflicting(ISchedulingRule rule) {
return this == rule;
}
}
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