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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher2;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import java.util.HashMap;
/**
* Cache of application icons. Icons can be made from any thread.
*/
public class IconCache {
private static final String TAG = "Launcher.IconCache";
private static final int INITIAL_ICON_CACHE_CAPACITY = 50;
private static class CacheEntry {
public Bitmap icon;
public String title;
public Bitmap titleBitmap;
}
private final Bitmap mDefaultIcon;
private final LauncherApplication mContext;
private final PackageManager mPackageManager;
private final Utilities.BubbleText mBubble;
private final HashMap<ComponentName, CacheEntry> mCache =
new HashMap<ComponentName, CacheEntry>(INITIAL_ICON_CACHE_CAPACITY);
public IconCache(LauncherApplication context) {
mContext = context;
mPackageManager = context.getPackageManager();
mBubble = new Utilities.BubbleText(context);
mDefaultIcon = makeDefaultIcon();
}
private Bitmap makeDefaultIcon() {
Drawable d = mPackageManager.getDefaultActivityIcon();
Bitmap b = Bitmap.createBitmap(Math.max(d.getIntrinsicWidth(), 1),
Math.max(d.getIntrinsicHeight(), 1),
Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
d.setBounds(0, 0, b.getWidth(), b.getHeight());
d.draw(c);
return b;
}
/**
* Remove any records for the supplied ComponentName.
*/
public void remove(ComponentName componentName) {
synchronized (mCache) {
mCache.remove(componentName);
}
}
/**
* Empty out the cache.
*/
public void flush() {
synchronized (mCache) {
mCache.clear();
}
}
/**
* Fill in "application" with the icon and label for "info."
*/
public void getTitleAndIcon(ApplicationInfo application, ResolveInfo info) {
synchronized (mCache) {
CacheEntry entry = cacheLocked(application.componentName, info);
if (entry.titleBitmap == null) {
entry.titleBitmap = mBubble.createTextBitmap(entry.title);
}
application.title = entry.title;
application.titleBitmap = entry.titleBitmap;
application.iconBitmap = entry.icon;
}
}
public Bitmap getIcon(Intent intent) {
synchronized (mCache) {
final ResolveInfo resolveInfo = mPackageManager.resolveActivity(intent, 0);
ComponentName component = intent.getComponent();
if (resolveInfo == null || component == null) {
return mDefaultIcon;
}
CacheEntry entry = cacheLocked(component, resolveInfo);
return entry.icon;
}
}
public Bitmap getIcon(ComponentName component, ResolveInfo resolveInfo) {
synchronized (mCache) {
if (resolveInfo == null || component == null) {
return null;
}
CacheEntry entry = cacheLocked(component, resolveInfo);
return entry.icon;
}
}
private CacheEntry cacheLocked(ComponentName componentName, ResolveInfo info) {
CacheEntry entry = mCache.get(componentName);
if (entry == null) {
entry = new CacheEntry();
mCache.put(componentName, entry);
entry.title = info.loadLabel(mPackageManager).toString();
if (entry.title == null) {
entry.title = info.activityInfo.name;
}
entry.icon = Utilities.createIconBitmap(
info.activityInfo.loadIcon(mPackageManager), mContext);
}
return entry;
}
}
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