1 files changed, 133 insertions, 0 deletions
diff --git a/src/com/android/launcher3/PagedViewIconCache.java b/src/com/android/launcher3/PagedViewIconCache.java
new file mode 100644
index 000000000..0d03b5a52
--- /dev/null
+++ b/src/com/android/launcher3/PagedViewIconCache.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2011 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.launcher3;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ComponentName;
+import android.content.pm.ComponentInfo;
+import android.content.pm.ResolveInfo;
+import android.graphics.Bitmap;
+
+/**
+ * Simple cache mechanism for PagedView outlines.
+ */
+public class PagedViewIconCache {
+    public static class Key {
+        public enum Type {
+            ApplicationInfoKey,
+            AppWidgetProviderInfoKey,
+            ResolveInfoKey
+        }
+        private final ComponentName mComponentName;
+        private final Type mType;
+
+        public Key(ApplicationInfo info) {
+            mComponentName = info.componentName;
+            mType = Type.ApplicationInfoKey;
+        }
+        public Key(ResolveInfo info) {
+            final ComponentInfo ci = info.activityInfo != null ? info.activityInfo :
+                info.serviceInfo;
+            mComponentName = new ComponentName(ci.packageName, ci.name);
+            mType = Type.ResolveInfoKey;
+        }
+        public Key(AppWidgetProviderInfo info) {
+            mComponentName = info.provider;
+            mType = Type.AppWidgetProviderInfoKey;
+        }
+
+        private ComponentName getComponentName() {
+            return mComponentName;
+        }
+        public boolean isKeyType(Type t) {
+            return (mType == t);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o instanceof Key) {
+                Key k = (Key) o;
+                return mComponentName.equals(k.mComponentName);
+            }
+            return super.equals(o);
+        }
+        @Override
+        public int hashCode() {
+            return getComponentName().hashCode();
+        }
+    }
+
+    private final HashMap<Key, Bitmap> mIconOutlineCache = new HashMap<Key, Bitmap>();
+
+    public void clear() {
+        for (Key key : mIconOutlineCache.keySet()) {
+            mIconOutlineCache.get(key).recycle();
+        }
+        mIconOutlineCache.clear();
+    }
+    private void retainAll(HashSet<Key> keysToKeep, Key.Type t) {
+        HashSet<Key> keysToRemove = new HashSet<Key>(mIconOutlineCache.keySet());
+        keysToRemove.removeAll(keysToKeep);
+        for (Key key : keysToRemove) {
+            if (key.isKeyType(t)) {
+                mIconOutlineCache.get(key).recycle();
+                mIconOutlineCache.remove(key);
+            }
+        }
+    }
+    /** Removes all the keys to applications that aren't in the passed in collection */
+    public void retainAllApps(ArrayList<ApplicationInfo> keys) {
+        HashSet<Key> keysSet = new HashSet<Key>();
+        for (ApplicationInfo info : keys) {
+            keysSet.add(new Key(info));
+        }
+        retainAll(keysSet, Key.Type.ApplicationInfoKey);
+    }
+    /** Removes all the keys to shortcuts that aren't in the passed in collection */
+    public void retainAllShortcuts(List<ResolveInfo> keys) {
+        HashSet<Key> keysSet = new HashSet<Key>();
+        for (ResolveInfo info : keys) {
+            keysSet.add(new Key(info));
+        }
+        retainAll(keysSet, Key.Type.ResolveInfoKey);
+    }
+    /** Removes all the keys to widgets that aren't in the passed in collection */
+    public void retainAllAppWidgets(List<AppWidgetProviderInfo> keys) {
+        HashSet<Key> keysSet = new HashSet<Key>();
+        for (AppWidgetProviderInfo info : keys) {
+            keysSet.add(new Key(info));
+        }
+        retainAll(keysSet, Key.Type.AppWidgetProviderInfoKey);
+    }
+    public void addOutline(Key key, Bitmap b) {
+        mIconOutlineCache.put(key, b);
+    }
+    public void removeOutline(Key key) {
+        if (mIconOutlineCache.containsKey(key)) {
+            mIconOutlineCache.get(key).recycle();
+            mIconOutlineCache.remove(key);
+        }
+    }
+    public Bitmap getOutline(Key key) {
+        return mIconOutlineCache.get(key);
+    }
+}