1 files changed, 175 insertions, 0 deletions
diff --git a/src/com/android/launcher3/compat/PackageInstallerCompatV16.java b/src/com/android/launcher3/compat/PackageInstallerCompatV16.java
new file mode 100644
index 000000000..1910d22ae
--- /dev/null
+++ b/src/com/android/launcher3/compat/PackageInstallerCompatV16.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2014 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.compat;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.launcher3.LauncherAppState;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.json.JSONStringer;
+import org.json.JSONTokener;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+
+public class PackageInstallerCompatV16 extends PackageInstallerCompat {
+
+    private static final String TAG = "PackageInstallerCompatV16";
+    private static final boolean DEBUG = false;
+
+    private static final String KEY_PROGRESS = "progress";
+    private static final String KEY_STATE = "state";
+
+    private static final String PREFS =
+            "com.android.launcher3.compat.PackageInstallerCompatV16.queue";
+
+    protected final SharedPreferences mPrefs;
+
+    boolean mUseQueue;
+    boolean mFinishedBind;
+    boolean mReplayPending;
+
+    PackageInstallerCompatV16(Context context) {
+        mPrefs = context.getSharedPreferences(PREFS, Context.MODE_PRIVATE);
+    }
+
+    @Override
+    public void onPause() {
+        mUseQueue = true;
+        if (DEBUG) Log.d(TAG, "updates paused");
+    }
+
+    @Override
+    public void onResume() {
+        mUseQueue = false;
+        if (mFinishedBind) {
+            replayUpdates();
+        }
+    }
+
+    @Override
+    public void onFinishBind() {
+        mFinishedBind = true;
+        if (!mUseQueue) {
+            replayUpdates();
+        }
+    }
+
+    @Override
+    public void onStop() { }
+
+    private void replayUpdates() {
+        if (DEBUG) Log.d(TAG, "updates resumed");
+        LauncherAppState app = LauncherAppState.getInstanceNoCreate();
+        if (app == null) {
+            mReplayPending = true; // try again later
+            if (DEBUG) Log.d(TAG, "app is null, delaying send");
+            return;
+        }
+        mReplayPending = false;
+        ArrayList<PackageInstallInfo> updates = new ArrayList<PackageInstallInfo>();
+        for (String packageName: mPrefs.getAll().keySet()) {
+            final String json = mPrefs.getString(packageName, null);
+            if (!TextUtils.isEmpty(json)) {
+                updates.add(infoFromJson(packageName, json));
+            }
+        }
+        if (!updates.isEmpty()) {
+            sendUpdate(app, updates);
+        }
+    }
+
+    /**
+     * This should be called by the implementations to register a package update.
+     */
+    @Override
+    public synchronized void recordPackageUpdate(String packageName, int state, int progress) {
+        SharedPreferences.Editor editor = mPrefs.edit();
+        PackageInstallInfo installInfo = new PackageInstallInfo(packageName);
+        installInfo.progress = progress;
+        installInfo.state = state;
+        if (state == STATUS_INSTALLED) {
+            // no longer necessary to track this package
+            editor.remove(packageName);
+            if (DEBUG) Log.d(TAG, "no longer tracking " + packageName);
+        } else {
+            editor.putString(packageName, infoToJson(installInfo));
+            if (DEBUG)
+                Log.d(TAG, "saved state: " + infoToJson(installInfo)
+                        + " for package: " + packageName);
+
+        }
+        editor.commit();
+
+        if (!mUseQueue) {
+            if (mReplayPending) {
+                replayUpdates();
+            } else if (state != STATUS_INSTALLED) {
+                LauncherAppState app = LauncherAppState.getInstanceNoCreate();
+                ArrayList<PackageInstallInfo> update = new ArrayList<PackageInstallInfo>();
+                update.add(installInfo);
+                sendUpdate(app, update);
+            }
+        }
+    }
+
+    private void sendUpdate(LauncherAppState app, ArrayList<PackageInstallInfo> updates) {
+        if (app == null) {
+            mReplayPending = true; // try again later
+            if (DEBUG) Log.d(TAG, "app is null, delaying send");
+        } else {
+            app.setPackageState(updates);
+        }
+    }
+
+    private static PackageInstallInfo infoFromJson(String packageName, String json) {
+        PackageInstallInfo info = new PackageInstallInfo(packageName);
+        try {
+            JSONObject object = (JSONObject) new JSONTokener(json).nextValue();
+            info.state = object.getInt(KEY_STATE);
+            info.progress = object.getInt(KEY_PROGRESS);
+        } catch (JSONException e) {
+            Log.e(TAG, "failed to deserialize app state update", e);
+        }
+        return info;
+    }
+
+    private static String infoToJson(PackageInstallInfo info) {
+        String value = null;
+        try {
+            JSONStringer json = new JSONStringer()
+                    .object()
+                    .key(KEY_STATE).value(info.state)
+                    .key(KEY_PROGRESS).value(info.progress)
+                    .endObject();
+            value = json.toString();
+        } catch (JSONException e) {
+            Log.e(TAG, "failed to serialize app state update", e);
+        }
+        return value;
+    }
+
+    @Override
+    public HashSet<String> updateAndGetActiveSessionCache() {
+        return new HashSet<String>();
+    }
+}