From 65ba13d0361be253ebe913b83c7345a811566cf5 Mon Sep 17 00:00:00 2001
From: Angus Kong <shkong@google.com>
Date: Mon, 27 Aug 2012 12:47:21 +0800
Subject: Add LightCycle helper class.

LightCycleHelper also receives event of package changes to get updated.

bug:6912297
Change-Id: Ib822ee778537b64986389bf8eeec36f61c9289f2
---
 .../android/gallery3d/common/LightCycleHelper.java | 79 ++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 gallerycommon/src/com/android/gallery3d/common/LightCycleHelper.java

diff --git a/gallerycommon/src/com/android/gallery3d/common/LightCycleHelper.java b/gallerycommon/src/com/android/gallery3d/common/LightCycleHelper.java
new file mode 100644
index 000000000..f8df29dd4
--- /dev/null
+++ b/gallerycommon/src/com/android/gallery3d/common/LightCycleHelper.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2012 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.gallery3d.common;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+
+public class LightCycleHelper {
+    public static final String LIGHTCYCLE_PACKAGE =
+            "com.google.android.apps.lightcycle";
+    public static final String LIGHTCYCLE_CAPTURE_CLASS =
+            "com.google.android.apps.lightcycle.PanoramaCaptureActivity";
+    public static final String LIGHTCYCLE_VIEW_CLASS =
+            "com.google.android.apps.lightcycle.PanoramaViewActivity";
+    public static final String EXTRA_OUTPUT_DIR = "output_dir";
+
+    private static boolean sUpdated;
+    private static boolean sHasViewActivity;
+    private static boolean sHasCaptureActivity;
+
+    private static boolean hasLightCycleActivity(PackageManager pm, String activityClass) {
+        Intent it = new Intent();
+        it.setClassName(LIGHTCYCLE_PACKAGE, activityClass);
+        return (pm.resolveActivity(it, 0) != null);
+    }
+
+    private static void update(PackageManager pm) {
+        sUpdated = true;
+        sHasViewActivity = hasLightCycleActivity(pm, LIGHTCYCLE_VIEW_CLASS);
+        sHasCaptureActivity = hasLightCycleActivity(pm, LIGHTCYCLE_CAPTURE_CLASS);
+    }
+
+    public synchronized static boolean hasLightCycleView(PackageManager pm) {
+        if (!sUpdated) {
+            update(pm);
+        }
+        return sHasViewActivity;
+    }
+
+    public synchronized static boolean hasLightCycleCapture(PackageManager pm) {
+        if (!sUpdated) {
+            update(pm);
+        }
+        return sHasCaptureActivity;
+    }
+
+    public synchronized static void onPackageAdded(Context context, String packageName) {
+        if (LIGHTCYCLE_PACKAGE.equals(packageName)) {
+            update(context.getPackageManager());
+        }
+    }
+
+    public synchronized static void onPackageRemoved(Context context, String packageName) {
+        if (LIGHTCYCLE_PACKAGE.equals(packageName)) {
+            update(context.getPackageManager());
+        }
+    }
+
+    public synchronized static void onPackageChanged(Context context, String packageName) {
+        if (LIGHTCYCLE_PACKAGE.equals(packageName)) {
+            update(context.getPackageManager());
+        }
+    }
+}
-- 
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