Clean up lock screen hide animation.

We now have an animation to apply to the thing behind the lock
screen animation when it isn't on the wallpaper, which looks
similar to the animation we use when both are on the wallpaper.

In implementing this, cleaned up the code to figure out up-front
which animation to run, getting rid of that kludgy thing that
cleared the window animation if the wallpaper was not being used
for the lower windows.

Change-Id: Ifc4c8a8894ad384124dcf4bbdaab134f1157b0f3

Author: Dianne Hackborn

core/java/android/view/WindowManagerPolicy.java

@@ -667,7 +667,7 @@ public int prepareAddWindowLw(WindowState win,
     /**
      * Create and return an animation to re-display a force hidden window.
      */
-    public Animation createForceHideEnterAnimation();
+    public Animation createForceHideEnterAnimation(boolean onWallpaper);
 
     /**
      * Called from the input reader thread before a key is enqueued.

core/res/res/anim/lock_screen_behind_enter.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
 /*
-** Copyright 2007, The Android Open Source Project
+** Copyright 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.
@@ -18,7 +18,7 @@
 -->
 
 <set xmlns:android="http://schemas.android.com/apk/res/android"
-    android:detachWallpaper="true" android:shareInterpolator="false">
+    android:background="#ff000000" android:shareInterpolator="false">
     <scale
         android:fromXScale="0.95" android:toXScale="1.0"
         android:fromYScale="0.95" android:toYScale="1.0"

core/res/res/anim/lock_screen_wallpaper_behind_enter.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright 2007, 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.
+*/
+-->
+
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:detachWallpaper="true" android:shareInterpolator="false">
+    <scale
+        android:fromXScale="0.95" android:toXScale="1.0"
+        android:fromYScale="0.95" android:toYScale="1.0"
+        android:pivotX="50%p" android:pivotY="50%p"
+        android:fillEnabled="true" android:fillBefore="true"
+        android:interpolator="@interpolator/decelerate_cubic"
+        android:startOffset="@android:integer/config_shortAnimTime"
+        android:duration="@android:integer/config_shortAnimTime" />
+    <alpha
+        android:fromAlpha="0.0" android:toAlpha="1.0"
+        android:fillEnabled="true" android:fillBefore="true"
+        android:interpolator="@interpolator/decelerate_quad"
+        android:startOffset="@android:integer/config_shortAnimTime"
+        android:duration="@android:integer/config_shortAnimTime"/>
+</set>

core/res/res/values/public.xml

@@ -1133,6 +1133,7 @@
   <!-- From android.policy -->
   <java-symbol type="anim" name="app_starting_exit" />
   <java-symbol type="anim" name="lock_screen_behind_enter" />
+  <java-symbol type="anim" name="lock_screen_wallpaper_behind_enter" />
   <java-symbol type="anim" name="dock_top_enter" />
   <java-symbol type="anim" name="dock_top_exit" />
   <java-symbol type="anim" name="dock_bottom_enter" />

policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

@@ -1628,9 +1628,10 @@ public int selectAnimationLw(WindowState win, int transit) {
         return 0;
     }
 
-    public Animation createForceHideEnterAnimation() {
-        return AnimationUtils.loadAnimation(mContext,
-                com.android.internal.R.anim.lock_screen_behind_enter);
+    public Animation createForceHideEnterAnimation(boolean onWallpaper) {
+        return AnimationUtils.loadAnimation(mContext, onWallpaper
+                ? com.android.internal.R.anim.lock_screen_wallpaper_behind_enter
+                : com.android.internal.R.anim.lock_screen_behind_enter);
     }
 
     static ITelephony getTelephonyService() {

services/java/com/android/server/wm/WindowAnimator.java

@@ -22,6 +22,7 @@
 import com.android.internal.policy.impl.PhoneWindowManager;
 
 import java.io.PrintWriter;
+import java.util.ArrayList;
 import java.util.HashSet;
 
 /**
@@ -172,6 +173,9 @@ private void updateWindowsAppsAndRotationAnimationsLocked() {
     private void updateWindowsAndWallpaperLocked() {
         ++mTransactionSequence;
 
+        ArrayList<WindowStateAnimator> unForceHiding = null;
+        boolean wallpaperInUnForceHiding = false;
+
         for (int i = mService.mWindows.size() - 1; i >= 0; i--) {
             WindowState win = mService.mWindows.get(i);
             WindowStateAnimator winAnimator = win.mWinAnimator;
@@ -267,13 +271,12 @@ private void updateWindowsAndWallpaperLocked() {
                         if (changed) {
                             if ((mBulkUpdateParams & SET_FORCE_HIDING_CHANGED) != 0
                                     && win.isVisibleNow() /*w.isReadyForDisplay()*/) {
-                                // Assume we will need to animate.  If
-                                // we don't (because the wallpaper will
-                                // stay with the lock screen), then we will
-                                // clean up later.
-                                Animation a = mPolicy.createForceHideEnterAnimation();
-                                if (a != null) {
-                                    winAnimator.setAnimation(a);
+                                if (unForceHiding == null) {
+                                    unForceHiding = new ArrayList<WindowStateAnimator>();
+                                }
+                                unForceHiding.add(winAnimator);
+                                if ((win.mAttrs.flags&WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER) != 0) {
+                                    wallpaperInUnForceHiding = true;
                                 }
                             }
                             if (mCurrentFocus == null || mCurrentFocus.mLayer < win.mLayer) {
@@ -356,6 +359,17 @@ private void updateWindowsAndWallpaperLocked() {
                 }
             }
         } // end forall windows
+
+        // If we have windows that are being show due to them no longer
+        // being force-hidden, apply the appropriate animation to them.
+        if (unForceHiding != null) {
+            for (int i=unForceHiding.size()-1; i>=0; i--) {
+                Animation a = mPolicy.createForceHideEnterAnimation(wallpaperInUnForceHiding);
+                if (a != null) {
+                    unForceHiding.get(i).setAnimation(a);
+                }
+            }
+        }
     }
 
     private void testTokenMayBeDrawnLocked() {

services/java/com/android/server/wm/WindowManagerService.java

@@ -7894,28 +7894,6 @@ private int animateAwayWallpaperLocked() {
         if (DEBUG_WALLPAPER) Slog.v(TAG, "****** OLD: " + oldWallpaper
                 + " NEW: " + mWallpaperTarget
                 + " LOWER: " + mLowerWallpaperTarget);
-        if (mLowerWallpaperTarget == null) {
-            // Whoops, we don't need a special wallpaper animation.
-            // Clear them out.
-            mAnimator.mForceHiding = false;
-            for (int i=mWindows.size()-1; i>=0; i--) {
-                WindowState w = mWindows.get(i);
-                if (w.mHasSurface) {
-                    final WindowManager.LayoutParams attrs = w.mAttrs;
-                    if (mPolicy.doesForceHide(w, attrs) && w.isVisibleLw()) {
-                        if (DEBUG_FOCUS) Slog.i(TAG, "win=" + w + " force hides other windows");
-                        mAnimator.mForceHiding = true;
-                    } else if (mPolicy.canBeForceHidden(w, attrs)) {
-                        if (!w.mWinAnimator.mAnimating) {
-                            // We set the animation above so it
-                            // is not yet running.
-                            // TODO(cmautner): We lose the enter animation when this occurs.
-                            w.mWinAnimator.clearAnimation();
-                        }
-                    }
-                }
-            }
-        }
         return changes;
     }