am 9d42c7f7: Merge "Fix 2797185: Re-enable thumbnail generation in framework" into gingerbread

Merge commit '9d42c7f75cfd7544d6e3f253cedf9ac983fdc6b2' into gingerbread-plus-aosp

* commit '9d42c7f75cfd7544d6e3f253cedf9ac983fdc6b2':
  Fix 2797185: Re-enable thumbnail generation in framework

4 files changed, 92 insertions, 20 deletions

diff --git a/core/java/android/app/Activity.java b/core/java/android/app/Activity.java
index 985f591..f7ccc12 100644
--- a/core/java/android/app/Activity.java
+++ b/core/java/android/app/Activity.java
@@ -67,6 +67,8 @@ import android.view.View.OnCreateContextMenuListener;
 import android.view.ViewGroup.LayoutParams;
 import android.view.accessibility.AccessibilityEvent;
 import android.widget.AdapterView;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -1204,19 +1206,37 @@ public class Activity extends ContextThemeWrapper
      * @see #onPause
      */
     public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) {
-        final View view = mDecor;
-        if (view == null) {
+        if (mDecor == null) {
             return false;
         }
 
-        final int vw = view.getWidth();
-        final int vh = view.getHeight();
-        final int dw = outBitmap.getWidth();
-        final int dh = outBitmap.getHeight();
+        int paddingLeft = 0;
+        int paddingRight = 0;
+        int paddingTop = 0;
+        int paddingBottom = 0;
+
+        // Find System window and use padding so we ignore space reserved for decorations
+        // like the status bar and such.
+        final FrameLayout top = (FrameLayout) mDecor;
+        for (int i = 0; i < top.getChildCount(); i++) {
+            View child = top.getChildAt(i);
+            if (child.isFitsSystemWindowsFlagSet()) {
+                paddingLeft = child.getPaddingLeft();
+                paddingRight = child.getPaddingRight();
+                paddingTop = child.getPaddingTop();
+                paddingBottom = child.getPaddingBottom();
+                break;
+            }
+        }
+        
+        final int visibleWidth = mDecor.getWidth() - paddingLeft - paddingRight;
+        final int visibleHeight = mDecor.getHeight() - paddingTop - paddingBottom;
 
         canvas.save();
-        canvas.scale(((float)dw)/vw, ((float)dh)/vh);
-        view.draw(canvas);
+        canvas.scale( (float) outBitmap.getWidth() / visibleWidth,
+                (float) outBitmap.getHeight() / visibleHeight);
+        canvas.translate(-paddingLeft, -paddingTop);
+        mDecor.draw(canvas);
         canvas.restore();
 
         return true;
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index eb7520f..d66e98b 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -285,24 +285,54 @@ public class ActivityManager {
      * @param maxNum The maximum number of entries to return in the list.  The
      * actual number returned may be smaller, depending on how many tasks the
      * user has started.
-     * 
+     *
+     * @param flags Optional flags
+     * @param receiver Optional receiver for delayed thumbnails
+     *
      * @return Returns a list of RunningTaskInfo records describing each of
      * the running tasks.
      * 
+     * Some thumbnails may not be available at the time of this call. The optional
+     * receiver may be used to receive those thumbnails.
+     *
      * @throws SecurityException Throws SecurityException if the caller does
      * not hold the {@link android.Manifest.permission#GET_TASKS} permission.
+     *
+     * @hide
      */
-    public List<RunningTaskInfo> getRunningTasks(int maxNum)
+    public List<RunningTaskInfo> getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver)
             throws SecurityException {
         try {
-            return (List<RunningTaskInfo>)ActivityManagerNative.getDefault()
-                    .getTasks(maxNum, 0, null);
+            return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver);
         } catch (RemoteException e) {
             // System dead, we will be dead too soon!
             return null;
         }
     }
-    
+
+    /**
+     * Return a list of the tasks that are currently running, with
+     * the most recent being first and older ones after in order.  Note that
+     * "running" does not mean any of the task's code is currently loaded or
+     * activity -- the task may have been frozen by the system, so that it
+     * can be restarted in its previous state when next brought to the
+     * foreground.
+     *
+     * @param maxNum The maximum number of entries to return in the list.  The
+     * actual number returned may be smaller, depending on how many tasks the
+     * user has started.
+     *
+     * @return Returns a list of RunningTaskInfo records describing each of
+     * the running tasks.
+     *
+     * @throws SecurityException Throws SecurityException if the caller does
+     * not hold the {@link android.Manifest.permission#GET_TASKS} permission.
+     */
+    public List<RunningTaskInfo> getRunningTasks(int maxNum)
+            throws SecurityException {
+        return getRunningTasks(maxNum, 0, null);
+    }
+
     /**
      * Information you can retrieve about a particular Service that is
      * currently running in the system.
diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 883366b..0fb2b49 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -115,6 +115,7 @@ final class RemoteServiceException extends AndroidRuntimeException {
  */
 public final class ActivityThread {
     static final String TAG = "ActivityThread";
+    private static final android.graphics.Bitmap.Config THUMBNAIL_FORMAT = Bitmap.Config.RGB_565;
     private static final boolean DEBUG = false;
     static final boolean localLOGV = DEBUG ? Config.LOGD : Config.LOGV;
     static final boolean DEBUG_BROADCAST = false;
@@ -2210,13 +2211,24 @@ public final class ActivityThread {
                 h = mThumbnailHeight;
             }
 
-            // XXX Only set hasAlpha if needed?
-            thumbnail = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);
-            thumbnail.eraseColor(0);
-            Canvas cv = new Canvas(thumbnail);
-            if (!r.activity.onCreateThumbnail(thumbnail, cv)) {
-                thumbnail = null;
+            // On platforms where we don't want thumbnails, set dims to (0,0)
+            if ((w > 0) && (h > 0)) {
+                View topView = r.activity.getWindow().getDecorView();
+
+                // Maximize bitmap by capturing in native aspect.
+                if (topView.getWidth() >= topView.getHeight()) {
+                    thumbnail = Bitmap.createBitmap(w, h, THUMBNAIL_FORMAT);
+                } else {
+                    thumbnail = Bitmap.createBitmap(h, w, THUMBNAIL_FORMAT);
+                }
+
+                thumbnail.eraseColor(0);
+                Canvas cv = new Canvas(thumbnail);
+                if (!r.activity.onCreateThumbnail(thumbnail, cv)) {
+                    thumbnail = null;
+                }
             }
+
         } catch (Exception e) {
             if (!mInstrumentation.onException(r.activity, e)) {
                 throw new RuntimeException(
@@ -2347,7 +2359,7 @@ public final class ActivityThread {
             if (info != null) {
                 try {
                     // First create a thumbnail for the activity...
-                    //info.thumbnail = createThumbnailBitmap(r);
+                    info.thumbnail = createThumbnailBitmap(r);
                     info.description = r.activity.onCreateDescription();
                 } catch (Exception e) {
                     if (!mInstrumentation.onException(r.activity, e)) {
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 11e5ad1..329b2e7 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -3005,6 +3005,16 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
     }
 
     /**
+     * Determine if this view has the FITS_SYSTEM_WINDOWS flag set.
+     * @return True if window has FITS_SYSTEM_WINDOWS set
+     *
+     * @hide
+     */
+    public boolean isFitsSystemWindowsFlagSet() {
+        return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS;
+    }
+
+    /**
      * Returns the visibility status for this view.
      *
      * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}.