am 9afb2e1a: Optimize focused input event dispatch in view root. DO NOT MERGE

* commit '9afb2e1a95b92d5dfb0612bbb606a09aa528ee5d':
  Optimize focused input event dispatch in view root. DO NOT MERGE

2 files changed, 146 insertions, 146 deletions

diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index fe2cf0e..9ef9d01 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -232,6 +232,13 @@ public final class ViewRootImpl implements ViewParent,
     int mLastSystemUiVisibility;
     int mClientWindowLayoutFlags;
 
+    /** @hide */
+    public static final int EVENT_NOT_HANDLED = 0;
+    /** @hide */
+    public static final int EVENT_HANDLED = 1;
+    /** @hide */
+    public static final int EVENT_IN_PROGRESS = 2;
+
     // Pool of queued input events.
     private static final int MAX_QUEUED_INPUT_EVENT_POOL_SIZE = 10;
     private QueuedInputEvent mQueuedInputEventPool;
@@ -3157,19 +3164,37 @@ public final class ViewRootImpl implements ViewParent,
         return false;
     }
 
-    private void deliverInputEvent(QueuedInputEvent q) {
+    private int deliverInputEvent(QueuedInputEvent q) {
         Trace.traceBegin(Trace.TRACE_TAG_VIEW, "deliverInputEvent");
         try {
             if (q.mEvent instanceof KeyEvent) {
-                deliverKeyEvent(q);
+                return deliverKeyEvent(q);
             } else {
                 final int source = q.mEvent.getSource();
                 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) {
-                    deliverPointerEvent(q);
+                    return deliverPointerEvent(q);
                 } else if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {
-                    deliverTrackballEvent(q);
+                    return deliverTrackballEvent(q);
+                } else {
+                    return deliverGenericMotionEvent(q);
+                }
+            }
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_VIEW);
+        }
+    }
+
+    private int deliverInputEventPostIme(QueuedInputEvent q) {
+        Trace.traceBegin(Trace.TRACE_TAG_VIEW, "deliverInputEventPostIme");
+        try {
+            if (q.mEvent instanceof KeyEvent) {
+                return deliverKeyEventPostIme(q);
+            } else {
+                final int source = q.mEvent.getSource();
+                if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {
+                    return deliverTrackballEventPostIme(q);
                 } else {
-                    deliverGenericMotionEvent(q);
+                    return deliverGenericMotionEventPostIme(q);
                 }
             }
         } finally {
@@ -3177,7 +3202,7 @@ public final class ViewRootImpl implements ViewParent,
         }
     }
 
-    private void deliverPointerEvent(QueuedInputEvent q) {
+    private int deliverPointerEvent(QueuedInputEvent q) {
         final MotionEvent event = (MotionEvent)q.mEvent;
         final boolean isTouchEvent = event.isTouchEvent();
         if (mInputEventConsistencyVerifier != null) {
@@ -3190,8 +3215,7 @@ public final class ViewRootImpl implements ViewParent,
 
         // If there is no view, then the event will not be handled.
         if (mView == null || !mAdded) {
-            finishInputEvent(q, false);
-            return;
+            return EVENT_NOT_HANDLED;
         }
 
         // Translate the pointer event for compatibility, if needed.
@@ -3224,16 +3248,10 @@ public final class ViewRootImpl implements ViewParent,
         if (MEASURE_LATENCY) {
             lt.sample("B Dispatched PointerEvents ", System.nanoTime() - event.getEventTimeNano());
         }
-        if (handled) {
-            finishInputEvent(q, true);
-            return;
-        }
-
-        // Pointer event was unhandled.
-        finishInputEvent(q, false);
+        return handled ? EVENT_HANDLED : EVENT_NOT_HANDLED;
     }
 
-    private void deliverTrackballEvent(QueuedInputEvent q) {
+    private int deliverTrackballEvent(QueuedInputEvent q) {
         final MotionEvent event = (MotionEvent)q.mEvent;
         if (mInputEventConsistencyVerifier != null) {
             mInputEventConsistencyVerifier.onTrackballEvent(event, 0);
@@ -3252,24 +3270,25 @@ public final class ViewRootImpl implements ViewParent,
                     if (DEBUG_IMF)
                         Log.v(TAG, "Sending trackball event to IME: seq="
                                 + seq + " event=" + event);
-                    imm.dispatchTrackballEvent(mView.getContext(), seq, event,
+                    int result = imm.dispatchTrackballEvent(mView.getContext(), seq, event,
                             mInputMethodCallback);
-                    return;
+                    if (result != EVENT_NOT_HANDLED) {
+                        return result;
+                    }
                 }
             }
         }
 
         // Not dispatching to IME, continue with post IME actions.
-        deliverTrackballEventPostIme(q);
+        return deliverTrackballEventPostIme(q);
     }
 
-    private void deliverTrackballEventPostIme(QueuedInputEvent q) {
+    private int deliverTrackballEventPostIme(QueuedInputEvent q) {
         final MotionEvent event = (MotionEvent) q.mEvent;
 
         // If there is no view, then the event will not be handled.
         if (mView == null || !mAdded) {
-            finishInputEvent(q, false);
-            return;
+            return EVENT_NOT_HANDLED;
         }
 
         // Deliver the trackball event to the view.
@@ -3279,10 +3298,8 @@ public final class ViewRootImpl implements ViewParent,
             // event into a key event, touch mode will not exit, so we exit
             // touch mode here.
             ensureTouchMode(false);
-
-            finishInputEvent(q, true);
             mLastTrackballTime = Integer.MIN_VALUE;
-            return;
+            return EVENT_HANDLED;
         }
 
         // Translate the trackball event into DPAD keys and try to deliver those.
@@ -3390,10 +3407,10 @@ public final class ViewRootImpl implements ViewParent,
 
         // Unfortunately we can't tell whether the application consumed the keys, so
         // we always consider the trackball event handled.
-        finishInputEvent(q, true);
+        return EVENT_HANDLED;
     }
 
-    private void deliverGenericMotionEvent(QueuedInputEvent q) {
+    private int deliverGenericMotionEvent(QueuedInputEvent q) {
         final MotionEvent event = (MotionEvent)q.mEvent;
         if (mInputEventConsistencyVerifier != null) {
             mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0);
@@ -3411,18 +3428,20 @@ public final class ViewRootImpl implements ViewParent,
                     if (DEBUG_IMF)
                         Log.v(TAG, "Sending generic motion event to IME: seq="
                                 + seq + " event=" + event);
-                    imm.dispatchGenericMotionEvent(mView.getContext(), seq, event,
+                    int result = imm.dispatchGenericMotionEvent(mView.getContext(), seq, event,
                             mInputMethodCallback);
-                    return;
+                    if (result != EVENT_NOT_HANDLED) {
+                        return result;
+                    }
                 }
             }
         }
 
         // Not dispatching to IME, continue with post IME actions.
-        deliverGenericMotionEventPostIme(q);
+        return deliverGenericMotionEventPostIme(q);
     }
 
-    private void deliverGenericMotionEventPostIme(QueuedInputEvent q) {
+    private int deliverGenericMotionEventPostIme(QueuedInputEvent q) {
         final MotionEvent event = (MotionEvent) q.mEvent;
         final int source = event.getSource();
         final boolean isJoystick = (source & InputDevice.SOURCE_CLASS_JOYSTICK) != 0;
@@ -3436,8 +3455,7 @@ public final class ViewRootImpl implements ViewParent,
               //Convert TouchPad motion into a TrackBall event
               mSimulatedTrackball.updateTrackballDirection(this, event);
             }
-            finishInputEvent(q, false);
-            return;
+            return EVENT_NOT_HANDLED;
         }
 
         // Deliver the event to the view.
@@ -3448,22 +3466,21 @@ public final class ViewRootImpl implements ViewParent,
               //Convert TouchPad motion into a TrackBall event
               mSimulatedTrackball.updateTrackballDirection(this, event);
             }
-            finishInputEvent(q, true);
-            return;
+            return EVENT_HANDLED;
         }
 
         if (isJoystick) {
             // Translate the joystick event into DPAD keys and try to deliver
             // those.
             updateJoystickDirection(event, true);
-            finishInputEvent(q, true);
-        } else if (isTouchPad) {
+            return EVENT_HANDLED;
+        }
+        if (isTouchPad) {
             //Convert TouchPad motion into a TrackBall event
             mSimulatedTrackball.updateTrackballDirection(this, event);
-            finishInputEvent(q, true);
-        } else {
-            finishInputEvent(q, false);
+            return EVENT_HANDLED;
         }
+        return EVENT_NOT_HANDLED;
     }
 
     private void updateJoystickDirection(MotionEvent event, boolean synthesizeNewKeys) {
@@ -3607,7 +3624,7 @@ public final class ViewRootImpl implements ViewParent,
         return false;
     }
 
-    private void deliverKeyEvent(QueuedInputEvent q) {
+    private int deliverKeyEvent(QueuedInputEvent q) {
         final KeyEvent event = (KeyEvent)q.mEvent;
         if (mInputEventConsistencyVerifier != null) {
             mInputEventConsistencyVerifier.onKeyEvent(event, 0);
@@ -3618,8 +3635,7 @@ public final class ViewRootImpl implements ViewParent,
 
             // Perform predispatching before the IME.
             if (mView.dispatchKeyEventPreIme(event)) {
-                finishInputEvent(q, true);
-                return;
+                return EVENT_HANDLED;
             }
 
             // Dispatch to the IME before propagating down the view hierarchy.
@@ -3630,81 +3646,30 @@ public final class ViewRootImpl implements ViewParent,
                     final int seq = event.getSequenceNumber();
                     if (DEBUG_IMF) Log.v(TAG, "Sending key event to IME: seq="
                             + seq + " event=" + event);
-                    imm.dispatchKeyEvent(mView.getContext(), seq, event, mInputMethodCallback);
-                    return;
+                    int result = imm.dispatchKeyEvent(mView.getContext(), seq, event,
+                            mInputMethodCallback);
+                    if (result != EVENT_NOT_HANDLED) {
+                        return result;
+                    }
                 }
             }
         }
 
         // Not dispatching to IME, continue with post IME actions.
-        deliverKeyEventPostIme(q);
-    }
-
-    void handleImeFinishedEvent(int seq, boolean handled) {
-        final QueuedInputEvent q = mCurrentInputEvent;
-        if (q != null && q.mEvent.getSequenceNumber() == seq) {
-            if (DEBUG_IMF) {
-                Log.v(TAG, "IME finished event: seq=" + seq
-                        + " handled=" + handled + " event=" + q);
-            }
-            if (handled) {
-                finishInputEvent(q, true);
-            } else {
-                if (q.mEvent instanceof KeyEvent) {
-                    KeyEvent event = (KeyEvent)q.mEvent;
-                    if (event.getAction() != KeyEvent.ACTION_UP) {
-                        // If the window doesn't currently have input focus, then drop
-                        // this event.  This could be an event that came back from the
-                        // IME dispatch but the window has lost focus in the meantime.
-                        if (!mAttachInfo.mHasWindowFocus) {
-                            Slog.w(TAG, "Dropping event due to no window focus: " + event);
-                            finishInputEvent(q, true);
-                            return;
-                        }
-                    }
-                    deliverKeyEventPostIme(q);
-                } else {
-                    MotionEvent event = (MotionEvent)q.mEvent;
-                    if (event.getAction() != MotionEvent.ACTION_CANCEL
-                            && event.getAction() != MotionEvent.ACTION_UP) {
-                        // If the window doesn't currently have input focus, then drop
-                        // this event.  This could be an event that came back from the
-                        // IME dispatch but the window has lost focus in the meantime.
-                        if (!mAttachInfo.mHasWindowFocus) {
-                            Slog.w(TAG, "Dropping event due to no window focus: " + event);
-                            finishInputEvent(q, true);
-                            return;
-                        }
-                    }
-                    final int source = q.mEvent.getSource();
-                    if ((source & InputDevice.SOURCE_CLASS_TRACKBALL) != 0) {
-                        deliverTrackballEventPostIme(q);
-                    } else {
-                        deliverGenericMotionEventPostIme(q);
-                    }
-                }
-            }
-        } else {
-            if (DEBUG_IMF) {
-                Log.v(TAG, "IME finished event: seq=" + seq
-                        + " handled=" + handled + ", event not found!");
-            }
-        }
+        return deliverKeyEventPostIme(q);
     }
 
-    private void deliverKeyEventPostIme(QueuedInputEvent q) {
+    private int deliverKeyEventPostIme(QueuedInputEvent q) {
         final KeyEvent event = (KeyEvent)q.mEvent;
 
         // If the view went away, then the event will not be handled.
         if (mView == null || !mAdded) {
-            finishInputEvent(q, false);
-            return;
+            return EVENT_NOT_HANDLED;
         }
 
         // If the key's purpose is to exit touch mode then we consume it and consider it handled.
         if (checkForLeavingTouchModeAndConsume(event)) {
-            finishInputEvent(q, true);
-            return;
+            return EVENT_HANDLED;
         }
 
         // Make sure the fallback event policy sees all keys that will be delivered to the
@@ -3713,8 +3678,7 @@ public final class ViewRootImpl implements ViewParent,
 
         // Deliver the key to the view hierarchy.
         if (mView.dispatchKeyEvent(event)) {
-            finishInputEvent(q, true);
-            return;
+            return EVENT_HANDLED;
         }
 
         // If the Control modifier is held, try to interpret the key as a shortcut.
@@ -3723,15 +3687,13 @@ public final class ViewRootImpl implements ViewParent,
                 && event.getRepeatCount() == 0
                 && !KeyEvent.isModifierKey(event.getKeyCode())) {
             if (mView.dispatchKeyShortcutEvent(event)) {
-                finishInputEvent(q, true);
-                return;
+                return EVENT_HANDLED;
             }
         }
 
         // Apply the fallback event policy.
         if (mFallbackEventHandler.dispatchKeyEvent(event)) {
-            finishInputEvent(q, true);
-            return;
+            return EVENT_HANDLED;
         }
 
         // Handle automatic focus changes.
@@ -3784,22 +3746,20 @@ public final class ViewRootImpl implements ViewParent,
                         if (v.requestFocus(direction, mTempRect)) {
                             playSoundEffect(SoundEffectConstants
                                     .getContantForFocusDirection(direction));
-                            finishInputEvent(q, true);
-                            return;
+                            return EVENT_HANDLED;
                         }
                     }
 
                     // Give the focused view a last chance to handle the dpad key.
                     if (mView.dispatchUnhandledMove(focused, direction)) {
-                        finishInputEvent(q, true);
-                        return;
+                        return EVENT_HANDLED;
                     }
                 }
             }
         }
 
         // Key was unhandled.
-        finishInputEvent(q, false);
+        return EVENT_NOT_HANDLED;
     }
 
     /* drag/drop */
@@ -4303,7 +4263,11 @@ public final class ViewRootImpl implements ViewParent,
             mFirstPendingInputEvent = q.mNext;
             q.mNext = null;
             mCurrentInputEvent = q;
-            deliverInputEvent(q);
+
+            final int result = deliverInputEvent(q);
+            if (result != EVENT_IN_PROGRESS) {
+                finishCurrentInputEvent(result == EVENT_HANDLED);
+            }
         }
 
         // We are done processing all input events that we can process right now
@@ -4314,10 +4278,42 @@ public final class ViewRootImpl implements ViewParent,
         }
     }
 
-    private void finishInputEvent(QueuedInputEvent q, boolean handled) {
-        if (q != mCurrentInputEvent) {
-            throw new IllegalStateException("finished input event out of order");
+    void handleImeFinishedEvent(int seq, boolean handled) {
+        final QueuedInputEvent q = mCurrentInputEvent;
+        if (q != null && q.mEvent.getSequenceNumber() == seq) {
+            if (DEBUG_IMF) {
+                Log.v(TAG, "IME finished event: seq=" + seq
+                        + " handled=" + handled + " event=" + q);
+            }
+
+            if (!handled) {
+                // If the window doesn't currently have input focus, then drop
+                // this event.  This could be an event that came back from the
+                // IME dispatch but the window has lost focus in the meantime.
+                if (!mAttachInfo.mHasWindowFocus && !isTerminalInputEvent(q.mEvent)) {
+                    Slog.w(TAG, "Dropping event due to no window focus: " + q.mEvent);
+                } else {
+                    final int result = deliverInputEventPostIme(q);
+                    if (result == EVENT_HANDLED) {
+                        handled = true;
+                    }
+                }
+            }
+            finishCurrentInputEvent(handled);
+
+            // Immediately start processing the next input event.
+            doProcessInputEvents();
+        } else {
+            if (DEBUG_IMF) {
+                Log.v(TAG, "IME finished event: seq=" + seq
+                        + " handled=" + handled + ", event not found!");
+            }
         }
+    }
+
+    private void finishCurrentInputEvent(boolean handled) {
+        final QueuedInputEvent q = mCurrentInputEvent;
+        mCurrentInputEvent = null;
 
         if (q.mReceiver != null) {
             q.mReceiver.finishInputEvent(q.mEvent, handled);
@@ -4326,10 +4322,18 @@ public final class ViewRootImpl implements ViewParent,
         }
 
         recycleQueuedInputEvent(q);
+    }
 
-        mCurrentInputEvent = null;
-        if (mFirstPendingInputEvent != null) {
-            scheduleProcessInputEvents();
+    private static boolean isTerminalInputEvent(InputEvent event) {
+        if (event instanceof KeyEvent) {
+            final KeyEvent keyEvent = (KeyEvent)event;
+            return keyEvent.getAction() == KeyEvent.ACTION_UP;
+        } else {
+            final MotionEvent motionEvent = (MotionEvent)event;
+            final int action = motionEvent.getAction();
+            return action == MotionEvent.ACTION_UP
+                    || action == MotionEvent.ACTION_CANCEL
+                    || action == MotionEvent.ACTION_HOVER_EXIT;
         }
     }
 
diff --git a/core/java/android/view/inputmethod/InputMethodManager.java b/core/java/android/view/inputmethod/InputMethodManager.java
index 4a3f846..d258f4d 100644
--- a/core/java/android/view/inputmethod/InputMethodManager.java
+++ b/core/java/android/view/inputmethod/InputMethodManager.java
@@ -334,7 +334,7 @@ public final class InputMethodManager {
     
     class H extends Handler {
         H(Looper looper) {
-            super(looper);
+            super(looper, null, true);
         }
         
         @Override
@@ -1565,38 +1565,36 @@ public final class InputMethodManager {
     /**
      * @hide
      */
-    public void dispatchKeyEvent(Context context, int seq, KeyEvent key,
+    public int dispatchKeyEvent(Context context, int seq, KeyEvent key,
             FinishedEventCallback callback) {
-        boolean handled = false;
         synchronized (mH) {
             if (DEBUG) Log.d(TAG, "dispatchKeyEvent");
 
             if (mCurMethod != null) {
                 if (key.getAction() == KeyEvent.ACTION_DOWN
-                        && key.getKeyCode() == KeyEvent.KEYCODE_SYM) {
+                        && key.getKeyCode() == KeyEvent.KEYCODE_SYM
+                        && key.getRepeatCount() == 0) {
                     showInputMethodPickerLocked();
-                    handled = true;
-                } else {
-                    try {
-                        if (DEBUG) Log.v(TAG, "DISPATCH KEY: " + mCurMethod);
-                        final long startTime = SystemClock.uptimeMillis();
-                        enqueuePendingEventLocked(startTime, seq, mCurId, callback);
-                        mCurMethod.dispatchKeyEvent(seq, key, mInputMethodCallback);
-                        return;
-                    } catch (RemoteException e) {
-                        Log.w(TAG, "IME died: " + mCurId + " dropping: " + key, e);
-                    }
+                    return ViewRootImpl.EVENT_HANDLED;
+                }
+                try {
+                    if (DEBUG) Log.v(TAG, "DISPATCH KEY: " + mCurMethod);
+                    final long startTime = SystemClock.uptimeMillis();
+                    enqueuePendingEventLocked(startTime, seq, mCurId, callback);
+                    mCurMethod.dispatchKeyEvent(seq, key, mInputMethodCallback);
+                    return ViewRootImpl.EVENT_IN_PROGRESS;
+                } catch (RemoteException e) {
+                    Log.w(TAG, "IME died: " + mCurId + " dropping: " + key, e);
                 }
             }
         }
-
-        callback.finishedEvent(seq, handled);
+        return ViewRootImpl.EVENT_NOT_HANDLED;
     }
 
     /**
      * @hide
      */
-    public void dispatchTrackballEvent(Context context, int seq, MotionEvent motion,
+    public int dispatchTrackballEvent(Context context, int seq, MotionEvent motion,
             FinishedEventCallback callback) {
         synchronized (mH) {
             if (DEBUG) Log.d(TAG, "dispatchTrackballEvent");
@@ -1607,20 +1605,19 @@ public final class InputMethodManager {
                     final long startTime = SystemClock.uptimeMillis();
                     enqueuePendingEventLocked(startTime, seq, mCurId, callback);
                     mCurMethod.dispatchTrackballEvent(seq, motion, mInputMethodCallback);
-                    return;
+                    return ViewRootImpl.EVENT_IN_PROGRESS;
                 } catch (RemoteException e) {
                     Log.w(TAG, "IME died: " + mCurId + " dropping trackball: " + motion, e);
                 }
             }
         }
-
-        callback.finishedEvent(seq, false);
+        return ViewRootImpl.EVENT_NOT_HANDLED;
     }
 
     /**
      * @hide
      */
-    public void dispatchGenericMotionEvent(Context context, int seq, MotionEvent motion,
+    public int dispatchGenericMotionEvent(Context context, int seq, MotionEvent motion,
             FinishedEventCallback callback) {
         synchronized (mH) {
             if (DEBUG) Log.d(TAG, "dispatchGenericMotionEvent");
@@ -1631,14 +1628,13 @@ public final class InputMethodManager {
                     final long startTime = SystemClock.uptimeMillis();
                     enqueuePendingEventLocked(startTime, seq, mCurId, callback);
                     mCurMethod.dispatchGenericMotionEvent(seq, motion, mInputMethodCallback);
-                    return;
+                    return ViewRootImpl.EVENT_IN_PROGRESS;
                 } catch (RemoteException e) {
                     Log.w(TAG, "IME died: " + mCurId + " dropping generic motion: " + motion, e);
                 }
             }
         }
-
-        callback.finishedEvent(seq, false);
+        return ViewRootImpl.EVENT_NOT_HANDLED;
     }
 
     void finishedEvent(int seq, boolean handled) {