From ab16237e69061bb0aa7f882e48e5d93459c22ef3 Mon Sep 17 00:00:00 2001
From: "Tadashi G. Takaoka" <takaoka@google.com>
Date: Tue, 13 Aug 2013 12:10:26 +0900
Subject: [PATCH] Thin out audio and haptic feedback while key repeat

Bug: 6522943
Change-Id: Id60f256ab0f8741578eda276116817fa48917325
---
 .../keyboard/KeyboardActionListener.java      |  6 ++--
 .../keyboard/MainKeyboardView.java            | 10 +++---
 .../inputmethod/keyboard/PointerTracker.java  | 26 +++++++-------
 .../latin/AudioAndHapticFeedbackManager.java  | 12 +++----
 .../android/inputmethod/latin/LatinIME.java   | 35 +++++++++++++------
 .../suggestions/SuggestionStripView.java      |  2 +-
 6 files changed, 55 insertions(+), 36 deletions(-)

diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardActionListener.java b/java/src/com/android/inputmethod/keyboard/KeyboardActionListener.java
index b266986654..dc760e685a 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardActionListener.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardActionListener.java
@@ -26,10 +26,10 @@ public interface KeyboardActionListener {
      *
      * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid key,
      *            the value will be zero.
-     * @param isRepeatKey true if pressing has occurred while key repeat input.
+     * @param repeatCount how many times the key was repeated. Zero if it is the first press.
      * @param isSinglePointer true if pressing has occurred while no other key is being pressed.
      */
-    public void onPressKey(int primaryCode, boolean isRepeatKey, boolean isSinglePointer);
+    public void onPressKey(int primaryCode, int repeatCount, boolean isSinglePointer);
 
     /**
      * Called when the user releases a key. This is sent after the {@link #onCodeInput} is called.
@@ -103,7 +103,7 @@ public interface KeyboardActionListener {
 
     public static class Adapter implements KeyboardActionListener {
         @Override
-        public void onPressKey(int primaryCode, boolean isRepeatKey, boolean isSinglePointer) {}
+        public void onPressKey(int primaryCode, int repeatCount, boolean isSinglePointer) {}
         @Override
         public void onReleaseKey(int primaryCode, boolean withSliding) {}
         @Override
diff --git a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
index 526c2f1ec4..f3d0eadc80 100644
--- a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
@@ -217,7 +217,7 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
                 startWhileTypingFadeinAnimation(keyboardView);
                 break;
             case MSG_REPEAT_KEY:
-                tracker.onKeyRepeat(msg.arg1);
+                tracker.onKeyRepeat(msg.arg1 /* code */, msg.arg2 /* repeatCount */);
                 break;
             case MSG_LONGPRESS_KEY:
                 keyboardView.onLongPress(tracker);
@@ -230,12 +230,14 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         }
 
         @Override
-        public void startKeyRepeatTimer(final PointerTracker tracker, final int delay) {
+        public void startKeyRepeatTimer(final PointerTracker tracker, final int repeatCount,
+                final int delay) {
             final Key key = tracker.getKey();
             if (key == null || delay == 0) {
                 return;
             }
-            sendMessageDelayed(obtainMessage(MSG_REPEAT_KEY, key.mCode, 0, tracker), delay);
+            sendMessageDelayed(
+                    obtainMessage(MSG_REPEAT_KEY, key.mCode, repeatCount, tracker), delay);
         }
 
         public void cancelKeyRepeatTimer() {
@@ -938,7 +940,7 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
         if (key.hasNoPanelAutoMoreKey()) {
             final int moreKeyCode = key.mMoreKeys[0].mCode;
             tracker.onLongPressed();
-            listener.onPressKey(moreKeyCode, false /* isRepeatKey */, true /* isSinglePointer */);
+            listener.onPressKey(moreKeyCode, 0 /* repeatCount */, true /* isSinglePointer */);
             listener.onCodeInput(moreKeyCode,
                     Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE);
             listener.onReleaseKey(moreKeyCode, false /* withSliding */);
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index b66ee2a655..5387ddb6d2 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -64,7 +64,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
 
         /**
          * Get KeyboardActionListener object that is used to register key code and so on.
-         * @return the KeyboardActionListner for this PointerTracker
+         * @return the KeyboardActionListner for this PointerTracke
          */
         public KeyboardActionListener getKeyboardActionListener();
 
@@ -94,7 +94,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
     public interface TimerProxy {
         public void startTypingStateTimer(Key typedKey);
         public boolean isTypingState();
-        public void startKeyRepeatTimer(PointerTracker tracker, int delay);
+        public void startKeyRepeatTimer(PointerTracker tracker, int repeatCount, int delay);
         public void startLongPressTimer(PointerTracker tracker, int delay);
         public void cancelLongPressTimer();
         public void startDoubleTapShiftKeyTimer();
@@ -111,7 +111,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
             @Override
             public boolean isTypingState() { return false; }
             @Override
-            public void startKeyRepeatTimer(PointerTracker tracker, int delay) {}
+            public void startKeyRepeatTimer(PointerTracker tracker, int repeatCount, int delay) {}
             @Override
             public void startLongPressTimer(PointerTracker tracker, int delay) {}
             @Override
@@ -490,7 +490,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
 
     // Returns true if keyboard has been changed by this callback.
     private boolean callListenerOnPressAndCheckKeyboardLayoutChange(final Key key,
-            final boolean isRepeatKey) {
+            final int repeatCount) {
         // While gesture input is going on, this method should be a no-operation. But when gesture
         // input has been canceled, <code>sInGesture</code> and <code>mIsDetectingGesture</code>
         // are set to false. To keep this method is a no-operation,
@@ -504,13 +504,13 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
                     KeyDetector.printableCode(key),
                     ignoreModifierKey ? " ignoreModifier" : "",
                     key.isEnabled() ? "" : " disabled",
-                    isRepeatKey ? " repeat" : ""));
+                    repeatCount > 0 ? " repeatCount=" + repeatCount : ""));
         }
         if (ignoreModifierKey) {
             return false;
         }
         if (key.isEnabled()) {
-            mListener.onPressKey(key.mCode, isRepeatKey, getActivePointerTrackerCount() == 1);
+            mListener.onPressKey(key.mCode, repeatCount, getActivePointerTrackerCount() == 1);
             final boolean keyboardLayoutHasBeenChanged = mKeyboardLayoutHasBeenChanged;
             mKeyboardLayoutHasBeenChanged = false;
             mTimerProxy.startTypingStateTimer(key);
@@ -967,7 +967,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
             // This onPress call may have changed keyboard layout. Those cases are detected at
             // {@link #setKeyboard}. In those cases, we should update key according to the new
             // keyboard layout.
-            if (callListenerOnPressAndCheckKeyboardLayoutChange(key, false /* isRepeatKey */)) {
+            if (callListenerOnPressAndCheckKeyboardLayoutChange(key, 0 /* repeatCount */)) {
                 key = onDownKey(x, y, eventTime);
             }
 
@@ -1057,7 +1057,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
         // at {@link #setKeyboard}. In those cases, we should update key according
         // to the new keyboard layout.
         Key key = newKey;
-        if (callListenerOnPressAndCheckKeyboardLayoutChange(key, false /* isRepeatKey */)) {
+        if (callListenerOnPressAndCheckKeyboardLayoutChange(key, 0 /* repeatCount */)) {
             key = onMoveKey(x, y);
         }
         onMoveToNewKey(key, x, y);
@@ -1413,16 +1413,18 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
         // Don't start key repeat when we are in sliding input mode.
         if (mIsInSlidingKeyInput) return;
         detectAndSendKey(key, key.mX, key.mY, SystemClock.uptimeMillis());
-        mTimerProxy.startKeyRepeatTimer(this, sParams.mKeyRepeatStartTimeout);
+        final int startRepeatCount = 1;
+        mTimerProxy.startKeyRepeatTimer(this, startRepeatCount, sParams.mKeyRepeatStartTimeout);
     }
 
-    public void onKeyRepeat(final int code) {
+    public void onKeyRepeat(final int code, final int repeatCount) {
         final Key key = getKey();
         if (key == null || key.mCode != code) {
             return;
         }
-        mTimerProxy.startKeyRepeatTimer(this, sParams.mKeyRepeatInterval);
-        callListenerOnPressAndCheckKeyboardLayoutChange(key, true /* isRepeatKey */);
+        final int nextRepeatCount = repeatCount + 1;
+        mTimerProxy.startKeyRepeatTimer(this, nextRepeatCount, sParams.mKeyRepeatInterval);
+        callListenerOnPressAndCheckKeyboardLayoutChange(key, repeatCount);
         callListenerOnCodeInput(key, code, mKeyX, mKeyY, SystemClock.uptimeMillis());
     }
 
diff --git a/java/src/com/android/inputmethod/latin/AudioAndHapticFeedbackManager.java b/java/src/com/android/inputmethod/latin/AudioAndHapticFeedbackManager.java
index 42c57946da..54bc295597 100644
--- a/java/src/com/android/inputmethod/latin/AudioAndHapticFeedbackManager.java
+++ b/java/src/com/android/inputmethod/latin/AudioAndHapticFeedbackManager.java
@@ -57,10 +57,10 @@ public final class AudioAndHapticFeedbackManager {
         mVibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
     }
 
-    public void hapticAndAudioFeedback(final int primaryCode,
+    public void performHapticAndAudioFeedback(final int code,
             final View viewToPerformHapticFeedbackOn) {
-        vibrateInternal(viewToPerformHapticFeedbackOn);
-        playKeyClick(primaryCode);
+        performHapticFeedback(viewToPerformHapticFeedbackOn);
+        performAudioFeedback(code);
     }
 
     public boolean hasVibrator() {
@@ -81,14 +81,14 @@ public final class AudioAndHapticFeedbackManager {
         return mAudioManager.getRingerMode() == AudioManager.RINGER_MODE_NORMAL;
     }
 
-    private void playKeyClick(final int primaryCode) {
+    public void performAudioFeedback(final int code) {
         // if mAudioManager is null, we can't play a sound anyway, so return
         if (mAudioManager == null) {
             return;
         }
         if (mSoundOn) {
             final int sound;
-            switch (primaryCode) {
+            switch (code) {
             case Constants.CODE_DELETE:
                 sound = AudioManager.FX_KEYPRESS_DELETE;
                 break;
@@ -106,7 +106,7 @@ public final class AudioAndHapticFeedbackManager {
         }
     }
 
-    private void vibrateInternal(final View viewToPerformHapticFeedbackOn) {
+    public void performHapticFeedback(final View viewToPerformHapticFeedbackOn) {
         if (!mSettingsValues.mVibrateOn) {
             return;
         }
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index b14ee317eb..89e9f28fb4 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -122,6 +122,8 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
     private static final int PENDING_IMS_CALLBACK_DURATION = 800;
 
+    private static final int PERIOD_FOR_AUDIO_AND_HAPTIC_FEEDBACK_IN_KEY_REPEAT = 2;
+
     /**
      * The name of the scheme used by the Package Manager to warn of a new package installation,
      * replacement or removal.
@@ -1466,7 +1468,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
             break;
         case Constants.CODE_SHIFT:
             // Note: Calling back to the keyboard on Shift key is handled in
-            // {@link #onPressKey(int,boolean)} and {@link #onReleaseKey(int,boolean)}.
+            // {@link #onPressKey(int,int,boolean)} and {@link #onReleaseKey(int,boolean)}.
             final Keyboard currentKeyboard = switcher.getKeyboard();
             if (null != currentKeyboard && currentKeyboard.mId.isAlphabetKeyboard()) {
                 // TODO: Instead of checking for alphabetic keyboard here, separate keycodes for
@@ -1480,7 +1482,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
             break;
         case Constants.CODE_SWITCH_ALPHA_SYMBOL:
             // Note: Calling back to the keyboard on symbol key is handled in
-            // {@link #onPressKey(int,boolean)} and {@link #onReleaseKey(int,boolean)}.
+            // {@link #onPressKey(int,int,boolean)} and {@link #onReleaseKey(int,boolean)}.
             break;
         case Constants.CODE_SETTINGS:
             onSettingsKeyPressed();
@@ -2697,30 +2699,43 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         }
     }
 
-    private void hapticAndAudioFeedback(final int code, final boolean isRepeatKey) {
+    private void hapticAndAudioFeedback(final int code, final int repeatCount) {
         final MainKeyboardView keyboardView = mKeyboardSwitcher.getMainKeyboardView();
         if (keyboardView != null && keyboardView.isInSlidingKeyInput()) {
             // No need to feedback while sliding input.
             return;
         }
-        if (isRepeatKey) {
-            // No need to feedback when repeating key.
-            return;
+        if (repeatCount > 0) {
+            if (code == Constants.CODE_DELETE && !mConnection.canDeleteCharacters()) {
+                // No need to feedback when repeat delete key will have no effect.
+                return;
+            }
+            // TODO: Use event time that the last feedback has been generated instead of relying on
+            // a repeat count to thin out feedback.
+            if (repeatCount % PERIOD_FOR_AUDIO_AND_HAPTIC_FEEDBACK_IN_KEY_REPEAT == 0) {
+                return;
+            }
+        }
+        final AudioAndHapticFeedbackManager feedbackManager =
+                AudioAndHapticFeedbackManager.getInstance();
+        if (repeatCount == 0) {
+            // TODO: Reconsider how to perform haptic feedback when repeating key.
+            feedbackManager.performHapticFeedback(keyboardView);
         }
-        AudioAndHapticFeedbackManager.getInstance().hapticAndAudioFeedback(code, keyboardView);
+        feedbackManager.performAudioFeedback(code);
     }
 
     // Callback of the {@link KeyboardActionListener}. This is called when a key is depressed;
     // release matching call is {@link #onReleaseKey(int,boolean)} below.
     @Override
-    public void onPressKey(final int primaryCode, final boolean isRepeatKey,
+    public void onPressKey(final int primaryCode, final int repeatCount,
             final boolean isSinglePointer) {
         mKeyboardSwitcher.onPressKey(primaryCode, isSinglePointer);
-        hapticAndAudioFeedback(primaryCode, isRepeatKey);
+        hapticAndAudioFeedback(primaryCode, repeatCount);
     }
 
     // Callback of the {@link KeyboardActionListener}. This is called when a key is released;
-    // press matching call is {@link #onPressKey(int,boolean,boolean)} above.
+    // press matching call is {@link #onPressKey(int,int,boolean)} above.
     @Override
     public void onReleaseKey(final int primaryCode, final boolean withSliding) {
         mKeyboardSwitcher.onReleaseKey(primaryCode, withSliding);
diff --git a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
index 2644f3c9ca..badc942b98 100644
--- a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
+++ b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
@@ -198,7 +198,7 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
 
     @Override
     public boolean onLongClick(final View view) {
-        AudioAndHapticFeedbackManager.getInstance().hapticAndAudioFeedback(
+        AudioAndHapticFeedbackManager.getInstance().performHapticAndAudioFeedback(
                 Constants.NOT_A_CODE, this);
         return showMoreSuggestions();
     }
-- 
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