Forward port 'Swap volume buttons' (2/3)

[mikeioannina]: Adjust for 5.0 changes

Change-Id: I5ed4ae2b7e69e2ada067ed1d3524b3d3fad30e2e

2 files changed, 34 insertions, 9 deletions

diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 271b5d4..f89953c 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -116,9 +116,9 @@ static inline const char* toString(bool value) {
 }
 
 static int32_t rotateValueUsingRotationMap(int32_t value, int32_t orientation,
-        const int32_t map[][4], size_t mapSize) {
+        const int32_t map[][4], size_t mapSize, int32_t rotationMapOffset) {
     if (orientation != DISPLAY_ORIENTATION_0) {
-        for (size_t i = 0; i < mapSize; i++) {
+        for (size_t i = rotationMapOffset; i < mapSize; i++) {
             if (value == map[i][0]) {
                 return map[i][orientation];
             }
@@ -130,6 +130,16 @@ static int32_t rotateValueUsingRotationMap(int32_t value, int32_t orientation,
 static const int32_t keyCodeRotationMap[][4] = {
         // key codes enumerated counter-clockwise with the original (unrotated) key first
         // no rotation,        90 degree rotation,  180 degree rotation, 270 degree rotation
+
+        // volume keys - tablet
+        { AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_DOWN },
+        { AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_UP },
+
+        // volume keys - phone or hybrid
+        { AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_UP },
+        { AKEYCODE_VOLUME_DOWN, AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_UP,   AKEYCODE_VOLUME_DOWN },
+
+        // dpad keys - common
         { AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT },
         { AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN },
         { AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT },
@@ -138,9 +148,9 @@ static const int32_t keyCodeRotationMap[][4] = {
 static const size_t keyCodeRotationMapSize =
         sizeof(keyCodeRotationMap) / sizeof(keyCodeRotationMap[0]);
 
-static int32_t rotateKeyCode(int32_t keyCode, int32_t orientation) {
+static int32_t rotateKeyCode(int32_t keyCode, int32_t orientation, int32_t rotationMapOffset) {
     return rotateValueUsingRotationMap(keyCode, orientation,
-            keyCodeRotationMap, keyCodeRotationMapSize);
+            keyCodeRotationMap, keyCodeRotationMapSize, rotationMapOffset);
 }
 
 static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
@@ -2131,10 +2141,16 @@ void KeyboardInputMapper::configure(nsecs_t when,
             mOrientation = DISPLAY_ORIENTATION_0;
         }
     }
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_VOLUME_KEYS_ROTATION)) {
+        // mode 0 (disabled) ~ offset 4
+        // mode 1 (phone) ~ offset 2
+        // mode 2 (tablet) ~ offset 0
+        mRotationMapOffset = 4 - 2 * config->volumeKeysRotationMode;
+    }
 }
 
 void KeyboardInputMapper::configureParameters() {
-    mParameters.orientationAware = false;
+    mParameters.orientationAware = !getDevice()->isExternal();
     getDevice()->getConfiguration().tryGetProperty(String8("keyboard.orientationAware"),
             mParameters.orientationAware);
 
@@ -2214,7 +2230,7 @@ void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t keyCode,
     if (down) {
         // Rotate key codes according to orientation if needed.
         if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
-            keyCode = rotateKeyCode(keyCode, mOrientation);
+            keyCode = rotateKeyCode(keyCode, mOrientation, mRotationMapOffset);
         }
 
         // Add key down.
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 3b783c1..22a5dc8 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -144,6 +144,9 @@ struct InputReaderConfiguration {
         // The presence of an external stylus has changed.
         CHANGE_EXTERNAL_STYLUS_PRESENCE = 1 << 7,
 
+        // Volume keys rotation option changed.
+        CHANGE_VOLUME_KEYS_ROTATION = 1 << 7,
+
         // All devices must be reopened.
         CHANGE_MUST_REOPEN = 1 << 31,
     };
@@ -230,7 +233,11 @@ struct InputReaderConfiguration {
 
     // True to show the location of touches on the touch screen as spots.
     bool showTouches;
-    
+
+    // Remap volume keys according to display rotation
+    // 0 - disabled, 1 - phone or hybrid rotation mode, 2 - tablet rotation mode
+    int volumeKeysRotationMode;
+
     // Ignore finger touches this long after the stylus has been used (including hover)
     nsecs_t stylusPalmRejectionTime;
 
@@ -251,7 +258,8 @@ struct InputReaderConfiguration {
             pointerGestureMovementSpeedRatio(0.8f),
             pointerGestureZoomSpeedRatio(0.3f),
             stylusPalmRejectionTime(50 * 10000000LL), // 50 ms
-            showTouches(false) { }
+            showTouches(false),
+            volumeKeysRotationMode(0) { }
 
     bool getDisplayInfo(bool external, DisplayViewport* outViewport) const;
     void setDisplayInfo(bool external, const DisplayViewport& viewport);
@@ -1130,7 +1138,8 @@ private:
     uint32_t mSource;
     int32_t mKeyboardType;
 
-    int32_t mOrientation; // orientation for dpad keys
+    int32_t mRotationMapOffset; // determines if and how volume keys rotate
+    int32_t mOrientation; // orientation for dpad and volume keys
 
     Vector<KeyDown> mKeyDowns; // keys that are down
     int32_t mMetaState;