Camera: Cleanup hardware key handling

* Fix power shutter behaviour in camcorder mode
* Disable volume change while in panorama mode, volume buttons should only
handle camera operations while in the camera
* Add camera/power/volume key shutter handling in panorama mode

On devices with a hardware camera key:
* Disable power & volume shutter features
* Volume buttons control the zoom

On devices without a hardware camera key:
* When power shutter is disabled, volume buttons control the shutter (like AOSP)
* When power shutter is enabled, volume buttons control the zoom

Change-Id: I141946d5b6f5aec8b1e9a9f99270d30295596079
diff --git a/src/com/android/camera/CameraActivity.java b/src/com/android/camera/CameraActivity.java
index 4763d93..eee1191 100644
--- a/src/com/android/camera/CameraActivity.java
+++ b/src/com/android/camera/CameraActivity.java
@@ -1421,7 +1421,9 @@
     protected void initPowerShutter(ComboPreferences prefs) {
         String val = prefs.getString(CameraSettings.KEY_POWER_SHUTTER,
                 getResources().getString(R.string.pref_camera_power_shutter_default));
-        mPowerShutter = val.equals(CameraSettings.VALUE_ON);
+        if (!CameraUtil.hasCameraKey()) {
+            mPowerShutter = val.equals(CameraSettings.VALUE_ON);
+        }
         if (mPowerShutter /*TODO: && mShowCameraAppView*/) {
             getWindow().addFlags(WindowManager.LayoutParams.PREVENT_POWER_KEY);
         } else {
diff --git a/src/com/android/camera/CameraSettings.java b/src/com/android/camera/CameraSettings.java
index 428765c..e4f3db4 100644
--- a/src/com/android/camera/CameraSettings.java
+++ b/src/com/android/camera/CameraSettings.java
@@ -413,6 +413,7 @@
         ListPreference cameraHdr = group.findPreference(KEY_CAMERA_HDR);
         ListPreference disMode = group.findPreference(KEY_DIS);
         ListPreference cameraHdrPlus = group.findPreference(KEY_CAMERA_HDR_PLUS);
+        ListPreference powerShutter = group.findPreference(KEY_POWER_SHUTTER);
         ListPreference beautyMode = group.findPreference(KEY_BEAUTY_MODE);
         ListPreference slowShutter = group.findPreference(KEY_SLOW_SHUTTER);
         ListPreference asd = group.findPreference(KEY_ASD);
@@ -473,6 +474,9 @@
                 !GcamHelper.hasGcamCapture() || isFrontCamera)) {
             removePreference(group, cameraHdrPlus.getKey());
         }
+        if (powerShutter != null && CameraUtil.hasCameraKey()) {
+            removePreference(group, powerShutter.getKey());
+        }
         if (beautyMode != null) {
             if (!isBeautyModeSupported(mParameters)) {
                 removePreference(group, beautyMode.getKey());
diff --git a/src/com/android/camera/PhotoModule.java b/src/com/android/camera/PhotoModule.java
index 930a160..2250e28 100644
--- a/src/com/android/camera/PhotoModule.java
+++ b/src/com/android/camera/PhotoModule.java
@@ -1951,13 +1951,21 @@
             case KeyEvent.KEYCODE_VOLUME_UP:
                 if (/*TODO: mActivity.isInCameraApp() &&*/ mFirstTimeInitialized
                     && (mUI.mMenuInitialized)) {
-                    mUI.onScaleStepResize(true);
+                    if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                        onShutterButtonFocus(true);
+                    } else {
+                        mUI.onScaleStepResize(true);
+                    }
                 }
                 return true;
             case KeyEvent.KEYCODE_VOLUME_DOWN:
                 if (/*TODO: mActivity.isInCameraApp() &&*/ mFirstTimeInitialized
                     && (mUI.mMenuInitialized)) {
-                    mUI.onScaleStepResize(false);
+                   if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                        onShutterButtonFocus(true);
+                    } else {
+                        mUI.onScaleStepResize(false);
+                    }
                 }
                 return true;
             case KeyEvent.KEYCODE_FOCUS:
@@ -1987,7 +1995,7 @@
                 return true;
             case KeyEvent.KEYCODE_POWER:
                 if (mFirstTimeInitialized && event.getRepeatCount() == 0
-                        && CameraActivity.mPowerShutter) {
+                        && CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
                     onShutterButtonFocus(true);
                 }
                 return true;
@@ -2003,6 +2011,10 @@
         switch (keyCode) {
             case KeyEvent.KEYCODE_VOLUME_UP:
             case KeyEvent.KEYCODE_VOLUME_DOWN:
+                if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()
+                        && mFirstTimeInitialized) {
+                    onShutterButtonClick();
+                }
                 return true;
             case KeyEvent.KEYCODE_FOCUS:
                 if (mFirstTimeInitialized) {
@@ -2010,7 +2022,8 @@
                 }
                 return true;
             case KeyEvent.KEYCODE_POWER:
-                if (CameraActivity.mPowerShutter && mFirstTimeInitialized) {
+                if (CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()
+                        && mFirstTimeInitialized) {
                     onShutterButtonClick();
                 }
                 return true;
diff --git a/src/com/android/camera/VideoModule.java b/src/com/android/camera/VideoModule.java
index b62d26c..9097389 100644
--- a/src/com/android/camera/VideoModule.java
+++ b/src/com/android/camera/VideoModule.java
@@ -1167,26 +1167,42 @@
 
         switch (keyCode) {
             case KeyEvent.KEYCODE_VOLUME_UP:
-                mUI.onScaleStepResize(true);
+                if (event.getRepeatCount() == 0 && !CameraActivity.mPowerShutter &&
+                        !CameraUtil.hasCameraKey()) {
+                    mUI.clickShutter();
+                } else {
+                    mUI.onScaleStepResize(true);
+                }
                 return true;
             case KeyEvent.KEYCODE_VOLUME_DOWN:
-                mUI.onScaleStepResize(false);
+                if (event.getRepeatCount() == 0 && !CameraActivity.mPowerShutter &&
+                        !CameraUtil.hasCameraKey()) {
+                    mUI.clickShutter();
+                } else {
+                    mUI.onScaleStepResize(false);
+                }
                 return true;
             case KeyEvent.KEYCODE_CAMERA:
                 if (event.getRepeatCount() == 0) {
                     mUI.clickShutter();
-                    return true;
                 }
-                break;
+                return true;
             case KeyEvent.KEYCODE_DPAD_CENTER:
                 if (event.getRepeatCount() == 0) {
                     mUI.clickShutter();
+                }
+                return true;
+            case KeyEvent.KEYCODE_POWER:
+                if (event.getRepeatCount() == 0 && CameraActivity.mPowerShutter &&
+                        !CameraUtil.hasCameraKey()) {
+                    mUI.clickShutter();
+                }
+                return true;
+            case KeyEvent.KEYCODE_MENU:
+                if (mMediaRecorderRecording) {
                     return true;
                 }
                 break;
-            case KeyEvent.KEYCODE_MENU:
-                if (mMediaRecorderRecording) return true;
-                break;
         }
         return false;
     }
@@ -1195,14 +1211,21 @@
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         switch (keyCode) {
             case KeyEvent.KEYCODE_VOLUME_UP:
+                if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                    mUI.pressShutter(false);
+                }
+                return true;
             case KeyEvent.KEYCODE_VOLUME_DOWN:
+                if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                    mUI.pressShutter(false);
+                }
                 return true;
             case KeyEvent.KEYCODE_CAMERA:
                 mUI.pressShutter(false);
                 return true;
             case KeyEvent.KEYCODE_POWER:
-                if (CameraActivity.mPowerShutter) {
-                    onShutterButtonClick();
+                if (CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                    mUI.pressShutter(false);
                 }
                 return true;
         }
diff --git a/src/com/android/camera/WideAnglePanoramaModule.java b/src/com/android/camera/WideAnglePanoramaModule.java
index 3487835..faacf74 100644
--- a/src/com/android/camera/WideAnglePanoramaModule.java
+++ b/src/com/android/camera/WideAnglePanoramaModule.java
@@ -271,6 +271,9 @@
             mActivity.updateStorageSpaceAndHint();
         }
 
+        // Power shutter
+        mActivity.initPowerShutter(mPreferences);
+
         mMainHandler = new Handler() {
             @Override
             public void handleMessage(Message msg) {
@@ -840,6 +843,10 @@
         }
         mUI.showPreviewCover();
         releaseCamera();
+
+        // Load the power shutter
+        mActivity.initPowerShutter(mPreferences);
+
         synchronized (mRendererLock) {
             mCameraTexture = null;
 
@@ -1101,14 +1108,38 @@
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
     }
 
-
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_VOLUME_UP:
+            case KeyEvent.KEYCODE_VOLUME_DOWN:
+                return true;
+            case KeyEvent.KEYCODE_CAMERA:
+                if (event.getRepeatCount() == 0) {
+                    onShutterButtonClick();
+                }
+                return true;
+            case KeyEvent.KEYCODE_POWER:
+                return true;
+        }
         return false;
     }
 
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_VOLUME_UP:
+            case KeyEvent.KEYCODE_VOLUME_DOWN:
+                if (!CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                    onShutterButtonClick();
+                }
+                return true;
+            case KeyEvent.KEYCODE_POWER:
+                if (CameraActivity.mPowerShutter && !CameraUtil.hasCameraKey()) {
+                    onShutterButtonClick();
+                }
+                return true;
+        }
         return false;
     }
 
diff --git a/src/com/android/camera/util/CameraUtil.java b/src/com/android/camera/util/CameraUtil.java
index 8bf9074..3788e95 100644
--- a/src/com/android/camera/util/CameraUtil.java
+++ b/src/com/android/camera/util/CameraUtil.java
@@ -118,6 +118,9 @@
     public static final String TRUE = "true";
     public static final String FALSE = "false";
 
+    // Hardware camera key mask
+    private static final int KEY_MASK_CAMERA = 0x20;
+
     private static boolean sEnableZSL;
 
     // Do not change the focus mode when TTF is used
@@ -161,6 +164,10 @@
         return (supported != null) && supported.contains(SCENE_MODE_ASD) && (params.get("asd-mode") != null);
     }
 
+    public static boolean hasCameraKey() {
+        return (sDeviceKeysPresent & KEY_MASK_CAMERA) != 0;
+    }
+
     public static boolean isMeteringAreaSupported(Parameters params) {
         return params.getMaxNumMeteringAreas() > 0;
     }
@@ -196,6 +203,9 @@
     // Use samsung HDR format
     private static boolean sSamsungHDRFormat;
 
+    // Get available hardware keys
+    private static int sDeviceKeysPresent;
+
     private CameraUtil() {
     }
 
@@ -211,6 +221,8 @@
         sNoFocusModeChangeForTouch = context.getResources().getBoolean(
                 R.bool.useContinuosFocusForTouch);
         sSamsungHDRFormat = context.getResources().getBoolean(R.bool.needsSamsungHDRFormat);
+        sDeviceKeysPresent = context.getResources().getInteger(
+                com.android.internal.R.integer.config_deviceHardwareKeys);
     }
 
     public static int dpToPixel(int dp) {