Merge "Remove touch dead zone"

java/src/com/android/inputmethod/keyboard/KeyDetector.java

@@ -97,21 +97,21 @@ public class KeyDetector {
 
     /**
      * Computes maximum size of the array that can contain all nearby key codes returned by
-     * {@link #getKeyAndNearbyCodes}.
+     * {@link #getNearbyCodes}.
      *
      * @return Returns maximum size of the array that can contain all nearby key codes returned
-     *         by {@link #getKeyAndNearbyCodes}.
+     *         by {@link #getNearbyCodes}.
      */
     protected int getMaxNearbyKeys() {
         return MAX_NEARBY_KEYS;
     }
 
     /**
-     * Allocates array that can hold all key codes returned by {@link #getKeyAndNearbyCodes}
+     * Allocates array that can hold all key codes returned by {@link #getNearbyCodes}
      * method. The maximum size of the array should be computed by {@link #getMaxNearbyKeys}.
      *
      * @return Allocates and returns an array that can hold all key codes returned by
-     *         {@link #getKeyAndNearbyCodes} method. All elements in the returned array are
+     *         {@link #getNearbyCodes} method. All elements in the returned array are
      *         initialized by {@link #NOT_A_CODE} value.
      */
     public int[] newCodeArray() {
@@ -222,15 +222,15 @@ public class KeyDetector {
      * @param x The x-coordinate of a touch point
      * @param y The y-coordinate of a touch point
      * @param allCodes All nearby key codes except functional key are returned in this array
-     * @return The nearest key
      */
-    public Key getKeyAndNearbyCodes(int x, int y, final int[] allCodes) {
+    // TODO: Move this method to native code.
+    public void getNearbyCodes(int x, int y, final int[] allCodes) {
         final int touchX = getTouchX(x);
         final int touchY = getTouchY(y);
 
         initializeNearbyKeys();
         Key primaryKey = null;
-        for (final Key key: mKeyboard.getNearestKeys(touchX, touchY)) {
+        for (final Key key : mKeyboard.getNearestKeys(touchX, touchY)) {
             final boolean isOnKey = key.isOnKey(touchX, touchY);
             final int distance = key.squaredDistanceToEdge(touchX, touchY);
             if (isOnKey || (mProximityCorrectOn && distance < mProximityThresholdSquare)) {
@@ -241,7 +241,6 @@ public class KeyDetector {
             }
         }
 
-        if (allCodes != null && allCodes.length > 0) {
         getNearbyKeyCodes(primaryKey != null ? primaryKey.mCode : NOT_A_CODE, allCodes);
         if (DEBUG) {
             Log.d(TAG, "x=" + x + " y=" + y
@@ -250,7 +249,23 @@ public class KeyDetector {
         }
     }
 
-        return primaryKey;
+    /**
+     * Detect the key whose hitbox the touch point is in.
+     *
+     * @param x The x-coordinate of a touch point
+     * @param y The y-coordinate of a touch point
+     * @return the key that the touch point hits.
+     */
+    public Key detectHitKey(int x, int y) {
+        final int touchX = getTouchX(x);
+        final int touchY = getTouchY(y);
+
+        for (final Key key : mKeyboard.getNearestKeys(touchX, touchY)) {
+            if (key.isOnKey(touchX, touchY)) {
+                return key;
+            }
+        }
+        return null;
     }
 
     public static String printableCode(Key key) {

java/src/com/android/inputmethod/keyboard/MoreKeysDetector.java

@@ -39,7 +39,7 @@ public class MoreKeysDetector extends KeyDetector {
     }
 
     @Override
-    public Key getKeyAndNearbyCodes(int x, int y, final int[] allCodes) {
+    public void getNearbyCodes(int x, int y, final int[] allCodes) {
         final int touchX = getTouchX(x);
         final int touchY = getTouchY(y);
 
@@ -53,8 +53,26 @@ public class MoreKeysDetector extends KeyDetector {
             }
         }
 
-        if (allCodes != null && nearestKey != null) {
+        if (nearestKey != null) {
             allCodes[0] = nearestKey.mCode;
+        } else {
+            allCodes[0] = NOT_A_CODE;
+        }
+    }
+
+    @Override
+    public Key detectHitKey(int x, int y) {
+        final int touchX = getTouchX(x);
+        final int touchY = getTouchY(y);
+
+        Key nearestKey = null;
+        int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare;
+        for (final Key key : getKeyboard().mKeys) {
+            final int dist = key.squaredDistanceToEdge(touchX, touchY);
+            if (dist < nearestDist) {
+                nearestKey = key;
+                nearestDist = dist;
+            }
         }
         return nearestKey;
     }

java/src/com/android/inputmethod/keyboard/PointerTracker.java

@@ -318,7 +318,7 @@ public class PointerTracker {
     }
 
     public Key getKeyOn(int x, int y) {
-        return mKeyDetector.getKeyAndNearbyCodes(x, y, null);
+        return mKeyDetector.detectHitKey(x, y);
     }
 
     private void setReleasedKeyGraphics(Key key) {
@@ -421,7 +421,7 @@ public class PointerTracker {
     private Key onMoveKeyInternal(int x, int y) {
         mLastX = x;
         mLastY = y;
-        return mKeyDetector.getKeyAndNearbyCodes(x, y, null);
+        return mKeyDetector.detectHitKey(x, y);
     }
 
     private Key onMoveKey(int x, int y) {
@@ -748,7 +748,7 @@ public class PointerTracker {
     private long mPreviousEventTime;
 
     private void printTouchEvent(String title, int x, int y, long eventTime) {
-        final Key key = mKeyDetector.getKeyAndNearbyCodes(x, y, null);
+        final Key key = mKeyDetector.detectHitKey(x, y);
         final String code = KeyDetector.printableCode(key);
         final long delta = eventTime - mPreviousEventTime;
         Log.d(TAG, String.format("%s%s[%d] %4d %4d %5d %s", title,

java/src/com/android/inputmethod/latin/WordComposer.java

@@ -141,7 +141,7 @@ public class WordComposer {
             keyY = y;
         } else {
             codes = keyDetector.newCodeArray();
-            keyDetector.getKeyAndNearbyCodes(x, y, codes);
+            keyDetector.getNearbyCodes(x, y, codes);
             keyX = keyDetector.getTouchX(x);
             keyY = keyDetector.getTouchY(y);
         }
@@ -204,7 +204,7 @@ public class WordComposer {
                 final int x = key.mX + key.mWidth / 2;
                 final int y = key.mY + key.mHeight / 2;
                 final int[] codes = keyDetector.newCodeArray();
-                keyDetector.getKeyAndNearbyCodes(x, y, codes);
+                keyDetector.getNearbyCodes(x, y, codes);
                 add(codePoint, codes, x, y);
                 return;
             }