1 files changed, 64 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/MoreKeysDetector.java b/java/src/com/android/inputmethod/keyboard/MoreKeysDetector.java
new file mode 100644
index 000000000..d20204611
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/MoreKeysDetector.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.keyboard;
+
+import java.util.List;
+
+public class MoreKeysDetector extends KeyDetector {
+    private final int mSlideAllowanceSquare;
+    private final int mSlideAllowanceSquareTop;
+
+    public MoreKeysDetector(float slideAllowance) {
+        super(/* keyHysteresisDistance */0);
+        mSlideAllowanceSquare = (int)(slideAllowance * slideAllowance);
+        // Top slide allowance is slightly longer (sqrt(2) times) than other edges.
+        mSlideAllowanceSquareTop = mSlideAllowanceSquare * 2;
+    }
+
+    @Override
+    public boolean alwaysAllowsSlidingInput() {
+        return true;
+    }
+
+    @Override
+    protected int getMaxNearbyKeys() {
+        // No nearby key will be returned.
+        return 1;
+    }
+
+    @Override
+    public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes) {
+        final List<Key> keys = getKeyboard().mKeys;
+        final int touchX = getTouchX(x);
+        final int touchY = getTouchY(y);
+
+        int nearestIndex = NOT_A_KEY;
+        int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare;
+        final int keyCount = keys.size();
+        for (int index = 0; index < keyCount; index++) {
+            final int dist = keys.get(index).squaredDistanceToEdge(touchX, touchY);
+            if (dist < nearestDist) {
+                nearestIndex = index;
+                nearestDist = dist;
+            }
+        }
+
+        if (allCodes != null && nearestIndex != NOT_A_KEY)
+            allCodes[0] = keys.get(nearestIndex).mCode;
+        return nearestIndex;
+    }
+}
+\ No newline at end of file