1 files changed, 75 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/latin/ClipTouchEventWindowCallback.java b/java/src/com/android/inputmethod/latin/ClipTouchEventWindowCallback.java
new file mode 100644
index 000000000..d12c70075
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/ClipTouchEventWindowCallback.java
@@ -0,0 +1,75 @@
+/*
+ * 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.latin;
+
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.Window;
+
+public class ClipTouchEventWindowCallback extends WindowCallbackAdapter {
+    private final View mDecorView;
+    private final int mKeyboardBottomRowVerticalCorrection;
+
+    public ClipTouchEventWindowCallback(Window window, int keyboardBottomRowVerticalCorrection) {
+        super(window.getCallback());
+        mDecorView = window.getDecorView();
+        mKeyboardBottomRowVerticalCorrection = keyboardBottomRowVerticalCorrection;
+    }
+
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent me) {
+        final int height = mDecorView.getHeight();
+        final MotionEvent event = clipMotionEvent(me, height,
+                height + mKeyboardBottomRowVerticalCorrection);
+        return super.dispatchTouchEvent(event);
+    }
+
+    private static MotionEvent clipMotionEvent(MotionEvent me, int minHeight, int maxHeight) {
+        final int pointerCount = me.getPointerCount();
+        boolean shouldClip = false;
+        for (int pointerIndex = 0; pointerIndex < pointerCount; pointerIndex++) {
+            final float y = me.getY(pointerIndex);
+            if (y >= minHeight && y < maxHeight) {
+                shouldClip = true;
+                break;
+            }
+        }
+        if (!shouldClip)
+            return me;
+
+        if (pointerCount == 1) {
+            me.setLocation(me.getX(), minHeight - 1);
+            return me;
+        }
+
+        final int[] pointerIds = new int[pointerCount];
+        final MotionEvent.PointerCoords[] pointerCoords =
+                new MotionEvent.PointerCoords[pointerCount];
+        for (int pointerIndex = 0; pointerIndex < pointerCount; pointerIndex++) {
+            pointerIds[pointerIndex] = me.getPointerId(pointerIndex);
+            final MotionEvent.PointerCoords coords = new MotionEvent.PointerCoords();
+            me.getPointerCoords(pointerIndex, coords);
+            pointerCoords[pointerIndex] = coords;
+            if (coords.y >= minHeight && coords.y < maxHeight)
+                coords.y = minHeight - 1;
+        }
+        return MotionEvent.obtain(
+                me.getDownTime(), me.getEventTime(), me.getAction(), pointerCount, pointerIds,
+                pointerCoords, me.getMetaState(), me.getXPrecision(), me.getYPrecision(),
+                me.getDeviceId(), me.getEdgeFlags(), me.getSource(), me.getFlags());
+    }
+}