Clip touch event at SoftInputWindow to handle the event from Inset

Bug: 3238092
Change-Id: I92d98bed75957c8db149e1ad87defe24d44f4d53

1 files changed, 57 insertions, 0 deletions

diff --git a/core/java/android/inputmethodservice/SoftInputWindow.java b/core/java/android/inputmethodservice/SoftInputWindow.java
index 6a54846..343242e 100644
--- a/core/java/android/inputmethodservice/SoftInputWindow.java
+++ b/core/java/android/inputmethodservice/SoftInputWindow.java
@@ -19,11 +19,16 @@ package android.inputmethodservice;
 import android.app.Dialog;
 import android.content.Context;
 import android.content.pm.ActivityInfo;
+import android.graphics.Rect;
 import android.os.IBinder;
 import android.view.Gravity;
 import android.view.KeyEvent;
+import android.view.MotionEvent;
+import android.view.View;
 import android.view.WindowManager;
 
+import java.lang.Math;
+
 /**
  * A SoftInputWindow is a Dialog that is intended to be used for a top-level input
  * method window.  It will be displayed along the edge of the screen, moving
@@ -32,6 +37,7 @@ import android.view.WindowManager;
  */
 class SoftInputWindow extends Dialog {
     final KeyEvent.DispatcherState mDispatcherState;
+    private final Rect mBounds = new Rect();
     
     public void setToken(IBinder token) {
         WindowManager.LayoutParams lp = getWindow().getAttributes();
@@ -64,6 +70,13 @@ class SoftInputWindow extends Dialog {
         mDispatcherState.reset();
     }
 
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        getWindow().getDecorView().getHitRect(mBounds);
+        final MotionEvent event = clipMotionEvent(ev, mBounds);
+        return super.dispatchTouchEvent(event);
+    }
+
     /**
      * Get the size of the DockWindow.
      * 
@@ -150,4 +163,48 @@ class SoftInputWindow extends Dialog {
                 WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
                 WindowManager.LayoutParams.FLAG_DIM_BEHIND);
     }
+
+    private static MotionEvent clipMotionEvent(MotionEvent me, Rect bounds) {
+        final int pointerCount = me.getPointerCount();
+        boolean shouldClip = false;
+        for (int pointerIndex = 0; pointerIndex < pointerCount; pointerIndex++) {
+            final int x = (int)me.getX(pointerIndex);
+            final int y = (int)me.getY(pointerIndex);
+            if (!bounds.contains(x, y)) {
+                shouldClip = true;
+                break;
+            }
+        }
+        if (!shouldClip)
+            return me;
+
+        if (pointerCount == 1) {
+            final int x = (int)me.getX();
+            final int y = (int)me.getY();
+            me.setLocation(
+                    Math.max(bounds.left, Math.min(x, bounds.right - 1)),
+                    Math.max(bounds.top, Math.min(y, bounds.bottom - 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;
+            final int x = (int)coords.x;
+            final int y = (int)coords.y;
+            if (!bounds.contains(x, y)) {
+                coords.x = Math.max(bounds.left, Math.min(x, bounds.right - 1));
+                coords.y = Math.max(bounds.top, Math.min(y, bounds.bottom - 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());
+    }
 }