Set gesture exclusion rect for IMEs

Use visible inset values provided by
IMEs to set gesture exclusion rects
for the EdgeBackGestureHandler to ignore
regions where the keyboard is.
If the IME has not overridden
onComputeInsets(), InputMethodService
uses the location of R.id.inputArea
to approximate the location of where
the IME region starts.

Fixes: 141215181
Test: Tested full screen landscape keyboards
(Messenger, Hangouts), non full screen landscape
keyboards (SMS Messages), searching from the top
of the screen in the Toolbar (Google Play Store)

Change-Id: I359d719493fb92d49cd309c2d00371134cd758fe

1 files changed, 14 insertions, 1 deletions

diff --git a/core/java/android/inputmethodservice/InputMethodService.java b/core/java/android/inputmethodservice/InputMethodService.java
index 83391f368ac1..43842c5c3403 100644
--- a/core/java/android/inputmethodservice/InputMethodService.java
+++ b/core/java/android/inputmethodservice/InputMethodService.java
@@ -94,6 +94,7 @@ import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.util.Collections;
 
 /**
  * InputMethodService provides a standard implementation of an InputMethod,
@@ -434,6 +435,7 @@ public class InputMethodService extends AbstractInputMethodService {
     final int[] mTmpLocation = new int[2];
 
     final ViewTreeObserver.OnComputeInternalInsetsListener mInsetsComputer = info -> {
+        onComputeInsets(mTmpInsets);
         if (isExtractViewShown()) {
             // In true fullscreen mode, we just say the window isn't covering
             // any content so we don't impact whatever is behind.
@@ -442,12 +444,15 @@ public class InputMethodService extends AbstractInputMethodService {
             info.touchableRegion.setEmpty();
             info.setTouchableInsets(ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_FRAME);
         } else {
-            onComputeInsets(mTmpInsets);
             info.contentInsets.top = mTmpInsets.contentTopInsets;
             info.visibleInsets.top = mTmpInsets.visibleTopInsets;
             info.touchableRegion.set(mTmpInsets.touchableRegion);
             info.setTouchableInsets(mTmpInsets.touchableInsets);
         }
+
+        if (mInputFrame != null) {
+            setImeExclusionRect(mTmpInsets.visibleTopInsets);
+        }
     };
 
     final View.OnClickListener mActionClickListener = v -> {
@@ -672,6 +677,14 @@ public class InputMethodService extends AbstractInputMethodService {
         mPrivOps.setImeWindowStatus(visibilityFlags, backDisposition);
     }
 
+    /** Set region of the keyboard to be avoided from back gesture */
+    private void setImeExclusionRect(int visibleTopInsets) {
+        View inputFrameRootView = mInputFrame.getRootView();
+        Rect r = new Rect(0, visibleTopInsets, inputFrameRootView.getWidth(),
+                inputFrameRootView.getHeight());
+        inputFrameRootView.setSystemGestureExclusionRects(Collections.singletonList(r));
+    }
+
     /**
      * Concrete implementation of
      * {@link AbstractInputMethodService.AbstractInputMethodSessionImpl} that provides