Dynamically enable spatial navigation based on events

android_webview/java/src/org/chromium/android_webview/AwContents.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.android_webview;
 
 import android.content.ComponentCallbacks2;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
@@ skipping 1208 matching lines @@
      * @see android.webkit.WebView#onKeyUp(int, KeyEvent)
      */
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         return mContentViewCore.onKeyUp(keyCode, event);
     }
 
     /**
      * @see android.webkit.WebView#dispatchKeyEvent(KeyEvent)
      */
     public boolean dispatchKeyEvent(KeyEvent event) {
+        if (AwWebContentsDelegateAdapter.getViewDirectionFromKeyEvent(event) != 0) {
+            mSettings.setSpatialNavigationEnabled(true);
+        }
         return mContentViewCore.dispatchKeyEvent(event);
     }
 
     /**
      * Clears the resource cache. Note that the cache is per-application, so this will clear the
      * cache for all WebViews used.
      *
      * @param includeDiskFiles if false, only the RAM cache is cleared
      */
     public void clearCache(boolean includeDiskFiles) {
@@ skipping 238 matching lines @@
     //--------------------------------------------------------------------------------------------
     //  View and ViewGroup method implementations
     //--------------------------------------------------------------------------------------------
 
     /**
      * @see android.webkit.View#onTouchEvent()
      */
     public boolean onTouchEvent(MotionEvent event) {
         if (mNativeAwContents == 0) return false;
 
+        if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
+            mSettings.setSpatialNavigationEnabled(false);
+        }
+
         mScrollOffsetManager.setProcessingTouchEvent(true);
         boolean rv = mContentViewCore.onTouchEvent(event);
         mScrollOffsetManager.setProcessingTouchEvent(false);
 
         if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
             int actionIndex = event.getActionIndex();
 
             // Note this will trigger IPC back to browser even if nothing is hit.
             nativeRequestNewHitTestDataAt(mNativeAwContents,
                                           (int)Math.round(event.getX(actionIndex) / mDIPScale),
@@ skipping 545 matching lines @@
     private native int nativeCapturePicture(int nativeAwContents, int width, int height);
     private native void nativeEnableOnNewPicture(int nativeAwContents, boolean enabled);
 
     private native void nativeInvokeGeolocationCallback(
             int nativeAwContents, boolean value, String requestingFrame);
 
     private native void nativeSetJsOnlineProperty(int nativeAwContents, boolean networkUp);
 
     private native void nativeTrimMemory(int nativeAwContents, int level);
 }