[Remoting Android] Enable Rich Input Support

remoting/android/java/src/org/chromium/chromoting/DesktopView.java

Index: remoting/android/java/src/org/chromium/chromoting/DesktopView.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/DesktopView.java b/remoting/android/java/src/org/chromium/chromoting/DesktopView.java
index ae3bbd8d7d7d4bfbf263c9b79f6c1461338e81c8..b4b4ae21b3deea0148c00374854edcbae46e8ec0 100644
--- a/remoting/android/java/src/org/chromium/chromoting/DesktopView.java
+++ b/remoting/android/java/src/org/chromium/chromoting/DesktopView.java
@@ -7,8 +7,10 @@ package org.chromium.chromoting;
 import android.content.Context;
 import android.text.InputType;
 import android.util.AttributeSet;
+import android.view.KeyEvent;
 import android.view.MotionEvent;
 import android.view.SurfaceView;
+import android.view.inputmethod.BaseInputConnection;
 import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputMethodManager;
@@ -86,8 +88,8 @@ public final class DesktopView extends SurfaceView {
     /** Called when a software keyboard is requested, and specifies its options. */
     @Override
     public final InputConnection onCreateInputConnection(EditorInfo outAttrs) {
-        // Disables rich input support and instead requests simple key events.
-        outAttrs.inputType = InputType.TYPE_NULL;
+        // Enable rich input support and disable suggestions.
+        outAttrs.inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS;
 
         // Prevents most third-party IMEs from ignoring our Activity's adjustResize preference.
         outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_FULLSCREEN;
@@ -98,7 +100,18 @@ public final class DesktopView extends SurfaceView {
         // Stops software keyboards from closing as soon as the enter key is pressed.
         outAttrs.imeOptions |= EditorInfo.IME_MASK_ACTION | EditorInfo.IME_FLAG_NO_ENTER_ACTION;
 
-        return null;
+        return new BaseInputConnection(this, false) {
+            public boolean deleteSurroundingText(int beforeLength, int afterLength) {
+                // This is to fix the backspace functionality of the soft keyboard. The default
+                // connection will try to delete the last character in the context while DesktopView
+                // doesn't have a text context so we need to manually handle the backspace case.
+                if (beforeLength == 1 && afterLength == 0) {
+                    return sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL))
+                            && sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DEL));
+                }
+                return super.deleteSurroundingText(beforeLength, afterLength);
+            }
+        };
     }
 
     /** Called whenever the user attempts to touch the canvas. */