Support invoking key shortcuts using Control.

This enables Select All, Cut, Copy and Paste behavior in TextViews
and provides a general pattern for implementing additional keyboard
accelerators based on Control key shortcuts.  The same shortcuts
also apply to menu accelerators.

Bug: 3286262
Change-Id: I7d458ee26abf51e0de1735ce490ce3baf504b471

1 files changed, 10 insertions, 0 deletions

diff --git a/core/java/android/view/ViewRoot.java b/core/java/android/view/ViewRoot.java
index 281dd2771d7c..5d8170274a01 100644
--- a/core/java/android/view/ViewRoot.java
+++ b/core/java/android/view/ViewRoot.java
@@ -2626,6 +2626,16 @@ public final class ViewRoot extends Handler implements ViewParent,
             return;
         }
 
+        // If the Control modifier is held, try to interpret the key as a shortcut.
+        if (event.getAction() == KeyEvent.ACTION_UP
+                && event.isCtrlPressed()
+                && !KeyEvent.isModifierKey(event.getKeyCode())) {
+            if (mView.dispatchKeyShortcutEvent(event)) {
+                finishKeyEvent(event, sendDone, true);
+                return;
+            }
+        }
+
         // Apply the fallback event policy.
         if (mFallbackEventHandler.dispatchKeyEvent(event)) {
             finishKeyEvent(event, sendDone, true);