Refactoring of the screen magnification feature.

1. This patch takes care of the case where a magnified window is covering an unmagnigied
   one. One example is a dialog that covers the IME window.

bug:7634430

2. Ensuring that the UI automator tool can connect and correctly dump the screen.

bug:7694696

3. Removed the partial implementation for multi display magnification. It adds
   unnecessary complexity since it cannot be implemented without support for
   input from multiple screens. We will revisit when necessary.

4. Moved the magnified border window as a surface in the window manager.

5. Moved the mediator APIs on the window manager and the policy methods on the
   WindowManagerPolicy.

6. Implemented batch event processing for the accessibility input filter.

Change-Id: I4ebf68b94fb07201e124794f69611ece388ec116

1 files changed, 19 insertions, 0 deletions

diff --git a/core/java/android/view/WindowManagerPolicy.java b/core/java/android/view/WindowManagerPolicy.java
index 7bdb44c80595..47ef638b41d2 100644
--- a/core/java/android/view/WindowManagerPolicy.java
+++ b/core/java/android/view/WindowManagerPolicy.java
@@ -1134,4 +1134,23 @@ public interface WindowManagerPolicy {
      * {@link android.content.Intent#ACTION_ASSIST}
      */
     public void showAssistant();
+
+    /**
+     * Returns whether a given window type can be magnified.
+     *
+     * @param windowType The window type.
+     * @return True if the window can be magnified.
+     */
+    public boolean canMagnifyWindow(int windowType);
+
+    /**
+     * Returns whether a given window type is considered a top level one.
+     * A top level window does not have a container, i.e. attached window,
+     * or if it has a container it is laid out as a top-level window, not
+     * as a child of its container.
+     *
+     * @param windowType The window type.
+     * @return True if the window is a top level one.
+     */
+    public boolean isTopLevelWindow(int windowType);
 }