Introducing split-screen windowing modes.

WINDOWING_MODE_SPLIT_SCREEN_PRIMARY is what used to be the docked
windowing mode and is used to indicated the primary container
dirving the split-screen windowing mode.
WINDOWING_MODE_SPLIT_SCREEN_SECONDARY is the windowing mode of any
container to the side/adjacent to the primary split-screen container.
For example, any container that was in fullscreen mode and that should
now be adjacent to the primary split-screen container will.

Test: go/wm-smoke
Test: WM Unit tests via TreeHugger
Change-Id: Idc8560073c613c708cb40ba8449641a6be11d9f1

1 files changed, 26 insertions, 5 deletions

diff --git a/core/java/android/app/WindowConfiguration.java b/core/java/android/app/WindowConfiguration.java
index b69cd026776b..515248512255 100644
--- a/core/java/android/app/WindowConfiguration.java
+++ b/core/java/android/app/WindowConfiguration.java
@@ -57,19 +57,26 @@ public class WindowConfiguration implements Parcelable, Comparable<WindowConfigu
     /** Always on-top (always visible). of other siblings in its parent container.
      * @hide */
     public static final int WINDOWING_MODE_PINNED = 2;
-    /** Occupies a dedicated region of the screen or its parent container.
+    /** The primary container driving the screen to be in split-screen mode.
      * @hide */
-    public static final int WINDOWING_MODE_DOCKED = 3;
+    public static final int WINDOWING_MODE_SPLIT_SCREEN_PRIMARY = 3;
+    /**
+     * The containers adjacent to the {@link #WINDOWING_MODE_SPLIT_SCREEN_PRIMARY} container in
+     * split-screen mode.
+     * @hide
+     */
+    public static final int WINDOWING_MODE_SPLIT_SCREEN_SECONDARY = 4;
     /** Can be freely resized within its parent container.
      * @hide */
-    public static final int WINDOWING_MODE_FREEFORM = 4;
+    public static final int WINDOWING_MODE_FREEFORM = 5;
 
     /** @hide */
     @IntDef({
             WINDOWING_MODE_UNDEFINED,
             WINDOWING_MODE_FULLSCREEN,
             WINDOWING_MODE_PINNED,
-            WINDOWING_MODE_DOCKED,
+            WINDOWING_MODE_SPLIT_SCREEN_PRIMARY,
+            WINDOWING_MODE_SPLIT_SCREEN_SECONDARY,
             WINDOWING_MODE_FREEFORM,
     })
     public @interface WindowingMode {}
@@ -469,12 +476,26 @@ public class WindowConfiguration implements Parcelable, Comparable<WindowConfigu
         return mWindowingMode == WINDOWING_MODE_PINNED;
     }
 
+    /**
+     * Returns true if this container can be put in either
+     * {@link #WINDOWING_MODE_SPLIT_SCREEN_PRIMARY} or
+     * {@link #WINDOWING_MODE_SPLIT_SCREEN_SECONDARY} windowing modes based on its current state.
+     * @hide
+     */
+    public boolean supportSplitScreenWindowingMode() {
+        if (mActivityType == ACTIVITY_TYPE_ASSISTANT) {
+            return false;
+        }
+        return mWindowingMode != WINDOWING_MODE_FREEFORM && mWindowingMode != WINDOWING_MODE_PINNED;
+    }
+
     private static String windowingModeToString(@WindowingMode int windowingMode) {
         switch (windowingMode) {
             case WINDOWING_MODE_UNDEFINED: return "undefined";
             case WINDOWING_MODE_FULLSCREEN: return "fullscreen";
             case WINDOWING_MODE_PINNED: return "pinned";
-            case WINDOWING_MODE_DOCKED: return "docked";
+            case WINDOWING_MODE_SPLIT_SCREEN_PRIMARY: return "split-screen-primary";
+            case WINDOWING_MODE_SPLIT_SCREEN_SECONDARY: return "split-screen-secondary";
             case WINDOWING_MODE_FREEFORM: return "freeform";
         }
         return String.valueOf(windowingMode);