Add api for systemUi getting split visibility (d69d2865) · Commits · e / os / android_frameworks_base

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreen.java

+13 −2

Original line number	Diff line number	Diff line
		@@ -17,10 +17,13 @@
		package com.android.wm.shell.splitscreen;

		import android.annotation.IntDef;
		import android.annotation.NonNull;

		import com.android.wm.shell.common.annotations.ExternalThread;
		import com.android.wm.shell.common.split.SplitLayout.SplitPosition;

		import java.util.concurrent.Executor;

		/**
		* Interface to engage split-screen feature.
		* TODO: Figure out which of these are actually needed outside of the Shell
		@@ -53,10 +56,18 @@ public interface SplitScreen {

		/** Callback interface for listening to changes in a split-screen stage. */
		interface SplitScreenListener {
		void onStagePositionChanged(@StageType int stage, @SplitPosition int position);
		void onTaskStageChanged(int taskId, @StageType int stage, boolean visible);
		default void onStagePositionChanged(@StageType int stage, @SplitPosition int position) {}
		default void onTaskStageChanged(int taskId, @StageType int stage, boolean visible) {}
		default void onSplitVisibilityChanged(boolean visible) {}
		}

		/** Registers listener that gets split screen callback. */
		void registerSplitScreenListener(@NonNull SplitScreenListener listener,
		@NonNull Executor executor);

		/** Unregisters listener that gets split screen callback. */
		void unregisterSplitScreenListener(@NonNull SplitScreenListener listener);

		/**
		* Returns a binder that can be passed to an external process to manipulate SplitScreen.
		*/

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java

+62 −0

Original line number	Diff line number	Diff line
		@@ -36,6 +36,7 @@ import android.os.Bundle;
		import android.os.IBinder;
		import android.os.RemoteException;
		import android.os.UserHandle;
		import android.util.ArrayMap;
		import android.util.Slog;
		import android.view.IRemoteAnimationFinishedCallback;
		import android.view.RemoteAnimationAdapter;
		@@ -64,6 +65,7 @@ import com.android.wm.shell.transition.LegacyTransitions;
		import com.android.wm.shell.transition.Transitions;

		import java.io.PrintWriter;
		import java.util.concurrent.Executor;

		/**
		* Class manages split-screen multitasking mode and implements the main interface
		@@ -293,6 +295,38 @@ public class SplitScreenController implements DragAndDropPolicy.Starter,
		@ExternalThread
		private class SplitScreenImpl implements SplitScreen {
		private ISplitScreenImpl mISplitScreen;
		private final ArrayMap<SplitScreenListener, Executor> mExecutors = new ArrayMap<>();
		private final SplitScreen.SplitScreenListener mListener = new SplitScreenListener() {
		@Override
		public void onStagePositionChanged(int stage, int position) {
		for (int i = 0; i < mExecutors.size(); i++) {
		final int index = i;
		mExecutors.valueAt(index).execute(() -> {
		mExecutors.keyAt(index).onStagePositionChanged(stage, position);
		});
		}
		}

		@Override
		public void onTaskStageChanged(int taskId, int stage, boolean visible) {
		for (int i = 0; i < mExecutors.size(); i++) {
		final int index = i;
		mExecutors.valueAt(index).execute(() -> {
		mExecutors.keyAt(index).onTaskStageChanged(taskId, stage, visible);
		});
		}
		}

		@Override
		public void onSplitVisibilityChanged(boolean visible) {
		for (int i = 0; i < mExecutors.size(); i++) {
		final int index = i;
		mExecutors.valueAt(index).execute(() -> {
		mExecutors.keyAt(index).onSplitVisibilityChanged(visible);
		});
		}
		}
		};

		@Override
		public ISplitScreen createExternalInterface() {
		@@ -309,6 +343,34 @@ public class SplitScreenController implements DragAndDropPolicy.Starter,
		SplitScreenController.this.onKeyguardOccludedChanged(occluded);
		});
		}

		@Override
		public void registerSplitScreenListener(SplitScreenListener listener, Executor executor) {
		if (mExecutors.containsKey(listener)) return;

		mMainExecutor.execute(() -> {
		if (mExecutors.size() == 0) {
		SplitScreenController.this.registerSplitScreenListener(mListener);
		}

		mExecutors.put(listener, executor);
		});

		executor.execute(() -> {
		mStageCoordinator.sendStatusToListener(listener);
		});
		}

		@Override
		public void unregisterSplitScreenListener(SplitScreenListener listener) {
		mMainExecutor.execute(() -> {
		mExecutors.remove(listener);

		if (mExecutors.size() == 0) {
		SplitScreenController.this.unregisterSplitScreenListener(mListener);
		}
		});
		}
		}

		/**

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/StageCoordinator.java

+17 −4

Original line number	Diff line number	Diff line
		@@ -501,16 +501,21 @@ class StageCoordinator implements SplitLayout.SplitLayoutHandler,
		void registerSplitScreenListener(SplitScreen.SplitScreenListener listener) {
		if (mListeners.contains(listener)) return;
		mListeners.add(listener);
		listener.onStagePositionChanged(STAGE_TYPE_MAIN, getMainStagePosition());
		listener.onStagePositionChanged(STAGE_TYPE_SIDE, getSideStagePosition());
		mSideStage.onSplitScreenListenerRegistered(listener, STAGE_TYPE_SIDE);
		mMainStage.onSplitScreenListenerRegistered(listener, STAGE_TYPE_MAIN);
		sendStatusToListener(listener);
		}

		void unregisterSplitScreenListener(SplitScreen.SplitScreenListener listener) {
		mListeners.remove(listener);
		}

		void sendStatusToListener(SplitScreen.SplitScreenListener listener) {
		listener.onStagePositionChanged(STAGE_TYPE_MAIN, getMainStagePosition());
		listener.onStagePositionChanged(STAGE_TYPE_SIDE, getSideStagePosition());
		listener.onSplitVisibilityChanged(isSplitScreenVisible());
		mSideStage.onSplitScreenListenerRegistered(listener, STAGE_TYPE_SIDE);
		mMainStage.onSplitScreenListenerRegistered(listener, STAGE_TYPE_MAIN);
		}

		private void sendOnStagePositionChanged() {
		for (int i = mListeners.size() - 1; i >= 0; --i) {
		final SplitScreen.SplitScreenListener l = mListeners.get(i);
		@@ -535,6 +540,13 @@ class StageCoordinator implements SplitLayout.SplitLayoutHandler,
		}
		}

		private void sendSplitVisibilityChanged() {
		for (int i = mListeners.size() - 1; i >= 0; --i) {
		final SplitScreen.SplitScreenListener l = mListeners.get(i);
		l.onSplitVisibilityChanged(mDividerVisible);
		}
		}

		private void onStageRootTaskAppeared(StageListenerImpl stageListener) {
		if (mMainStageListener.mHasRootTask && mSideStageListener.mHasRootTask) {
		mUseLegacySplit = mContext.getResources().getBoolean(R.bool.config_useLegacySplit);
		@@ -574,6 +586,7 @@ class StageCoordinator implements SplitLayout.SplitLayoutHandler,
		} else {
		mSplitLayout.release();
		}
		sendSplitVisibilityChanged();
		}

		private void onStageVisibilityChanged(StageListenerImpl stageListener) {