Introduce DisplayAreaGroup (416269ee) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/wm/DisplayAreaPolicyBuilder.java

+149 −24

Original line number	Diff line number	Diff line
		@@ -23,20 +23,24 @@ import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
		import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;
		import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
		import static android.view.WindowManagerPolicyConstants.APPLICATION_LAYER;
		import static android.window.DisplayAreaOrganizer.FEATURE_DEFAULT_TASK_CONTAINER;

		import android.annotation.Nullable;
		import android.os.Bundle;
		import android.util.ArrayMap;
		import android.util.ArraySet;

		import com.android.internal.annotations.VisibleForTesting;
		import com.android.internal.util.Preconditions;
		import com.android.server.policy.WindowManagerPolicy;

		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.Collections;
		import java.util.Comparator;
		import java.util.List;
		import java.util.Map;
		import java.util.Objects;
		import java.util.Set;
		import java.util.function.BiFunction;

		/**
		* A builder for instantiating a complex {@link DisplayAreaPolicy}
		@@ -70,22 +74,93 @@ import java.util.Objects;
		*/
		class DisplayAreaPolicyBuilder {
		@Nullable private HierarchyBuilder mRootHierarchyBuilder;
		private ArrayList<HierarchyBuilder> mDisplayAreaGroupHierarchyBuilders = new ArrayList<>();

		/** Defines the root hierarchy. */
		/**
		* When a window is created, the policy will use this function to select the
		* {@link RootDisplayArea} to place that window in. The selected root can be either the one of
		* the {@link #mRootHierarchyBuilder} or the one of any of the
		* {@link #mDisplayAreaGroupHierarchyBuilders}.
		**/
		@Nullable private BiFunction<WindowToken, Bundle, RootDisplayArea> mSelectRootForWindowFunc;

		/** Defines the root hierarchy for the whole logical display. */
		DisplayAreaPolicyBuilder setRootHierarchy(HierarchyBuilder rootHierarchyBuilder) {
		// TODO(b/157683117): Add method to add sub root and root choosing func.
		mRootHierarchyBuilder = rootHierarchyBuilder;
		return this;
		}

		/**
		* Defines a DisplayAreaGroup hierarchy. Its root will be added as a child of the root
		* hierarchy.
		*/
		DisplayAreaPolicyBuilder addDisplayAreaGroupHierarchy(
		HierarchyBuilder displayAreaGroupHierarchy) {
		mDisplayAreaGroupHierarchyBuilders.add(displayAreaGroupHierarchy);
		return this;
		}

		/** The policy will use this function to find the root to place windows in. */
		DisplayAreaPolicyBuilder setSelectRootForWindowFunc(
		BiFunction<WindowToken, Bundle, RootDisplayArea> selectRootForWindowFunc) {
		mSelectRootForWindowFunc = selectRootForWindowFunc;
		return this;
		}

		/** Makes sure the setting meets the requirement. */
		private void validate() {
		if (mRootHierarchyBuilder == null) {
		throw new IllegalStateException("Root must be set for the display area policy.");
		}

		boolean containsImeContainer = mRootHierarchyBuilder.mImeContainer != null;
		boolean containsDefaultTda = containsDefaultTaskDisplayArea(mRootHierarchyBuilder);
		for (int i = 0; i < mDisplayAreaGroupHierarchyBuilders.size(); i++) {
		HierarchyBuilder hierarchyBuilder = mDisplayAreaGroupHierarchyBuilders.get(i);
		if (hierarchyBuilder.mTaskDisplayAreas.isEmpty()) {
		throw new IllegalStateException(
		"DisplayAreaGroup must contain at least one TaskDisplayArea.");
		}

		containsImeContainer = containsImeContainer \|\| hierarchyBuilder.mImeContainer != null;
		containsDefaultTda = containsDefaultTda
		\|\| containsDefaultTaskDisplayArea(hierarchyBuilder);
		}

		if (!containsImeContainer) {
		throw new IllegalStateException("IME container must be set.");
		}

		if (!containsDefaultTda) {
		throw new IllegalStateException("There must be a default TaskDisplayArea.");
		}
		}

		/** Checks if the given hierarchy contains the default {@link TaskDisplayArea}. */
		private static boolean containsDefaultTaskDisplayArea(HierarchyBuilder displayAreaHierarchy) {
		for (int i = 0; i < displayAreaHierarchy.mTaskDisplayAreas.size(); i++) {
		if (displayAreaHierarchy.mTaskDisplayAreas.get(i).mFeatureId
		== FEATURE_DEFAULT_TASK_CONTAINER) {
		return true;
		}
		}
		return false;
		}

		Result build(WindowManagerService wmService) {
		Objects.requireNonNull(mRootHierarchyBuilder,
		"Root must be set for the display area policy.");
		Objects.requireNonNull(mRootHierarchyBuilder.mImeContainer, "Ime must not be null");
		Preconditions.checkCollectionNotEmpty(mRootHierarchyBuilder.mTaskDisplayAreas,
		"TaskDisplayAreas must not be empty");
		mRootHierarchyBuilder.build();
		return new Result(wmService, mRootHierarchyBuilder.mRoot);
		validate();

		// Attach DA group roots to screen hierarchy before adding windows to group hierarchies.
		mRootHierarchyBuilder.build(mDisplayAreaGroupHierarchyBuilders);
		List<RootDisplayArea> displayAreaGroupRoots = new ArrayList<>(
		mDisplayAreaGroupHierarchyBuilders.size());
		for (int i = 0; i < mDisplayAreaGroupHierarchyBuilders.size(); i++) {
		HierarchyBuilder hierarchyBuilder = mDisplayAreaGroupHierarchyBuilders.get(i);
		hierarchyBuilder.build();
		displayAreaGroupRoots.add(hierarchyBuilder.mRoot);
		}
		return new Result(wmService, mRootHierarchyBuilder.mRoot, displayAreaGroupRoots,
		mSelectRootForWindowFunc);
		}

		/**
		@@ -131,6 +206,14 @@ class DisplayAreaPolicyBuilder {

		/** Builds the {@link DisplayArea} hierarchy below root. */
		private void build() {
		build(null /* displayAreaGroupHierarchyBuilders */);
		}

		/**
		* Builds the {@link DisplayArea} hierarchy below root. And adds the roots of those
		* {@link HierarchyBuilder} as children.
		*/
		private void build(@Nullable List<HierarchyBuilder> displayAreaGroupHierarchyBuilders) {
		final WindowManagerPolicy policy = mRoot.mWmService.mPolicy;
		final int maxWindowLayerCount = policy.getMaxWindowLayer();
		final DisplayArea.Tokens[] displayAreaForLayer =
		@@ -215,7 +298,9 @@ class DisplayAreaPolicyBuilder {
		if (leafType == LEAF_TYPE_TASK_CONTAINERS) {
		// We use the passed in TaskDisplayAreas for task container type of layer.
		// Skip creating Tokens even if there is no TDA.
		addTaskDisplayAreasToLayer(areaForLayer[layer]);
		addTaskDisplayAreasToApplicationLayer(areaForLayer[layer]);
		addDisplayAreaGroupsToApplicationLayer(areaForLayer[layer],
		displayAreaGroupHierarchyBuilders);
		leafArea.mSkipTokens = true;
		} else if (leafType == LEAF_TYPE_IME_CONTAINERS) {
		// We use the passed in ImeContainer for ime container type of layer.
		@@ -234,11 +319,11 @@ class DisplayAreaPolicyBuilder {

		// Notify the root that we have finished attaching all the DisplayAreas. Cache all the
		// feature related collections there for fast access.
		mRoot.onHierarchyBuilt(mFeatures, displayAreaForLayer, featureAreas, mTaskDisplayAreas);
		mRoot.onHierarchyBuilt(mFeatures, displayAreaForLayer, featureAreas);
		}

		/** Adds all {@link TaskDisplayArea} to the specified layer */
		private void addTaskDisplayAreasToLayer(PendingArea parentPendingArea) {
		/** Adds all {@link TaskDisplayArea} to the application layer. */
		private void addTaskDisplayAreasToApplicationLayer(PendingArea parentPendingArea) {
		final int count = mTaskDisplayAreas.size();
		for (int i = 0; i < count; i++) {
		PendingArea leafArea =
		@@ -249,6 +334,24 @@ class DisplayAreaPolicyBuilder {
		}
		}

		/** Adds roots of the DisplayAreaGroups to the application layer. */
		private void addDisplayAreaGroupsToApplicationLayer(
		DisplayAreaPolicyBuilder.PendingArea parentPendingArea,
		@Nullable List<HierarchyBuilder> displayAreaGroupHierarchyBuilders) {
		if (displayAreaGroupHierarchyBuilders == null) {
		return;
		}
		final int count = displayAreaGroupHierarchyBuilders.size();
		for (int i = 0; i < count; i++) {
		DisplayAreaPolicyBuilder.PendingArea
		leafArea = new DisplayAreaPolicyBuilder.PendingArea(
		null /* feature */, APPLICATION_LAYER, parentPendingArea);
		leafArea.mExisting = displayAreaGroupHierarchyBuilders.get(i).mRoot;
		leafArea.mMaxLayer = APPLICATION_LAYER;
		parentPendingArea.mChildren.add(leafArea);
		}
		}

		private static int typeOfLayer(WindowManagerPolicy policy, int layer) {
		if (layer == APPLICATION_LAYER) {
		return LEAF_TYPE_TASK_CONTAINERS;
		@@ -401,9 +504,20 @@ class DisplayAreaPolicyBuilder {
		}

		static class Result extends DisplayAreaPolicy {
		final List<RootDisplayArea> mDisplayAreaGroupRoots;
		final BiFunction<WindowToken, Bundle, RootDisplayArea> mSelectRootForWindowFunc;

		Result(WindowManagerService wmService, RootDisplayArea root) {
		Result(WindowManagerService wmService, RootDisplayArea root,
		List<RootDisplayArea> displayAreaGroupRoots,
		@Nullable BiFunction<WindowToken, Bundle, RootDisplayArea>
		selectRootForWindowFunc) {
		super(wmService, root);
		mDisplayAreaGroupRoots = Collections.unmodifiableList(displayAreaGroupRoots);
		mSelectRootForWindowFunc = selectRootForWindowFunc == null
		// Always return the highest level root of the logical display when the func is
		// not specified.
		? (window, options) -> mRoot
		: selectRootForWindowFunc;
		}

		@Override
		@@ -414,27 +528,38 @@ class DisplayAreaPolicyBuilder {

		@VisibleForTesting
		DisplayArea.Tokens findAreaForToken(WindowToken token) {
		// TODO(b/157683117): Choose root/sub root from OEM provided func.
		return mRoot.findAreaForToken(token);
		return mSelectRootForWindowFunc.apply(token, token.mOptions).findAreaForToken(token);
		}

		@VisibleForTesting
		List<Feature> getFeatures() {
		// TODO(b/157683117): Also get feature from sub root.
		return new ArrayList<>(mRoot.mFeatures);
		Set<Feature> features = new ArraySet<>();
		features.addAll(mRoot.mFeatures);
		for (int i = 0; i < mDisplayAreaGroupRoots.size(); i++) {
		features.addAll(mDisplayAreaGroupRoots.get(i).mFeatures);
		}
		return new ArrayList<>(features);
		}

		@Override
		public List<DisplayArea<? extends WindowContainer>> getDisplayAreas(int featureId) {
		// TODO(b/157683117): Also get display areas from sub root.
		List<Feature> features = getFeatures();
		List<DisplayArea<? extends WindowContainer>> displayAreas = new ArrayList<>();
		getDisplayAreas(mRoot, featureId, displayAreas);
		for (int i = 0; i < mDisplayAreaGroupRoots.size(); i++) {
		getDisplayAreas(mDisplayAreaGroupRoots.get(i), featureId, displayAreas);
		}
		return displayAreas;
		}

		private static void getDisplayAreas(RootDisplayArea root, int featureId,
		List<DisplayArea<? extends WindowContainer>> displayAreas) {
		List<Feature> features = root.mFeatures;
		for (int i = 0; i < features.size(); i++) {
		Feature feature = features.get(i);
		if (feature.mId == featureId) {
		return new ArrayList<>(mRoot.mFeatureToDisplayAreas.get(feature));
		displayAreas.addAll(root.mFeatureToDisplayAreas.get(feature));
		}
		}
		return new ArrayList<>();
		}
		}

services/core/java/com/android/server/wm/DisplayContent.java

+2 −1

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
		import static android.view.WindowManager.TRANSIT_ACTIVITY_OPEN;
		import static android.view.WindowManager.TRANSIT_TASK_OPEN;
		import static android.view.WindowManager.TRANSIT_TASK_TO_FRONT;
		import static android.window.DisplayAreaOrganizer.FEATURE_ROOT;
		import static android.window.DisplayAreaOrganizer.FEATURE_WINDOWED_MAGNIFICATION;

		import static com.android.server.policy.WindowManagerPolicy.FINISH_LAYOUT_REDO_ANIM;
		@@ -910,7 +911,7 @@ class DisplayContent extends RootDisplayArea implements WindowManagerPolicy.Disp
		* @param root {@link RootWindowContainer}
		*/
		DisplayContent(Display display, RootWindowContainer root) {
		super(root.mWindowManager);
		super(root.mWindowManager, "DisplayContent", FEATURE_ROOT);
		if (mWmService.mRoot.getDisplayContent(display.getDisplayId()) != null) {
		throw new IllegalArgumentException("Display with ID=" + display.getDisplayId()
		+ " already exists="

services/core/java/com/android/server/wm/RootDisplayArea.java

+3 −14

Original line number	Diff line number	Diff line
		@@ -17,7 +17,6 @@
		package com.android.server.wm;

		import static android.view.WindowManagerPolicyConstants.APPLICATION_LAYER;
		import static android.window.DisplayAreaOrganizer.FEATURE_ROOT;

		import static com.android.server.wm.DisplayAreaPolicyBuilder.Feature;

		@@ -44,19 +43,11 @@ class RootDisplayArea extends DisplayArea<DisplayArea> {
		/** Mapping from window layer to {@link DisplayArea.Tokens} that holds windows on that layer. */
		private DisplayArea.Tokens[] mAreaForLayer;

		/**
		* List of {@link TaskDisplayArea} that are attached to this {@link DisplayArea} hierarchy. The
		* order is the same as their z-order.
		*
		* TODO(b/157683117): Instead of caching the TDAs, always traverse the hierarchy to get them.
		*/
		ArrayList<TaskDisplayArea> mTaskDisplayAreas;

		/** Whether the hierarchy has been built. */
		private boolean mHasBuiltHierarchy;

		RootDisplayArea(WindowManagerService wms) {
		super(wms, Type.ANY, "RootDisplayArea", FEATURE_ROOT);
		RootDisplayArea(WindowManagerService wms, String name, int featureId) {
		super(wms, Type.ANY, name, featureId);
		}

		/** Finds the {@link DisplayArea.Tokens} that this type of window should be attached to. */
		@@ -73,15 +64,13 @@ class RootDisplayArea extends DisplayArea<DisplayArea> {

		/** Callback after {@link DisplayArea} hierarchy has been built. */
		void onHierarchyBuilt(ArrayList<Feature> features, DisplayArea.Tokens[] areaForLayer,
		Map<Feature, List<DisplayArea<? extends WindowContainer>>> featureToDisplayAreas,
		ArrayList<TaskDisplayArea> taskDisplayAreas) {
		Map<Feature, List<DisplayArea<? extends WindowContainer>>> featureToDisplayAreas) {
		if (mHasBuiltHierarchy) {
		throw new IllegalStateException("Root should only build the hierarchy once");
		}
		mHasBuiltHierarchy = true;
		mFeatures = Collections.unmodifiableList(features);
		mAreaForLayer = areaForLayer;
		mTaskDisplayAreas = taskDisplayAreas;
		mFeatureToDisplayAreas = featureToDisplayAreas;
		}
		}

services/core/java/com/android/server/wm/WallpaperWindowToken.java

+9 −1

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		package com.android.server.wm;

		import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
		import static android.os.Process.INVALID_UID;
		import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;

		import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_LAYERS;
		@@ -24,6 +25,7 @@ import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_WALLPAPER_LIG
		import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;
		import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;

		import android.annotation.Nullable;
		import android.os.Bundle;
		import android.os.IBinder;
		import android.os.RemoteException;
		@@ -44,7 +46,13 @@ class WallpaperWindowToken extends WindowToken {

		WallpaperWindowToken(WindowManagerService service, IBinder token, boolean explicit,
		DisplayContent dc, boolean ownerCanManageAppTokens) {
		super(service, token, TYPE_WALLPAPER, explicit, dc, ownerCanManageAppTokens);
		this(service, token, explicit, dc, ownerCanManageAppTokens, null /* options */);
		}

		WallpaperWindowToken(WindowManagerService service, IBinder token, boolean explicit,
		DisplayContent dc, boolean ownerCanManageAppTokens, @Nullable Bundle options) {
		super(service, token, TYPE_WALLPAPER, explicit, dc, ownerCanManageAppTokens, INVALID_UID,
		false /* roundedCornerOverlay /, false / fromClientToken */, options);
		dc.mWallpaperController.addWallpaperToken(this);
		setWindowingMode(WINDOWING_MODE_FULLSCREEN);
		}

services/core/java/com/android/server/wm/WindowManagerService.java

+3 −2

Original line number	Diff line number	Diff line
		@@ -2670,10 +2670,11 @@ public class WindowManagerService extends IWindowManager.Stub
		}
		// TODO(window-container): Clean up dead tokens
		if (type == TYPE_WALLPAPER) {
		new WallpaperWindowToken(this, binder, true, dc, callerCanManageAppTokens);
		new WallpaperWindowToken(this, binder, true, dc, callerCanManageAppTokens,
		options);
		} else {
		new WindowToken(this, binder, type, true, dc, callerCanManageAppTokens,
		callingUid, false /* roundedCornerOverlay */, fromClientToken);
		callingUid, false /* roundedCornerOverlay */, fromClientToken, options);
		}
		}
		} finally {