ActivityEmbedding: launch into the same side container (d530d65c) · Commits · e / os / android_frameworks_base

libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/SplitController.java

+73 −9

Original line number	Diff line number	Diff line
		@@ -806,8 +806,8 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen

		if (shouldExpand(null, intent, getSplitRules())) {
		setLaunchingInExpandedContainer(launchingActivity, options);
		} else if (!setLaunchingToSideContainer(launchingActivity, intent, options)) {
		setLaunchingInSameContainer(launchingActivity, intent, options);
		} else if (!splitWithLaunchingActivity(launchingActivity, intent, options)) {
		setLaunchingInSameSideContainer(launchingActivity, intent, options);
		}

		return super.onStartActivity(who, intent, options);
		@@ -826,9 +826,9 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
		/**
		* Returns {@code true} if the activity that is going to be started via the
		* {@code intent} should be paired with the {@code launchingActivity} and is set to be
		* launched in an empty side container.
		* launched in the side container.
		*/
		private boolean setLaunchingToSideContainer(Activity launchingActivity, Intent intent,
		private boolean splitWithLaunchingActivity(Activity launchingActivity, Intent intent,
		Bundle options) {
		final SplitPairRule splitPairRule = getSplitRule(launchingActivity, intent,
		getSplitRules());
		@@ -836,9 +836,14 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
		return false;
		}

		// Create a new split with an empty side container
		final TaskFragmentContainer secondaryContainer = mPresenter
		// Check if there is any existing side container to launch into.
		TaskFragmentContainer secondaryContainer = findSideContainerForNewLaunch(
		launchingActivity, splitPairRule);
		if (secondaryContainer == null) {
		// Create a new split with an empty side container.
		secondaryContainer = mPresenter
		.createNewSplitWithEmptySideContainer(launchingActivity, splitPairRule);
		}

		// Amend the request to let the WM know that the activity should be placed in the
		// dedicated container.
		@@ -847,13 +852,40 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
		return true;
		}

		/**
		* Finds if there is an existing split side {@link TaskFragmentContainer} that can be used
		* for the new rule.
		*/
		@Nullable
		private TaskFragmentContainer findSideContainerForNewLaunch(Activity launchingActivity,
		SplitPairRule splitPairRule) {
		final TaskFragmentContainer launchingContainer = getContainerWithActivity(
		launchingActivity.getActivityToken());
		if (launchingContainer == null) {
		return null;
		}

		// We only check if the launching activity is the primary of the split. We will check
		// if the launching activity is the secondary in #setLaunchingInSameSideContainer.
		final SplitContainer splitContainer = getActiveSplitForContainer(launchingContainer);
		if (splitContainer == null
		\|\| splitContainer.getPrimaryContainer() != launchingContainer) {
		return null;
		}

		if (canReuseContainer(splitPairRule, splitContainer.getSplitRule())) {
		return splitContainer.getSecondaryContainer();
		}
		return null;
		}

		/**
		* Checks if the activity that is going to be started via the {@code intent} should be
		* paired with the existing top activity which is currently paired with the
		* {@code launchingActivity}. If so, set the activity to be launched in the same
		* {@code launchingActivity}. If so, set the activity to be launched in the same side
		* container of the {@code launchingActivity}.
		*/
		private void setLaunchingInSameContainer(Activity launchingActivity, Intent intent,
		private void setLaunchingInSameSideContainer(Activity launchingActivity, Intent intent,
		Bundle options) {
		final TaskFragmentContainer launchingContainer = getContainerWithActivity(
		launchingActivity.getActivityToken());
		@@ -884,6 +916,11 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
		return;
		}

		// Can only launch in the same container if the rules share the same presentation.
		if (!canReuseContainer(splitPairRule, splitContainer.getSplitRule())) {
		return;
		}

		// Amend the request to let the WM know that the activity should be placed in the
		// dedicated container. This is necessary for the case that the activity is started
		// into a new Task, or new Task will be escaped from the current host Task and be
		@@ -900,4 +937,31 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen
		public boolean isActivityEmbedded(@NonNull Activity activity) {
		return mPresenter.isActivityEmbedded(activity.getActivityToken());
		}

		/**
		* If the two rules have the same presentation, we can reuse the same {@link SplitContainer} if
		* there is any.
		*/
		private static boolean canReuseContainer(SplitRule rule1, SplitRule rule2) {
		if (!isContainerReusableRule(rule1) \|\| !isContainerReusableRule(rule2)) {
		return false;
		}
		return rule1.getSplitRatio() == rule2.getSplitRatio()
		&& rule1.getLayoutDirection() == rule2.getLayoutDirection();
		}

		/**
		* Whether it is ok for other rule to reuse the {@link TaskFragmentContainer} of the given
		* rule.
		*/
		private static boolean isContainerReusableRule(SplitRule rule) {
		// We don't expect to reuse the placeholder rule.
		if (!(rule instanceof SplitPairRule)) {
		return false;
		}
		final SplitPairRule pairRule = (SplitPairRule) rule;

		// Not reuse if it needs to destroy the existing.
		return !pairRule.shouldClearTop();
		}
		}