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Commit 8f2a800d authored by Andrii Kulian's avatar Andrii Kulian Committed by Automerger Merge Worker
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Add support for sticky placeholders am: b777d358 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16169736

Change-Id: Ifafdb32ba32de01702b75db6b9abcef6d305f754
parents 53419f06 b777d358

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

+7 −0
Original line number Diff line number Diff line
@@ -84,6 +84,13 @@ class SplitContainer { 
        return shouldFinishSecondaryWithPrimary || isPlaceholderContainer;

    }



    static boolean isStickyPlaceholderRule(@NonNull SplitRule splitRule) {

        if (!(splitRule instanceof SplitPlaceholderRule)) {

            return false;

        }

        return ((SplitPlaceholderRule) splitRule).isSticky();

    }



    @Override

    public String toString() {

        return "SplitContainer{"

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

+47 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ 


package androidx.window.extensions.embedding;



import static androidx.window.extensions.embedding.SplitContainer.isStickyPlaceholderRule;



import android.annotation.NonNull;

import android.annotation.Nullable;

import android.app.Activity;
@@ -460,6 +462,11 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen 
            return false;

        }



        if (isStickyPlaceholderRule(splitContainer.getSplitRule())) {

            // The placeholder should remain after it was first shown.

            return false;

        }



        if (mPresenter.shouldShowSideBySide(splitContainer)) {

            return false;

        }
@@ -643,6 +650,46 @@ public class SplitController implements JetpackTaskFragmentOrganizer.TaskFragmen 
        return false;

    }



    /**

     * Checks whether the associated container should be destroyed together with a finishing

     * container. There is a case when primary containers for placeholders should be retained

     * despite the rule configuration to finish primary with secondary - if they are marked as

     * 'sticky' and the placeholder was finished when fully overlapping the primary container.

     * @return {@code true} if the associated container should be retained (and not be finished).

     */

    boolean shouldRetainAssociatedContainer(@NonNull TaskFragmentContainer finishingContainer,

            @NonNull TaskFragmentContainer associatedContainer) {

        SplitContainer splitContainer = getActiveSplitForContainers(associatedContainer,

                finishingContainer);

        if (splitContainer == null) {

            // Containers are not in the same split, no need to retain.

            return false;

        }



        if (!isStickyPlaceholderRule(splitContainer.getSplitRule())) {

            // Currently only the containers associated with sticky placeholders can be retained.

            return false;

        }



        // When sticky placeholder is stacked on top of the main container it should not cause the

        // destruction of the primary one.

        return !mPresenter.shouldShowSideBySide(splitContainer);

    }



    /**

     * @see #shouldRetainAssociatedContainer(TaskFragmentContainer, TaskFragmentContainer)

     */

    boolean shouldRetainAssociatedActivity(@NonNull TaskFragmentContainer finishingContainer,

            @NonNull Activity associatedActivity) {

        TaskFragmentContainer associatedContainer = getContainerWithActivity(

                associatedActivity.getActivityToken());

        if (associatedContainer == null) {

            return false;

        }



        return shouldRetainAssociatedContainer(finishingContainer, associatedContainer);

    }



    private final class LifecycleCallbacks implements ActivityLifecycleCallbacks {



        @Override

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

+6 −0
Original line number Diff line number Diff line
@@ -228,6 +228,9 @@ class TaskFragmentContainer { 


        // Finish dependent containers

        for (TaskFragmentContainer container : mContainersToFinishOnExit) {

            if (controller.shouldRetainAssociatedContainer(this, container)) {

                continue;

            }

            container.finish(true /* shouldFinishDependent */, presenter,

                    wct, controller);

        }
@@ -235,6 +238,9 @@ class TaskFragmentContainer { 


        // Finish associated activities

        for (Activity activity : mActivitiesToFinishOnExit) {

            if (controller.shouldRetainAssociatedActivity(this, activity)) {

                continue;

            }

            activity.finish();

        }

        mActivitiesToFinishOnExit.clear();