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Commit 140a0590 authored by Robin Lee's avatar Robin Lee
Browse files

Run keyguard occlusion update after transitions 

Earlier code was calling applyKeyguardOcclusionChange as soon as the
transition starts, which is not very effective because some of the
transitions only update keyguard occluded state at the end of the
animation and race behind this call.

If we wait for all transitions to finish playing before validating
keyguard occlusion, the last word always comes from
applyKeyguardOcclusionChange which synchronises the source of truth
in KeyguardController over to SystemUI.

Test: atest android.server.wm.KeyguardTests
Bug: 275650364
Change-Id: I016b72b87baadb63f3f5f83112901315f29d2f0a
parent c951ebd9

services/core/java/com/android/server/policy/PhoneWindowManager.java

+10 −7
Original line number Diff line number Diff line
@@ -3573,15 +3573,17 @@ public class PhoneWindowManager implements WindowManagerPolicy { 


    @Override

    public int applyKeyguardOcclusionChange() {

        if (mKeyguardOccludedChanged) {

            if (DEBUG_KEYGUARD) Slog.d(TAG, "transition/occluded changed occluded="

        if (DEBUG_KEYGUARD) Slog.d(TAG, "transition/occluded commit occluded="

                + mPendingKeyguardOccluded);



        // TODO(b/276433230): Explicitly save before/after for occlude state in each

        // Transition so we don't need to update SysUI every time.

        if (setKeyguardOccludedLw(mPendingKeyguardOccluded)) {

            return FINISH_LAYOUT_REDO_LAYOUT | FINISH_LAYOUT_REDO_WALLPAPER;

            }

        }

        } else {

            return 0;

        }

    }



    /**

     * Called when keyguard related app transition starts, or cancelled.
@@ -3858,6 +3860,7 @@ public class PhoneWindowManager implements WindowManagerPolicy { 
    private boolean setKeyguardOccludedLw(boolean isOccluded) {

        if (DEBUG_KEYGUARD) Slog.d(TAG, "setKeyguardOccluded occluded=" + isOccluded);

        mKeyguardOccludedChanged = false;

        mPendingKeyguardOccluded = isOccluded;

        mKeyguardDelegate.setOccluded(isOccluded, true /* notify */);

        return mKeyguardDelegate.isShowing();

    }

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

+8 −15
Original line number Diff line number Diff line
@@ -1019,6 +1019,7 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener { 
            dc.removeImeSurfaceImmediately();

            dc.handleCompleteDeferredRemoval();

        }

        validateKeyguardOcclusion();

        validateVisibility();



        mState = STATE_FINISHED;
@@ -1175,8 +1176,6 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener { 
            if (mRecentsDisplayId != INVALID_DISPLAY) break;

        }



        handleNonAppWindowsInTransition(mType, mFlags);



        // The callback is only populated for custom activity-level client animations

        sendRemoteCallback(mClientAnimationStartCallback);
@@ -1480,19 +1479,6 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener { 
        }

    }



    private void handleNonAppWindowsInTransition(

            @TransitionType int transit, @TransitionFlags int flags) {

        if ((flags & TRANSIT_FLAG_KEYGUARD_LOCKED) != 0) {

            // If the occlusion changed but the transition isn't an occlude/unocclude transition,

            // then we have to notify KeyguardService directly. This can happen if there is

            // another ongoing transition when the app changes occlusion OR if the app dies or

            // is killed. Both of these are common during tests.

            if (transit != TRANSIT_KEYGUARD_OCCLUDE && transit != TRANSIT_KEYGUARD_UNOCCLUDE) {

                mController.mAtm.mWindowManager.mPolicy.applyKeyguardOcclusionChange();

            }

        }

    }



    private void reportStartReasonsToLogger() {

        // Record transition start in metrics logger. We just assume everything is "DRAWN"

        // at this point since splash-screen is a presentation (shell) detail.
@@ -2185,6 +2171,13 @@ class Transition implements BLASTSyncEngine.TransactionReadyListener { 
        return mainWin.getAttrs().rotationAnimation;

    }



    private void validateKeyguardOcclusion() {

        if ((mFlags & TRANSIT_FLAG_KEYGUARD_LOCKED) != 0) {

            mController.mStateValidators.add(

                mController.mAtm.mWindowManager.mPolicy::applyKeyguardOcclusionChange);

        }

    }



    private void validateVisibility() {

        for (int i = mTargets.size() - 1; i >= 0; --i) {

            if (reduceMode(mTargets.get(i).mReadyMode) != TRANSIT_CLOSE) {