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Making activity invisible when occluded by one of the adjacent TF

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Multiple TaskFragments can be added in a leaf Task for activity
embedding use case. Unlike split-screen use case, the adjacent
TaskFragments are not always positioned next to each other.
There could have a TaskFragment positioned in between two adjacent
TaskFragments.

Bug: 204185619
Test: atest SplitActivityLifecycleTest

Change-Id: I27295a8176c61044bd8e92d70cb1aa422e3e88f6
This commit is contained in:
Louis Chang
2021-10-26 17:12:41 +08:00
parent 5170817dea
commit ce07b079f0
1 changed files with 14 additions and 0 deletions
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14
services/core/java/com/android/server/wm/TaskFragment.java
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@@ -778,6 +778,7 @@ class TaskFragment extends WindowContainer<WindowContainer> {
boolean gotOpaqueSplitScreenPrimary = false;
boolean gotOpaqueSplitScreenSecondary = false;
boolean gotTranslucentFullscreen = false;
boolean gotTranslucentAdjacent = false;
boolean gotTranslucentSplitScreenPrimary = false;
boolean gotTranslucentSplitScreenSecondary = false;
boolean shouldBeVisible = true;
@@ -806,6 +807,18 @@ class TaskFragment extends WindowContainer<WindowContainer> {
final boolean hasRunningActivities = hasRunningActivity(other);
if (other == this) {
if (!adjacentTaskFragments.isEmpty() && !gotTranslucentAdjacent) {
// The z-order of this TaskFragment is in middle of two adjacent TaskFragments
// and it cannot be visible if the TaskFragment on top is not translucent and
// is fully occluding this one.
for (int j = adjacentTaskFragments.size() - 1; j >= 0; --j) {
final TaskFragment taskFragment = adjacentTaskFragments.get(j);
if (!taskFragment.isTranslucent(starting)
&& taskFragment.getBounds().contains(this.getBounds())) {
return TASK_FRAGMENT_VISIBILITY_INVISIBLE;
}
}
}
// Should be visible if there is no other fragment occluding it, unless it doesn't
// have any running activities, not starting one and not home stack.
shouldBeVisible = hasRunningActivities
@@ -875,6 +888,7 @@ class TaskFragment extends WindowContainer<WindowContainer> {
|| otherTaskFrag.mAdjacentTaskFragment.isTranslucent(starting)) {
// Can be visible behind a translucent adjacent TaskFragments.
gotTranslucentFullscreen = true;
gotTranslucentAdjacent = true;
continue;
}
// Can not be visible behind adjacent TaskFragments.