Snap to current page's relative position after dismissal. (0abfe4e7) · Commits · e / os / android_packages_apps_Trebuchet

quickstep/src/com/android/quickstep/views/RecentsView.java

+101 −34

Original line number	Diff line number	Diff line
		@@ -2807,14 +2807,49 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		resetTaskVisuals();

		int pageToSnapTo = mCurrentPage;
		if ((dismissedIndex < pageToSnapTo && !showAsGrid)
		\|\| pageToSnapTo == taskCount - 1) {
		pageToSnapTo -= 1;
		}
		int taskViewIdToSnapTo = -1;
		if (showAsGrid) {
		// Get the id of the task view we will snap to based on the current
		// page's relative position as the order of indices change over time due
		// to dismissals.
		TaskView snappedTaskView = getTaskViewAtByAbsoluteIndex(mCurrentPage);
		if (snappedTaskView != null) {
		if (snappedTaskView.getTaskViewId() == mFocusedTaskViewId) {
		if (finalNextFocusedTaskView != null) {
		taskViewIdToSnapTo = finalNextFocusedTaskView.getTaskViewId();
		} else {
		taskViewIdToSnapTo = mFocusedTaskViewId;
		}
		} else {
		int snappedTaskViewId = snappedTaskView.getTaskViewId();
		boolean isSnappedTaskInTopRow = mTopRowIdSet.contains(
		snappedTaskViewId);
		IntArray taskViewIdArray =
		isSnappedTaskInTopRow ? getTopRowIdArray()
		: getBottomRowIdArray();
		int snappedIndex = taskViewIdArray.indexOf(snappedTaskViewId);
		taskViewIdArray.removeValue(dismissedTaskViewId);
		if (snappedIndex < taskViewIdArray.size()) {
		taskViewIdToSnapTo = taskViewIdArray.get(snappedIndex);
		} else if (snappedIndex == taskViewIdArray.size()) {
		// If the snapped task is the last item from the dismissed row,
		// snap to the same column in the other grid row
		IntArray inverseRowTaskViewIdArray =
		isSnappedTaskInTopRow ? getBottomRowIdArray()
		: getTopRowIdArray();
		if (snappedIndex < inverseRowTaskViewIdArray.size()) {
		taskViewIdToSnapTo = inverseRowTaskViewIdArray.get(
		snappedIndex);
		}
		}
		}
		}

		int primaryScroll = mOrientationHandler.getPrimaryScroll(RecentsView.this);
		int currentPageScroll = getScrollForPage(pageToSnapTo);
		mCurrentPageScrollDiff = primaryScroll - currentPageScroll;
		} else if (dismissedIndex < pageToSnapTo \|\| pageToSnapTo == taskCount - 1) {
		pageToSnapTo -= 1;
		}
		removeViewInLayout(dismissedTaskView);
		mTopRowIdSet.remove(dismissedTaskViewId);
		@@ -2834,6 +2869,8 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		// Update scroll and snap to page.
		updateScrollSynchronously();

		if (showAsGrid) {
		// Rebalance tasks in the grid
		int highestVisibleTaskIndex = getHighestVisibleTaskIndex();
		if (highestVisibleTaskIndex < Integer.MAX_VALUE) {
		TaskView taskView = getTaskViewAt(highestVisibleTaskIndex);
		@@ -2842,9 +2879,8 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		int screenStart = mOrientationHandler.getPrimaryScroll(
		RecentsView.this);
		int taskStart = mOrientationHandler.getChildStart(taskView)
		+ (int) taskView.getOffsetAdjustment(
		/fullscreenEnabled=/ false,
		/gridEnabled=/ true);
		+ (int) taskView.getOffsetAdjustment(/fullscreenEnabled=/
		false, /gridEnabled=/ true);

		// Rebalance only if there is a maximum gap between the task and the
		// screen's edge; this ensures that rebalanced tasks are outside the
		@@ -2852,10 +2888,12 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		if (mIsRtl) {
		shouldRebalance = taskStart <= screenStart + mPageSpacing;
		} else {
		int screenEnd = screenStart + mOrientationHandler.getMeasuredSize(
		int screenEnd =
		screenStart + mOrientationHandler.getMeasuredSize(
		RecentsView.this);
		int taskSize = (int) (mOrientationHandler.getMeasuredSize(taskView)
		* taskView.getSizeAdjustment(/fullscreenEnabled=/ false));
		int taskSize = (int) (mOrientationHandler.getMeasuredSize(
		taskView) * taskView
		.getSizeAdjustment(/fullscreenEnabled=/false));
		int taskEnd = taskStart + taskSize;

		shouldRebalance = taskEnd >= screenEnd - mPageSpacing;
		@@ -2868,6 +2906,13 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		}
		}

		// If snapping to another page due to indices rearranging, find the new
		// index after dismissal & rearrange using the task view id.
		if (taskViewIdToSnapTo != -1) {
		pageToSnapTo = indexOfChild(
		getTaskViewFromTaskViewId(taskViewIdToSnapTo));
		}
		}
		setCurrentPage(pageToSnapTo);
		dispatchScrollChanged();
		}
		@@ -2879,11 +2924,33 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		return anim;
		}

		/**
		* Returns all the tasks in the top row, without the focused task
		*/
		private IntArray getTopRowIdArray() {
		if (mTopRowIdSet.isEmpty()) {
		return new IntArray(0);
		}
		IntArray topArray = new IntArray(mTopRowIdSet.size());
		int taskViewCount = getTaskViewCount();
		for (int i = 0; i < taskViewCount; i++) {
		int taskViewId = getTaskViewAt(i).getTaskViewId();
		if (mTopRowIdSet.contains(taskViewId)) {
		topArray.add(taskViewId);
		}
		}
		return topArray;
		}

		/**
		* Returns all the tasks in the bottom row, without the focused task
		*/
		private IntArray getBottomRowIdArray() {
		IntArray bottomArray = new IntArray();
		int bottomRowIdArraySize = getTaskViewCount() - mTopRowIdSet.size() - 1;
		if (bottomRowIdArraySize <= 0) {
		return new IntArray(0);
		}
		IntArray bottomArray = new IntArray(bottomRowIdArraySize);
		int taskViewCount = getTaskViewCount();
		for (int i = 0; i < taskViewCount; i++) {
		int taskViewId = getTaskViewAt(i).getTaskViewId();
		@@ -2904,7 +2971,7 @@ public abstract class RecentsView<ACTIVITY_TYPE extends StatefulActivity<STATE_T
		if (mTopRowIdSet.isEmpty()) return Integer.MAX_VALUE; // return earlier

		int lastVisibleIndex = Integer.MAX_VALUE;
		IntArray topRowIdArray = mTopRowIdSet.getArray();
		IntArray topRowIdArray = getTopRowIdArray();
		IntArray bottomRowIdArray = getBottomRowIdArray();
		int balancedColumns = Math.min(bottomRowIdArray.size(), topRowIdArray.size());