Use symmetric conditions for advertising and performing ACTION_SCROLL
am: 47be54bb78
Change-Id: Icdb68cd673269cbc2e41a44becbb0fa4c0ba4712
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@@ -1546,7 +1546,7 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
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switch (action) {
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case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD:
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case R.id.accessibilityActionScrollDown: {
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if (isEnabled() && getLastVisiblePosition() < getCount() - 1) {
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if (isEnabled() && canScrollDown()) {
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final int viewportHeight = getHeight() - mListPadding.top - mListPadding.bottom;
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smoothScrollBy(viewportHeight, PositionScroller.SCROLL_DURATION);
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return true;
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@@ -1554,7 +1554,7 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
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} return false;
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case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD:
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case R.id.accessibilityActionScrollUp: {
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if (isEnabled() && mFirstPosition > 0) {
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if (isEnabled() && canScrollUp()) {
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final int viewportHeight = getHeight() - mListPadding.top - mListPadding.bottom;
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smoothScrollBy(-viewportHeight, PositionScroller.SCROLL_DURATION);
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return true;
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