TEST_F(ScrollableAreaTest, InvalidatesNonCompositedScrollbarsWhenThumbMoves)
{
ScrollbarThemeWithMockInvalidation theme;
OwnPtrWillBeRawPtr<MockScrollableArea> scrollableArea = MockScrollableArea::create(IntPoint(100, 100));
RefPtrWillBeRawPtr<Scrollbar> horizontalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), HorizontalScrollbar, RegularScrollbar, &theme);
RefPtrWillBeRawPtr<Scrollbar> verticalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), VerticalScrollbar, RegularScrollbar, &theme);
EXPECT_CALL(*scrollableArea, horizontalScrollbar()).WillRepeatedly(Return(horizontalScrollbar.get()));
EXPECT_CALL(*scrollableArea, verticalScrollbar()).WillRepeatedly(Return(verticalScrollbar.get()));
// Regardless of whether the theme invalidates any parts, non-composited
// scrollbars have to be repainted if the thumb moves.
EXPECT_CALL(*scrollableArea, layerForHorizontalScrollbar()).WillRepeatedly(Return(nullptr));
EXPECT_CALL(*scrollableArea, layerForVerticalScrollbar()).WillRepeatedly(Return(nullptr));
ASSERT_FALSE(scrollableArea->hasLayerForVerticalScrollbar());
ASSERT_FALSE(scrollableArea->hasLayerForHorizontalScrollbar());
EXPECT_CALL(theme, shouldRepaintAllPartsOnInvalidation()).WillRepeatedly(Return(false));
EXPECT_CALL(theme, invalidateOnThumbPositionChange(_, _, _)).WillRepeatedly(Return(NoPart));
// A scroll in each direction should only invalidate one scrollbar.
scrollableArea->setScrollPosition(DoublePoint(0, 50), ProgrammaticScroll);
EXPECT_FALSE(scrollableArea->horizontalScrollbarNeedsPaintInvalidation());
EXPECT_TRUE(scrollableArea->verticalScrollbarNeedsPaintInvalidation());
scrollableArea->clearNeedsPaintInvalidationForScrollControls();
scrollableArea->setScrollPosition(DoublePoint(50, 50), ProgrammaticScroll);
EXPECT_TRUE(scrollableArea->horizontalScrollbarNeedsPaintInvalidation());
EXPECT_FALSE(scrollableArea->verticalScrollbarNeedsPaintInvalidation());
scrollableArea->clearNeedsPaintInvalidationForScrollControls();
// Forced GC in order to finalize objects depending on the mock object.
Heap::collectAllGarbage();
}
TEST_F(ScrollableAreaTest, InvalidatesCompositedScrollbarsIfPartsNeedRepaint)
{
ScrollbarThemeWithMockInvalidation theme;
OwnPtrWillBeRawPtr<MockScrollableArea> scrollableArea = MockScrollableArea::create(IntPoint(100, 100));
RefPtrWillBeRawPtr<Scrollbar> horizontalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), HorizontalScrollbar, RegularScrollbar, &theme);
horizontalScrollbar->clearTrackNeedsRepaint();
horizontalScrollbar->clearThumbNeedsRepaint();
RefPtrWillBeRawPtr<Scrollbar> verticalScrollbar = Scrollbar::createForTesting(scrollableArea.get(), VerticalScrollbar, RegularScrollbar, &theme);
verticalScrollbar->clearTrackNeedsRepaint();
verticalScrollbar->clearThumbNeedsRepaint();
EXPECT_CALL(*scrollableArea, horizontalScrollbar()).WillRepeatedly(Return(horizontalScrollbar.get()));
EXPECT_CALL(*scrollableArea, verticalScrollbar()).WillRepeatedly(Return(verticalScrollbar.get()));
// Composited scrollbars only need repainting when parts become invalid
// (e.g. if the track changes appearance when the thumb reaches the end).
MockGraphicsLayerClient graphicsLayerClient;
MockGraphicsLayer layerForHorizontalScrollbar(&graphicsLayerClient);
layerForHorizontalScrollbar.setDrawsContent(true);
layerForHorizontalScrollbar.setSize(FloatSize(10, 10));
MockGraphicsLayer layerForVerticalScrollbar(&graphicsLayerClient);
layerForVerticalScrollbar.setDrawsContent(true);
layerForVerticalScrollbar.setSize(FloatSize(10, 10));
EXPECT_CALL(*scrollableArea, layerForHorizontalScrollbar()).WillRepeatedly(Return(&layerForHorizontalScrollbar));
EXPECT_CALL(*scrollableArea, layerForVerticalScrollbar()).WillRepeatedly(Return(&layerForVerticalScrollbar));
ASSERT_TRUE(scrollableArea->hasLayerForHorizontalScrollbar());
ASSERT_TRUE(scrollableArea->hasLayerForVerticalScrollbar());
EXPECT_CALL(theme, shouldRepaintAllPartsOnInvalidation()).WillRepeatedly(Return(false));
// First, we'll scroll horizontally, and the theme will require repainting
// the back button (i.e. the track).
EXPECT_CALL(theme, invalidateOnThumbPositionChange(_, _, _)).WillOnce(Return(BackButtonStartPart));
scrollableArea->setScrollPosition(DoublePoint(50, 0), ProgrammaticScroll);
EXPECT_TRUE(layerForHorizontalScrollbar.hasTrackedPaintInvalidations());
EXPECT_FALSE(layerForVerticalScrollbar.hasTrackedPaintInvalidations());
EXPECT_TRUE(horizontalScrollbar->trackNeedsRepaint());
EXPECT_FALSE(horizontalScrollbar->thumbNeedsRepaint());
layerForHorizontalScrollbar.resetTrackedPaintInvalidations();
horizontalScrollbar->clearTrackNeedsRepaint();
// Next, we'll scroll vertically, but invalidate the thumb.
EXPECT_CALL(theme, invalidateOnThumbPositionChange(_, _, _)).WillOnce(Return(ThumbPart));
scrollableArea->setScrollPosition(DoublePoint(50, 50), ProgrammaticScroll);
EXPECT_FALSE(layerForHorizontalScrollbar.hasTrackedPaintInvalidations());
EXPECT_TRUE(layerForVerticalScrollbar.hasTrackedPaintInvalidations());
EXPECT_FALSE(verticalScrollbar->trackNeedsRepaint());
EXPECT_TRUE(verticalScrollbar->thumbNeedsRepaint());
layerForVerticalScrollbar.resetTrackedPaintInvalidations();
verticalScrollbar->clearThumbNeedsRepaint();
// Next we'll scroll in both, but the thumb position moving requires no
// invalidations. Nonetheless the GraphicsLayer should be invalidated,
// because we still need to update the underlying layer (though no
// rasterization will be required).
EXPECT_CALL(theme, invalidateOnThumbPositionChange(_, _, _)).Times(2).WillRepeatedly(Return(NoPart));
scrollableArea->setScrollPosition(DoublePoint(70, 70), ProgrammaticScroll);
EXPECT_TRUE(layerForHorizontalScrollbar.hasTrackedPaintInvalidations());
EXPECT_TRUE(layerForVerticalScrollbar.hasTrackedPaintInvalidations());
EXPECT_FALSE(horizontalScrollbar->trackNeedsRepaint());
EXPECT_FALSE(horizontalScrollbar->thumbNeedsRepaint());
EXPECT_FALSE(verticalScrollbar->trackNeedsRepaint());
EXPECT_FALSE(verticalScrollbar->thumbNeedsRepaint());
// Forced GC in order to finalize objects depending on the mock object.
Heap::collectAllGarbage();
}