void ScrollbarThemeAura::paintTrackBackground(GraphicsContext& context,
const Scrollbar& scrollbar,
const IntRect& rect) {
// Just assume a forward track part. We only paint the track as a single piece
// when there is no thumb.
if (!hasThumb(scrollbar) && !rect.isEmpty())
paintTrackPiece(context, scrollbar, rect, ForwardTrackPart);
}
void ScrollbarThemeChromium::paintTrackBackground(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect)
{
// Just assume a forward track part. We only paint the track as a single piece when there is no thumb.
if (!hasThumb(scrollbar))
paintTrackPiece(context, scrollbar, rect, ForwardTrackPart);
}
bool ScrollbarThemeComposite::paint(ScrollbarThemeClient* scrollbar, GraphicsContext* graphicsContext, const IntRect& damageRect)
{
// Create the ScrollbarControlPartMask based on the damageRect
ScrollbarControlPartMask scrollMask = NoPart;
IntRect backButtonStartPaintRect;
IntRect backButtonEndPaintRect;
IntRect forwardButtonStartPaintRect;
IntRect forwardButtonEndPaintRect;
if (hasButtons(scrollbar)) {
backButtonStartPaintRect = backButtonRect(scrollbar, BackButtonStartPart, true);
if (damageRect.intersects(backButtonStartPaintRect))
scrollMask |= BackButtonStartPart;
backButtonEndPaintRect = backButtonRect(scrollbar, BackButtonEndPart, true);
if (damageRect.intersects(backButtonEndPaintRect))
scrollMask |= BackButtonEndPart;
forwardButtonStartPaintRect = forwardButtonRect(scrollbar, ForwardButtonStartPart, true);
if (damageRect.intersects(forwardButtonStartPaintRect))
scrollMask |= ForwardButtonStartPart;
forwardButtonEndPaintRect = forwardButtonRect(scrollbar, ForwardButtonEndPart, true);
if (damageRect.intersects(forwardButtonEndPaintRect))
scrollMask |= ForwardButtonEndPart;
}
IntRect startTrackRect;
IntRect thumbRect;
IntRect endTrackRect;
IntRect trackPaintRect = trackRect(scrollbar, true);
if (damageRect.intersects(trackPaintRect))
scrollMask |= TrackBGPart;
bool thumbPresent = hasThumb(scrollbar);
if (thumbPresent) {
IntRect track = trackRect(scrollbar);
splitTrack(scrollbar, track, startTrackRect, thumbRect, endTrackRect);
if (damageRect.intersects(thumbRect))
scrollMask |= ThumbPart;
if (damageRect.intersects(startTrackRect))
scrollMask |= BackTrackPart;
if (damageRect.intersects(endTrackRect))
scrollMask |= ForwardTrackPart;
}
// Paint the scrollbar background (only used by custom CSS scrollbars).
paintScrollbarBackground(graphicsContext, scrollbar);
// Paint the back and forward buttons.
if (scrollMask & BackButtonStartPart)
paintButton(graphicsContext, scrollbar, backButtonStartPaintRect, BackButtonStartPart);
if (scrollMask & BackButtonEndPart)
paintButton(graphicsContext, scrollbar, backButtonEndPaintRect, BackButtonEndPart);
if (scrollMask & ForwardButtonStartPart)
paintButton(graphicsContext, scrollbar, forwardButtonStartPaintRect, ForwardButtonStartPart);
if (scrollMask & ForwardButtonEndPart)
paintButton(graphicsContext, scrollbar, forwardButtonEndPaintRect, ForwardButtonEndPart);
if (scrollMask & TrackBGPart)
paintTrackBackground(graphicsContext, scrollbar, trackPaintRect);
if ((scrollMask & ForwardTrackPart) || (scrollMask & BackTrackPart)) {
// Paint the track pieces above and below the thumb.
if (scrollMask & BackTrackPart)
paintTrackPiece(graphicsContext, scrollbar, startTrackRect, BackTrackPart);
if (scrollMask & ForwardTrackPart)
paintTrackPiece(graphicsContext, scrollbar, endTrackRect, ForwardTrackPart);
paintTickmarks(graphicsContext, scrollbar, trackPaintRect);
}
// Paint the thumb.
if (scrollMask & ThumbPart)
paintThumb(graphicsContext, scrollbar, thumbRect);
return true;
}
bool ScrollbarThemeComposite::paint(Scrollbar* scrollbar, GraphicsContext* graphicsContext, const IntRect& damageRect)
{
// Create the ScrollbarControlPartMask based on the damageRect
ScrollbarControlPartMask scrollMask = NoPart;
IntRect backButtonStartPaintRect;
IntRect backButtonEndPaintRect;
IntRect forwardButtonStartPaintRect;
IntRect forwardButtonEndPaintRect;
if (hasButtons(scrollbar)) {
backButtonStartPaintRect = backButtonRect(scrollbar, BackButtonStartPart, true);
if (damageRect.intersects(backButtonStartPaintRect))
scrollMask |= BackButtonStartPart;
backButtonEndPaintRect = backButtonRect(scrollbar, BackButtonEndPart, true);
if (damageRect.intersects(backButtonEndPaintRect))
scrollMask |= BackButtonEndPart;
forwardButtonStartPaintRect = forwardButtonRect(scrollbar, ForwardButtonStartPart, true);
if (damageRect.intersects(forwardButtonStartPaintRect))
scrollMask |= ForwardButtonStartPart;
forwardButtonEndPaintRect = forwardButtonRect(scrollbar, ForwardButtonEndPart, true);
if (damageRect.intersects(forwardButtonEndPaintRect))
scrollMask |= ForwardButtonEndPart;
}
IntRect startTrackRect;
IntRect thumbRect;
IntRect endTrackRect;
IntRect trackPaintRect = trackRect(scrollbar, true);
if (damageRect.intersects(trackPaintRect))
scrollMask |= TrackBGPart;
bool thumbPresent = hasThumb(scrollbar);
if (thumbPresent) {
IntRect track = trackRect(scrollbar);
splitTrack(scrollbar, track, startTrackRect, thumbRect, endTrackRect);
if (damageRect.intersects(thumbRect))
scrollMask |= ThumbPart;
if (damageRect.intersects(startTrackRect))
scrollMask |= BackTrackPart;
if (damageRect.intersects(endTrackRect))
scrollMask |= ForwardTrackPart;
}
#if PLATFORM(WIN)
// FIXME: This API makes the assumption that the custom scrollbar's metrics will match
// the theme's metrics. This is not a valid assumption. The ability for a client to paint
// custom scrollbars should be removed once scrollbars can be styled via CSS.
if (Page* page = pageForScrollView(scrollbar->parent())) {
if (page->settings()->shouldPaintCustomScrollbars()) {
float proportion = static_cast<float>(scrollbar->visibleSize()) / scrollbar->totalSize();
float value = scrollbar->currentPos() / static_cast<float>(scrollbar->maximum());
ScrollbarControlState s = 0;
if (scrollbar->client()->isActive())
s |= ActiveScrollbarState;
if (scrollbar->enabled())
s |= EnabledScrollbarState;
if (scrollbar->pressedPart() != NoPart)
s |= PressedScrollbarState;
if (page->chrome()->client()->paintCustomScrollbar(graphicsContext,
scrollbar->frameRect(),
scrollbar->controlSize(),
s,
scrollbar->pressedPart(),
scrollbar->orientation() == VerticalScrollbar,
value,
proportion,
scrollMask))
return true;
}
}
#endif
// Paint the scrollbar background (only used by custom CSS scrollbars).
paintScrollbarBackground(graphicsContext, scrollbar);
// Paint the back and forward buttons.
if (scrollMask & BackButtonStartPart)
paintButton(graphicsContext, scrollbar, backButtonStartPaintRect, BackButtonStartPart);
if (scrollMask & BackButtonEndPart)
paintButton(graphicsContext, scrollbar, backButtonEndPaintRect, BackButtonEndPart);
if (scrollMask & ForwardButtonStartPart)
paintButton(graphicsContext, scrollbar, forwardButtonStartPaintRect, ForwardButtonStartPart);
if (scrollMask & ForwardButtonEndPart)
paintButton(graphicsContext, scrollbar, forwardButtonEndPaintRect, ForwardButtonEndPart);
if (scrollMask & TrackBGPart)
paintTrackBackground(graphicsContext, scrollbar, trackPaintRect);
if ((scrollMask & ForwardTrackPart) || (scrollMask & BackTrackPart)) {
// Paint the track pieces above and below the thumb.
if (scrollMask & BackTrackPart)
paintTrackPiece(graphicsContext, scrollbar, startTrackRect, BackTrackPart);
if (scrollMask & ForwardTrackPart)
paintTrackPiece(graphicsContext, scrollbar, endTrackRect, ForwardTrackPart);
paintTickmarks(graphicsContext, scrollbar, trackPaintRect);
}
// Paint the thumb.
if (scrollMask & ThumbPart)
paintThumb(graphicsContext, scrollbar, thumbRect);
return true;
}