void ScrollbarTheme::splitTrack(const ScrollbarThemeClient& scrollbar,
const IntRect& unconstrainedTrackRect,
IntRect& beforeThumbRect,
IntRect& thumbRect,
IntRect& afterThumbRect) {
// This function won't even get called unless we're big enough to have some
// combination of these three rects where at least one of them is non-empty.
IntRect trackRect =
constrainTrackRectToTrackPieces(scrollbar, unconstrainedTrackRect);
int thumbPos = thumbPosition(scrollbar);
if (scrollbar.orientation() == HorizontalScrollbar) {
thumbRect = IntRect(trackRect.x() + thumbPos, trackRect.y(),
thumbLength(scrollbar), scrollbar.height());
beforeThumbRect =
IntRect(trackRect.x(), trackRect.y(), thumbPos + thumbRect.width() / 2,
trackRect.height());
afterThumbRect =
IntRect(trackRect.x() + beforeThumbRect.width(), trackRect.y(),
trackRect.maxX() - beforeThumbRect.maxX(), trackRect.height());
} else {
thumbRect = IntRect(trackRect.x(), trackRect.y() + thumbPos,
scrollbar.width(), thumbLength(scrollbar));
beforeThumbRect = IntRect(trackRect.x(), trackRect.y(), trackRect.width(),
thumbPos + thumbRect.height() / 2);
afterThumbRect =
IntRect(trackRect.x(), trackRect.y() + beforeThumbRect.height(),
trackRect.width(), trackRect.maxY() - beforeThumbRect.maxY());
}
}
int ScrollbarTheme::trackLength(const ScrollbarThemeClient& scrollbar) {
IntRect constrainedTrackRect =
constrainTrackRectToTrackPieces(scrollbar, trackRect(scrollbar));
return (scrollbar.orientation() == HorizontalScrollbar)
? constrainedTrackRect.width()
: constrainedTrackRect.height();
}
int ScrollbarTheme::trackPosition(const ScrollbarThemeClient& scrollbar) {
IntRect constrainedTrackRect =
constrainTrackRectToTrackPieces(scrollbar, trackRect(scrollbar));
return (scrollbar.orientation() == HorizontalScrollbar)
? constrainedTrackRect.x() - scrollbar.x()
: constrainedTrackRect.y() - scrollbar.y();
}
IntRect ScrollbarThemeGtk::thumbRect(ScrollbarThemeClient* scrollbar, const IntRect& unconstrainedTrackRect)
{
IntRect trackRect = constrainTrackRectToTrackPieces(scrollbar, unconstrainedTrackRect);
int thumbPos = thumbPosition(scrollbar);
if (scrollbar->orientation() == HorizontalScrollbar)
return IntRect(trackRect.x() + thumbPos, trackRect.y() + (trackRect.height() - m_thumbFatness) / 2, thumbLength(scrollbar), m_thumbFatness);
// VerticalScrollbar
return IntRect(trackRect.x() + (trackRect.width() - m_thumbFatness) / 2, trackRect.y() + thumbPos, m_thumbFatness, thumbLength(scrollbar));
}
void ScrollbarThemeComposite::splitTrack(Scrollbar* scrollbar, const IntRect& unconstrainedTrackRect, IntRect& beforeThumbRect, IntRect& thumbRect, IntRect& afterThumbRect)
{
// This function won't even get called unless we're big enough to have some combination of these three rects where at least
// one of them is non-empty.
IntRect trackRect = constrainTrackRectToTrackPieces(scrollbar, unconstrainedTrackRect);
int thickness = scrollbar->orientation() == HorizontalScrollbar ? scrollbar->height() : scrollbar->width();
int thumbPos = thumbPosition(scrollbar);
if (scrollbar->orientation() == HorizontalScrollbar) {
thumbRect = IntRect(trackRect.x() + thumbPos, trackRect.y() + (trackRect.height() - thickness) / 2, thumbLength(scrollbar), thickness);
beforeThumbRect = IntRect(trackRect.x(), trackRect.y(), thumbPos + thumbRect.width() / 2, trackRect.height());
afterThumbRect = IntRect(trackRect.x() + beforeThumbRect.width(), trackRect.y(), trackRect.right() - beforeThumbRect.right(), trackRect.height());
} else {
thumbRect = IntRect(trackRect.x() + (trackRect.width() - thickness) / 2, trackRect.y() + thumbPos, thickness, thumbLength(scrollbar));
beforeThumbRect = IntRect(trackRect.x(), trackRect.y(), trackRect.width(), thumbPos + thumbRect.height() / 2);
afterThumbRect = IntRect(trackRect.x(), trackRect.y() + beforeThumbRect.height(), trackRect.width(), trackRect.bottom() - beforeThumbRect.bottom());
}
}
int ScrollbarThemeComposite::trackPosition(Scrollbar* scrollbar)
{
IntRect constrainedTrackRect = constrainTrackRectToTrackPieces(scrollbar, trackRect(scrollbar));
return (scrollbar->orientation() == HorizontalScrollbar) ? constrainedTrackRect.x() - scrollbar->x() : constrainedTrackRect.y() - scrollbar->y();
}