This source file includes following definitions.
- m_useSolidColor
- m_useSolidColor
- scrollbarThickness
- usesOverlayScrollbars
- thumbPosition
- thumbLength
- hasThumb
- backButtonRect
- forwardButtonRect
- trackRect
- thumbThickness
- paintThumb
- hitTest
#include "config.h"
#include "platform/scroll/ScrollbarThemeOverlay.h"
#include "platform/PlatformMouseEvent.h"
#include "platform/graphics/GraphicsContext.h"
#include "platform/scroll/ScrollbarThemeClient.h"
#include "platform/transforms/TransformationMatrix.h"
#include "public/platform/Platform.h"
#include "public/platform/WebRect.h"
#include "public/platform/WebThemeEngine.h"
#include <algorithm>
using namespace std;
namespace WebCore {
ScrollbarThemeOverlay::ScrollbarThemeOverlay(int thumbThickness, int scrollbarMargin, HitTestBehavior allowHitTest, Color color)
: ScrollbarTheme()
, m_thumbThickness(thumbThickness)
, m_scrollbarMargin(scrollbarMargin)
, m_allowHitTest(allowHitTest)
, m_color(color)
, m_useSolidColor(true)
{
}
ScrollbarThemeOverlay::ScrollbarThemeOverlay(int thumbThickness, int scrollbarMargin, HitTestBehavior allowHitTest)
: ScrollbarTheme()
, m_thumbThickness(thumbThickness)
, m_scrollbarMargin(scrollbarMargin)
, m_allowHitTest(allowHitTest)
, m_useSolidColor(false)
{
}
int ScrollbarThemeOverlay::scrollbarThickness(ScrollbarControlSize controlSize)
{
return m_thumbThickness + m_scrollbarMargin;
}
bool ScrollbarThemeOverlay::usesOverlayScrollbars() const
{
return true;
}
int ScrollbarThemeOverlay::thumbPosition(ScrollbarThemeClient* scrollbar)
{
if (!scrollbar->totalSize())
return 0;
int trackLen = trackLength(scrollbar);
float proportion = static_cast<float>(scrollbar->currentPos()) / scrollbar->totalSize();
return round(proportion * trackLen);
}
int ScrollbarThemeOverlay::thumbLength(ScrollbarThemeClient* scrollbar)
{
int trackLen = trackLength(scrollbar);
if (!scrollbar->totalSize())
return trackLen;
float proportion = static_cast<float>(scrollbar->visibleSize()) / scrollbar->totalSize();
int length = round(proportion * trackLen);
length = min(max(length, minimumThumbLength(scrollbar)), trackLen);
return length;
}
bool ScrollbarThemeOverlay::hasThumb(ScrollbarThemeClient* scrollbar)
{
return true;
}
IntRect ScrollbarThemeOverlay::backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool)
{
return IntRect();
}
IntRect ScrollbarThemeOverlay::forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool)
{
return IntRect();
}
IntRect ScrollbarThemeOverlay::trackRect(ScrollbarThemeClient* scrollbar, bool)
{
IntRect rect = scrollbar->frameRect();
if (scrollbar->orientation() == HorizontalScrollbar)
rect.inflateX(-m_scrollbarMargin);
else
rect.inflateY(-m_scrollbarMargin);
return rect;
}
int ScrollbarThemeOverlay::thumbThickness(ScrollbarThemeClient*)
{
return m_thumbThickness;
}
void ScrollbarThemeOverlay::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
{
IntRect thumbRect = rect;
if (scrollbar->orientation() == HorizontalScrollbar) {
thumbRect.setHeight(thumbRect.height() - m_scrollbarMargin);
} else {
thumbRect.setWidth(thumbRect.width() - m_scrollbarMargin);
if (scrollbar->isLeftSideVerticalScrollbar())
thumbRect.setX(thumbRect.x() + m_scrollbarMargin);
}
if (m_useSolidColor) {
context->fillRect(thumbRect, m_color);
return;
}
blink::WebThemeEngine::State state = blink::WebThemeEngine::StateNormal;
if (scrollbar->pressedPart() == ThumbPart)
state = blink::WebThemeEngine::StatePressed;
else if (scrollbar->hoveredPart() == ThumbPart)
state = blink::WebThemeEngine::StateHover;
blink::WebCanvas* canvas = context->canvas();
blink::WebThemeEngine::Part part = blink::WebThemeEngine::PartScrollbarHorizontalThumb;
if (scrollbar->orientation() == VerticalScrollbar)
part = blink::WebThemeEngine::PartScrollbarVerticalThumb;
blink::Platform::current()->themeEngine()->paint(canvas, part, state, blink::WebRect(rect), 0);
}
ScrollbarPart ScrollbarThemeOverlay::hitTest(ScrollbarThemeClient* scrollbar, const IntPoint& position)
{
if (m_allowHitTest == DisallowHitTest)
return NoPart;
return ScrollbarTheme::hitTest(scrollbar, position);
}
}