DebugPageOverlays.h [plain text]
#ifndef DebugPageOverlays_h
#define DebugPageOverlays_h
#include "Frame.h"
#include "Settings.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WebCore {
class MainFrame;
class RegionOverlay;
class DebugPageOverlays {
public:
static DebugPageOverlays& singleton();
enum class RegionType {
WheelEventHandlers,
NonFastScrollableRegion,
};
static const unsigned NumberOfRegionTypes = NonFastScrollableRegion + 1;
static void didLayout(Frame&);
static void didChangeEventHandlers(Frame&);
WEBCORE_EXPORT static void settingsChanged(MainFrame&);
private:
static bool hasOverlays(MainFrame&);
void showRegionOverlay(MainFrame&, RegionType);
void hideRegionOverlay(MainFrame&, RegionType);
void regionChanged(Frame&, RegionType);
bool hasOverlaysForFrame(MainFrame& frame) const
{
return m_frameRegionOverlays.contains(&frame);
}
void updateOverlayRegionVisibility(MainFrame&, DebugOverlayRegions);
RegionOverlay* regionOverlayForFrame(MainFrame&, RegionType) const;
RegionOverlay& ensureRegionOverlayForFrame(MainFrame&, RegionType);
HashMap<MainFrame*, Vector<RefPtr<RegionOverlay>>> m_frameRegionOverlays;
static DebugPageOverlays* sharedDebugOverlays;
};
#define FAST_RETURN_IF_NO_OVERLAYS(frame) if (LIKELY(!hasOverlays(frame))) return;
inline bool DebugPageOverlays::hasOverlays(MainFrame& frame)
{
if (!sharedDebugOverlays)
return false;
return sharedDebugOverlays->hasOverlaysForFrame(frame);
}
inline void DebugPageOverlays::didLayout(Frame& frame)
{
FAST_RETURN_IF_NO_OVERLAYS(frame.mainFrame());
sharedDebugOverlays->regionChanged(frame, RegionType::WheelEventHandlers);
sharedDebugOverlays->regionChanged(frame, RegionType::NonFastScrollableRegion);
}
inline void DebugPageOverlays::didChangeEventHandlers(Frame& frame)
{
FAST_RETURN_IF_NO_OVERLAYS(frame.mainFrame());
sharedDebugOverlays->regionChanged(frame, RegionType::WheelEventHandlers);
sharedDebugOverlays->regionChanged(frame, RegionType::NonFastScrollableRegion);
}
}
#endif