DebugPageOverlays.h [plain text]
#pragma once
#include "Frame.h"
#include "Settings.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WebCore {
class Page;
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(Page&);
private:
static bool hasOverlays(Page&);
void showRegionOverlay(Page&, RegionType);
void hideRegionOverlay(Page&, RegionType);
void regionChanged(Frame&, RegionType);
bool hasOverlaysForPage(Page& page) const
{
return m_pageRegionOverlays.contains(&page);
}
void updateOverlayRegionVisibility(Page&, DebugOverlayRegions);
RegionOverlay* regionOverlayForPage(Page&, RegionType) const;
RegionOverlay& ensureRegionOverlayForPage(Page&, RegionType);
HashMap<Page*, Vector<RefPtr<RegionOverlay>>> m_pageRegionOverlays;
static DebugPageOverlays* sharedDebugOverlays;
};
#define FAST_RETURN_IF_NO_OVERLAYS(page) if (LIKELY(!page || !hasOverlays(*page))) return;
inline bool DebugPageOverlays::hasOverlays(Page& page)
{
if (!sharedDebugOverlays)
return false;
return sharedDebugOverlays->hasOverlaysForPage(page);
}
inline void DebugPageOverlays::didLayout(Frame& frame)
{
FAST_RETURN_IF_NO_OVERLAYS(frame.page());
sharedDebugOverlays->regionChanged(frame, RegionType::WheelEventHandlers);
sharedDebugOverlays->regionChanged(frame, RegionType::NonFastScrollableRegion);
}
inline void DebugPageOverlays::didChangeEventHandlers(Frame& frame)
{
FAST_RETURN_IF_NO_OVERLAYS(frame.page());
sharedDebugOverlays->regionChanged(frame, RegionType::WheelEventHandlers);
sharedDebugOverlays->regionChanged(frame, RegionType::NonFastScrollableRegion);
}
}