#include "config.h"
#include "CanvasBase.h"
#include "CSSCanvasValue.h"
#include "CanvasRenderingContext.h"
#include "Element.h"
#include "FloatRect.h"
#include "InspectorInstrumentation.h"
namespace WebCore {
CanvasBase::CanvasBase(ScriptExecutionContext* scriptExecutionContext)
: m_scriptExecutionContext(scriptExecutionContext)
{
}
CanvasBase::~CanvasBase()
{
notifyObserversCanvasDestroyed();
}
CanvasRenderingContext* CanvasBase::renderingContext() const
{
return m_context.get();
}
void CanvasBase::addObserver(CanvasObserver& observer)
{
m_observers.add(&observer);
if (is<CSSCanvasValue::CanvasObserverProxy>(observer))
InspectorInstrumentation::didChangeCSSCanvasClientNodes(*this);
}
void CanvasBase::removeObserver(CanvasObserver& observer)
{
m_observers.remove(&observer);
if (is<CSSCanvasValue::CanvasObserverProxy>(observer))
InspectorInstrumentation::didChangeCSSCanvasClientNodes(*this);
}
void CanvasBase::notifyObserversCanvasChanged(const FloatRect& rect)
{
for (auto& observer : m_observers)
observer->canvasChanged(*this, rect);
}
void CanvasBase::notifyObserversCanvasResized()
{
for (auto& observer : m_observers)
observer->canvasResized(*this);
}
void CanvasBase::notifyObserversCanvasDestroyed()
{
for (auto& observer : m_observers)
observer->canvasDestroyed(*this);
m_observers.clear();
}
HashSet<Element*> CanvasBase::cssCanvasClients() const
{
HashSet<Element*> cssCanvasClients;
for (auto& observer : m_observers) {
if (!is<CSSCanvasValue::CanvasObserverProxy>(observer))
continue;
auto clients = downcast<CSSCanvasValue::CanvasObserverProxy>(observer)->ownerValue().clients();
for (auto& entry : clients) {
if (RefPtr<Element> element = entry.key->element())
cssCanvasClients.add(element.get());
}
}
return cssCanvasClients;
}
}