HitRegion::HitRegion(const Path& path, const HitRegionOptions& options)
: m_id(options.id().isEmpty() ? String() : options.id()),
m_control(options.control()),
m_path(path) {
if (options.fillRule() != "evenodd")
m_fillRule = RULE_NONZERO;
else
m_fillRule = RULE_EVENODD;
}
void CanvasRenderingContext2D::addHitRegion(const HitRegionOptions& options,
ExceptionState& exceptionState) {
if (options.id().isEmpty() && !options.control()) {
exceptionState.throwDOMException(NotSupportedError,
"Both id and control are null.");
return;
}
if (options.control() &&
!canvas()->isSupportedInteractiveCanvasFallback(*options.control())) {
exceptionState.throwDOMException(NotSupportedError,
"The control is neither null nor a "
"supported interactive canvas fallback "
"element.");
return;
}
Path hitRegionPath = options.hasPath() ? options.path()->path() : m_path;
SkCanvas* c = drawingCanvas();
if (hitRegionPath.isEmpty() || !c || !state().isTransformInvertible() ||
!c->getClipDeviceBounds(0)) {
exceptionState.throwDOMException(NotSupportedError,
"The specified path has no pixels.");
return;
}
hitRegionPath.transform(state().transform());
if (state().hasClip()) {
hitRegionPath.intersectPath(state().getCurrentClipPath());
if (hitRegionPath.isEmpty())
exceptionState.throwDOMException(NotSupportedError,
"The specified path has no pixels.");
}
if (!m_hitRegionManager)
m_hitRegionManager = HitRegionManager::create();
// Remove previous region (with id or control)
m_hitRegionManager->removeHitRegionById(options.id());
m_hitRegionManager->removeHitRegionByControl(options.control());
HitRegion* hitRegion = HitRegion::create(hitRegionPath, options);
Element* element = hitRegion->control();
if (element && element->isDescendantOf(canvas()))
updateElementAccessibility(hitRegion->path(), hitRegion->control());
m_hitRegionManager->addHitRegion(hitRegion);
}
