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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/html/canvas/HitRegion.h"
#include "core/dom/AXObjectCache.h"
#include "core/rendering/RenderBoxModelObject.h"
namespace blink {
HitRegion::HitRegion(const Path& path, const HitRegionOptions& options)
: m_id(options.id())
, m_control(options.control())
, m_path(path)
{
if (options.fillRule() != "evenodd")
m_fillRule = RULE_NONZERO;
else
m_fillRule = RULE_EVENODD;
}
void HitRegion::updateAccessibility(Element* canvas)
{
if (!m_control || !canvas || !canvas->renderer() || !m_control->isDescendantOf(canvas))
return;
AXObjectCache* axObjectCache = m_control->document().existingAXObjectCache();
if (!axObjectCache)
return;
FloatRect boundingRect = m_path.boundingRect();
// Offset by the canvas rect, taking border and padding into account.
RenderBoxModelObject* rbmo = canvas->renderBoxModelObject();
IntRect canvasRect = canvas->renderer()->absoluteBoundingBoxRect();
canvasRect.move(rbmo->borderLeft() + rbmo->paddingLeft(),
rbmo->borderTop() + rbmo->paddingTop());
LayoutRect elementRect = enclosingLayoutRect(boundingRect);
elementRect.moveBy(canvasRect.location());
axObjectCache->setCanvasObjectBounds(m_control.get(), elementRect);
}
bool HitRegion::contains(const LayoutPoint& point) const
{
return m_path.contains(FloatPoint(point), m_fillRule);
}
bool HitRegion::contains(const FloatPoint& point) const
{
return m_path.contains(point, m_fillRule);
}
void HitRegion::removePixels(const Path& clearArea)
{
m_path.subtractPath(clearArea);
}
void HitRegion::trace(Visitor* visitor)
{
visitor->trace(m_control);
}
void HitRegionManager::addHitRegion(PassRefPtrWillBeRawPtr<HitRegion> passHitRegion)
{
RefPtrWillBeRawPtr<HitRegion> hitRegion = passHitRegion;
m_hitRegionList.add(hitRegion);
if (!hitRegion->id().isEmpty())
m_hitRegionIdMap.set(hitRegion->id(), hitRegion);
if (hitRegion->control())
m_hitRegionControlMap.set(hitRegion->control(), hitRegion);
}
void HitRegionManager::removeHitRegion(HitRegion* hitRegion)
{
if (!hitRegion)
return;
if (!hitRegion->id().isEmpty())
m_hitRegionIdMap.remove(hitRegion->id());
if (hitRegion->control())
m_hitRegionControlMap.remove(hitRegion->control());
m_hitRegionList.remove(hitRegion);
}
void HitRegionManager::removeHitRegionById(const String& id)
{
if (!id.isEmpty())
removeHitRegion(getHitRegionById(id));
}
void HitRegionManager::removeHitRegionByControl(Element* control)
{
removeHitRegion(getHitRegionByControl(control));
}
void HitRegionManager::removeHitRegionsInRect(const FloatRect& rect, const AffineTransform& ctm)
{
Path clearArea;
clearArea.addRect(rect);
clearArea.transform(ctm);
HitRegionIterator itEnd = m_hitRegionList.rend();
HitRegionList toBeRemoved;
for (HitRegionIterator it = m_hitRegionList.rbegin(); it != itEnd; ++it) {
RefPtrWillBeRawPtr<HitRegion> hitRegion = *it;
hitRegion->removePixels(clearArea);
if (hitRegion->path().isEmpty())
toBeRemoved.add(hitRegion);
}
itEnd = toBeRemoved.rend();
for (HitRegionIterator it = toBeRemoved.rbegin(); it != itEnd; ++it)
removeHitRegion(it->get());
}
void HitRegionManager::removeAllHitRegions()
{
m_hitRegionList.clear();
m_hitRegionIdMap.clear();
m_hitRegionControlMap.clear();
}
HitRegion* HitRegionManager::getHitRegionById(const String& id) const
{
return m_hitRegionIdMap.get(id);
}
HitRegion* HitRegionManager::getHitRegionByControl(Element* control) const
{
if (control)
return m_hitRegionControlMap.get(control);
return nullptr;
}
HitRegion* HitRegionManager::getHitRegionAtPoint(const LayoutPoint& point) const
{
HitRegionIterator itEnd = m_hitRegionList.rend();
for (HitRegionIterator it = m_hitRegionList.rbegin(); it != itEnd; ++it) {
RefPtrWillBeRawPtr<HitRegion> hitRegion = *it;
if (hitRegion->contains(point))
return hitRegion.get();
}
return nullptr;
}
unsigned HitRegionManager::getHitRegionsCount() const
{
return m_hitRegionList.size();
}
void HitRegionManager::trace(Visitor* visitor)
{
#if ENABLE(OILPAN)
visitor->trace(m_hitRegionList);
visitor->trace(m_hitRegionIdMap);
visitor->trace(m_hitRegionControlMap);
#endif
}
DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(HitRegionManager)
} // namespace blink
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