blob: d26fca6fb5036309863ac562c366159918fde73a [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2009, 2011 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "HTMLAreaElement.h"
#include "AffineTransform.h"
#include "ElementInlines.h"
#include "Frame.h"
#include "HTMLImageElement.h"
#include "HTMLMapElement.h"
#include "HTMLParserIdioms.h"
#include "HitTestResult.h"
#include "Path.h"
#include "RenderImage.h"
#include "RenderView.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLAreaElement);
using namespace HTMLNames;
inline HTMLAreaElement::HTMLAreaElement(const QualifiedName& tagName, Document& document)
: HTMLAnchorElement(tagName, document)
, m_lastSize(-1, -1)
, m_shape(Unknown)
{
ASSERT(hasTagName(areaTag));
}
Ref<HTMLAreaElement> HTMLAreaElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLAreaElement(tagName, document));
}
void HTMLAreaElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == shapeAttr) {
if (equalLettersIgnoringASCIICase(value, "default"_s))
m_shape = Default;
else if (equalLettersIgnoringASCIICase(value, "circle"_s) || equalLettersIgnoringASCIICase(value, "circ"_s))
m_shape = Circle;
else if (equalLettersIgnoringASCIICase(value, "poly"_s) || equalLettersIgnoringASCIICase(value, "polygon"_s))
m_shape = Poly;
else {
// The missing value default is the rectangle state.
m_shape = Rect;
}
invalidateCachedRegion();
} else if (name == coordsAttr) {
m_coords = parseHTMLListOfOfFloatingPointNumberValues(value.string());
invalidateCachedRegion();
} else if (name == altAttr) {
// Do nothing.
} else
HTMLAnchorElement::parseAttribute(name, value);
}
void HTMLAreaElement::invalidateCachedRegion()
{
m_lastSize = LayoutSize(-1, -1);
}
bool HTMLAreaElement::mapMouseEvent(LayoutPoint location, const LayoutSize& size, HitTestResult& result)
{
if (m_lastSize != size) {
m_region = makeUnique<Path>(getRegion(size));
m_lastSize = size;
}
if (!m_region->contains(location))
return false;
result.setInnerNode(this);
result.setURLElement(this);
return true;
}
// FIXME: We should use RenderElement* instead of RenderObject* once we upstream iOS's DOMUIKitExtensions.{h, mm}.
Path HTMLAreaElement::computePath(RenderObject* obj) const
{
if (!obj)
return Path();
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = obj->localToAbsolute();
// Default should default to the size of the containing object.
LayoutSize size = m_lastSize;
if (m_shape == Default)
size = obj->absoluteOutlineBounds().size();
Path p = getRegion(size);
float zoomFactor = obj->style().effectiveZoom();
if (zoomFactor != 1.0f) {
AffineTransform zoomTransform;
zoomTransform.scale(zoomFactor);
p.transform(zoomTransform);
}
p.translate(toFloatSize(absPos));
return p;
}
Path HTMLAreaElement::computePathForFocusRing(const LayoutSize& elementSize) const
{
return getRegion(m_shape == Default ? elementSize : m_lastSize);
}
// FIXME: Use RenderElement* instead of RenderObject* once we upstream iOS's DOMUIKitExtensions.{h, mm}.
LayoutRect HTMLAreaElement::computeRect(RenderObject* obj) const
{
return enclosingLayoutRect(computePath(obj).fastBoundingRect());
}
Path HTMLAreaElement::getRegion(const LayoutSize& size) const
{
if (m_coords.isEmpty() && m_shape != Default)
return Path();
LayoutUnit width = size.width();
LayoutUnit height = size.height();
// If element omits the shape attribute, select shape based on number of coordinates.
Shape shape = m_shape;
if (shape == Unknown) {
if (m_coords.size() == 3)
shape = Circle;
else if (m_coords.size() == 4)
shape = Rect;
else if (m_coords.size() >= 6)
shape = Poly;
}
Path path;
switch (shape) {
case Poly:
if (m_coords.size() >= 6) {
int numPoints = m_coords.size() / 2;
path.moveTo(FloatPoint(m_coords[0], m_coords[1]));
for (int i = 1; i < numPoints; ++i)
path.addLineTo(FloatPoint(m_coords[i * 2], m_coords[i * 2 + 1]));
path.closeSubpath();
}
break;
case Circle:
if (m_coords.size() >= 3) {
double radius = m_coords[2];
if (radius > 0)
path.addEllipse(FloatRect(m_coords[0] - radius, m_coords[1] - radius, 2 * radius, 2 * radius));
}
break;
case Rect:
if (m_coords.size() >= 4) {
double x0 = m_coords[0];
double y0 = m_coords[1];
double x1 = m_coords[2];
double y1 = m_coords[3];
path.addRect(FloatRect(x0, y0, x1 - x0, y1 - y0));
}
break;
case Default:
path.addRect(FloatRect(0, 0, width, height));
break;
case Unknown:
break;
}
return path;
}
HTMLImageElement* HTMLAreaElement::imageElement() const
{
RefPtr<Node> mapElement = parentNode();
if (!is<HTMLMapElement>(mapElement))
return nullptr;
return downcast<HTMLMapElement>(*mapElement).imageElement();
}
bool HTMLAreaElement::isKeyboardFocusable(KeyboardEvent*) const
{
return isFocusable();
}
bool HTMLAreaElement::isMouseFocusable() const
{
return isFocusable();
}
bool HTMLAreaElement::isFocusable() const
{
RefPtr<HTMLImageElement> image = imageElement();
if (!image || !image->isFocusableWithoutResolvingFullStyle())
return false;
return supportsFocus() && tabIndexSetExplicitly().value_or(0) >= 0;
}
void HTMLAreaElement::setFocus(bool shouldBeFocused, FocusVisibility visibility)
{
if (focused() == shouldBeFocused)
return;
HTMLAnchorElement::setFocus(shouldBeFocused, visibility);
RefPtr<HTMLImageElement> imageElement = this->imageElement();
if (!imageElement)
return;
auto* renderer = imageElement->renderer();
if (!is<RenderImage>(renderer))
return;
downcast<RenderImage>(*renderer).areaElementFocusChanged(this);
}
RefPtr<Element> HTMLAreaElement::focusAppearanceUpdateTarget()
{
if (!isFocusable())
return nullptr;
return imageElement();
}
bool HTMLAreaElement::supportsFocus() const
{
// If the AREA element was a link, it should support focus.
// The inherited method is not used because it assumes that a render object must exist
// for the element to support focus. AREA elements do not have render objects.
return isLink();
}
AtomString HTMLAreaElement::target() const
{
return attributeWithoutSynchronization(targetAttr);
}
}