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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2009 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 "HTMLNames.h"
#include "HitTestResult.h"
#include "MappedAttribute.h"
#include "Path.h"
#include "RenderObject.h"
using namespace std;
namespace WebCore {
using namespace HTMLNames;
HTMLAreaElement::HTMLAreaElement(const QualifiedName& tagName, Document* document)
: HTMLAnchorElement(tagName, document)
, m_coords(0)
, m_coordsLen(0)
, m_lastSize(-1, -1)
, m_shape(Unknown)
{
ASSERT(hasTagName(areaTag));
}
HTMLAreaElement::~HTMLAreaElement()
{
delete [] m_coords;
}
void HTMLAreaElement::parseMappedAttribute(MappedAttribute* attr)
{
if (attr->name() == shapeAttr) {
if (equalIgnoringCase(attr->value(), "default"))
m_shape = Default;
else if (equalIgnoringCase(attr->value(), "circle"))
m_shape = Circle;
else if (equalIgnoringCase(attr->value(), "poly"))
m_shape = Poly;
else if (equalIgnoringCase(attr->value(), "rect"))
m_shape = Rect;
} else if (attr->name() == coordsAttr) {
delete [] m_coords;
m_coords = newCoordsArray(attr->value().string(), m_coordsLen);
} else if (attr->name() == altAttr || attr->name() == accesskeyAttr) {
// Do nothing.
} else
HTMLAnchorElement::parseMappedAttribute(attr);
}
bool HTMLAreaElement::mapMouseEvent(int x, int y, const IntSize& size, HitTestResult& result)
{
if (m_lastSize != size) {
m_region.set(new Path(getRegion(size)));
m_lastSize = size;
}
if (!m_region->contains(IntPoint(x, y)))
return false;
result.setInnerNode(this);
result.setURLElement(this);
return true;
}
IntRect HTMLAreaElement::getRect(RenderObject* obj) const
{
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = obj->localToAbsolute();
Path p = getRegion(m_lastSize);
p.translate(absPos - FloatPoint());
return enclosingIntRect(p.boundingRect());
}
Path HTMLAreaElement::getRegion(const IntSize& size) const
{
if (!m_coords && m_shape != Default)
return Path();
int width = size.width();
int 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_coordsLen == 3)
shape = Circle;
else if (m_coordsLen == 4)
shape = Rect;
else if (m_coordsLen >= 6)
shape = Poly;
}
Path path;
switch (shape) {
case Poly:
if (m_coordsLen >= 6) {
int numPoints = m_coordsLen / 2;
path.moveTo(FloatPoint(m_coords[0].calcMinValue(width), m_coords[1].calcMinValue(height)));
for (int i = 1; i < numPoints; ++i)
path.addLineTo(FloatPoint(m_coords[i * 2].calcMinValue(width), m_coords[i * 2 + 1].calcMinValue(height)));
path.closeSubpath();
}
break;
case Circle:
if (m_coordsLen >= 3) {
Length radius = m_coords[2];
int r = min(radius.calcMinValue(width), radius.calcMinValue(height));
path.addEllipse(FloatRect(m_coords[0].calcMinValue(width) - r, m_coords[1].calcMinValue(height) - r, 2 * r, 2 * r));
}
break;
case Rect:
if (m_coordsLen >= 4) {
int x0 = m_coords[0].calcMinValue(width);
int y0 = m_coords[1].calcMinValue(height);
int x1 = m_coords[2].calcMinValue(width);
int y1 = m_coords[3].calcMinValue(height);
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;
}
KURL HTMLAreaElement::href() const
{
return document()->completeURL(getAttribute(hrefAttr));
}
bool HTMLAreaElement::noHref() const
{
return !getAttribute(nohrefAttr).isNull();
}
void HTMLAreaElement::setNoHref(bool noHref)
{
setAttribute(nohrefAttr, noHref ? "" : 0);
}
bool HTMLAreaElement::isFocusable() const
{
return HTMLElement::isFocusable();
}
String HTMLAreaElement::target() const
{
return getAttribute(targetAttr);
}
}
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