/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Simon Hausmann <hausmann@kde.org>
* Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* (C) 2006 Graham Dennis (graham.dennis@gmail.com)
*
* 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 "HTMLAnchorElement.h"
#include "DNS.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameLoaderTypes.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
#include "KeyboardEvent.h"
#include "MappedAttribute.h"
#include "MouseEvent.h"
#include "Page.h"
#include "RenderImage.h"
#include "Settings.h"
namespace WebCore {
using namespace HTMLNames;
HTMLAnchorElement::HTMLAnchorElement(const QualifiedName& tagName, Document* document)
: HTMLElement(tagName, document, CreateElement)
, m_wasShiftKeyDownOnMouseDown(false)
, m_linkRelations(0)
{
}
PassRefPtr<HTMLAnchorElement> HTMLAnchorElement::create(Document* document)
{
return adoptRef(new HTMLAnchorElement(aTag, document));
}
PassRefPtr<HTMLAnchorElement> HTMLAnchorElement::create(const QualifiedName& tagName, Document* document)
{
return adoptRef(new HTMLAnchorElement(tagName, document));
}
// This function does not allow leading spaces before the port number.
static unsigned parsePortFromStringPosition(const String& value, unsigned portStart, unsigned& portEnd)
{
portEnd = portStart;
while (isASCIIDigit(value[portEnd]))
++portEnd;
return value.substring(portStart, portEnd - portStart).toUInt();
}
bool HTMLAnchorElement::supportsFocus() const
{
if (isContentEditable())
return HTMLElement::supportsFocus();
// If not a link we should still be able to focus the element if it has tabIndex.
return isLink() || HTMLElement::supportsFocus();
}
bool HTMLAnchorElement::isMouseFocusable() const
{
// Anchor elements should be mouse focusable, https://bugs.webkit.org/show_bug.cgi?id=26856
#if !PLATFORM(GTK) && !PLATFORM(QT)
if (isLink())
// Only allow links with tabIndex or contentEditable to be mouse focusable.
return HTMLElement::supportsFocus();
#endif
// Allow tab index etc to control focus.
return HTMLElement::isMouseFocusable();
}
bool HTMLAnchorElement::isKeyboardFocusable(KeyboardEvent* event) const
{
if (!isLink())
return HTMLElement::isKeyboardFocusable(event);
if (!isFocusable())
return false;
if (!document()->frame())
return false;
if (!document()->frame()->eventHandler()->tabsToLinks(event))
return false;
if (!renderer() || !renderer()->isBoxModelObject())
return false;
// Before calling absoluteRects, check for the common case where the renderer
// is non-empty, since this is a faster check and almost always returns true.
RenderBoxModelObject* box = toRenderBoxModelObject(renderer());
if (!box->borderBoundingBox().isEmpty())
return true;
Vector<IntRect> rects;
FloatPoint absPos = renderer()->localToAbsolute();
renderer()->absoluteRects(rects, absPos.x(), absPos.y());
size_t n = rects.size();
for (size_t i = 0; i < n; ++i)
if (!rects[i].isEmpty())
return true;
return false;
}
void HTMLAnchorElement::defaultEventHandler(Event* evt)
{
// React on clicks and on keypresses.
// Don't make this KEYUP_EVENT again, it makes khtml follow links it shouldn't,
// when pressing Enter in the combo.
if (isLink() && (evt->type() == eventNames().clickEvent || (evt->type() == eventNames().keydownEvent && focused()))) {
MouseEvent* e = 0;
if (evt->type() == eventNames().clickEvent && evt->isMouseEvent())
e = static_cast<MouseEvent*>(evt);
KeyboardEvent* k = 0;
if (evt->type() == eventNames().keydownEvent && evt->isKeyboardEvent())
k = static_cast<KeyboardEvent*>(evt);
if (e && e->button() == RightButton) {
HTMLElement::defaultEventHandler(evt);
return;
}
// If the link is editable, then we need to check the settings to see whether or not to follow the link
if (isContentEditable()) {
EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;
if (Settings* settings = document()->settings())
editableLinkBehavior = settings->editableLinkBehavior();
switch (editableLinkBehavior) {
// Always follow the link (Safari 2.0 behavior)
default:
case EditableLinkDefaultBehavior:
case EditableLinkAlwaysLive:
break;
case EditableLinkNeverLive:
HTMLElement::defaultEventHandler(evt);
return;
// If the selection prior to clicking on this link resided in the same editable block as this link,
// and the shift key isn't pressed, we don't want to follow the link
case EditableLinkLiveWhenNotFocused:
if (e && !e->shiftKey() && m_rootEditableElementForSelectionOnMouseDown == rootEditableElement()) {
HTMLElement::defaultEventHandler(evt);
return;
}
break;
// Only follow the link if the shift key is down (WinIE/Firefox behavior)
case EditableLinkOnlyLiveWithShiftKey:
if (e && !e->shiftKey()) {
HTMLElement::defaultEventHandler(evt);
return;
}
break;
}
}
if (k) {
if (k->keyIdentifier() != "Enter") {
HTMLElement::defaultEventHandler(evt);
return;
}
evt->setDefaultHandled();
dispatchSimulatedClick(evt);
return;
}
String url = deprecatedParseURL(getAttribute(hrefAttr));
ASSERT(evt->target());
ASSERT(evt->target()->toNode());
if (evt->target()->toNode()->hasTagName(imgTag)) {
HTMLImageElement* img = static_cast<HTMLImageElement*>(evt->target()->toNode());
if (img && img->isServerMap()) {
RenderImage* r = toRenderImage(img->renderer());
if (r && e) {
// FIXME: broken with transforms
FloatPoint absPos = r->localToAbsolute();
int x = e->pageX() - absPos.x();
int y = e->pageY() - absPos.y();
url += "?";
url += String::number(x);
url += ",";
url += String::number(y);
} else {
evt->setDefaultHandled();
HTMLElement::defaultEventHandler(evt);
return;
}
}
}
if (!evt->defaultPrevented() && document()->frame())
document()->frame()->loader()->urlSelected(document()->completeURL(url), getAttribute(targetAttr), evt, false, false, true, hasRel(RelationNoReferrer) ? NoReferrer : SendReferrer);
evt->setDefaultHandled();
} else if (isLink() && isContentEditable()) {
// This keeps track of the editable block that the selection was in (if it was in one) just before the link was clicked
// for the LiveWhenNotFocused editable link behavior
if (evt->type() == eventNames().mousedownEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() != RightButton && document()->frame() && document()->frame()->selection()) {
MouseEvent* e = static_cast<MouseEvent*>(evt);
m_rootEditableElementForSelectionOnMouseDown = document()->frame()->selection()->rootEditableElement();
m_wasShiftKeyDownOnMouseDown = e && e->shiftKey();
} else if (evt->type() == eventNames().mouseoverEvent) {
// These are cleared on mouseover and not mouseout because their values are needed for drag events, but these happen
// after mouse out events.
m_rootEditableElementForSelectionOnMouseDown = 0;
m_wasShiftKeyDownOnMouseDown = false;
}
}
HTMLElement::defaultEventHandler(evt);
}
void HTMLAnchorElement::setActive(bool down, bool pause)
{
if (isContentEditable()) {
EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;
if (Settings* settings = document()->settings())
editableLinkBehavior = settings->editableLinkBehavior();
switch (editableLinkBehavior) {
default:
case EditableLinkDefaultBehavior:
case EditableLinkAlwaysLive:
break;
case EditableLinkNeverLive:
return;
// Don't set the link to be active if the current selection is in the same editable block as
// this link
case EditableLinkLiveWhenNotFocused:
if (down && document()->frame() && document()->frame()->selection() &&
document()->frame()->selection()->rootEditableElement() == rootEditableElement())
return;
break;
case EditableLinkOnlyLiveWithShiftKey:
return;
}
}
ContainerNode::setActive(down, pause);
}
void HTMLAnchorElement::parseMappedAttribute(MappedAttribute *attr)
{
if (attr->name() == hrefAttr) {
bool wasLink = isLink();
setIsLink(!attr->isNull());
if (wasLink != isLink())
setNeedsStyleRecalc();
if (isLink()) {
String parsedURL = deprecatedParseURL(attr->value());
if (document()->isDNSPrefetchEnabled()) {
if (protocolIs(parsedURL, "http") || protocolIs(parsedURL, "https") || parsedURL.startsWith("//"))
prefetchDNS(document()->completeURL(parsedURL).host());
}
if (document()->page() && !document()->page()->javaScriptURLsAreAllowed() && protocolIsJavaScript(parsedURL)) {
setIsLink(false);
attr->setValue(nullAtom);
}
}
} else if (attr->name() == nameAttr ||
attr->name() == titleAttr) {
// Do nothing.
} else if (attr->name() == relAttr)
setRel(attr->value());
else
HTMLElement::parseMappedAttribute(attr);
}
void HTMLAnchorElement::accessKeyAction(bool sendToAnyElement)
{
// send the mouse button events if the caller specified sendToAnyElement
dispatchSimulatedClick(0, sendToAnyElement);
}
bool HTMLAnchorElement::isURLAttribute(Attribute *attr) const
{
return attr->name() == hrefAttr;
}
bool HTMLAnchorElement::canStartSelection() const
{
// FIXME: We probably want this same behavior in SVGAElement too
if (!isLink())
return HTMLElement::canStartSelection();
return isContentEditable();
}
bool HTMLAnchorElement::draggable() const
{
// Should be draggable if we have an href attribute.
const AtomicString& value = getAttribute(draggableAttr);
if (equalIgnoringCase(value, "true"))
return true;
if (equalIgnoringCase(value, "false"))
return false;
return hasAttribute(hrefAttr);
}
KURL HTMLAnchorElement::href() const
{
return document()->completeURL(deprecatedParseURL(getAttribute(hrefAttr)));
}
void HTMLAnchorElement::setHref(const AtomicString& value)
{
setAttribute(hrefAttr, value);
}
bool HTMLAnchorElement::hasRel(uint32_t relation) const
{
return m_linkRelations & relation;
}
void HTMLAnchorElement::setRel(const String& value)
{
m_linkRelations = 0;
SpaceSplitString newLinkRelations(value, true);
// FIXME: Add link relations as they are implemented
if (newLinkRelations.contains("noreferrer"))
m_linkRelations |= RelationNoReferrer;
}
const AtomicString& HTMLAnchorElement::name() const
{
return getAttribute(nameAttr);
}
short HTMLAnchorElement::tabIndex() const
{
// Skip the supportsFocus check in HTMLElement.
return Element::tabIndex();
}
String HTMLAnchorElement::target() const
{
return getAttribute(targetAttr);
}
String HTMLAnchorElement::hash() const
{
String fragmentIdentifier = href().fragmentIdentifier();
return fragmentIdentifier.isEmpty() ? "" : "#" + fragmentIdentifier;
}
void HTMLAnchorElement::setHash(const String& value)
{
KURL url = href();
if (value[0] == '#')
url.setFragmentIdentifier(value.substring(1));
else
url.setFragmentIdentifier(value);
setHref(url.string());
}
String HTMLAnchorElement::host() const
{
const KURL& url = href();
if (url.hostEnd() == url.pathStart())
return url.host();
if (isDefaultPortForProtocol(url.port(), url.protocol()))
return url.host();
return url.host() + ":" + String::number(url.port());
}
void HTMLAnchorElement::setHost(const String& value)
{
if (value.isEmpty())
return;
KURL url = href();
if (!url.canSetHostOrPort())
return;
int separator = value.find(':');
if (!separator)
return;
if (separator == -1)
url.setHostAndPort(value);
else {
unsigned portEnd;
unsigned port = parsePortFromStringPosition(value, separator + 1, portEnd);
if (!port) {
// http://dev.w3.org/html5/spec/infrastructure.html#url-decomposition-idl-attributes
// specifically goes against RFC 3986 (p3.2) and
// requires setting the port to "0" if it is set to empty string.
url.setHostAndPort(value.substring(0, separator + 1) + "0");
} else {
if (isDefaultPortForProtocol(port, url.protocol()))
url.setHostAndPort(value.substring(0, separator));
else
url.setHostAndPort(value.substring(0, portEnd));
}
}
setHref(url.string());
}
String HTMLAnchorElement::hostname() const
{
return href().host();
}
void HTMLAnchorElement::setHostname(const String& value)
{
// Before setting new value:
// Remove all leading U+002F SOLIDUS ("/") characters.
unsigned i = 0;
unsigned hostLength = value.length();
while (value[i] == '/')
i++;
if (i == hostLength)
return;
KURL url = href();
if (!url.canSetHostOrPort())
return;
url.setHost(value.substring(i));
setHref(url.string());
}
String HTMLAnchorElement::pathname() const
{
return href().path();
}
void HTMLAnchorElement::setPathname(const String& value)
{
KURL url = href();
if (!url.canSetPathname())
return;
if (value[0] == '/')
url.setPath(value);
else
url.setPath("/" + value);
setHref(url.string());
}
String HTMLAnchorElement::port() const
{
return String::number(href().port());
}
void HTMLAnchorElement::setPort(const String& value)
{
KURL url = href();
if (!url.canSetHostOrPort())
return;
// http://dev.w3.org/html5/spec/infrastructure.html#url-decomposition-idl-attributes
// specifically goes against RFC 3986 (p3.2) and
// requires setting the port to "0" if it is set to empty string.
unsigned port = value.toUInt();
if (isDefaultPortForProtocol(port, url.protocol()))
url.removePort();
else
url.setPort(port);
setHref(url.string());
}
String HTMLAnchorElement::protocol() const
{
return href().protocol() + ":";
}
void HTMLAnchorElement::setProtocol(const String& value)
{
KURL url = href();
url.setProtocol(value);
setHref(url.string());
}
String HTMLAnchorElement::search() const
{
String query = href().query();
return query.isEmpty() ? "" : "?" + query;
}
void HTMLAnchorElement::setSearch(const String& value)
{
KURL url = href();
String newSearch = (value[0] == '?') ? value.substring(1) : value;
// Make sure that '#' in the query does not leak to the hash.
url.setQuery(newSearch.replace('#', "%23"));
setHref(url.string());
}
String HTMLAnchorElement::text() const
{
return innerText();
}
String HTMLAnchorElement::toString() const
{
return href().string();
}
bool HTMLAnchorElement::isLiveLink() const
{
if (!isLink())
return false;
if (!isContentEditable())
return true;
EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;
if (Settings* settings = document()->settings())
editableLinkBehavior = settings->editableLinkBehavior();
switch (editableLinkBehavior) {
default:
case EditableLinkDefaultBehavior:
case EditableLinkAlwaysLive:
return true;
case EditableLinkNeverLive:
return false;
// Don't set the link to be live if the current selection is in the same editable block as
// this link or if the shift key is down
case EditableLinkLiveWhenNotFocused:
return m_wasShiftKeyDownOnMouseDown || m_rootEditableElementForSelectionOnMouseDown != rootEditableElement();
case EditableLinkOnlyLiveWithShiftKey:
return m_wasShiftKeyDownOnMouseDown;
}
}
}