239 lines
7.6 KiB
C++
239 lines
7.6 KiB
C++
/*
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* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
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* Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
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* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
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* Copyright (C) 2010-2019 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "SVGAElement.h"
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#include "DOMTokenList.h"
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#include "Document.h"
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#include "EventHandler.h"
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#include "Frame.h"
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#include "FrameLoader.h"
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#include "FrameLoaderTypes.h"
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#include "HTMLAnchorElement.h"
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#include "HTMLParserIdioms.h"
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#include "KeyboardEvent.h"
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#include "MouseEvent.h"
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#include "PlatformMouseEvent.h"
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#include "RenderSVGInline.h"
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#include "RenderSVGText.h"
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#include "RenderSVGTransformableContainer.h"
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#include "ResourceRequest.h"
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#include "SVGNames.h"
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#include "SVGSMILElement.h"
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#include "XLinkNames.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(SVGAElement);
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inline SVGAElement::SVGAElement(const QualifiedName& tagName, Document& document)
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: SVGGraphicsElement(tagName, document)
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, SVGURIReference(this)
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{
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ASSERT(hasTagName(SVGNames::aTag));
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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PropertyRegistry::registerProperty<SVGNames::targetAttr, &SVGAElement::m_target>();
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});
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}
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Ref<SVGAElement> SVGAElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new SVGAElement(tagName, document));
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}
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String SVGAElement::title() const
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{
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// If the xlink:title is set (non-empty string), use it.
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const AtomString& title = attributeWithoutSynchronization(XLinkNames::titleAttr);
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if (!title.isEmpty())
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return title;
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// Otherwise, use the title of this element.
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return SVGElement::title();
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}
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void SVGAElement::parseAttribute(const QualifiedName& name, const AtomString& value)
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{
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if (name == SVGNames::targetAttr) {
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m_target->setBaseValInternal(value);
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return;
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} else if (name == SVGNames::relAttr) {
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if (m_relList)
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m_relList->associatedAttributeValueChanged(value);
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}
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SVGGraphicsElement::parseAttribute(name, value);
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SVGURIReference::parseAttribute(name, value);
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}
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void SVGAElement::svgAttributeChanged(const QualifiedName& attrName)
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{
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if (SVGURIReference::isKnownAttribute(attrName)) {
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bool wasLink = isLink();
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setIsLink(!href().isNull() && !shouldProhibitLinks(this));
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if (wasLink != isLink()) {
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InstanceInvalidationGuard guard(*this);
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invalidateStyleForSubtree();
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}
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return;
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}
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SVGGraphicsElement::svgAttributeChanged(attrName);
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}
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RenderPtr<RenderElement> SVGAElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
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{
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if (is<SVGElement>(parentNode()) && downcast<SVGElement>(*parentNode()).isTextContent())
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return createRenderer<RenderSVGInline>(*this, WTFMove(style));
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return createRenderer<RenderSVGTransformableContainer>(*this, WTFMove(style));
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}
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void SVGAElement::defaultEventHandler(Event& event)
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{
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if (isLink()) {
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if (focused() && isEnterKeyKeydownEvent(event)) {
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event.setDefaultHandled();
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dispatchSimulatedClick(&event);
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return;
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}
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if (MouseEvent::canTriggerActivationBehavior(event)) {
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String url = stripLeadingAndTrailingHTMLSpaces(href());
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if (url[0] == '#') {
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auto targetElement = makeRefPtr(treeScope().getElementById(url.substringSharingImpl(1)));
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if (is<SVGSMILElement>(targetElement)) {
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downcast<SVGSMILElement>(*targetElement).beginByLinkActivation();
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event.setDefaultHandled();
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return;
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}
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}
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String target = this->target();
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if (target.isEmpty() && attributeWithoutSynchronization(XLinkNames::showAttr) == "new")
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target = "_blank";
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event.setDefaultHandled();
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auto frame = makeRefPtr(document().frame());
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if (!frame)
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return;
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frame->loader().changeLocation(document().completeURL(url), target, &event, ReferrerPolicy::EmptyString, document().shouldOpenExternalURLsPolicyToPropagate());
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return;
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}
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}
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SVGGraphicsElement::defaultEventHandler(event);
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}
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int SVGAElement::defaultTabIndex() const
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{
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return 0;
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}
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bool SVGAElement::supportsFocus() const
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{
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if (hasEditableStyle())
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return SVGGraphicsElement::supportsFocus();
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// If not a link we should still be able to focus the element if it has a tabIndex.
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return isLink() || SVGGraphicsElement::supportsFocus();
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}
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bool SVGAElement::isURLAttribute(const Attribute& attribute) const
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{
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return SVGURIReference::isKnownAttribute(attribute.name()) || SVGGraphicsElement::isURLAttribute(attribute);
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}
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bool SVGAElement::isMouseFocusable() const
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{
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// Links are focusable by default, but only allow links with tabindex or contenteditable to be mouse focusable.
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// https://bugs.webkit.org/show_bug.cgi?id=26856
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if (isLink())
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return Element::supportsFocus();
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return SVGElement::isMouseFocusable();
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}
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bool SVGAElement::isKeyboardFocusable(KeyboardEvent* event) const
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{
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if (isFocusable() && Element::supportsFocus())
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return SVGElement::isKeyboardFocusable(event);
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if (isLink())
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return document().frame()->eventHandler().tabsToLinks(event);
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return SVGElement::isKeyboardFocusable(event);
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}
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bool SVGAElement::canStartSelection() const
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{
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if (!isLink())
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return SVGElement::canStartSelection();
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return hasEditableStyle();
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}
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bool SVGAElement::childShouldCreateRenderer(const Node& child) const
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{
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// http://www.w3.org/2003/01/REC-SVG11-20030114-errata#linking-text-environment
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// The 'a' element may contain any element that its parent may contain, except itself.
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if (child.hasTagName(SVGNames::aTag))
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return false;
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if (parentElement() && parentElement()->isSVGElement())
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return parentElement()->childShouldCreateRenderer(child);
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return SVGElement::childShouldCreateRenderer(child);
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}
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bool SVGAElement::willRespondToMouseClickEvents()
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{
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return isLink() || SVGGraphicsElement::willRespondToMouseClickEvents();
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}
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SharedStringHash SVGAElement::visitedLinkHash() const
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{
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ASSERT(isLink());
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if (!m_storedVisitedLinkHash)
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m_storedVisitedLinkHash = computeVisitedLinkHash(document().baseURL(), getAttribute(SVGNames::hrefAttr, XLinkNames::hrefAttr));
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return *m_storedVisitedLinkHash;
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}
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DOMTokenList& SVGAElement::relList()
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{
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if (!m_relList) {
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m_relList = makeUnique<DOMTokenList>(*this, SVGNames::relAttr, [](Document&, StringView token) {
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#if USE(SYSTEM_PREVIEW)
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if (equalIgnoringASCIICase(token, "ar"))
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return true;
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#endif
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return equalIgnoringASCIICase(token, "noreferrer") || equalIgnoringASCIICase(token, "noopener");
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});
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}
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return *m_relList;
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}
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} // namespace WebCore
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