| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com) |
| * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com) |
| * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org> |
| * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org> |
| * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| * Copyright (C) Research In Motion Limited 2011. All rights reserved. |
| * Copyright (C) 2012 Google 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 "core/dom/VisitedLinkState.h" |
| |
| #include "HTMLNames.h" |
| #include "core/dom/NodeTraversal.h" |
| #include "core/html/HTMLAnchorElement.h" |
| #include "core/page/Page.h" |
| #include "public/platform/Platform.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| inline static const AtomicString& linkAttribute(Element* element) |
| { |
| ASSERT(element->isLink()); |
| if (element->isHTMLElement()) |
| return element->fastGetAttribute(HTMLNames::hrefAttr); |
| ASSERT(element->isSVGElement()); |
| return element->getAttribute(XLinkNames::hrefAttr); |
| } |
| |
| inline static LinkHash linkHashForElement(Document* document, Element* element) |
| { |
| if (isHTMLAnchorElement(element)) |
| return toHTMLAnchorElement(element)->visitedLinkHash(); |
| return visitedLinkHash(document->baseURL(), linkAttribute(element)); |
| } |
| |
| inline static LinkHash linkHashForElementWithAttribute(Document* document, Element* element, const AtomicString& attribute) |
| { |
| ASSERT(linkAttribute(element) == attribute); |
| if (isHTMLAnchorElement(element)) |
| return toHTMLAnchorElement(element)->visitedLinkHash(); |
| return visitedLinkHash(document->baseURL(), attribute); |
| } |
| |
| PassOwnPtr<VisitedLinkState> VisitedLinkState::create(Document* document) |
| { |
| return adoptPtr(new VisitedLinkState(document)); |
| } |
| |
| VisitedLinkState::VisitedLinkState(Document* document) |
| : m_document(document) |
| { |
| } |
| |
| void VisitedLinkState::invalidateStyleForAllLinks() |
| { |
| if (m_linksCheckedForVisitedState.isEmpty()) |
| return; |
| for (Element* element = ElementTraversal::firstWithin(m_document); element; element = ElementTraversal::next(element)) { |
| if (element->isLink()) |
| element->setNeedsStyleRecalc(); |
| } |
| } |
| |
| void VisitedLinkState::invalidateStyleForLink(LinkHash linkHash) |
| { |
| if (!m_linksCheckedForVisitedState.contains(linkHash)) |
| return; |
| for (Element* element = ElementTraversal::firstWithin(m_document); element; element = ElementTraversal::next(element)) { |
| if (element->isLink() && linkHashForElement(m_document, element) == linkHash) |
| element->setNeedsStyleRecalc(); |
| } |
| } |
| |
| EInsideLink VisitedLinkState::determineLinkStateSlowCase(Element* element) |
| { |
| ASSERT(element->isLink()); |
| |
| const AtomicString& attribute = linkAttribute(element); |
| |
| if (attribute.isNull()) |
| return NotInsideLink; // This can happen for <img usemap> |
| |
| // An empty attribute refers to the document itself which is always |
| // visited. It is useful to check this explicitly so that visited |
| // links can be tested in platform independent manner, without |
| // explicit support in the test harness. |
| if (attribute.isEmpty()) |
| return InsideVisitedLink; |
| |
| // We null check the Frame here to avoid canonicalizing and hashing |
| // URLs in documents that aren't attached to Frames (like documents |
| // from XMLHttpRequest). |
| if (!m_document->frame()) |
| return InsideUnvisitedLink; |
| |
| LinkHash hash = linkHashForElementWithAttribute(m_document, element, attribute); |
| if (!hash) |
| return InsideUnvisitedLink; |
| |
| m_linksCheckedForVisitedState.add(hash); |
| return WebKit::Platform::current()->isLinkVisited(hash) ? InsideVisitedLink : InsideUnvisitedLink; |
| } |
| |
| } |