1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "VisitedLinkTableController.h"
28
29#include "VisitedLinkProviderMessages.h"
30#include "VisitedLinkTableControllerMessages.h"
31#include "WebPage.h"
32#include "WebProcess.h"
33#include <WebCore/PageCache.h>
34#include <wtf/NeverDestroyed.h>
35
36using namespace WebCore;
37
38namespace WebKit {
39
40static HashMap<uint64_t, VisitedLinkTableController*>& visitedLinkTableControllers()
41{
42    static NeverDestroyed<HashMap<uint64_t, VisitedLinkTableController*>> visitedLinkTableControllers;
43
44    return visitedLinkTableControllers;
45}
46
47PassRefPtr<VisitedLinkTableController> VisitedLinkTableController::getOrCreate(uint64_t identifier)
48{
49    auto& visitedLinkTableControllerPtr = visitedLinkTableControllers().add(identifier, nullptr).iterator->value;
50    if (visitedLinkTableControllerPtr)
51        return visitedLinkTableControllerPtr;
52
53    RefPtr<VisitedLinkTableController> visitedLinkTableController = adoptRef(new VisitedLinkTableController(identifier));
54    visitedLinkTableControllerPtr = visitedLinkTableController.get();
55
56    return visitedLinkTableController.release();
57}
58
59VisitedLinkTableController::VisitedLinkTableController(uint64_t identifier)
60    : m_identifier(identifier)
61{
62    WebProcess::shared().addMessageReceiver(Messages::VisitedLinkTableController::messageReceiverName(), m_identifier, *this);
63}
64
65VisitedLinkTableController::~VisitedLinkTableController()
66{
67    ASSERT(visitedLinkTableControllers().contains(m_identifier));
68
69    WebProcess::shared().removeMessageReceiver(Messages::VisitedLinkTableController::messageReceiverName(), m_identifier);
70
71    visitedLinkTableControllers().remove(m_identifier);
72}
73
74bool VisitedLinkTableController::isLinkVisited(Page&, LinkHash linkHash, const URL&, const AtomicString&)
75{
76    return m_visitedLinkTable.isLinkVisited(linkHash);
77}
78
79void VisitedLinkTableController::addVisitedLink(Page& page, LinkHash linkHash)
80{
81    if (m_visitedLinkTable.isLinkVisited(linkHash))
82        return;
83
84    WebPage* webPage = WebPage::fromCorePage(&page);
85    if (!webPage)
86        return;
87
88    WebProcess::shared().parentProcessConnection()->send(Messages::VisitedLinkProvider::AddVisitedLinkHashFromPage(webPage->pageID(), linkHash), m_identifier);
89}
90
91void VisitedLinkTableController::setVisitedLinkTable(const SharedMemory::Handle& handle)
92{
93    RefPtr<SharedMemory> sharedMemory = SharedMemory::create(handle, SharedMemory::ReadOnly);
94    if (!sharedMemory)
95        return;
96
97    m_visitedLinkTable.setSharedMemory(sharedMemory.release());
98
99    invalidateStylesForAllLinks();
100    pageCache()->markPagesForVistedLinkStyleRecalc();
101}
102
103void VisitedLinkTableController::visitedLinkStateChanged(const Vector<WebCore::LinkHash>& linkHashes)
104{
105    for (auto linkHash : linkHashes)
106        invalidateStylesForLink(linkHash);
107    pageCache()->markPagesForVistedLinkStyleRecalc();
108}
109
110void VisitedLinkTableController::allVisitedLinkStateChanged()
111{
112    invalidateStylesForAllLinks();
113    pageCache()->markPagesForVistedLinkStyleRecalc();
114}
115
116void VisitedLinkTableController::removeAllVisitedLinks()
117{
118    m_visitedLinkTable.clear();
119
120    invalidateStylesForAllLinks();
121    pageCache()->markPagesForVistedLinkStyleRecalc();
122}
123
124} // namespace WebKit
125