PageGroup.cpp 5.12 KB
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/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"
#include "PageGroup.h"

#include "ChromeClient.h"
#include "Document.h"
#include "Page.h"
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#include "Settings.h"
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#if ENABLE(DOM_STORAGE)
#include "LocalStorage.h"
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#include "StorageArea.h"
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#endif
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#if PLATFORM(CHROMIUM)
#include "ChromiumBridge.h"
#endif

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namespace WebCore {

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static unsigned getUniqueIdentifier()
{
    static unsigned currentIdentifier = 0;
    return ++currentIdentifier;
}

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// --------

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static bool shouldTrackVisitedLinks;

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PageGroup::PageGroup(const String& name)
    : m_name(name)
    , m_visitedLinksPopulated(false)
    , m_identifier(getUniqueIdentifier())
{
}

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PageGroup::PageGroup(Page* page)
    : m_visitedLinksPopulated(false)
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    , m_identifier(getUniqueIdentifier())
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{
    ASSERT(page);
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    addPage(page);
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}

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typedef HashMap<String, PageGroup*> PageGroupMap;
static PageGroupMap* pageGroups = 0;

PageGroup* PageGroup::pageGroup(const String& groupName)
{
    ASSERT(!groupName.isEmpty());
    
    if (!pageGroups)
        pageGroups = new PageGroupMap;

    pair<PageGroupMap::iterator, bool> result = pageGroups->add(groupName, 0);

    if (result.second) {
        ASSERT(!result.first->second);
        result.first->second = new PageGroup(groupName);
    }

    ASSERT(result.first->second);
    return result.first->second;
}

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void PageGroup::closeLocalStorage()
{
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#if ENABLE(DOM_STORAGE)
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    if (!pageGroups)
        return;

    PageGroupMap::iterator end = pageGroups->end();

    for (PageGroupMap::iterator it = pageGroups->begin(); it != end; ++it) {
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        if (it->second->hasLocalStorage())
            it->second->localStorage()->close();
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    }
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#endif
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}

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void PageGroup::addPage(Page* page)
{
    ASSERT(page);
    ASSERT(!m_pages.contains(page));
    m_pages.add(page);
}

void PageGroup::removePage(Page* page)
{
    ASSERT(page);
    ASSERT(m_pages.contains(page));
    m_pages.remove(page);
}

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bool PageGroup::isLinkVisited(LinkHash visitedLinkHash)
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{
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#if PLATFORM(CHROMIUM)
    // Use Chromium's built-in visited link database.
    return ChromiumBridge::isLinkVisited(visitedLinkHash);
#else
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    if (!m_visitedLinksPopulated) {
        m_visitedLinksPopulated = true;
        ASSERT(!m_pages.isEmpty());
        (*m_pages.begin())->chrome()->client()->populateVisitedLinks();
    }
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    return m_visitedLinkHashes.contains(visitedLinkHash);
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#endif
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}
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inline void PageGroup::addVisitedLink(LinkHash hash)
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{
    ASSERT(shouldTrackVisitedLinks);
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#if !PLATFORM(CHROMIUM)
    if (!m_visitedLinkHashes.add(hash).second)
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        return;
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#endif
    Page::visitedStateChanged(this, hash);
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}

void PageGroup::addVisitedLink(const KURL& url)
{
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    if (!shouldTrackVisitedLinks)
        return;
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    ASSERT(!url.isEmpty());
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    addVisitedLink(visitedLinkHash(url.string().characters(), url.string().length()));
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}

void PageGroup::addVisitedLink(const UChar* characters, size_t length)
{
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    if (!shouldTrackVisitedLinks)
        return;
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    addVisitedLink(visitedLinkHash(characters, length));
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}

void PageGroup::removeVisitedLinks()
{
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    m_visitedLinksPopulated = false;
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    if (m_visitedLinkHashes.isEmpty())
        return;
    m_visitedLinkHashes.clear();
    Page::allVisitedStateChanged(this);
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}

void PageGroup::removeAllVisitedLinks()
{
    Page::removeAllVisitedLinks();
}

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void PageGroup::setShouldTrackVisitedLinks(bool shouldTrack)
{
    if (shouldTrackVisitedLinks == shouldTrack)
        return;
    shouldTrackVisitedLinks = shouldTrack;
    if (!shouldTrackVisitedLinks)
        removeAllVisitedLinks();
}

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#if ENABLE(DOM_STORAGE)
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LocalStorage* PageGroup::localStorage()
{
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    if (!m_localStorage) {
        // Need a page in this page group to query the settings for the local storage database path.
        Page* page = *m_pages.begin();
        ASSERT(page);
        m_localStorage = LocalStorage::localStorage(page->settings()->localStorageDatabasePath());
    }

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    return m_localStorage.get();
}
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#endif
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} // namespace WebCore