PageGroup.cpp 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"

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#include "Chrome.h"
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#include "ChromeClient.h"
#include "Document.h"
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#include "Frame.h"
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#include "GroupSettings.h"
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#include "IDBFactoryBackendInterface.h"
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#include "Page.h"
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#include "PageCache.h"
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#include "SecurityOrigin.h"
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#include "Settings.h"
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#include "StorageNamespace.h"
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#if PLATFORM(CHROMIUM)
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#include "PlatformSupport.h"
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#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 = false;
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PageGroup::PageGroup(const String& name)
    : m_name(name)
    , m_visitedLinksPopulated(false)
    , m_identifier(getUniqueIdentifier())
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    , m_groupSettings(GroupSettings::create())
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{
}

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

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PageGroup::~PageGroup()
{
    removeAllUserContent();
}

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PassOwnPtr<PageGroup> PageGroup::create(Page* page)
{
    return adoptPtr(new PageGroup(page));
}

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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()
{
    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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void PageGroup::clearLocalStorageForAllOrigins()
{
    if (!pageGroups)
        return;

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

void PageGroup::clearLocalStorageForOrigin(SecurityOrigin* origin)
{
    if (!pageGroups)
        return;

    PageGroupMap::iterator end = pageGroups->end();
    for (PageGroupMap::iterator it = pageGroups->begin(); it != end; ++it) {
        if (it->second->hasLocalStorage())
            it->second->localStorage()->clearOriginForDeletion(origin);
    }    
}
    
void PageGroup::syncLocalStorage()
{
    if (!pageGroups)
        return;

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

unsigned PageGroup::numberOfPageGroups()
{
    if (!pageGroups)
        return 0;

    return pageGroups->size();
}

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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.
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    return PlatformSupport::isLinkVisited(visitedLinkHash);
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#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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void PageGroup::addVisitedLinkHash(LinkHash hash)
{
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    if (shouldTrackVisitedLinks)
        addVisitedLink(hash);
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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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    pageCache()->markPagesForVistedLinkStyleRecalc();
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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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    pageCache()->markPagesForVistedLinkStyleRecalc();
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}

void PageGroup::removeAllVisitedLinks()
{
    Page::removeAllVisitedLinks();
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    pageCache()->markPagesForVistedLinkStyleRecalc();
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}

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

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StorageNamespace* PageGroup::localStorage()
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{
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    if (!m_localStorage) {
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        // Need a page in this page group to query the settings for the local storage database path.
        // Having these parameters attached to the page settings is unfortunate since these settings are
        // not per-page (and, in fact, we simply grab the settings from some page at random), but
        // at this point we're stuck with it.
        Page* page = *m_pages.begin();
        const String& path = page->settings()->localStorageDatabasePath();
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        unsigned quota = m_groupSettings->localStorageQuotaBytes();
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        m_localStorage = StorageNamespace::localStorageNamespace(path, quota);
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    }
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    return m_localStorage.get();
}
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#if ENABLE(INDEXED_DATABASE)
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IDBFactoryBackendInterface* PageGroup::idbFactory()
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{
    // Do not add page setting based access control here since this object is shared by all pages in
    // the group and having per-page controls is misleading.
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    if (!m_factoryBackend)
        m_factoryBackend = IDBFactoryBackendInterface::create();
    return m_factoryBackend.get();
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}
#endif

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void PageGroup::addUserScriptToWorld(DOMWrapperWorld* world, const String& source, const KURL& url,
                                     PassOwnPtr<Vector<String> > whitelist, PassOwnPtr<Vector<String> > blacklist,
                                     UserScriptInjectionTime injectionTime, UserContentInjectedFrames injectedFrames)
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{
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    ASSERT_ARG(world, world);

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    OwnPtr<UserScript> userScript = adoptPtr(new UserScript(source, url, whitelist, blacklist, injectionTime, injectedFrames));
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    if (!m_userScripts)
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        m_userScripts = adoptPtr(new UserScriptMap);
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    UserScriptVector*& scriptsInWorld = m_userScripts->add(world, 0).first->second;
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    if (!scriptsInWorld)
        scriptsInWorld = new UserScriptVector;
    scriptsInWorld->append(userScript.release());
}

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void PageGroup::addUserStyleSheetToWorld(DOMWrapperWorld* world, const String& source, const KURL& url,
                                         PassOwnPtr<Vector<String> > whitelist, PassOwnPtr<Vector<String> > blacklist,
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                                         UserContentInjectedFrames injectedFrames,
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                                         UserStyleLevel level,
                                         UserStyleInjectionTime injectionTime)
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{
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    ASSERT_ARG(world, world);

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    OwnPtr<UserStyleSheet> userStyleSheet = adoptPtr(new UserStyleSheet(source, url, whitelist, blacklist, injectedFrames, level));
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    if (!m_userStyleSheets)
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        m_userStyleSheets = adoptPtr(new UserStyleSheetMap);
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    UserStyleSheetVector*& styleSheetsInWorld = m_userStyleSheets->add(world, 0).first->second;
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    if (!styleSheetsInWorld)
        styleSheetsInWorld = new UserStyleSheetVector;
    styleSheetsInWorld->append(userStyleSheet.release());
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    if (injectionTime == InjectInExistingDocuments)
        resetUserStyleCacheInAllFrames();
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}
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void PageGroup::removeUserScriptFromWorld(DOMWrapperWorld* world, const KURL& url)
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{
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    ASSERT_ARG(world, world);

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    if (!m_userScripts)
        return;

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    UserScriptMap::iterator it = m_userScripts->find(world);
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    if (it == m_userScripts->end())
        return;
    
    UserScriptVector* scripts = it->second;
    for (int i = scripts->size() - 1; i >= 0; --i) {
        if (scripts->at(i)->url() == url)
            scripts->remove(i);
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    }
    
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    if (!scripts->isEmpty())
        return;
    
    delete it->second;
    m_userScripts->remove(it);
}

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void PageGroup::removeUserStyleSheetFromWorld(DOMWrapperWorld* world, const KURL& url)
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{
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    ASSERT_ARG(world, world);

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    if (!m_userStyleSheets)
        return;

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    UserStyleSheetMap::iterator it = m_userStyleSheets->find(world);
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    bool sheetsChanged = false;
    if (it == m_userStyleSheets->end())
        return;
    
    UserStyleSheetVector* stylesheets = it->second;
    for (int i = stylesheets->size() - 1; i >= 0; --i) {
        if (stylesheets->at(i)->url() == url) {
            stylesheets->remove(i);
            sheetsChanged = true;
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        }
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    }
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    if (!sheetsChanged)
        return;

    if (!stylesheets->isEmpty()) {
        delete it->second;
        m_userStyleSheets->remove(it);
    }
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    resetUserStyleCacheInAllFrames();
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}

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void PageGroup::removeUserScriptsFromWorld(DOMWrapperWorld* world)
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{
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    ASSERT_ARG(world, world);

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    if (!m_userScripts)
        return;

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    UserScriptMap::iterator it = m_userScripts->find(world);
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    if (it == m_userScripts->end())
        return;
       
    delete it->second;
    m_userScripts->remove(it);
}

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void PageGroup::removeUserStyleSheetsFromWorld(DOMWrapperWorld* world)
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{
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    ASSERT_ARG(world, world);

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    if (!m_userStyleSheets)
        return;
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    UserStyleSheetMap::iterator it = m_userStyleSheets->find(world);
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    if (it == m_userStyleSheets->end())
        return;
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    delete it->second;
    m_userStyleSheets->remove(it);

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    resetUserStyleCacheInAllFrames();
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}

void PageGroup::removeAllUserContent()
{
    if (m_userScripts) {
        deleteAllValues(*m_userScripts);
        m_userScripts.clear();
    }
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    if (m_userStyleSheets) {
        deleteAllValues(*m_userStyleSheets);
        m_userStyleSheets.clear();
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        resetUserStyleCacheInAllFrames();
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    }
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}

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void PageGroup::resetUserStyleCacheInAllFrames()
{
    // Clear our cached sheets and have them just reparse.
    HashSet<Page*>::const_iterator end = m_pages.end();
    for (HashSet<Page*>::const_iterator it = m_pages.begin(); it != end; ++it) {
        for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree()->traverseNext())
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            frame->document()->updatePageGroupUserSheets();
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    }
}

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} // namespace WebCore