page.cpp

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C++ 代码 · 共 653 行 · 第 1/2 页

    }

    return false;
}

unsigned int Page::markAllMatchesForText(const String& target, TextCaseSensitivity caseSensitivity, bool shouldHighlight, unsigned limit)
{
    if (target.isEmpty() || !mainFrame())
        return 0;

    unsigned matches = 0;

    Frame* frame = mainFrame();
    do {
        frame->setMarkedTextMatchesAreHighlighted(shouldHighlight);
        matches += frame->markAllMatchesForText(target, caseSensitivity == TextCaseSensitive, (limit == 0) ? 0 : (limit - matches));
        frame = incrementFrame(frame, true, false);
    } while (frame);

    return matches;
}

void Page::unmarkAllTextMatches()
{
    if (!mainFrame())
        return;

    Frame* frame = mainFrame();
    do {
        frame->document()->removeMarkers(DocumentMarker::TextMatch);
        frame = incrementFrame(frame, true, false);
    } while (frame);
}

const VisibleSelection& Page::selection() const
{
    return focusController()->focusedOrMainFrame()->selection()->selection();
}

void Page::setDefersLoading(bool defers)
{
    if (defers == m_defersLoading)
        return;

    m_defersLoading = defers;
    for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext())
        frame->loader()->setDefersLoading(defers);
}

void Page::clearUndoRedoOperations()
{
    m_editorClient->clearUndoRedoOperations();
}

bool Page::inLowQualityImageInterpolationMode() const
{
    return m_inLowQualityInterpolationMode;
}

void Page::setInLowQualityImageInterpolationMode(bool mode)
{
    m_inLowQualityInterpolationMode = mode;
}

void Page::setMediaVolume(float volume)
{
    if (volume < 0 || volume > 1)
        return;

    if (m_mediaVolume == volume)
        return;

    m_mediaVolume = volume;
    for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext()) {
        frame->document()->mediaVolumeDidChange();
    }
}

void Page::didMoveOnscreen()
{
    for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext()) {
        if (frame->view())
            frame->view()->didMoveOnscreen();
    }
}

void Page::willMoveOffscreen()
{
    for (Frame* frame = mainFrame(); frame; frame = frame->tree()->traverseNext()) {
        if (frame->view())
            frame->view()->willMoveOffscreen();
    }
}

void Page::userStyleSheetLocationChanged()
{
#if !FRAME_LOADS_USER_STYLESHEET
    // FIXME: We should provide a way to load other types of URLs than just
    // file: (e.g., http:, data:).
    if (m_settings->userStyleSheetLocation().isLocalFile())
        m_userStyleSheetPath = m_settings->userStyleSheetLocation().fileSystemPath();
    else
        m_userStyleSheetPath = String();

    m_didLoadUserStyleSheet = false;
    m_userStyleSheet = String();
    m_userStyleSheetModificationTime = 0;
#endif
}

const String& Page::userStyleSheet() const
{
    if (m_userStyleSheetPath.isEmpty()) {
        ASSERT(m_userStyleSheet.isEmpty());
        return m_userStyleSheet;
    }

    time_t modTime;
    if (!getFileModificationTime(m_userStyleSheetPath, modTime)) {
        // The stylesheet either doesn't exist, was just deleted, or is
        // otherwise unreadable. If we've read the stylesheet before, we should
        // throw away that data now as it no longer represents what's on disk.
        m_userStyleSheet = String();
        return m_userStyleSheet;
    }

    // If the stylesheet hasn't changed since the last time we read it, we can
    // just return the old data.
    if (m_didLoadUserStyleSheet && modTime <= m_userStyleSheetModificationTime)
        return m_userStyleSheet;

    m_didLoadUserStyleSheet = true;
    m_userStyleSheet = String();
    m_userStyleSheetModificationTime = modTime;

    // FIXME: It would be better to load this asynchronously to avoid blocking
    // the process, but we will first need to create an asynchronous loading
    // mechanism that is not tied to a particular Frame. We will also have to
    // determine what our behavior should be before the stylesheet is loaded
    // and what should happen when it finishes loading, especially with respect
    // to when the load event fires, when Document::close is called, and when
    // layout/paint are allowed to happen.
    RefPtr<SharedBuffer> data = SharedBuffer::createWithContentsOfFile(m_userStyleSheetPath);
    if (!data)
        return m_userStyleSheet;

    m_userStyleSheet = TextResourceDecoder::create("text/css")->decode(data->data(), data->size());

    return m_userStyleSheet;
}

void Page::removeAllVisitedLinks()
{
    if (!allPages)
        return;
    HashSet<PageGroup*> groups;
    HashSet<Page*>::iterator pagesEnd = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != pagesEnd; ++it) {
        if (PageGroup* group = (*it)->groupPtr())
            groups.add(group);
    }
    HashSet<PageGroup*>::iterator groupsEnd = groups.end();
    for (HashSet<PageGroup*>::iterator it = groups.begin(); it != groupsEnd; ++it)
        (*it)->removeVisitedLinks();
}

void Page::allVisitedStateChanged(PageGroup* group)
{
    ASSERT(group);
    ASSERT(allPages);
    HashSet<Page*>::iterator pagesEnd = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != pagesEnd; ++it) {
        Page* page = *it;
        if (page->m_group != group)
            continue;
        for (Frame* frame = page->m_mainFrame.get(); frame; frame = frame->tree()->traverseNext()) {
            if (CSSStyleSelector* styleSelector = frame->document()->styleSelector())
                styleSelector->allVisitedStateChanged();
        }
    }
}

void Page::visitedStateChanged(PageGroup* group, LinkHash visitedLinkHash)
{
    ASSERT(group);
    ASSERT(allPages);
    HashSet<Page*>::iterator pagesEnd = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != pagesEnd; ++it) {
        Page* page = *it;
        if (page->m_group != group)
            continue;
        for (Frame* frame = page->m_mainFrame.get(); frame; frame = frame->tree()->traverseNext()) {
            if (CSSStyleSelector* styleSelector = frame->document()->styleSelector())
                styleSelector->visitedStateChanged(visitedLinkHash);
        }
    }
}

void Page::setDebuggerForAllPages(JSC::Debugger* debugger)
{
    ASSERT(allPages);

    HashSet<Page*>::iterator end = allPages->end();
    for (HashSet<Page*>::iterator it = allPages->begin(); it != end; ++it)
        (*it)->setDebugger(debugger);
}

void Page::setDebugger(JSC::Debugger* debugger)
{
    if (m_debugger == debugger)
        return;

    m_debugger = debugger;

    for (Frame* frame = m_mainFrame.get(); frame; frame = frame->tree()->traverseNext())
        frame->script()->attachDebugger(m_debugger);
}

#if ENABLE(DOM_STORAGE)
SessionStorage* Page::sessionStorage(bool optionalCreate)
{
    if (!m_sessionStorage && optionalCreate)
        m_sessionStorage = SessionStorage::create(this);

    return m_sessionStorage.get();
}

void Page::setSessionStorage(PassRefPtr<SessionStorage> newStorage)
{
    ASSERT(newStorage->page() == this);
    m_sessionStorage = newStorage;
}
#endif
    
unsigned Page::pendingUnloadEventCount()
{
    return m_pendingUnloadEventCount;
}
    
void Page::changePendingUnloadEventCount(int delta) 
{
    if (!delta)
        return;
    ASSERT( (delta + (int)m_pendingUnloadEventCount) >= 0 );
    
    if (m_pendingUnloadEventCount == 0)
        m_chrome->disableSuddenTermination();
    else if ((m_pendingUnloadEventCount + delta) == 0)
        m_chrome->enableSuddenTermination();
    
    m_pendingUnloadEventCount += delta;
    return; 
}
    
unsigned Page::pendingBeforeUnloadEventCount()
{
    return m_pendingBeforeUnloadEventCount;
}
    
void Page::changePendingBeforeUnloadEventCount(int delta) 
{
    if (!delta)
        return;
    ASSERT( (delta + (int)m_pendingBeforeUnloadEventCount) >= 0 );
    
    if (m_pendingBeforeUnloadEventCount == 0)
        m_chrome->disableSuddenTermination();
    else if ((m_pendingBeforeUnloadEventCount + delta) == 0)
        m_chrome->enableSuddenTermination();
    
    m_pendingBeforeUnloadEventCount += delta;
    return; 
}

#if ENABLE(WML)
WMLPageState* Page::wmlPageState()
{
    if (!m_wmlPageState)    
        m_wmlPageState.set(new WMLPageState(this));
    return m_wmlPageState.get(); 
}
#endif

void Page::setCustomHTMLTokenizerTimeDelay(double customHTMLTokenizerTimeDelay)
{
    if (customHTMLTokenizerTimeDelay < 0) {
        m_customHTMLTokenizerTimeDelay = -1;
        return;
    }
    m_customHTMLTokenizerTimeDelay = customHTMLTokenizerTimeDelay;
}

void Page::setCustomHTMLTokenizerChunkSize(int customHTMLTokenizerChunkSize)
{
    if (customHTMLTokenizerChunkSize < 0) {
        m_customHTMLTokenizerChunkSize = -1;
        return;
    }
    m_customHTMLTokenizerChunkSize = customHTMLTokenizerChunkSize;
}

void Page::setMemoryCacheClientCallsEnabled(bool enabled)
{
    if (m_areMemoryCacheClientCallsEnabled == enabled)
        return;

    m_areMemoryCacheClientCallsEnabled = enabled;
    if (!enabled)
        return;

    for (RefPtr<Frame> frame = mainFrame(); frame; frame = frame->tree()->traverseNext())
        frame->loader()->tellClientAboutPastMemoryCacheLoads();
}

void Page::setJavaScriptURLsAreAllowed(bool areAllowed)
{
    m_javaScriptURLsAreAllowed = areAllowed;
}

bool Page::javaScriptURLsAreAllowed() const
{
    return m_javaScriptURLsAreAllowed;
}

} // namespace WebCore