C++ AtomicString函数代码示例

void FrameTree::clearName()
{
    m_name = AtomicString();
}

void ResourceRequest::setHTTPHeaderField(const char* name, const AtomicString& value)
{
    setHTTPHeaderField(AtomicString(name), value);
}

AtomicString v8NonStringValueToAtomicWebCoreString(v8::Handle<v8::Value> object)
{
    ASSERT(!object->IsString());
    return AtomicString(v8NonStringValueToWebCoreString(object));
}

JSValue JSDOMWindow::open(ExecState* exec, const ArgList& args)
{
    Frame* frame = impl()->frame();
    if (!frame)
        return jsUndefined();
    Frame* lexicalFrame = toLexicalFrame(exec);
    if (!lexicalFrame)
        return jsUndefined();
    Frame* dynamicFrame = toDynamicFrame(exec);
    if (!dynamicFrame)
        return jsUndefined();

    Page* page = frame->page();

    String urlString = valueToStringWithUndefinedOrNullCheck(exec, args.at(0));
    AtomicString frameName = args.at(1).isUndefinedOrNull() ? "_blank" : AtomicString(args.at(1).toString(exec));

    // Because FrameTree::find() returns true for empty strings, we must check for empty framenames.
    // Otherwise, illegitimate window.open() calls with no name will pass right through the popup blocker.
    if (!DOMWindow::allowPopUp(dynamicFrame) && (frameName.isEmpty() || !frame->tree()->find(frameName)))
        return jsUndefined();

    // Get the target frame for the special cases of _top and _parent.  In those
    // cases, we can schedule a location change right now and return early.
    bool topOrParent = false;
    if (frameName == "_top") {
        frame = frame->tree()->top();
        topOrParent = true;
    } else if (frameName == "_parent") {
        if (Frame* parent = frame->tree()->parent())
            frame = parent;
        topOrParent = true;
    }
    if (topOrParent) {
        if (!shouldAllowNavigation(exec, frame))
            return jsUndefined();

        String completedURL;
        if (!urlString.isEmpty())
            completedURL = completeURL(exec, urlString).string();

        const JSDOMWindow* targetedWindow = toJSDOMWindow(frame);
        if (!completedURL.isEmpty() && (!protocolIsJavaScript(completedURL) || (targetedWindow && targetedWindow->allowsAccessFrom(exec)))) {
            bool userGesture = processingUserGesture(exec);

            // For whatever reason, Firefox uses the dynamicGlobalObject to
            // determine the outgoingReferrer.  We replicate that behavior
            // here.
            String referrer = dynamicFrame->loader()->outgoingReferrer();

            frame->loader()->scheduleLocationChange(completedURL, referrer, !lexicalFrame->script()->anyPageIsProcessingUserGesture(), false, userGesture);
        }
        return toJS(exec, frame->domWindow());
    }

    // In the case of a named frame or a new window, we'll use the createWindow() helper
    WindowFeatures windowFeatures(valueToStringWithUndefinedOrNullCheck(exec, args.at(2)));
    FloatRect windowRect(windowFeatures.xSet ? windowFeatures.x : 0, windowFeatures.ySet ? windowFeatures.y : 0,
                         windowFeatures.widthSet ? windowFeatures.width : 0, windowFeatures.heightSet ? windowFeatures.height : 0);
    DOMWindow::adjustWindowRect(screenAvailableRect(page ? page->mainFrame()->view() : 0), windowRect, windowRect);

    windowFeatures.x = windowRect.x();
    windowFeatures.y = windowRect.y();
    windowFeatures.height = windowRect.height();
    windowFeatures.width = windowRect.width();

    frame = createWindow(exec, lexicalFrame, dynamicFrame, frame, urlString, frameName, windowFeatures, JSValue());

    if (!frame)
        return jsUndefined();

    return toJS(exec, frame->domWindow());
}

inline SVGElement* SVGSMILElement::eventBaseFor(const Condition& condition)
{
    Element* eventBase = condition.baseID().isEmpty() ? targetElement() : treeScope().getElementById(AtomicString(condition.baseID()));
    if (eventBase && eventBase->isSVGElement())
        return toSVGElement(eventBase);
    return nullptr;
}

bool SVGImage::dataChanged(bool allDataReceived)
{
    TRACE_EVENT0("blink", "SVGImage::dataChanged");

    // Don't do anything if is an empty image.
    if (!data()->size())
        return true;

    if (allDataReceived) {
        // SVGImage will fire events (and the default C++ handlers run) but doesn't
        // actually allow script to run so it's fine to call into it. We allow this
        // since it means an SVG data url can synchronously load like other image
        // types.
        EventDispatchForbiddenScope::AllowUserAgentEvents allowUserAgentEvents;

        DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<FrameLoaderClient>, dummyFrameLoaderClient, (EmptyFrameLoaderClient::create()));

        if (m_page) {
            toLocalFrame(m_page->mainFrame())->loader().load(FrameLoadRequest(0, blankURL(), SubstituteData(data(), AtomicString("image/svg+xml", AtomicString::ConstructFromLiteral),
                AtomicString("UTF-8", AtomicString::ConstructFromLiteral), KURL(), ForceSynchronousLoad)));
            return true;
        }

        Page::PageClients pageClients;
        fillWithEmptyClients(pageClients);
        m_chromeClient = SVGImageChromeClient::create(this);
        pageClients.chromeClient = m_chromeClient.get();

        // FIXME: If this SVG ends up loading itself, we might leak the world.
        // The Cache code does not know about ImageResources holding Frames and
        // won't know to break the cycle.
        // This will become an issue when SVGImage will be able to load other
        // SVGImage objects, but we're safe now, because SVGImage can only be
        // loaded by a top-level document.
        OwnPtrWillBeRawPtr<Page> page;
        {
            TRACE_EVENT0("blink", "SVGImage::dataChanged::createPage");
            page = adoptPtrWillBeNoop(new Page(pageClients));
            page->settings().setScriptEnabled(false);
            page->settings().setPluginsEnabled(false);
            page->settings().setAcceleratedCompositingEnabled(false);

            // Because this page is detached, it can't get default font settings
            // from the embedder. Copy over font settings so we have sensible
            // defaults. These settings are fixed and will not update if changed.
            if (!Page::ordinaryPages().isEmpty()) {
                Settings& defaultSettings = (*Page::ordinaryPages().begin())->settings();
                page->settings().genericFontFamilySettings() = defaultSettings.genericFontFamilySettings();
                page->settings().setMinimumFontSize(defaultSettings.minimumFontSize());
                page->settings().setMinimumLogicalFontSize(defaultSettings.minimumLogicalFontSize());
                page->settings().setDefaultFontSize(defaultSettings.defaultFontSize());
                page->settings().setDefaultFixedFontSize(defaultSettings.defaultFixedFontSize());
            }
        }

        RefPtrWillBeRawPtr<LocalFrame> frame = nullptr;
        {
            TRACE_EVENT0("blink", "SVGImage::dataChanged::createFrame");
            frame = LocalFrame::create(dummyFrameLoaderClient.get(), &page->frameHost(), 0);
            frame->setView(FrameView::create(frame.get()));
            frame->init();
        }

        FrameLoader& loader = frame->loader();
        loader.forceSandboxFlags(SandboxAll);

        frame->view()->setScrollbarsSuppressed(true);
        frame->view()->setCanHaveScrollbars(false); // SVG Images will always synthesize a viewBox, if it's not available, and thus never see scrollbars.
        frame->view()->setTransparent(true); // SVG Images are transparent.

        m_page = page.release();

        TRACE_EVENT0("blink", "SVGImage::dataChanged::load");
        loader.load(FrameLoadRequest(0, blankURL(), SubstituteData(data(), AtomicString("image/svg+xml", AtomicString::ConstructFromLiteral),
            AtomicString("UTF-8", AtomicString::ConstructFromLiteral), KURL(), ForceSynchronousLoad)));

        // Set the intrinsic size before a container size is available.
        m_intrinsicSize = containerSize();
    }

    return m_page;
}

FilterOperations FilterOperationResolver::createFilterOperations(StyleResolverState& state, const CSSValue& inValue)
{
    FilterOperations operations;

    if (inValue.isPrimitiveValue()) {
        ASSERT(toCSSPrimitiveValue(inValue).getValueID() == CSSValueNone);
        return operations;
    }

    const CSSToLengthConversionData& conversionData = state.cssToLengthConversionData();
    for (auto& currValue : toCSSValueList(inValue)) {
        CSSFunctionValue* filterValue = toCSSFunctionValue(currValue.get());
        FilterOperation::OperationType operationType = filterOperationForType(filterValue->functionType());
        countFilterUse(operationType, state.document());
        ASSERT(filterValue->length() <= 1);

        if (operationType == FilterOperation::REFERENCE) {
            CSSSVGDocumentValue* svgDocumentValue = toCSSSVGDocumentValue(filterValue->item(0));
            KURL url = state.document().completeURL(svgDocumentValue->url());

            RawPtr<ReferenceFilterOperation> operation = ReferenceFilterOperation::create(svgDocumentValue->url(), AtomicString(url.fragmentIdentifier()));
            if (SVGURIReference::isExternalURIReference(svgDocumentValue->url(), state.document())) {
                if (!svgDocumentValue->loadRequested())
                    state.elementStyleResources().addPendingSVGDocument(operation.get(), svgDocumentValue);
                else if (svgDocumentValue->cachedSVGDocument())
                    ReferenceFilterBuilder::setDocumentResourceReference(operation.get(), adoptPtr(new DocumentResourceReference(svgDocumentValue->cachedSVGDocument())));
            }
            operations.operations().append(operation);
            continue;
        }

        CSSPrimitiveValue* firstValue = filterValue->length() && filterValue->item(0)->isPrimitiveValue() ? toCSSPrimitiveValue(filterValue->item(0)) : nullptr;
        switch (filterValue->functionType()) {
        case CSSValueGrayscale:
        case CSSValueSepia:
        case CSSValueSaturate: {
            double amount = 1;
            if (filterValue->length() == 1) {
                amount = firstValue->getDoubleValue();
                if (firstValue->isPercentage())
                    amount /= 100;
            }

            operations.operations().append(BasicColorMatrixFilterOperation::create(amount, operationType));
            break;
        }
        case CSSValueHueRotate: {
            double angle = 0;
            if (filterValue->length() == 1)
                angle = firstValue->computeDegrees();

            operations.operations().append(BasicColorMatrixFilterOperation::create(angle, operationType));
            break;
        }
        case CSSValueInvert:
        case CSSValueBrightness:
        case CSSValueContrast:
        case CSSValueOpacity: {
            double amount = (filterValue->functionType() == CSSValueBrightness) ? 0 : 1;
            if (filterValue->length() == 1) {
                amount = firstValue->getDoubleValue();
                if (firstValue->isPercentage())
                    amount /= 100;
            }

            operations.operations().append(BasicComponentTransferFilterOperation::create(amount, operationType));
            break;
        }
        case CSSValueBlur: {
            Length stdDeviation = Length(0, Fixed);
            if (filterValue->length() >= 1)
                stdDeviation = firstValue->convertToLength(conversionData);
            operations.operations().append(BlurFilterOperation::create(stdDeviation));
            break;
        }
        case CSSValueDropShadow: {
            CSSShadowValue* item = toCSSShadowValue(filterValue->item(0));
            IntPoint location(item->x->computeLength<int>(conversionData), item->y->computeLength<int>(conversionData));
            int blur = item->blur ? item->blur->computeLength<int>(conversionData) : 0;
            Color shadowColor = Color::black;
            if (item->color)
                shadowColor = state.document().textLinkColors().colorFromCSSValue(*item->color, state.style()->color());

            operations.operations().append(DropShadowFilterOperation::create(location, blur, shadowColor));
            break;
        }
        default:
            ASSERT_NOT_REACHED();
            break;
        }
    }

    return operations;
}

// Given the desired base font, this will create a SimpleFontData for a specific
// font that can be used to render the given range of characters.
PassRefPtr<SimpleFontData> FontCache::platformFallbackForCharacter(const FontDescription& fontDescription, UChar32 c, const SimpleFontData*, bool)
{
    // FIXME: We should fix getFallbackFamily to take a UChar32
    // and remove this split-to-UChar16 code.
    UChar codeUnits[2];
    int codeUnitsLength;
    if (inputC <= 0xFFFF) {
        codeUnits[0] = inputC;
        codeUnitsLength = 1;
    } else {
        codeUnits[0] = U16_LEAD(inputC);
        codeUnits[1] = U16_TRAIL(inputC);
        codeUnitsLength = 2;
    }

    // FIXME: Consider passing fontDescription.dominantScript()
    // to GetFallbackFamily here.
    FontDescription fontDescription = fontDescription;
    UChar32 c;
    UScriptCode script;
    const wchar_t* family = getFallbackFamily(codeUnits, codeUnitsLength, fontDescription.genericFamily(), &c, &script);
    FontPlatformData* data = 0;
    if (family)
        data = getFontPlatformData(fontDescription,  AtomicString(family, wcslen(family)));

    // Last resort font list : PanUnicode. CJK fonts have a pretty
    // large repertoire. Eventually, we need to scan all the fonts
    // on the system to have a Firefox-like coverage.
    // Make sure that all of them are lowercased.
    const static wchar_t* const cjkFonts[] = {
        L"arial unicode ms",
        L"ms pgothic",
        L"simsun",
        L"gulim",
        L"pmingliu",
        L"wenquanyi zen hei", // partial CJK Ext. A coverage but more
                              // widely known to Chinese users.
        L"ar pl shanheisun uni",
        L"ar pl zenkai uni",
        L"han nom a",  // Complete CJK Ext. A coverage
        L"code2000",   // Complete CJK Ext. A coverage
        // CJK Ext. B fonts are not listed here because it's of no use
        // with our current non-BMP character handling because we use
        // Uniscribe for it and that code path does not go through here.
    };

    const static wchar_t* const commonFonts[] = {
        L"tahoma",
        L"arial unicode ms",
        L"lucida sans unicode",
        L"microsoft sans serif",
        L"palatino linotype",
        // Six fonts below (and code2000 at the end) are not from MS, but
        // once installed, cover a very wide range of characters.
        L"dejavu serif",
        L"dejavu sasns",
        L"freeserif",
        L"freesans",
        L"gentium",
        L"gentiumalt",
        L"ms pgothic",
        L"simsun",
        L"gulim",
        L"pmingliu",
        L"code2000",
    };

    const wchar_t* const* panUniFonts = 0;
    int numFonts = 0;
    if (script == USCRIPT_HAN) {
        panUniFonts = cjkFonts;
        numFonts = WTF_ARRAY_LENGTH(cjkFonts);
    } else {
        panUniFonts = commonFonts;
        numFonts = WTF_ARRAY_LENGTH(commonFonts);
    }
    // Font returned from GetFallbackFamily may not cover |characters|
    // because it's based on script to font mapping. This problem is
    // critical enough for non-Latin scripts (especially Han) to
    // warrant an additional (real coverage) check with fontCotainsCharacter.
    int i;
    for (i = 0; (!data || !fontContainsCharacter(data, family, c)) && i < numFonts; ++i) {
        family = panUniFonts[i];
        data = getFontPlatformData(fontDescription, AtomicString(family, wcslen(family)));
    }
    // When i-th font (0-base) in |panUniFonts| contains a character and
    // we get out of the loop, |i| will be |i + 1|. That is, if only the
    // last font in the array covers the character, |i| will be numFonts.
    // So, we have to use '<=" rather than '<' to see if we found a font
    // covering the character.
    if (i <= numFonts)
        return fontDataFromPlatformData(data, DoNotRetain);

    return 0;

}

 FontPlatformDataCacheKey(const AtomicString& family = AtomicString(), unsigned size = 0, bool bold = false, bool italic = false)
 :m_family(family), m_size(size), m_bold(bold), m_italic(italic)
 {}

void HTMLSourceElement::setSrc(const String& url)
{
    setAttribute(srcAttr, AtomicString(url));
}

WheelEvent::WheelEvent()
    : WheelEvent(AtomicString(), WheelEventInit())
{
}

TEST(ResourceRequestTest, CrossThreadResourceRequestData)
{
    ResourceRequest original;
    original.setURL(KURL(ParsedURLString, "http://www.example.com/test.htm"));
    original.setCachePolicy(UseProtocolCachePolicy);
    original.setTimeoutInterval(10);
    original.setFirstPartyForCookies(KURL(ParsedURLString, "http://www.example.com/first_party.htm"));
    original.setRequestorOrigin(SecurityOrigin::create(KURL(ParsedURLString, "http://www.example.com/first_party.htm")));
    original.setHTTPMethod(HTTPNames::GET);
    original.setHTTPHeaderField(AtomicString("Foo"), AtomicString("Bar"));
    original.setHTTPHeaderField(AtomicString("Piyo"), AtomicString("Fuga"));
    original.setPriority(ResourceLoadPriorityLow, 20);

    RefPtr<EncodedFormData> originalBody(EncodedFormData::create("Test Body"));
    original.setHTTPBody(originalBody);
    original.setAllowStoredCredentials(false);
    original.setReportUploadProgress(false);
    original.setHasUserGesture(false);
    original.setDownloadToFile(false);
    original.setSkipServiceWorker(false);
    original.setFetchRequestMode(WebURLRequest::FetchRequestModeCORS);
    original.setFetchCredentialsMode(WebURLRequest::FetchCredentialsModeSameOrigin);
    original.setRequestorID(30);
    original.setRequestorProcessID(40);
    original.setAppCacheHostID(50);
    original.setRequestContext(WebURLRequest::RequestContextAudio);
    original.setFrameType(WebURLRequest::FrameTypeNested);
    original.setHTTPReferrer(Referrer("http://www.example.com/referrer.htm", ReferrerPolicyDefault));

    EXPECT_STREQ("http://www.example.com/test.htm", original.url().getString().utf8().data());
    EXPECT_EQ(UseProtocolCachePolicy, original.getCachePolicy());
    EXPECT_EQ(10, original.timeoutInterval());
    EXPECT_STREQ("http://www.example.com/first_party.htm", original.firstPartyForCookies().getString().utf8().data());
    EXPECT_STREQ("www.example.com", original.requestorOrigin()->host().utf8().data());
    EXPECT_STREQ("GET", original.httpMethod().utf8().data());
    EXPECT_STREQ("Bar", original.httpHeaderFields().get("Foo").utf8().data());
    EXPECT_STREQ("Fuga", original.httpHeaderFields().get("Piyo").utf8().data());
    EXPECT_EQ(ResourceLoadPriorityLow, original.priority());
    EXPECT_STREQ("Test Body", original.httpBody()->flattenToString().utf8().data());
    EXPECT_FALSE(original.allowStoredCredentials());
    EXPECT_FALSE(original.reportUploadProgress());
    EXPECT_FALSE(original.hasUserGesture());
    EXPECT_FALSE(original.downloadToFile());
    EXPECT_FALSE(original.skipServiceWorker());
    EXPECT_EQ(WebURLRequest::FetchRequestModeCORS, original.fetchRequestMode());
    EXPECT_EQ(WebURLRequest::FetchCredentialsModeSameOrigin, original.fetchCredentialsMode());
    EXPECT_EQ(30, original.requestorID());
    EXPECT_EQ(40, original.requestorProcessID());
    EXPECT_EQ(50, original.appCacheHostID());
    EXPECT_EQ(WebURLRequest::RequestContextAudio, original.requestContext());
    EXPECT_EQ(WebURLRequest::FrameTypeNested, original.frameType());
    EXPECT_STREQ("http://www.example.com/referrer.htm", original.httpReferrer().utf8().data());
    EXPECT_EQ(ReferrerPolicyDefault, original.getReferrerPolicy());

    OwnPtr<CrossThreadResourceRequestData> data1(original.copyData());
    ResourceRequest copy1(data1.get());

    EXPECT_STREQ("http://www.example.com/test.htm", copy1.url().getString().utf8().data());
    EXPECT_EQ(UseProtocolCachePolicy, copy1.getCachePolicy());
    EXPECT_EQ(10, copy1.timeoutInterval());
    EXPECT_STREQ("http://www.example.com/first_party.htm", copy1.firstPartyForCookies().getString().utf8().data());
    EXPECT_STREQ("www.example.com", copy1.requestorOrigin()->host().utf8().data());
    EXPECT_STREQ("GET", copy1.httpMethod().utf8().data());
    EXPECT_STREQ("Bar", copy1.httpHeaderFields().get("Foo").utf8().data());
    EXPECT_EQ(ResourceLoadPriorityLow, copy1.priority());
    EXPECT_STREQ("Test Body", copy1.httpBody()->flattenToString().utf8().data());
    EXPECT_FALSE(copy1.allowStoredCredentials());
    EXPECT_FALSE(copy1.reportUploadProgress());
    EXPECT_FALSE(copy1.hasUserGesture());
    EXPECT_FALSE(copy1.downloadToFile());
    EXPECT_FALSE(copy1.skipServiceWorker());
    EXPECT_EQ(WebURLRequest::FetchRequestModeCORS, copy1.fetchRequestMode());
    EXPECT_EQ(WebURLRequest::FetchCredentialsModeSameOrigin, copy1.fetchCredentialsMode());
    EXPECT_EQ(30, copy1.requestorID());
    EXPECT_EQ(40, copy1.requestorProcessID());
    EXPECT_EQ(50, copy1.appCacheHostID());
    EXPECT_EQ(WebURLRequest::RequestContextAudio, copy1.requestContext());
    EXPECT_EQ(WebURLRequest::FrameTypeNested, copy1.frameType());
    EXPECT_STREQ("http://www.example.com/referrer.htm", copy1.httpReferrer().utf8().data());
    EXPECT_EQ(ReferrerPolicyDefault, copy1.getReferrerPolicy());

    copy1.setAllowStoredCredentials(true);
    copy1.setReportUploadProgress(true);
    copy1.setHasUserGesture(true);
    copy1.setDownloadToFile(true);
    copy1.setSkipServiceWorker(true);
    copy1.setFetchRequestMode(WebURLRequest::FetchRequestModeNoCORS);
    copy1.setFetchCredentialsMode(WebURLRequest::FetchCredentialsModeInclude);

    OwnPtr<CrossThreadResourceRequestData> data2(copy1.copyData());
    ResourceRequest copy2(data2.get());
    EXPECT_TRUE(copy2.allowStoredCredentials());
    EXPECT_TRUE(copy2.reportUploadProgress());
    EXPECT_TRUE(copy2.hasUserGesture());
    EXPECT_TRUE(copy2.downloadToFile());
    EXPECT_TRUE(copy2.skipServiceWorker());
    EXPECT_EQ(WebURLRequest::FetchRequestModeNoCORS, copy1.fetchRequestMode());
    EXPECT_EQ(WebURLRequest::FetchCredentialsModeInclude, copy1.fetchCredentialsMode());
}

const AtomicString DOMSettableTokenList::item(unsigned index) const
{
    if (index >= length())
        return AtomicString();
    return m_tokens[index];
}

void createQualifiedName(void* targetAddress, StringImpl* name)
{
    new (NotNull, reinterpret_cast<void*>(targetAddress)) QualifiedName(nullAtom, AtomicString(name), nullAtom);
}

void DOMSettableTokenList::remove(const Vector<String>& tokens, ExceptionState& exceptionState)
{
    DOMTokenList::remove(tokens, exceptionState);
    for (size_t i = 0; i < tokens.size(); ++i)
        m_tokens.remove(AtomicString(tokens[i]));
}