C++ AtomicString::characters方法代码示例

static ALWAYS_INLINE void visitedURLInline(const KURL& base, const AtomicString& attributeURL, Vector<UChar, 512>& buffer)
{
    if (attributeURL.isNull())
        return;

    const UChar* characters = attributeURL.characters();
    unsigned length = attributeURL.length();

    // This is a poor man's completeURL. Faster with less memory allocation.
    // FIXME: It's missing a lot of what completeURL does and a lot of what KURL does.
    // For example, it does not handle international domain names properly.

    // FIXME: It is wrong that we do not do further processing on strings that have "://" in them:
    //    1) The "://" could be in the query or anchor.
    //    2) The URL's path could have a "/./" or a "/../" or a "//" sequence in it.

    // FIXME: needsTrailingSlash does not properly return true for a URL that has no path, but does
    // have a query or anchor.

    bool hasColonSlashSlash = containsColonSlashSlash(characters, length);

    if (hasColonSlashSlash && !needsTrailingSlash(characters, length)) {
        buffer.append(attributeURL.characters(), attributeURL.length());
        return;
    }


    if (hasColonSlashSlash) {
        // FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
        // end of the path, *before* the query or anchor.
        buffer.append(characters, length);
        buffer.append('/');
        return;
    }

    if (!length)
        buffer.append(base.string().characters(), base.string().length());
    else {
        switch (characters[0]) {
            case '/':
                buffer.append(base.string().characters(), base.pathStart());
                break;
            case '#':
                buffer.append(base.string().characters(), base.pathEnd());
                break;
            default:
                buffer.append(base.string().characters(), base.pathAfterLastSlash());
                break;
        }
    }
    buffer.append(characters, length);
    cleanPath(buffer);
    if (needsTrailingSlash(buffer.data(), buffer.size())) {
        // FIXME: This is incorrect for URLs that have a query or anchor; the "/" needs to go at the
        // end of the path, *before* the query or anchor.
        buffer.append('/');
    }

    return;
}

BString::BString(const AtomicString& s)
{
    if (s.isNull())
        m_bstr = 0;
    else
        m_bstr = SysAllocStringLen(s.characters(), s.length());
}

LinkHash ChromiumBridge::visitedLinkHash(const KURL& base,
                                         const AtomicString& attributeURL)
{
    // Resolve the relative URL using googleurl and pass the absolute URL up to
    // the embedder. We could create a GURL object from the base and resolve
    // the relative URL that way, but calling the lower-level functions
    // directly saves us the string allocation in most cases.
    url_canon::RawCanonOutput<2048> buffer;
    url_parse::Parsed parsed;

#if USE(GOOGLEURL)
    const CString& cstr = base.utf8String();
    const char* data = cstr.data();
    int length = cstr.length();
    const url_parse::Parsed& srcParsed = base.parsed();
#else
    // When we're not using GoogleURL, first canonicalize it so we can resolve it
    // below.
    url_canon::RawCanonOutput<2048> srcCanon;
    url_parse::Parsed srcParsed;
    String str = base.string();
    if (!url_util::Canonicalize(str.characters(), str.length(), 0, &srcCanon, &srcParsed))
        return 0;
    const char* data = srcCanon.data();
    int length = srcCanon.length();
#endif

    if (!url_util::ResolveRelative(data, length, srcParsed, attributeURL.characters(),
                                   attributeURL.length(), 0, &buffer, &parsed))
        return 0;  // Invalid resolved URL.

    return webKitClient()->visitedLinkHash(buffer.data(), buffer.length());
}

PassRefPtr<FixedSizeFontData> FixedSizeFontData::create(const AtomicString& family, unsigned weight, bool italic)
{
    FixedSizeFontData* fontData = new FixedSizeFontData();

    fontData->m_weight = weight;
    fontData->m_italic = italic;

    LOGFONT& winFont = fontData->m_font;
    // The size here looks unusual.  The negative number is intentional.
    winFont.lfHeight = -72;
    winFont.lfWidth = 0;
    winFont.lfEscapement = 0;
    winFont.lfOrientation = 0;
    winFont.lfUnderline = false;
    winFont.lfStrikeOut = false;
    winFont.lfCharSet = DEFAULT_CHARSET;
    winFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
    winFont.lfQuality = CLEARTYPE_QUALITY; //DEFAULT_QUALITY;
    winFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
    winFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
    winFont.lfItalic = italic;
    winFont.lfWeight = FontPlatformData::adjustedGDIFontWeight(weight, family);

    int len = std::min(family.length(), (unsigned int)LF_FACESIZE - 1);
    wmemcpy(winFont.lfFaceName, family.characters(), len);
    winFont.lfFaceName[len] = L'\0';

    fontData->m_hfont.set(CreateFontIndirect(&winFont));

    HGDIOBJ oldFont = SelectObject(g_screenDC, fontData->m_hfont.get());

    GetTextMetrics(g_screenDC, &fontData->m_metrics);

#if defined(IMLANG_FONT_LINK) && (IMLANG_FONT_LINK == 2)
    if (IMLangFontLink2* langFontLink = fontCache()->getFontLinkInterface()) {
#else
    if (IMLangFontLink* langFontLink = fontCache()->getFontLinkInterface()) {
#endif
        langFontLink->GetFontCodePages(g_screenDC, fontData->m_hfont.get(), &fontData->m_codePages);
        fontData->m_codePages |= FontPlatformData::getKnownFontCodePages(winFont.lfFaceName);
    }

    SelectObject(g_screenDC, oldFont);

    return adoptRef(fontData);
}

static PassRefPtr<FixedSizeFontData> createFixedSizeFontData(const AtomicString& family, unsigned weight, bool italic)
{
    FixedSizeFontDataKey key(family, weight, italic);
    pair<FixedSizeFontCache::iterator, bool> result = g_fixedSizeFontCache.add(key, RefPtr<FixedSizeFontData>());
    if (result.second)
        result.first->second = FixedSizeFontData::create(family, weight, italic);

    return result.first->second;
}

static HFONT createGDIFont(const AtomicString& family, LONG desiredWeight, bool desiredItalic, int size, bool synthesizeItalic)
{
    HDC hdc = GetDC(0);

    LOGFONT logFont;
    logFont.lfCharSet = DEFAULT_CHARSET;
    unsigned familyLength = min(family.length(), static_cast<unsigned>(LF_FACESIZE - 1));
    memcpy(logFont.lfFaceName, family.characters(), familyLength * sizeof(UChar));
    logFont.lfFaceName[familyLength] = 0;
    logFont.lfPitchAndFamily = 0;

    MatchImprovingProcData matchData(desiredWeight, desiredItalic);
    EnumFontFamiliesEx(hdc, &logFont, matchImprovingEnumProc, reinterpret_cast<LPARAM>(&matchData), 0);

    ReleaseDC(0, hdc);

    if (!matchData.m_hasMatched)
        return 0;

    matchData.m_chosen.lfHeight = -size;
    matchData.m_chosen.lfWidth = 0;
    matchData.m_chosen.lfEscapement = 0;
    matchData.m_chosen.lfOrientation = 0;
    matchData.m_chosen.lfUnderline = false;
    matchData.m_chosen.lfStrikeOut = false;
    matchData.m_chosen.lfCharSet = DEFAULT_CHARSET;
#if PLATFORM(CG) || PLATFORM(CAIRO)
    matchData.m_chosen.lfOutPrecision = OUT_TT_ONLY_PRECIS;
#else
    matchData.m_chosen.lfOutPrecision = OUT_TT_PRECIS;
#endif
    matchData.m_chosen.lfQuality = DEFAULT_QUALITY;
    matchData.m_chosen.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;

   if (desiredItalic && !matchData.m_chosen.lfItalic && synthesizeItalic)
       matchData.m_chosen.lfItalic = 1;

    HFONT result = CreateFontIndirect(&matchData.m_chosen);
    if (!result)
        return 0;

    HDC dc = GetDC(0);
    SaveDC(dc);
    SelectObject(dc, result);
    WCHAR actualName[LF_FACESIZE];
    GetTextFace(dc, LF_FACESIZE, actualName);
    RestoreDC(dc, -1);
    ReleaseDC(0, dc);

    if (wcsicmp(matchData.m_chosen.lfFaceName, actualName)) {
        DeleteObject(result);
        result = 0;
    }

    return result;
}

void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
{
    LOGFONT logFont;
    logFont.lfCharSet = DEFAULT_CHARSET;
    unsigned familyLength = std::min(familyName.length(), static_cast<unsigned>(LF_FACESIZE - 1));
    memcpy(logFont.lfFaceName, familyName.characters(), familyLength * sizeof(UChar));
    logFont.lfFaceName[familyLength] = 0;
    logFont.lfPitchAndFamily = 0;

    TraitsInFamilyProcData procData(familyName);
    EnumFontFamiliesEx(g_screenDC, &logFont, traitsInFamilyEnumProc, reinterpret_cast<LPARAM>(&procData), 0);
    copyToVector(procData.m_traitsMasks, traitsMasks);
}

void StyledElement::classAttributeChanged(const AtomicString& newClassString)
{
    const UChar* characters = newClassString.characters();
    unsigned length = newClassString.length();
    unsigned i;
    for (i = 0; i < length; ++i) {
        if (!isClassWhitespace(characters[i]))
            break;
    }
    setHasClass(i < length);
    if (namedAttrMap) {
        if (i < length)
            mappedAttributes()->setClass(newClassString);
        else
            mappedAttributes()->clearClass();
    }
    setNeedsStyleRecalc();
    dispatchSubtreeModifiedEvent();
}

void StyledElement::classAttributeChanged(const AtomicString& newClassString)
{
    const UChar* characters = newClassString.characters();
    unsigned length = newClassString.length();
    unsigned i;
    for (i = 0; i < length; ++i) {
        if (isNotHTMLSpace(characters[i]))
            break;
    }
    bool hasClass = i < length;
    setHasClass(hasClass);
    if (hasClass) {
        attributes()->setClass(newClassString);
        if (DOMTokenList* classList = optionalClassList())
            static_cast<ClassList*>(classList)->reset(newClassString);
    } else if (attributeMap())
        attributeMap()->clearClass();
    setNeedsStyleRecalc();
}

void SVGGlyphRefElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
    const UChar* startPtr = value.characters();
    const UChar* endPtr = startPtr + value.length();

    // FIXME: We need some error handling here.
    if (name == SVGNames::xAttr)
        parseNumber(startPtr, endPtr, m_x);
    else if (name == SVGNames::yAttr)
        parseNumber(startPtr, endPtr, m_y);
    else if (name == SVGNames::dxAttr)
        parseNumber(startPtr, endPtr, m_dx);
    else if (name == SVGNames::dyAttr)
        parseNumber(startPtr, endPtr, m_dy);
    else {
        if (SVGURIReference::parseAttribute(name, value))
            return;
        SVGStyledElement::parseAttribute(name, value);
    }
}

HRESULT STDMETHODCALLTYPE DOMElement::font(WebFontDescription* webFontDescription)
{
    if (!webFontDescription) {
        ASSERT_NOT_REACHED();
        return E_POINTER;
    }

    ASSERT(m_element);

    WebCore::RenderElement* renderer = m_element->renderer();
    if (!renderer)
        return E_FAIL;

    FontDescription fontDescription = renderer->style().font().fontDescription();
    AtomicString family = fontDescription.firstFamily();
    webFontDescription->family = family.characters();
    webFontDescription->familyLength = family.length();
    webFontDescription->size = fontDescription.computedSize();
    webFontDescription->bold = fontDescription.weight() >= WebCore::FontWeight600;
    webFontDescription->italic = fontDescription.italic();

    return S_OK;
}

bool SVGTransformable::parseTransformAttribute(SVGTransformList* list, const AtomicString& transform)
{
    const UChar* start = transform.characters();
    const UChar* end = start + transform.length();
    return parseTransformAttribute(list, start, end);
}

bool SVGTransformable::parseTransformAttribute(SVGTransformList* list, const AtomicString& transform)
{
    double x[] = {0, 0, 0, 0, 0, 0};
    int nr = 0, required = 0, optional = 0;
    
    const UChar* currTransform = transform.characters();
    const UChar* end = currTransform + transform.length();

    bool delimParsed = false;
    while (currTransform < end) {
        delimParsed = false;
        unsigned short type = SVGTransform::SVG_TRANSFORM_UNKNOWN;
        skipOptionalSpaces(currTransform, end);
        
        if (currTransform >= end)
            return false;
        
        if (*currTransform == 's') {
            if (skipString(currTransform, end, skewXDesc, sizeof(skewXDesc) / sizeof(UChar))) {
                required = 1;
                optional = 0;
                type = SVGTransform::SVG_TRANSFORM_SKEWX;
            } else if (skipString(currTransform, end, skewYDesc, sizeof(skewYDesc) / sizeof(UChar))) {
                required = 1;
                optional = 0;
                type = SVGTransform::SVG_TRANSFORM_SKEWY;
            } else if (skipString(currTransform, end, scaleDesc, sizeof(scaleDesc) / sizeof(UChar))) {
                required = 1;
                optional = 1;
                type = SVGTransform::SVG_TRANSFORM_SCALE;
            } else
                return false;
        } else if (skipString(currTransform, end, translateDesc, sizeof(translateDesc) / sizeof(UChar))) {
            required = 1;
            optional = 1;
            type = SVGTransform::SVG_TRANSFORM_TRANSLATE;
        } else if (skipString(currTransform, end, rotateDesc, sizeof(rotateDesc) / sizeof(UChar))) {
            required = 1;
            optional = 2;
            type = SVGTransform::SVG_TRANSFORM_ROTATE;
        } else if (skipString(currTransform, end, matrixDesc, sizeof(matrixDesc) / sizeof(UChar))) {
            required = 6;
            optional = 0;
            type = SVGTransform::SVG_TRANSFORM_MATRIX;
        } else 
            return false;

        if ((nr = parseTransformParamList(currTransform, end, x, required, optional)) < 0)
            return false;

        SVGTransform t;

        switch (type) {
            case SVGTransform::SVG_TRANSFORM_SKEWX:
               t.setSkewX(narrowPrecisionToFloat(x[0]));
                break;
            case SVGTransform::SVG_TRANSFORM_SKEWY:
               t.setSkewY(narrowPrecisionToFloat(x[0]));
                break;
            case SVGTransform::SVG_TRANSFORM_SCALE:
                  if (nr == 1) // Spec: if only one param given, assume uniform scaling
                      t.setScale(narrowPrecisionToFloat(x[0]), narrowPrecisionToFloat(x[0]));
                  else
                      t.setScale(narrowPrecisionToFloat(x[0]), narrowPrecisionToFloat(x[1]));
                break;
            case SVGTransform::SVG_TRANSFORM_TRANSLATE:
                  if (nr == 1) // Spec: if only one param given, assume 2nd param to be 0
                      t.setTranslate(narrowPrecisionToFloat(x[0]), 0);
                  else
                      t.setTranslate(narrowPrecisionToFloat(x[0]), narrowPrecisionToFloat(x[1]));
                break;
            case SVGTransform::SVG_TRANSFORM_ROTATE:
                  if (nr == 1)
                      t.setRotate(narrowPrecisionToFloat(x[0]), 0, 0);
                  else
                      t.setRotate(narrowPrecisionToFloat(x[0]), narrowPrecisionToFloat(x[1]), narrowPrecisionToFloat(x[2]));
                break;
            case SVGTransform::SVG_TRANSFORM_MATRIX:
                t.setMatrix(AffineTransform(x[0], x[1], x[2], x[3], x[4], x[5]));
                break;
        }

        ExceptionCode ec = 0;
        list->appendItem(t, ec);
        skipOptionalSpaces(currTransform, end);
        if (currTransform < end && *currTransform == ',') {
            delimParsed = true;
            currTransform++;
        }
        skipOptionalSpaces(currTransform, end);
    }

    return !delimParsed;
}