C++ CachedImage::url方法代码示例

void PageSerializer::retrieveResourcesForCSSDeclaration(StylePropertySet* styleDeclaration, Document* document)
{
    if (!styleDeclaration)
        return;

    // The background-image and list-style-image (for ul or ol) are the CSS properties
    // that make use of images. We iterate to make sure we include any other
    // image properties there might be.
    unsigned propertyCount = styleDeclaration->propertyCount();
    for (unsigned i = 0; i < propertyCount; ++i) {
        RefPtr<CSSValue> cssValue = styleDeclaration->propertyAt(i).value();
        if (!cssValue->isImageValue())
            continue;

        CSSImageValue* imageValue = static_cast<CSSImageValue*>(cssValue.get());
        StyleImage* styleImage = imageValue->cachedOrPendingImage();
        // Non cached-images are just place-holders and do not contain data.
        if (!styleImage || !styleImage->isCachedImage())
            continue;

        CachedImage* image = static_cast<StyleCachedImage*>(styleImage)->cachedImage();

        KURL url = document->completeURL(image->url());
        addImageToResources(image, 0, url);
    }
}

void DocLoader::setAutoLoadImages(bool enable)
{
    if (enable == m_autoLoadImages)
        return;

    m_autoLoadImages = enable;

    if (!m_autoLoadImages)
        return;

    DocumentResourceMap::iterator end = m_documentResources.end();
    for (DocumentResourceMap::iterator it = m_documentResources.begin(); it != end; ++it) {
        CachedResource* resource = it->second.get();
        if (resource->type() == CachedResource::ImageResource) {
            CachedImage* image = const_cast<CachedImage*>(static_cast<const CachedImage*>(resource));
#ifdef ANDROID_BLOCK_NETWORK_IMAGE
            if (shouldBlockNetworkImage(image->url()))
                continue;
#endif

            if (image->stillNeedsLoad())
                cache()->loader()->load(this, image, true);
        }
    }
}

void PageSerializer::retrieveResourcesForCSSDeclaration(CSSStyleDeclaration* styleDeclaration)
{
    if (!styleDeclaration)
        return;

    if (!styleDeclaration->stylesheet()->isCSSStyleSheet())
        return;

    CSSStyleSheet* cssStyleSheet = static_cast<CSSStyleSheet*>(styleDeclaration->stylesheet());

    // The background-image and list-style-image (for ul or ol) are the CSS properties
    // that make use of images. We iterate to make sure we include any other
    // image properties there might be.
    for (unsigned i = 0; i < styleDeclaration->length(); ++i) {
        // FIXME: It's kind of ridiculous to get the property name and then get
        // the value out of the name. Ideally we would get the value out of the
        // property ID, but CSSStyleDeclaration only gives access to property
        // names, not IDs.
        RefPtr<CSSValue> cssValue = styleDeclaration->getPropertyCSSValue(styleDeclaration->item(i));
        if (!cssValue->isImageValue())
            continue;

        CSSImageValue* imageValue = static_cast<CSSImageValue*>(cssValue.get());
        StyleImage* styleImage = imageValue->cachedOrPendingImage();
        // Non cached-images are just place-holders and do not contain data.
        if (!styleImage || !styleImage->isCachedImage())
            continue;

        CachedImage* image = static_cast<StyleCachedImage*>(styleImage)->cachedImage();

        KURL url = cssStyleSheet->document()->completeURL(image->url());
        addImageToResources(image, url);
    }
}

void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, const FloatRect& srcRect, const FloatRect& dstRect,
    ExceptionCode& ec)
{
    ASSERT(image);

    ec = 0;

    FloatRect imageRect = FloatRect(FloatPoint(), size(image));
    if (!(imageRect.contains(srcRect) && srcRect.width() >= 0 && srcRect.height() >= 0 
            && dstRect.width() >= 0 && dstRect.height() >= 0)) {
        ec = INDEX_SIZE_ERR;
        return;
    }

    if (srcRect.isEmpty() || dstRect.isEmpty())
        return;

    GraphicsContext* c = drawingContext();
    if (!c)
        return;

    CachedImage* cachedImage = image->cachedImage();
    if (!cachedImage)
        return;

    if (m_canvas->originClean())
        checkOrigin(KURL(cachedImage->url()));

    FloatRect sourceRect = c->roundToDevicePixels(srcRect);
    FloatRect destRect = c->roundToDevicePixels(dstRect);
    willDraw(destRect);
    c->drawImage(cachedImage->image(), destRect, sourceRect, state().m_globalComposite);
}

// FIXME: Why isn't this just another overload of drawImage? Why have a different name?
void CanvasRenderingContext2D::drawImageFromRect(HTMLImageElement* image,
    float sx, float sy, float sw, float sh,
    float dx, float dy, float dw, float dh,
    const String& compositeOperation)
{
    if (!image)
        return;

    CachedImage* cachedImage = image->cachedImage();
    if (!cachedImage)
        return;

    if (m_canvas->originClean())
        checkOrigin(KURL(cachedImage->url()));

    GraphicsContext* c = drawingContext();
    if (!c)
        return;

    CompositeOperator op;
    if (!parseCompositeOperator(compositeOperation, op))
        op = CompositeSourceOver;

    FloatRect destRect = FloatRect(dx, dy, dw, dh);
    willDraw(destRect);
    c->drawImage(cachedImage->image(), destRect, FloatRect(sx, sy, sw, sh), op);
}

bool checkShapeImageOrigin(Document& document, CachedImage& cachedImage)
{
    if (cachedImage.isOriginClean(document.securityOrigin()))
        return true;

    const URL& url = cachedImage.url();
    String urlString = url.isNull() ? "''" : url.stringCenterEllipsizedToLength();
    document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Unsafe attempt to load URL " + urlString + ".");

    return false;
}

void ImageLoader::updateFromElement()
{
    // If we're not making renderers for the page, then don't load images.  We don't want to slow
    // down the raw HTML parsing case by loading images we don't intend to display.
    Document* document = m_element->document();
    if (!document->renderer())
        return;

    AtomicString attr = m_element->getAttribute(m_element->imageSourceAttributeName());

    if (attr == m_failedLoadURL)
        return;

    // Do not load any image if the 'src' attribute is missing or if it is
    // an empty string referring to a local file. The latter condition is
    // a quirk that preserves old behavior that Dashboard widgets
    // need (<rdar://problem/5994621>).
    CachedImage* newImage = 0;
    if (!(attr.isNull() || (attr.isEmpty() && document->baseURI().isLocalFile()))) {
        if (m_loadManually) {
            document->docLoader()->setAutoLoadImages(false);
            newImage = new CachedImage(sourceURI(attr));
            newImage->setLoading(true);
            newImage->setDocLoader(document->docLoader());
            document->docLoader()->m_documentResources.set(newImage->url(), newImage);
        } else
            newImage = document->docLoader()->requestImage(sourceURI(attr));

        // If we do not have an image here, it means that a cross-site
        // violation occurred.
        m_failedLoadURL = !newImage ? attr : AtomicString();
    }
    
    CachedImage* oldImage = m_image.get();
    if (newImage != oldImage) {
        setLoadingImage(newImage);
        if (newImage) {
            newImage->addClient(this);
            if (!m_element->document()->hasListenerType(Document::BEFORELOAD_LISTENER))
                dispatchPendingBeforeLoadEvent();
            else
                beforeLoadEventSender().dispatchEventSoon(this);
        }
        if (oldImage)
            oldImage->removeClient(this);
    }

    if (RenderObject* renderer = m_element->renderer()) {
        if (!renderer->isImage())
            return;
        toRenderImage(renderer)->resetAnimation();
    }
}

void HTMLImageLoader::updateFromElement()
{
    // If we're not making renderers for the page, then don't load images.  We don't want to slow
    // down the raw HTML parsing case by loading images we don't intend to display.
    Element* elem = element();
    Document* doc = elem->document();
    if (!doc->renderer())
        return;

    AtomicString attr = elem->getAttribute(elem->imageSourceAttributeName());
    
    // Do not load any image if the 'src' attribute is missing or if it is
    // an empty string referring to a local file. The latter condition is
    // a quirk that preserves old behavior that Dashboard widgets
    // need (<rdar://problem/5994621>).
    CachedImage *newImage = 0;
    if (!(attr.isNull() || attr.isEmpty() && doc->baseURI().isLocalFile())) {
        if (m_loadManually) {
            doc->docLoader()->setAutoLoadImages(false);
            newImage = new CachedImage(parseURL(attr));
            newImage->setLoading(true);
            newImage->setDocLoader(doc->docLoader());
            doc->docLoader()->m_docResources.set(newImage->url(), newImage);
        } else
            newImage = doc->docLoader()->requestImage(parseURL(attr));
    }
    
    CachedImage *oldImage = m_image;
    if (newImage != oldImage) {
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
        if (!doc->ownerElement() && newImage)
           OWB_PRINTF("Image requested at %d\n", doc->elapsedTime());
#endif
        setLoadingImage(newImage);
        if (newImage)
            newImage->addClient(this);
        if (oldImage)
            oldImage->removeClient(this);
    }

    if (RenderObject* renderer = elem->renderer())
        if (renderer->isImage())
            static_cast<RenderImage*>(renderer)->resetAnimation();
}

void HTMLImageLoader::updateFromElement()
{
    // If we're not making renderers for the page, then don't load images.  We don't want to slow
    // down the raw HTML parsing case by loading images we don't intend to display.
    Element* elem = element();
    Document* doc = elem->document();
    if (!doc->renderer())
        return;

    AtomicString attr = elem->getAttribute(elem->hasLocalName(objectTag) ? dataAttr : srcAttr);
    
    // Treat a lack of src or empty string for src as no image at all.
    CachedImage *newImage = 0;
    if (!attr.isEmpty()) {
        if (m_loadManually) {
            doc->docLoader()->setAutoLoadImages(false);
            newImage = new CachedImage(doc->docLoader(), parseURL(attr), false /* not for cache */);
            newImage->setLoading(true);
            newImage->setDocLoader(doc->docLoader());
            doc->docLoader()->m_docResources.set(newImage->url(), newImage);
        } else
            newImage = doc->docLoader()->requestImage(parseURL(attr));
    }
    
    CachedImage *oldImage = m_image;
    if (newImage != oldImage) {
#ifdef INSTRUMENT_LAYOUT_SCHEDULING
        if (!doc->ownerElement() && newImage)
            printf("Image requested at %d\n", doc->elapsedTime());
#endif
        setLoadingImage(newImage);
        if (newImage)
            newImage->ref(this);
        if (oldImage)
            oldImage->deref(this);
    }

    if (RenderObject* renderer = elem->renderer())
        if (renderer->isImage())
            static_cast<RenderImage*>(renderer)->resetAnimation();
}

PassRefPtr<CanvasPattern> CanvasRenderingContext2D::createPattern(HTMLImageElement* image,
    const String& repetitionType, ExceptionCode& ec)
{
    bool repeatX, repeatY;
    ec = 0;
    CanvasPattern::parseRepetitionType(repetitionType, repeatX, repeatY, ec);
    if (ec)
        return 0;

    if (!image->complete()) {
        ec = INVALID_STATE_ERR;
        return 0;
    }

    CachedImage* cachedImage = image->cachedImage();
    if (!cachedImage || !image->cachedImage()->image())
        return CanvasPattern::create(Image::nullImage(), repeatX, repeatY, true);

    RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromString(cachedImage->url());
    bool originClean = m_canvas->document()->securityOrigin()->canAccess(origin.get());
    return CanvasPattern::create(cachedImage->image(), repeatX, repeatY, originClean);
}

void ImageLoader::updateFromElement()
{
    // If we're not making renderers for the page, then don't load images.  We don't want to slow
    // down the raw HTML parsing case by loading images we don't intend to display.
    Document* document = m_element->document();
    if (!document->renderer())
        return;

    AtomicString attr = m_element->getAttribute(m_element->imageSourceAttributeName());

    if (attr == m_failedLoadURL)
        return;

    // Do not load any image if the 'src' attribute is missing or if it is
    // an empty string.
    CachedImage* newImage = 0;
    if (!attr.isNull() && !stripLeadingAndTrailingHTMLSpaces(attr).isEmpty()) {
        ResourceRequest request = ResourceRequest(document->completeURL(sourceURI(attr)));

        String crossOriginMode = m_element->fastGetAttribute(HTMLNames::crossoriginAttr);
        if (!crossOriginMode.isNull()) {
            StoredCredentials allowCredentials = equalIgnoringCase(crossOriginMode, "use-credentials") ? AllowStoredCredentials : DoNotAllowStoredCredentials;
            updateRequestForAccessControl(request, document->securityOrigin(), allowCredentials);
        }

        if (m_loadManually) {
            bool autoLoadOtherImages = document->cachedResourceLoader()->autoLoadImages();
            document->cachedResourceLoader()->setAutoLoadImages(false);
            newImage = new CachedImage(request);
            newImage->setLoading(true);
            newImage->setOwningCachedResourceLoader(document->cachedResourceLoader());
            document->cachedResourceLoader()->m_documentResources.set(newImage->url(), newImage);
            document->cachedResourceLoader()->setAutoLoadImages(autoLoadOtherImages);
        } else
            newImage = document->cachedResourceLoader()->requestImage(request);

        // If we do not have an image here, it means that a cross-site
        // violation occurred.
        m_failedLoadURL = !newImage ? attr : AtomicString();
    } else if (!attr.isNull()) // Fire an error event if the url is empty.
        m_element->dispatchEvent(Event::create(eventNames().errorEvent, false, false));
    
    CachedImage* oldImage = m_image.get();
    if (newImage != oldImage) {
        if (!m_firedBeforeLoad)
            beforeLoadEventSender().cancelEvent(this);
        if (!m_firedLoad)
            loadEventSender().cancelEvent(this);

        m_image = newImage;
        m_firedBeforeLoad = !newImage;
        m_firedLoad = !newImage;
        m_imageComplete = !newImage;

        if (newImage) {
            if (!m_element->document()->hasListenerType(Document::BEFORELOAD_LISTENER))
                dispatchPendingBeforeLoadEvent();
            else
                beforeLoadEventSender().dispatchEventSoon(this);

            // If newImage is cached, addClient() will result in the load event
            // being queued to fire. Ensure this happens after beforeload is
            // dispatched.
            newImage->addClient(this);
        }
        if (oldImage)
            oldImage->removeClient(this);
    }

    if (RenderImageResource* imageResource = renderImageResource())
        imageResource->resetAnimation();
}

void ImageLoader::updateFromElement()
{
    // If we're not making renderers for the page, then don't load images.  We don't want to slow
    // down the raw HTML parsing case by loading images we don't intend to display.
    Document* document = m_element->document();
    if (!document->renderer())
        return;

    AtomicString attr = m_element->getAttribute(m_element->imageSourceAttributeName());

    if (attr == m_failedLoadURL)
        return;

    // Do not load any image if the 'src' attribute is missing or if it is
    // an empty string referring to a local file. The latter condition is
    // a quirk that preserves old behavior that Dashboard widgets
    // need (<rdar://problem/5994621>).
    CachedImage* newImage = 0;
    // CAPPFIX_WEB_IMG_SRC_NULL
#if 1
    if (!attr.isNull() && !stripLeadingAndTrailingHTMLSpaces(attr).isEmpty()) {
#else
    if (!(attr.isNull() || (attr.isEmpty() && document->baseURI().isLocalFile()))) {
#endif
        ResourceRequest request = ResourceRequest(document->completeURL(sourceURI(attr)));

        String crossOriginMode = m_element->fastGetAttribute(HTMLNames::crossoriginAttr);
        if (!crossOriginMode.isNull()) {
            bool allowCredentials = equalIgnoringCase(crossOriginMode, "use-credentials");
            updateRequestForAccessControl(request, document->securityOrigin(), allowCredentials);
        }

        if (m_loadManually) {
            bool autoLoadOtherImages = document->cachedResourceLoader()->autoLoadImages();
            document->cachedResourceLoader()->setAutoLoadImages(false);
            newImage = new CachedImage(request);
            newImage->setLoading(true);
            newImage->setOwningCachedResourceLoader(document->cachedResourceLoader());
            document->cachedResourceLoader()->m_documentResources.set(newImage->url(), newImage);
            document->cachedResourceLoader()->setAutoLoadImages(autoLoadOtherImages);
        } else
            newImage = document->cachedResourceLoader()->requestImage(request);

        // If we do not have an image here, it means that a cross-site
        // violation occurred.
        m_failedLoadURL = !newImage ? attr : AtomicString();
// CAPPFIX_WEB_IMG_SRC_NULL
#if 1
    } else if (!attr.isNull()) // Fire an error event if the url is empty.
        m_element->dispatchEvent(Event::create(eventNames().errorEvent, false, false));
#else
    }
#endif
    
    CachedImage* oldImage = m_image.get();
    if (newImage != oldImage) {
        if (!m_firedBeforeLoad)
            beforeLoadEventSender().cancelEvent(this);
        if (!m_firedLoad)
            loadEventSender().cancelEvent(this);

        m_image = newImage;
        m_firedBeforeLoad = !newImage;
        m_firedLoad = !newImage;
        m_imageComplete = !newImage;

        if (newImage) {
            newImage->addClient(this);
            if (!m_element->document()->hasListenerType(Document::BEFORELOAD_LISTENER))
                dispatchPendingBeforeLoadEvent();
            else
                beforeLoadEventSender().dispatchEventSoon(this);
        }
        if (oldImage)
            oldImage->removeClient(this);
    }

    if (RenderImageResource* imageResource = renderImageResource())
        imageResource->resetAnimation();
}