C++ SVGViewSpec::reset方法代码示例

void SVGSVGElement::setupInitialView(const String& fragmentIdentifier, Element* anchorNode)
{
    LayoutObject* layoutObject = this->layoutObject();
    SVGViewSpec* view = m_viewSpec.get();
    if (view)
        view->reset();

    bool hadUseCurrentView = m_useCurrentView;
    m_useCurrentView = false;

    if (fragmentIdentifier.startsWith("svgView(")) {
        if (!view)
            view = currentView(); // Create the SVGViewSpec.

        view->inheritViewAttributesFromElement(this);

        if (view->parseViewSpec(fragmentIdentifier)) {
            UseCounter::count(document(), UseCounter::SVGSVGElementFragmentSVGView);
            m_useCurrentView = true;
        } else {
            view->reset();
        }

        if (layoutObject && (hadUseCurrentView || m_useCurrentView))
            markForLayoutAndParentResourceInvalidation(layoutObject);
        return;
    }

    // Spec: If the SVG fragment identifier addresses a 'view' element within an SVG document (e.g., MyDrawing.svg#MyView
    // or MyDrawing.svg#xpointer(id('MyView'))) then the closest ancestor 'svg' element is displayed in the viewport.
    // Any view specification attributes included on the given 'view' element override the corresponding view specification
    // attributes on the closest ancestor 'svg' element.
    // TODO(ed): The spec text above is a bit unclear.
    // Should the transform from outermost svg to nested svg be applied to "display"
    // the inner svg in the viewport, then let the view element override the inner
    // svg's view specification attributes. Should it fill/override the outer viewport?
    if (isSVGViewElement(anchorNode)) {
        SVGViewElement& viewElement = toSVGViewElement(*anchorNode);

        if (SVGSVGElement* svg = viewElement.ownerSVGElement()) {
            svg->inheritViewAttributes(&viewElement);

            if (LayoutObject* layoutObject = svg->layoutObject())
                markForLayoutAndParentResourceInvalidation(layoutObject);

            return;
        }
    }

    // If we previously had a view and didn't get a new one, we need to
    // layout again.
    if (layoutObject && hadUseCurrentView)
        markForLayoutAndParentResourceInvalidation(layoutObject);

    // FIXME: We need to decide which <svg> to focus on, and zoom to it.
    // FIXME: We need to actually "highlight" the viewTarget(s).
}

void SVGSVGElement::setupInitialView(const String& fragmentIdentifier, Element* anchorNode)
{
    RenderObject* renderer = this->renderer();
    SVGViewSpec* view = m_viewSpec.get();
    if (view)
        view->reset();

    bool hadUseCurrentView = m_useCurrentView;
    m_useCurrentView = false;

    if (fragmentIdentifier.startsWith("xpointer(")) {
        // FIXME: XPointer references are ignored (https://bugs.webkit.org/show_bug.cgi?id=17491)
        if (renderer && hadUseCurrentView)
            RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    if (fragmentIdentifier.startsWith("svgView(")) {
        if (!view)
            view = currentView(); // Create the SVGViewSpec.

        if (view->parseViewSpec(fragmentIdentifier))
            m_useCurrentView = true;
        else
            view->reset();

        if (renderer && (hadUseCurrentView || m_useCurrentView))
            RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    // Spec: If the SVG fragment identifier addresses a ‘view’ element within an SVG document (e.g., MyDrawing.svg#MyView
    // or MyDrawing.svg#xpointer(id('MyView'))) then the closest ancestor ‘svg’ element is displayed in the viewport.
    // Any view specification attributes included on the given ‘view’ element override the corresponding view specification
    // attributes on the closest ancestor ‘svg’ element.
    if (anchorNode && anchorNode->hasTagName(SVGNames::viewTag)) {
        if (SVGViewElement* viewElement = anchorNode->hasTagName(SVGNames::viewTag) ? static_cast<SVGViewElement*>(anchorNode) : 0) {
            SVGElement* element = SVGLocatable::nearestViewportElement(viewElement);
            if (element->hasTagName(SVGNames::svgTag)) {
                SVGSVGElement* svg = static_cast<SVGSVGElement*>(element);
                svg->inheritViewAttributes(viewElement);

                if (RenderObject* renderer = svg->renderer())
                    RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
            }
        }
        return;
    }

    // FIXME: We need to decide which <svg> to focus on, and zoom to it.
    // FIXME: We need to actually "highlight" the viewTarget(s).
}

void SVGSVGElement::scrollToAnchor(const String& fragmentIdentifier, Element* anchorNode)
{
    auto renderer = this->renderer();
    SVGViewSpec* view = m_viewSpec.get();
    if (view)
        view->reset();

    bool hadUseCurrentView = m_useCurrentView;
    m_useCurrentView = false;

    if (fragmentIdentifier.startsWith("xpointer(")) {
        // FIXME: XPointer references are ignored (https://bugs.webkit.org/show_bug.cgi?id=17491)
        if (renderer && hadUseCurrentView)
            RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
        return;
    }

    if (fragmentIdentifier.startsWith("svgView(")) {
        if (!view)
            view = &currentView(); // Create the SVGViewSpec.
        if (view->parseViewSpec(fragmentIdentifier))
            m_useCurrentView = true;
        else
            view->reset();
        if (renderer && (hadUseCurrentView || m_useCurrentView))
            RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
        return;
    }

    // Spec: If the SVG fragment identifier addresses a "view" element within an SVG document (e.g., MyDrawing.svg#MyView
    // or MyDrawing.svg#xpointer(id('MyView'))) then the closest ancestor "svg" element is displayed in the viewport.
    // Any view specification attributes included on the given "view" element override the corresponding view specification
    // attributes on the closest ancestor "svg" element.
    if (is<SVGViewElement>(anchorNode)) {
        auto& viewElement = downcast<SVGViewElement>(*anchorNode);
        auto* viewportElement = SVGLocatable::nearestViewportElement(&viewElement);
        if (is<SVGSVGElement>(viewportElement)) {
            auto& element = downcast<SVGSVGElement>(*viewportElement);
            element.inheritViewAttributes(viewElement);
            if (auto* renderer = element.renderer())
                RenderSVGResource::markForLayoutAndParentResourceInvalidation(*renderer);
        }
        return;
    }

    // FIXME: We need to decide which <svg> to focus on, and zoom to it.
    // FIXME: We need to actually "highlight" the viewTarget(s).
}