C++ SVGSVGElement类代码示例

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionGetBBox(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());


    JSC::JSValue result = toJS(exec, JSSVGStaticPODTypeWrapper<FloatRect>::create(imp->getBBox()).get(), imp);
    return result;
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionCreateSVGAngle(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());


    JSC::JSValue result = toJS(exec, WTF::getPtr(imp->createSVGAngle()), imp);
    return result;
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionSetCurrentTime(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());
    float seconds = args.at(0).toFloat(exec);

    imp->setCurrentTime(seconds);
    return jsUndefined();
}

bool SVGImage::usesContainerSize() const
{
    if (!m_page)
        return false;
    Frame* frame = m_page->mainFrame();
    SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
    if (!rootElement)
        return false;
    if (RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer()))
        return !renderer->containerSize().isEmpty();
    return false;
}

TransformationMatrix RenderSVGViewportContainer::viewportTransform() const
{
    if (element()->hasTagName(SVGNames::svgTag)) {
        SVGSVGElement* svg = static_cast<SVGSVGElement*>(element());
        return svg->viewBoxToViewTransform(viewport().width(), viewport().height());
    } else if (element()->hasTagName(SVGNames::markerTag)) {
        SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(element());
        return marker->viewBoxToViewTransform(viewport().width(), viewport().height());
    }

    return TransformationMatrix();
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionGetCurrentTime(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());


    JSC::JSValue result = jsNumber(exec, imp->getCurrentTime());
    return result;
}

// RenderBox methods will expect coordinates w/o any transforms in coordinates
// relative to our borderBox origin.  This method gives us exactly that.
void RenderSVGRoot::buildLocalToBorderBoxTransform()
{
    SVGSVGElement* svg = toSVGSVGElement(node());
    ASSERT(svg);
    float scale = style()->effectiveZoom();
    SVGPoint translate = svg->currentTranslate();
    LayoutSize borderAndPadding(borderLeft() + paddingLeft(), borderTop() + paddingTop());
    m_localToBorderBoxTransform = svg->viewBoxToViewTransform(contentWidth() / scale, contentHeight() / scale);
    if (borderAndPadding.isEmpty() && scale == 1 && translate == SVGPoint::zero())
        return;
    m_localToBorderBoxTransform = AffineTransform(scale, 0, 0, scale, borderAndPadding.width() + translate.x(), borderAndPadding.height() + translate.y()) * m_localToBorderBoxTransform;
}

// LayoutBox methods will expect coordinates w/o any transforms in coordinates
// relative to our borderBox origin.  This method gives us exactly that.
void LayoutSVGRoot::buildLocalToBorderBoxTransform()
{
    SVGSVGElement* svg = toSVGSVGElement(node());
    ASSERT(svg);
    float scale = style()->effectiveZoom();
    FloatPoint translate = svg->currentTranslate();
    LayoutSize borderAndPadding(borderLeft() + paddingLeft(), borderTop() + paddingTop());
    m_localToBorderBoxTransform = svg->viewBoxToViewTransform(contentWidth() / scale, contentHeight() / scale);

    AffineTransform viewToBorderBoxTransform(scale, 0, 0, scale, borderAndPadding.width() + translate.x(), borderAndPadding.height() + translate.y());
    m_localToBorderBoxTransform.preMultiply(viewToBorderBoxTransform);
}

void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    // An empty viewport disables rendering.
    if (pixelSnappedBorderBoxRect().isEmpty())
        return;

    // Don't paint, if the context explicitly disabled it.
    if (paintInfo.context->paintingDisabled())
        return;

    // An empty viewBox also disables rendering.
    // (http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute)
    SVGSVGElement* svg = toSVGSVGElement(node());
    ASSERT(svg);
    if (svg->hasEmptyViewBox())
        return;

    // Don't paint if we don't have kids, except if we have filters we should paint those.
    if (!firstChild()) {
        SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
        if (!resources || !resources->filter())
            return;
    }

    // Make a copy of the PaintInfo because applyTransform will modify the damage rect.
    PaintInfo childPaintInfo(paintInfo);
    childPaintInfo.context->save();

    // Apply initial viewport clip
    if (shouldApplyViewportClip())
        childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset)));

    // Convert from container offsets (html renderers) to a relative transform (svg renderers).
    // Transform from our paint container's coordinate system to our local coords.
    IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
    childPaintInfo.applyTransform(AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * localToBorderBoxTransform());

    // SVGRenderingContext must be destroyed before we restore the childPaintInfo.context, because a filter may have
    // changed the context and it is only reverted when the SVGRenderingContext destructor finishes applying the filter.
    {
        SVGRenderingContext renderingContext;
        bool continueRendering = true;
        if (childPaintInfo.phase == PaintPhaseForeground) {
            renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
            continueRendering = renderingContext.isRenderingPrepared();
        }

        if (continueRendering)
            RenderBox::paint(childPaintInfo, LayoutPoint());
    }

    childPaintInfo.context->restore();
}

void SVGImage::drawSVGToImageBuffer(ImageBuffer* buffer, const IntSize& size, float zoom, ShouldClearBuffer shouldClear)
{
    // FIXME: This doesn't work correctly with animations. If an image contains animations, that say run for 2 seconds,
    // and we currently have one <img> that displays us. If we open another document referencing the same SVGImage it
    // will display the document at a time where animations already ran - even though it has its own ImageBuffer.
    // We currently don't implement SVGSVGElement::setCurrentTime, and can NOT go back in time, once animations started.
    // There's no way to fix this besides avoiding style/attribute mutations from SVGAnimationElement.
    ASSERT(buffer);
    ASSERT(!size.isEmpty());

    if (!m_page)
        return;

    Frame* frame = m_page->mainFrame();
    SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
    if (!rootElement)
        return;
    RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer());
    if (!renderer)
        return;

    // Draw image at requested size.
    ImageObserver* observer = imageObserver();
    ASSERT(observer);

    // Temporarily reset image observer, we don't want to receive any changeInRect() calls due this relayout.
    setImageObserver(0);
    renderer->setContainerSize(size);
    frame->view()->resize(this->size());
    if (zoom != 1)
        frame->setPageZoomFactor(zoom);

    // Eventually clear image buffer.
    IntRect rect(IntPoint(), size);
    if (shouldClear == ClearImageBuffer)
        buffer->context()->clearRect(rect);

    // Draw SVG on top of ImageBuffer.
    draw(buffer->context(), rect, rect, ColorSpaceDeviceRGB, CompositeSourceOver);

    // Reset container size & zoom to initial state. Otherwhise the size() of this
    // image would return whatever last size was set by drawSVGToImageBuffer().
    if (zoom != 1)
        frame->setPageZoomFactor(1);

    renderer->setContainerSize(IntSize());
    frame->view()->resize(this->size());
    if (frame->view()->needsLayout())
        frame->view()->layout();

    setImageObserver(observer); 
}

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).
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionCreateSVGTransformFromMatrix(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());
    TransformationMatrix matrix = toSVGMatrix(args.at(0));


    JSC::JSValue result = toJS(exec, JSSVGStaticPODTypeWrapper<SVGTransform>::create(imp->createSVGTransformFromMatrix(matrix)).get(), imp);
    return result;
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionSuspendRedraw(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());
    unsigned maxWaitMilliseconds = args.at(0).toInt32(exec);


    JSC::JSValue result = jsNumber(exec, imp->suspendRedraw(maxWaitMilliseconds));
    return result;
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionHasExtension(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());
    const UString& extension = args.at(0).toString(exec);


    JSC::JSValue result = jsBoolean(imp->hasExtension(extension));
    return result;
}

JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionGetPresentationAttribute(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args)
{
    UNUSED_PARAM(args);
    if (!thisValue.isObject(&JSSVGSVGElement::s_info))
        return throwError(exec, TypeError);
    JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue));
    SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl());
    const UString& name = args.at(0).toString(exec);


    JSC::JSValue result = toJS(exec, WTF::getPtr(imp->getPresentationAttribute(name)));
    return result;
}