IntSize SVGImage::containerSize() const
{
if (!m_page)
return IntSize();
Frame* frame = m_page->mainFrame();
SVGSVGElement* rootElement = toSVGDocument(frame->document())->rootElement();
if (!rootElement)
return IntSize();
RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer());
if (!renderer)
return IntSize();
// If a container size is available it has precedence.
IntSize containerSize = renderer->containerSize();
if (!containerSize.isEmpty())
return containerSize;
// Assure that a container size is always given for a non-identity zoom level.
ASSERT(renderer->style()->effectiveZoom() == 1);
FloatSize currentSize;
if (rootElement->intrinsicWidth().isFixed() && rootElement->intrinsicHeight().isFixed())
currentSize = rootElement->currentViewportSize();
else
currentSize = rootElement->currentViewBoxRect().size();
if (!currentSize.isEmpty())
return IntSize(static_cast<int>(ceilf(currentSize.width())), static_cast<int>(ceilf(currentSize.height())));
// As last resort, use CSS default intrinsic size.
return IntSize(300, 150);
}
bool SVGSVGElement::widthAttributeEstablishesViewport() const
{
if (!renderer() || renderer()->isSVGViewportContainer())
return true;
// Spec: http://www.w3.org/TR/SVG/coords.html#ViewportSpace
// The ‘width’ attribute on the outermost svg element establishes the viewport's width, unless the following conditions are met:
// - the SVG content is a separately stored resource that is embedded by reference (such as the ‘object’ element in XHTML [XHTML]), or
// the SVG content is embedded inline within a containing document;
// - and the referencing element or containing document is styled using CSS [CSS2] or XSL [XSL];
// - and there are CSS-compatible positioning properties ([CSS2], section 9.3) specified on the referencing element (e.g., the ‘object’ element)
// or on the containing document's outermost svg element that are sufficient to establish the width of the viewport. Under these conditions,
// the positioning properties establish the viewport's width.
RenderSVGRoot* root = toRenderSVGRoot(renderer());
// SVG embedded through object/embed/iframe.
if (root->isEmbeddedThroughFrameContainingSVGDocument())
return !root->hasReplacedLogicalWidth() && !document()->frame()->ownerRenderer()->hasReplacedLogicalWidth();
// SVG embedded via SVGImage (background-image/border-image/etc) / Inline SVG.
if (root->isEmbeddedThroughSVGImage() || document()->documentElement() != this)
return !root->hasReplacedLogicalWidth();
return true;
}
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 write(TextStream& ts, const RenderSVGRoot& root, int indent)
{
writeIndent(ts, indent);
ts << root.renderName();
if (root.element()) {
String tagName = getTagName(static_cast<SVGStyledElement*>(root.element()));
if (!tagName.isEmpty())
ts << " {" << tagName << "}";
}
ts << root << "\n";
for (RenderObject* child = root.firstChild(); child; child = child->nextSibling())
write(ts, *child, indent + 1);
}
void SVGImage::setContainerSize(const FloatSize& size)
{
if (!m_page || !usesContainerSize())
return;
SVGSVGElement* rootElement = toSVGDocument(m_page->mainFrame().document())->rootElement();
if (!rootElement)
return;
RenderSVGRoot* renderer = toRenderSVGRoot(rootElement->renderer());
if (!renderer)
return;
FrameView* view = frameView();
view->resize(this->containerSize());
renderer->setContainerSize(IntSize(size));
}
bool SVGSVGElement::heightAttributeEstablishesViewport() const
{
if (!renderer() || renderer()->isSVGViewportContainer())
return true;
// Spec: http://www.w3.org/TR/SVG/coords.html#IntrinsicSizing
// Similarly, if there are positioning properties specified on the referencing element or on the outermost svg element
// that are sufficient to establish the height of the viewport, then these positioning properties establish the viewport's
// height; otherwise, the ‘height’ attribute on the outermost svg element establishes the viewport's height.
RenderSVGRoot* root = toRenderSVGRoot(renderer());
// SVG embedded through object/embed/iframe.
if (root->isEmbeddedThroughFrameContainingSVGDocument())
return !root->hasReplacedLogicalHeight() && !document()->frame()->ownerRenderer()->hasReplacedLogicalHeight();
// SVG embedded via SVGImage (background-image/border-image/etc) / Inline SVG.
if (root->isEmbeddedThroughSVGImage() || document()->documentElement() != this)
return !root->hasReplacedLogicalHeight();
return true;
}
