AffineTransform SVGSVGElement::viewBoxToViewTransform(float viewWidth, float viewHeight) const
{
FloatRect viewBoxRect;
if (useCurrentView()) {
if (currentView()) // what if we should use it but it is not set?
viewBoxRect = currentView()->viewBox();
} else
viewBoxRect = viewBox();
AffineTransform ctm = SVGFitToViewBox::viewBoxToViewTransform(viewBoxRect, preserveAspectRatio(), viewWidth, viewHeight);
if (useCurrentView() && currentView())
return currentView()->transform()->concatenate().matrix() * ctm;
return ctm;
}
FloatRect SVGSVGElement::currentViewBoxRect() const
{
if (useCurrentView()) {
if (SVGViewSpec* view = currentView()) // what if we should use it but it is not set?
return view->viewBox();
return FloatRect();
}
FloatRect useViewBox = viewBox();
if (!useViewBox.isEmpty())
return useViewBox;
if (!renderer() || !renderer()->isSVGRoot())
return FloatRect();
if (!toRenderSVGRoot(renderer())->isEmbeddedThroughSVGImage())
return FloatRect();
Length intrinsicWidth = this->intrinsicWidth();
Length intrinsicHeight = this->intrinsicHeight();
if (!intrinsicWidth.isFixed() || !intrinsicHeight.isFixed())
return FloatRect();
// If no viewBox is specified but non-relative width/height values, then we
// should always synthesize a viewBox if we're embedded through a SVGImage.
return FloatRect(FloatPoint(), FloatSize(intrinsicWidth.calcFloatValue(0), intrinsicHeight.calcFloatValue(0)));
}
FloatRect SVGSVGElement::currentViewBoxRect(CalculateViewBoxMode mode) const
{
// This method resolves length manually, w/o involving the render tree. This is desired, as getCTM()/getScreenCTM()/.. have to work without a renderer.
SVGLengthContext lengthContext(this);
// FIXME: The interaction of 'currentView' and embedding SVGs in other documents, is untested and unspecified.
if (useCurrentView()) {
if (SVGViewSpec* view = currentView()) // what if we should use it but it is not set?
return view->viewBox();
return FloatRect();
}
bool isEmbeddedThroughSVGImage = renderer() && renderer()->isSVGRoot() ? toRenderSVGRoot(renderer())->isEmbeddedThroughSVGImage() : false;
bool hasFixedSize = width().unitType() != LengthTypePercentage && height().unitType() != LengthTypePercentage;
FloatRect useViewBox = viewBox();
if (useViewBox.isEmpty()) {
// If no viewBox is specified but non-relative width/height values, then we
// should always synthesize a viewBox if we're embedded through a SVGImage.
if (hasFixedSize && isEmbeddedThroughSVGImage)
return FloatRect(0, 0, width().value(lengthContext), height().value(lengthContext));
return FloatRect();
}
// If a viewBox is specified and non-relative width/height values, then the host document only
// uses the width/height values to figure out the intrinsic size when embedding us, whereas the
// embedded document sees specified viewBox only.
if (hasFixedSize && mode == CalculateViewBoxInHostDocument)
return FloatRect(0, 0, width().value(lengthContext), height().value(lengthContext));
return useViewBox;
}
FloatRect SVGSVGElement::currentViewBoxRect() const
{
if (useCurrentView()) {
if (SVGViewSpec* view = currentView()) // what if we should use it but it is not set?
return view->viewBox();
return FloatRect();
}
return viewBox();
}
AffineTransform SVGSVGElement::viewBoxToViewTransform(float viewWidth, float viewHeight) const
{
AffineTransform ctm = SVGFitToViewBox::viewBoxToViewTransform(currentViewBoxRect(), preserveAspectRatio(), viewWidth, viewHeight);
if (useCurrentView() && currentView()) {
AffineTransform transform;
if (currentView()->transform().concatenate(transform))
ctm *= transform;
}
return ctm;
}
TransformationMatrix SVGSVGElement::viewBoxToViewTransform(float viewWidth, float viewHeight) const
{
FloatRect viewBoxRect;
if (useCurrentView()) {
if (currentView()) // what if we should use it but it is not set?
viewBoxRect = currentView()->viewBox();
} else
viewBoxRect = viewBox();
if (!viewBoxRect.width() || !viewBoxRect.height())
return TransformationMatrix();
TransformationMatrix ctm = preserveAspectRatio()->getCTM(viewBoxRect.x(),
viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(),
0, 0, viewWidth, viewHeight);
if (useCurrentView() && currentView())
return currentView()->transform()->concatenate().matrix() * ctm;
return ctm;
}