LayoutUnit RenderSVGRoot::computeReplacedLogicalHeight() const
{
// When we're embedded through SVGImage (border-image/background-image/<html:img>/...) we're forced to resize to a specific size.
LayoutUnit replacedHeight = m_containerSize.height();
if (replacedHeight > 0)
return replacedHeight;
replacedHeight = RenderBox::computeReplacedLogicalHeight();
Frame* frame = node() && node()->document() ? node()->document()->frame() : 0;
if (!frame)
return replacedHeight;
if (!isEmbeddedThroughFrameContainingSVGDocument())
return replacedHeight;
RenderPart* ownerRenderer = frame->ownerRenderer();
ASSERT(ownerRenderer);
RenderStyle* ownerRendererStyle = ownerRenderer->style();
ASSERT(ownerRendererStyle);
Length ownerHeight = ownerRendererStyle->height();
if (ownerHeight.isAuto())
return replacedHeight;
// Spec: http://dev.w3.org/SVG/profiles/1.1F2/publish/coords.html#ViewportSpace
// See comment in RenderSVGRoot::computeReplacedLogicalWidth().
// 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.
return ownerRenderer->computeReplacedLogicalHeightRespectingMinMaxHeight(ownerRenderer->computeReplacedLogicalHeightUsing(ownerHeight));
}
int RenderSVGRoot::computeReplacedLogicalHeight() const
{
int replacedHeight = RenderBox::computeReplacedLogicalHeight();
Frame* frame = node() && node()->document() ? node()->document()->frame() : 0;
if (!frame)
return computeIntrinsicHeight(replacedHeight);
// If our frame has an owner renderer, we're embedded through eg. object/embed.
RenderPart* ownerRenderer = frame->ownerRenderer();
if (!ownerRenderer)
return computeIntrinsicHeight(replacedHeight);
RenderStyle* ownerRendererStyle = ownerRenderer->style();
ASSERT(ownerRendererStyle);
ASSERT(frame->contentRenderer());
Length ownerHeight = ownerRendererStyle->height();
if (ownerHeight.isAuto())
return replacedHeight;
// Spec: http://dev.w3.org/SVG/profiles/1.1F2/publish/coords.html#ViewportSpace
// See comment in RenderSVGRoot::computeReplacedLogicalWidth().
// 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.
return ownerRenderer->computeReplacedLogicalHeightRespectingMinMaxHeight(ownerRenderer->computeReplacedLogicalHeightUsing(ownerHeight));
}
LayoutUnit RenderSVGRoot::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
// When we're embedded through SVGImage (border-image/background-image/<html:img>/...) we're forced to resize to a specific size.
LayoutUnit replacedWidth = m_containerSize.width();
if (replacedWidth > 0)
return replacedWidth;
replacedWidth = RenderBox::computeReplacedLogicalWidth(includeMaxWidth);
Frame* frame = node() && node()->document() ? node()->document()->frame() : 0;
if (!frame)
return replacedWidth;
if (!isEmbeddedThroughFrameContainingSVGDocument())
return replacedWidth;
RenderPart* ownerRenderer = frame->ownerRenderer();
RenderStyle* ownerRendererStyle = ownerRenderer->style();
ASSERT(ownerRendererStyle);
ASSERT(frame->contentRenderer());
Length ownerWidth = ownerRendererStyle->width();
if (ownerWidth.isAuto())
return replacedWidth;
// Spec: http://dev.w3.org/SVG/profiles/1.1F2/publish/coords.html#ViewportSpace
// The SVG user agent negotiates with its parent user agent to determine the viewport into which the SVG user agent can render
// the document. In some circumstances, SVG content will be embedded (by reference or inline) within a containing document.
// This containing document might include attributes, properties and/or other parameters (explicit or implicit) which specify
// or provide hints about the dimensions of the viewport for the SVG content. SVG content itself optionally can provide
// information about the appropriate viewport region for the content via the ‘width’ and ‘height’ XML attributes on the
// outermost svg element. The negotiation process uses any information provided by the containing document and the SVG
// content itself to choose the viewport location and size.
// 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.
return ownerRenderer->computeReplacedLogicalWidthRespectingMinMaxWidth(ownerRenderer->computeReplacedLogicalWidthUsing(ownerWidth), includeMaxWidth);
}
