1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 // Keep in (case-insensitive) order:
8 #include "mozilla/PresShell.h"
9 #include "mozilla/SVGOuterSVGFrame.h"
10 #include "mozilla/SVGUtils.h"
11 #include "mozilla/dom/SVGSVGElement.h"
12 #include "mozilla/dom/SVGViewElement.h"
14 #include "nsGkAtoms.h"
16 using namespace mozilla::dom
;
18 nsIFrame
* NS_NewSVGViewFrame(mozilla::PresShell
* aPresShell
,
19 mozilla::ComputedStyle
* aStyle
);
24 * While views are not directly rendered in SVG they can be linked to
25 * and thereby override attributes of an <svg> element via a fragment
26 * identifier. The SVGViewFrame class passes on any attribute changes
27 * the view receives to the overridden <svg> element (if there is one).
29 class SVGViewFrame final
: public nsIFrame
{
30 friend nsIFrame
* ::NS_NewSVGViewFrame(mozilla::PresShell
* aPresShell
,
31 ComputedStyle
* aStyle
);
34 explicit SVGViewFrame(ComputedStyle
* aStyle
, nsPresContext
* aPresContext
)
35 : nsIFrame(aStyle
, aPresContext
, kClassID
) {
36 AddStateBits(NS_FRAME_SVG_LAYOUT
| NS_FRAME_IS_NONDISPLAY
);
40 NS_DECL_FRAMEARENA_HELPERS(SVGViewFrame
)
43 virtual void Init(nsIContent
* aContent
, nsContainerFrame
* aParent
,
44 nsIFrame
* aPrevInFlow
) override
;
47 bool IsFrameOfType(uint32_t aFlags
) const override
{
48 if (aFlags
& eSupportsContainLayoutAndPaint
) {
52 return nsIFrame::IsFrameOfType(aFlags
& ~(nsIFrame::eSVG
));
55 #ifdef DEBUG_FRAME_DUMP
56 nsresult
GetFrameName(nsAString
& aResult
) const override
{
57 return MakeFrameName(u
"SVGView"_ns
, aResult
);
61 virtual nsresult
AttributeChanged(int32_t aNameSpaceID
, nsAtom
* aAttribute
,
62 int32_t aModType
) override
;
64 bool ComputeCustomOverflow(OverflowAreas
& aOverflowAreas
) override
{
65 // We don't maintain a ink overflow rect
70 } // namespace mozilla
72 nsIFrame
* NS_NewSVGViewFrame(mozilla::PresShell
* aPresShell
,
73 mozilla::ComputedStyle
* aStyle
) {
74 return new (aPresShell
)
75 mozilla::SVGViewFrame(aStyle
, aPresShell
->GetPresContext());
80 NS_IMPL_FRAMEARENA_HELPERS(SVGViewFrame
)
83 void SVGViewFrame::Init(nsIContent
* aContent
, nsContainerFrame
* aParent
,
84 nsIFrame
* aPrevInFlow
) {
85 NS_ASSERTION(aContent
->IsSVGElement(nsGkAtoms::view
),
86 "Content is not an SVG view");
88 nsIFrame::Init(aContent
, aParent
, aPrevInFlow
);
92 nsresult
SVGViewFrame::AttributeChanged(int32_t aNameSpaceID
,
93 nsAtom
* aAttribute
, int32_t aModType
) {
94 // Ignore zoomAndPan as it does not cause the <svg> element to re-render
96 if (aNameSpaceID
== kNameSpaceID_None
&&
97 (aAttribute
== nsGkAtoms::preserveAspectRatio
||
98 aAttribute
== nsGkAtoms::viewBox
)) {
99 SVGOuterSVGFrame
* outerSVGFrame
= SVGUtils::GetOuterSVGFrame(this);
100 NS_ASSERTION(outerSVGFrame
->GetContent()->IsSVGElement(nsGkAtoms::svg
),
101 "Expecting an <svg> element");
103 SVGSVGElement
* svgElement
=
104 static_cast<SVGSVGElement
*>(outerSVGFrame
->GetContent());
107 mContent
->AsElement()->GetAttr(nsGkAtoms::id
, viewID
);
109 if (svgElement
->IsOverriddenBy(viewID
)) {
110 // We're the view that's providing overrides, so pretend that the frame
111 // we're overriding was updated.
112 outerSVGFrame
->AttributeChanged(aNameSpaceID
, aAttribute
, aModType
);
116 return nsIFrame::AttributeChanged(aNameSpaceID
, aAttribute
, aModType
);
119 } // namespace mozilla