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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Keep in (case-insensitive) order:
#include "gfxRect.h"
#include "SVGGFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGContainerFrame.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGTextFrame.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/SVGSwitchElement.h"
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGSwitchFrame final : public SVGGFrame {
friend nsIFrame* ::NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
protected:
explicit SVGSwitchFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: SVGGFrame(aStyle, aPresContext, kClassID) {}
public:
NS_DECL_FRAMEARENA_HELPERS(SVGSwitchFrame)
#ifdef DEBUG
virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGSwitch"_ns, aResult);
}
#endif
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
// ISVGDisplayableFrame interface:
virtual void PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
const nsIntRect* aDirtyRect = nullptr) override;
nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) override;
virtual void ReflowSVG() override;
virtual SVGBBox GetBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags) override;
private:
nsIFrame* GetActiveChildFrame();
void ReflowAllSVGTextFramesInsideNonActiveChildren(nsIFrame* aActiveChild);
static void AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid);
};
} // namespace mozilla
//----------------------------------------------------------------------
// Implementation
nsIFrame* NS_NewSVGSwitchFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGSwitchFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGSwitchFrame)
#ifdef DEBUG
void SVGSwitchFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::svgSwitch),
"Content is not an SVG switch");
SVGGFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
void SVGSwitchFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
nsIFrame* kid = GetActiveChildFrame();
if (kid) {
BuildDisplayListForChild(aBuilder, kid, aLists);
}
}
void SVGSwitchFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
const nsIntRect* aDirtyRect) {
NS_ASSERTION(
!NS_SVGDisplayListPaintingEnabled() || (mState & NS_FRAME_IS_NONDISPLAY),
"If display lists are enabled, only painting of non-display "
"SVG should take this code path");
if (StyleEffects()->mOpacity == 0.0) {
return;
}
nsIFrame* kid = GetActiveChildFrame();
if (kid) {
gfxMatrix tm = aTransform;
if (kid->GetContent()->IsSVGElement()) {
tm = SVGUtils::GetTransformMatrixInUserSpace(kid) * tm;
}
SVGUtils::PaintFrameWithEffects(kid, aContext, tm, aImgParams, aDirtyRect);
}
}
nsIFrame* SVGSwitchFrame::GetFrameForPoint(const gfxPoint& aPoint) {
NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
(mState & NS_FRAME_IS_NONDISPLAY),
"If display lists are enabled, only hit-testing of non-display "
"SVG should take this code path");
nsIFrame* kid = GetActiveChildFrame();
ISVGDisplayableFrame* svgFrame = do_QueryFrame(kid);
if (svgFrame) {
// Transform the point from our SVG user space to our child's.
gfxPoint point = aPoint;
gfxMatrix m =
static_cast<const SVGElement*>(GetContent())
->PrependLocalTransformsTo(gfxMatrix(), eChildToUserSpace);
m = static_cast<const SVGElement*>(kid->GetContent())
->PrependLocalTransformsTo(m, eUserSpaceToParent);
if (!m.IsIdentity()) {
if (!m.Invert()) {
return nullptr;
}
point = m.TransformPoint(point);
}
return svgFrame->GetFrameForPoint(point);
}
return nullptr;
}
static bool shouldReflowSVGTextFrameInside(nsIFrame* aFrame) {
return aFrame->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer) ||
aFrame->IsSVGForeignObjectFrame() ||
!aFrame->IsFrameOfType(nsIFrame::eSVG);
}
void SVGSwitchFrame::AlwaysReflowSVGTextFrameDoForOneKid(nsIFrame* aKid) {
if (!aKid->IsSubtreeDirty()) {
return;
}
if (aKid->IsSVGTextFrame()) {
MOZ_ASSERT(!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
"A non-display SVGTextFrame directly contained in a display "
"container?");
static_cast<SVGTextFrame*>(aKid)->ReflowSVG();
} else if (shouldReflowSVGTextFrameInside(aKid)) {
if (!aKid->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
for (nsIFrame* kid : aKid->PrincipalChildList()) {
AlwaysReflowSVGTextFrameDoForOneKid(kid);
}
} else {
// This child is in a nondisplay context, something like:
// <switch>
// ...
// <g><mask><text></text></mask></g>
// </switch>
// We should not call ReflowSVG on it.
SVGContainerFrame::ReflowSVGNonDisplayText(aKid);
}
}
}
void SVGSwitchFrame::ReflowAllSVGTextFramesInsideNonActiveChildren(
nsIFrame* aActiveChild) {
for (nsIFrame* kid = mFrames.FirstChild(); kid; kid = kid->GetNextSibling()) {
if (aActiveChild == kid) {
continue;
}
AlwaysReflowSVGTextFrameDoForOneKid(kid);
}
}
void SVGSwitchFrame::ReflowSVG() {
NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this),
"This call is probably a wasteful mistake");
MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
"ReflowSVG mechanism not designed for this");
if (!SVGUtils::NeedsReflowSVG(this)) {
return;
}
// If the NS_FRAME_FIRST_REFLOW bit has been removed from our parent frame,
// then our outer-<svg> has previously had its initial reflow. In that case
// we need to make sure that that bit has been removed from ourself _before_
// recursing over our children to ensure that they know too. Otherwise, we
// need to remove it _after_ recursing over our children so that they know
// the initial reflow is currently underway.
bool isFirstReflow = (mState & NS_FRAME_FIRST_REFLOW);
bool outerSVGHasHadFirstReflow =
!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
if (outerSVGHasHadFirstReflow) {
RemoveStateBits(NS_FRAME_FIRST_REFLOW); // tell our children
}
OverflowAreas overflowRects;
nsIFrame* child = GetActiveChildFrame();
ReflowAllSVGTextFramesInsideNonActiveChildren(child);
ISVGDisplayableFrame* svgChild = do_QueryFrame(child);
if (svgChild) {
MOZ_ASSERT(!child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
"Check for this explicitly in the |if|, then");
svgChild->ReflowSVG();
// We build up our child frame overflows here instead of using
// nsLayoutUtils::UnionChildOverflow since SVG frame's all use the same
// frame list, and we're iterating over that list now anyway.
ConsiderChildOverflow(overflowRects, child);
} else if (child && shouldReflowSVGTextFrameInside(child)) {
MOZ_ASSERT(child->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY) ||
!child->IsFrameOfType(nsIFrame::eSVG),
"Check for this explicitly in the |if|, then");
ReflowSVGNonDisplayText(child);
}
if (isFirstReflow) {
// Make sure we have our filter property (if any) before calling
// FinishAndStoreOverflow (subsequent filter changes are handled off
// nsChangeHint_UpdateEffects):
SVGObserverUtils::UpdateEffects(this);
}
FinishAndStoreOverflow(overflowRects, mRect.Size());
// Remove state bits after FinishAndStoreOverflow so that it doesn't
// invalidate on first reflow:
RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
}
SVGBBox SVGSwitchFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags) {
nsIFrame* kid = GetActiveChildFrame();
ISVGDisplayableFrame* svgKid = do_QueryFrame(kid);
if (svgKid) {
nsIContent* content = kid->GetContent();
gfxMatrix transform = ThebesMatrix(aToBBoxUserspace);
if (content->IsSVGElement()) {
transform = static_cast<SVGElement*>(content)->PrependLocalTransformsTo(
{}, eChildToUserSpace) *
SVGUtils::GetTransformMatrixInUserSpace(kid) * transform;
}
return svgKid->GetBBoxContribution(ToMatrix(transform), aFlags);
}
return SVGBBox();
}
nsIFrame* SVGSwitchFrame::GetActiveChildFrame() {
nsIContent* activeChild =
static_cast<dom::SVGSwitchElement*>(GetContent())->GetActiveChild();
if (activeChild) {
for (nsIFrame* kid = mFrames.FirstChild(); kid;
kid = kid->GetNextSibling()) {
if (activeChild == kid->GetContent()) {
return kid;
}
}
}
return nullptr;
}
} // namespace mozilla