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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/. */
// Main header first:
#include "SVGMarkerFrame.h"
// Keep others in (case-insensitive) order:
#include "gfxContext.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGContextPaint.h"
#include "mozilla/SVGGeometryFrame.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/SVGGeometryElement.h"
#include "mozilla/dom/SVGMarkerElement.h"
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
nsContainerFrame* NS_NewSVGMarkerFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGMarkerFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGMarkerFrame)
//----------------------------------------------------------------------
// nsIFrame methods:
nsresult SVGMarkerFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::markerUnits || aAttribute == nsGkAtoms::refX ||
aAttribute == nsGkAtoms::refY || aAttribute == nsGkAtoms::markerWidth ||
aAttribute == nsGkAtoms::markerHeight ||
aAttribute == nsGkAtoms::orient ||
aAttribute == nsGkAtoms::preserveAspectRatio ||
aAttribute == nsGkAtoms::viewBox)) {
SVGObserverUtils::InvalidateRenderingObservers(this);
}
return SVGContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
}
#ifdef DEBUG
void SVGMarkerFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::marker),
"Content is not an SVG marker");
SVGContainerFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
//----------------------------------------------------------------------
// SVGContainerFrame methods:
gfxMatrix SVGMarkerFrame::GetCanvasTM() {
NS_ASSERTION(mMarkedFrame, "null SVGGeometry frame");
if (mInUse2) {
// We're going to be bailing drawing the marker, so return an identity.
return gfxMatrix();
}
SVGMarkerElement* content = static_cast<SVGMarkerElement*>(GetContent());
mInUse2 = true;
gfxMatrix markedTM = mMarkedFrame->GetCanvasTM();
mInUse2 = false;
Matrix viewBoxTM = content->GetViewBoxTransform();
return ThebesMatrix(viewBoxTM * mMarkerTM) * markedTM;
}
static nsIFrame* GetAnonymousChildFrame(nsIFrame* aFrame) {
nsIFrame* kid = aFrame->PrincipalChildList().FirstChild();
MOZ_ASSERT(kid && kid->IsSVGMarkerAnonChildFrame(),
"expected to find anonymous child of marker frame");
return kid;
}
void SVGMarkerFrame::PaintMark(gfxContext& aContext,
const gfxMatrix& aToMarkedFrameUserSpace,
SVGGeometryFrame* aMarkedFrame,
const SVGMark& aMark, float aStrokeWidth,
imgDrawingParams& aImgParams) {
// If the flag is set when we get here, it means this marker frame
// has already been used painting the current mark, and the document
// has a marker reference loop.
if (mInUse) {
return;
}
AutoMarkerReferencer markerRef(this, aMarkedFrame);
SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(GetContent());
if (!marker->HasValidDimensions()) {
return;
}
const SVGViewBox viewBox = marker->GetViewBox();
if (viewBox.width <= 0.0f || viewBox.height <= 0.0f) {
// We must disable rendering if the viewBox width or height are zero.
return;
}
Matrix viewBoxTM = marker->GetViewBoxTransform();
mMarkerTM = marker->GetMarkerTransform(aStrokeWidth, aMark);
gfxMatrix markTM = ThebesMatrix(viewBoxTM) * ThebesMatrix(mMarkerTM) *
aToMarkedFrameUserSpace;
gfxClipAutoSaveRestore autoSaveClip(&aContext);
if (StyleDisplay()->IsScrollableOverflow()) {
gfxRect clipRect = SVGUtils::GetClipRectForFrame(
this, viewBox.x, viewBox.y, viewBox.width, viewBox.height);
autoSaveClip.TransformedClip(markTM, clipRect);
}
nsIFrame* kid = GetAnonymousChildFrame(this);
ISVGDisplayableFrame* SVGFrame = do_QueryFrame(kid);
// The CTM of each frame referencing us may be different.
SVGFrame->NotifySVGChanged(ISVGDisplayableFrame::TRANSFORM_CHANGED);
RefPtr<SVGContextPaintImpl> contextPaint = new SVGContextPaintImpl();
contextPaint->Init(aContext.GetDrawTarget(), aContext.CurrentMatrixDouble(),
aMarkedFrame, SVGContextPaint::GetContextPaint(marker),
aImgParams);
AutoSetRestoreSVGContextPaint autoSetRestore(contextPaint,
marker->OwnerDoc());
SVGUtils::PaintFrameWithEffects(kid, aContext, markTM, aImgParams);
}
SVGBBox SVGMarkerFrame::GetMarkBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags,
SVGGeometryFrame* aMarkedFrame,
const SVGMark& aMark,
float aStrokeWidth) {
SVGBBox bbox;
// If the flag is set when we get here, it means this marker frame
// has already been used in calculating the current mark bbox, and
// the document has a marker reference loop.
if (mInUse) {
return bbox;
}
AutoMarkerReferencer markerRef(this, aMarkedFrame);
SVGMarkerElement* content = static_cast<SVGMarkerElement*>(GetContent());
if (!content->HasValidDimensions()) {
return bbox;
}
const SVGViewBox viewBox = content->GetViewBox();
if (viewBox.width <= 0.0f || viewBox.height <= 0.0f) {
return bbox;
}
mMarkerTM = content->GetMarkerTransform(aStrokeWidth, aMark);
Matrix viewBoxTM = content->GetViewBoxTransform();
Matrix tm = viewBoxTM * mMarkerTM * aToBBoxUserspace;
ISVGDisplayableFrame* child = do_QueryFrame(GetAnonymousChildFrame(this));
// When we're being called to obtain the invalidation area, we need to
// pass down all the flags so that stroke is included. However, once DOM
// getBBox() accepts flags, maybe we should strip some of those here?
// We need to include zero width/height vertical/horizontal lines, so we have
// to use UnionEdges.
bbox.UnionEdges(child->GetBBoxContribution(tm, aFlags));
return bbox;
}
void SVGMarkerFrame::SetParentCoordCtxProvider(SVGViewportElement* aContext) {
SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(GetContent());
marker->SetParentCoordCtxProvider(aContext);
}
void SVGMarkerFrame::AppendDirectlyOwnedAnonBoxes(
nsTArray<OwnedAnonBox>& aResult) {
aResult.AppendElement(OwnedAnonBox(GetAnonymousChildFrame(this)));
}
//----------------------------------------------------------------------
// helper class
SVGMarkerFrame::AutoMarkerReferencer::AutoMarkerReferencer(
SVGMarkerFrame* aFrame, SVGGeometryFrame* aMarkedFrame)
: mFrame(aFrame) {
mFrame->mInUse = true;
mFrame->mMarkedFrame = aMarkedFrame;
SVGViewportElement* ctx =
static_cast<SVGElement*>(aMarkedFrame->GetContent())->GetCtx();
mFrame->SetParentCoordCtxProvider(ctx);
}
SVGMarkerFrame::AutoMarkerReferencer::~AutoMarkerReferencer() {
mFrame->SetParentCoordCtxProvider(nullptr);
mFrame->mMarkedFrame = nullptr;
mFrame->mInUse = false;
}
} // namespace mozilla
//----------------------------------------------------------------------
// Implementation of SVGMarkerAnonChildFrame
nsContainerFrame* NS_NewSVGMarkerAnonChildFrame(
mozilla::PresShell* aPresShell, mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGMarkerAnonChildFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGMarkerAnonChildFrame)
#ifdef DEBUG
void SVGMarkerAnonChildFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
MOZ_ASSERT(aParent->IsSVGMarkerFrame(), "Unexpected parent");
SVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif
} // namespace mozilla
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