diff options
Diffstat (limited to 'layout/svg/SVGMarkerFrame.cpp')
| -rw-r--r-- | layout/svg/SVGMarkerFrame.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/layout/svg/SVGMarkerFrame.cpp b/layout/svg/SVGMarkerFrame.cpp new file mode 100644 index 0000000000..16c8869fa0 --- /dev/null +++ b/layout/svg/SVGMarkerFrame.cpp @@ -0,0 +1,245 @@ +/* -*- 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::InvalidateDirectRenderingObservers(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 |