1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGMarkerFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,272 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +// Main header first:
1.10 +#include "nsSVGMarkerFrame.h"
1.11 +
1.12 +// Keep others in (case-insensitive) order:
1.13 +#include "gfxContext.h"
1.14 +#include "nsRenderingContext.h"
1.15 +#include "nsSVGEffects.h"
1.16 +#include "mozilla/dom/SVGMarkerElement.h"
1.17 +#include "nsSVGPathGeometryElement.h"
1.18 +#include "nsSVGPathGeometryFrame.h"
1.19 +
1.20 +using namespace mozilla::dom;
1.21 +using namespace mozilla::gfx;
1.22 +
1.23 +nsIFrame*
1.24 +NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.25 +{
1.26 + return new (aPresShell) nsSVGMarkerFrame(aContext);
1.27 +}
1.28 +
1.29 +NS_IMPL_FRAMEARENA_HELPERS(nsSVGMarkerFrame)
1.30 +
1.31 +//----------------------------------------------------------------------
1.32 +// nsIFrame methods:
1.33 +
1.34 +nsresult
1.35 +nsSVGMarkerFrame::AttributeChanged(int32_t aNameSpaceID,
1.36 + nsIAtom* aAttribute,
1.37 + int32_t aModType)
1.38 +{
1.39 + if (aNameSpaceID == kNameSpaceID_None &&
1.40 + (aAttribute == nsGkAtoms::markerUnits ||
1.41 + aAttribute == nsGkAtoms::refX ||
1.42 + aAttribute == nsGkAtoms::refY ||
1.43 + aAttribute == nsGkAtoms::markerWidth ||
1.44 + aAttribute == nsGkAtoms::markerHeight ||
1.45 + aAttribute == nsGkAtoms::orient ||
1.46 + aAttribute == nsGkAtoms::preserveAspectRatio ||
1.47 + aAttribute == nsGkAtoms::viewBox)) {
1.48 + nsSVGEffects::InvalidateDirectRenderingObservers(this);
1.49 + }
1.50 +
1.51 + return nsSVGMarkerFrameBase::AttributeChanged(aNameSpaceID,
1.52 + aAttribute, aModType);
1.53 +}
1.54 +
1.55 +#ifdef DEBUG
1.56 +void
1.57 +nsSVGMarkerFrame::Init(nsIContent* aContent,
1.58 + nsIFrame* aParent,
1.59 + nsIFrame* aPrevInFlow)
1.60 +{
1.61 + NS_ASSERTION(aContent->IsSVG(nsGkAtoms::marker), "Content is not an SVG marker");
1.62 +
1.63 + nsSVGMarkerFrameBase::Init(aContent, aParent, aPrevInFlow);
1.64 +}
1.65 +#endif /* DEBUG */
1.66 +
1.67 +nsIAtom *
1.68 +nsSVGMarkerFrame::GetType() const
1.69 +{
1.70 + return nsGkAtoms::svgMarkerFrame;
1.71 +}
1.72 +
1.73 +//----------------------------------------------------------------------
1.74 +// nsSVGContainerFrame methods:
1.75 +
1.76 +gfxMatrix
1.77 +nsSVGMarkerFrame::GetCanvasTM(uint32_t aFor, nsIFrame* aTransformRoot)
1.78 +{
1.79 + NS_ASSERTION(mMarkedFrame, "null nsSVGPathGeometry frame");
1.80 +
1.81 + if (mInUse2) {
1.82 + // We're going to be bailing drawing the marker, so return an identity.
1.83 + return gfxMatrix();
1.84 + }
1.85 +
1.86 + SVGMarkerElement *content = static_cast<SVGMarkerElement*>(mContent);
1.87 +
1.88 + mInUse2 = true;
1.89 + gfxMatrix markedTM = mMarkedFrame->GetCanvasTM(aFor, aTransformRoot);
1.90 + mInUse2 = false;
1.91 +
1.92 + Matrix markerTM = content->GetMarkerTransform(mStrokeWidth, mX, mY,
1.93 + mAutoAngle, mIsStart);
1.94 + Matrix viewBoxTM = content->GetViewBoxTransform();
1.95 +
1.96 + return ThebesMatrix(viewBoxTM * markerTM) * markedTM;
1.97 +}
1.98 +
1.99 +static nsIFrame*
1.100 +GetAnonymousChildFrame(nsIFrame* aFrame)
1.101 +{
1.102 + nsIFrame* kid = aFrame->GetFirstPrincipalChild();
1.103 + MOZ_ASSERT(kid && kid->GetType() == nsGkAtoms::svgMarkerAnonChildFrame,
1.104 + "expected to find anonymous child of marker frame");
1.105 + return kid;
1.106 +}
1.107 +
1.108 +nsresult
1.109 +nsSVGMarkerFrame::PaintMark(nsRenderingContext *aContext,
1.110 + nsSVGPathGeometryFrame *aMarkedFrame,
1.111 + nsSVGMark *aMark, float aStrokeWidth)
1.112 +{
1.113 + // If the flag is set when we get here, it means this marker frame
1.114 + // has already been used painting the current mark, and the document
1.115 + // has a marker reference loop.
1.116 + if (mInUse)
1.117 + return NS_OK;
1.118 +
1.119 + AutoMarkerReferencer markerRef(this, aMarkedFrame);
1.120 +
1.121 + SVGMarkerElement *marker = static_cast<SVGMarkerElement*>(mContent);
1.122 + if (!marker->HasValidDimensions()) {
1.123 + return NS_OK;
1.124 + }
1.125 +
1.126 + const nsSVGViewBoxRect viewBox = marker->GetViewBoxRect();
1.127 +
1.128 + if (viewBox.width <= 0.0f || viewBox.height <= 0.0f) {
1.129 + // We must disable rendering if the viewBox width or height are zero.
1.130 + return NS_OK;
1.131 + }
1.132 +
1.133 + mStrokeWidth = aStrokeWidth;
1.134 + mX = aMark->x;
1.135 + mY = aMark->y;
1.136 + mAutoAngle = aMark->angle;
1.137 + mIsStart = aMark->type == nsSVGMark::eStart;
1.138 +
1.139 + gfxContext *gfx = aContext->ThebesContext();
1.140 +
1.141 + if (StyleDisplay()->IsScrollableOverflow()) {
1.142 + gfx->Save();
1.143 + gfxRect clipRect =
1.144 + nsSVGUtils::GetClipRectForFrame(this, viewBox.x, viewBox.y,
1.145 + viewBox.width, viewBox.height);
1.146 + nsSVGUtils::SetClipRect(gfx, GetCanvasTM(nsISVGChildFrame::FOR_PAINTING),
1.147 + clipRect);
1.148 + }
1.149 +
1.150 + nsIFrame* kid = GetAnonymousChildFrame(this);
1.151 + nsISVGChildFrame* SVGFrame = do_QueryFrame(kid);
1.152 + // The CTM of each frame referencing us may be different.
1.153 + SVGFrame->NotifySVGChanged(nsISVGChildFrame::TRANSFORM_CHANGED);
1.154 + nsSVGUtils::PaintFrameWithEffects(aContext, nullptr, kid);
1.155 +
1.156 + if (StyleDisplay()->IsScrollableOverflow())
1.157 + gfx->Restore();
1.158 +
1.159 + return NS_OK;
1.160 +}
1.161 +
1.162 +SVGBBox
1.163 +nsSVGMarkerFrame::GetMarkBBoxContribution(const Matrix &aToBBoxUserspace,
1.164 + uint32_t aFlags,
1.165 + nsSVGPathGeometryFrame *aMarkedFrame,
1.166 + const nsSVGMark *aMark,
1.167 + float aStrokeWidth)
1.168 +{
1.169 + SVGBBox bbox;
1.170 +
1.171 + // If the flag is set when we get here, it means this marker frame
1.172 + // has already been used in calculating the current mark bbox, and
1.173 + // the document has a marker reference loop.
1.174 + if (mInUse)
1.175 + return bbox;
1.176 +
1.177 + AutoMarkerReferencer markerRef(this, aMarkedFrame);
1.178 +
1.179 + SVGMarkerElement *content = static_cast<SVGMarkerElement*>(mContent);
1.180 + if (!content->HasValidDimensions()) {
1.181 + return bbox;
1.182 + }
1.183 +
1.184 + const nsSVGViewBoxRect viewBox = content->GetViewBoxRect();
1.185 +
1.186 + if (viewBox.width <= 0.0f || viewBox.height <= 0.0f) {
1.187 + return bbox;
1.188 + }
1.189 +
1.190 + mStrokeWidth = aStrokeWidth;
1.191 + mX = aMark->x;
1.192 + mY = aMark->y;
1.193 + mAutoAngle = aMark->angle;
1.194 + mIsStart = aMark->type == nsSVGMark::eStart;
1.195 +
1.196 + Matrix markerTM =
1.197 + content->GetMarkerTransform(mStrokeWidth, mX, mY, mAutoAngle, mIsStart);
1.198 + Matrix viewBoxTM = content->GetViewBoxTransform();
1.199 +
1.200 + Matrix tm = viewBoxTM * markerTM * aToBBoxUserspace;
1.201 +
1.202 + nsISVGChildFrame* child = do_QueryFrame(GetAnonymousChildFrame(this));
1.203 + // When we're being called to obtain the invalidation area, we need to
1.204 + // pass down all the flags so that stroke is included. However, once DOM
1.205 + // getBBox() accepts flags, maybe we should strip some of those here?
1.206 +
1.207 + // We need to include zero width/height vertical/horizontal lines, so we have
1.208 + // to use UnionEdges.
1.209 + bbox.UnionEdges(child->GetBBoxContribution(tm, aFlags));
1.210 +
1.211 + return bbox;
1.212 +}
1.213 +
1.214 +void
1.215 +nsSVGMarkerFrame::SetParentCoordCtxProvider(SVGSVGElement *aContext)
1.216 +{
1.217 + SVGMarkerElement *marker = static_cast<SVGMarkerElement*>(mContent);
1.218 + marker->SetParentCoordCtxProvider(aContext);
1.219 +}
1.220 +
1.221 +//----------------------------------------------------------------------
1.222 +// helper class
1.223 +
1.224 +nsSVGMarkerFrame::AutoMarkerReferencer::AutoMarkerReferencer(
1.225 + nsSVGMarkerFrame *aFrame,
1.226 + nsSVGPathGeometryFrame *aMarkedFrame
1.227 + MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
1.228 + : mFrame(aFrame)
1.229 +{
1.230 + MOZ_GUARD_OBJECT_NOTIFIER_INIT;
1.231 + mFrame->mInUse = true;
1.232 + mFrame->mMarkedFrame = aMarkedFrame;
1.233 +
1.234 + SVGSVGElement *ctx =
1.235 + static_cast<nsSVGElement*>(aMarkedFrame->GetContent())->GetCtx();
1.236 + mFrame->SetParentCoordCtxProvider(ctx);
1.237 +}
1.238 +
1.239 +nsSVGMarkerFrame::AutoMarkerReferencer::~AutoMarkerReferencer()
1.240 +{
1.241 + mFrame->SetParentCoordCtxProvider(nullptr);
1.242 +
1.243 + mFrame->mMarkedFrame = nullptr;
1.244 + mFrame->mInUse = false;
1.245 +}
1.246 +
1.247 +//----------------------------------------------------------------------
1.248 +// Implementation of nsSVGMarkerAnonChildFrame
1.249 +
1.250 +nsIFrame*
1.251 +NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell,
1.252 + nsStyleContext* aContext)
1.253 +{
1.254 + return new (aPresShell) nsSVGMarkerAnonChildFrame(aContext);
1.255 +}
1.256 +
1.257 +NS_IMPL_FRAMEARENA_HELPERS(nsSVGMarkerAnonChildFrame)
1.258 +
1.259 +#ifdef DEBUG
1.260 +void
1.261 +nsSVGMarkerAnonChildFrame::Init(nsIContent* aContent,
1.262 + nsIFrame* aParent,
1.263 + nsIFrame* aPrevInFlow)
1.264 +{
1.265 + NS_ABORT_IF_FALSE(aParent->GetType() == nsGkAtoms::svgMarkerFrame,
1.266 + "Unexpected parent");
1.267 + nsSVGMarkerAnonChildFrameBase::Init(aContent, aParent, aPrevInFlow);
1.268 +}
1.269 +#endif
1.270 +
1.271 +nsIAtom *
1.272 +nsSVGMarkerAnonChildFrame::GetType() const
1.273 +{
1.274 + return nsGkAtoms::svgMarkerAnonChildFrame;
1.275 +}
