Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 403 insertions, 0 deletions

diff --git a/dom/svg/SVGPathElement.cpp b/dom/svg/SVGPathElement.cpp
new file mode 100644
index 0000000000..b3fb7af260
--- /dev/null
+++ b/dom/svg/SVGPathElement.cpp
@@ -0,0 +1,403 @@
+/* -*- 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/. */
+
+#include "mozilla/dom/SVGPathElement.h"
+
+#include <algorithm>
+
+#include "DOMSVGPathSeg.h"
+#include "DOMSVGPathSegList.h"
+#include "SVGGeometryProperty.h"
+#include "gfx2DGlue.h"
+#include "gfxPlatform.h"
+#include "nsGkAtoms.h"
+#include "nsIFrame.h"
+#include "nsStyleConsts.h"
+#include "nsStyleStruct.h"
+#include "nsWindowSizes.h"
+#include "mozilla/dom/SVGPathElementBinding.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/SVGContentUtils.h"
+
+NS_IMPL_NS_NEW_SVG_ELEMENT(Path)
+
+using namespace mozilla::gfx;
+
+namespace mozilla::dom {
+
+JSObject* SVGPathElement::WrapNode(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return SVGPathElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGPathElement::SVGPathElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : SVGPathElementBase(std::move(aNodeInfo)) {}
+
+//----------------------------------------------------------------------
+// memory reporting methods
+
+void SVGPathElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
+                                            size_t* aNodeSize) const {
+  SVGPathElementBase::AddSizeOfExcludingThis(aSizes, aNodeSize);
+  *aNodeSize += mD.SizeOfExcludingThis(aSizes.mState.mMallocSizeOf);
+}
+
+//----------------------------------------------------------------------
+// nsINode methods
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGPathElement)
+
+uint32_t SVGPathElement::GetPathSegAtLength(float distance) {
+  uint32_t seg = 0;
+  auto callback = [&](const ComputedStyle* s) {
+    const nsStyleSVGReset* styleSVGReset = s->StyleSVGReset();
+    if (styleSVGReset->mD.IsPath()) {
+      seg = SVGPathData::GetPathSegAtLength(
+          styleSVGReset->mD.AsPath()._0.AsSpan(), distance);
+    }
+  };
+
+  if (StaticPrefs::layout_css_d_property_enabled()) {
+    FlushStyleIfNeeded();
+    if (SVGGeometryProperty::DoForComputedStyle(this, callback)) {
+      return seg;
+    }
+  }
+  return mD.GetAnimValue().GetPathSegAtLength(distance);
+}
+
+already_AddRefed<DOMSVGPathSegClosePath>
+SVGPathElement::CreateSVGPathSegClosePath() {
+  RefPtr<DOMSVGPathSegClosePath> pathSeg = new DOMSVGPathSegClosePath();
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegMovetoAbs>
+SVGPathElement::CreateSVGPathSegMovetoAbs(float x, float y) {
+  RefPtr<DOMSVGPathSegMovetoAbs> pathSeg = new DOMSVGPathSegMovetoAbs(x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegMovetoRel>
+SVGPathElement::CreateSVGPathSegMovetoRel(float x, float y) {
+  RefPtr<DOMSVGPathSegMovetoRel> pathSeg = new DOMSVGPathSegMovetoRel(x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoAbs>
+SVGPathElement::CreateSVGPathSegLinetoAbs(float x, float y) {
+  RefPtr<DOMSVGPathSegLinetoAbs> pathSeg = new DOMSVGPathSegLinetoAbs(x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoRel>
+SVGPathElement::CreateSVGPathSegLinetoRel(float x, float y) {
+  RefPtr<DOMSVGPathSegLinetoRel> pathSeg = new DOMSVGPathSegLinetoRel(x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoCubicAbs>
+SVGPathElement::CreateSVGPathSegCurvetoCubicAbs(float x, float y, float x1,
+                                                float y1, float x2, float y2) {
+  // Note that we swap from DOM API argument order to the argument order used
+  // in the <path> element's 'd' attribute (i.e. we put the arguments for the
+  // end point of the segment last instead of first).
+  RefPtr<DOMSVGPathSegCurvetoCubicAbs> pathSeg =
+      new DOMSVGPathSegCurvetoCubicAbs(x1, y1, x2, y2, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoCubicRel>
+SVGPathElement::CreateSVGPathSegCurvetoCubicRel(float x, float y, float x1,
+                                                float y1, float x2, float y2) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegCurvetoCubicRel> pathSeg =
+      new DOMSVGPathSegCurvetoCubicRel(x1, y1, x2, y2, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoQuadraticAbs>
+SVGPathElement::CreateSVGPathSegCurvetoQuadraticAbs(float x, float y, float x1,
+                                                    float y1) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegCurvetoQuadraticAbs> pathSeg =
+      new DOMSVGPathSegCurvetoQuadraticAbs(x1, y1, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoQuadraticRel>
+SVGPathElement::CreateSVGPathSegCurvetoQuadraticRel(float x, float y, float x1,
+                                                    float y1) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegCurvetoQuadraticRel> pathSeg =
+      new DOMSVGPathSegCurvetoQuadraticRel(x1, y1, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegArcAbs> SVGPathElement::CreateSVGPathSegArcAbs(
+    float x, float y, float r1, float r2, float angle, bool largeArcFlag,
+    bool sweepFlag) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegArcAbs> pathSeg =
+      new DOMSVGPathSegArcAbs(r1, r2, angle, largeArcFlag, sweepFlag, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegArcRel> SVGPathElement::CreateSVGPathSegArcRel(
+    float x, float y, float r1, float r2, float angle, bool largeArcFlag,
+    bool sweepFlag) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegArcRel> pathSeg =
+      new DOMSVGPathSegArcRel(r1, r2, angle, largeArcFlag, sweepFlag, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoHorizontalAbs>
+SVGPathElement::CreateSVGPathSegLinetoHorizontalAbs(float x) {
+  RefPtr<DOMSVGPathSegLinetoHorizontalAbs> pathSeg =
+      new DOMSVGPathSegLinetoHorizontalAbs(x);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoHorizontalRel>
+SVGPathElement::CreateSVGPathSegLinetoHorizontalRel(float x) {
+  RefPtr<DOMSVGPathSegLinetoHorizontalRel> pathSeg =
+      new DOMSVGPathSegLinetoHorizontalRel(x);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoVerticalAbs>
+SVGPathElement::CreateSVGPathSegLinetoVerticalAbs(float y) {
+  RefPtr<DOMSVGPathSegLinetoVerticalAbs> pathSeg =
+      new DOMSVGPathSegLinetoVerticalAbs(y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegLinetoVerticalRel>
+SVGPathElement::CreateSVGPathSegLinetoVerticalRel(float y) {
+  RefPtr<DOMSVGPathSegLinetoVerticalRel> pathSeg =
+      new DOMSVGPathSegLinetoVerticalRel(y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoCubicSmoothAbs>
+SVGPathElement::CreateSVGPathSegCurvetoCubicSmoothAbs(float x, float y,
+                                                      float x2, float y2) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegCurvetoCubicSmoothAbs> pathSeg =
+      new DOMSVGPathSegCurvetoCubicSmoothAbs(x2, y2, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoCubicSmoothRel>
+SVGPathElement::CreateSVGPathSegCurvetoCubicSmoothRel(float x, float y,
+                                                      float x2, float y2) {
+  // See comment in CreateSVGPathSegCurvetoCubicAbs
+  RefPtr<DOMSVGPathSegCurvetoCubicSmoothRel> pathSeg =
+      new DOMSVGPathSegCurvetoCubicSmoothRel(x2, y2, x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoQuadraticSmoothAbs>
+SVGPathElement::CreateSVGPathSegCurvetoQuadraticSmoothAbs(float x, float y) {
+  RefPtr<DOMSVGPathSegCurvetoQuadraticSmoothAbs> pathSeg =
+      new DOMSVGPathSegCurvetoQuadraticSmoothAbs(x, y);
+  return pathSeg.forget();
+}
+
+already_AddRefed<DOMSVGPathSegCurvetoQuadraticSmoothRel>
+SVGPathElement::CreateSVGPathSegCurvetoQuadraticSmoothRel(float x, float y) {
+  RefPtr<DOMSVGPathSegCurvetoQuadraticSmoothRel> pathSeg =
+      new DOMSVGPathSegCurvetoQuadraticSmoothRel(x, y);
+  return pathSeg.forget();
+}
+
+// FIXME: This API is enabled only if dom.svg.pathSeg.enabled is true. This
+// preference is off by default in Bug 1388931, and will be dropped later.
+// So we are not planning to map d property for this API.
+already_AddRefed<DOMSVGPathSegList> SVGPathElement::PathSegList() {
+  return DOMSVGPathSegList::GetDOMWrapper(mD.GetBaseValKey(), this, false);
+}
+
+// FIXME: This API is enabled only if dom.svg.pathSeg.enabled is true. This
+// preference is off by default in Bug 1388931, and will be dropped later.
+// So we are not planning to map d property for this API.
+already_AddRefed<DOMSVGPathSegList> SVGPathElement::AnimatedPathSegList() {
+  return DOMSVGPathSegList::GetDOMWrapper(mD.GetAnimValKey(), this, true);
+}
+
+//----------------------------------------------------------------------
+// SVGElement methods
+
+/* virtual */
+bool SVGPathElement::HasValidDimensions() const {
+  bool hasPath = false;
+  auto callback = [&](const ComputedStyle* s) {
+    const nsStyleSVGReset* styleSVGReset = s->StyleSVGReset();
+    hasPath =
+        styleSVGReset->mD.IsPath() && !styleSVGReset->mD.AsPath()._0.IsEmpty();
+  };
+
+  SVGGeometryProperty::DoForComputedStyle(this, callback);
+  // If hasPath is false, we may disable the pref of d property, so we fallback
+  // to check mD.
+  return hasPath || !mD.GetAnimValue().IsEmpty();
+}
+
+//----------------------------------------------------------------------
+// nsIContent methods
+
+NS_IMETHODIMP_(bool)
+SVGPathElement::IsAttributeMapped(const nsAtom* name) const {
+  static const MappedAttributeEntry* const map[] = {sMarkersMap};
+
+  return FindAttributeDependence(name, map) ||
+         (StaticPrefs::layout_css_d_property_enabled() &&
+          name == nsGkAtoms::d) ||
+         SVGPathElementBase::IsAttributeMapped(name);
+}
+
+already_AddRefed<Path> SVGPathElement::GetOrBuildPathForMeasuring() {
+  if (!StaticPrefs::layout_css_d_property_enabled()) {
+    return mD.GetAnimValue().BuildPathForMeasuring();
+  }
+
+  // FIXME: Bug 1715387, the IDL methods should flush style, but internal
+  // callers shouldn't. We have to make sure we flush the style well from the
+  // caller.
+
+  RefPtr<Path> path;
+  bool success = SVGGeometryProperty::DoForComputedStyle(
+      this, [&path](const ComputedStyle* s) {
+        const auto& d = s->StyleSVGReset()->mD;
+        if (d.IsNone()) {
+          return;
+        }
+        path = SVGPathData::BuildPathForMeasuring(d.AsPath()._0.AsSpan());
+      });
+  return success ? path.forget() : mD.GetAnimValue().BuildPathForMeasuring();
+}
+
+//----------------------------------------------------------------------
+// SVGGeometryElement methods
+
+bool SVGPathElement::AttributeDefinesGeometry(const nsAtom* aName) {
+  return aName == nsGkAtoms::d || aName == nsGkAtoms::pathLength;
+}
+
+bool SVGPathElement::IsMarkable() { return true; }
+
+void SVGPathElement::GetMarkPoints(nsTArray<SVGMark>* aMarks) {
+  auto callback = [aMarks](const ComputedStyle* s) {
+    const nsStyleSVGReset* styleSVGReset = s->StyleSVGReset();
+    if (styleSVGReset->mD.IsPath()) {
+      Span<const StylePathCommand> path =
+          styleSVGReset->mD.AsPath()._0.AsSpan();
+      SVGPathData::GetMarkerPositioningData(path, aMarks);
+    }
+  };
+
+  if (StaticPrefs::layout_css_d_property_enabled() &&
+      SVGGeometryProperty::DoForComputedStyle(this, callback)) {
+    return;
+  }
+
+  mD.GetAnimValue().GetMarkerPositioningData(aMarks);
+}
+
+void SVGPathElement::GetAsSimplePath(SimplePath* aSimplePath) {
+  aSimplePath->Reset();
+  auto callback = [&](const ComputedStyle* s) {
+    const nsStyleSVGReset* styleSVGReset = s->StyleSVGReset();
+    if (styleSVGReset->mD.IsPath()) {
+      auto pathData = styleSVGReset->mD.AsPath()._0.AsSpan();
+      auto maybeRect = SVGPathToAxisAlignedRect(pathData);
+      if (maybeRect.isSome()) {
+        Rect r = maybeRect.value();
+        aSimplePath->SetRect(r.x, r.y, r.width, r.height);
+      }
+    }
+  };
+
+  SVGGeometryProperty::DoForComputedStyle(this, callback);
+}
+
+already_AddRefed<Path> SVGPathElement::BuildPath(PathBuilder* aBuilder) {
+  // The Moz2D PathBuilder that our SVGPathData will be using only cares about
+  // the fill rule. However, in order to fulfill the requirements of the SVG
+  // spec regarding zero length sub-paths when square line caps are in use,
+  // SVGPathData needs to know our stroke-linecap style and, if "square", then
+  // also our stroke width. See the comment for
+  // ApproximateZeroLengthSubpathSquareCaps for more info.
+
+  auto strokeLineCap = StyleStrokeLinecap::Butt;
+  Float strokeWidth = 0;
+  RefPtr<Path> path;
+  const bool useDProperty = StaticPrefs::layout_css_d_property_enabled();
+
+  auto callback = [&](const ComputedStyle* s) {
+    const nsStyleSVG* styleSVG = s->StyleSVG();
+    // Note: the path that we return may be used for hit-testing, and SVG
+    // exposes hit-testing of strokes that are not actually painted. For that
+    // reason we do not check for eStyleSVGPaintType_None or check the stroke
+    // opacity here.
+    if (styleSVG->mStrokeLinecap != StyleStrokeLinecap::Butt) {
+      strokeLineCap = styleSVG->mStrokeLinecap;
+      strokeWidth = SVGContentUtils::GetStrokeWidth(this, s, nullptr);
+    }
+
+    if (!useDProperty) {
+      return;
+    }
+
+    const auto& d = s->StyleSVGReset()->mD;
+    if (d.IsPath()) {
+      path = SVGPathData::BuildPath(d.AsPath()._0.AsSpan(), aBuilder,
+                                    strokeLineCap, strokeWidth);
+    }
+  };
+
+  bool success = SVGGeometryProperty::DoForComputedStyle(this, callback);
+  if (success && useDProperty) {
+    return path.forget();
+  }
+
+  // Fallback to use the d attribute if it exists.
+  return mD.GetAnimValue().BuildPath(aBuilder, strokeLineCap, strokeWidth);
+}
+
+bool SVGPathElement::GetDistancesFromOriginToEndsOfVisibleSegments(
+    FallibleTArray<double>* aOutput) {
+  bool ret = false;
+  auto callback = [&ret, aOutput](const ComputedStyle* s) {
+    const auto& d = s->StyleSVGReset()->mD;
+    ret = d.IsNone() ||
+          SVGPathData::GetDistancesFromOriginToEndsOfVisibleSegments(
+              d.AsPath()._0.AsSpan(), aOutput);
+  };
+
+  if (StaticPrefs::layout_css_d_property_enabled() &&
+      SVGGeometryProperty::DoForComputedStyle(this, callback)) {
+    return ret;
+  }
+
+  return mD.GetAnimValue().GetDistancesFromOriginToEndsOfVisibleSegments(
+      aOutput);
+}
+
+/* static */
+bool SVGPathElement::IsDPropertyChangedViaCSS(const ComputedStyle& aNewStyle,
+                                              const ComputedStyle& aOldStyle) {
+  return aNewStyle.StyleSVGReset()->mD != aOldStyle.StyleSVGReset()->mD;
+}
+
+}  // namespace mozilla::dom