import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/svg/SVGRectElement.cpp

@@ -0,0 +1,238 @@
+/* -*- 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/SVGRectElement.h"
+#include "nsGkAtoms.h"
+#include "mozilla/dom/SVGRectElementBinding.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Matrix.h"
+#include "mozilla/gfx/Rect.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include <algorithm>
+
+NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Rect)
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace dom {
+
+class SVGAnimatedLength;
+
+JSObject*
+SVGRectElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return SVGRectElementBinding::Wrap(aCx, this, aGivenProto);
+}
+
+nsSVGElement::LengthInfo SVGRectElement::sLengthInfo[6] =
+{
+  { &nsGkAtoms::x, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
+  { &nsGkAtoms::y, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
+  { &nsGkAtoms::width, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
+  { &nsGkAtoms::height, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },
+  { &nsGkAtoms::rx, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },
+  { &nsGkAtoms::ry, 0, nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y }
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGRectElement::SVGRectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
+  : SVGRectElementBase(aNodeInfo)
+{
+}
+
+//----------------------------------------------------------------------
+// nsIDOMNode methods
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGRectElement)
+
+//----------------------------------------------------------------------
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::X()
+{
+  return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::Y()
+{
+  return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::Width()
+{
+  return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::Height()
+{
+  return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::Rx()
+{
+  return mLengthAttributes[ATTR_RX].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<SVGAnimatedLength>
+SVGRectElement::Ry()
+{
+  return mLengthAttributes[ATTR_RY].ToDOMAnimatedLength(this);
+}
+
+//----------------------------------------------------------------------
+// nsSVGElement methods
+
+/* virtual */ bool
+SVGRectElement::HasValidDimensions() const
+{
+  return mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() &&
+         mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0 &&
+         mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() &&
+         mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0;
+}
+
+nsSVGElement::LengthAttributesInfo
+SVGRectElement::GetLengthInfo()
+{
+  return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
+                              ArrayLength(sLengthInfo));
+}
+
+//----------------------------------------------------------------------
+// nsSVGPathGeometryElement methods
+
+bool
+SVGRectElement::GetGeometryBounds(Rect* aBounds,
+                                  const StrokeOptions& aStrokeOptions,
+                                  const Matrix& aToBoundsSpace,
+                                  const Matrix* aToNonScalingStrokeSpace)
+{
+  Rect rect;
+  Float rx, ry;
+  GetAnimatedLengthValues(&rect.x, &rect.y, &rect.width,
+                          &rect.height, &rx, &ry, nullptr);
+
+  if (rect.IsEmpty()) {
+    // Rendering of the element disabled
+    rect.SetEmpty(); // Make sure width/height are zero and not negative
+    // We still want the x/y position from 'rect'
+    *aBounds = aToBoundsSpace.TransformBounds(rect);
+    return true;
+  }
+
+  if (!aToBoundsSpace.IsRectilinear()) {
+    // We can't ignore the radii in this case if we want tight bounds
+    rx = std::max(rx, 0.0f);
+    ry = std::max(ry, 0.0f);
+
+    if (rx != 0 || ry != 0) {
+      return false;
+    }
+  }
+
+  if (aStrokeOptions.mLineWidth > 0.f) {
+    if (aToNonScalingStrokeSpace) {
+      if (aToNonScalingStrokeSpace->IsRectilinear()) {
+        MOZ_ASSERT(!aToNonScalingStrokeSpace->IsSingular());
+        rect = aToNonScalingStrokeSpace->TransformBounds(rect);
+        // Note that, in principle, an author could cause the corners of the
+        // rect to be beveled by specifying stroke-linejoin or setting
+        // stroke-miterlimit to be less than sqrt(2). In that very unlikely
+        // event the bounds that we calculate here may be too big if
+        // aToBoundsSpace is non-rectilinear. This is likely to be so rare it's
+        // not worth handling though.
+        rect.Inflate(aStrokeOptions.mLineWidth / 2.f);
+        Matrix nonScalingToBounds =
+          aToNonScalingStrokeSpace->Inverse() * aToBoundsSpace;
+        *aBounds = nonScalingToBounds.TransformBounds(rect);
+        return true;
+      }
+      return false;
+    }
+    // The "beveled" comment above applies here too
+    rect.Inflate(aStrokeOptions.mLineWidth / 2.f);
+  }
+
+  *aBounds = aToBoundsSpace.TransformBounds(rect);
+  return true;
+}
+
+void
+SVGRectElement::GetAsSimplePath(SimplePath* aSimplePath)
+{
+  float x, y, width, height, rx, ry;
+  GetAnimatedLengthValues(&x, &y, &width, &height, &rx, &ry, nullptr);
+
+  if (width <= 0 || height <= 0) {
+    aSimplePath->Reset();
+    return;
+  }
+
+  rx = std::max(rx, 0.0f);
+  ry = std::max(ry, 0.0f);
+
+  if (rx != 0 || ry != 0) {
+    aSimplePath->Reset();
+    return;
+  }
+
+  aSimplePath->SetRect(x, y, width, height);
+}
+
+already_AddRefed<Path>
+SVGRectElement::BuildPath(PathBuilder* aBuilder)
+{
+  float x, y, width, height, rx, ry;
+  GetAnimatedLengthValues(&x, &y, &width, &height, &rx, &ry, nullptr);
+
+  if (width <= 0 || height <= 0) {
+    return nullptr;
+  }
+
+  rx = std::max(rx, 0.0f);
+  ry = std::max(ry, 0.0f);
+
+  if (rx == 0 && ry == 0) {
+    // Optimization for the no rounded corners case.
+    Rect r(x, y, width, height);
+    aBuilder->MoveTo(r.TopLeft());
+    aBuilder->LineTo(r.TopRight());
+    aBuilder->LineTo(r.BottomRight());
+    aBuilder->LineTo(r.BottomLeft());
+    aBuilder->Close();
+  } else {
+    // If either the 'rx' or the 'ry' attribute isn't set, then we have to
+    // set it to the value of the other:
+    bool hasRx = mLengthAttributes[ATTR_RX].IsExplicitlySet();
+    bool hasRy = mLengthAttributes[ATTR_RY].IsExplicitlySet();
+    MOZ_ASSERT(hasRx || hasRy);
+
+    if (hasRx && !hasRy) {
+      ry = rx;
+    } else if (hasRy && !hasRx) {
+      rx = ry;
+    }
+
+    // Clamp rx and ry to half the rect's width and height respectively:
+    rx = std::min(rx, width / 2);
+    ry = std::min(ry, height / 2);
+
+    RectCornerRadii radii(rx, ry);
+    AppendRoundedRectToPath(aBuilder, Rect(x, y, width, height), radii);
+  }
+
+  return aBuilder->Finish();
+}
+
+} // namespace dom
+} // namespace mozilla