Mypal/dom/svg/SVGForeignObjectElement.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/ArrayUtils.h"

#include "nsCOMPtr.h"
#include "mozilla/dom/SVGDocument.h"
#include "mozilla/dom/SVGForeignObjectElement.h"
#include "mozilla/dom/SVGForeignObjectElementBinding.h"

NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(ForeignObject)

namespace mozilla {
namespace dom {

JSObject*
SVGForeignObjectElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
  return SVGForeignObjectElementBinding::Wrap(aCx, this, aGivenProto);
}

nsSVGElement::LengthInfo SVGForeignObjectElement::sLengthInfo[4] =
{
  { &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 },
};

//----------------------------------------------------------------------
// Implementation

SVGForeignObjectElement::SVGForeignObjectElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
  : SVGGraphicsElement(aNodeInfo)
{
}

//----------------------------------------------------------------------
// nsIDOMNode methods

NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGForeignObjectElement)

//----------------------------------------------------------------------

already_AddRefed<SVGAnimatedLength>
SVGForeignObjectElement::X()
{
  return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
}

already_AddRefed<SVGAnimatedLength>
SVGForeignObjectElement::Y()
{
  return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
}

already_AddRefed<SVGAnimatedLength>
SVGForeignObjectElement::Width()
{
  return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
}

already_AddRefed<SVGAnimatedLength>
SVGForeignObjectElement::Height()
{
  return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
}

//----------------------------------------------------------------------
// nsSVGElement methods

/* virtual */ gfxMatrix
SVGForeignObjectElement::PrependLocalTransformsTo(
  const gfxMatrix &aMatrix, SVGTransformTypes aWhich) const
{
  // 'transform' attribute:
  gfxMatrix fromUserSpace =
    SVGGraphicsElement::PrependLocalTransformsTo(aMatrix, aWhich);
  if (aWhich == eUserSpaceToParent) {
    return fromUserSpace;
  }
  // our 'x' and 'y' attributes:
  float x, y;
  const_cast<SVGForeignObjectElement*>(this)->
    GetAnimatedLengthValues(&x, &y, nullptr);
  gfxMatrix toUserSpace = gfxMatrix::Translation(x, y);
  if (aWhich == eChildToUserSpace) {
    return toUserSpace * aMatrix;
  }
  MOZ_ASSERT(aWhich == eAllTransforms, "Unknown TransformTypes");
  return toUserSpace * fromUserSpace;
}

/* virtual */ bool
SVGForeignObjectElement::HasValidDimensions() const
{
  return mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() &&
         mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0 &&
         mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() &&
         mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0;
}

//----------------------------------------------------------------------
// nsIContent methods

nsresult
SVGForeignObjectElement::BindToTree(nsIDocument* aDocument,
                                    nsIContent* aParent,
                                    nsIContent* aBindingParent,
                                    bool aCompileEventHandlers)
{
  nsresult rv = SVGGraphicsElement::BindToTree(aDocument, aParent,
                                               aBindingParent,
                                               aCompileEventHandlers);
  NS_ENSURE_SUCCESS(rv, rv);

  nsIDocument* doc = GetComposedDoc();
  if (doc && doc->IsSVGDocument()) {
    // We assume that we're going to have HTML content, so we ensure that the
    // UA style sheets that nsDocumentViewer::CreateStyleSet skipped when
    // it saw the document was an SVG document are loaded.
    //
    // We setup these style sheets during binding, not element construction,
    // because elements can be moved from the document that creates them to
    // another document.
    doc->AsSVGDocument()->EnsureNonSVGUserAgentStyleSheetsLoaded();
  }

  return rv;
}

NS_IMETHODIMP_(bool)
SVGForeignObjectElement::IsAttributeMapped(const nsIAtom* name) const
{
  static const MappedAttributeEntry* const map[] = {
    sFEFloodMap,
    sFiltersMap,
    sFontSpecificationMap,
    sGradientStopMap,
    sLightingEffectsMap,
    sMarkersMap,
    sTextContentElementsMap,
    sViewportsMap
  };

  return FindAttributeDependence(name, map) ||
    SVGGraphicsElement::IsAttributeMapped(name);
}

//----------------------------------------------------------------------
// nsSVGElement methods

nsSVGElement::LengthAttributesInfo
SVGForeignObjectElement::GetLengthInfo()
{
  return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
                              ArrayLength(sLengthInfo));
}

} // namespace dom
} // namespace mozilla