gecko-dev/dom/svg/SVGImageElement.cpp

308 lines
8.7 KiB
C++

/* -*- 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/ArrayUtils.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/SVGImageElement.h"
#include "mozilla/gfx/2D.h"
#include "nsCOMPtr.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "imgINotificationObserver.h"
#include "mozilla/dom/SVGImageElementBinding.h"
#include "nsContentUtils.h"
NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Image)
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
JSObject*
SVGImageElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGImageElementBinding::Wrap(aCx, this, aGivenProto);
}
nsSVGElement::LengthInfo SVGImageElement::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 },
};
nsSVGElement::StringInfo SVGImageElement::sStringInfo[1] =
{
{ &nsGkAtoms::href, kNameSpaceID_XLink, true }
};
//----------------------------------------------------------------------
// nsISupports methods
NS_IMPL_ISUPPORTS_INHERITED(SVGImageElement, SVGImageElementBase,
nsIDOMNode, nsIDOMElement,
nsIDOMSVGElement,
imgINotificationObserver,
nsIImageLoadingContent, imgIOnloadBlocker)
//----------------------------------------------------------------------
// Implementation
SVGImageElement::SVGImageElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGImageElementBase(aNodeInfo)
{
// We start out broken
AddStatesSilently(NS_EVENT_STATE_BROKEN);
}
SVGImageElement::~SVGImageElement()
{
DestroyImageLoadingContent();
}
//----------------------------------------------------------------------
// nsIDOMNode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGImageElement)
//----------------------------------------------------------------------
already_AddRefed<SVGAnimatedLength>
SVGImageElement::X()
{
return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGImageElement::Y()
{
return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGImageElement::Width()
{
return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
}
already_AddRefed<SVGAnimatedLength>
SVGImageElement::Height()
{
return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedPreserveAspectRatio>
SVGImageElement::PreserveAspectRatio()
{
return mPreserveAspectRatio.ToDOMAnimatedPreserveAspectRatio(this);
}
already_AddRefed<SVGAnimatedString>
SVGImageElement::Href()
{
return mStringAttributes[HREF].ToDOMAnimatedString(this);
}
//----------------------------------------------------------------------
nsresult
SVGImageElement::LoadSVGImage(bool aForce, bool aNotify)
{
// resolve href attribute
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
nsAutoString href;
mStringAttributes[HREF].GetAnimValue(href, this);
href.Trim(" \t\n\r");
if (baseURI && !href.IsEmpty())
NS_MakeAbsoluteURI(href, href, baseURI);
return LoadImage(href, aForce, aNotify, eImageLoadType_Normal);
}
//----------------------------------------------------------------------
// nsIContent methods:
nsresult
SVGImageElement::AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValue* aValue, bool aNotify)
{
if (aNamespaceID == kNameSpaceID_XLink && aName == nsGkAtoms::href) {
// If there isn't a frame we still need to load the image in case
// the frame is created later e.g. by attaching to a document.
// If there is a frame then it should deal with loading as the image
// url may be animated
if (!GetPrimaryFrame()) {
if (aValue) {
LoadSVGImage(true, aNotify);
} else {
CancelImageRequests(aNotify);
}
}
}
return SVGImageElementBase::AfterSetAttr(aNamespaceID, aName,
aValue, aNotify);
}
void
SVGImageElement::MaybeLoadSVGImage()
{
if (mStringAttributes[HREF].IsExplicitlySet() &&
(NS_FAILED(LoadSVGImage(false, true)) ||
!LoadingEnabled())) {
CancelImageRequests(true);
}
}
nsresult
SVGImageElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
nsresult rv = SVGImageElementBase::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent,
aCompileEventHandlers);
if (mStringAttributes[HREF].IsExplicitlySet()) {
// FIXME: Bug 660963 it would be nice if we could just have
// ClearBrokenState update our state and do it fast...
ClearBrokenState();
RemoveStatesSilently(NS_EVENT_STATE_BROKEN);
nsContentUtils::AddScriptRunner(
NS_NewRunnableMethod(this, &SVGImageElement::MaybeLoadSVGImage));
}
return rv;
}
void
SVGImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
SVGImageElementBase::UnbindFromTree(aDeep, aNullParent);
}
EventStates
SVGImageElement::IntrinsicState() const
{
return SVGImageElementBase::IntrinsicState() |
nsImageLoadingContent::ImageState();
}
NS_IMETHODIMP_(bool)
SVGImageElement::IsAttributeMapped(const nsIAtom* name) const
{
static const MappedAttributeEntry* const map[] = {
sViewportsMap,
};
return FindAttributeDependence(name, map) ||
SVGImageElementBase::IsAttributeMapped(name);
}
//----------------------------------------------------------------------
// nsSVGPathGeometryElement methods
/* For the purposes of the update/invalidation logic pretend to
be a rectangle. */
bool
SVGImageElement::GetGeometryBounds(Rect* aBounds,
const StrokeOptions& aStrokeOptions,
const Matrix& aToBoundsSpace,
const Matrix* aToNonScalingStrokeSpace)
{
Rect rect;
GetAnimatedLengthValues(&rect.x, &rect.y, &rect.width,
&rect.height, nullptr);
if (rect.IsEmpty()) {
// Rendering of the element disabled
rect.SetEmpty(); // Make sure width/height are zero and not negative
}
*aBounds = aToBoundsSpace.TransformBounds(rect);
return true;
}
already_AddRefed<Path>
SVGImageElement::BuildPath(PathBuilder* aBuilder)
{
// We get called in order to get bounds for this element, and for
// hit-testing against it. For that we just pretend to be a rectangle.
float x, y, width, height;
GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
if (width <= 0 || height <= 0) {
return nullptr;
}
Rect r(x, y, width, height);
aBuilder->MoveTo(r.TopLeft());
aBuilder->LineTo(r.TopRight());
aBuilder->LineTo(r.BottomRight());
aBuilder->LineTo(r.BottomLeft());
aBuilder->Close();
return aBuilder->Finish();
}
//----------------------------------------------------------------------
// nsSVGElement methods
/* virtual */ bool
SVGImageElement::HasValidDimensions() const
{
return mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() &&
mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0 &&
mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() &&
mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0;
}
nsSVGElement::LengthAttributesInfo
SVGImageElement::GetLengthInfo()
{
return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
ArrayLength(sLengthInfo));
}
SVGAnimatedPreserveAspectRatio *
SVGImageElement::GetPreserveAspectRatio()
{
return &mPreserveAspectRatio;
}
nsSVGElement::StringAttributesInfo
SVGImageElement::GetStringInfo()
{
return StringAttributesInfo(mStringAttributes, sStringInfo,
ArrayLength(sStringInfo));
}
nsresult
SVGImageElement::CopyInnerTo(Element* aDest)
{
if (aDest->OwnerDoc()->IsStaticDocument()) {
CreateStaticImageClone(static_cast<SVGImageElement*>(aDest));
}
return SVGImageElementBase::CopyInnerTo(aDest);
}
} // namespace dom
} // namespace mozilla