/* -*- 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/EventStateManager.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 "mozilla/dom/SVGLengthBinding.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 SVGImageElement_Binding::Wrap(aCx, this, aGivenProto);

}

nsSVGElement::LengthInfo SVGImageElement::sLengthInfo[4] =

{

  { &nsGkAtoms::x, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },

  { &nsGkAtoms::y, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },

  { &nsGkAtoms::width, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::X },

  { &nsGkAtoms::height, 0, SVGLength_Binding::SVG_LENGTHTYPE_NUMBER, SVGContentUtils::Y },

};

nsSVGElement::StringInfo SVGImageElement::sStringInfo[2] =

{

  { &nsGkAtoms::href, kNameSpaceID_None, true },

  { &nsGkAtoms::href, kNameSpaceID_XLink, true }

};

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

// nsISupports methods

NS_IMPL_ISUPPORTS_INHERITED(SVGImageElement, SVGImageElementBase,

                            imgINotificationObserver,

                            nsIImageLoadingContent)

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

// Implementation

SVGImageElement::SVGImageElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)

  : SVGImageElementBase(std::move(aNodeInfo))

{

  // We start out broken

  AddStatesSilently(NS_EVENT_STATE_BROKEN);

}

SVGImageElement::~SVGImageElement()

{

  DestroyImageLoadingContent();

}

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

// nsINode 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].IsExplicitlySet()

         ? mStringAttributes[HREF].ToDOMAnimatedString(this)

         : mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);

}

void

SVGImageElement::GetDecoding(nsAString& aValue)

{

  GetEnumAttr(nsGkAtoms::decoding, kDecodingTableDefault->tag, aValue);

}

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

nsresult

SVGImageElement::LoadSVGImage(bool aForce, bool aNotify)

{

  // resolve href attribute

  nsCOMPtr<nsIURI> baseURI = GetBaseURI();

  nsAutoString href;

  if (mStringAttributes[HREF].IsExplicitlySet()) {

    mStringAttributes[HREF].GetAnimValue(href, this);

  } else {

    mStringAttributes[XLINK_HREF].GetAnimValue(href, this);

  }

  href.Trim(" \t\n\r");

  if (baseURI && !href.IsEmpty())

    NS_MakeAbsoluteURI(href, href, baseURI);

  // Mark channel as urgent-start before load image if the image load is

  // initaiated by a user interaction.

  mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();

  return LoadImage(href, aForce, aNotify, eImageLoadType_Normal);

}

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

// EventTarget methods:

void

SVGImageElement::AsyncEventRunning(AsyncEventDispatcher* aEvent)

{

  nsImageLoadingContent::AsyncEventRunning(aEvent);

}

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

// nsIContent methods:

bool

SVGImageElement::ParseAttribute(int32_t aNamespaceID,

                                 nsAtom* aAttribute,

                                 const nsAString& aValue,

                                 nsIPrincipal* aMaybeScriptedPrincipal,

                                 nsAttrValue& aResult)

{

  if (aNamespaceID == kNameSpaceID_None) {

    if (aAttribute == nsGkAtoms::decoding) {

      return aResult.ParseEnumValue(aValue, kDecodingTable, false,

                                    kDecodingTableDefault);

    }

  }

  return SVGImageElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,

                                             aMaybeScriptedPrincipal, aResult);

}

nsresult

SVGImageElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,

                              const nsAttrValue* aValue,

                              const nsAttrValue* aOldValue,

                              nsIPrincipal* aSubjectPrincipal,

                              bool aNotify)

{

  if (aName == nsGkAtoms::href &&

      (aNamespaceID == kNameSpaceID_None ||

       aNamespaceID == kNameSpaceID_XLink)) {

    if (aValue) {

      LoadSVGImage(true, aNotify);

    } else {

      CancelImageRequests(aNotify);

    }

  } else if (aName == nsGkAtoms::decoding &&

             aNamespaceID == kNameSpaceID_None) {

    // Request sync or async image decoding.

    SetSyncDecodingHint(aValue &&

                        static_cast<ImageDecodingType>(aValue->GetEnumValue())

                          == ImageDecodingType::Sync);

  }

  return SVGImageElementBase::AfterSetAttr(aNamespaceID, aName,

                                           aValue, aOldValue,

                                           aSubjectPrincipal, aNotify);

}

void

SVGImageElement::MaybeLoadSVGImage()

{

  if ((mStringAttributes[HREF].IsExplicitlySet() ||

       mStringAttributes[XLINK_HREF].IsExplicitlySet()) &&

      (NS_FAILED(LoadSVGImage(false, true)) ||

       !LoadingEnabled())) {

    CancelImageRequests(true);

  }

}

nsresult

SVGImageElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,

                            nsIContent* aBindingParent)

{

  nsresult rv = SVGImageElementBase::BindToTree(aDocument, aParent,

                                                aBindingParent);

  NS_ENSURE_SUCCESS(rv, rv);

  nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent);

  if (mStringAttributes[HREF].IsExplicitlySet() ||

      mStringAttributes[XLINK_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(

      NewRunnableMethod("dom::SVGImageElement::MaybeLoadSVGImage",

                        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 nsAtom* name) const

{

  static const MappedAttributeEntry* const map[] = {

    sViewportsMap,

  };

  return FindAttributeDependence(name, map) ||

    SVGImageElementBase::IsAttributeMapped(name);

}

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

// SVGGeometryElement 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