зеркало из https://github.com/mozilla/gecko-dev.git
379 строки
11 KiB
C++
379 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/SVGFEImageElement.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/SVGFEImageElementBinding.h"
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#include "mozilla/dom/SVGFilterElement.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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#include "nsContentUtils.h"
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#include "nsLayoutUtils.h"
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#include "nsSVGUtils.h"
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#include "nsNetUtil.h"
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#include "imgIContainer.h"
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#include "gfx2DGlue.h"
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NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(FEImage)
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace dom {
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JSObject*
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SVGFEImageElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return SVGFEImageElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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nsSVGElement::StringInfo SVGFEImageElement::sStringInfo[3] =
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{
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{ &nsGkAtoms::result, kNameSpaceID_None, true },
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{ &nsGkAtoms::href, kNameSpaceID_None, true },
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{ &nsGkAtoms::href, kNameSpaceID_XLink, true }
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};
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//----------------------------------------------------------------------
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// nsISupports methods
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NS_IMPL_ISUPPORTS_INHERITED(SVGFEImageElement, SVGFEImageElementBase,
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imgINotificationObserver, nsIImageLoadingContent)
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//----------------------------------------------------------------------
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// Implementation
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SVGFEImageElement::SVGFEImageElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
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: SVGFEImageElementBase(aNodeInfo)
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{
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// We start out broken
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AddStatesSilently(NS_EVENT_STATE_BROKEN);
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}
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SVGFEImageElement::~SVGFEImageElement()
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{
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DestroyImageLoadingContent();
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}
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//----------------------------------------------------------------------
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nsresult
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SVGFEImageElement::LoadSVGImage(bool aForce, bool aNotify)
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{
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// resolve href attribute
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nsCOMPtr<nsIURI> baseURI = GetBaseURI();
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nsAutoString href;
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if (mStringAttributes[HREF].IsExplicitlySet()) {
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mStringAttributes[HREF].GetAnimValue(href, this);
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} else {
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mStringAttributes[XLINK_HREF].GetAnimValue(href, this);
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}
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href.Trim(" \t\n\r");
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if (baseURI && !href.IsEmpty())
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NS_MakeAbsoluteURI(href, href, baseURI);
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// Make sure we don't get in a recursive death-spiral
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nsIDocument* doc = OwnerDoc();
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nsCOMPtr<nsIURI> hrefAsURI;
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if (NS_SUCCEEDED(StringToURI(href, doc, getter_AddRefs(hrefAsURI)))) {
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bool isEqual;
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if (NS_SUCCEEDED(hrefAsURI->Equals(baseURI, &isEqual)) && isEqual) {
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// Image URI matches our URI exactly! Bail out.
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return NS_OK;
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}
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}
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// Mark channel as urgent-start before load image if the image load is
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// initaiated by a user interaction.
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mUseUrgentStartForChannel = EventStateManager::IsHandlingUserInput();
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return LoadImage(href, aForce, aNotify, eImageLoadType_Normal);
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}
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//----------------------------------------------------------------------
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// EventTarget methods:
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void
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SVGFEImageElement::AsyncEventRunning(AsyncEventDispatcher* aEvent)
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{
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nsImageLoadingContent::AsyncEventRunning(aEvent);
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}
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//----------------------------------------------------------------------
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// nsIContent methods:
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NS_IMETHODIMP_(bool)
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SVGFEImageElement::IsAttributeMapped(const nsAtom* name) const
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{
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static const MappedAttributeEntry* const map[] = {
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sGraphicsMap
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};
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return FindAttributeDependence(name, map) ||
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SVGFEImageElementBase::IsAttributeMapped(name);
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}
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nsresult
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SVGFEImageElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify)
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{
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if (aName == nsGkAtoms::href &&
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(aNamespaceID == kNameSpaceID_XLink ||
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aNamespaceID == kNameSpaceID_None)) {
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if (aValue) {
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LoadSVGImage(true, aNotify);
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} else {
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CancelImageRequests(aNotify);
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}
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}
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return SVGFEImageElementBase::AfterSetAttr(aNamespaceID, aName,
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aValue, aOldValue,
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aSubjectPrincipal,
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aNotify);
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}
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void
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SVGFEImageElement::MaybeLoadSVGImage()
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{
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if ((mStringAttributes[HREF].IsExplicitlySet() ||
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mStringAttributes[XLINK_HREF].IsExplicitlySet() ) &&
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(NS_FAILED(LoadSVGImage(false, true)) ||
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!LoadingEnabled())) {
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CancelImageRequests(true);
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}
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}
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nsresult
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SVGFEImageElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent)
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{
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nsresult rv = SVGFEImageElementBase::BindToTree(aDocument, aParent,
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aBindingParent);
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NS_ENSURE_SUCCESS(rv, rv);
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nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent);
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if (mStringAttributes[HREF].IsExplicitlySet() ||
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mStringAttributes[XLINK_HREF].IsExplicitlySet()) {
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// FIXME: Bug 660963 it would be nice if we could just have
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// ClearBrokenState update our state and do it fast...
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ClearBrokenState();
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RemoveStatesSilently(NS_EVENT_STATE_BROKEN);
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nsContentUtils::AddScriptRunner(
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NewRunnableMethod("dom::SVGFEImageElement::MaybeLoadSVGImage",
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this,
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&SVGFEImageElement::MaybeLoadSVGImage));
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}
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return rv;
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}
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void
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SVGFEImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
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{
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nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
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SVGFEImageElementBase::UnbindFromTree(aDeep, aNullParent);
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}
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EventStates
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SVGFEImageElement::IntrinsicState() const
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{
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return SVGFEImageElementBase::IntrinsicState() |
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nsImageLoadingContent::ImageState();
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}
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//----------------------------------------------------------------------
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// nsINode methods
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NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEImageElement)
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already_AddRefed<SVGAnimatedString>
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SVGFEImageElement::Href()
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{
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return mStringAttributes[HREF].IsExplicitlySet()
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? mStringAttributes[HREF].ToDOMAnimatedString(this)
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: mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
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}
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//----------------------------------------------------------------------
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// nsIDOMSVGFEImageElement methods
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FilterPrimitiveDescription
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SVGFEImageElement::GetPrimitiveDescription(nsSVGFilterInstance* aInstance,
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const IntRect& aFilterSubregion,
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const nsTArray<bool>& aInputsAreTainted,
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nsTArray<RefPtr<SourceSurface>>& aInputImages)
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{
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nsIFrame* frame = GetPrimaryFrame();
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if (!frame) {
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return FilterPrimitiveDescription(PrimitiveType::Empty);
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}
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nsCOMPtr<imgIRequest> currentRequest;
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GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(currentRequest));
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nsCOMPtr<imgIContainer> imageContainer;
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if (currentRequest) {
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currentRequest->GetImage(getter_AddRefs(imageContainer));
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}
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RefPtr<SourceSurface> image;
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if (imageContainer) {
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uint32_t flags = imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY;
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image = imageContainer->GetFrame(imgIContainer::FRAME_CURRENT, flags);
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}
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if (!image) {
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return FilterPrimitiveDescription(PrimitiveType::Empty);
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}
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IntSize nativeSize;
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imageContainer->GetWidth(&nativeSize.width);
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imageContainer->GetHeight(&nativeSize.height);
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Matrix viewBoxTM =
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SVGContentUtils::GetViewBoxTransform(aFilterSubregion.width, aFilterSubregion.height,
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0, 0, nativeSize.width, nativeSize.height,
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mPreserveAspectRatio);
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Matrix TM = viewBoxTM;
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TM.PostTranslate(aFilterSubregion.x, aFilterSubregion.y);
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SamplingFilter samplingFilter = nsLayoutUtils::GetSamplingFilterForFrame(frame);
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FilterPrimitiveDescription descr(PrimitiveType::Image);
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descr.Attributes().Set(eImageFilter, (uint32_t)samplingFilter);
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descr.Attributes().Set(eImageTransform, TM);
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// Append the image to aInputImages and store its index in the description.
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size_t imageIndex = aInputImages.Length();
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aInputImages.AppendElement(image);
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descr.Attributes().Set(eImageInputIndex, (uint32_t)imageIndex);
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return descr;
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}
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bool
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SVGFEImageElement::AttributeAffectsRendering(int32_t aNameSpaceID,
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nsAtom* aAttribute) const
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{
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// nsGkAtoms::href is deliberately omitted as the frame has special
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// handling to load the image
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return SVGFEImageElementBase::AttributeAffectsRendering(aNameSpaceID, aAttribute) ||
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(aNameSpaceID == kNameSpaceID_None &&
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aAttribute == nsGkAtoms::preserveAspectRatio);
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}
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bool
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SVGFEImageElement::OutputIsTainted(const nsTArray<bool>& aInputsAreTainted,
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nsIPrincipal* aReferencePrincipal)
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{
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nsresult rv;
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nsCOMPtr<imgIRequest> currentRequest;
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GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(currentRequest));
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if (!currentRequest) {
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return false;
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}
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uint32_t status;
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currentRequest->GetImageStatus(&status);
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if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
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// The load has not completed yet.
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return false;
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}
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nsCOMPtr<nsIPrincipal> principal;
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rv = currentRequest->GetImagePrincipal(getter_AddRefs(principal));
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if (NS_FAILED(rv) || !principal) {
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return true;
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}
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int32_t corsmode;
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if (NS_SUCCEEDED(currentRequest->GetCORSMode(&corsmode)) &&
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corsmode != imgIRequest::CORS_NONE) {
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// If CORS was used to load the image, the page is allowed to read from it.
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return false;
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}
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if (aReferencePrincipal->Subsumes(principal)) {
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// The page is allowed to read from the image.
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return false;
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}
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return true;
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}
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//----------------------------------------------------------------------
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// nsSVGElement methods
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already_AddRefed<DOMSVGAnimatedPreserveAspectRatio>
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SVGFEImageElement::PreserveAspectRatio()
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{
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return mPreserveAspectRatio.ToDOMAnimatedPreserveAspectRatio(this);
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}
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SVGAnimatedPreserveAspectRatio *
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SVGFEImageElement::GetPreserveAspectRatio()
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{
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return &mPreserveAspectRatio;
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}
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nsSVGElement::StringAttributesInfo
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SVGFEImageElement::GetStringInfo()
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{
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return StringAttributesInfo(mStringAttributes, sStringInfo,
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ArrayLength(sStringInfo));
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}
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//----------------------------------------------------------------------
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// imgINotificationObserver methods
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NS_IMETHODIMP
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SVGFEImageElement::Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData)
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{
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nsresult rv = nsImageLoadingContent::Notify(aRequest, aType, aData);
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if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
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// Request a decode
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nsCOMPtr<imgIContainer> container;
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aRequest->GetImage(getter_AddRefs(container));
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MOZ_ASSERT(container, "who sent the notification then?");
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container->StartDecoding(imgIContainer::FLAG_NONE);
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}
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if (aType == imgINotificationObserver::LOAD_COMPLETE ||
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aType == imgINotificationObserver::FRAME_UPDATE ||
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aType == imgINotificationObserver::SIZE_AVAILABLE) {
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Invalidate();
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}
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return rv;
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}
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//----------------------------------------------------------------------
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// helper methods
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void
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SVGFEImageElement::Invalidate()
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{
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if (GetParent() && GetParent()->IsSVGElement(nsGkAtoms::filter)) {
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static_cast<SVGFilterElement*>(GetParent())->Invalidate();
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}
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}
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} // namespace dom
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} // namespace mozilla
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