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Diffstat (limited to '')
| -rw-r--r-- | dom/base/AnonymousContent.cpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/dom/base/AnonymousContent.cpp b/dom/base/AnonymousContent.cpp new file mode 100644 index 0000000000..eadbba1026 --- /dev/null +++ b/dom/base/AnonymousContent.cpp @@ -0,0 +1,221 @@ +/* -*- 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 "AnonymousContent.h" +#include "mozilla/PresShell.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/AnonymousContentBinding.h" +#include "nsComputedDOMStyle.h" +#include "nsCycleCollectionParticipant.h" +#include "nsIFrame.h" +#include "nsStyledElement.h" +#include "HTMLCanvasElement.h" + +namespace mozilla::dom { + +// Ref counting and cycle collection +NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AnonymousContent, AddRef) +NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AnonymousContent, Release) +NS_IMPL_CYCLE_COLLECTION(AnonymousContent, mContentNode) + +AnonymousContent::AnonymousContent(already_AddRefed<Element> aContentNode) + : mContentNode(aContentNode) { + MOZ_ASSERT(mContentNode); +} + +AnonymousContent::~AnonymousContent() = default; + +void AnonymousContent::SetTextContentForElement(const nsAString& aElementId, + const nsAString& aText, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + element->SetTextContent(aText, aRv); +} + +void AnonymousContent::GetTextContentForElement(const nsAString& aElementId, + DOMString& aText, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + element->GetTextContent(aText, aRv); +} + +void AnonymousContent::SetAttributeForElement(const nsAString& aElementId, + const nsAString& aName, + const nsAString& aValue, + nsIPrincipal* aSubjectPrincipal, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + element->SetAttribute(aName, aValue, aSubjectPrincipal, aRv); +} + +void AnonymousContent::GetAttributeForElement(const nsAString& aElementId, + const nsAString& aName, + DOMString& aValue, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + element->GetAttribute(aName, aValue); +} + +void AnonymousContent::RemoveAttributeForElement(const nsAString& aElementId, + const nsAString& aName, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + element->RemoveAttribute(aName, aRv); +} + +already_AddRefed<nsISupports> AnonymousContent::GetCanvasContext( + const nsAString& aElementId, const nsAString& aContextId, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return nullptr; + } + + if (!element->IsHTMLElement(nsGkAtoms::canvas)) { + return nullptr; + } + + nsCOMPtr<nsISupports> context; + + HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(element); + canvas->GetContext(aContextId, getter_AddRefs(context)); + + return context.forget(); +} + +already_AddRefed<Animation> AnonymousContent::SetAnimationForElement( + JSContext* aContext, const nsAString& aElementId, + JS::Handle<JSObject*> aKeyframes, + const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return nullptr; + } + + return element->Animate(aContext, aKeyframes, aOptions, aRv); +} + +void AnonymousContent::SetCutoutRectsForElement( + const nsAString& aElementId, const Sequence<OwningNonNull<DOMRect>>& aRects, + ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + nsRegion cutOutRegion; + for (const auto& r : aRects) { + CSSRect rect(r->X(), r->Y(), r->Width(), r->Height()); + cutOutRegion.OrWith(CSSRect::ToAppUnits(rect)); + } + + element->SetProperty(nsGkAtoms::cutoutregion, new nsRegion(cutOutRegion), + nsINode::DeleteProperty<nsRegion>); + + nsIFrame* frame = element->GetPrimaryFrame(); + if (frame) { + frame->SchedulePaint(); + } +} + +Element* AnonymousContent::GetElementById(const nsAString& aElementId) { + // This can be made faster in the future if needed. + RefPtr<nsAtom> elementId = NS_Atomize(aElementId); + for (nsIContent* node = mContentNode; node; + node = node->GetNextNode(mContentNode)) { + if (!node->IsElement()) { + continue; + } + nsAtom* id = node->AsElement()->GetID(); + if (id && id == elementId) { + return node->AsElement(); + } + } + return nullptr; +} + +bool AnonymousContent::WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto, + JS::MutableHandle<JSObject*> aReflector) { + return AnonymousContent_Binding::Wrap(aCx, this, aGivenProto, aReflector); +} + +void AnonymousContent::GetComputedStylePropertyValue( + const nsAString& aElementId, const nsACString& aPropertyName, + nsACString& aResult, ErrorResult& aRv) { + Element* element = GetElementById(aElementId); + if (!element) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + if (!element->OwnerDoc()->GetPresShell()) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + RefPtr<nsComputedDOMStyle> cs = new nsComputedDOMStyle( + element, u""_ns, element->OwnerDoc(), nsComputedDOMStyle::eAll); + aRv = cs->GetPropertyValue(aPropertyName, aResult); +} + +void AnonymousContent::GetTargetIdForEvent(Event& aEvent, DOMString& aResult) { + nsCOMPtr<Element> el = do_QueryInterface(aEvent.GetOriginalTarget()); + if (el && el->IsInNativeAnonymousSubtree() && mContentNode->Contains(el)) { + aResult.SetKnownLiveAtom(el->GetID(), DOMString::eTreatNullAsNull); + return; + } + + aResult.SetNull(); +} + +void AnonymousContent::SetStyle(const nsACString& aProperty, + const nsACString& aValue, ErrorResult& aRv) { + if (!mContentNode->IsHTMLElement()) { + aRv.Throw(NS_ERROR_NOT_AVAILABLE); + return; + } + + nsGenericHTMLElement* element = nsGenericHTMLElement::FromNode(mContentNode); + nsCOMPtr<nsICSSDeclaration> declaration = element->Style(); + declaration->SetProperty(aProperty, aValue, ""_ns, IgnoreErrors()); +} + +} // namespace mozilla::dom |