import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/base/AnonymousContent.cpp

@@ -0,0 +1,212 @@
+/* -*- 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/dom/Element.h"
+#include "mozilla/dom/AnonymousContentBinding.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIDocument.h"
+#include "nsIDOMHTMLCollection.h"
+#include "nsIFrame.h"
+#include "nsStyledElement.h"
+#include "HTMLCanvasElement.h"
+
+namespace mozilla {
+namespace 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(Element* aContentNode) :
+  mContentNode(aContentNode)
+{}
+
+AnonymousContent::~AnonymousContent()
+{
+}
+
+Element*
+AnonymousContent::GetContentNode()
+{
+  return mContentNode;
+}
+
+void
+AnonymousContent::SetContentNode(Element* aContentNode)
+{
+  mContentNode = aContentNode;
+}
+
+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,
+                                         ErrorResult& aRv)
+{
+  Element* element = GetElementById(aElementId);
+  if (!element) {
+    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
+    return;
+  }
+
+  element->SetAttribute(aName, aValue, 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.
+  nsCOMPtr<nsIAtom> elementId = NS_Atomize(aElementId);
+  for (nsIContent* node = mContentNode; node;
+       node = node->GetNextNode(mContentNode)) {
+    if (!node->IsElement()) {
+      continue;
+    }
+    nsIAtom* 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 AnonymousContentBinding::Wrap(aCx, this, aGivenProto, aReflector);
+}
+
+} // namespace dom
+} // namespace mozilla