dom/html/HTMLPictureElement.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/HTMLPictureElement.h"
   8 #include "mozilla/dom/HTMLPictureElementBinding.h"
   9 #include "mozilla/dom/HTMLImageElement.h"
  10 #include "mozilla/dom/HTMLSourceElement.h"
  11
  12 // Expand NS_IMPL_NS_NEW_HTML_ELEMENT(Picture) to add pref check.
  13 nsGenericHTMLElement* NS_NewHTMLPictureElement(
  14     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
  15     mozilla::dom::FromParser aFromParser) {
  16   RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo);
  17   auto* nim = nodeInfo->NodeInfoManager();
  18   return new (nim) mozilla::dom::HTMLPictureElement(nodeInfo.forget());
  19 }
  20
  21 namespace mozilla::dom {
  22
  23 HTMLPictureElement::HTMLPictureElement(
  24     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  25     : nsGenericHTMLElement(std::move(aNodeInfo)) {}
  26
  27 HTMLPictureElement::~HTMLPictureElement() = default;
  28
  29 NS_IMPL_ELEMENT_CLONE(HTMLPictureElement)
  30
  31 void HTMLPictureElement::RemoveChildNode(nsIContent* aKid, bool aNotify) {
  32   MOZ_ASSERT(aKid);
  33
  34   if (auto* img = HTMLImageElement::FromNode(aKid)) {
  35     img->PictureSourceRemoved();
  36   } else if (auto* source = HTMLSourceElement::FromNode(aKid)) {
  37     // Find all img siblings after this <source> to notify them of its demise
  38     nsCOMPtr<nsIContent> nextSibling = source->GetNextSibling();
  39     if (nextSibling && nextSibling->GetParentNode() == this) {
  40       do {
  41         if (auto* img = HTMLImageElement::FromNode(nextSibling)) {
  42           img->PictureSourceRemoved(source);
  43         }
  44       } while ((nextSibling = nextSibling->GetNextSibling()));
  45     }
  46   }
  47
  48   nsGenericHTMLElement::RemoveChildNode(aKid, aNotify);
  49 }
  50
  51 void HTMLPictureElement::InsertChildBefore(nsIContent* aKid,
  52                                            nsIContent* aBeforeThis,
  53                                            bool aNotify, ErrorResult& aRv) {
  54   nsGenericHTMLElement::InsertChildBefore(aKid, aBeforeThis, aNotify, aRv);
  55   if (aRv.Failed() || !aKid) {
  56     return;
  57   }
  58
  59   if (auto* img = HTMLImageElement::FromNode(aKid)) {
  60     img->PictureSourceAdded();
  61   } else if (auto* source = HTMLSourceElement::FromNode(aKid)) {
  62     // Find all img siblings after this <source> to notify them of its insertion
  63     nsCOMPtr<nsIContent> nextSibling = source->GetNextSibling();
  64     if (nextSibling && nextSibling->GetParentNode() == this) {
  65       do {
  66         if (auto* img = HTMLImageElement::FromNode(nextSibling)) {
  67           img->PictureSourceAdded(source);
  68         }
  69       } while ((nextSibling = nextSibling->GetNextSibling()));
  70     }
  71   }
  72 }
  73
  74 JSObject* HTMLPictureElement::WrapNode(JSContext* aCx,
  75                                        JS::Handle<JSObject*> aGivenProto) {
  76   return HTMLPictureElement_Binding::Wrap(aCx, this, aGivenProto);
  77 }
  78
  79 }  // namespace mozilla::dom