dom/html/HTMLTitleElement.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/HTMLTitleElement.h"
   8
   9 #include "mozilla/dom/HTMLTitleElementBinding.h"
  10 #include "mozilla/ErrorResult.h"
  11 #include "nsStyleConsts.h"
  12 #include "mozilla/dom/Document.h"
  13 #include "nsContentUtils.h"
  14
  15 NS_IMPL_NS_NEW_HTML_ELEMENT(Title)
  16
  17 namespace mozilla::dom {
  18
  19 HTMLTitleElement::HTMLTitleElement(
  20     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  21     : nsGenericHTMLElement(std::move(aNodeInfo)) {
  22   AddMutationObserver(this);
  23 }
  24
  25 HTMLTitleElement::~HTMLTitleElement() = default;
  26
  27 NS_IMPL_ISUPPORTS_INHERITED(HTMLTitleElement, nsGenericHTMLElement,
  28                             nsIMutationObserver)
  29
  30 NS_IMPL_ELEMENT_CLONE(HTMLTitleElement)
  31
  32 JSObject* HTMLTitleElement::WrapNode(JSContext* cx,
  33                                      JS::Handle<JSObject*> aGivenProto) {
  34   return HTMLTitleElement_Binding::Wrap(cx, this, aGivenProto);
  35 }
  36
  37 void HTMLTitleElement::GetText(DOMString& aText, ErrorResult& aError) const {
  38   if (!nsContentUtils::GetNodeTextContent(this, false, aText, fallible)) {
  39     aError = NS_ERROR_OUT_OF_MEMORY;
  40   }
  41 }
  42
  43 void HTMLTitleElement::SetText(const nsAString& aText, ErrorResult& aError) {
  44   aError = nsContentUtils::SetNodeTextContent(this, aText, true);
  45 }
  46
  47 void HTMLTitleElement::CharacterDataChanged(nsIContent* aContent,
  48                                             const CharacterDataChangeInfo&) {
  49   SendTitleChangeEvent(false);
  50 }
  51
  52 void HTMLTitleElement::ContentAppended(nsIContent* aFirstNewContent) {
  53   SendTitleChangeEvent(false);
  54 }
  55
  56 void HTMLTitleElement::ContentInserted(nsIContent* aChild) {
  57   SendTitleChangeEvent(false);
  58 }
  59
  60 void HTMLTitleElement::ContentRemoved(nsIContent* aChild,
  61                                       nsIContent* aPreviousSibling) {
  62   SendTitleChangeEvent(false);
  63 }
  64
  65 nsresult HTMLTitleElement::BindToTree(BindContext& aContext, nsINode& aParent) {
  66   // Let this fall through.
  67   nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
  68   NS_ENSURE_SUCCESS(rv, rv);
  69
  70   SendTitleChangeEvent(true);
  71
  72   return NS_OK;
  73 }
  74
  75 void HTMLTitleElement::UnbindFromTree(bool aNullParent) {
  76   SendTitleChangeEvent(false);
  77
  78   // Let this fall through.
  79   nsGenericHTMLElement::UnbindFromTree(aNullParent);
  80 }
  81
  82 void HTMLTitleElement::DoneAddingChildren(bool aHaveNotified) {
  83   if (!aHaveNotified) {
  84     SendTitleChangeEvent(false);
  85   }
  86 }
  87
  88 void HTMLTitleElement::SendTitleChangeEvent(bool aBound) {
  89   Document* doc = GetUncomposedDoc();
  90   if (doc) {
  91     doc->NotifyPossibleTitleChange(aBound);
  92   }
  93 }
  94
  95 }  // namespace mozilla::dom