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 "nsIDocument.h"
  13 #include "nsContentUtils.h"
  14
  15
  16 NS_IMPL_NS_NEW_HTML_ELEMENT(Title)
  17
  18 namespace mozilla {
  19 namespace dom {
  20
  21 HTMLTitleElement::HTMLTitleElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
  22   : nsGenericHTMLElement(aNodeInfo)
  23 {
  24   AddMutationObserver(this);
  25 }
  26
  27 HTMLTitleElement::~HTMLTitleElement()
  28 {
  29 }
  30
  31 NS_IMPL_ISUPPORTS_INHERITED(HTMLTitleElement, nsGenericHTMLElement,
  32                             nsIMutationObserver)
  33
  34 NS_IMPL_ELEMENT_CLONE(HTMLTitleElement)
  35
  36 JSObject*
  37 HTMLTitleElement::WrapNode(JSContext* cx, JS::Handle<JSObject*> aGivenProto)
  38 {
  39   return HTMLTitleElement_Binding::Wrap(cx, this, aGivenProto);
  40 }
  41
  42 void
  43 HTMLTitleElement::GetText(DOMString& aText, ErrorResult& aError)
  44 {
  45   if (!nsContentUtils::GetNodeTextContent(this, false, aText, fallible)) {
  46     aError = NS_ERROR_OUT_OF_MEMORY;
  47   }
  48 }
  49
  50 void
  51 HTMLTitleElement::SetText(const nsAString& aText, ErrorResult& aError)
  52 {
  53   aError = nsContentUtils::SetNodeTextContent(this, aText, true);
  54 }
  55
  56 void
  57 HTMLTitleElement::CharacterDataChanged(nsIContent* aContent,
  58                                        const CharacterDataChangeInfo&)
  59 {
  60   SendTitleChangeEvent(false);
  61 }
  62
  63 void
  64 HTMLTitleElement::ContentAppended(nsIContent* aFirstNewContent)
  65 {
  66   SendTitleChangeEvent(false);
  67 }
  68
  69 void
  70 HTMLTitleElement::ContentInserted(nsIContent* aChild)
  71 {
  72   SendTitleChangeEvent(false);
  73 }
  74
  75 void
  76 HTMLTitleElement::ContentRemoved(nsIContent* aChild,
  77                                  nsIContent* aPreviousSibling)
  78 {
  79   SendTitleChangeEvent(false);
  80 }
  81
  82 nsresult
  83 HTMLTitleElement::BindToTree(nsIDocument *aDocument,
  84                              nsIContent *aParent,
  85                              nsIContent *aBindingParent,
  86                              bool aCompileEventHandlers)
  87 {
  88   // Let this fall through.
  89   nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
  90                                                  aBindingParent,
  91                                                  aCompileEventHandlers);
  92   NS_ENSURE_SUCCESS(rv, rv);
  93
  94   SendTitleChangeEvent(true);
  95
  96   return NS_OK;
  97 }
  98
  99 void
 100 HTMLTitleElement::UnbindFromTree(bool aDeep, bool aNullParent)
 101 {
 102   SendTitleChangeEvent(false);
 103
 104   // Let this fall through.
 105   nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
 106 }
 107
 108 void
 109 HTMLTitleElement::DoneAddingChildren(bool aHaveNotified)
 110 {
 111   if (!aHaveNotified) {
 112     SendTitleChangeEvent(false);
 113   }
 114 }
 115
 116 void
 117 HTMLTitleElement::SendTitleChangeEvent(bool aBound)
 118 {
 119   nsIDocument* doc = GetUncomposedDoc();
 120   if (doc) {
 121     doc->NotifyPossibleTitleChange(aBound);
 122   }
 123 }
 124
 125 } // namespace dom
 126 } // namespace mozilla