dom/base/DocumentFragment.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 /*
   8  * Implementation of DOM Core's DocumentFragment.
   9  */
  10
  11 #include "mozilla/dom/DocumentFragment.h"
  12 #include "mozilla/dom/Element.h"  // for NS_IMPL_ELEMENT_CLONE
  13 #include "mozilla/dom/NodeInfo.h"
  14 #include "nsNodeInfoManager.h"
  15 #include "nsError.h"
  16 #include "nsGkAtoms.h"
  17 #include "nsDOMString.h"
  18 #include "nsContentUtils.h"  // for NS_INTERFACE_MAP_ENTRY_TEAROFF
  19 #include "mozilla/dom/DocumentFragmentBinding.h"
  20 #include "nsPIDOMWindow.h"
  21 #include "mozilla/dom/Document.h"
  22 #include "mozilla/IntegerPrintfMacros.h"
  23
  24 namespace mozilla::dom {
  25
  26 JSObject* DocumentFragment::WrapNode(JSContext* aCx,
  27                                      JS::Handle<JSObject*> aGivenProto) {
  28   return DocumentFragment_Binding::Wrap(aCx, this, aGivenProto);
  29 }
  30
  31 bool DocumentFragment::IsNodeOfType(uint32_t aFlags) const { return false; }
  32
  33 #ifdef MOZ_DOM_LIST
  34 void DocumentFragment::List(FILE* out, int32_t aIndent) const {
  35   int32_t indent;
  36   for (indent = aIndent; --indent >= 0;) {
  37     fputs("  ", out);
  38   }
  39
  40   fprintf(out, "DocumentFragment@%p", (void*)this);
  41
  42   fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
  43   fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
  44
  45   nsIContent* child = GetFirstChild();
  46   if (child) {
  47     fputs("\n", out);
  48
  49     for (; child; child = child->GetNextSibling()) {
  50       child->List(out, aIndent + 1);
  51     }
  52
  53     for (indent = aIndent; --indent >= 0;) {
  54       fputs("  ", out);
  55     }
  56   }
  57
  58   fputs(">\n", out);
  59 }
  60
  61 void DocumentFragment::DumpContent(FILE* out, int32_t aIndent,
  62                                    bool aDumpAll) const {
  63   int32_t indent;
  64   for (indent = aIndent; --indent >= 0;) {
  65     fputs("  ", out);
  66   }
  67
  68   fputs("<DocumentFragment>", out);
  69
  70   if (aIndent) {
  71     fputs("\n", out);
  72   }
  73
  74   for (nsIContent* child = GetFirstChild(); child;
  75        child = child->GetNextSibling()) {
  76     int32_t indent = aIndent ? aIndent + 1 : 0;
  77     child->DumpContent(out, indent, aDumpAll);
  78   }
  79   for (indent = aIndent; --indent >= 0;) {
  80     fputs("  ", out);
  81   }
  82   fputs("</DocumentFragment>", out);
  83
  84   if (aIndent) {
  85     fputs("\n", out);
  86   }
  87 }
  88 #endif
  89
  90 /* static */
  91 already_AddRefed<DocumentFragment> DocumentFragment::Constructor(
  92     const GlobalObject& aGlobal, ErrorResult& aRv) {
  93   nsCOMPtr<nsPIDOMWindowInner> window =
  94       do_QueryInterface(aGlobal.GetAsSupports());
  95   if (!window || !window->GetDoc()) {
  96     aRv.Throw(NS_ERROR_FAILURE);
  97     return nullptr;
  98   }
  99
 100   return window->GetDoc()->CreateDocumentFragment();
 101 }
 102
 103 NS_IMPL_CYCLE_COLLECTION_INHERITED(DocumentFragment, FragmentOrElement, mHost)
 104
 105 // QueryInterface implementation for DocumentFragment
 106 NS_INTERFACE_MAP_BEGIN(DocumentFragment)
 107   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
 108   NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(DocumentFragment)
 109   NS_INTERFACE_MAP_ENTRY(nsIContent)
 110   NS_INTERFACE_MAP_ENTRY(nsINode)
 111   NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
 112   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
 113                                  new nsNodeSupportsWeakRefTearoff(this))
 114   // DOM bindings depend on the identity pointer being the
 115   // same as nsINode (which nsIContent inherits).
 116   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContent)
 117 NS_INTERFACE_MAP_END
 118
 119 NS_IMPL_ADDREF_INHERITED(DocumentFragment, FragmentOrElement)
 120 NS_IMPL_RELEASE_INHERITED(DocumentFragment, FragmentOrElement)
 121
 122 NS_IMPL_ELEMENT_CLONE(DocumentFragment)
 123
 124 }  // namespace mozilla::dom