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 #ifdef MOZ_DOM_LIST
  32 void DocumentFragment::List(FILE* out, int32_t aIndent) const {
  33   int32_t indent;
  34   for (indent = aIndent; --indent >= 0;) {
  35     fputs("  ", out);
  36   }
  37
  38   fprintf(out, "DocumentFragment@%p", (void*)this);
  39
  40   fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
  41   fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
  42
  43   nsIContent* child = GetFirstChild();
  44   if (child) {
  45     fputs("\n", out);
  46
  47     for (; child; child = child->GetNextSibling()) {
  48       child->List(out, aIndent + 1);
  49     }
  50
  51     for (indent = aIndent; --indent >= 0;) {
  52       fputs("  ", out);
  53     }
  54   }
  55
  56   fputs(">\n", out);
  57 }
  58
  59 void DocumentFragment::DumpContent(FILE* out, int32_t aIndent,
  60                                    bool aDumpAll) const {
  61   int32_t indent;
  62   for (indent = aIndent; --indent >= 0;) {
  63     fputs("  ", out);
  64   }
  65
  66   fputs("<DocumentFragment>", out);
  67
  68   if (aIndent) {
  69     fputs("\n", out);
  70   }
  71
  72   for (nsIContent* child = GetFirstChild(); child;
  73        child = child->GetNextSibling()) {
  74     int32_t indent = aIndent ? aIndent + 1 : 0;
  75     child->DumpContent(out, indent, aDumpAll);
  76   }
  77   for (indent = aIndent; --indent >= 0;) {
  78     fputs("  ", out);
  79   }
  80   fputs("</DocumentFragment>", out);
  81
  82   if (aIndent) {
  83     fputs("\n", out);
  84   }
  85 }
  86 #endif
  87
  88 /* static */
  89 already_AddRefed<DocumentFragment> DocumentFragment::Constructor(
  90     const GlobalObject& aGlobal, ErrorResult& aRv) {
  91   nsCOMPtr<nsPIDOMWindowInner> window =
  92       do_QueryInterface(aGlobal.GetAsSupports());
  93   if (!window || !window->GetDoc()) {
  94     aRv.Throw(NS_ERROR_FAILURE);
  95     return nullptr;
  96   }
  97
  98   return window->GetDoc()->CreateDocumentFragment();
  99 }
 100
 101 NS_IMPL_CYCLE_COLLECTION_INHERITED(DocumentFragment, FragmentOrElement, mHost)
 102
 103 // QueryInterface implementation for DocumentFragment
 104 NS_INTERFACE_MAP_BEGIN(DocumentFragment)
 105   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
 106   NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(DocumentFragment)
 107   NS_INTERFACE_MAP_ENTRY(nsIContent)
 108   NS_INTERFACE_MAP_ENTRY(nsINode)
 109   NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
 110   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
 111                                  new nsNodeSupportsWeakRefTearoff(this))
 112   // DOM bindings depend on the identity pointer being the
 113   // same as nsINode (which nsIContent inherits).
 114   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContent)
 115 NS_INTERFACE_MAP_END
 116
 117 NS_IMPL_ADDREF_INHERITED(DocumentFragment, FragmentOrElement)
 118 NS_IMPL_RELEASE_INHERITED(DocumentFragment, FragmentOrElement)
 119
 120 NS_IMPL_ELEMENT_CLONE(DocumentFragment)
 121
 122 }  // namespace mozilla::dom