dom/base/StyleSheetList.h

   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 #ifndef mozilla_dom_StyleSheetList_h
   8 #define mozilla_dom_StyleSheetList_h
   9
  10 #include "nsContentUtils.h"
  11 #include "mozilla/dom/DocumentOrShadowRoot.h"
  12 #include "nsStubMutationObserver.h"
  13 #include "nsWrapperCache.h"
  14
  15 class nsINode;
  16
  17 namespace mozilla {
  18 class StyleSheet;
  19
  20 namespace dom {
  21
  22 class StyleSheetList final : public nsStubMutationObserver,
  23                              public nsWrapperCache {
  24  public:
  25   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  26   NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(StyleSheetList)
  27
  28   NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
  29
  30   explicit StyleSheetList(DocumentOrShadowRoot& aScope);
  31
  32   JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
  33
  34   nsINode* GetParentObject() const {
  35     return mDocumentOrShadowRoot ? &mDocumentOrShadowRoot->AsNode() : nullptr;
  36   }
  37
  38   uint32_t Length() const {
  39     return mDocumentOrShadowRoot ? mDocumentOrShadowRoot->SheetCount() : 0;
  40   }
  41
  42   StyleSheet* IndexedGetter(uint32_t aIndex, bool& aFound) const {
  43     if (!mDocumentOrShadowRoot) {
  44       aFound = false;
  45       return nullptr;
  46     }
  47
  48     StyleSheet* sheet = mDocumentOrShadowRoot->SheetAt(aIndex);
  49     aFound = !!sheet;
  50     return sheet;
  51   }
  52
  53   StyleSheet* Item(uint32_t aIndex) const {
  54     bool dummy = false;
  55     return IndexedGetter(aIndex, dummy);
  56   }
  57
  58  protected:
  59   virtual ~StyleSheetList();
  60
  61   DocumentOrShadowRoot*
  62       mDocumentOrShadowRoot;  // Weak, cleared on "NodeWillBeDestroyed".
  63 };
  64
  65 }  // namespace dom
  66 }  // namespace mozilla
  67
  68 #endif  // mozilla_dom_StyleSheetList_h