XULPersist.h (1755B)
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_XULPersist_h 8 #define mozilla_dom_XULPersist_h 9 10 #include "nsStubDocumentObserver.h" 11 12 #ifndef MOZ_NEW_XULSTORE 13 # include "nsCOMPtr.h" 14 class nsIXULStore; 15 #endif 16 17 template <typename T> 18 class nsCOMArray; 19 20 namespace mozilla::dom { 21 22 /** 23 * This class synchronizes element attributes (such as window sizing) with the 24 * live elements in a Document and with the XULStore. The XULStore persists 25 * these attributes to the file system. This class is created and owned by the 26 * Document and must only be created in the parent process. It only presists 27 * chrome document element attributes. 28 */ 29 class XULPersist final : public nsStubDocumentObserver { 30 public: 31 NS_DECL_ISUPPORTS 32 33 explicit XULPersist(Document* aDocument); 34 void Init(); 35 void DropDocumentReference(); 36 37 NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED 38 39 protected: 40 void Persist(mozilla::dom::Element* aElement, nsAtom* aAttribute); 41 42 private: 43 ~XULPersist(); 44 nsresult ApplyPersistentAttributes(); 45 nsresult ApplyPersistentAttributesToElements(const nsAString& aID, 46 const nsAString& aDocURI, 47 nsCOMArray<Element>& aElements); 48 49 nsCOMPtr<nsIXULStore> mLocalStore; 50 51 // A weak pointer to our document. Nulled out by DropDocumentReference. 52 Document* MOZ_NON_OWNING_REF mDocument; 53 }; 54 55 } // namespace mozilla::dom 56 57 #endif // mozilla_dom_XULPersist_h