From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- layout/generic/nsIStatefulFrame.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 layout/generic/nsIStatefulFrame.h (limited to 'layout/generic/nsIStatefulFrame.h') diff --git a/layout/generic/nsIStatefulFrame.h b/layout/generic/nsIStatefulFrame.h new file mode 100644 index 000000000..9205bb8c9 --- /dev/null +++ b/layout/generic/nsIStatefulFrame.h @@ -0,0 +1,39 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * interface for rendering objects whose state is saved in + * session-history (back-forward navigation) + */ + +#ifndef _nsIStatefulFrame_h +#define _nsIStatefulFrame_h + +#include "nsContentUtils.h" +#include "nsQueryFrame.h" + +class nsPresState; + +class nsIStatefulFrame +{ + public: + NS_DECL_QUERYFRAME_TARGET(nsIStatefulFrame) + + // Save the state for this frame. If this method succeeds, the caller is + // responsible for deleting the resulting state when done with it. + NS_IMETHOD SaveState(nsPresState** aState) = 0; + + // Restore the state for this frame from aState + NS_IMETHOD RestoreState(nsPresState* aState) = 0; + + // Generate a key for this stateful frame + NS_IMETHOD GenerateStateKey(nsIContent* aContent, + nsIDocument* aDocument, + nsACString& aKey) + { + return nsContentUtils::GenerateStateKey(aContent, aDocument, aKey); + }; +}; + +#endif /* _nsIStatefulFrame_h */ -- cgit v1.2.3