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Diffstat (limited to '')
| -rw-r--r-- | layout/base/nsIPercentBSizeObserver.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/layout/base/nsIPercentBSizeObserver.h b/layout/base/nsIPercentBSizeObserver.h new file mode 100644 index 0000000000..f11e1e2774 --- /dev/null +++ b/layout/base/nsIPercentBSizeObserver.h @@ -0,0 +1,33 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#ifndef nsIPercentBSizeObserver_h___ +#define nsIPercentBSizeObserver_h___ + +#include "nsQueryFrame.h" + +namespace mozilla { +struct ReflowInput; +} // namespace mozilla + +/** + * This interface is supported by frames that need to provide computed bsize + * values to children during reflow which would otherwise not happen. Currently + * only table cells support this. + */ +class nsIPercentBSizeObserver { + public: + NS_DECL_QUERYFRAME_TARGET(nsIPercentBSizeObserver) + + // Notify the observer that aReflowInput has no computed bsize, + // but it has a percent bsize + virtual void NotifyPercentBSize(const mozilla::ReflowInput& aReflowInput) = 0; + + // Ask the observer if it should observe aReflowInput.frame + virtual bool NeedsToObserve(const mozilla::ReflowInput& aReflowInput) = 0; +}; + +#endif // nsIPercentBSizeObserver_h___ |