mirror of
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66 lines
2.7 KiB
C++
66 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsIPercentHeightObserver_h___
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#define nsIPercentHeightObserver_h___
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struct nsHTMLReflowState;
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class nsPresContext;
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// IID for the nsIPercentHeightObserver interface
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#define NS_IPERCENTHEIGHTOBSERVER_IID \
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{ 0x9cdc174b, 0x4f39, 0x41ad, {0xbc, 0x16, 0x5a, 0xc5, 0xa8, 0x64, 0x14, 0xa1}}
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/**
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* This interface is supported by frames that need to provide computed height
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* values to children during reflow which would otherwise not happen. Currently only
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* table cells support this.
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*/
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class nsIPercentHeightObserver : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPERCENTHEIGHTOBSERVER_IID)
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// Notify the observer that aReflowState has no computed height, but it has a percent height
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virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) = 0;
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// Ask the observer if it should observe aReflowState.frame
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virtual PRBool NeedsToObserve(const nsHTMLReflowState& aReflowState) = 0;
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};
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#endif // nsIPercentHeightObserver_h___
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