home *** CD-ROM | disk | FTP | other *** search
- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef nsChangeHint_h___
- #define nsChangeHint_h___
-
- #include "prtypes.h"
-
- // Defines for various style related constants
-
- enum nsChangeHint {
- nsChangeHint_RepaintFrame = 0x01, // change was visual only (e.g., COLOR=)
- nsChangeHint_ReflowFrame = 0x02, // change requires reflow (e.g., WIDTH=)
- nsChangeHint_SyncFrameView = 0x04, // change requires view to be updated, if there is one (e.g., clip:)
- nsChangeHint_UpdateCursor = 0x08, // The currently shown mouse cursor needs to be updated
- nsChangeHint_ReconstructFrame = 0x10 // change requires frame change (e.g., display:)
- // This subsumes all the above
- // TBD: add nsChangeHint_ForceFrameView to force frame reconstruction if the frame doesn't yet
- // have a view
- };
-
- #ifdef DEBUG_roc
- // Redefine these operators to return nothing. This will catch any use
- // of these operators on hints. We should not be using these operators
- // on nsChangeHints
- inline void operator<(nsChangeHint s1, nsChangeHint s2) {}
- inline void operator>(nsChangeHint s1, nsChangeHint s2) {}
- inline void operator!=(nsChangeHint s1, nsChangeHint s2) {}
- inline void operator==(nsChangeHint s1, nsChangeHint s2) {}
- inline void operator<=(nsChangeHint s1, nsChangeHint s2) {}
- inline void operator>=(nsChangeHint s1, nsChangeHint s2) {}
- #endif
-
- // Operators on nsChangeHints
-
- // Merge two hints, taking the union
- inline nsChangeHint NS_CombineHint(nsChangeHint aH1, nsChangeHint aH2) {
- return (nsChangeHint)(aH1 | aH2);
- }
-
- // Merge two hints, taking the union
- inline nsChangeHint NS_SubtractHint(nsChangeHint aH1, nsChangeHint aH2) {
- return (nsChangeHint)(aH1 & ~aH2);
- }
-
- // Merge the "src" hint into the "dst" hint
- // Returns true iff the destination changed
- inline PRBool NS_UpdateHint(nsChangeHint& aDest, nsChangeHint aSrc) {
- nsChangeHint r = (nsChangeHint)(aDest | aSrc);
- PRBool changed = (int)r != (int)aDest;
- aDest = r;
- return changed;
- }
-
- // Returns true iff the second hint contains all the hints of the first hint
- inline PRBool NS_IsHintSubset(nsChangeHint aSubset, nsChangeHint aSuperSet) {
- return (aSubset & aSuperSet) == aSubset;
- }
-
- // Redefine the old NS_STYLE_HINT constants in terms of the new hint structure
- #define NS_STYLE_HINT_NONE \
- nsChangeHint(0)
- #define NS_STYLE_HINT_VISUAL \
- nsChangeHint(nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView)
- #define NS_STYLE_HINT_REFLOW \
- nsChangeHint(NS_STYLE_HINT_VISUAL | nsChangeHint_ReflowFrame)
- #define NS_STYLE_HINT_FRAMECHANGE \
- nsChangeHint(NS_STYLE_HINT_REFLOW | nsChangeHint_ReconstructFrame)
-
-
- /**
- * |nsReStyleHint| is a bitfield for the result of |HasStateDependentStyle|
- * and |HasAttributeDependentStyle|. All values have an implied "and
- * descendants." When no restyling is necesary, use |nsReStyleHint(0)|.
- */
- enum nsReStyleHint {
- eReStyle_Self = 0x1,
- eReStyle_LaterSiblings = 0x2
- };
-
-
- #endif /* nsChangeHint_h___ */
-