/* -*- 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 Communications 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 ***** */ /* constants for what needs to be recomputed in response to style changes */ #ifndef nsChangeHint_h___ #define nsChangeHint_h___ #include "prtypes.h" // Defines for various style related constants enum nsChangeHint { // change was visual only (e.g., COLOR=) nsChangeHint_RepaintFrame = 0x01, // For reflow, we want flags to give us arbitrary FrameNeedsReflow behavior. // just do a FrameNeedsReflow nsChangeHint_NeedReflow = 0x02, // Invalidate intrinsic widths on the frame's ancestors. Must not be set // without setting nsChangeHint_NeedReflow. nsChangeHint_ClearAncestorIntrinsics = 0x04, // Invalidate intrinsic widths on the frame's descendants. Must not be set // without also setting nsChangeHint_ClearAncestorIntrinsics. nsChangeHint_ClearDescendantIntrinsics = 0x08, // Force unconditional reflow of all descendants. Must not be set without // setting nsChangeHint_NeedReflow, but is independent of both the // Clear*Intrinsics flags. nsChangeHint_NeedDirtyReflow = 0x10, // change requires view to be updated, if there is one (e.g., clip:) nsChangeHint_SyncFrameView = 0x20, // The currently shown mouse cursor needs to be updated nsChangeHint_UpdateCursor = 0x40, /** * SVG filter/mask/clip effects need to be recomputed because the URI * in the filter/mask/clip-path property has changed. This wipes * out cached nsSVGPropertyBase and subclasses which hold a reference to * the element referenced by the URI, and a mutation observer for * the DOM subtree rooted at that element. Also, for filters they store a * bounding-box for the filter result so that if the filter changes we can * invalidate the old covered area. */ nsChangeHint_UpdateEffects = 0x80, /** * Visual change only, but the change can be handled entirely by * updating the layer(s) for the frame. */ nsChangeHint_UpdateOpacityLayer = 0x100, nsChangeHint_UpdateTransformLayer = 0x200, // change requires frame change (e.g., display:). // This subsumes all the above. nsChangeHint_ReconstructFrame = 0x400 }; // 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) {} // 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 nsChangeHint_ReflowFrame \ nsChangeHint(nsChangeHint_NeedReflow | \ nsChangeHint_ClearAncestorIntrinsics | \ nsChangeHint_ClearDescendantIntrinsics | \ nsChangeHint_NeedDirtyReflow) #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|. When no * restyling is necessary, use |nsRestyleHint(0)|. */ enum nsRestyleHint { eRestyle_Self = 0x1, eRestyle_Subtree = 0x2, /* self and descendants */ eRestyle_LaterSiblings = 0x4 /* implies "and descendants" */ }; #endif /* nsChangeHint_h___ */