LCOV - app.info - layout/generic/nsBlockReflowContext.h

LCOV - code coverage report
| Current view: | directory - layout/generic - nsBlockReflowContext.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 3 | 0 | 0.0 %
| Date: | 2012-07-07 | Functions: | 2 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
           2                 : // vim:cindent:ts=2:et:sw=2:
           3                 : /* ***** BEGIN LICENSE BLOCK *****
           4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           5                 :  *
           6                 :  * The contents of this file are subject to the Mozilla Public License Version
           7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           8                 :  * the License. You may obtain a copy of the License at
           9                 :  * http://www.mozilla.org/MPL/
          10                 :  *
          11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          13                 :  * for the specific language governing rights and limitations under the
          14                 :  * License.
          15                 :  *
          16                 :  * The Original Code is Mozilla Communicator client code.
          17                 :  *
          18                 :  * The Initial Developer of the Original Code is
          19                 :  * Netscape Communications Corporation.
          20                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 :
          39                 : /* class that a parent frame uses to reflow a block frame */
          40                 :
          41                 : #ifndef nsBlockReflowContext_h___
          42                 : #define nsBlockReflowContext_h___
          43                 :
          44                 : #include "nsIFrame.h"
          45                 : #include "nsHTMLReflowMetrics.h"
          46                 :
          47                 : class nsBlockFrame;
          48                 : class nsBlockReflowState;
          49                 : struct nsHTMLReflowState;
          50                 : class nsLineBox;
          51                 : class nsIFrame;
          52                 : class nsPresContext;
          53                 : class nsLineLayout;
          54                 : struct nsStylePosition;
          55                 : struct nsBlockHorizontalAlign;
          56                 :
          57                 : /**
          58                 :  * An encapsulation of the state and algorithm for reflowing block frames.
          59                 :  */
          60                 : class nsBlockReflowContext {
          61                 : public:
          62                 :   nsBlockReflowContext(nsPresContext* aPresContext,
          63                 :                        const nsHTMLReflowState& aParentRS);
          64               0 :   ~nsBlockReflowContext() { }
          65                 :
          66                 :   nsresult ReflowBlock(const nsRect&       aSpace,
          67                 :                        bool                aApplyTopMargin,
          68                 :                        nsCollapsingMargin& aPrevMargin,
          69                 :                        nscoord             aClearance,
          70                 :                        bool                aIsAdjacentWithTop,
          71                 :                        nsLineBox*          aLine,
          72                 :                        nsHTMLReflowState&  aReflowState,
          73                 :                        nsReflowStatus&     aReflowStatus,
          74                 :                        nsBlockReflowState& aState);
          75                 :
          76                 :   bool PlaceBlock(const nsHTMLReflowState& aReflowState,
          77                 :                     bool                     aForceFit,
          78                 :                     nsLineBox*               aLine,
          79                 :                     nsCollapsingMargin&      aBottomMarginResult /* out */,
          80                 :                     nsRect&                  aInFlowBounds,
          81                 :                     nsOverflowAreas&         aOverflowAreas,
          82                 :                     nsReflowStatus           aReflowStatus);
          83                 :
          84                 :   nsCollapsingMargin& GetCarriedOutBottomMargin() {
          85                 :     return mMetrics.mCarriedOutBottomMargin;
          86                 :   }
          87                 :
          88                 :   nscoord GetTopMargin() const {
          89                 :     return mTopMargin.get();
          90                 :   }
          91                 :
          92               0 :   const nsHTMLReflowMetrics& GetMetrics() const {
          93               0 :     return mMetrics;
          94                 :   }
          95                 :
          96                 :   /**
          97                 :    * Computes the collapsed top margin for a block whose reflow state is in aRS.
          98                 :    * The computed margin is added into aMargin.
          99                 :    * If aClearanceFrame is null then this is the first optimistic pass which shall assume
         100                 :    * that no frames have clearance, and we clear the HasClearance on all frames encountered.
         101                 :    * If non-null, this is the second pass and
         102                 :    * the caller has decided aClearanceFrame needs clearance (and we will
         103                 :    * therefore stop collapsing there); also, this function is responsible for marking
         104                 :    * it with SetHasClearance.
         105                 :    * If in the optimistic pass any frame is encountered that might possibly need
         106                 :    * clearance (i.e., if we really needed the optimism assumption) then we set aMayNeedRetry
         107                 :    * to true.
         108                 :    * We return true if we changed the clearance state of any line and marked it dirty.
         109                 :    */
         110                 :   static bool ComputeCollapsedTopMargin(const nsHTMLReflowState& aRS,
         111                 :                                           nsCollapsingMargin* aMargin, nsIFrame* aClearanceFrame,
         112                 :                                           bool* aMayNeedRetry, bool* aIsEmpty = nsnull);
         113                 :
         114                 : protected:
         115                 :   nsPresContext* mPresContext;
         116                 :   const nsHTMLReflowState& mOuterReflowState;
         117                 :
         118                 :   nsIFrame* mFrame;
         119                 :   nsRect mSpace;
         120                 :
         121                 :   nscoord mX, mY;
         122                 :   nsHTMLReflowMetrics mMetrics;
         123                 :   nsCollapsingMargin mTopMargin;
         124                 : };
         125                 :
         126                 : #endif /* nsBlockReflowContext_h___ */

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