LCOV - code coverage report
Current view: directory - objdir/dist/include/mozilla/gfx - BaseMargin.h (source / functions) Found Hit Coverage
Test: app.info Lines: 26 0 0.0 %
Date: 2012-06-02 Functions: 27 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2                 :  * ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla Corporation code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Robert O'Callahan <robert@ocallahan.org>
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #ifndef MOZILLA_GFX_BASEMARGIN_H_
      39                 : #define MOZILLA_GFX_BASEMARGIN_H_
      40                 : 
      41                 : #include "Types.h"
      42                 : 
      43                 : namespace mozilla {
      44                 : namespace gfx {
      45                 : 
      46                 : /**
      47                 :  * Do not use this class directly. Subclass it, pass that subclass as the
      48                 :  * Sub parameter, and only use that subclass.
      49                 :  */
      50                 : template <class T, class Sub>
      51                 : struct BaseMargin {
      52                 :   typedef mozilla::css::Side SideT;
      53                 : 
      54                 :   // Do not change the layout of these members; the Side() methods below
      55                 :   // depend on this order.
      56                 :   T top, right, bottom, left;
      57                 : 
      58                 :   // Constructors
      59               0 :   BaseMargin() : top(0), right(0), bottom(0), left(0) {}
      60               0 :   BaseMargin(T aLeft, T aTop, T aRight, T aBottom) :
      61               0 :       top(aTop), right(aRight), bottom(aBottom), left(aLeft) {}
      62                 : 
      63               0 :   void SizeTo(T aLeft, T aTop, T aRight, T aBottom)
      64                 :   {
      65               0 :     left = aLeft; top = aTop; right = aRight; bottom = aBottom;
      66               0 :   }
      67                 : 
      68               0 :   T LeftRight() const { return left + right; }
      69               0 :   T TopBottom() const { return top + bottom; }
      70                 : 
      71               0 :   T& Side(SideT aSide) {
      72                 :     // This is ugly!
      73               0 :     return *(&top + aSide);
      74                 :   }
      75               0 :   T Side(SideT aSide) const {
      76                 :     // This is ugly!
      77               0 :     return *(&top + aSide);
      78                 :   }
      79                 : 
      80                 :   // Overloaded operators. Note that '=' isn't defined so we'll get the
      81                 :   // compiler generated default assignment operator
      82               0 :   bool operator==(const Sub& aMargin) const {
      83                 :     return left == aMargin.left && top == aMargin.top &&
      84               0 :            right == aMargin.right && bottom == aMargin.bottom;
      85                 :   }
      86               0 :   bool operator!=(const Sub& aMargin) const {
      87               0 :     return !(*this == aMargin);
      88                 :   }
      89               0 :   Sub operator+(const Sub& aMargin) const {
      90                 :     return Sub(left + aMargin.left, top + aMargin.top,
      91               0 :              right + aMargin.right, bottom + aMargin.bottom);
      92                 :   }
      93               0 :   Sub operator-(const Sub& aMargin) const {
      94                 :     return Sub(left - aMargin.left, top - aMargin.top,
      95               0 :              right - aMargin.right, bottom - aMargin.bottom);
      96                 :   }
      97               0 :   Sub& operator+=(const Sub& aMargin) {
      98               0 :     left += aMargin.left;
      99               0 :     top += aMargin.top;
     100               0 :     right += aMargin.right;
     101               0 :     bottom += aMargin.bottom;
     102               0 :     return *static_cast<Sub*>(this);
     103                 :   }
     104                 : };
     105                 : 
     106                 : }
     107                 : }
     108                 : 
     109                 : #endif /* MOZILLA_GFX_BASEMARGIN_H_ */

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