LCOV - code coverage report
Current view: directory - gfx/2d - BasePoint.h (source / functions) Found Hit Coverage
Test: app.info Lines: 12 0 0.0 %
Date: 2012-06-02 Functions: 6 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_BASEPOINT_H_
      39                 : #define MOZILLA_GFX_BASEPOINT_H_
      40                 : 
      41                 : namespace mozilla {
      42                 : namespace gfx {
      43                 : 
      44                 : /**
      45                 :  * Do not use this class directly. Subclass it, pass that subclass as the
      46                 :  * Sub parameter, and only use that subclass. This allows methods to safely
      47                 :  * cast 'this' to 'Sub*'.
      48                 :  */
      49                 : template <class T, class Sub>
      50                 : struct BasePoint {
      51                 :   T x, y;
      52                 : 
      53                 :   // Constructors
      54               0 :   BasePoint() : x(0), y(0) {}
      55               0 :   BasePoint(T aX, T aY) : x(aX), y(aY) {}
      56                 : 
      57                 :   void MoveTo(T aX, T aY) { x = aX; y = aY; }
      58                 :   void MoveBy(T aDx, T aDy) { x += aDx; y += aDy; }
      59                 : 
      60                 :   // Note that '=' isn't defined so we'll get the
      61                 :   // compiler generated default assignment operator
      62                 : 
      63                 :   bool operator==(const Sub& aPoint) const {
      64                 :     return x == aPoint.x && y == aPoint.y;
      65                 :   }
      66                 :   bool operator!=(const Sub& aPoint) const {
      67                 :     return x != aPoint.x || y != aPoint.y;
      68                 :   }
      69                 : 
      70               0 :   Sub operator+(const Sub& aPoint) const {
      71               0 :     return Sub(x + aPoint.x, y + aPoint.y);
      72                 :   }
      73                 :   Sub operator-(const Sub& aPoint) const {
      74                 :     return Sub(x - aPoint.x, y - aPoint.y);
      75                 :   }
      76               0 :   Sub& operator+=(const Sub& aPoint) {
      77               0 :     x += aPoint.x;
      78               0 :     y += aPoint.y;
      79               0 :     return *static_cast<Sub*>(this);
      80                 :   }
      81                 :   Sub& operator-=(const Sub& aPoint) {
      82                 :     x -= aPoint.x;
      83                 :     y -= aPoint.y;
      84                 :     return *static_cast<Sub*>(this);
      85                 :   }
      86                 : 
      87               0 :   Sub operator*(T aScale) const {
      88               0 :     return Sub(x * aScale, y * aScale);
      89                 :   }
      90               0 :   Sub operator/(T aScale) const {
      91               0 :     return Sub(x / aScale, y / aScale);
      92                 :   }
      93                 : 
      94                 :   Sub operator-() const {
      95                 :     return Sub(-x, -y);
      96                 :   }
      97                 : };
      98                 : 
      99                 : }
     100                 : }
     101                 : 
     102                 : #endif /* MOZILLA_GFX_BASEPOINT_H_ */

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