src/third_party/WebKit/Source/core/rendering/PointerEventsHitRules.cpp

   1 /*
   2     Copyright (C) 2007 Rob Buis <buis@kde.org>
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     aint with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include "config.h"
  21 #include "core/rendering/PointerEventsHitRules.h"
  22
  23 #include "wtf/Assertions.h"
  24
  25 namespace blink {
  26
  27 struct SameSizeAsPointerEventsHitRules {
  28     unsigned bitfields;
  29 };
  30
  31 COMPILE_ASSERT(sizeof(PointerEventsHitRules) <= sizeof(SameSizeAsPointerEventsHitRules), PointerEventsHitRules_should_stay_small);
  32
  33 PointerEventsHitRules::PointerEventsHitRules(EHitTesting hitTesting, const HitTestRequest& request, EPointerEvents pointerEvents)
  34     : requireVisible(false)
  35     , requireFill(false)
  36     , requireStroke(false)
  37     , canHitStroke(false)
  38     , canHitFill(false)
  39     , canHitBoundingBox(false)
  40 {
  41     if (request.svgClipContent())
  42         pointerEvents = PE_FILL;
  43
  44     if (hitTesting == SVG_GEOMETRY_HITTESTING) {
  45         switch (pointerEvents)
  46         {
  47             case PE_BOUNDINGBOX:
  48                 canHitBoundingBox = true;
  49                 break;
  50             case PE_VISIBLE_PAINTED:
  51             case PE_AUTO: // "auto" is like "visiblePainted" when in SVG content
  52                 requireFill = true;
  53                 requireStroke = true;
  54             case PE_VISIBLE:
  55                 requireVisible = true;
  56                 canHitFill = true;
  57                 canHitStroke = true;
  58                 break;
  59             case PE_VISIBLE_FILL:
  60                 requireVisible = true;
  61                 canHitFill = true;
  62                 break;
  63             case PE_VISIBLE_STROKE:
  64                 requireVisible = true;
  65                 canHitStroke = true;
  66                 break;
  67             case PE_PAINTED:
  68                 requireFill = true;
  69                 requireStroke = true;
  70             case PE_ALL:
  71                 canHitFill = true;
  72                 canHitStroke = true;
  73                 break;
  74             case PE_FILL:
  75                 canHitFill = true;
  76                 break;
  77             case PE_STROKE:
  78                 canHitStroke = true;
  79                 break;
  80             case PE_NONE:
  81                 // nothing to do here, defaults are all false.
  82                 break;
  83         }
  84     } else {
  85         switch (pointerEvents)
  86         {
  87             case PE_BOUNDINGBOX:
  88                 canHitBoundingBox = true;
  89                 break;
  90             case PE_VISIBLE_PAINTED:
  91             case PE_AUTO: // "auto" is like "visiblePainted" when in SVG content
  92                 requireVisible = true;
  93                 requireFill = true;
  94                 requireStroke = true;
  95                 canHitFill = true;
  96                 canHitStroke = true;
  97                 break;
  98             case PE_VISIBLE_FILL:
  99             case PE_VISIBLE_STROKE:
 100             case PE_VISIBLE:
 101                 requireVisible = true;
 102                 canHitFill = true;
 103                 canHitStroke = true;
 104                 break;
 105             case PE_PAINTED:
 106                 requireFill = true;
 107                 requireStroke = true;
 108                 canHitFill = true;
 109                 canHitStroke = true;
 110                 break;
 111             case PE_FILL:
 112             case PE_STROKE:
 113             case PE_ALL:
 114                 canHitFill = true;
 115                 canHitStroke = true;
 116                 break;
 117             case PE_NONE:
 118                 // nothing to do here, defaults are all false.
 119                 break;
 120         }
 121     }
 122 }
 123
 124 }
 125
 126 // vim:ts=4:noet