src/plugins/litehtml_viewer/litehtml/box.h

   1 #pragma once\r
   2 \r
   3 namespace litehtml\r
   4 {\r
   5         class html_tag;\r
   6 \r
   7         enum box_type\r
   8         {\r
   9                 box_block,\r
  10                 box_line\r
  11         };\r
  12 \r
  13         class box\r
  14         {\r
  15         public:\r
  16                 typedef std::unique_ptr<litehtml::box>  ptr;\r
  17                 typedef std::vector< box::ptr >                 vector;\r
  18         protected:\r
  19                 int             m_box_top;\r
  20                 int             m_box_left;\r
  21                 int             m_box_right;\r
  22         public:\r
  23                 box(int top, int left, int right)\r
  24                 {\r
  25                         m_box_top       = top;\r
  26                         m_box_left      = left;\r
  27                         m_box_right     = right;\r
  28                 }\r
  29                 virtual ~box() {}\r
  30 \r
  31                 int             bottom()        { return m_box_top + height();  }\r
  32                 int             top()           { return m_box_top;                             }\r
  33                 int             right()         { return m_box_left + width();  }\r
  34                 int             left()          { return m_box_left;                    }\r
  35 \r
  36                 virtual litehtml::box_type      get_type() = 0;\r
  37                 virtual int                                     height() = 0;\r
  38                 virtual int                                     width() = 0;\r
  39                 virtual void                            add_element(const element::ptr &el) = 0;\r
  40                 virtual bool                            can_hold(const element::ptr &el, white_space ws) = 0;\r
  41                 virtual void                            finish(bool last_box = false) = 0;\r
  42                 virtual bool                            is_empty() = 0;\r
  43                 virtual int                                     baseline() = 0;\r
  44                 virtual void                            get_elements(elements_vector& els) = 0;\r
  45                 virtual int                                     top_margin() = 0;\r
  46                 virtual int                                     bottom_margin() = 0;\r
  47                 virtual void                            y_shift(int shift) = 0;\r
  48                 virtual void                            new_width(int left, int right, elements_vector& els) = 0;\r
  49         };\r
  50 \r
  51         //////////////////////////////////////////////////////////////////////////\r
  52 \r
  53         class block_box : public box\r
  54         {\r
  55                 element::ptr m_element;\r
  56         public:\r
  57                 block_box(int top, int left, int right) : box(top, left, right)\r
  58                 {\r
  59                         m_element = 0;\r
  60                 }\r
  61 \r
  62                 virtual litehtml::box_type      get_type();\r
  63                 virtual int                                     height();\r
  64                 virtual int                                     width();\r
  65                 virtual void                            add_element(const element::ptr &el);\r
  66                 virtual bool                            can_hold(const element::ptr &el, white_space ws);\r
  67                 virtual void                            finish(bool last_box = false);\r
  68                 virtual bool                            is_empty();\r
  69                 virtual int                                     baseline();\r
  70                 virtual void                            get_elements(elements_vector& els);\r
  71                 virtual int                                     top_margin();\r
  72                 virtual int                                     bottom_margin();\r
  73                 virtual void                            y_shift(int shift);\r
  74                 virtual void                            new_width(int left, int right, elements_vector& els);\r
  75         };\r
  76 \r
  77         //////////////////////////////////////////////////////////////////////////\r
  78 \r
  79         class line_box : public box\r
  80         {\r
  81                 elements_vector                 m_items;\r
  82                 int                                             m_height;\r
  83                 int                                             m_width;\r
  84                 int                                             m_line_height;\r
  85                 font_metrics                    m_font_metrics;\r
  86                 int                                             m_baseline;\r
  87                 text_align                              m_text_align;\r
  88         public:\r
  89                 line_box(int top, int left, int right, int line_height, font_metrics& fm, text_align align) : box(top, left, right)\r
  90                 {\r
  91                         m_height                = 0;\r
  92                         m_width                 = 0;\r
  93                         m_font_metrics  = fm;\r
  94                         m_line_height   = line_height;\r
  95                         m_baseline              = 0;\r
  96                         m_text_align    = align;\r
  97                 }\r
  98 \r
  99                 virtual litehtml::box_type      get_type();\r
 100                 virtual int                                     height();\r
 101                 virtual int                                     width();\r
 102                 virtual void                            add_element(const element::ptr &el);\r
 103                 virtual bool                            can_hold(const element::ptr &el, white_space ws);\r
 104                 virtual void                            finish(bool last_box = false);\r
 105                 virtual bool                            is_empty();\r
 106                 virtual int                                     baseline();\r
 107                 virtual void                            get_elements(elements_vector& els);\r
 108                 virtual int                                     top_margin();\r
 109                 virtual int                                     bottom_margin();\r
 110                 virtual void                            y_shift(int shift);\r
 111                 virtual void                            new_width(int left, int right, elements_vector& els);\r
 112 \r
 113         private:\r
 114                 bool                                            have_last_space();\r
 115                 bool                                            is_break_only();\r
 116         };\r
 117 }