workbench/classes/datatypes/html/common.h

   1 /*
   2     Copyright © 2004, Martin Gierich. All rights reserved.
   3     Licensed under the terms of the AROS Public License (APL)
   4     $Id$
   5
   6     Desc: Structs for both HTML parser and layout engine
   7 */
   8
   9 #ifndef TRUE
  10 #define TRUE -1
  11 #define FALSE 0
  12 #endif
  13
  14 typedef char* string;
  15 #define G(o) ((struct Gadget *)(o))
  16 #ifdef __AROS__
  17 #include <clib/alib_protos.h>
  18 #include <proto/exec.h>
  19 #define MALLOC(pool,size) AllocPooled((pool),(size))
  20 #define MFREE(pool,ptr)
  21 typedef unsigned char u_char;
  22 typedef unsigned short u_short;
  23 #undef DEBUG
  24 #define DEBUG 1
  25 #include <aros/debug.h>
  26 #define printf bug
  27
  28 #else
  29
  30 #define MALLOC(pool,size) malloc(size)
  31 #define MFREE(pool,ptr) free(ptr)
  32
  33 #endif
  34
  35 /*******************************************************************************************/
  36 /* Prototypes */
  37
  38 /* Types */
  39 typedef union _para_flags para_flags;
  40 typedef union _style_flags style_flags;
  41 typedef struct _image_struct image_struct;
  42 typedef struct _seg_struct seg_struct;
  43 typedef struct _page_struct page_struct;
  44 typedef struct _parse_struct parse_struct;
  45 typedef struct _layout_struct layout_struct;
  46
  47 /* General */
  48 page_struct *   parse_init( void *mempool );
  49 int             parse_do( page_struct *page, string inbuf, int inbufbytes );
  50 int             parse_end( page_struct *page );
  51 void            parse_free( page_struct *page );
  52 int             layout_init( page_struct *page );
  53 int             layout_do( page_struct *page, int winwidth, int *width, int *height );
  54 void            layout_free( page_struct *page );
  55
  56 /*******************************************************************************************/
  57 /* Structures common to parse and layout */
  58
  59 struct _page_struct
  60 {
  61         string          title;
  62         void            *mempool;
  63         seg_struct      *seglist;
  64         parse_struct    *pdata;
  65         layout_struct   *ldata;
  66 };
  67
  68 struct p_flags
  69 {
  70         u_short align:2;
  71 #define ALIGN_LEFT      0
  72 #define ALIGN_RIGHT     1
  73 #define ALIGN_CENTER    2
  74 #define ALIGN_JUSTIFY   3
  75         u_short nowordwrap:1;
  76 } __attribute__((packed));
  77
  78 union _para_flags
  79 {
  80         u_short         value;
  81         struct p_flags  fl;
  82 } __attribute__((packed));
  83
  84 struct s_flags
  85 {
  86         u_short fontsize:4;
  87         u_short bold:1;
  88         u_short italics:1;
  89         u_short underlined:1;
  90         u_short fixedwidth:1;
  91 } __attribute__((packed));
  92
  93 union _style_flags
  94 {
  95         u_short         value;
  96         struct s_flags  fl;
  97 } __attribute__((packed));
  98
  99 struct _image_struct
 100 {
 101         string  src;
 102         string  alt;
 103         int     width;
 104         int     height;
 105 };
 106
 107 /*******************************************************************************************/
 108 /* Text Segments */
 109
 110 enum SegCmd
 111 {
 112         SEG_CMD_Next,
 113         SEG_CMD_Sublist,
 114         SEG_CMD_Blockstart,
 115         SEG_CMD_Blockend,
 116         SEG_CMD_Text,
 117         SEG_CMD_Linebreak,
 118         SEG_CMD_Image,
 119         SEG_CMD_Ruler,
 120         SEG_CMD_Parastyle,
 121         SEG_CMD_Softstyle,
 122         SEG_CMD_MAX
 123 };
 124
 125 #define SEG_CMD_MASK    0x1f
 126 #define SEG_CMD_LAST    0x80
 127
 128 struct _seg_struct
 129 {
 130         u_char          cmd;
 131         u_char          pad;
 132         union
 133         {
 134                 u_short         textlen;
 135                 u_short         flags;
 136                 style_flags     stylemask;
 137                 para_flags      paramask;
 138         };
 139         union
 140         {
 141                 string          textseg;
 142                 seg_struct      *next;
 143                 seg_struct      *sublist;
 144                 image_struct    *image;
 145                 style_flags     styleflags;
 146                 para_flags      paraflags;
 147         };
 148 } __attribute__((packed));
 149
 150 /*******************************************************************************************/
 151 /* Layout Prototypes */
 152 int             text_len( layout_struct *ldata, string str, int strlen );
 153 int             text_height( layout_struct *ldata );
 154 int             text_fit( layout_struct *ldata, string str, int strlen, int *strsize, int maxwidth );
 155
 156 int             linelist_init( layout_struct *ldata );
 157 void *          linelist_store( layout_struct *ldata, string textseg, u_short textlen,
 158                         u_short xpos, u_short ypos, u_short width, u_short height, style_flags style, int linebreak );
 159 void *          linelist_addlf( layout_struct *ldata, void * line );
 160 void            linelist_free( layout_struct *ldata );
 161
 162 /*******************************************************************************************/
 163 /* Private Layout Data */
 164
 165 struct _layout_struct
 166 {
 167         void            *userdata;
 168         void            *oldline;
 169         int             nowordwrap;
 170         int             xsize;
 171         int             xpos;
 172         int             fontheight;
 173         int             indent;
 174         para_flags      paraflags;
 175         style_flags     styleflags;
 176 };