lua/isocline/src/attr.h

   1 /* ----------------------------------------------------------------------------
   2   Copyright (c) 2021, Daan Leijen
   3   This is free software; you can redistribute it and/or modify it
   4   under the terms of the MIT License. A copy of the license can be
   5   found in the "LICENSE" file at the root of this distribution.
   6 -----------------------------------------------------------------------------*/
   7 #pragma once
   8 #ifndef IC_ATTR_H
   9 #define IC_ATTR_H
  10
  11 #include "common.h"
  12 #include "stringbuf.h"
  13
  14 //-------------------------------------------------------------
  15 // text attributes
  16 //-------------------------------------------------------------
  17
  18 #define IC_ON   (1)
  19 #define IC_OFF  (-1)
  20 #define IC_NONE (0)
  21
  22 // try to fit in 64 bits
  23 // note: order is important for some compilers
  24 // note: each color can actually be 25 bits
  25 typedef union attr_s {
  26   struct {
  27     unsigned int  color:28;
  28     signed int    bold:2;
  29     signed int    reverse:2;
  30     unsigned int  bgcolor:28;
  31     signed int    underline:2;
  32     signed int    italic:2;
  33   } x;
  34   uint64_t        value;
  35 } attr_t;
  36
  37 ic_private attr_t attr_none(void);
  38 ic_private attr_t attr_default(void);
  39 ic_private attr_t attr_from_color( ic_color_t color );
  40
  41 ic_private bool attr_is_none(attr_t attr);
  42 ic_private bool attr_is_eq(attr_t attr1, attr_t attr2);
  43
  44 ic_private attr_t attr_update_with( attr_t attr, attr_t newattr );
  45
  46 ic_private attr_t attr_from_sgr( const char* s, ssize_t len);
  47 ic_private attr_t attr_from_esc_sgr( const char* s, ssize_t len);
  48
  49 //-------------------------------------------------------------
  50 // attribute buffer used for rich rendering
  51 //-------------------------------------------------------------
  52
  53 struct attrbuf_s;
  54 typedef struct attrbuf_s attrbuf_t;
  55
  56 ic_private attrbuf_t*     attrbuf_new( alloc_t* mem );
  57 ic_private void           attrbuf_free( attrbuf_t* ab );  // ab can be NULL
  58 ic_private void           attrbuf_clear( attrbuf_t* ab ); // ab can be NULL
  59 ic_private ssize_t        attrbuf_len( attrbuf_t* ab);    // ab can be NULL
  60 ic_private const attr_t*  attrbuf_attrs( attrbuf_t* ab, ssize_t expected_len );
  61 ic_private ssize_t        attrbuf_append_n( stringbuf_t* sb, attrbuf_t* ab, const char* s, ssize_t len, attr_t attr );
  62
  63 ic_private void           attrbuf_set_at( attrbuf_t* ab, ssize_t pos, ssize_t count, attr_t attr );
  64 ic_private void           attrbuf_update_at( attrbuf_t* ab, ssize_t pos, ssize_t count, attr_t attr );
  65 ic_private void           attrbuf_insert_at( attrbuf_t* ab, ssize_t pos, ssize_t count, attr_t attr );
  66
  67 ic_private attr_t         attrbuf_attr_at( attrbuf_t* ab, ssize_t pos );
  68 ic_private void           attrbuf_delete_at( attrbuf_t* ab, ssize_t pos, ssize_t count );
  69
  70 #endif // IC_ATTR_H