cmdline.c

   1 /*
   2  * Copyright 2005 Timo Hirvonen
   3  */
   4
   5 #include <cmdline.h>
   6
   7 #include <uchar.h>
   8 #include <xmalloc.h>
   9
  10 struct cmdline cmdline;
  11
  12 void cmdline_init(void)
  13 {
  14         cmdline.blen = 0;
  15         cmdline.clen = 0;
  16         cmdline.bpos = 0;
  17         cmdline.cpos = 0;
  18         cmdline.size = 128;
  19         cmdline.line = xnew(char, cmdline.size);
  20         cmdline.line[0] = 0;
  21 }
  22
  23 void cmdline_insert_ch(uchar ch)
  24 {
  25         int size;
  26
  27         size = u_char_size(ch);
  28         if (cmdline.blen + size > cmdline.size) {
  29                 cmdline.size *= 2;
  30                 cmdline.line = xrenew(char, cmdline.line, cmdline.size);
  31         }
  32         memmove(cmdline.line + cmdline.bpos + size,
  33                 cmdline.line + cmdline.bpos,
  34                 cmdline.blen - cmdline.bpos + 1);
  35         u_set_char_raw(cmdline.line, &cmdline.bpos, ch);
  36         cmdline.cpos++;
  37         cmdline.blen += size;
  38         cmdline.clen++;
  39 }
  40
  41 void cmdline_backspace(void)
  42 {
  43         int bpos, size;
  44
  45         if (cmdline.bpos == 0)
  46                 return;
  47
  48         bpos = cmdline.bpos;
  49         u_prev_char_pos(cmdline.line, &bpos);
  50         size = cmdline.bpos - bpos;
  51
  52         memmove(cmdline.line + bpos,
  53                 cmdline.line + cmdline.bpos,
  54                 cmdline.blen - cmdline.bpos + 1);
  55         cmdline.bpos -= size;
  56         cmdline.cpos--;
  57         cmdline.blen -= size;
  58         cmdline.clen--;
  59 }
  60
  61 void cmdline_backspace_to_bol(void)
  62 {
  63         while (cmdline.bpos)
  64                 cmdline_backspace();
  65 }
  66
  67 void cmdline_delete_ch(void)
  68 {
  69         uchar ch;
  70         int size, bpos;
  71
  72         if (cmdline.bpos == cmdline.blen)
  73                 return;
  74         bpos = cmdline.bpos;
  75         u_get_char(cmdline.line, &bpos, &ch);
  76         size = u_char_size(ch);
  77         cmdline.blen -= size;
  78         cmdline.clen--;
  79         memmove(cmdline.line + cmdline.bpos,
  80                 cmdline.line + cmdline.bpos + size,
  81                 cmdline.blen - cmdline.bpos + 1);
  82 }
  83
  84 void cmdline_set_text(const char *text)
  85 {
  86         int len = strlen(text);
  87
  88         if (len >= cmdline.size) {
  89                 while (len >= cmdline.size)
  90                         cmdline.size *= 2;
  91                 cmdline.line = xrenew(char, cmdline.line, cmdline.size);
  92         }
  93         memcpy(cmdline.line, text, len + 1);
  94         cmdline.cpos = u_strlen(cmdline.line);
  95         cmdline.bpos = len;
  96         cmdline.clen = cmdline.cpos;
  97         cmdline.blen = len;
  98 }
  99
 100 void cmdline_clear(void)
 101 {
 102         cmdline.blen = 0;
 103         cmdline.clen = 0;
 104         cmdline.bpos = 0;
 105         cmdline.cpos = 0;
 106         cmdline.line[0] = 0;
 107 }
 108
 109 void cmdline_clear_end(void)
 110 {
 111         cmdline.line[cmdline.bpos] = 0;
 112
 113         cmdline.clen = u_strlen(cmdline.line);
 114         cmdline.blen = strlen(cmdline.line);
 115 }
 116
 117 void cmdline_move_left(void)
 118 {
 119         if (cmdline.bpos > 0) {
 120                 cmdline.cpos--;
 121                 u_prev_char_pos(cmdline.line, &cmdline.bpos);
 122         }
 123 }
 124
 125 void cmdline_move_right(void)
 126 {
 127         if (cmdline.bpos < cmdline.blen) {
 128                 uchar ch;
 129
 130                 u_get_char(cmdline.line, &cmdline.bpos, &ch);
 131                 cmdline.cpos++;
 132         }
 133 }
 134
 135 void cmdline_move_home(void)
 136 {
 137         cmdline.cpos = 0;
 138         cmdline.bpos = 0;
 139 }
 140
 141 void cmdline_move_end(void)
 142 {
 143         cmdline.cpos = cmdline.clen;
 144         cmdline.bpos = cmdline.blen;
 145 }