cmdline.c

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