badge/ui/browser.c

   1 #include "browser.h"
   2 #include "menu.h"
   3
   4 #include <drivers/fatfs/ff.h>
   5 #include <string.h>
   6
   7 enum {
   8   LINE_LENGTH = 16,
   9   FNAME_MAX = 12,
  10   BUFLEN = LINE_LENGTH + 1 + FNAME_MAX + 1
  11 };
  12
  13 static void badge_browse_textfile_fd(FIL *fd) {
  14   unsigned linecount = 0;
  15
  16   {
  17     char buf[LINE_LENGTH];
  18     while(f_gets(buf, LINE_LENGTH, fd)) {
  19       ++linecount;
  20     }
  21   }
  22
  23   if(FR_OK != f_lseek(fd, 0)) {
  24     return;
  25   }
  26
  27   char lines_buf[linecount][LINE_LENGTH];
  28   char const *lines[linecount];
  29   unsigned i;
  30
  31   for(i = 0; i < linecount && f_gets(lines_buf[i], LINE_LENGTH, fd); ++i) {
  32     lines[i] = lines_buf[i];
  33   }
  34
  35   badge_scroll_text(lines, i);
  36 }
  37
  38 static uint8_t badge_count_lines_in_file(FIL *fd) {
  39   uint8_t count = 0;
  40
  41   if(FR_OK == f_lseek(fd, 0)) {
  42     char buf[BUFLEN];
  43     while(f_gets(buf, BUFLEN, fd)) {
  44       ++count;
  45     }
  46   }
  47
  48   return count;
  49 }
  50
  51 static uint8_t badge_browse_pick_filename_from_fd(char *buf, uint8_t *first_visible, uint8_t *selected, FIL *fd) {
  52   unsigned linecount = badge_count_lines_in_file(fd);
  53
  54   if(FR_OK != f_lseek(fd, 0)) {
  55     return 1;
  56   }
  57
  58   char        menu_buf  [linecount + 1][BUFLEN];
  59   char const *menu_index[linecount + 1];
  60   char       *fnames    [linecount + 1];
  61   unsigned i;
  62
  63   for(i = 0; i < linecount && f_gets(menu_buf[i], BUFLEN, fd); ++i) {
  64     menu_index[i] = menu_buf[i];
  65     char *p;
  66     for(p = menu_buf[i]; *p && *p != '|'; ++p)
  67       ;
  68     if(*p) {
  69       *p++ = '\0';
  70     }
  71     fnames[i] = p;
  72   }
  73
  74   strcpy(menu_buf[i], "Zurück");
  75   menu_index[i] = menu_buf[i];
  76   uint8_t choice = badge_menu(menu_index, i + 1, first_visible, *selected);
  77
  78   if(choice == linecount) {
  79     return 1; // exit
  80   }
  81
  82   *selected = choice;
  83   strncpy(buf, fnames[*selected], FNAME_MAX);
  84   buf[FNAME_MAX] = '\0';
  85
  86   return 0;
  87 }
  88
  89 static uint8_t badge_pick_filename(char *buf, char const *menufile, uint8_t *first_visible, uint8_t *selected) {
  90   FIL fd;
  91   uint8_t err = 1;
  92
  93   if(FR_OK == f_open(&fd, menufile, FA_OPEN_EXISTING | FA_READ)) {
  94     err = badge_browse_pick_filename_from_fd(buf, first_visible, selected, &fd);
  95     f_close(&fd);
  96   }
  97
  98   return err;
  99 }
 100
 101 void badge_browse_textfile(char const *fname) {
 102   FIL fd;
 103
 104   if(FR_OK == f_open(&fd, fname, FA_OPEN_EXISTING | FA_READ)) {
 105     badge_browse_textfile_fd(&fd);
 106     f_close(&fd);
 107   }
 108 }
 109
 110 void badge_browse_textfiles(char const *menufile, uint8_t *selected) {
 111   char buf[FNAME_MAX + 1];
 112   uint8_t first_visible = *selected;
 113
 114   while(0 == badge_pick_filename(buf, menufile, &first_visible, selected)) {
 115     badge_browse_textfile(buf);
 116   }
 117 }