X-Git-Url: https://git.rohieb.name/hackover2013-badge-firmware.git/blobdiff_plain/05db94c84b6f7e4ee91fd67d6e1a8d97a2b97f2e..3deacf340c59a89b862f228d251307e71a9c9189:/badge/ui/browser.c diff --git a/badge/ui/browser.c b/badge/ui/browser.c index 39a4d8a..a5abb1a 100644 --- a/badge/ui/browser.c +++ b/badge/ui/browser.c @@ -2,9 +2,12 @@ #include "menu.h" #include +#include enum { - LINE_LENGTH = 16 + LINE_LENGTH = 16, + FNAME_MAX = 12, + BUFLEN = LINE_LENGTH + 1 + FNAME_MAX + 1 }; static void badge_browse_textfile_fd(FIL *fd) { @@ -32,10 +35,83 @@ static void badge_browse_textfile_fd(FIL *fd) { badge_scroll_text(lines, i); } +static uint8_t badge_count_lines_in_file(FIL *fd) { + uint8_t count = 0; + + if(FR_OK == f_lseek(fd, 0)) { + char buf[BUFLEN]; + while(f_gets(buf, BUFLEN, fd)) { + ++count; + } + } + + return count; +} + +static uint8_t badge_browse_pick_filename_from_fd(char *buf, uint8_t *first_visible, uint8_t *selected, FIL *fd) { + unsigned linecount = badge_count_lines_in_file(fd); + + if(FR_OK != f_lseek(fd, 0)) { + return 1; + } + + char menu_buf [linecount + 1][BUFLEN]; + char const *menu_index[linecount + 1]; + char *fnames [linecount + 1]; + unsigned i; + + for(i = 0; i < linecount && f_gets(menu_buf[i], BUFLEN, fd); ++i) { + menu_index[i] = menu_buf[i]; + char *p; + for(p = menu_buf[i]; *p && *p != '|'; ++p) + ; + if(*p) { + *p++ = '\0'; + } + fnames[i] = p; + } + + strcpy(menu_buf[i], "Zurück"); + menu_index[i] = menu_buf[i]; + uint8_t choice = badge_menu(menu_index, i + 1, first_visible, *selected); + + if(choice == linecount) { + return 1; // exit + } + + *selected = choice; + strncpy(buf, fnames[*selected], FNAME_MAX); + buf[FNAME_MAX] = '\0'; + + return 0; +} + +static uint8_t badge_pick_filename(char *buf, char const *menufile, uint8_t *first_visible, uint8_t *selected) { + FIL fd; + uint8_t err = 1; + + if(FR_OK == f_open(&fd, menufile, FA_OPEN_EXISTING | FA_READ)) { + err = badge_browse_pick_filename_from_fd(buf, first_visible, selected, &fd); + f_close(&fd); + } + + return err; +} + void badge_browse_textfile(char const *fname) { FIL fd; + if(FR_OK == f_open(&fd, fname, FA_OPEN_EXISTING | FA_READ)) { badge_browse_textfile_fd(&fd); f_close(&fd); } } + +void badge_browse_textfiles(char const *menufile, uint8_t *selected) { + char buf[FNAME_MAX + 1]; + uint8_t first_visible = *selected; + + while(0 == badge_pick_filename(buf, menufile, &first_visible, selected)) { + badge_browse_textfile(buf); + } +}