X-Git-Url: https://git.rohieb.name/hackover2013-badge-firmware.git/blobdiff_plain/05db94c84b6f7e4ee91fd67d6e1a8d97a2b97f2e..e943514377152f441aac2b6540df34244f6de79b:/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 <drivers/fatfs/ff.h>
+#include <string.h>
 
 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);
+  }
+}