ui/ncurses: Dynamically align text fields in nc-config

[petitboot] / ui / ncurses / nc-boot-editor.c

diff --git a/ui/ncurses/nc-boot-editor.c b/ui/ncurses/nc-boot-editor.c
index 3d4621b3db75baddda777537179493a524faa131..d3529d1ba011e2200df64247beb022fe9f8fe139 100644 (file)
--- a/ui/ncurses/nc-boot-editor.c
+++ b/ui/ncurses/nc-boot-editor.c
@@ -22,6 +22,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include "log/log.h"
 #include "talloc/talloc.h"
@@ -509,6 +510,36 @@ void boot_editor_update(struct boot_editor *boot_editor,
        pad_refresh(boot_editor);
 }
 
+/* Return the number of columns required to display a localised string */
+static int strncols(const char *str)
+{
+       int i, wlen, ncols = 0;
+       wchar_t *wstr;
+
+       wlen = mbstowcs(NULL, str, 0);
+       if (wlen <= 0)
+               return wlen;
+
+       wstr = malloc(sizeof(wchar_t) * wlen + 1);
+       if (!wstr)
+               return -1;
+
+       wlen = mbstowcs(wstr, str, wlen);
+       if (wlen <= 0) {
+               free(wstr);
+               return wlen;
+       }
+
+       /* Processing each character individually lets us use the same
+        * check for all languages */
+       for (i = 0; i < wlen; i++) {
+               ncols += wcwidth(wstr[i]);
+       }
+
+       free(wstr);
+       return ncols;
+}
+
 struct boot_editor *boot_editor_init(struct cui *cui,
                struct pmenu_item *item,
                const struct system_info *sysinfo,
@@ -529,8 +560,11 @@ struct boot_editor *boot_editor_init(struct cui *cui,
        boot_editor->on_exit = on_exit;
        boot_editor->state = STATE_EDIT;
 
+       int ncols1 = strncols(_("Device tree:"));
+       int ncols2 = strncols(_("Boot arguments:"));
+
        boot_editor->label_x = 1;
-       boot_editor->field_x = 17;
+       boot_editor->field_x = 2 + max(ncols1, ncols2);
 
        nc_scr_init(&boot_editor->scr, pb_boot_editor_sig, 0,
                        cui, boot_editor_process_key,