From 8b52102fa434b35d2797e59f7afe80a44acad21b Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 24 Dec 2021 01:04:41 -0500
Subject: tk/text: Replace min_char and max_char with allowed_chars

---
diff --git a/src/defs.h b/src/defs.h
index 50380ec..ba67c29 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -101,4 +101,7 @@
 #define MF_COLOR_EEYE_B 0xDF
 #define MF_COLOR_EEYE_A 0xFF
 
+/* Text widget digits */
+#define MF_DIGITS "0123456789"
+
 #endif  /* MF_DEFS_H_ */
diff --git a/src/game.c b/src/game.c
index e544aa1..1db249a 100644
--- a/src/game.c
+++ b/src/game.c
@@ -52,7 +52,7 @@ static struct mftk_widget *
 _mf_game_form(SDL_Renderer *renderer, TTF_Font *text_font,
 		struct _mf_game *game)
 {
-	game->timer = mftk_text_new('\0', '\0', 5, "00:00", text_font,
+	game->timer = mftk_text_new(MF_DIGITS ":", 5, "00:00", text_font,
 			SDL_FALSE, NULL, NULL, NULL, NULL);
 	return mftk_grid_new(2, 1, MF_ROW_M, MF_COL_M,
 			game->timer,
diff --git a/src/menu.c b/src/menu.c
index 53b530c..e82cf93 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -172,10 +172,10 @@ _mf_menu_form(SDL_Renderer *renderer, TTF_Font *text_font,
 		return NULL;
 	}
 
-	menu->seed_text = mftk_text_new('0', '9', rand_max_len, menu->seed_buf,
+	menu->seed_text = mftk_text_new(MF_DIGITS, rand_max_len, menu->seed_buf,
 			text_font, SDL_TRUE, &_mf_menu_isdigit, &_mf_menu_seed,
 			&_mf_menu_play, menu);
-	menu->enemies_text = mftk_text_new('0', '9', 2, menu->enemies_buf,
+	menu->enemies_text = mftk_text_new(MF_DIGITS, 2, menu->enemies_buf,
 			text_font, SDL_TRUE, &_mf_menu_isdigit,
 			&_mf_menu_enemies, &_mf_menu_play, menu);
 	grid = mftk_grid_new(6, 2, MF_ROW_M, MF_COL_M,
diff --git a/src/tk.h b/src/tk.h
index 90b0bcf..55ac0a3 100644
--- a/src/tk.h
+++ b/src/tk.h
@@ -70,7 +70,7 @@ mftk_radio_new(int butn_width, int butn_padding, int label_padding,
 		int state, int options, ...);
 
 struct mftk_widget *
-mftk_text_new(char min_char, char max_char, int len, const char *val,
+mftk_text_new(const char *allowed_chars, int len, const char *val,
 		TTF_Font *font, int editable, int (*allowed)(void *, char),
 		int (*action)(void *, const char *), int (*submit)(void *),
 		void *user_data);
diff --git a/src/tk/text.c b/src/tk/text.c
index c96c924..644200b 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -28,8 +28,7 @@
 
 struct mftk_text {
 	struct mftk_widget   parent;
-	char                 min_char;
-	char                 max_char;
+	const char          *allowed_chars;
 	int                  len;
 	int                  cur;
 	int                  y;
@@ -307,7 +306,7 @@ _mftk_text_destroy(struct mftk_widget *w)
 }
 
 struct mftk_widget *
-mftk_text_new(char min_char, char max_char, int len, const char *val,
+mftk_text_new(const char *allowed_chars, int len, const char *val,
 		TTF_Font *font, int editable, int (*allowed)(void *, char),
 		int (*action)(void *, const char *), int (*submit)(void *),
 		void *user_data)
@@ -323,18 +322,17 @@ mftk_text_new(char min_char, char max_char, int len, const char *val,
 		mftk_widget_init(w, t, text);
 	}
 
-	t->min_char  = min_char;
-	t->max_char  = max_char;
-	t->len       = len;
-	t->font      = font;
-	t->line_skip = TTF_FontLineSkip(font);
-	t->ascent    = TTF_FontAscent  (font);
-	t->texture   = NULL;
-	t->editable  = editable;
-	t->allowed   = allowed;
-	t->action    = action;
-	t->submit    = submit;
-	t->user_data = user_data;
+	t->allowed_chars = allowed_chars;
+	t->len           = len;
+	t->font          = font;
+	t->line_skip     = TTF_FontLineSkip(font);
+	t->ascent        = TTF_FontAscent  (font);
+	t->texture       = NULL;
+	t->editable      = editable;
+	t->allowed       = allowed;
+	t->action        = action;
+	t->submit        = submit;
+	t->user_data     = user_data;
 
 	t->val = calloc(len + 1, sizeof(*t->val));
 	if (t->val == NULL) {
@@ -361,7 +359,7 @@ mftk_text_new(char min_char, char max_char, int len, const char *val,
 	memcpy(t->val, val, t->cur);
 
 	w->w = 0;
-	for (ch = min_char; ch <= max_char; ++ch) {
+	for (ch = allowed_chars[0]; ch != '\0'; ++ch) {
 		if (TTF_GlyphMetrics(font, ch, NULL, NULL, NULL, NULL, &advance)
 				< 0) {
 			SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
--
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