From f1210cea09c85c5c972d691d38b3b59f2cdbb15f Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Sat, 25 Sep 2021 13:05:52 -0400
Subject: tk/text: Replace min_char, max_char with callback

---
(limited to 'src/tk/text.c')

diff --git a/src/tk/text.c b/src/tk/text.c
index ccfaf7f..f509c14 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -42,6 +42,7 @@ struct mftk_text {
 	SDL_Color           *color;
 	SDL_Texture         *texture;
 	int                  editable;
+	int                (*allowed)(void *, char);
 	int                (*action)(void *, const char *);
 	int                (*submit)(void *);
 	void                *user_data;
@@ -144,8 +145,11 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 			for (i = 0, j = 0;
 					i < newlen && e->text.text[j] != '\0';
 					++j) {
-				if (e->text.text[j] < t->min_char) continue;
-				if (e->text.text[j] > t->max_char) continue;
+				if (t->allowed != NULL &&
+						t->allowed(t->user_data,
+							e->text.text[j]) <= 0) {
+					continue;
+				}
 				t->val[t->cur + i] = e->text.text[j];
 				++i;
 			}
@@ -299,6 +303,7 @@ _mftk_text_destroy(struct mftk_widget *w)
 struct mftk_widget *
 mftk_text_new(char min_char, char max_char, int len, const char *val,
 		TTF_Font *font, SDL_Color *color, int editable,
+		int (*allowed)(void *, char),
 		int (*action)(void *, const char *), int (*submit)(void *),
 		void *user_data)
 {
@@ -322,6 +327,7 @@ mftk_text_new(char min_char, char max_char, int len, const char *val,
 	t->color     = color;
 	t->texture   = NULL;
 	t->editable  = editable;
+	t->allowed   = allowed;
 	t->action    = action;
 	t->submit    = submit;
 	t->user_data = user_data;
--
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