From a88d71431d4a41a10df3c0a9baa4223688bbc50b Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 06 Aug 2021 19:53:44 -0400
Subject: tk: Handle text input

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

diff --git a/src/tk/text.c b/src/tk/text.c
index 1a84a14..c624678 100644
--- a/src/tk/text.c
+++ b/src/tk/text.c
@@ -29,7 +29,7 @@ struct mftk_text {
 	struct mftk_widget  parent;
 	char                min_char;
 	char                max_char;
-	size_t              len;
+	int                 len;
 	int                 cur;
 	int                 y;
 	int                 w;
@@ -52,11 +52,13 @@ _mftk_text_layout(struct mftk_widget *w __attribute__((__unused__)))
 static void
 _mftk_text_focus(struct mftk_widget *w __attribute__((__unused__)))
 {
+	SDL_StartTextInput();
 }
 
 static void
 _mftk_text_defocus(struct mftk_widget *w __attribute__((__unused__)))
 {
+	SDL_StopTextInput();
 }
 
 static int
@@ -65,6 +67,8 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 	struct mftk_text *t = (struct mftk_text *) w;
 	int               len;
 	int               i;
+	int               newlen;
+	int               j;
 
 	switch (e->type) {
 		case SDL_KEYDOWN:
@@ -115,6 +119,27 @@ _mftk_text_key_event(struct mftk_widget *w, SDL_Event *e)
 					break;
 			}
 			break;
+		case SDL_TEXTEDITING:
+			/* TODO */
+			break;
+		case SDL_TEXTINPUT:
+			len = strlen(t->val);
+			newlen = strlen(e->text.text);
+			if (len + newlen > t->len) {
+				newlen = t->len - len;
+			}
+			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;
+				t->val[t->cur + i] = e->text.text[j];
+				++i;
+			}
+			t->cur += i;
+			SDL_DestroyTexture(t->texture);
+			t->texture = NULL;
+			break;
 		default:
 			break;
 	}
@@ -246,7 +271,7 @@ _mftk_text_destroy(struct mftk_widget *w)
 }
 
 struct mftk_widget *
-mftk_text_new(char min_char, char max_char, size_t len, const char *val,
+mftk_text_new(char min_char, char max_char, int len, const char *val,
 		TTF_Font *font, SDL_Color *color)
 {
 	struct mftk_widget *w;
--
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