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')

diff --git a/src/tk.h b/src/tk.h
index b7a7a8f..c7c5a51 100644
--- a/src/tk.h
+++ b/src/tk.h
@@ -75,7 +75,7 @@ mftk_radio_new(int butn_width, int butn_padding, SDL_Color *butn_color,
 		SDL_Renderer *renderer, int state, int options, ...);
 
 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 *
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;
diff --git a/src/tk/window.c b/src/tk/window.c
index 651a37b..5062f24 100644
--- a/src/tk/window.c
+++ b/src/tk/window.c
@@ -95,6 +95,9 @@ mftk_window_event(struct mftk_window *w, SDL_Event *e)
 							e);
 			}
 			break;
+		case SDL_TEXTEDITING:
+		case SDL_TEXTINPUT:
+			return mftk_widget_key_event(w->focus, e);
 		case SDL_MOUSEBUTTONUP:
 			return mftk_widget_mouse_event(w->root, e, 0, 0);
 		default:
--
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