From 8a18a2bf527debfc78e4f826ac86d62fd53762ef Mon Sep 17 00:00:00 2001
From: WormHeamer
Date: Wed, 5 Nov 2025 04:44:44 -0500
Subject: ghuh

---
 main.c | 54 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 45 insertions(+), 9 deletions(-)

(limited to 'main.c')

diff --git a/main.c b/main.c
index f380d97..2ab4eba 100644
--- a/main.c
+++ b/main.c
@@ -21,9 +21,8 @@
 
 /* TODO
  *
- * - utf-8 input
- * - arrow keys
- * - KEY_RESIZE or draw callback
+ * - clean up keyboard input
+ * - separate out library interface
  * - maybe some custom colors
  */
 
@@ -165,6 +164,24 @@ static void vui_clear(void) {
 	clear_buf(vui_win.front);
 }
 
+void vui_fill_rect(VuiChar c, VuiAttr a, int x0, int y0, int width, int height) {
+	if (x0 < 0) { width += x0; x0 = 0; }
+	if (y0 < 0) { height += y0; y0 = 0; }
+	if (x0 + width >= COLS) width = (COLS - 1) - x0;
+	if (y0 + height >= LINES) height = (LINES - 1) - y0;
+	if (width < 1 || height < 1) return;
+	for (int y = y0; y < y0 + height; y++) {
+		for (int x = x0; x < x0 + width; x++) {
+			CHR(x, y) = c;
+			ATTR(x, y) = a;
+		}
+	}
+}
+
+void vui_fill(VuiChar c, VuiAttr a) {
+	vui_fill_rect(c, a, 0, 0, COLS, LINES);
+}
+
 static void resize_buf(VuiBuffer *buf, unsigned nw, unsigned nh) {
 	VuiChar *nchr  = calloc(nw * nh, sizeof(*buf->chr));
 	uint16_t *nattr = calloc(nw * nh, sizeof(*buf->attr));
@@ -675,6 +692,27 @@ static inline u32 utf8_next(u32 *p, const char *s, u32 n) {
 	return cp;
 }
 
+void vui_putsna(int x, int y, const char *s, unsigned n, VuiAttr a) {
+	for (unsigned i = 0; i < n && x < COLS;) {
+		u32 c = utf8_next(&i, s, n);
+		CHR(x, y) = c;
+		ATTR(x, y) = a;
+		x++;
+	}
+}
+
+void vui_putsn(int x, int y, const char *s, unsigned n) {
+	return vui_putsna(x, y, s, n, ATTR_DEFAULT);
+}
+
+void vui_putsa(int x, int y, const char *s, VuiAttr a) {
+	return vui_putsna(x, y, s, strlen(s), a);
+}
+
+void vui_puts(int x, int y, const char *s) {
+	return vui_putsn(x, y, s, strlen(s));
+}
+
 int vui_avprintf(int x, int y, VuiAttr a, const char *fmt, va_list ap) {
 	va_list ap2;
 	va_copy(ap2, ap);
@@ -685,12 +723,7 @@ int vui_avprintf(int x, int y, VuiAttr a, const char *fmt, va_list ap) {
 	if (n > 0) {
 		char buf[n + 1];
 		vsnprintf(buf, n + 1, fmt, ap2);
-		for (unsigned i = 0; i < n && x < COLS;) {
-			u32 c = utf8_next(&i, buf, n);
-			CHR(x, y) = c;
-			ATTR(x, y) = a;
-			x++;
-		}
+		vui_putsna(x, y, buf, n, a);
 	}
 	return n;
 }
@@ -925,6 +958,9 @@ int main(int argc, const char **argv) {
 		int top = 5;
 		int bottom = LINES - 5;
 
+		vui_fill(' ', FG_BLACK | BG_BLUE);
+		vui_fill_rect(' ', FG_BLACK | BG_WHITE, left, top, right - left, bottom - top);
+
 		if (y < top)  { scroll_y = top - y; }
 		if (y > bottom)  { scroll_y = bottom - y; }
 
-- 
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