#30 fix delete and paste cursor

Author: mike-ward

view_input.v

@@ -186,10 +186,10 @@ fn (cfg &InputCfg) delete(mut w Window, is_delete bool) ?string {
 	mut cursor_pos := input_state.cursor_pos
 	if cursor_pos < 0 {
 		cursor_pos = cfg.text.len
-	} else if cursor_pos > 0 || (cursor_pos == 0 && is_delete) {
+	} else if cursor_pos >= 0 {
 		if input_state.select_beg != input_state.select_end {
 			beg, end := u32_sort(input_state.select_beg, input_state.select_end)
-			if beg >= text.len || end >= text.len {
+			if beg >= text.len || end > text.len {
 				log.error('beg or end out of range (delete)')
 				return none
 			}
@@ -247,7 +247,7 @@ fn (cfg &InputCfg) insert(s string, mut w Window) !string {
 			return error('beg or end out of range (insert)')
 		}
 		text = text[..beg] + s + text[end..]
-		cursor_pos = int_min(int(beg) + 1, text.len)
+		cursor_pos = int_min(int(beg) + s.len, text.len)
 	} else {
 		if cursor_pos > text.len {
 			return error('cursor_pos out of range (insert)')