Bug printing textbuffer window with ncurses

textbuffer.odin

package main

import "core:c"
import "core:fmt"
import "core:os"
import "core:slice"
import "core:strings"
import nc "ncurses/src"

TextBuffer :: struct {
        win:      ^nc.Window,
        rows:     [dynamic]string,
        col, row: c.int,
}

textbuffer_new :: proc(filepath: string) -> (tb: TextBuffer, success: bool) {
        file_contents: []string
        if filepath != "" {
                data := os.read_entire_file(filepath) or_return
                file_contents = strings.split(string(data), "\n")
        }

        h, w := nc.getmaxyx(nc.stdscr)
        bufwin := nc.newwin(h - 10, w, 0, 0)
        return TextBuffer{rows = slice.clone_to_dynamic(file_contents), win = bufwin}, true
}

textbuffer_free :: proc(tb: TextBuffer) -> bool {
        nc.werase(tb.win)
        nc.delwin(tb.win)
        return delete(tb.rows) == .None
}

main :: proc() {
        tb, success := textbuffer_new(os.args[1] if len(os.args) > 1 else "")
        if !success {
                fmt.eprintln("Failed to load buffer from %s.", os.args[1])
                return
        }
        defer textbuffer_free(tb)

        nc.initscr()
        nc.noecho()
        nc.curs_set(0)
        nc.cbreak()
        nc.refresh()
        defer nc.endwin()

        for {
                nc.erase()
                nc.werase(tb.win)

                for row in tb.rows {
                        nc.wprintw(tb.win, "%s\n", row)
                }

                nc.wrefresh(tb.win)
                nc.refresh()
        }
}