use eframe::egui::{self, scroll_area::State};
use ropey;

#[derive(Default)]
pub struct ERopey {
    pub rope: ropey::Rope,
    viewbuffer: String,
}

impl egui::widgets::TextBuffer for ERopey {
    fn is_mutable(&self) -> bool {
        true
    }

    fn as_str(&self) -> &str {
        self.rope.slice(..).as_str().unwrap()
    }

    fn insert_text(&mut self, text: &str, char_index: usize) -> usize {
        let first = self.rope.len_chars();
        self.rope.insert(char_index, text);
        let second = self.rope.len_chars();
        second-first
    }

    fn delete_char_range(&mut self, char_range: std::ops::Range<usize>) {
        self.rope.remove(char_range);
    }

    fn type_id(&self) -> std::any::TypeId {
        std::any::TypeId::of::<Self>()
    }
}