use crate::text_input::{Cursor, Value}; pub struct Editor<'a> { value: &'a mut Value, cursor: &'a mut Cursor, } impl<'a> Editor<'a> { pub fn new(value: &'a mut Value, cursor: &'a mut Cursor) -> Editor<'a> { Editor { value, cursor } } pub fn contents(&self) -> String { self.value.to_string() } pub fn insert(&mut self, character: char) { if let Some((left, right)) = self.cursor.selection(self.value) { self.cursor.move_left(self.value); self.value.remove_many(left, right); } self.value.insert(self.cursor.end(self.value), character); self.cursor.move_right(self.value); } pub fn paste(&mut self, content: Value) { let length = content.len(); if let Some((left, right)) = self.cursor.selection(self.value) { self.cursor.move_left(self.value); self.value.remove_many(left, right); } self.value.insert_many(self.cursor.end(self.value), content); self.cursor.move_right_by_amount(self.value, length); } pub fn backspace(&mut self) { match self.cursor.selection(self.value) { Some((start, end)) => { self.cursor.move_left(self.value); self.value.remove_many(start, end); } None => { let start = self.cursor.start(self.value); if start > 0 { self.cursor.move_left(self.value); self.value.remove(start - 1); } } } } pub fn delete(&mut self) { match self.cursor.selection(self.value) { Some(_) => { self.backspace(); } None => { let end = self.cursor.end(self.value); if end < self.value.len() { self.value.remove(end); } } } } }