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89 lines
2.9 KiB
Rust
89 lines
2.9 KiB
Rust
use crate::components::compute_character_width;
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use crate::event::Key;
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use unicode_width::UnicodeWidthStr;
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pub struct Input {
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pub value: Vec<char>,
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pub cursor_position: u16,
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pub cursor_index: usize,
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}
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impl Input {
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pub fn new() -> Self {
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Self {
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value: Vec::new(),
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cursor_index: 0,
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cursor_position: 0,
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}
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}
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pub fn value_str(&self) -> String {
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self.value.iter().collect()
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}
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pub fn reset(&mut self) {
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self.value = Vec::new();
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self.cursor_index = 0;
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self.cursor_position = 0;
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}
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pub fn handle_key(&mut self, key: Key) -> (Option<Key>, bool) {
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let value_str: String = self.value.iter().collect();
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match key {
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Key::Char(c) => {
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self.value.insert(self.cursor_index, c);
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self.cursor_index += 1;
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self.cursor_position += compute_character_width(c);
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return (Some(key), true);
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}
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Key::Delete | Key::Backspace => {
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if value_str.width() > 0 && !self.value.is_empty() && self.cursor_index > 0 {
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let last_c = self.value.remove(self.cursor_index - 1);
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self.cursor_index -= 1;
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self.cursor_position -= compute_character_width(last_c);
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return (Some(key), true);
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}
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return (Some(key), false);
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}
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Key::Left => {
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if !self.value.is_empty() && self.cursor_index > 0 {
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self.cursor_index -= 1;
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self.cursor_position = self
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.cursor_position
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.saturating_sub(compute_character_width(self.value[self.cursor_index]));
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return (Some(key), true);
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}
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return (Some(key), false);
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}
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Key::Right => {
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if self.cursor_index < self.value.len() {
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let next_c = self.value[self.cursor_index];
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self.cursor_index += 1;
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self.cursor_position += compute_character_width(next_c);
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return (Some(key), true);
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}
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return (Some(key), false);
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}
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Key::Ctrl('a') => {
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if !self.value.is_empty() && self.cursor_index > 0 {
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self.cursor_index = 0;
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self.cursor_position = 0;
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return (Some(key), true);
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}
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return (Some(key), false);
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}
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Key::Ctrl('e') => {
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if self.cursor_index < self.value.len() {
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self.cursor_index = self.value.len();
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self.cursor_position = self.value_str().width() as u16;
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return (Some(key), true);
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}
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return (Some(key), false);
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}
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_ => (None, false),
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}
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}
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}
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