363 lines
8.8 KiB
Rust
363 lines
8.8 KiB
Rust
use iced::Space;
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use iced_native::text_input::Value;
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use core::ops::RangeInclusive;
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use core::time::Duration;
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use iced::Row;
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use iced::Text;
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use iced::Container;
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use iced::Length;
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use iced::Element;
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use crate::styles::{Theme, FONT_VG5000};
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use crate::app::Message;
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use iced::widget::text_input::{self, TextInput};
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use iced::widget::scrollable::{self, Scrollable};
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use iced::Align;
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use iced_native::widget::text_input::cursor::State;
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum LyricEvent {
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LyricChanged(String),
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TimestampChanged(String),
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LineAdvanced,
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}
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impl LyricEvent {
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fn into_msg(self, line_no: usize) -> Message {
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Message::LyricEvent {
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kind: self,
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line_no,
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}
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}
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}
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pub struct Lyrics {
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lines: Vec<Lyric>,
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scroll_state: scrollable::State,
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}
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impl Lyrics {
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pub fn new() -> Lyrics {
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let mut lyric = Lyric::new();
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lyric.select();
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Self {
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lines: vec![lyric],
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scroll_state: scrollable::State::new(),
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}
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}
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pub fn insert_text(&mut self, text: String) {
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let mut pieces = text.trim_end()
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.split('\n')
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.map(str::trim);
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let (line_no, current_line) = self.current_line_mut();
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current_line.deselect();
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current_line.value.push_str(pieces.next().unwrap());
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let pieces = pieces
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.collect::<Vec<_>>()
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.into_iter()
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.map(str::to_owned)
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.map(Lyric::new_with_value);
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let n_pieces = pieces.size_hint().0;
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self.lines.splice((line_no + 1)..(line_no + 1), pieces);
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self.lines[line_no + n_pieces].select();
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}
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pub fn handle_event(&mut self, line_no: usize, kind: LyricEvent) {
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match kind {
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LyricEvent::LyricChanged(newval) => {
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self.update_line(newval, line_no)
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},
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LyricEvent::TimestampChanged(newval) => {
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self.lines[line_no].timestamp_update(newval)
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},
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LyricEvent::LineAdvanced => {
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self.advance_line(line_no)
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},
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}
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}
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pub fn update_line(&mut self, new_content: String, line_no: usize) {
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self.lines[line_no].value = new_content;
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}
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pub fn advance_line(&mut self, current_line: usize) {
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let new_line = current_line + 1;
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let line = if new_line == self.lines.len() {
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self.insert_line(new_line, None)
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} else {
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self.lines.get_mut(new_line)
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.expect("Unexpected .advance_line with index beyond # of lines")
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};
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line.select();
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self.lines.get_mut(current_line)
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.unwrap()
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.deselect();
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}
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pub fn insert_line(&mut self, index: usize, content: Option<String>) -> &mut Lyric {
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self.lines.insert(index, match content {
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Some(content) => Lyric::new_with_value(content),
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None => Lyric::new(),
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});
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self.lines.get_mut(index).unwrap()
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}
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pub fn current_line_mut(&mut self) -> (usize, &mut Lyric) {
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self.lines
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.iter_mut()
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.enumerate()
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.find(|(_, l)| l.is_selected())
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.expect("no line currently selected")
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}
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pub fn view(&mut self, theme: Theme) -> Element<Message> {
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let is_sole_line = self.lines.len() == 1;
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let spacers = (
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Space::new(Length::Fill, Length::Units(30)),
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Space::new(Length::Fill, Length::Units(30)),
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);
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let scroller = self.lines.iter_mut()
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.enumerate()
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.map(|(i, l)| l.view(is_sole_line, i, theme))
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.fold(Scrollable::new(&mut self.scroll_state).push(spacers.0), |s, l| s.push(l))
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.push(spacers.1)
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.width(Length::Fill)
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.align_items(Align::Center);
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Container::new(scroller)
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.height(Length::Fill)
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.width(Length::Fill)
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.center_y()
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.into()
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}
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}
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#[derive(Clone, Debug)]
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pub struct Lyric {
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main_state: text_input::State,
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timestamp_state: text_input::State,
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pub value: String,
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pub timestamp: Duration,
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timestamp_raw: String,
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}
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impl Lyric {
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pub fn new() -> Self {
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Self::new_with_value(String::with_capacity(70))
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}
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pub fn new_with_value(val: String) -> Self {
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Lyric {
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main_state: text_input::State::new(),
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timestamp_state: text_input::State::new(),
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timestamp: Duration::ZERO,
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timestamp_raw: String::from("0:00.000"),
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value: val,
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}
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}
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pub fn view(&mut self, show_placeholder: bool, line_no: usize, theme: Theme) -> Element<Message> {
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const SMALL_SIZE: u16 = 20;
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const LARGE_SIZE: u16 = 25;
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const TIMESTAMP_W: u16 = 67;
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const LINE_HEIGHT: u16 = 26;
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const TOTAL_W: u16 = 400;
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let is_focused = self.is_selected();
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let placeholder = if show_placeholder {
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"Paste some lyrics to get started"
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} else if is_focused {
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"..."
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} else { "" };
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let size = if is_focused { LARGE_SIZE } else { SMALL_SIZE };
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let timestamp_input = TextInput::new(
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&mut self.timestamp_state,
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"",
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&self.timestamp_raw,
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move|new_value| LyricEvent::TimestampChanged(new_value).into_msg(line_no),
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)
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.style(theme)
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.size(SMALL_SIZE)
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.width(Length::Units(TIMESTAMP_W))
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.on_submit(LyricEvent::LineAdvanced.into_msg(line_no))
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.font(FONT_VG5000)
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.into();
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let text_input = TextInput::new(
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&mut self.main_state,
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placeholder,
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&self.value,
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move|new_value| LyricEvent::LyricChanged(new_value).into_msg(line_no),
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)
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.style(theme.active_lyric(is_focused))
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.size(size)
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.width(Length::Fill)
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.on_submit(LyricEvent::LineAdvanced.into_msg(line_no))
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.font(FONT_VG5000)
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.into();
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let l_bracket = Text::new("[")
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.size(SMALL_SIZE)
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.color(theme.reduced_text_color())
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.font(FONT_VG5000)
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.into();
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let r_bracket = Text::new("] ")
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.size(SMALL_SIZE)
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.color(theme.reduced_text_color())
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.font(FONT_VG5000)
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.into();
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Row::with_children(vec![l_bracket, timestamp_input, r_bracket, text_input])
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.width(Length::Units(TOTAL_W))
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.height(Length::Units(LINE_HEIGHT))
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.align_items(Align::Center)
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.into()
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}
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pub fn select(&mut self) {
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self.main_state.focus();
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self.main_state.move_cursor_to_end();
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}
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pub fn is_selected(&self) -> bool {
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self.main_state.is_focused() || self.timestamp_state.is_focused()
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}
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pub fn deselect(&mut self) {
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self.main_state.unfocus();
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self.timestamp_state.unfocus();
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}
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pub (crate) fn timestamp_update(&mut self, newval: String) {
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if let Some((shift, validated)) = Self::clean_timestamp(newval) {
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self.timestamp = dbg!(Self::parse_validated_timestamp(&validated));
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self.timestamp_raw = validated;
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if shift != 0 {
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self.timestamp_state.move_cursor_to(
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match self.timestamp_state.cursor().state(&Value::new(&self.timestamp_raw)) {
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State::Index(p) => ((p as isize) + shift) as usize,
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State::Selection { start, ..} => {
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// Should be impossible, but lets handle it anyway
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((start as isize) + shift) as usize
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},
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}
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);
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}
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}
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}
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fn clean_timestamp(mut raw: String) -> Option<(isize, String)> {
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// Rules:
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// - [R0] Must have exactly 1 colon (:)
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// - [R1] Must have exactly 1 period (.)
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// - [R2] The period must follow the colon
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// - [R3] No characters outside 0-9, colon, and period
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// - [R4] Unnecessary leading zeros besides normal padding are trimmed
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// - [R5] Each section is padded to the appropriate length (reversed for millis)
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const VALID_CHARS: RangeInclusive<char> = '0'..=':';
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const MIN_DIGIT_COUNTS: [usize; 3] = [1, 2, 3];
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let mut colon_count = 0;
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let mut period_count = 0;
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let mut digit_counts = [0; 3];
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for c in raw.chars() {
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match c {
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':' => {
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colon_count += 1;
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if colon_count > 1 {
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return None; // Rejected [R0]
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}
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},
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'.' => {
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period_count += 1;
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if colon_count == 0 /* [R2] */ || period_count > 1 /* [R1] */ {
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return None; // Rejected
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}
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},
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_ if VALID_CHARS.contains(&c) || c == '.' => {
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let section = colon_count + period_count;
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digit_counts[section] += 1;
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},
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_ => {
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return None; // Rejected [R3]
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}
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}
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}
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if period_count == 0 {
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return None; //Rejected [R1]
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}
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let mut i = 0;
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let mut cursor_shift = 0;
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for section in 0..3 {
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while digit_counts[section] < MIN_DIGIT_COUNTS[section] {
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// [R5]
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if section == 2 {
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raw.push('0');
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} else {
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raw.insert(i, '0');
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cursor_shift += 1;
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}
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digit_counts[section] += 1;
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}
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while
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digit_counts[section] > MIN_DIGIT_COUNTS[section]
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&& if section == 2 {
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raw.ends_with('0')
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} else {
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raw.chars().nth(i).unwrap() == '0'
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}
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{
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// [R4]
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if section == 2 {
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raw.truncate(raw.len() - 1);
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} else {
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raw.remove(i);
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cursor_shift -= 1;
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}
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digit_counts[section] -= 1;
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}
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i += digit_counts[section] + 1;
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}
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Some((cursor_shift, raw))
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}
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fn parse_validated_timestamp(s: &str) -> Duration {
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let (minutes, s) = s.split_at(s.find(':').expect(
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"parse_validated_timestamp received a timestamp without a :"
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));
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let (seconds, millis) = s.split_at(s.find('.').expect(
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"parse_validated_timestamp received a timestamp without a . after the :"
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));
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let minutes: u64 = minutes.parse()
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.expect("parse_validated_timestamp received an invalid number of minutes");
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let seconds: u64 = seconds[1..].parse()
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.expect("parse_validated_timestamp received an invalid number of seconds");
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let millis: u32 = millis[1..4].parse()
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.expect("parse_validated_timestamp received an invalid number of millis");
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Duration::new(seconds + minutes * 60, millis * 1_000_000)
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}
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}
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