mirror of https://github.com/TaKO8Ki/gobang
Implement Help component (#32)
* implement help compoment * fix database filter * add column types * fix clippy warnings * help scrolling * panic if type is not implemented yet * not panic but return error * add decimal * add a test for get_text * fix clippy warningspull/36/head
Takayuki Maeda
3 years ago
committed by
GitHub
parent
c768ffd461
commit
3c00d78326
@ -0,0 +1,196 @@
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use super::{Component, DrawableComponent, EventState};
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use crate::components::command::CommandInfo;
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use crate::event::Key;
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use anyhow::Result;
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use itertools::Itertools;
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use std::convert::From;
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use tui::{
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backend::Backend,
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layout::{Alignment, Constraint, Direction, Layout, Rect},
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style::{Color, Modifier, Style},
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text::{Span, Spans},
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widgets::{Block, BorderType, Borders, Clear, Paragraph},
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Frame,
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};
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pub struct HelpComponent {
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cmds: Vec<CommandInfo>,
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visible: bool,
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selection: u16,
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}
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impl DrawableComponent for HelpComponent {
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fn draw<B: Backend>(&mut self, f: &mut Frame<B>, _area: Rect, _focused: bool) -> Result<()> {
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if self.visible {
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const SIZE: (u16, u16) = (65, 24);
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let scroll_threshold = SIZE.1 / 3;
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let scroll = self.selection.saturating_sub(scroll_threshold);
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let area = Rect::new(
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(f.size().width.saturating_sub(SIZE.0)) / 2,
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(f.size().height.saturating_sub(SIZE.1)) / 2,
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SIZE.0.min(f.size().width),
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SIZE.1.min(f.size().height),
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);
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f.render_widget(Clear, area);
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f.render_widget(
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Block::default()
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.title("Help")
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.borders(Borders::ALL)
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.border_type(BorderType::Thick),
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area,
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);
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let chunks = Layout::default()
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.vertical_margin(1)
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.horizontal_margin(1)
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.direction(Direction::Vertical)
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.constraints([Constraint::Min(1), Constraint::Length(1)].as_ref())
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.split(area);
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f.render_widget(
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Paragraph::new(self.get_text(chunks[0].width as usize)).scroll((scroll, 0)),
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chunks[0],
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);
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f.render_widget(
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Paragraph::new(Spans::from(vec![Span::styled(
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format!("gobang {}", "0.1.0"),
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Style::default(),
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)]))
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.alignment(Alignment::Right),
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chunks[1],
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);
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}
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Ok(())
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}
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}
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impl Component for HelpComponent {
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fn commands(&self, out: &mut Vec<CommandInfo>) {}
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fn event(&mut self, key: Key) -> Result<EventState> {
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if self.visible {
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match key {
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Key::Esc => {
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self.hide();
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return Ok(EventState::Consumed);
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}
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Key::Char('j') => {
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self.move_selection(true);
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return Ok(EventState::Consumed);
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}
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Key::Char('k') => {
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self.move_selection(false);
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return Ok(EventState::Consumed);
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}
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_ => (),
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}
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return Ok(EventState::NotConsumed);
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} else if let Key::Char('?') = key {
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self.show()?;
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return Ok(EventState::Consumed);
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}
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Ok(EventState::NotConsumed)
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}
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fn hide(&mut self) {
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self.visible = false;
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}
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fn show(&mut self) -> Result<()> {
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self.visible = true;
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Ok(())
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}
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}
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impl HelpComponent {
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pub const fn new() -> Self {
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Self {
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cmds: vec![],
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visible: false,
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selection: 0,
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}
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}
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pub fn set_cmds(&mut self, cmds: Vec<CommandInfo>) {
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self.cmds = cmds
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.into_iter()
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.filter(|e| !e.text.hide_help)
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.collect::<Vec<_>>();
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}
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fn move_selection(&mut self, inc: bool) {
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let mut new_selection = self.selection;
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new_selection = if inc {
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new_selection.saturating_add(1)
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} else {
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new_selection.saturating_sub(1)
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};
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new_selection = new_selection.max(0);
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self.selection = new_selection.min(self.cmds.len().saturating_sub(1) as u16);
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}
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fn get_text(&self, width: usize) -> Vec<Spans> {
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let mut txt: Vec<Spans> = Vec::new();
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let mut processed = 0;
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for (key, group) in &self.cmds.iter().group_by(|e| e.text.group) {
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txt.push(Spans::from(Span::styled(
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key.to_string(),
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Style::default().add_modifier(Modifier::REVERSED),
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)));
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for command_info in group {
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let is_selected = self.selection == processed;
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processed += 1;
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txt.push(Spans::from(Span::styled(
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format!("{}{:w$}", command_info.text.name, w = width),
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if is_selected {
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Style::default().bg(Color::Blue)
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} else {
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Style::default()
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},
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)));
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}
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}
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txt
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}
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}
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#[cfg(test)]
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mod test {
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use super::{Color, CommandInfo, HelpComponent, Modifier, Span, Spans, Style};
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#[test]
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fn test_get_text() {
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let width = 3;
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let mut component = HelpComponent::new();
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component.set_cmds(vec![
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CommandInfo::new(crate::components::command::move_left("h"), true, true),
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CommandInfo::new(crate::components::command::move_right("l"), true, true),
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]);
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assert_eq!(
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component.get_text(width),
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vec![
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Spans::from(Span::styled(
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"-- General --",
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Style::default().add_modifier(Modifier::REVERSED)
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)),
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Spans::from(Span::styled(
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"Move left [h] 3",
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Style::default().bg(Color::Blue)
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)),
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Spans::from(Span::styled("Move right [l] 3", Style::default()))
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]
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);
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}
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}
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