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-rw-r--r--src/main.rs406
1 files changed, 202 insertions, 204 deletions
diff --git a/src/main.rs b/src/main.rs
index c37926b..17cdd37 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -218,15 +218,200 @@ enum Direction {
Backward,
}
-enum Mode {
- Help,
- Nav,
- Read,
- Search,
+trait View {
+ fn run(&self, bk: &mut Bk, kc: KeyCode);
+ fn render(&self, bk: &Bk);
}
-struct Bk {
- mode: Mode,
+struct Help;
+impl View for Help {
+ fn run(&self, bk: &mut Bk, _: KeyCode) {
+ bk.mode = &Page;
+ }
+ fn render(&self, _: &Bk) {
+ let text = r#"
+ Esc q Quit
+ F1 ? Help
+ / Search
+ Tab Table of Contents
+
+PageDown Right Space f l Page Down
+ PageUp Left b h Page Up
+ d Half Page Down
+ u Half Page Up
+ Down j Line Down
+ Up k Line Up
+ Home g Chapter Start
+ End G Chapter End
+ n Search Forward
+ N Search Backward
+ "#;
+
+ let mut stdout = stdout();
+ queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
+ for (i, line) in text.lines().enumerate() {
+ queue!(stdout, cursor::MoveTo(0, i as u16), Print(line)).unwrap();
+ }
+ }
+}
+
+struct Nav;
+impl View for Nav {
+ fn run(&self, bk: &mut Bk, kc: KeyCode) {
+ match kc {
+ KeyCode::Esc | KeyCode::Char('h') | KeyCode::Char('q') => {
+ bk.mode = &Page;
+ }
+ KeyCode::Enter | KeyCode::Tab | KeyCode::Char('l') => {
+ bk.get_chapter(bk.nav_idx);
+ bk.pos = 0;
+ bk.mode = &Page;
+ }
+ KeyCode::Down | KeyCode::Char('j') => {
+ if bk.nav_idx < bk.toc.len() - 1 {
+ bk.nav_idx += 1;
+ if bk.nav_idx == bk.nav_top + bk.rows {
+ bk.nav_top += 1;
+ }
+ }
+ }
+ KeyCode::Up | KeyCode::Char('k') => {
+ if bk.nav_idx > 0 {
+ if bk.nav_idx == bk.nav_top {
+ bk.nav_top -= 1;
+ }
+ bk.nav_idx -= 1;
+ }
+ }
+ KeyCode::Home | KeyCode::Char('g') => {
+ bk.nav_idx = 0;
+ bk.nav_top = 0;
+ }
+ KeyCode::End | KeyCode::Char('G') => {
+ bk.nav_idx = bk.toc.len() - 1;
+ bk.nav_top = bk.toc.len().saturating_sub(bk.rows);
+ }
+ _ => (),
+ }
+ }
+ fn render(&self, bk: &Bk) {
+ let mut stdout = stdout();
+ queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
+
+ let end = std::cmp::min(bk.nav_top + bk.rows, bk.toc.len());
+ for (i, line) in bk.toc[bk.nav_top..end].iter().enumerate() {
+ let s = if bk.nav_idx == bk.nav_top + i {
+ format!(
+ "{}{}{}",
+ Attribute::Reverse,
+ line.0,
+ Attribute::Reset
+ )
+ } else {
+ line.0.to_string()
+ };
+ queue!(stdout, cursor::MoveTo(0, i as u16), Print(s)).unwrap();
+ }
+ }
+}
+
+struct Page;
+impl View for Page {
+ fn run(&self, bk: &mut Bk, kc: KeyCode) {
+ match kc {
+ KeyCode::Esc | KeyCode::Char('q') => bk.run = false,
+ KeyCode::Tab => {
+ bk.nav_idx = bk.chapter_idx;
+ bk.nav_top = bk.nav_idx.saturating_sub(bk.rows - 1);
+ bk.mode = &Nav;
+ }
+ KeyCode::F(1) | KeyCode::Char('?') => bk.mode = &Help,
+ KeyCode::Char('/') => {
+ bk.search = String::new();
+ bk.mode = &Search;
+ }
+ KeyCode::Char('N') => {
+ bk.search(Direction::Backward);
+ }
+ KeyCode::Char('n') => {
+ bk.search(Direction::Forward);
+ }
+ KeyCode::End | KeyCode::Char('G') => {
+ bk.pos = (bk.chapter.len() / bk.rows) * bk.rows;
+ }
+ KeyCode::Home | KeyCode::Char('g') => bk.pos = 0,
+ KeyCode::Char('d') => {
+ bk.scroll_down(bk.rows / 2);
+ }
+ KeyCode::Char('u') => {
+ bk.scroll_up(bk.rows / 2);
+ }
+ KeyCode::Up | KeyCode::Char('k') => {
+ bk.scroll_up(1);
+ }
+ KeyCode::Left
+ | KeyCode::PageUp
+ | KeyCode::Char('b')
+ | KeyCode::Char('h') => {
+ bk.scroll_up(bk.rows);
+ }
+ KeyCode::Down | KeyCode::Char('j') => {
+ bk.scroll_down(1);
+ }
+ KeyCode::Right
+ | KeyCode::PageDown
+ | KeyCode::Char('f')
+ | KeyCode::Char('l')
+ | KeyCode::Char(' ') => {
+ bk.scroll_down(bk.rows);
+ }
+ _ => (),
+ }
+ }
+ fn render(&self, bk: &Bk) {
+ let mut stdout = stdout();
+ queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
+
+ let end = std::cmp::min(bk.pos + bk.rows, bk.chapter.len());
+ for (y, line) in bk.chapter[bk.pos..end].iter().enumerate() {
+ queue!(stdout, cursor::MoveTo(bk.pad, y as u16), Print(line))
+ .unwrap();
+ }
+ }
+}
+
+struct Search;
+impl View for Search {
+ fn run(&self, bk: &mut Bk, kc: KeyCode) {
+ match kc {
+ KeyCode::Esc => {
+ bk.search = String::new();
+ bk.mode = &Page;
+ }
+ KeyCode::Enter => {
+ bk.search(Direction::Forward);
+ bk.mode = &Page;
+ }
+ KeyCode::Char(c) => {
+ bk.search.push(c);
+ }
+ _ => (),
+ }
+ }
+ fn render(&self, bk: &Bk) {
+ let mut stdout = stdout();
+ queue!(
+ stdout,
+ cursor::MoveTo(0, bk.rows as u16),
+ terminal::Clear(ClearType::CurrentLine),
+ Print(&bk.search)
+ )
+ .unwrap();
+ }
+}
+
+struct Bk<'a> {
+ mode: &'a dyn View,
epub: Epub,
cols: u16,
chapter: Vec<String>,
@@ -238,13 +423,15 @@ struct Bk {
toc: Vec<(String, String)>,
pad: u16,
search: String,
+ run: bool,
}
-impl Bk {
+impl Bk<'_> {
fn new(mut epub: Epub, pos: &Position, pad: u16) -> Self {
let (cols, rows) = terminal::size().unwrap();
let mut bk = Bk {
- mode: Mode::Read,
+ run: true,
+ mode: &Page,
chapter: Vec::new(),
chapter_idx: 0,
nav_idx: 0,
@@ -266,28 +453,15 @@ impl Bk {
stdout,
terminal::EnterAlternateScreen,
cursor::Hide,
- //event::EnableMouseCapture
)?;
terminal::enable_raw_mode()?;
- loop {
- match self.mode {
- Mode::Read => self.render_read(),
- Mode::Help => self.render_help(),
- Mode::Nav => self.render_nav(),
- Mode::Search => self.render_search(),
- }
+ while self.run {
+ self.mode.render(self);
+ stdout.flush().unwrap();
+
match event::read()? {
- Event::Key(e) => match self.mode {
- Mode::Read => {
- if self.match_read(e.code) {
- break;
- }
- }
- Mode::Help => self.mode = Mode::Read,
- Mode::Nav => self.match_nav(e.code),
- Mode::Search => self.match_search(e.code),
- },
+ Event::Key(e) => self.mode.run(self, e.code),
Event::Resize(cols, rows) => {
self.cols = cols;
self.rows = rows as usize;
@@ -302,7 +476,6 @@ impl Bk {
stdout,
terminal::LeaveAlternateScreen,
cursor::Show,
- //event::DisableMouseCapture
)?;
//stdout.flush()?;
terminal::disable_raw_mode()
@@ -337,7 +510,7 @@ impl Bk {
self.pos = (self.chapter.len() / self.rows) * self.rows;
}
}
- fn really_search(&mut self, dir: Direction) {
+ fn search(&mut self, dir: Direction) {
match dir {
Direction::Forward => {
if let Some(i) = self.chapter[self.pos + 1..]
@@ -357,181 +530,6 @@ impl Bk {
}
}
}
- fn match_search(&mut self, kc: KeyCode) {
- match kc {
- KeyCode::Esc => {
- self.search = String::new();
- self.mode = Mode::Read;
- }
- KeyCode::Enter => {
- self.mode = Mode::Read;
- self.really_search(Direction::Forward);
- }
- KeyCode::Char(c) => {
- self.search.push(c);
- }
- _ => (),
- }
- }
- fn match_nav(&mut self, kc: KeyCode) {
- match kc {
- KeyCode::Esc | KeyCode::Char('h') | KeyCode::Char('q') => {
- self.mode = Mode::Read
- }
- KeyCode::Enter | KeyCode::Tab | KeyCode::Char('l') => {
- self.get_chapter(self.nav_idx);
- self.pos = 0;
- self.mode = Mode::Read;
- }
- KeyCode::Down | KeyCode::Char('j') => {
- if self.nav_idx < self.toc.len() - 1 {
- self.nav_idx += 1;
- if self.nav_idx == self.nav_top + self.rows {
- self.nav_top += 1;
- }
- }
- }
- KeyCode::Up | KeyCode::Char('k') => {
- if self.nav_idx > 0 {
- if self.nav_idx == self.nav_top {
- self.nav_top -= 1;
- }
- self.nav_idx -= 1;
- }
- }
- KeyCode::Home | KeyCode::Char('g') => {
- self.nav_idx = 0;
- self.nav_top = 0;
- }
- KeyCode::End | KeyCode::Char('G') => {
- self.nav_idx = self.toc.len() - 1;
- self.nav_top = self.toc.len().saturating_sub(self.rows);
- }
- _ => (),
- }
- }
- fn match_read(&mut self, kc: KeyCode) -> bool {
- match kc {
- KeyCode::Esc | KeyCode::Char('q') => return true,
- KeyCode::Tab => self.start_nav(),
- KeyCode::F(1) | KeyCode::Char('?') => self.mode = Mode::Help,
- KeyCode::Char('/') => {
- self.search = String::new();
- self.mode = Mode::Search;
- }
- KeyCode::Char('N') => {
- self.really_search(Direction::Backward);
- }
- KeyCode::Char('n') => {
- self.really_search(Direction::Forward);
- }
- KeyCode::End | KeyCode::Char('G') => {
- self.pos = (self.chapter.len() / self.rows) * self.rows;
- }
- KeyCode::Home | KeyCode::Char('g') => self.pos = 0,
- KeyCode::Char('d') => {
- self.scroll_down(self.rows / 2);
- }
- KeyCode::Char('u') => {
- self.scroll_up(self.rows / 2);
- }
- KeyCode::Up | KeyCode::Char('k') => {
- self.scroll_up(1);
- }
- KeyCode::Left
- | KeyCode::PageUp
- | KeyCode::Char('b')
- | KeyCode::Char('h') => {
- self.scroll_up(self.rows);
- }
- KeyCode::Down | KeyCode::Char('j') => {
- self.scroll_down(1);
- }
- KeyCode::Right
- | KeyCode::PageDown
- | KeyCode::Char('f')
- | KeyCode::Char('l')
- | KeyCode::Char(' ') => {
- self.scroll_down(self.rows);
- }
- _ => (),
- }
- false
- }
- fn render_search(&self) {
- let mut stdout = stdout();
- queue!(
- stdout,
- cursor::MoveTo(0, self.rows as u16),
- terminal::Clear(ClearType::CurrentLine),
- Print(&self.search)
- )
- .unwrap();
- stdout.flush().unwrap();
- }
- fn start_nav(&mut self) {
- self.nav_idx = self.chapter_idx;
- self.nav_top = self.nav_idx.saturating_sub(self.rows - 1);
- self.mode = Mode::Nav;
- }
- fn render_nav(&self) {
- let mut stdout = stdout();
- queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
-
- let end = std::cmp::min(self.nav_top + self.rows, self.toc.len());
- for (i, line) in self.toc[self.nav_top..end].iter().enumerate() {
- let s = if self.nav_idx == self.nav_top + i {
- format!(
- "{}{}{}",
- Attribute::Reverse,
- line.0,
- Attribute::Reset
- )
- } else {
- line.0.to_string()
- };
- queue!(stdout, cursor::MoveTo(0, i as u16), Print(s)).unwrap();
- }
- stdout.flush().unwrap();
- }
- fn render_help(&self) {
- // TODO const?
- let text = r#"
- Esc q Quit
- F1 ? Help
- / Search
- Tab Table of Contents
-
-PageDown Right Space f l Page Down
- PageUp Left b h Page Up
- d Half Page Down
- u Half Page Up
- Down j Line Down
- Up k Line Up
- Home g Chapter Start
- End G Chapter End
- n Search Forward
- N Search Backward
- "#;
-
- let mut stdout = stdout();
- queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
- for (i, line) in text.lines().enumerate() {
- queue!(stdout, cursor::MoveTo(0, i as u16), Print(line)).unwrap();
- }
- stdout.flush().unwrap();
- }
- fn render_read(&self) {
- let mut stdout = stdout();
- queue!(stdout, terminal::Clear(ClearType::All)).unwrap();
-
- let end = std::cmp::min(self.pos + self.rows, self.chapter.len());
- for (y, line) in self.chapter[self.pos..end].iter().enumerate() {
- queue!(stdout, cursor::MoveTo(self.pad, y as u16), Print(line))
- .unwrap();
- }
- stdout.flush().unwrap();
- }
}
fn restore() -> Option<Position> {
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