From 0819d86ae3fe3877b28a40808c5fe7c79416d67c Mon Sep 17 00:00:00 2001
From: James Campos <james.r.campos@gmail.com>
Date: Wed, 22 Apr 2020 19:51:38 -0700
Subject: mouse and resize events
---
src/main.rs | 121 +++++++++++++++++++++++++++++++++++-------------------------
1 file changed, 70 insertions(+), 51 deletions(-)
diff --git a/src/main.rs b/src/main.rs
index 8a31bc7..4c66133 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,7 +4,10 @@ use std::io::{stdout, Error, Read, Write};
use crossterm::{
cursor,
- event::{read, Event, KeyCode, KeyEvent},
+ event::{
+ read, DisableMouseCapture, EnableMouseCapture, Event, KeyCode,
+ MouseEvent,
+ },
queue,
style::{Attribute, Print},
terminal,
@@ -174,57 +177,65 @@ impl Bk {
self.chapter = wrap(chapter, self.cols - (self.pad * 2));
self.chapter_idx = idx;
}
- fn run(&mut self, code: KeyCode) -> bool {
- match code {
- KeyCode::Char('q') => return true,
- KeyCode::Char('p') => {
- if self.chapter_idx > 0 {
- self.get_chapter(self.chapter_idx - 1);
- self.pos = 0;
+ fn scroll_down(&mut self, n: usize) {
+ if self.rows < self.chapter.len() - self.pos {
+ self.pos += n;
+ } else if self.chapter_idx < self.toc.len() - 1 {
+ self.get_chapter(self.chapter_idx + 1);
+ self.pos = 0;
+ }
+ }
+ fn scroll_up(&mut self, n: usize) {
+ if self.pos > 0 {
+ self.pos = self.pos.saturating_sub(n);
+ } else if self.chapter_idx > 0 {
+ self.get_chapter(self.chapter_idx - 1);
+ self.pos = (self.chapter.len() / self.rows) * self.rows;
+ }
+ }
+ fn run(&mut self, event: Event) -> bool {
+ match event {
+ Event::Key(e) => match e.code {
+ KeyCode::Char('q') => return true,
+ KeyCode::Char('p') => {
+ if self.chapter_idx > 0 {
+ self.get_chapter(self.chapter_idx - 1);
+ self.pos = 0;
+ }
}
- }
- KeyCode::Char('n') => {
- if self.chapter_idx < self.toc.len() - 1 {
- self.get_chapter(self.chapter_idx + 1);
- self.pos = 0;
+ KeyCode::Char('n') => {
+ if self.chapter_idx < self.toc.len() - 1 {
+ self.get_chapter(self.chapter_idx + 1);
+ self.pos = 0;
+ }
}
- }
- KeyCode::Up | KeyCode::Char('k') => {
- if self.pos > 0 {
- self.pos -= 1;
- } else if self.chapter_idx > 0 {
- self.get_chapter(self.chapter_idx - 1);
- self.pos = (self.chapter.len() / self.rows) * self.rows;
+ KeyCode::Up | KeyCode::Char('k') => {
+ self.scroll_up(1);
}
- }
- KeyCode::Left | KeyCode::PageUp | KeyCode::Char('h') => {
- if self.pos > 0 {
- self.pos = self.pos.saturating_sub(self.rows);
- } else if self.chapter_idx > 0 {
- self.get_chapter(self.chapter_idx - 1);
- self.pos = (self.chapter.len() / self.rows) * self.rows;
+ KeyCode::Left | KeyCode::PageUp | KeyCode::Char('h') => {
+ self.scroll_up(self.rows);
}
- }
- KeyCode::Down | KeyCode::Char('j') => {
- if self.pos < self.chapter.len() - 1 {
- self.pos += 1;
- } else if self.chapter_idx < self.toc.len() - 1 {
- self.get_chapter(self.chapter_idx + 1);
- self.pos = 0;
+ KeyCode::Down | KeyCode::Char('j') => {
+ self.scroll_down(1);
}
- }
- KeyCode::Right
- | KeyCode::PageDown
- | KeyCode::Char('l')
- | KeyCode::Char(' ') => {
- if self.pos + self.rows < self.chapter.len() {
- self.pos += self.rows;
- } else if self.chapter_idx < self.toc.len() - 1 {
- self.get_chapter(self.chapter_idx + 1);
- self.pos = 0;
+ KeyCode::Right
+ | KeyCode::PageDown
+ | KeyCode::Char('l')
+ | KeyCode::Char(' ') => {
+ self.scroll_down(self.rows);
}
+ _ => (),
+ },
+ Event::Mouse(e) => match e {
+ MouseEvent::ScrollDown(_, _, _) => self.scroll_down(3),
+ MouseEvent::ScrollUp(_, _, _) => self.scroll_up(3),
+ _ => (),
+ },
+ Event::Resize(cols, rows) => {
+ self.cols = cols;
+ self.rows = rows as usize;
+ self.get_chapter(self.chapter_idx);
}
- _ => (),
}
false
}
@@ -293,15 +304,18 @@ fn main() -> crossterm::Result<()> {
});
let mut stdout = stdout();
- queue!(stdout, terminal::EnterAlternateScreen, cursor::Hide)?;
+ queue!(
+ stdout,
+ terminal::EnterAlternateScreen,
+ cursor::Hide,
+ EnableMouseCapture
+ )?;
terminal::enable_raw_mode()?;
loop {
bk.render();
- if let Event::Key(KeyEvent { code, .. }) = read()? {
- if bk.run(code) {
- break;
- }
+ if bk.run(read()?) {
+ break;
}
}
@@ -310,7 +324,12 @@ fn main() -> crossterm::Result<()> {
format!("{}\n{}\n{}", path, bk.chapter_idx, bk.pos),
)
.unwrap();
- queue!(stdout, terminal::LeaveAlternateScreen, cursor::Show)?;
+ queue!(
+ stdout,
+ terminal::LeaveAlternateScreen,
+ cursor::Show,
+ DisableMouseCapture
+ )?;
stdout.flush()?;
terminal::disable_raw_mode()
}
--
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