diff options
Diffstat (limited to 'tests/fakes/fake_output.rs')
| -rw-r--r-- | tests/fakes/fake_output.rs | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/tests/fakes/fake_output.rs b/tests/fakes/fake_output.rs new file mode 100644 index 0000000..4714bad --- /dev/null +++ b/tests/fakes/fake_output.rs @@ -0,0 +1,263 @@ +// mostly copied and adjusted from https://github.com/fdehau/tui-rs/blob/master/src/backend/termion.rs + +use std::fmt; +use std::io; + +use ::std::sync::{Arc, Mutex}; + +use ::tui::backend::Backend; +use ::tui::buffer::Cell; +use ::tui::layout::Rect; +use ::tui::style; + +#[derive(Hash, Debug, PartialEq)] +pub enum TerminalEvent { + Clear, + HideCursor, + ShowCursor, + GetCursor, + Flush, + Draw +} + +pub struct TestBackend { + pub events: Arc<Mutex<Vec<TerminalEvent>>>, + pub draw_events: Arc<Mutex<Vec<String>>> +} + +impl TestBackend { + pub fn new(log: Arc<Mutex<Vec<TerminalEvent>>>, draw_log: Arc<Mutex<Vec<String>>>) -> TestBackend { + TestBackend { events: log, draw_events: draw_log } + } +} + +impl Backend for TestBackend { + + /// Clears the entire screen and move the cursor to the top left of the screen + fn clear(&mut self) -> io::Result<()> { + self.events.lock().unwrap().push(TerminalEvent::Clear); + Ok(()) + } + + /// Hides cursor + fn hide_cursor(&mut self) -> io::Result<()> { + self.events.lock().unwrap().push(TerminalEvent::HideCursor); + Ok(()) + } + + /// Shows cursor + fn show_cursor(&mut self) -> io::Result<()> { + self.events.lock().unwrap().push(TerminalEvent::ShowCursor); + Ok(()) + } + + /// Gets cursor position (0-based index) + fn get_cursor(&mut self) -> io::Result<(u16, u16)> { + self.events.lock().unwrap().push(TerminalEvent::GetCursor); + Ok((0, 0)) + } + + /// Sets cursor position (0-based index) + fn set_cursor(&mut self, _x: u16, _y: u16) -> io::Result<()> { + Ok(()) + } + + fn draw<'a, I>(&mut self, content: I) -> io::Result<()> + where + I: Iterator<Item = (u16, u16, &'a Cell)>, + { + use std::fmt::Write; + self.events.lock().unwrap().push(TerminalEvent::Draw); + + let mut string = String::with_capacity(content.size_hint().0 * 3); + let mut style = style::Style::default(); + let mut last_y = 0; + let mut last_x = 0; + let mut inst = 0; + for (x, y, cell) in content { + if y != last_y || x != last_x + 1 || inst == 0 { + write!(string, "{}", termion::cursor::Goto(x + 1, y + 1)).unwrap(); + inst += 1; + } + last_x = x; + last_y = y; + if cell.style.modifier != style.modifier { + write!( + string, + "{}", + ModifierDiff { + from: style.modifier, + to: cell.style.modifier + } + ) + .unwrap(); + style.modifier = cell.style.modifier; + inst += 1; + } + if cell.style.fg != style.fg { + write!(string, "{}", Fg(cell.style.fg)).unwrap(); + style.fg = cell.style.fg; + inst += 1; + } + if cell.style.bg != style.bg { + write!(string, "{}", Bg(cell.style.bg)).unwrap(); + style.bg = cell.style.bg; + inst += 1; + } + string.push_str(&cell.symbol); + inst += 1; + } + self.draw_events.lock().unwrap().push(string.clone()); + // uncomment this to print to screen + // + // write!(self.stdout, "{}", termion::clear::All)?; + // write!( + // self.stdout, + // "{}{}{}{}", + // string, + // Fg(style::Color::Reset), + // Bg(style::Color::Reset), + // termion::style::Reset, + // ); + Ok(()) + } + + /// Return the size of the terminal + fn size(&self) -> io::Result<Rect> { + Ok(Rect::new(0, 0, 190, 50)) + } + + fn flush(&mut self) -> io::Result<()> { + self.events.lock().unwrap().push(TerminalEvent::Flush); + Ok(()) + } +} + +struct Fg(style::Color); + +struct Bg(style::Color); + +struct ModifierDiff { + from: style::Modifier, + to: style::Modifier, +} + +impl fmt::Display for Fg { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + use termion::color::Color; + match self.0 { + style::Color::Reset => termion::color::Reset.write_fg(f), + style::Color::Black => termion::color::Black.write_fg(f), + style::Color::Red => termion::color::Red.write_fg(f), + style::Color::Green => termion::color::Green.write_fg(f), + style::Color::Yellow => termion::color::Yellow.write_fg(f), + style::Color::Blue => termion::color::Blue.write_fg(f), + style::Color::Magenta => termion::color::Magenta.write_fg(f), + style::Color::Cyan => termion::color::Cyan.write_fg(f), + style::Color::Gray => termion::color::White.write_fg(f), + style::Color::DarkGray => termion::color::LightBlack.write_fg(f), + style::Color::LightRed => termion::color::LightRed.write_fg(f), + style::Color::LightGreen => termion::color::LightGreen.write_fg(f), + style::Color::LightBlue => termion::color::LightBlue.write_fg(f), + style::Color::LightYellow => termion::color::LightYellow.write_fg(f), + style::Color::LightMagenta => termion::color::LightMagenta.write_fg(f), + style::Color::LightCyan => termion::color::LightCyan.write_fg(f), + style::Color::White => termion::color::LightWhite.write_fg(f), + style::Color::Indexed(i) => termion::color::AnsiValue(i).write_fg(f), + style::Color::Rgb(r, g, b) => termion::color::Rgb(r, g, b).write_fg(f), + } + } +} +impl fmt::Display for Bg { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + use termion::color::Color; + match self.0 { + style::Color::Reset => termion::color::Reset.write_bg(f), + style::Color::Black => termion::color::Black.write_bg(f), + style::Color::Red => termion::color::Red.write_bg(f), + style::Color::Green => termion::color::Green.write_bg(f), + style::Color::Yellow => termion::color::Yellow.write_bg(f), + style::Color::Blue => termion::color::Blue.write_bg(f), + style::Color::Magenta => termion::color::Magenta.write_bg(f), + style::Color::Cyan => termion::color::Cyan.write_bg(f), + style::Color::Gray => termion::color::White.write_bg(f), + style::Color::DarkGray => termion::color::LightBlack.write_bg(f), + style::Color::LightRed => termion::color::LightRed.write_bg(f), + style::Color::LightGreen => termion::color::LightGreen.write_bg(f), + style::Color::LightBlue => termion::color::LightBlue.write_bg(f), + style::Color::LightYellow => termion::color::LightYellow.write_bg(f), + style::Color::LightMagenta => termion::color::LightMagenta.write_bg(f), + style::Color::LightCyan => termion::color::LightCyan.write_bg(f), + style::Color::White => termion::color::LightWhite.write_bg(f), + style::Color::Indexed(i) => termion::color::AnsiValue(i).write_bg(f), + style::Color::Rgb(r, g, b) => termion::color::Rgb(r, g, b).write_bg(f), + } + } +} + +impl fmt::Display for ModifierDiff { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + let remove = self.from - self.to; + if remove.contains(style::Modifier::REVERSED) { + write!(f, "{}", termion::style::NoInvert)?; + } + if remove.contains(style::Modifier::BOLD) { + // XXX: the termion NoBold flag actually enables double-underline on ECMA-48 compliant + // terminals, and NoFaint additionally disables bold... so we use this trick to get + // the right semantics. + write!(f, "{}", termion::style::NoFaint)?; + + if self.to.contains(style::Modifier::DIM) { + write!(f, "{}", termion::style::Faint)?; + } + } + if remove.contains(style::Modifier::ITALIC) { + write!(f, "{}", termion::style::NoItalic)?; + } + if remove.contains(style::Modifier::UNDERLINED) { + write!(f, "{}", termion::style::NoUnderline)?; + } + if remove.contains(style::Modifier::DIM) { + write!(f, "{}", termion::style::NoFaint)?; + + // XXX: the NoFaint flag additionally disables bold as well, so we need to re-enable it + // here if we want it. + if self.to.contains(style::Modifier::BOLD) { + write!(f, "{}", termion::style::Bold)?; + } + } + if remove.contains(style::Modifier::CROSSED_OUT) { + write!(f, "{}", termion::style::NoCrossedOut)?; + } + if remove.contains(style::Modifier::SLOW_BLINK) + || remove.contains(style::Modifier::RAPID_BLINK) + { + write!(f, "{}", termion::style::NoBlink)?; + } + + let add = self.to - self.from; + if add.contains(style::Modifier::REVERSED) { + write!(f, "{}", termion::style::Invert)?; + } + if add.contains(style::Modifier::BOLD) { + write!(f, "{}", termion::style::Bold)?; + } + if add.contains(style::Modifier::ITALIC) { + write!(f, "{}", termion::style::Italic)?; + } + if add.contains(style::Modifier::UNDERLINED) { + write!(f, "{}", termion::style::Underline)?; + } + if add.contains(style::Modifier::DIM) { + write!(f, "{}", termion::style::Faint)?; + } + if add.contains(style::Modifier::CROSSED_OUT) { + write!(f, "{}", termion::style::CrossedOut)?; + } + if add.contains(style::Modifier::SLOW_BLINK) || add.contains(style::Modifier::RAPID_BLINK) { + write!(f, "{}", termion::style::Blink)?; + } + + Ok(()) + } +} |