// SPDX-License-Identifier: MIT OR Apache-2.0 use cosmic_text::{ Action, Attrs, Color, Family, FontSystem, Metrics, SwashCache, SyntaxEditor, SyntaxSystem, }; use orbclient::{EventOption, Renderer, Window, WindowFlag}; use std::{env, thread, time::{Duration, Instant}}; fn main() { env_logger::init(); let path = if let Some(arg) = env::args().nth(1) { arg.clone() } else { String::new() }; let display_scale = match orbclient::get_display_size() { Ok((w, h)) => { log::info!("Display size: {}, {}", w, h); (h as i32 / 1600) + 1 } Err(err) => { log::warn!("Failed to get display size: {}", err); 1 } }; let mut window = Window::new_flags( -1, -1, 1024 * display_scale as u32, 768 * display_scale as u32, &format!("COSMIC Text - {}", path), &[WindowFlag::Resizable], ) .unwrap(); let font_system = FontSystem::new(); let syntax_system = SyntaxSystem::new(&font_system); let font_sizes = [ Metrics::new(10, 14).scale(display_scale), // Caption Metrics::new(14, 20).scale(display_scale), // Body Metrics::new(20, 28).scale(display_scale), // Title 4 Metrics::new(24, 32).scale(display_scale), // Title 3 Metrics::new(28, 36).scale(display_scale), // Title 2 Metrics::new(32, 44).scale(display_scale), // Title 1 ]; let font_size_default = 1; // Body let mut font_size_i = font_size_default; let line_x = 8 * display_scale; let mut editor = SyntaxEditor::new( &syntax_system, font_sizes[font_size_i], "base16-eighties.dark" ).unwrap(); editor.buffer_mut().set_size( window.width() as i32 - line_x * 2, window.height() as i32 ); let attrs = Attrs::new() .monospaced(true) .family(Family::Monospace); match editor.load_text(&path, attrs) { Ok(()) => (), Err(err) => { log::error!("failed to load {:?}: {}", path, err); } } let mut bg_color = orbclient::Color::rgb(0x00, 0x00, 0x00); let mut font_color = Color::rgb(0xFF, 0xFF, 0xFF); if let Some(background) = editor.theme.settings.background { bg_color = orbclient::Color::rgba( background.r, background.g, background.b, background.a, ); } if let Some(foreground) = editor.theme.settings.foreground { font_color = Color::rgba( foreground.r, foreground.g, foreground.b, foreground.a, ); } let mut swash_cache = SwashCache::new(&font_system); let mut ctrl_pressed = false; let mut mouse_x = -1; let mut mouse_y = -1; let mut mouse_left = false; loop { editor.shape_as_needed(); if editor.buffer_mut().redraw { let instant = Instant::now(); window.set(bg_color); editor.draw(&mut swash_cache, font_color, |x, y, w, h, color| { window.rect(line_x + x, y, w, h, orbclient::Color { data: color.0 }) }); // Draw scrollbar { let mut start_line_opt = None; let mut end_line = 0; for run in editor.buffer().layout_runs() { end_line = run.line_i; if start_line_opt == None { start_line_opt = Some(end_line); } } let start_line = start_line_opt.unwrap_or(end_line); let lines = editor.buffer().lines.len(); let start_y = (start_line * window.height() as usize) / lines; let end_y = (end_line * window.height() as usize) / lines; if end_y > start_y { window.rect( window.width() as i32 - line_x as i32, start_y as i32, line_x as u32, (end_y - start_y) as u32, orbclient::Color::rgba(0xFF, 0xFF, 0xFF, 0x40), ); } } window.sync(); editor.buffer_mut().redraw = false; log::debug!("redraw: {:?}", instant.elapsed()); } let mut found_event = false; let mut force_drag = true; let mut window_async = false; for event in window.events() { found_event = true; match event.to_option() { EventOption::Key(event) => match event.scancode { orbclient::K_CTRL => ctrl_pressed = event.pressed, orbclient::K_LEFT if event.pressed => editor.action(Action::Left), orbclient::K_RIGHT if event.pressed => editor.action(Action::Right), orbclient::K_UP if event.pressed => editor.action(Action::Up), orbclient::K_DOWN if event.pressed => editor.action(Action::Down), orbclient::K_HOME if event.pressed => editor.action(Action::Home), orbclient::K_END if event.pressed => editor.action(Action::End), orbclient::K_PGUP if event.pressed => editor.action(Action::PageUp), orbclient::K_PGDN if event.pressed => editor.action(Action::PageDown), orbclient::K_ENTER if event.pressed => editor.action(Action::Enter), orbclient::K_BKSP if event.pressed => editor.action(Action::Backspace), orbclient::K_DEL if event.pressed => editor.action(Action::Delete), orbclient::K_0 if event.pressed && ctrl_pressed => { font_size_i = font_size_default; editor.buffer_mut().set_metrics(font_sizes[font_size_i]); } orbclient::K_MINUS if event.pressed && ctrl_pressed => { if font_size_i > 0 { font_size_i -= 1; editor.buffer_mut().set_metrics(font_sizes[font_size_i]); } } orbclient::K_EQUALS if event.pressed && ctrl_pressed => { if font_size_i + 1 < font_sizes.len() { font_size_i += 1; editor.buffer_mut().set_metrics(font_sizes[font_size_i]); } } _ => (), }, EventOption::TextInput(event) if !ctrl_pressed => { editor.action(Action::Insert(event.character)); } EventOption::Mouse(event) => { mouse_x = event.x; mouse_y = event.y; if mouse_left { editor.action(Action::Drag { x: mouse_x - line_x, y: mouse_y, }); if mouse_y <= 5 { editor.action(Action::Scroll { lines: -3 }); window_async = true; } else if mouse_y + 5 >= window.height() as i32 { editor.action(Action::Scroll { lines: 3 }); window_async = true; } force_drag = false; } } EventOption::Button(event) => { if event.left != mouse_left { mouse_left = event.left; if mouse_left { editor.action(Action::Click { x: mouse_x - line_x, y: mouse_y, }); } force_drag = false; } } EventOption::Resize(event) => { editor.buffer_mut().set_size(event.width as i32 - line_x * 2, event.height as i32); } EventOption::Scroll(event) => { editor.action(Action::Scroll { lines: -event.y * 3, }); } EventOption::Quit(_) => return, _ => (), } } if mouse_left && force_drag { editor.action(Action::Drag { x: mouse_x - line_x, y: mouse_y, }); if mouse_y <= 5 { editor.action(Action::Scroll { lines: -3 }); window_async = true; } else if mouse_y + 5 >= window.height() as i32 { editor.action(Action::Scroll { lines: 3 }); window_async = true; } } if window_async != window.is_async() { window.set_async(window_async); } if window_async && ! found_event { // In async mode and no event found, sleep thread::sleep(Duration::from_millis(5)); } } }