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