352 lines
16 KiB
Rust
352 lines
16 KiB
Rust
// SPDX-License-Identifier: MIT OR Apache-2.0
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use cosmic_text::BorrowedWithFontSystem;
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use cosmic_text::CacheKeyFlags;
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use cosmic_text::Color;
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use cosmic_text::Editor;
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use cosmic_text::Shaping;
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use cosmic_text::Style;
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use cosmic_text::{
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Action, Attrs, Buffer, Edit, Family, FontSystem, Metrics, Motion, SwashCache, Weight,
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};
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use std::{num::NonZeroU32, rc::Rc, slice};
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use tiny_skia::{Paint, PixmapMut, Rect, Transform};
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use winit::{
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dpi::PhysicalPosition,
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event::{ElementState, Event, KeyEvent, MouseButton, MouseScrollDelta, WindowEvent},
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event_loop::{ControlFlow, EventLoop},
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keyboard::{Key, NamedKey},
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window::WindowBuilder,
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};
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fn set_buffer_text<'a>(buffer: &mut BorrowedWithFontSystem<'a, Buffer>) {
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let attrs = Attrs::new();
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let serif_attrs = attrs.family(Family::Serif);
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let mono_attrs = attrs.family(Family::Monospace);
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let comic_attrs = attrs.family(Family::Name("Comic Neue"));
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let spans: &[(&str, Attrs)] = &[
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("Font size 64 ", attrs.metrics(Metrics::relative(64.0, 1.2))),
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("Font size 8 ", attrs.metrics(Metrics::relative(8.0, 1.2))),
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("Font size 20 ", attrs.metrics(Metrics::relative(20.0, 1.2))),
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("Font size 14 ", attrs.metrics(Metrics::relative(14.0, 1.2))),
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(
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"Font size 48\n",
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attrs.metrics(Metrics::relative(48.0, 1.2)),
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),
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("B", attrs.weight(Weight::BOLD)),
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("old ", attrs),
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("I", attrs.style(Style::Italic)),
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("talic ", attrs),
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("f", attrs),
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("i ", attrs),
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("f", attrs.weight(Weight::BOLD)),
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("i ", attrs),
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("f", attrs.style(Style::Italic)),
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("i \n", attrs),
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("Sans-Serif Normal ", attrs),
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("Sans-Serif Bold ", attrs.weight(Weight::BOLD)),
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("Sans-Serif Italic ", attrs.style(Style::Italic)),
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(
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"Sans-Serif Fake Italic ",
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attrs.cache_key_flags(CacheKeyFlags::FAKE_ITALIC),
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),
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(
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"Sans-Serif Bold Italic\n",
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attrs.weight(Weight::BOLD).style(Style::Italic),
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),
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("Serif Normal ", serif_attrs),
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("Serif Bold ", serif_attrs.weight(Weight::BOLD)),
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("Serif Italic ", serif_attrs.style(Style::Italic)),
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(
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"Serif Bold Italic\n",
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serif_attrs.weight(Weight::BOLD).style(Style::Italic),
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),
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("Mono Normal ", mono_attrs),
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("Mono Bold ", mono_attrs.weight(Weight::BOLD)),
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("Mono Italic ", mono_attrs.style(Style::Italic)),
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(
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"Mono Bold Italic\n",
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mono_attrs.weight(Weight::BOLD).style(Style::Italic),
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),
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("Comic Normal ", comic_attrs),
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("Comic Bold ", comic_attrs.weight(Weight::BOLD)),
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("Comic Italic ", comic_attrs.style(Style::Italic)),
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(
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"Comic Bold Italic\n",
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comic_attrs.weight(Weight::BOLD).style(Style::Italic),
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),
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("R", attrs.color(Color::rgb(0xFF, 0x00, 0x00))),
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("A", attrs.color(Color::rgb(0xFF, 0x7F, 0x00))),
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("I", attrs.color(Color::rgb(0xFF, 0xFF, 0x00))),
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("N", attrs.color(Color::rgb(0x00, 0xFF, 0x00))),
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("B", attrs.color(Color::rgb(0x00, 0x00, 0xFF))),
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("O", attrs.color(Color::rgb(0x4B, 0x00, 0x82))),
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("W ", attrs.color(Color::rgb(0x94, 0x00, 0xD3))),
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("Red ", attrs.color(Color::rgb(0xFF, 0x00, 0x00))),
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("Orange ", attrs.color(Color::rgb(0xFF, 0x7F, 0x00))),
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("Yellow ", attrs.color(Color::rgb(0xFF, 0xFF, 0x00))),
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("Green ", attrs.color(Color::rgb(0x00, 0xFF, 0x00))),
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("Blue ", attrs.color(Color::rgb(0x00, 0x00, 0xFF))),
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("Indigo ", attrs.color(Color::rgb(0x4B, 0x00, 0x82))),
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("Violet ", attrs.color(Color::rgb(0x94, 0x00, 0xD3))),
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("U", attrs.color(Color::rgb(0x94, 0x00, 0xD3))),
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("N", attrs.color(Color::rgb(0x4B, 0x00, 0x82))),
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("I", attrs.color(Color::rgb(0x00, 0x00, 0xFF))),
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("C", attrs.color(Color::rgb(0x00, 0xFF, 0x00))),
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("O", attrs.color(Color::rgb(0xFF, 0xFF, 0x00))),
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("R", attrs.color(Color::rgb(0xFF, 0x7F, 0x00))),
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("N\n", attrs.color(Color::rgb(0xFF, 0x00, 0x00))),
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(
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"生活,삶,जिंदगी 😀 FPS\n",
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attrs.color(Color::rgb(0xFF, 0x00, 0x00)),
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),
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];
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buffer.set_rich_text(spans.iter().copied(), attrs, Shaping::Advanced, None);
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}
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fn main() {
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env_logger::init();
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let event_loop = EventLoop::new().unwrap();
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let window = Rc::new(WindowBuilder::new().build(&event_loop).unwrap());
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let context = softbuffer::Context::new(window.clone()).unwrap();
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let mut surface = softbuffer::Surface::new(&context, window.clone()).unwrap();
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let mut font_system = FontSystem::new();
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let mut swash_cache = SwashCache::new();
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let mut display_scale = window.scale_factor() as f32;
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let metrics = Metrics::new(32.0, 44.0);
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let mut editor = Editor::new(Buffer::new_empty(metrics.scale(display_scale)));
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let mut editor = editor.borrow_with(&mut font_system);
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editor.with_buffer_mut(|buffer| {
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buffer.set_size(
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Some(window.inner_size().width as f32),
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Some(window.inner_size().height as f32),
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)
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});
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editor.with_buffer_mut(|buffer| set_buffer_text(buffer));
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let mut ctrl_pressed = false;
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let mut mouse_x = 0.0;
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let mut mouse_y = 0.0;
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let mut mouse_left = ElementState::Released;
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let mut unapplied_scroll_delta = 0.0;
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let bg_color = tiny_skia::Color::from_rgba8(0x34, 0x34, 0x34, 0xFF);
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let font_color = Color::rgb(0xFF, 0xFF, 0xFF);
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let cursor_color = Color::rgb(0xFF, 0xFF, 0xFF);
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let selection_color = Color::rgba(0xFF, 0xFF, 0xFF, 0x33);
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let selected_text_color = Color::rgb(0xA0, 0xA0, 0xFF);
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event_loop
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.run(|event, elwt| {
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elwt.set_control_flow(ControlFlow::Wait);
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match event {
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Event::WindowEvent { window_id, event } => {
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match event {
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WindowEvent::ScaleFactorChanged { scale_factor, .. } => {
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log::info!("Updated scale factor for {window_id:?}");
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display_scale = scale_factor as f32;
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editor.with_buffer_mut(|buffer| {
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buffer.set_metrics(metrics.scale(display_scale))
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});
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window.request_redraw();
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}
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WindowEvent::RedrawRequested => {
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let (width, height) = {
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let size = window.inner_size();
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(size.width, size.height)
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};
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surface
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.resize(
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NonZeroU32::new(width).unwrap(),
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NonZeroU32::new(height).unwrap(),
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)
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.unwrap();
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let mut surface_buffer = surface.buffer_mut().unwrap();
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let surface_buffer_u8 = unsafe {
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slice::from_raw_parts_mut(
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surface_buffer.as_mut_ptr() as *mut u8,
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surface_buffer.len() * 4,
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)
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};
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let mut pixmap =
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PixmapMut::from_bytes(surface_buffer_u8, width, height).unwrap();
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pixmap.fill(bg_color);
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editor.with_buffer_mut(|buffer| {
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buffer.set_size(Some(width as f32), Some(height as f32))
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});
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let mut paint = Paint::default();
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paint.anti_alias = false;
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editor.shape_as_needed(true);
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editor.draw(
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&mut swash_cache,
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font_color,
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cursor_color,
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selection_color,
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selected_text_color,
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|x, y, w, h, color| {
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// Note: due to softbuffer and tiny_skia having incompatible internal color representations we swap
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// the red and blue channels here
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paint.set_color_rgba8(
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color.b(),
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color.g(),
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color.r(),
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color.a(),
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);
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pixmap.fill_rect(
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Rect::from_xywh(x as f32, y as f32, w as f32, h as f32)
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.unwrap(),
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&paint,
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Transform::identity(),
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None,
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);
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},
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);
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surface_buffer.present().unwrap();
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}
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WindowEvent::ModifiersChanged(modifiers) => {
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ctrl_pressed = modifiers.state().control_key()
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}
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WindowEvent::KeyboardInput { event, .. } => {
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let KeyEvent {
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logical_key, state, ..
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} = event;
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if state.is_pressed() {
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match logical_key {
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Key::Named(NamedKey::ArrowLeft) => {
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editor.action(Action::Motion(Motion::Left))
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}
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Key::Named(NamedKey::ArrowRight) => {
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editor.action(Action::Motion(Motion::Right))
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}
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Key::Named(NamedKey::ArrowUp) => {
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editor.action(Action::Motion(Motion::Up))
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}
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Key::Named(NamedKey::ArrowDown) => {
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editor.action(Action::Motion(Motion::Down))
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}
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Key::Named(NamedKey::Home) => {
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editor.action(Action::Motion(Motion::Home))
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}
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Key::Named(NamedKey::End) => {
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editor.action(Action::Motion(Motion::End))
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}
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Key::Named(NamedKey::PageUp) => {
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editor.action(Action::Motion(Motion::PageUp))
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}
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Key::Named(NamedKey::PageDown) => {
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editor.action(Action::Motion(Motion::PageDown))
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}
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Key::Named(NamedKey::Escape) => editor.action(Action::Escape),
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Key::Named(NamedKey::Enter) => editor.action(Action::Enter),
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Key::Named(NamedKey::Backspace) => {
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editor.action(Action::Backspace)
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}
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Key::Named(NamedKey::Delete) => editor.action(Action::Delete),
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Key::Named(key) => {
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if let Some(text) = key.to_text() {
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for c in text.chars() {
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editor.action(Action::Insert(c));
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}
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}
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}
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Key::Character(text) => {
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if !ctrl_pressed {
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for c in text.chars() {
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editor.action(Action::Insert(c));
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}
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}
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}
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_ => {}
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}
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window.request_redraw();
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}
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}
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WindowEvent::CursorMoved {
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device_id: _,
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position,
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} => {
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// Update saved mouse position for use when handling click events
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mouse_x = position.x;
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mouse_y = position.y;
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// Implement dragging
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if mouse_left.is_pressed() {
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// Execute Drag editor action (update selection)
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editor.action(Action::Drag {
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x: position.x as i32,
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y: position.y as i32,
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});
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// Scroll if cursor is near edge of window while dragging
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if mouse_y <= 5.0 {
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editor.action(Action::Scroll { lines: -1 });
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} else if mouse_y - 5.0 >= window.inner_size().height as f64 {
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editor.action(Action::Scroll { lines: 1 });
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}
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window.request_redraw();
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}
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}
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WindowEvent::MouseInput {
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device_id: _,
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state,
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button,
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} => {
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if button == MouseButton::Left {
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if state == ElementState::Pressed
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&& mouse_left == ElementState::Released
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{
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editor.action(Action::Click {
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x: mouse_x /*- line_x*/ as i32,
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y: mouse_y as i32,
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});
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window.request_redraw();
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}
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mouse_left = state;
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}
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}
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WindowEvent::MouseWheel {
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device_id: _,
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delta,
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phase: _,
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} => {
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let line_delta = match delta {
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MouseScrollDelta::LineDelta(_x, y) => y as i32,
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MouseScrollDelta::PixelDelta(PhysicalPosition { x: _, y }) => {
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unapplied_scroll_delta += y;
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let line_delta = (unapplied_scroll_delta / 20.0).floor();
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unapplied_scroll_delta -= line_delta * 20.0;
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line_delta as i32
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}
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};
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if line_delta != 0 {
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editor.action(Action::Scroll { lines: -line_delta });
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}
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window.request_redraw();
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}
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WindowEvent::CloseRequested => {
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//TODO: just close one window
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elwt.exit();
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}
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_ => {}
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}
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}
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_ => {}
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}
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})
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.unwrap();
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}
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