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Convert to libcosmic

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This commit is contained in:
Jeremy Soller 2023-12-20 13:31:10 -07:00
parent 75d6da50c0
commit f6118a5cee
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8 changed files with 3965 additions and 870 deletions
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Cargo.lock generated
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31
Cargo.toml
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@ -7,36 +7,19 @@ edition = "2021"
[dependencies]
alacritty_terminal = "0.19"
bytemuck = "1.14"
env_logger = "0.10"
log = "0.4"
tiny-skia = "0.11"
tokio = { version = "1.35", features = ["sync"] }
[dependencies.cosmic-text]
git = "https://github.com/pop-os/cosmic-text.git"
branch = "refactor"
[dependencies.glyphon]
git = "https://github.com/jackpot51/glyphon.git"
branch = "refactor"
optional = true
[dependencies.pollster]
version = "0.3"
optional = true
[dependencies.softbuffer]
git = "https://github.com/pop-os/softbuffer.git"
branch = "cosmic"
[dependencies.wgpu]
version = "0.18"
optional = true
[dependencies.winit]
git = "https://github.com/pop-os/winit.git"
branch = "master"
[dependencies.libcosmic]
git = "https://github.com/pop-os/libcosmic.git"
default-features = false
features = ["tokio", "winit"]
[features]
default = []
wgpu = ["dep:glyphon", "dep:pollster", "dep:wgpu"]
default = ["wgpu"]
wgpu = ["libcosmic/wgpu"]

690
src/main.rs
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@ -1,430 +1,282 @@
use alacritty_terminal::{
ansi::{Color, NamedColor},
config::{Config, PtyConfig},
event::{Event as TermEvent, EventListener, Notify, OnResize, WindowSize},
event_loop::{EventLoop as PtyEventLoop, Notifier},
grid::Dimensions,
index::{Column, Line, Point},
sync::FairMutex,
term::{
cell::Flags,
color::{Colors, Rgb},
// Copyright 2023 System76 <info@system76.com>
// SPDX-License-Identifier: GPL-3.0-only
use alacritty_terminal::event::Event as TermEvent;
use cosmic::{
app::{Command, Core, Settings},
cosmic_theme, executor,
iced::{
self,
futures::SinkExt,
subscription::{self, Subscription},
widget::row,
window, Alignment, Length,
},
tty, Term,
};
use cosmic_text::{
Attrs, AttrsList, Buffer, BufferLine, Family, FontSystem, Metrics, Shaping, Style, SwashCache,
Weight, Wrap,
};
use std::{mem, rc::Rc, sync::Arc, time::Instant};
use winit::{
event::{
ElementState, Event as WinitEvent, KeyboardInput, ModifiersState, VirtualKeyCode,
WindowEvent,
},
event_loop::{ControlFlow, EventLoopBuilder, EventLoopProxy},
window::WindowBuilder,
iced_core::Size,
style,
widget::{self, segmented_button},
ApplicationExt, Element,
};
use std::{any::TypeId, sync::Mutex};
use tokio::sync::mpsc;
use self::renderer::Renderer;
mod renderer;
use self::terminal::Terminal;
mod terminal;
#[derive(Clone, Copy, Debug)]
struct Size {
width: f32,
height: f32,
cell_width: f32,
cell_height: f32,
}
use self::terminal_box::terminal_box;
mod terminal_box;
impl Dimensions for Size {
fn total_lines(&self) -> usize {
self.screen_lines()
}
fn screen_lines(&self) -> usize {
(self.height / self.cell_height).floor() as usize
}
fn columns(&self) -> usize {
(self.width / self.cell_width).floor() as usize
}
}
impl From<Size> for WindowSize {
fn from(size: Size) -> Self {
Self {
num_lines: size.screen_lines() as u16,
num_cols: size.columns() as u16,
cell_width: size.cell_width as u16,
cell_height: size.cell_height as u16,
}
}
}
#[derive(Clone)]
struct EventProxy(EventLoopProxy<TermEvent>);
impl EventListener for EventProxy {
fn send_event(&self, event: TermEvent) {
let _ = self.0.send_event(event);
}
}
fn colors() -> Colors {
let mut colors = Colors::default();
// These colors come from `ransid`: https://gitlab.redox-os.org/redox-os/ransid/-/blob/master/src/color.rs
let encode_rgb = |r: u8, g: u8, b: u8| -> Rgb { Rgb { r, g, b } };
for value in 0..=255 {
let color = match value {
0 => encode_rgb(0x00, 0x00, 0x00),
1 => encode_rgb(0x80, 0x00, 0x00),
2 => encode_rgb(0x00, 0x80, 0x00),
3 => encode_rgb(0x80, 0x80, 0x00),
4 => encode_rgb(0x00, 0x00, 0x80),
5 => encode_rgb(0x80, 0x00, 0x80),
6 => encode_rgb(0x00, 0x80, 0x80),
7 => encode_rgb(0xc0, 0xc0, 0xc0),
8 => encode_rgb(0x80, 0x80, 0x80),
9 => encode_rgb(0xff, 0x00, 0x00),
10 => encode_rgb(0x00, 0xff, 0x00),
11 => encode_rgb(0xff, 0xff, 0x00),
12 => encode_rgb(0x00, 0x00, 0xff),
13 => encode_rgb(0xff, 0x00, 0xff),
14 => encode_rgb(0x00, 0xff, 0xff),
15 => encode_rgb(0xff, 0xff, 0xff),
16..=231 => {
let convert = |value: u8| -> u8 {
match value {
0 => 0,
_ => value * 0x28 + 0x28,
}
};
let r = convert((value - 16) / 36 % 6);
let g = convert((value - 16) / 6 % 6);
let b = convert((value - 16) % 6);
encode_rgb(r, g, b)
}
232..=255 => {
let gray = (value - 232) * 10 + 8;
encode_rgb(gray, gray, gray)
}
};
colors[value as usize] = Some(color);
}
// Set special colors
colors[NamedColor::Foreground] = colors[NamedColor::White];
colors[NamedColor::Background] = colors[NamedColor::Black];
/*TODO
colors[NamedColor::Cursor] = colors[NamedColor::];
colors[NamedColor::DimBlack] = colors[NamedColor::];
colors[NamedColor::DimRed] = colors[NamedColor::];
colors[NamedColor::DimGreen] = colors[NamedColor::];
colors[NamedColor::DimYellow] = colors[NamedColor::];
colors[NamedColor::DimBlue] = colors[NamedColor::];
colors[NamedColor::DimMagenta] = colors[NamedColor::];
colors[NamedColor::DimCyan] = colors[NamedColor::];
colors[NamedColor::DimWhite] = colors[NamedColor::];
*/
colors[NamedColor::BrightForeground] = colors[NamedColor::BrightWhite];
//TODO colors[NamedColor::DimForeground] = colors[NamedColor::];
colors
}
fn main() {
/// Runs application with these settings
#[rustfmt::skip]
fn main() -> Result<(), Box<dyn std::error::Error>> {
env_logger::init();
let mut font_system = FontSystem::new();
let mut swash_cache = SwashCache::new();
let metrics = Metrics::new(14.0, 20.0);
//TODO: set color to default fg
let default_attrs = Attrs::new().family(Family::Monospace);
let mut buffer = Buffer::new_empty(metrics);
buffer.set_wrap(&mut font_system, Wrap::None);
let (cell_width, cell_height) = {
// Use size of space to determine cell size
buffer.set_text(&mut font_system, " ", default_attrs, Shaping::Advanced);
let layout = buffer.line_layout(&mut font_system, 0).unwrap();
(layout[0].w, metrics.line_height)
};
println!("{}, {}", cell_width, cell_height);
let event_loop = EventLoopBuilder::<TermEvent>::with_user_event().build();
let event_loop_proxy = event_loop.create_proxy();
let window = Rc::new(WindowBuilder::new().build(&event_loop).unwrap());
let (width, height) = {
let inner_size = window.inner_size();
(inner_size.width as f32, inner_size.height as f32)
};
let settings = Settings::default()
.antialiasing(true)
.client_decorations(true)
.debug(false)
.default_icon_theme("Pop")
.default_text_size(16.0)
.scale_factor(1.0)
.size(Size::new(1024., 768.))
.theme(cosmic::Theme::dark());
let config = Config::default();
let mut dimensions = Size {
width,
height,
cell_width,
cell_height,
};
let event_proxy = EventProxy(event_loop_proxy);
let term = Arc::new(FairMutex::new(Term::new(
&config,
&dimensions,
event_proxy.clone(),
)));
let colors = colors();
cosmic::app::run::<App>(settings, ())?;
let pty_config = PtyConfig::default();
let window_id = 0;
let pty = tty::new(&pty_config, dimensions.into(), window_id).unwrap();
let pty_event_loop = PtyEventLoop::new(term.clone(), event_proxy, pty, pty_config.hold, false);
let mut notifier = Notifier(pty_event_loop.channel());
let pty_join_handle = pty_event_loop.spawn();
let mut renderer = Renderer::new(window.clone()).unwrap();
let mut modifiers = ModifiersState::default();
event_loop.run(move |event, _elwt, control_flow| {
*control_flow = ControlFlow::Wait;
match event {
WinitEvent::RedrawRequested(window_id) if window_id == window.id() => {
let instant = Instant::now();
renderer.render(&mut buffer, &mut font_system, &mut swash_cache);
println!("draw {:?}", instant.elapsed());
}
WinitEvent::WindowEvent {
event: WindowEvent::ReceivedCharacter(c),
window_id,
} if window_id == window.id() => {
match (modifiers.logo(), modifiers.ctrl(), modifiers.alt()) {
(true, _, _) => {} // Ignore super
(false, _, true) => {
// Alt keys
let mut buf = [0x1B, 0, 0, 0, 0];
let str = c.encode_utf8(&mut buf[1..]);
notifier.notify(str.as_bytes().to_vec());
}
(false, _, false) => {
let mut buf = [0, 0, 0, 0];
let str = c.encode_utf8(&mut buf);
notifier.notify(str.as_bytes().to_vec());
}
}
}
WinitEvent::WindowEvent {
event:
WindowEvent::KeyboardInput {
input:
KeyboardInput {
state: ElementState::Pressed,
virtual_keycode: Some(virtual_keycode),
..
},
..
},
window_id,
} if window_id == window.id() => {
match (modifiers.logo(), modifiers.ctrl(), modifiers.alt()) {
(true, _, _) => {} // Ignore super
(false, true, _) => {
// Control keys will use ReceivedCharacter instead
}
(false, false, true) => {
//TODO: support Alt keys without character
}
(false, false, false) => match virtual_keycode {
VirtualKeyCode::Up => {
notifier.notify(b"\x1B[A".as_slice());
}
VirtualKeyCode::Down => {
notifier.notify(b"\x1B[B".as_slice());
}
VirtualKeyCode::Right => {
notifier.notify(b"\x1B[C".as_slice());
}
VirtualKeyCode::Left => {
notifier.notify(b"\x1B[D".as_slice());
}
VirtualKeyCode::End => {
notifier.notify(b"\x1B[F".as_slice());
}
VirtualKeyCode::Home => {
notifier.notify(b"\x1B[H".as_slice());
}
_ => {}
},
}
}
WinitEvent::WindowEvent {
event: WindowEvent::ModifiersChanged(new_modifiers),
window_id,
} if window_id == window.id() => {
modifiers = new_modifiers;
}
WinitEvent::WindowEvent {
event: WindowEvent::Resized(physical_size),
window_id,
} if window_id == window.id() => {
let instant = Instant::now();
dimensions.width = physical_size.width as f32;
dimensions.height = physical_size.height as f32;
notifier.on_resize(dimensions.into());
term.lock().resize(dimensions);
buffer.set_size(
&mut font_system,
dimensions.width as f32,
dimensions.height as f32,
);
renderer.resize(physical_size.width, physical_size.height);
println!("resize {:?}", instant.elapsed());
}
WinitEvent::WindowEvent {
event: WindowEvent::CloseRequested,
window_id,
} if window_id == window.id() => {
term.lock().exit();
}
WinitEvent::UserEvent(user_event) => {
println!("{:?}", user_event);
match user_event {
//TODO: other error codes?
TermEvent::Exit => *control_flow = ControlFlow::ExitWithCode(0),
TermEvent::PtyWrite(text) => notifier.notify(text.into_bytes()),
TermEvent::Title(title) => {
window.set_title(&title);
}
_ => {}
}
let instant = Instant::now();
//TODO: is redraw needed after all events?
//TODO: use LineDamageBounds
{
let mut last_point = Point::new(Line(0), Column(0));
let mut text = String::new();
let mut attrs_list = AttrsList::new(default_attrs);
let term_guard = term.lock();
let grid = term_guard.grid();
for indexed in grid.display_iter() {
if indexed.point.line != last_point.line {
let line_i = last_point.line.0 as usize;
while line_i >= buffer.lines.len() {
buffer.lines.push(BufferLine::new(
"",
AttrsList::new(default_attrs),
Shaping::Advanced,
));
buffer.set_redraw(true);
}
if buffer.lines[line_i].set_text(text.clone(), attrs_list.clone()) {
buffer.set_redraw(true);
}
text.clear();
attrs_list.clear_spans();
}
//TODO: use indexed.point.column?
//TODO: skip leading spacer?
if indexed.cell.flags.contains(Flags::WIDE_CHAR_SPACER) {
// Skip wide spacers (cells after wide characters)
continue;
}
let start = text.len();
text.push(indexed.cell.c);
if let Some(zerowidth) = indexed.cell.zerowidth() {
for &c in zerowidth {
text.push(c);
}
}
let end = text.len();
let convert_color = |color| {
let rgb = match color {
Color::Named(named_color) => match colors[named_color] {
Some(rgb) => rgb,
None => {
eprintln!("missing named color {:?}", named_color);
Rgb::default()
}
},
Color::Spec(rgb) => rgb,
Color::Indexed(index) => match colors[index as usize] {
Some(rgb) => rgb,
None => {
eprintln!("missing indexed color {}", index);
Rgb::default()
}
},
};
cosmic_text::Color::rgb(rgb.r, rgb.g, rgb.b)
};
let mut attrs = default_attrs;
let mut fg = convert_color(indexed.cell.fg);
let mut bg = convert_color(indexed.cell.bg);
//TODO: better handling of cursor
if indexed.point == grid.cursor.point {
mem::swap(&mut fg, &mut bg);
}
attrs = attrs.color(fg);
// Use metadata as background color
attrs = attrs.metadata(bg.0 as usize);
//TODO: more flags
if indexed.cell.flags.contains(Flags::BOLD) {
attrs = attrs.weight(Weight::BOLD);
}
if indexed.cell.flags.contains(Flags::ITALIC) {
attrs = attrs.style(Style::Italic);
}
if attrs != attrs_list.defaults() {
attrs_list.add_span(start..end, attrs);
}
last_point = indexed.point;
}
//TODO: do not repeat!
let line_i = last_point.line.0 as usize;
while line_i >= buffer.lines.len() {
buffer.lines.push(BufferLine::new(
"",
AttrsList::new(default_attrs),
Shaping::Advanced,
));
buffer.set_redraw(true);
}
if buffer.lines[line_i].set_text(text, attrs_list) {
buffer.set_redraw(true);
}
}
buffer.shape_until_scroll(&mut font_system, true);
if buffer.redraw() {
window.request_redraw();
}
println!("buffer update {:?}", instant.elapsed());
}
_ => {}
}
});
//TODO: hangs after event loop exit pty_join_handle.join().unwrap();
Ok(())
}
/// Messages that are used specifically by our [`App`].
#[derive(Clone, Debug)]
pub enum Message {
TabActivate(segmented_button::Entity),
TabClose(segmented_button::Entity),
TabNew,
TermEvent(segmented_button::Entity, TermEvent),
TermEventTx(mpsc::Sender<(segmented_button::Entity, TermEvent)>),
}
/// The [`App`] stores application-specific state.
pub struct App {
core: Core,
tab_model: segmented_button::Model<segmented_button::SingleSelect>,
term_event_tx_opt: Option<mpsc::Sender<(segmented_button::Entity, TermEvent)>>,
}
/// Implement [`cosmic::Application`] to integrate with COSMIC.
impl cosmic::Application for App {
/// Default async executor to use with the app.
type Executor = executor::Default;
/// Argument received [`cosmic::Application::new`].
type Flags = ();
/// Message type specific to our [`App`].
type Message = Message;
/// The unique application ID to supply to the window manager.
const APP_ID: &'static str = "org.cosmic.AppDemo";
fn core(&self) -> &Core {
&self.core
}
fn core_mut(&mut self) -> &mut Core {
&mut self.core
}
/// Creates the application, and optionally emits command on initialize.
fn init(core: Core, input: Self::Flags) -> (Self, Command<Self::Message>) {
let mut app = App {
core,
tab_model: segmented_button::ModelBuilder::default().build(),
term_event_tx_opt: None,
};
let command = app.update_title();
(app, command)
}
/// Handle application events here.
fn update(&mut self, message: Self::Message) -> Command<Self::Message> {
match message {
Message::TabActivate(entity) => {
self.tab_model.activate(entity);
return self.update_title();
}
Message::TabClose(entity) => {
// Activate closest item
if let Some(position) = self.tab_model.position(entity) {
if position > 0 {
self.tab_model.activate_position(position - 1);
} else {
self.tab_model.activate_position(position + 1);
}
}
// Remove item
self.tab_model.remove(entity);
// If that was the last tab, close window
if self.tab_model.iter().next().is_none() {
return window::close(window::Id::MAIN);
}
return self.update_title();
}
Message::TabNew => match &self.term_event_tx_opt {
Some(term_event_tx) => {
let entity = self
.tab_model
.insert()
.text("New Terminal")
.closable()
.activate()
.id();
let terminal = Terminal::new(entity, term_event_tx.clone());
self.tab_model
.data_set::<Mutex<Terminal>>(entity, Mutex::new(terminal));
}
None => {
log::warn!("tried to create new tab before having event channel");
}
},
Message::TermEvent(entity, event) => match event {
TermEvent::Bell => {
//TODO: audible or visible bell options?
}
TermEvent::ColorRequest(index, f) => {
if let Some(terminal) = self.tab_model.data::<Mutex<Terminal>>(entity) {
let terminal = terminal.lock().unwrap();
let rgb = terminal.colors()[index].unwrap_or_default();
let text = f(rgb);
terminal.input(text.into_bytes());
}
}
TermEvent::Exit => {
return self.update(Message::TabClose(entity));
}
TermEvent::PtyWrite(text) => {
if let Some(terminal) = self.tab_model.data::<Mutex<Terminal>>(entity) {
let terminal = terminal.lock().unwrap();
terminal.input(text.into_bytes());
}
}
TermEvent::ResetTitle => {
self.tab_model.text_set(entity, "New Terminal");
return self.update_title();
}
TermEvent::TextAreaSizeRequest(f) => {
if let Some(terminal) = self.tab_model.data::<Mutex<Terminal>>(entity) {
let terminal = terminal.lock().unwrap();
let text = f(terminal.size().into());
terminal.input(text.into_bytes());
}
}
TermEvent::Title(title) => {
self.tab_model.text_set(entity, title);
return self.update_title();
}
TermEvent::Wakeup => {
if let Some(terminal) = self.tab_model.data::<Mutex<Terminal>>(entity) {
let mut terminal = terminal.lock().unwrap();
terminal.update();
}
}
_ => {
println!("TODO: {:?}", event);
}
},
Message::TermEventTx(term_event_tx) => {
self.term_event_tx_opt = Some(term_event_tx);
}
}
Command::none()
}
/// Creates a view after each update.
fn view(&self) -> Element<Self::Message> {
let cosmic_theme::Spacing { space_xxs, .. } = self.core().system_theme().cosmic().spacing;
let mut tab_column = widget::column::with_capacity(1);
tab_column = tab_column.push(
row![
widget::view_switcher::horizontal(&self.tab_model)
.button_height(32)
.button_spacing(space_xxs)
.on_activate(Message::TabActivate)
.on_close(Message::TabClose)
.width(Length::Shrink),
widget::button(widget::icon::from_name("list-add-symbolic").size(16).icon())
.on_press(Message::TabNew)
.padding(space_xxs)
.style(style::Button::Icon)
]
.align_items(Alignment::Center),
);
match self
.tab_model
.data::<Mutex<Terminal>>(self.tab_model.active())
{
Some(terminal) => {
//TODO
tab_column = tab_column.push(terminal_box(terminal));
}
None => {
//TODO
}
}
let content: Element<_> = tab_column.into();
// Uncomment to debug layout:
//content.explain(cosmic::iced::Color::WHITE)
content
}
fn subscription(&self) -> Subscription<Self::Message> {
struct TerminalEventWorker;
subscription::channel(
TypeId::of::<TerminalEventWorker>(),
100,
|mut output| async move {
let (event_tx, mut event_rx) = mpsc::channel(100);
output.send(Message::TermEventTx(event_tx)).await.unwrap();
// Create first terminal tab
output.send(Message::TabNew).await.unwrap();
while let Some((entity, event)) = event_rx.recv().await {
output
.send(Message::TermEvent(entity, event))
.await
.unwrap();
}
panic!("terminal event channel closed");
},
)
}
}
impl App
where
Self: cosmic::Application,
{
fn update_title(&mut self) -> Command<Message> {
let (header_title, window_title) = match self.tab_model.text(self.tab_model.active()) {
Some(tab_title) => (
tab_title.to_string(),
format!("{tab_title} — COSMIC Terminal"),
),
None => ("No Tab Open".to_string(), "COSMIC Terminal".to_string()),
};
self.set_header_title(header_title);
self.set_window_title(window_title)
}
}

60
src/renderer/mod.rs
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@ -1,60 +0,0 @@
use cosmic_text::{Buffer, FontSystem, SwashCache};
use std::rc::Rc;
use winit::window::Window;
pub use self::software::SoftwareRenderer;
pub mod software;
#[cfg(feature = "wgpu")]
pub use self::wgpu::WgpuRenderer;
#[cfg(feature = "wgpu")]
pub mod wgpu;
pub enum Renderer {
Software(SoftwareRenderer),
#[cfg(feature = "wgpu")]
Wgpu(WgpuRenderer),
}
impl Renderer {
pub fn new(window: Rc<Window>) -> Result<Self, String> {
#[cfg(feature = "wgpu")]
match WgpuRenderer::new(window.clone()) {
Ok(renderer) => return Ok(Self::Wgpu(renderer)),
Err(err) => {
log::error!("failed to use hardware rendering: {}", err);
}
}
SoftwareRenderer::new(window).map(Renderer::Software)
}
pub fn render(
&mut self,
buffer: &mut Buffer,
font_system: &mut FontSystem,
swash_cache: &mut SwashCache,
) {
match self {
Self::Software(renderer) => {
renderer.render(buffer, font_system, swash_cache);
}
#[cfg(feature = "wgpu")]
Self::Wgpu(renderer) => {
renderer.render(buffer, font_system, swash_cache);
}
}
}
pub fn resize(&mut self, width: u32, height: u32) {
match self {
Self::Software(renderer) => {
renderer.resize(width, height);
}
#[cfg(feature = "wgpu")]
Self::Wgpu(renderer) => {
renderer.resize(width, height);
}
}
}
}

141
src/renderer/software.rs
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@ -1,141 +0,0 @@
use cosmic_text::{Buffer, FontSystem, SwashCache, SwashContent};
use std::{rc::Rc, slice};
use tiny_skia::{ColorU8, Paint, Pixmap, PixmapPaint, PixmapRef, Rect, Transform};
use winit::window::Window;
pub struct SoftwareRenderer {
pub window: Rc<Window>,
pub context: softbuffer::GraphicsContext,
}
impl SoftwareRenderer {
pub fn new(window: Rc<Window>) -> Result<Self, String> {
let context = unsafe { softbuffer::GraphicsContext::new(&*window, &*window) }
.map_err(|err| format!("failed to create context: {}", err))?;
Ok(Self { window, context })
}
pub fn render(
&mut self,
buffer: &mut Buffer,
font_system: &mut FontSystem,
swash_cache: &mut SwashCache,
) {
let (width, height) = {
let size = self.window.inner_size();
(size.width, size.height)
};
let mut pixmap = Pixmap::new(width, height).unwrap();
//TODO: configurable background
pixmap.fill(tiny_skia::Color::from_rgba8(0, 0, 0, 0xFF));
let line_height = buffer.metrics().line_height;
let mut paint = Paint::default();
paint.anti_alias = false;
let pixmap_paint = PixmapPaint::default();
let transform = Transform::identity();
for run in buffer.layout_runs() {
for glyph in run.glyphs.iter() {
let physical_glyph = glyph.physical((0., 0.), 1.0);
let glyph_color = match glyph.color_opt {
Some(some) => some,
None => cosmic_text::Color::rgb(0xFF, 0xFF, 0xFF),
};
let background_color = cosmic_text::Color(glyph.metadata as u32);
if background_color.0 != 0xFF000000 {
//TODO: Have to swap RGB for BGR
paint.set_color_rgba8(
background_color.b(),
background_color.g(),
background_color.r(),
background_color.a(),
);
pixmap.fill_rect(
Rect::from_xywh(glyph.x, run.line_top, glyph.w, line_height).unwrap(),
&paint,
transform,
None,
);
}
match swash_cache.get_image(font_system, physical_glyph.cache_key) {
Some(image) if !image.data.is_empty() => {
let mut data = Vec::with_capacity(
(image.placement.width * image.placement.height) as usize,
);
match image.content {
SwashContent::Mask => {
let mut i = 0;
while i < image.data.len() {
//TODO: Have to swap RGB for BGR
data.push(
ColorU8::from_rgba(
glyph_color.b(),
glyph_color.g(),
glyph_color.r(),
image.data[i],
)
.premultiply(),
);
i += 1;
}
}
SwashContent::Color => {
let mut i = 0;
while i < image.data.len() {
//TODO: Have to swap RGB for BGR
data.push(
ColorU8::from_rgba(
image.data[i + 2],
image.data[i + 1],
image.data[i],
image.data[i + 3],
)
.premultiply(),
);
i += 4;
}
}
SwashContent::SubpixelMask => {
todo!("TODO: SubpixelMask");
}
}
let glyph_pixmap = PixmapRef::from_bytes(
unsafe {
slice::from_raw_parts(data.as_ptr() as *const u8, data.len() * 4)
},
image.placement.width,
image.placement.height,
)
.unwrap();
pixmap.draw_pixmap(
physical_glyph.x + image.placement.left,
run.line_y as i32 + physical_glyph.y - image.placement.top,
glyph_pixmap,
&pixmap_paint,
transform,
None,
);
}
_ => {}
}
}
}
buffer.set_redraw(false);
self.context.set_buffer(
bytemuck::cast_slice(pixmap.data()),
width as u16,
height as u16,
);
}
pub fn resize(&mut self, width: u32, height: u32) {
//TODO: resize image here for better performance
self.window.request_redraw();
}
}

145
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@ -1,145 +0,0 @@
use glyphon::{
Attrs, Buffer, Color, Family, FontSystem, Metrics, Resolution, Shaping, SwashCache, TextArea,
TextAtlas, TextBounds, TextRenderer,
};
use std::{error::Error, rc::Rc};
use wgpu::{
CommandEncoderDescriptor, CompositeAlphaMode, Device, DeviceDescriptor, Features, Instance,
InstanceDescriptor, Limits, LoadOp, MultisampleState, Operations, PresentMode, Queue,
RenderPassColorAttachment, RenderPassDescriptor, RequestAdapterOptions, Surface,
SurfaceConfiguration, TextureFormat, TextureUsages, TextureViewDescriptor,
};
use winit::window::Window;
pub struct WgpuRenderer {
pub window: Rc<Window>,
pub device: Device,
pub queue: Queue,
pub surface: Surface,
pub config: SurfaceConfiguration,
pub atlas: TextAtlas,
pub text_renderer: TextRenderer,
}
impl WgpuRenderer {
async fn new_async(window: Rc<Window>) -> Result<Self, String> {
let size = window.inner_size();
let instance = Instance::new(InstanceDescriptor::default());
let adapter = instance
.request_adapter(&RequestAdapterOptions::default())
.await
.ok_or(format!("failed to request adapter"))?;
let (device, queue) = adapter
.request_device(
&DeviceDescriptor {
label: None,
features: Features::empty(),
limits: Limits::downlevel_defaults(),
},
None,
)
.await
.map_err(|err| format!("failed to request device: {}", err))?;
let surface = unsafe { instance.create_surface(&*window) }
.map_err(|err| format!("failed to create surface: {}", err))?;
let swapchain_format = TextureFormat::Bgra8UnormSrgb;
let mut config = SurfaceConfiguration {
usage: TextureUsages::RENDER_ATTACHMENT,
format: swapchain_format,
width: size.width,
height: size.height,
present_mode: PresentMode::Fifo,
alpha_mode: CompositeAlphaMode::Opaque,
view_formats: vec![],
};
surface.configure(&device, &config);
let mut atlas = TextAtlas::new(&device, &queue, swapchain_format);
let mut text_renderer =
TextRenderer::new(&mut atlas, &device, MultisampleState::default(), None);
Ok(Self {
window,
device,
queue,
surface,
config,
atlas,
text_renderer,
})
}
pub fn new(window: Rc<Window>) -> Result<Self, String> {
pollster::block_on(Self::new_async(window))
}
pub fn render(
&mut self,
buffer: &mut Buffer,
font_system: &mut FontSystem,
swash_cache: &mut SwashCache,
) {
self.text_renderer
.prepare(
&self.device,
&self.queue,
font_system,
&mut self.atlas,
Resolution {
width: self.config.width,
height: self.config.height,
},
[TextArea {
buffer: &buffer,
left: 0.0,
top: 0.0,
scale: 1.0,
bounds: TextBounds {
left: 0,
top: 0,
right: self.config.width as i32,
bottom: self.config.height as i32,
},
default_color: Color::rgb(255, 255, 255),
}],
swash_cache,
)
.unwrap();
let frame = self.surface.get_current_texture().unwrap();
let view = frame.texture.create_view(&TextureViewDescriptor::default());
let mut encoder = self
.device
.create_command_encoder(&CommandEncoderDescriptor { label: None });
{
let mut pass = encoder.begin_render_pass(&RenderPassDescriptor {
label: None,
color_attachments: &[Some(RenderPassColorAttachment {
view: &view,
resolve_target: None,
ops: Operations {
load: LoadOp::Clear(wgpu::Color::BLACK),
store: wgpu::StoreOp::Store,
},
})],
depth_stencil_attachment: None,
timestamp_writes: None,
occlusion_query_set: None,
});
self.text_renderer.render(&self.atlas, &mut pass).unwrap();
}
self.queue.submit(Some(encoder.finish()));
frame.present();
self.atlas.trim();
}
pub fn resize(&mut self, width: u32, height: u32) {
self.config.width = width;
self.config.height = height;
self.surface.configure(&self.device, &self.config);
self.window.request_redraw();
}
}

433
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use alacritty_terminal::{
ansi::{Color, NamedColor},
config::{Config, PtyConfig},
event::{Event, EventListener, Notify, OnResize, WindowSize},
event_loop::{EventLoop, Msg, Notifier, State},
grid::Dimensions,
index::{Column, Line, Point},
sync::FairMutex,
term::{
cell::Flags,
color::{Colors, Rgb},
},
tty, Term,
};
use cosmic::{iced::advanced::graphics::text::font_system, widget::segmented_button};
use cosmic_text::{
Attrs, AttrsList, Buffer, BufferLine, Family, FontSystem, Metrics, Shaping, Style, Weight, Wrap,
};
use std::{
borrow::Cow,
mem,
sync::{Arc, Weak},
thread::JoinHandle,
time::Instant,
};
use tokio::sync::mpsc;
#[derive(Clone, Copy, Debug)]
pub struct Size {
width: u32,
height: u32,
cell_width: f32,
cell_height: f32,
}
impl Dimensions for Size {
fn total_lines(&self) -> usize {
self.screen_lines()
}
fn screen_lines(&self) -> usize {
((self.height as f32) / self.cell_height).floor() as usize
}
fn columns(&self) -> usize {
((self.width as f32) / self.cell_width).floor() as usize
}
}
impl From<Size> for WindowSize {
fn from(size: Size) -> Self {
Self {
num_lines: size.screen_lines() as u16,
num_cols: size.columns() as u16,
cell_width: size.cell_width as u16,
cell_height: size.cell_height as u16,
}
}
}
#[derive(Clone)]
struct EventProxy(
segmented_button::Entity,
mpsc::Sender<(segmented_button::Entity, Event)>,
);
impl EventListener for EventProxy {
fn send_event(&self, event: Event) {
//TODO: handle error
let _ = self.1.blocking_send((self.0, event));
}
}
fn colors() -> Colors {
let mut colors = Colors::default();
// These colors come from `ransid`: https://gitlab.redox-os.org/redox-os/ransid/-/blob/master/src/color.rs
let encode_rgb = |r: u8, g: u8, b: u8| -> Rgb { Rgb { r, g, b } };
for value in 0..=255 {
let color = match value {
/* Naive colors
0 => encode_rgb(0x00, 0x00, 0x00),
1 => encode_rgb(0x80, 0x00, 0x00),
2 => encode_rgb(0x00, 0x80, 0x00),
3 => encode_rgb(0x80, 0x80, 0x00),
4 => encode_rgb(0x00, 0x00, 0x80),
5 => encode_rgb(0x80, 0x00, 0x80),
6 => encode_rgb(0x00, 0x80, 0x80),
7 => encode_rgb(0xc0, 0xc0, 0xc0),
8 => encode_rgb(0x80, 0x80, 0x80),
9 => encode_rgb(0xff, 0x00, 0x00),
10 => encode_rgb(0x00, 0xff, 0x00),
11 => encode_rgb(0xff, 0xff, 0x00),
12 => encode_rgb(0x00, 0x00, 0xff),
13 => encode_rgb(0xff, 0x00, 0xff),
14 => encode_rgb(0x00, 0xff, 0xff),
15 => encode_rgb(0xff, 0xff, 0xff),
*/
// Pop colors (from pop-desktop gsettings)
0 => encode_rgb(51, 51, 51),
1 => encode_rgb(204, 0, 0),
2 => encode_rgb(78, 154, 6),
3 => encode_rgb(196, 160, 0),
4 => encode_rgb(52, 101, 164),
5 => encode_rgb(117, 80, 123),
6 => encode_rgb(6, 152, 154),
7 => encode_rgb(211, 215, 207),
8 => encode_rgb(136, 128, 124),
9 => encode_rgb(241, 93, 34),
10 => encode_rgb(115, 196, 143),
11 => encode_rgb(255, 206, 81),
12 => encode_rgb(72, 185, 199),
13 => encode_rgb(173, 127, 168),
14 => encode_rgb(52, 226, 226),
15 => encode_rgb(238, 238, 236),
/* Indexed colors */
16..=231 => {
let convert = |value: u8| -> u8 {
match value {
0 => 0,
_ => value * 0x28 + 0x28,
}
};
let r = convert((value - 16) / 36 % 6);
let g = convert((value - 16) / 6 % 6);
let b = convert((value - 16) % 6);
encode_rgb(r, g, b)
}
232..=255 => {
let gray = (value - 232) * 10 + 8;
encode_rgb(gray, gray, gray)
}
};
colors[value as usize] = Some(color);
}
// Set special colors
// Pop colors (from pop-desktop gsettings)
colors[NamedColor::Foreground] = Some(encode_rgb(242, 242, 242));
colors[NamedColor::Background] = Some(encode_rgb(51, 51, 51));
/*TODO
colors[NamedColor::Cursor] = colors[NamedColor::];
colors[NamedColor::DimBlack] = colors[NamedColor::];
colors[NamedColor::DimRed] = colors[NamedColor::];
colors[NamedColor::DimGreen] = colors[NamedColor::];
colors[NamedColor::DimYellow] = colors[NamedColor::];
colors[NamedColor::DimBlue] = colors[NamedColor::];
colors[NamedColor::DimMagenta] = colors[NamedColor::];
colors[NamedColor::DimCyan] = colors[NamedColor::];
colors[NamedColor::DimWhite] = colors[NamedColor::];
*/
colors[NamedColor::BrightForeground] = colors[NamedColor::BrightWhite];
//TODO colors[NamedColor::DimForeground] = colors[NamedColor::];
colors
}
fn convert_color(colors: &Colors, color: Color) -> cosmic_text::Color {
let rgb = match color {
Color::Named(named_color) => match colors[named_color] {
Some(rgb) => rgb,
None => {
log::warn!("missing named color {:?}", named_color);
Rgb::default()
}
},
Color::Spec(rgb) => rgb,
Color::Indexed(index) => match colors[index as usize] {
Some(rgb) => rgb,
None => {
log::warn!("missing indexed color {}", index);
Rgb::default()
}
},
};
cosmic_text::Color::rgb(rgb.r, rgb.g, rgb.b)
}
pub struct Terminal {
metrics: Metrics,
default_attrs: Attrs<'static>,
buffer: Arc<Buffer>,
size: Size,
term: Arc<FairMutex<Term<EventProxy>>>,
colors: Colors,
notifier: Notifier,
pty_join_handle: JoinHandle<(EventLoop<tty::Pty, EventProxy>, State)>,
}
impl Terminal {
//TODO: error handling
pub fn new(
entity: segmented_button::Entity,
event_tx: mpsc::Sender<(segmented_button::Entity, Event)>,
) -> Self {
let colors = colors();
let metrics = Metrics::new(14.0, 20.0);
//TODO: set color to default fg
let default_attrs = Attrs::new()
.family(Family::Monospace)
.color(convert_color(&colors, Color::Named(NamedColor::Foreground)))
.metadata(convert_color(&colors, Color::Named(NamedColor::Background)).0 as usize);
let mut buffer = Buffer::new_empty(metrics);
let (cell_width, cell_height) = {
let mut font_system = font_system().write().unwrap();
let mut font_system = font_system.raw();
buffer.set_wrap(&mut font_system, Wrap::None);
// Use size of space to determine cell size
buffer.set_text(&mut font_system, " ", default_attrs, Shaping::Advanced);
let layout = buffer.line_layout(&mut font_system, 0).unwrap();
(layout[0].w, metrics.line_height)
};
let config = Config::default();
let mut size = Size {
width: (80.0 * cell_width).ceil() as u32,
height: (24.0 * cell_height).ceil() as u32,
cell_width,
cell_height,
};
let event_proxy = EventProxy(entity, event_tx);
let term = Arc::new(FairMutex::new(Term::new(
&config,
&size,
event_proxy.clone(),
)));
let window_id = 0;
let pty = tty::new(&config.pty_config, size.into(), window_id).unwrap();
let pty_event_loop = EventLoop::new(
term.clone(),
event_proxy,
pty,
config.pty_config.hold,
false,
);
let notifier = Notifier(pty_event_loop.channel());
let pty_join_handle = pty_event_loop.spawn();
Self {
colors,
metrics,
default_attrs,
buffer: Arc::new(buffer),
size,
term,
notifier,
pty_join_handle,
}
}
pub fn buffer_weak(&self) -> Weak<Buffer> {
Arc::downgrade(&self.buffer)
}
/// Get the internal [`Buffer`]
pub fn with_buffer<F: FnOnce(&Buffer) -> T, T>(&self, f: F) -> T {
f(&self.buffer)
}
/// Get the internal [`Buffer`], mutably
pub fn with_buffer_mut<F: FnOnce(&mut Buffer) -> T, T>(&mut self, f: F) -> T {
f(Arc::make_mut(&mut self.buffer))
}
pub fn colors(&self) -> &Colors {
&self.colors
}
pub fn default_attrs(&self) -> &Attrs<'static> {
&self.default_attrs
}
pub fn size(&self) -> Size {
self.size
}
pub fn redraw(&self) -> bool {
self.buffer.redraw()
}
pub fn set_redraw(&mut self, redraw: bool) {
self.with_buffer_mut(|buffer| buffer.set_redraw(redraw));
}
pub fn input<I: Into<Cow<'static, [u8]>>>(&self, input: I) {
self.notifier.notify(input);
}
pub fn resize(&mut self, width: u32, height: u32, scale_factor: f32) {
//TODO: check scale factor
if width != self.size.width || height != self.size.height {
let instant = Instant::now();
self.size.width = width;
self.size.height = height;
self.notifier.on_resize(self.size.into());
self.term.lock().resize(self.size);
let metrics = self.metrics.scale(scale_factor);
self.with_buffer_mut(|buffer| {
let mut font_system = font_system().write().unwrap();
buffer.set_metrics_and_size(
font_system.raw(),
metrics,
(width as f32) * scale_factor,
(height as f32) * scale_factor,
);
});
log::debug!("resize {:?}", instant.elapsed());
}
}
pub fn update(&mut self) -> bool {
let instant = Instant::now();
//TODO: is redraw needed after all events?
//TODO: use LineDamageBounds
{
let mut buffer = Arc::make_mut(&mut self.buffer);
let mut last_point = Point::new(Line(0), Column(0));
let mut text = String::new();
let mut attrs_list = AttrsList::new(self.default_attrs);
{
let term_guard = self.term.lock();
let grid = term_guard.grid();
for indexed in grid.display_iter() {
if indexed.point.line != last_point.line {
let line_i = last_point.line.0 as usize;
while line_i >= buffer.lines.len() {
buffer.lines.push(BufferLine::new(
"",
AttrsList::new(self.default_attrs),
Shaping::Advanced,
));
buffer.set_redraw(true);
}
if buffer.lines[line_i].set_text(text.clone(), attrs_list.clone()) {
buffer.set_redraw(true);
}
text.clear();
attrs_list.clear_spans();
}
//TODO: use indexed.point.column?
//TODO: skip leading spacer?
if indexed.cell.flags.contains(Flags::WIDE_CHAR_SPACER) {
// Skip wide spacers (cells after wide characters)
continue;
}
let start = text.len();
text.push(indexed.cell.c);
if let Some(zerowidth) = indexed.cell.zerowidth() {
for &c in zerowidth {
text.push(c);
}
}
let end = text.len();
let mut attrs = self.default_attrs;
let mut fg = convert_color(&self.colors, indexed.cell.fg);
let mut bg = convert_color(&self.colors, indexed.cell.bg);
//TODO: better handling of cursor
if indexed.point == grid.cursor.point {
mem::swap(&mut fg, &mut bg);
}
attrs = attrs.color(fg);
// Use metadata as background color
attrs = attrs.metadata(bg.0 as usize);
//TODO: more flags
if indexed.cell.flags.contains(Flags::BOLD) {
attrs = attrs.weight(Weight::BOLD);
}
if indexed.cell.flags.contains(Flags::ITALIC) {
attrs = attrs.style(Style::Italic);
}
if attrs != attrs_list.defaults() {
attrs_list.add_span(start..end, attrs);
}
last_point = indexed.point;
}
}
//TODO: do not repeat!
let line_i = last_point.line.0 as usize;
while line_i >= buffer.lines.len() {
buffer.lines.push(BufferLine::new(
"",
AttrsList::new(self.default_attrs),
Shaping::Advanced,
));
buffer.set_redraw(true);
}
if buffer.lines[line_i].set_text(text, attrs_list) {
buffer.set_redraw(true);
}
if buffer.lines.len() != line_i + 1 {
buffer.lines.truncate(line_i + 1);
buffer.set_redraw(true);
}
{
let mut font_system = font_system().write().unwrap();
buffer.shape_until_scroll(font_system.raw(), true);
}
}
log::debug!("buffer update {:?}", instant.elapsed());
self.buffer.redraw()
}
}
impl Drop for Terminal {
fn drop(&mut self) {
// Ensure shutdown on terminal drop
let _ = self.notifier.0.send(Msg::Shutdown);
}
}

617
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// SPDX-License-Identifier: GPL-3.0-only
use cosmic::{
iced::{
advanced::graphics::text::{font_system, Raw},
event::{Event, Status},
keyboard::{Event as KeyEvent, KeyCode, Modifiers},
mouse::{self, Button, Event as MouseEvent, ScrollDelta},
Color, Element, Length, Padding, Point, Rectangle, Size, Vector,
},
iced_core::{
clipboard::Clipboard,
image,
layout::{self, Layout},
renderer::{self, Quad},
text,
widget::{self, tree, Widget},
Shell,
},
};
use cosmic_text::{Action, Edit, Metrics, Motion, Scroll};
use std::{
cell::Cell,
cmp,
sync::Mutex,
time::{Duration, Instant},
};
use crate::Terminal;
pub struct TerminalBox<'a, Message> {
terminal: &'a Mutex<Terminal>,
padding: Padding,
click_timing: Duration,
context_menu: Option<Point>,
on_context_menu: Option<Box<dyn Fn(Option<Point>) -> Message + 'a>>,
}
impl<'a, Message> TerminalBox<'a, Message>
where
Message: Clone,
{
pub fn new(terminal: &'a Mutex<Terminal>) -> Self {
Self {
terminal,
padding: Padding::new(0.0),
click_timing: Duration::from_millis(500),
context_menu: None,
on_context_menu: None,
}
}
pub fn padding<P: Into<Padding>>(mut self, padding: P) -> Self {
self.padding = padding.into();
self
}
pub fn click_timing(mut self, click_timing: Duration) -> Self {
self.click_timing = click_timing;
self
}
pub fn context_menu(mut self, position: Point) -> Self {
self.context_menu = Some(position);
self
}
pub fn on_context_menu(
mut self,
on_context_menu: impl Fn(Option<Point>) -> Message + 'a,
) -> Self {
self.on_context_menu = Some(Box::new(on_context_menu));
self
}
}
pub fn terminal_box<'a, Message>(terminal: &'a Mutex<Terminal>) -> TerminalBox<'a, Message>
where
Message: Clone,
{
TerminalBox::new(terminal)
}
impl<'a, Message, Renderer> Widget<Message, Renderer> for TerminalBox<'a, Message>
where
Message: Clone,
Renderer:
renderer::Renderer + image::Renderer<Handle = image::Handle> + text::Renderer<Raw = Raw>,
{
fn tag(&self) -> tree::Tag {
tree::Tag::of::<State>()
}
fn state(&self) -> tree::State {
tree::State::new(State::new())
}
fn width(&self) -> Length {
Length::Fill
}
fn height(&self) -> Length {
Length::Fill
}
fn layout(
&self,
_tree: &mut widget::Tree,
_renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
let limits = limits.width(Length::Fill).height(Length::Fill);
let mut terminal = self.terminal.lock().unwrap();
//TODO: set size?
terminal.with_buffer_mut(|buffer| {
let mut font_system = font_system().write().unwrap();
buffer.shape_until_scroll(font_system.raw(), true);
});
terminal.with_buffer(|buffer| {
let mut layout_lines = 0;
for line in buffer.lines.iter() {
match line.layout_opt() {
Some(layout) => layout_lines += layout.len(),
None => (),
}
}
let height = layout_lines as f32 * buffer.metrics().line_height;
let size = Size::new(limits.max().width, height);
layout::Node::new(limits.resolve(size))
})
}
fn mouse_interaction(
&self,
tree: &widget::Tree,
layout: Layout<'_>,
cursor_position: mouse::Cursor,
_viewport: &Rectangle,
_renderer: &Renderer,
) -> mouse::Interaction {
let state = tree.state.downcast_ref::<State>();
match &state.dragging {
Some(Dragging::Scrollbar { .. }) => return mouse::Interaction::Idle,
_ => {}
}
if let Some(p) = cursor_position.position_in(layout.bounds()) {
let scale_factor = state.scale_factor.get();
let terminal = self.terminal.lock().unwrap();
let buffer_size = terminal.with_buffer(|buffer| buffer.size());
let x_logical = p.x - self.padding.left;
let y_logical = p.y - self.padding.top;
let x = x_logical * scale_factor;
let y = y_logical * scale_factor;
if x >= 0.0 && x < buffer_size.0 && y >= 0.0 && y < buffer_size.1 {
return mouse::Interaction::Text;
}
}
mouse::Interaction::Idle
}
fn draw(
&self,
tree: &widget::Tree,
renderer: &mut Renderer,
_theme: &Renderer::Theme,
style: &renderer::Style,
layout: Layout<'_>,
_cursor_position: mouse::Cursor,
viewport: &Rectangle,
) {
let instant = Instant::now();
let state = tree.state.downcast_ref::<State>();
let mut terminal = self.terminal.lock().unwrap();
//TODO: make this configurable
let scrollbar_w = 0.0;
let view_position =
layout.position() + [self.padding.left as f32, self.padding.top as f32].into();
let view_w = cmp::min(viewport.width as i32, layout.bounds().width as i32)
- self.padding.horizontal() as i32;
let view_h = cmp::min(viewport.height as i32, layout.bounds().height as i32)
- self.padding.vertical() as i32
- scrollbar_w as i32;
let scale_factor = style.scale_factor as f32;
if view_w <= 0 || view_h <= 0 {
// Zero sized image
return;
}
// Ensure terminal is the right size
terminal.resize(view_w as u32, view_h as u32, scale_factor);
// Cache scale factor
state.scale_factor.set(scale_factor);
// Ensure terminal is shaped
terminal.with_buffer_mut(|buffer| {
let mut font_system = font_system().write().unwrap();
buffer.shape_until_scroll(font_system.raw(), true);
});
// Render default background
{
let background_color = cosmic_text::Color(terminal.default_attrs().metadata as u32);
renderer.fill_quad(
Quad {
bounds: Rectangle::new(view_position, Size::new(view_w as f32, view_h as f32)),
border_radius: 0.0.into(),
border_width: 0.0,
border_color: Color::TRANSPARENT,
},
Color::new(
background_color.r() as f32 / 255.0,
background_color.g() as f32 / 255.0,
background_color.b() as f32 / 255.0,
background_color.a() as f32 / 255.0,
),
);
}
// Render cell backgrounds that do not match default
terminal.with_buffer(|buffer| {
let line_height = buffer.metrics().line_height;
for run in buffer.layout_runs() {
for glyph in run.glyphs.iter() {
if glyph.metadata != terminal.default_attrs().metadata {
let background_color = cosmic_text::Color(glyph.metadata as u32);
renderer.fill_quad(
Quad {
bounds: Rectangle::new(
view_position + Vector::new(glyph.x, run.line_top),
Size::new(glyph.w, line_height),
),
border_radius: 0.0.into(),
border_width: 0.0,
border_color: Color::TRANSPARENT,
},
Color::new(
background_color.r() as f32 / 255.0,
background_color.g() as f32 / 255.0,
background_color.b() as f32 / 255.0,
background_color.a() as f32 / 255.0,
),
);
}
}
}
});
renderer.fill_raw(Raw {
buffer: terminal.buffer_weak(),
position: view_position,
color: Color::new(1.0, 1.0, 1.0, 1.0), // TODO
clip_bounds: Rectangle::new(view_position, Size::new(view_w as f32, view_h as f32)),
});
/*TODO
// Draw scrollbar
let scrollbar_alpha = match &state.dragging {
Some(Dragging::Scrollbar { .. }) => 0.5,
_ => 0.25,
};
renderer.fill_quad(
Quad {
bounds: state.scrollbar_rect.get() + Vector::new(view_position.x, view_position.y),
border_radius: 0.0.into(),
border_width: 0.0,
border_color: Color::TRANSPARENT,
},
Color::new(1.0, 1.0, 1.0, scrollbar_alpha),
);
*/
let duration = instant.elapsed();
log::debug!("redraw {}, {}: {:?}", view_w, view_h, duration);
}
fn on_event(
&mut self,
tree: &mut widget::Tree,
event: Event,
layout: Layout<'_>,
cursor_position: mouse::Cursor,
_renderer: &Renderer,
_clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Message>,
_viewport: &Rectangle<f32>,
) -> Status {
let state = tree.state.downcast_mut::<State>();
let scale_factor = state.scale_factor.get();
let scrollbar_rect = state.scrollbar_rect.get();
let mut terminal = self.terminal.lock().unwrap();
let buffer_size = terminal.with_buffer(|buffer| buffer.size());
let mut font_system = font_system().write().unwrap();
let mut status = Status::Ignored;
match event {
//TODO: Alt keys when they are control characters
Event::Keyboard(KeyEvent::KeyPressed {
key_code,
modifiers,
}) => match key_code {
KeyCode::Backspace => {
terminal.input(b"\x08".as_slice());
status = Status::Captured;
}
KeyCode::Tab => {
if modifiers.shift() {
terminal.input(b"\x1B[Z".as_slice());
} else {
terminal.input(b"\t".as_slice());
}
status = Status::Captured;
}
KeyCode::Enter => {
terminal.input(b"\n".as_slice());
status = Status::Captured;
}
KeyCode::Escape => {
terminal.input(b"\x1B".as_slice());
status = Status::Captured;
}
KeyCode::Up => {
terminal.input(b"\x1B[A".as_slice());
status = Status::Captured;
}
KeyCode::Down => {
terminal.input(b"\x1B[B".as_slice());
status = Status::Captured;
}
KeyCode::Right => {
terminal.input(b"\x1B[C".as_slice());
status = Status::Captured;
}
KeyCode::Left => {
terminal.input(b"\x1B[D".as_slice());
status = Status::Captured;
}
KeyCode::End => {
terminal.input(b"\x1B[F".as_slice());
status = Status::Captured;
}
KeyCode::Home => {
terminal.input(b"\x1B[H".as_slice());
status = Status::Captured;
}
KeyCode::Insert => {
terminal.input(b"\x1B[2~".as_slice());
status = Status::Captured;
}
KeyCode::Delete => {
terminal.input(b"\x1B[3~".as_slice());
status = Status::Captured;
}
KeyCode::PageUp => {
terminal.input(b"\x1B[5~".as_slice());
status = Status::Captured;
}
KeyCode::PageDown => {
terminal.input(b"\x1B[6~".as_slice());
status = Status::Captured;
}
//TODO: F1-F12 keys
_ => (),
},
Event::Keyboard(KeyEvent::ModifiersChanged(modifiers)) => {
state.modifiers = modifiers;
}
Event::Keyboard(KeyEvent::CharacterReceived(character)) => {
match (
state.modifiers.logo(),
state.modifiers.control(),
state.modifiers.alt(),
) {
(true, _, _) => {
// Ignore super
}
(false, true, _) => {
// Handle ctrl for control characters (Ctrl-A to Ctrl-Z)
if character.is_control() {
let mut buf = [0, 0, 0, 0];
let str = character.encode_utf8(&mut buf);
terminal.input(str.as_bytes().to_vec());
}
}
(false, false, true) => {
if !character.is_control() {
// Handle alt for non-control characters
let mut buf = [0x1B, 0, 0, 0, 0];
let str = character.encode_utf8(&mut buf[1..]);
terminal.input(str.as_bytes().to_vec());
}
}
(false, false, false) => {
// Handle no modifiers for non-control characters
if !character.is_control() {
let mut buf = [0, 0, 0, 0];
let str = character.encode_utf8(&mut buf);
terminal.input(str.as_bytes().to_vec());
}
}
}
status = Status::Captured;
}
/*TODO
Event::Mouse(MouseEvent::ButtonPressed(button)) => {
if let Some(p) = cursor_position.position_in(layout.bounds()) {
// Handle left click drag
if let Button::Left = button {
let x_logical = p.x - self.padding.left;
let y_logical = p.y - self.padding.top;
let x = x_logical * scale_factor;
let y = y_logical * scale_factor;
if x >= 0.0 && x < buffer_size.0 && y >= 0.0 && y < buffer_size.1 {
let click_kind =
if let Some((click_kind, click_time)) = state.click.take() {
if click_time.elapsed() < self.click_timing {
match click_kind {
ClickKind::Single => ClickKind::Double,
ClickKind::Double => ClickKind::Triple,
ClickKind::Triple => ClickKind::Single,
}
} else {
ClickKind::Single
}
} else {
ClickKind::Single
};
match click_kind {
ClickKind::Single => editor.action(Action::Click {
x: x as i32,
y: y as i32,
}),
ClickKind::Double => editor.action(Action::DoubleClick {
x: x as i32,
y: y as i32,
}),
ClickKind::Triple => editor.action(Action::TripleClick {
x: x as i32,
y: y as i32,
}),
}
state.click = Some((click_kind, Instant::now()));
state.dragging = Some(Dragging::Buffer);
} else if scrollbar_rect.contains(Point::new(x_logical, y_logical)) {
state.dragging = Some(Dragging::Scrollbar {
start_y: y,
start_scroll: editor.with_buffer(|buffer| buffer.scroll()),
});
} else if x_logical >= scrollbar_rect.x
&& x_logical < (scrollbar_rect.x + scrollbar_rect.width)
{
editor.with_buffer_mut(|buffer| {
let scroll_line =
((y / buffer.size().1) * buffer.lines.len() as f32) as i32;
buffer.set_scroll(Scroll::new(
scroll_line.try_into().unwrap_or_default(),
0,
));
state.dragging = Some(Dragging::Scrollbar {
start_y: y,
start_scroll: buffer.scroll(),
});
});
}
}
// Update context menu state
if let Some(on_context_menu) = &self.on_context_menu {
shell.publish((on_context_menu)(match self.context_menu {
Some(_) => None,
None => match button {
Button::Right => Some(p),
_ => None,
},
}));
}
status = Status::Captured;
}
}
Event::Mouse(MouseEvent::ButtonReleased(Button::Left)) => {
state.dragging = None;
status = Status::Captured;
}
Event::Mouse(MouseEvent::CursorMoved { .. }) => {
if let Some(dragging) = &state.dragging {
if let Some(p) = cursor_position.position() {
let x_logical = (p.x - layout.bounds().x) - self.padding.left;
let y_logical = (p.y - layout.bounds().y) - self.padding.top;
let x = x_logical * scale_factor;
let y = y_logical * scale_factor;
match dragging {
Dragging::Buffer => {
editor.action(Action::Drag {
x: x as i32,
y: y as i32,
});
}
Dragging::Scrollbar {
start_y,
start_scroll,
} => {
editor.with_buffer_mut(|buffer| {
let scroll_offset = (((y - start_y) / buffer.size().1)
* buffer.lines.len() as f32)
as i32;
buffer.set_scroll(Scroll::new(
(start_scroll.line as i32 + scroll_offset)
.try_into()
.unwrap_or_default(),
0,
));
});
}
}
}
status = Status::Captured;
}
}
Event::Mouse(MouseEvent::WheelScrolled { delta }) => {
if let Some(_p) = cursor_position.position_in(layout.bounds()) {
match delta {
ScrollDelta::Lines { x, y } => {
//TODO: this adjustment is just a guess!
state.scroll_pixels = 0.0;
let lines = (-y * 6.0) as i32;
if lines != 0 {
editor.action(Action::Scroll { lines });
}
status = Status::Captured;
}
ScrollDelta::Pixels { x, y } => {
//TODO: this adjustment is just a guess!
state.scroll_pixels -= y * 6.0;
let mut lines = 0;
let metrics = editor.with_buffer(|buffer| buffer.metrics());
while state.scroll_pixels <= -metrics.line_height {
lines -= 1;
state.scroll_pixels += metrics.line_height;
}
while state.scroll_pixels >= metrics.line_height {
lines += 1;
state.scroll_pixels -= metrics.line_height;
}
if lines != 0 {
editor.action(Action::Scroll { lines });
}
status = Status::Captured;
}
}
}
}
*/
_ => (),
}
status
}
}
impl<'a, Message, Renderer> From<TerminalBox<'a, Message>> for Element<'a, Message, Renderer>
where
Message: Clone + 'a,
Renderer:
renderer::Renderer + image::Renderer<Handle = image::Handle> + text::Renderer<Raw = Raw>,
{
fn from(terminal_box: TerminalBox<'a, Message>) -> Self {
Self::new(terminal_box)
}
}
enum ClickKind {
Single,
Double,
Triple,
}
enum Dragging {
Buffer,
Scrollbar { start_y: f32, start_scroll: Scroll },
}
pub struct State {
modifiers: Modifiers,
click: Option<(ClickKind, Instant)>,
dragging: Option<Dragging>,
scale_factor: Cell<f32>,
scroll_pixels: f32,
scrollbar_rect: Cell<Rectangle<f32>>,
}
impl State {
/// Creates a new [`State`].
pub fn new() -> State {
State {
modifiers: Modifiers::empty(),
click: None,
dragging: None,
scale_factor: Cell::new(1.0),
scroll_pixels: 0.0,
scrollbar_rect: Cell::new(Rectangle::default()),
}
}
}