252 lines
7.7 KiB
Rust
252 lines
7.7 KiB
Rust
// Copyright (c) 2022 Marceline Cramer
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// SPDX-License-Identifier: AGPL-3.0-or-later
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use std::collections::HashMap;
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use std::path::PathBuf;
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use std::time::Instant;
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use canary::{CursorEventKind, Panel, Runtime, Vec2, PX_PER_MM};
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use glium::backend::glutin::DisplayCreationError;
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use glium::{glutin, Surface};
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use glutin::event::{ElementState, Event, MouseButton, WindowEvent};
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use glutin::event_loop::{ControlFlow, EventLoop, EventLoopProxy, EventLoopWindowTarget};
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use glutin::window::WindowId;
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use crate::service::gl::Graphics;
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use crate::service::ipc::{IpcMessage, IpcMessageSender};
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#[derive(Clone, Debug)]
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pub enum WindowMessage {
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OpenWindow {
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id: usize,
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protocol: String,
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script: PathBuf,
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},
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CloseWindow {
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id: usize,
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},
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Quit,
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SendMessage {
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id: usize,
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msg: Vec<u8>,
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},
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}
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pub type WindowMessageSender = EventLoopProxy<WindowMessage>;
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pub struct Window {
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pub ipc_sender: IpcMessageSender,
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pub ipc_id: usize,
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pub graphics: Graphics,
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pub panel: Panel,
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pub last_update: Instant,
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pub cursor_pos: Vec2,
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pub cursor_down: bool,
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}
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impl Window {
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pub fn new(
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ipc_sender: IpcMessageSender,
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ipc_id: usize,
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panel: Panel,
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event_loop: &EventLoopWindowTarget<WindowMessage>,
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) -> Result<Self, DisplayCreationError> {
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let wb = glutin::window::WindowBuilder::new()
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.with_transparent(true)
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.with_decorations(false);
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let cb = glutin::ContextBuilder::new()
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.with_vsync(true)
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.with_multisampling(4);
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let display = glium::Display::new(wb, cb, &event_loop)?;
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let graphics = Graphics::new(display);
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let last_update = Instant::now();
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Ok(Self {
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ipc_sender,
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ipc_id,
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graphics,
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panel,
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last_update,
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cursor_pos: Vec2::ZERO,
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cursor_down: false,
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})
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}
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pub fn get_id(&self) -> WindowId {
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self.graphics.display.gl_window().window().id()
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}
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pub fn request_redraw(&mut self) {
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self.graphics.display.gl_window().window().request_redraw();
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}
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/// Receives all messages from the script and forwards them to IPC.
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pub fn recv_messages(&mut self) {
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for message in self.panel.recv_messages() {
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self.ipc_sender.send(IpcMessage::PanelMessage {
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window: self.ipc_id,
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message,
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});
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}
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}
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pub fn update(&mut self) {
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let now = Instant::now();
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let dt = now.duration_since(self.last_update).as_secs_f32();
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self.panel.update(dt);
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self.last_update = now;
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self.recv_messages();
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}
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pub fn draw(&mut self) {
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let commands = self.panel.draw();
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self.graphics.draw(&commands);
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self.recv_messages();
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}
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pub fn send_message(&mut self, msg: Vec<u8>) {
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self.panel.on_message(msg);
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self.recv_messages();
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}
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pub fn resize(&mut self, new_size: Vec2) {
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self.panel.on_resize(new_size);
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self.recv_messages();
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}
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pub fn on_event(&mut self, event: WindowEvent) {
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match event {
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WindowEvent::Resized(size) => {
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self.resize(Vec2::new(size.width as f32, size.height as f32) * PX_PER_MM);
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self.request_redraw()
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}
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WindowEvent::CursorMoved { position, .. } => {
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let x = position.x as f32 * PX_PER_MM;
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let y = position.y as f32 * PX_PER_MM;
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self.cursor_pos = Vec2::new(x, y);
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let event = if self.cursor_down {
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CursorEventKind::Drag
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} else {
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CursorEventKind::Hover
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};
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self.panel.on_cursor_event(event, self.cursor_pos);
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self.recv_messages();
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}
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WindowEvent::MouseInput {
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state,
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button: MouseButton::Left,
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..
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} => {
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let event = match state {
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ElementState::Pressed => {
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self.cursor_down = true;
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CursorEventKind::Select
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}
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ElementState::Released => {
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self.cursor_down = false;
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CursorEventKind::Deselect
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}
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};
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self.panel.on_cursor_event(event, self.cursor_pos);
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self.recv_messages();
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}
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_ => {}
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}
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}
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}
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pub struct WindowStore {
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pub ipc_sender: IpcMessageSender,
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pub ipc_to_window: HashMap<usize, WindowId>,
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pub windows: HashMap<WindowId, Window>,
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pub runtime: Runtime,
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}
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impl WindowStore {
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pub fn new(ipc_sender: IpcMessageSender) -> Self {
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let backend = canary::backend::make_default_backend().unwrap();
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let runtime = Runtime::new(backend).unwrap();
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Self {
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ipc_sender,
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ipc_to_window: Default::default(),
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windows: Default::default(),
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runtime,
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}
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}
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pub fn get_ipc_window(&mut self, id: usize) -> Option<&mut Window> {
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self.ipc_to_window
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.get(&id)
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.map(|id| self.windows.get_mut(id))
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.flatten()
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}
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pub fn on_message(
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&mut self,
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event_loop: &EventLoopWindowTarget<WindowMessage>,
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message: WindowMessage,
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) -> anyhow::Result<bool> {
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match message {
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WindowMessage::OpenWindow {
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id,
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protocol,
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script,
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} => {
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println!("Opening window {} with script {:?}", id, script);
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let module = std::fs::read(script)?;
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let mut script = self.runtime.load_module(&module)?;
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let panel = script.create_panel(&protocol, vec![])?;
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let window = Window::new(self.ipc_sender.to_owned(), id, panel, &event_loop)?;
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let window_id = window.get_id();
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self.windows.insert(window_id, window);
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self.ipc_to_window.insert(id, window_id);
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}
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WindowMessage::CloseWindow { id } => {
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if let Some(window_id) = self.ipc_to_window.remove(&id) {
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self.windows.remove(&window_id);
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}
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}
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WindowMessage::Quit => return Ok(true),
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WindowMessage::SendMessage { id, msg } => {
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if let Some(window) = self.get_ipc_window(id) {
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window.send_message(msg);
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}
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}
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};
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Ok(false)
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}
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pub fn run(mut self, event_loop: EventLoop<WindowMessage>) -> ! {
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event_loop.run(move |event, event_loop, control_flow| match event {
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Event::WindowEvent { window_id, event } => {
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if let Some(window) = self.windows.get_mut(&window_id) {
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window.on_event(event);
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}
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}
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Event::RedrawRequested(id) => {
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if let Some(window) = self.windows.get_mut(&id) {
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window.draw();
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}
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}
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Event::MainEventsCleared => {
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for (_id, window) in self.windows.iter_mut() {
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window.update();
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window.request_redraw();
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}
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}
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Event::UserEvent(event) => match self.on_message(event_loop, event.clone()) {
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Ok(false) => {}
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Ok(true) => *control_flow = ControlFlow::Exit,
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Err(err) => {
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eprintln!("Error while handling message {:?}:\n{}", event, err);
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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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