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mod canvas; mod event; mod event_handle; mod media_query_handle; mod scaling; mod timeout; pub use self::canvas::Canvas; pub use self::scaling::ScaleChangeDetector; pub use self::timeout::{AnimationFrameRequest, Timeout}; use crate::dpi::{LogicalSize, Size}; use crate::platform::web::WindowExtWebSys; use crate::window::Window; use wasm_bindgen::closure::Closure; use web_sys::{window, BeforeUnloadEvent, Element, HtmlCanvasElement}; pub fn throw(msg: &str) { wasm_bindgen::throw_str(msg); } pub fn exit_fullscreen() { let window = web_sys::window().expect("Failed to obtain window"); let document = window.document().expect("Failed to obtain document"); document.exit_fullscreen(); } pub struct UnloadEventHandle { _listener: event_handle::EventListenerHandle<dyn FnMut(BeforeUnloadEvent)>, } pub fn on_unload(mut handler: impl FnMut() + 'static) -> UnloadEventHandle { let window = web_sys::window().expect("Failed to obtain window"); let closure = Closure::wrap( Box::new(move |_: BeforeUnloadEvent| handler()) as Box<dyn FnMut(BeforeUnloadEvent)> ); let listener = event_handle::EventListenerHandle::new(&window, "beforeunload", closure); UnloadEventHandle { _listener: listener, } } impl WindowExtWebSys for Window { fn canvas(&self) -> HtmlCanvasElement { self.window.canvas().raw().clone() } fn is_dark_mode(&self) -> bool { let window = web_sys::window().expect("Failed to obtain window"); window .match_media("(prefers-color-scheme: dark)") .ok() .flatten() .map(|media| media.matches()) .unwrap_or(false) } } pub fn window_size() -> LogicalSize<f64> { let window = web_sys::window().expect("Failed to obtain window"); let width = window .inner_width() .expect("Failed to get width") .as_f64() .expect("Failed to get width as f64"); let height = window .inner_height() .expect("Failed to get height") .as_f64() .expect("Failed to get height as f64"); LogicalSize { width, height } } pub fn scale_factor() -> f64 { let window = web_sys::window().expect("Failed to obtain window"); window.device_pixel_ratio() } pub fn set_canvas_size(raw: &HtmlCanvasElement, size: Size) { let scale_factor = scale_factor(); let physical_size = size.to_physical::<u32>(scale_factor); let logical_size = size.to_logical::<f64>(scale_factor); raw.set_width(physical_size.width); raw.set_height(physical_size.height); set_canvas_style_property(raw, "width", &format!("{}px", logical_size.width)); set_canvas_style_property(raw, "height", &format!("{}px", logical_size.height)); } pub fn set_canvas_style_property(raw: &HtmlCanvasElement, property: &str, value: &str) { let style = raw.style(); style .set_property(property, value) .expect(&format!("Failed to set {}", property)); } pub fn is_fullscreen(canvas: &HtmlCanvasElement) -> bool { let window = window().expect("Failed to obtain window"); let document = window.document().expect("Failed to obtain document"); match document.fullscreen_element() { Some(elem) => { let raw: Element = canvas.clone().into(); raw == elem } None => false, } } pub type RawCanvasType = HtmlCanvasElement;