Enable instant only for wasm32 targets

... and hide the dependency under a `time` module in `iced_native`

Author: hecrj

native/Cargo.toml

@@ -14,7 +14,6 @@ debug = []
 twox-hash = { version = "1.5", default-features = false }
 unicode-segmentation = "1.6"
 num-traits = "0.2"
-instant = { version="0.1", features=["wasm-bindgen"] }
 
 [dependencies.iced_core]
 version = "0.4"
@@ -28,3 +27,7 @@ features = ["thread-pool"]
 [dependencies.iced_style]
 version = "0.3"
 path = "../style"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies.instant]
+version = "0.1"
+features = ["wasm-bindgen"]

native/src/debug/basic.rs

@@ -1,5 +1,7 @@
 #![allow(missing_docs)]
-use std::{collections::VecDeque, time};
+use crate::time;
+
+use std::collections::VecDeque;
 
 /// A bunch of time measurements for debugging purposes.
 #[derive(Debug)]

native/src/lib.rs

@@ -49,6 +49,7 @@ pub mod renderer;
 pub mod subscription;
 pub mod svg;
 pub mod text;
+pub mod time;
 pub mod touch;
 pub mod user_interface;
 pub mod widget;

native/src/mouse/click.rs

@@ -1,6 +1,6 @@
 //! Track mouse clicks.
+use crate::time::Instant;
 use crate::Point;
-use instant::Instant;
 
 /// A mouse click.
 #[derive(Debug, Clone, Copy)]

native/src/time.rs

@@ -0,0 +1,7 @@
+//! Keep track of time, both in native and web platforms!
+
+#[cfg(target_arch = "wasm32")]
+pub use instant::{Duration, Instant};
+
+#[cfg(not(target_arch = "wasm32"))]
+pub use std::time::{Duration, Instant};

src/time.rs

@@ -1,12 +1,12 @@
 //! Listen and react to time.
+pub use crate::runtime::time::{Duration, Instant};
+
 use crate::Subscription;
 
 /// Returns a [`Subscription`] that produces messages at a set interval.
 ///
 /// The first message is produced after a `duration`, and then continues to
 /// produce more messages every `duration` after that.
-pub fn every(
-    duration: std::time::Duration,
-) -> Subscription<std::time::Instant> {
+pub fn every(duration: Duration) -> Subscription<Instant> {
     iced_futures::time::every(duration)
 }