Use instant over std::time, for wasm compat (#449)

Replace std::time with the `instant` crate, which bridges to std::time on
native but on wasm calls performance.now() instead of panicking.

A step towards 🕸️ Web support #446

* logo: replace SystemTime/UNIX_EPOCH with Instant

Cargo.lock

@@ -2277,6 +2277,7 @@ dependencies = [
  "cfb8",
  "flate2",
  "hex",
+ "instant",
  "log",
  "num-traits",
  "reqwest",
@@ -2310,6 +2311,7 @@ dependencies = [
  "glow",
  "glutin",
  "image",
+ "instant",
  "lazy_static",
  "log",
  "rand 0.7.3",

Cargo.toml

@@ -38,6 +38,7 @@ collision = "0.20.1"
 rsa_public_encrypt_pkcs1 = "0.2.0"
 structopt = "0.3.21"
 clipboard = "0.5.0"
+instant = "0.1.9"
 # clippy = "*"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]

protocol/Cargo.lock

@@ -432,6 +432,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -960,6 +969,7 @@ dependencies = [
  "cfb8",
  "flate2",
  "hex",
+ "instant",
  "log",
  "num-traits",
  "reqwest",

protocol/Cargo.toml

@@ -15,6 +15,7 @@ byteorder = "1.3.4"
 log = { version = "0.4.11", features = ["std"] }
 flate2 = { version = "1.0.19", features = ["rust_backend"], default-features = false }
 num-traits = "0.2.12"
+instant = "0.1.9"
 
 [dependencies.steven_shared]
 path = "../shared"

protocol/src/protocol/mod.rs

@@ -29,6 +29,7 @@ use crate::shared::Position;
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use flate2::read::{ZlibDecoder, ZlibEncoder};
 use flate2::Compression;
+use instant::{Duration, Instant};
 use log::debug;
 use std::convert;
 use std::default;
@@ -37,7 +38,6 @@ use std::io;
 use std::io::{Read, Write};
 use std::net::TcpStream;
 use std::sync::atomic::{AtomicBool, AtomicI32, Ordering};
-use std::time::{Duration, Instant};
 
 pub const SUPPORTED_PROTOCOLS: [i32; 24] = [
     754, 753, 751, 736, 735, 578, 575, 498, 490, 485, 480, 477, 452, 451, 404, 340, 316, 315, 210,

src/entity/player.rs

@@ -12,9 +12,9 @@ use crate::types::Gamemode;
 use crate::world;
 use cgmath::{self, Decomposed, Matrix4, Point3, Quaternion, Rad, Rotation3, Vector3};
 use collision::{Aabb, Aabb3};
+use instant::Instant;
 use std::collections::HashMap;
 use std::hash::BuildHasherDefault;
-use std::time::Instant;
 
 pub fn add_systems(m: &mut ecs::Manager) {
     let sys = MovementHandler::new(m);

src/main.rs

@@ -17,9 +17,9 @@
 #![allow(clippy::many_single_char_names)] // short variable names provide concise clarity
 #![allow(clippy::float_cmp)] // float comparison used to check if changed
 
+use instant::{Duration, Instant};
 use log::{error, info, warn};
 use std::fs;
-use std::time::{Duration, Instant};
 extern crate steven_shared as shared;
 
 use structopt::StructOpt;

src/screen/server_list.rs

@@ -24,8 +24,8 @@ use crate::protocol;
 use crate::render;
 use crate::ui;
 
+use instant::Duration;
 use rand::Rng;
-use std::time::Duration;
 
 pub struct ServerList {
     elements: Option<UIElements>,

src/ui/logo.rs

@@ -1,10 +1,10 @@
 use crate::render;
 use crate::resources;
 use crate::ui;
+use instant::Instant;
 use rand::{self, seq::SliceRandom};
 use std::f64::consts;
 use std::sync::{Arc, RwLock};
-use std::time::{SystemTime, UNIX_EPOCH};
 
 pub struct Logo {
     _shadow: ui::BatchRef,
@@ -15,6 +15,7 @@ pub struct Logo {
     text_orig_x: f64,
     text_index: isize,
     text_strings: Vec<String>,
+    started: Instant,
 }
 
 impl Logo {
@@ -131,11 +132,12 @@ impl Logo {
             text_orig_x,
             text_index: -1,
             text_strings,
+            started: Instant::now(),
         }
     }
 
     pub fn tick(&mut self, renderer: &mut render::Renderer) {
-        let now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
+        let now = Instant::now().duration_since(self.started);
 
         // Splash text
         let text_index = (now.as_secs() / 15) as isize % self.text_strings.len() as isize;

src/world/mod.rs

@@ -206,7 +206,7 @@ impl World {
 
     #[allow(clippy::verbose_bit_mask)] // "llvm generates better code" for updates_performed & 0xFFF "on x86"
     pub fn tick(&mut self, m: &mut ecs::Manager) {
-        use std::time::Instant;
+        use instant::Instant;
         let start = Instant::now();
         let mut updates_performed = 0;
         while !self.light_updates.is_empty() {