forked from mirrors/gecko-dev
760c603bcb
- Added `--enable-uniffi-fixtures` flag. When set, we will compile in the UniFFI test fixtures into our shared Rust crate and eventually into `libxul`. - Vendoring in the Rust crates needed for `uniffi-bindgen-gecko-js` Differential Revision: https://phabricator.services.mozilla.com/D144467
65 lines
1.8 KiB
Rust
65 lines
1.8 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use std::sync::RwLock;
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// A point in two-dimensional space.
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#[derive(Debug, Clone)]
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pub struct Point {
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x: f64,
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y: f64,
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}
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// A magnitude and direction in two-dimensional space.
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// For simplicity we represent this as a point relative to the origin.
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#[derive(Debug, Clone)]
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pub struct Vector {
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dx: f64,
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dy: f64,
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}
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// Move from the given Point, according to the given Vector.
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pub fn translate(p: &Point, v: Vector) -> Point {
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Point {
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x: p.x + v.dx,
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y: p.y + v.dy,
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}
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}
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// An entity in our imaginary world, which occupies a position in space
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// and which can move about over time.
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#[derive(Debug)]
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pub struct Sprite {
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// We must use interior mutability for managing mutable state, hence the `RwLock`.
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current_position: RwLock<Point>,
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}
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impl Sprite {
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fn new(initial_position: Option<Point>) -> Sprite {
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Sprite {
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current_position: RwLock::new(initial_position.unwrap_or(Point { x: 0.0, y: 0.0 })),
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}
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}
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fn new_relative_to(reference: Point, direction: Vector) -> Sprite {
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Sprite {
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current_position: RwLock::new(translate(&reference, direction)),
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}
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}
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fn get_position(&self) -> Point {
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self.current_position.read().unwrap().clone()
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}
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fn move_to(&self, position: Point) {
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*self.current_position.write().unwrap() = position;
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}
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fn move_by(&self, direction: Vector) {
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let mut current_position = self.current_position.write().unwrap();
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*current_position = translate(&*current_position, direction)
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}
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}
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include!(concat!(env!("OUT_DIR"), "/sprites.uniffi.rs"));
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