matrix-react-sdk
Version:
SDK for matrix.org using React
115 lines (109 loc) • 19.7 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = exports.DefaultOptions = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _arrays = require("../../utils/arrays");
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2.default)(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; } /*
Copyright 2024 New Vector Ltd.
Copyright 2020-2023 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
const DefaultOptions = exports.DefaultOptions = {
maxCount: 200,
gravity: 0.05,
maxDrift: 5
};
const KEY_FRAME_INTERVAL = 15; // 15ms, roughly
class Snowfall {
constructor(options) {
(0, _defineProperty2.default)(this, "options", void 0);
(0, _defineProperty2.default)(this, "context", null);
(0, _defineProperty2.default)(this, "particles", []);
(0, _defineProperty2.default)(this, "lastAnimationTime", 0);
(0, _defineProperty2.default)(this, "isRunning", false);
(0, _defineProperty2.default)(this, "start", async (canvas, timeout = 3000) => {
if (!canvas) {
return;
}
this.context = canvas.getContext("2d");
this.particles = [];
const count = this.options.maxCount;
while (this.particles.length < count) {
this.particles.push(this.resetParticle({}, canvas.width, canvas.height));
}
this.isRunning = true;
requestAnimationFrame(this.renderLoop);
if (timeout) {
window.setTimeout(this.stop, timeout);
}
});
(0, _defineProperty2.default)(this, "stop", async () => {
this.isRunning = false;
});
(0, _defineProperty2.default)(this, "resetParticle", (particle, width, height) => {
particle.x = Math.random() * width;
particle.y = Math.random() * -height;
particle.xCol = particle.x;
particle.diameter = Math.random() * 7 + 4;
particle.maximumDrift = Math.random() * this.options.maxDrift + 3.5;
particle.gravity = this.options.gravity + Math.random() * 6 + 4;
return particle;
});
(0, _defineProperty2.default)(this, "renderLoop", () => {
if (!this.context || !this.context.canvas) {
return;
}
if (this.particles.length === 0) {
this.context.clearRect(0, 0, this.context.canvas.width, this.context.canvas.height);
} else {
const timeDelta = Date.now() - this.lastAnimationTime;
if (timeDelta >= KEY_FRAME_INTERVAL || !this.lastAnimationTime) {
// Clear the screen first
this.context.clearRect(0, 0, this.context.canvas.width, this.context.canvas.height);
this.lastAnimationTime = Date.now();
this.animateAndRenderSnowflakes();
}
requestAnimationFrame(this.renderLoop);
}
});
this.options = _objectSpread(_objectSpread({}, DefaultOptions), options);
}
animateAndRenderSnowflakes() {
if (!this.context || !this.context.canvas) {
return;
}
const height = this.context.canvas.height;
for (const particle of (0, _arrays.arrayFastClone)(this.particles)) {
particle.y += particle.gravity;
// We treat the drift as a sine function to have a more fluid-like movement instead
// of a pong-like movement off walls of the X column. This means that for
// $x=A\sin(\frac{2\pi}{P}y)$ we use the `maximumDrift` as the amplitude (A) and a
// large multiplier to create a very long waveform through P.
const peakDistance = 75 * particle.maximumDrift;
const PI2 = Math.PI * 2;
particle.x = particle.maximumDrift * Math.sin(PI2 / peakDistance * particle.y);
particle.x += particle.xCol; // bring the particle to the right place
const radius = particle.diameter / 2;
this.context.save();
this.context.beginPath();
this.context.ellipse(particle.x, particle.y, radius, radius, 0, 0, 360);
this.context.fillStyle = "#eaeaea"; // grey so it shows up on the light theme
this.context.fill();
this.context.closePath();
this.context.restore();
// Remove any dead snowflakes
const maxBounds = radius * 4; // make sure it's *really* off screen
if (particle.y > height + maxBounds) {
const idx = this.particles.indexOf(particle);
this.particles.splice(idx, 1);
}
}
}
}
exports.default = Snowfall;
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Each snowflake varies.\n     */\n    maxDrift: number;\n};\n\ntype Snowflake = {\n    x: number;\n    y: number;\n    xCol: number;\n    diameter: number;\n    maximumDrift: number;\n    gravity: number;\n};\n\nexport const DefaultOptions: SnowfallOptions = {\n    maxCount: 200,\n    gravity: 0.05,\n    maxDrift: 5,\n};\n\nconst KEY_FRAME_INTERVAL = 15; // 15ms, roughly\n\nexport default class Snowfall implements ICanvasEffect {\n    private readonly options: SnowfallOptions;\n\n    public constructor(options: { [key: string]: any }) {\n        this.options = { ...DefaultOptions, ...options };\n    }\n\n    private context: CanvasRenderingContext2D | null = null;\n    private particles: Array<Snowflake> = [];\n    private lastAnimationTime = 0;\n\n    public isRunning = false;\n\n    public start = async (canvas: HTMLCanvasElement, timeout = 3000): Promise<void> => {\n        if (!canvas) {\n            return;\n        }\n        this.context = canvas.getContext(\"2d\");\n        this.particles = [];\n        const count = this.options.maxCount;\n        while (this.particles.length < count) {\n            this.particles.push(this.resetParticle({} as Snowflake, canvas.width, canvas.height));\n        }\n        this.isRunning = true;\n        requestAnimationFrame(this.renderLoop);\n        if (timeout) {\n            window.setTimeout(this.stop, timeout);\n        }\n    };\n\n    public stop = async (): Promise<void> => {\n        this.isRunning = false;\n    };\n\n    private resetParticle = (particle: Snowflake, width: number, height: number): Snowflake => {\n        particle.x = Math.random() * width;\n        particle.y = Math.random() * -height;\n        particle.xCol = particle.x;\n        particle.diameter = Math.random() * 7 + 4;\n        particle.maximumDrift = Math.random() * this.options.maxDrift + 3.5;\n        particle.gravity = this.options.gravity + Math.random() * 6 + 4;\n        return particle;\n    };\n\n    private renderLoop = (): void => {\n        if (!this.context || !this.context.canvas) {\n            return;\n        }\n        if (this.particles.length === 0) {\n            this.context.clearRect(0, 0, this.context.canvas.width, this.context.canvas.height);\n        } else {\n            const timeDelta = Date.now() - this.lastAnimationTime;\n            if (timeDelta >= KEY_FRAME_INTERVAL || !this.lastAnimationTime) {\n                // Clear the screen first\n                this.context.clearRect(0, 0, this.context.canvas.width, this.context.canvas.height);\n\n                this.lastAnimationTime = Date.now();\n                this.animateAndRenderSnowflakes();\n            }\n            requestAnimationFrame(this.renderLoop);\n        }\n    };\n\n    private animateAndRenderSnowflakes(): void {\n        if (!this.context || !this.context.canvas) {\n            return;\n        }\n        const height = this.context.canvas.height;\n        for (const particle of arrayFastClone(this.particles)) {\n            particle.y += particle.gravity;\n\n            // We treat the drift as a sine function to have a more fluid-like movement instead\n            // of a pong-like movement off walls of the X column. This means that for\n            // $x=A\\sin(\\frac{2\\pi}{P}y)$ we use the `maximumDrift` as the amplitude (A) and a\n            // large multiplier to create a very long waveform through P.\n            const peakDistance = 75 * particle.maximumDrift;\n            const PI2 = Math.PI * 2;\n            particle.x = particle.maximumDrift * Math.sin((PI2 / peakDistance) * particle.y);\n            particle.x += particle.xCol; // bring the particle to the right place\n\n            const radius = particle.diameter / 2;\n            this.context.save();\n            this.context.beginPath();\n            this.context.ellipse(particle.x, particle.y, radius, radius, 0, 0, 360);\n            this.context.fillStyle = \"#eaeaea\"; // grey so it shows up on the light theme\n            this.context.fill();\n            this.context.closePath();\n            this.context.restore();\n\n            // Remove any dead snowflakes\n            const maxBounds = radius * 4; // make sure it's *really* off screen\n            if (particle.y > height + maxBounds) {\n                const idx = this.particles.indexOf(particle);\n                this.particles.splice(idx, 1);\n            }\n        }\n    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