@ginden/blinkstick-v2/dist/animations/helpers/limit-duration.js

Improved Blickstick API for Node.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.limitDuration = limitDuration;
const tsafe_1 = require("tsafe");
const complex_frame_1 = require("../frame/complex-frame");
const simple_frame_1 = require("../frame/simple-frame");
const wait_frame_1 = require("../frame/wait-frame");
/**
 * @summary Sets maximum duration for an animation.
 * The last frame can be shortened to fit the maximum duration.
 * Frames beyond the maximum duration are dropped
 * @category Animation
 */
function limitDuration(animation, maximumDuration) {
    (0, tsafe_1.assert)(maximumDuration > 0, 'maximumDuration must be greater than 0');
    return {
        [Symbol.asyncIterator]: async function* () {
            let timeTook = 0;
            for await (const frame of animation) {
                if (timeTook >= maximumDuration) {
                    return;
                }
                const { duration } = frame;
                if (timeTook + duration > maximumDuration) {
                    // If the frame is longer than the remaining time, we need to truncate it.
                    if (frame instanceof simple_frame_1.SimpleFrame) {
                        yield new simple_frame_1.SimpleFrame(frame.rgb, maximumDuration - timeTook);
                    }
                    else if (frame instanceof complex_frame_1.ComplexFrame) {
                        yield new complex_frame_1.ComplexFrame(frame.colors, maximumDuration - timeTook);
                    }
                    else {
                        yield new wait_frame_1.WaitFrame(maximumDuration - timeTook);
                    }
                }
                else {
                    yield frame;
                }
                timeTook += duration;
            }
        },
    };
}
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