@yume-chan/scrcpy/esm/options/1_16/scroll.js

TypeScript implementation of Scrcpy.

import Struct from "@yume-chan/struct";
export const ScrcpyInjectScrollControlMessage1_16 = new Struct()
    .uint8("type")
    .uint32("pointerX")
    .uint32("pointerY")
    .uint16("screenWidth")
    .uint16("screenHeight")
    .int32("scrollX")
    .int32("scrollY");
/**
 * Old version of Scrcpy server only supports integer values for scroll.
 *
 * Accumulate scroll values and send scroll message when accumulated value
 * reaches 1 or -1.
 */
export class ScrcpyScrollController1_16 {
    #accumulatedX = 0;
    #accumulatedY = 0;
    processMessage(message) {
        this.#accumulatedX += message.scrollX;
        this.#accumulatedY += message.scrollY;
        let scrollX = 0;
        let scrollY = 0;
        if (this.#accumulatedX >= 1) {
            scrollX = 1;
            this.#accumulatedX = 0;
        }
        else if (this.#accumulatedX <= -1) {
            scrollX = -1;
            this.#accumulatedX = 0;
        }
        if (this.#accumulatedY >= 1) {
            scrollY = 1;
            this.#accumulatedY = 0;
        }
        else if (this.#accumulatedY <= -1) {
            scrollY = -1;
            this.#accumulatedY = 0;
        }
        if (scrollX === 0 && scrollY === 0) {
            return undefined;
        }
        message.scrollX = scrollX;
        message.scrollY = scrollY;
        return message;
    }
    serializeScrollMessage(message) {
        const processed = this.processMessage(message);
        if (!processed) {
            return undefined;
        }
        return ScrcpyInjectScrollControlMessage1_16.serialize(processed);
    }
}
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