@yume-chan/scrcpy
Version:
TypeScript implementation of Scrcpy client.
59 lines • 1.7 kB
JavaScript
import { s32, struct, u16, u32, u8 } from "@yume-chan/struct";
export const InjectScrollControlMessage = struct({
type: u8,
pointerX: u32,
pointerY: u32,
videoWidth: u16,
videoHeight: u16,
scrollX: s32,
scrollY: s32,
}, { littleEndian: false });
/**
* 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 ScrollController {
#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 InjectScrollControlMessage.serialize(processed);
}
}
export function createScrollController() {
return new ScrollController();
}
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