@nativescript/core/timer/index.android.js

/**
 * Android specific timer functions implementation.
 */
let timeoutHandler;
const timeoutCallbacks = {};
// this is needed to keep a strong reference to the callback
// currently fixes a race condition in V8 with the android runtime implementation of WeakRef
// there are fixes in the android runtime that will remove the need for this
const timeoutCallbacksCb = {};
let timerId = 0;
function createHandlerAndGetId() {
    if (!timeoutHandler) {
        timeoutHandler = new android.os.Handler(android.os.Looper.myLooper());
    }
    timerId++;
    return timerId;
}
export function setTimeout(callback, milliseconds = 0, ...args) {
    // Cast to Number
    milliseconds += 0;
    const id = createHandlerAndGetId();
    const invoke = () => callback(...args);
    const zoneBound = zonedCallback(invoke);
    const runnable = new java.lang.Runnable({
        run: () => {
            zoneBound();
            if (timeoutCallbacks[id]) {
                delete timeoutCallbacks[id];
                delete timeoutCallbacksCb[id];
            }
        },
    });
    if (!timeoutCallbacks[id]) {
        timeoutCallbacks[id] = runnable;
        timeoutCallbacksCb[id] = callback;
    }
    timeoutHandler.postDelayed(runnable, long(milliseconds));
    return id;
}
export function clearTimeout(id) {
    const index = id;
    if (timeoutCallbacks[index]) {
        timeoutHandler.removeCallbacks(timeoutCallbacks[index]);
        delete timeoutCallbacks[index];
        delete timeoutCallbacksCb[index];
    }
}
export function setInterval(callback, milliseconds = 0, ...args) {
    // Cast to Number
    milliseconds += 0;
    const id = createHandlerAndGetId();
    const handler = timeoutHandler;
    const invoke = () => callback(...args);
    const zoneBound = zonedCallback(invoke);
    const startOffset = milliseconds > 0 ? Date.now() % milliseconds : 0;
    function nextCallMs() {
        return milliseconds > 0 ? milliseconds - ((Date.now() - startOffset) % milliseconds) : milliseconds;
    }
    const runnable = new java.lang.Runnable({
        run: () => {
            zoneBound();
            if (timeoutCallbacks[id]) {
                handler.postDelayed(runnable, long(nextCallMs()));
            }
        },
    });
    if (!timeoutCallbacks[id]) {
        timeoutCallbacks[id] = runnable;
        timeoutCallbacksCb[id] = callback;
    }
    timeoutHandler.postDelayed(runnable, long(nextCallMs()));
    return id;
}
export const clearInterval = clearTimeout;
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