mapeo-id-bmf/modules/util/idle_worker.js

iD Editor for osm-p2p & mapeo-desktop changed to meet requirements of Bruno Manser Fonds

export function utilIdleWorker(tasks, processor, callback) {
    var results = [], result;
    for (var i = 0; i < tasks.length; i++) {
        result = processor(tasks[i]);
        if (result) results.push(result);
    }
    callback(results);

    // var processed = [];
    // var currentPos = 0;
    // var totalTasks = tasks.length;

    // function worker(deadline) {
    //     while (deadline.timeRemaining() > 0 && currentPos < totalTasks) {
    //         var result = processor(tasks[currentPos]);

    //         // if falsy dont add to the processed list
    //         if (result) processed.push(result);
    //         currentPos++;
    //     }

    //     // more tasks are left, we might need more idleCallbacks
    //     if (currentPos < totalTasks) {
    //         return window.requestIdleCallback(function(deadline) {worker(deadline);});
    //     }

    //     // tasks are completed
    //     return callback(processed);
    // }

    // window.requestIdleCallback(function(deadline) {worker(deadline);});
}

// shim
window.requestIdleCallback =
    window.requestIdleCallback ||
    function(cb) {
        var start = Date.now();
        return setTimeout(function() {
            cb({
                didTimeout: false,
                timeRemaining: function() {
                    return Math.max(0, 50 - (Date.now() - start));
                }
            });
        }, 1);
    };

window.cancelIdleCallback =
    window.cancelIdleCallback ||
    function(id) {
        clearTimeout(id);
    };