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auto_rows.js	3.35 KB	-rw-rw-r--
backoff_timer.js	5.12 KB	-rw-rw-r--
chart_axis.js	7.43 KB	-rw-rw-r--
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chartjs.js	933 B	-rw-rw-r--
config.js	1.05 KB	-rw-rw-r--
custom_interaction_events.js	16.56 KB	-rw-rw-r--
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first.js	1.38 KB	-rw-rw-r--
form-autocomplete.js	40.7 KB	-rw-rw-r--
form-cohort-selector.js	2.56 KB	-rw-rw-r--
form-course-selector.js	3.75 KB	-rw-rw-r--
fragment.js	4.72 KB	-rw-rw-r--
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loglevel.js	8.99 KB	-rw-rw-r--
modal.js	23.49 KB	-rw-rw-r--
modal_backdrop.js	3.86 KB	-rw-rw-r--
modal_cancel.js	2.57 KB	-rw-rw-r--
modal_confirm.js	1.78 KB	-rw-rw-r--
modal_events.js	1.49 KB	-rw-rw-r--
modal_factory.js	7.64 KB	-rw-rw-r--
modal_registry.js	2.29 KB	-rw-rw-r--
modal_save_cancel.js	3.74 KB	-rw-rw-r--
mustache.js	22.86 KB	-rw-rw-r--
notification.js	9.2 KB	-rw-rw-r--
paged_content_events.js	998 B	-rw-rw-r--
paged_content_factory.js	9.6 KB	-rw-rw-r--
paged_content_pages.js	10.26 KB	-rw-rw-r--
paged_content_paging_bar.js	6.83 KB	-rw-rw-r--
paged_content_paging_dropdown....	7.18 KB	-rw-rw-r--
permissionmanager.js	9.61 KB	-rw-rw-r--
popover_region_controller.js	12.58 KB	-rw-rw-r--
popper.js	79.2 KB	-rw-rw-r--
search-input.js	3.24 KB	-rw-rw-r--
sessionstorage.js	2.24 KB	-rw-rw-r--
storagewrapper.js	5.17 KB	-rw-rw-r--
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tag.js	18.12 KB	-rw-rw-r--
templates.js	31.41 KB	-rw-rw-r--
tooltip.js	4.1 KB	-rw-rw-r--
tree.js	17.58 KB	-rw-rw-r--
truncate.js	6.65 KB	-rw-rw-r--
url.js	3.69 KB	-rw-rw-r--
user_date.js	7.47 KB	-rw-rw-r--
yui.js	1.15 KB	-rw-rw-r--

Code Editor : backoff_timer.js

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * A timer that will execute a callback with decreasing frequency. Useful for
 * doing polling on the server without overwhelming it with requests.
 *
 * @module     core/backoff_timer
 * @class      backoff_timer
 * @package    core
 * @copyright  2016 Ryan Wyllie <ryan@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
define(function() {

/**
     * Constructor for the back off timer.
     *
     * @param {function} callback The function to execute after each tick
     * @param {function} backoffFunction The function to determine what the next timeout value should be
     */
    var BackoffTimer = function(callback, backoffFunction) {
        this.callback = callback;
        this.backOffFunction = backoffFunction;
    };

/**
     * @type {function} callback The function to execute after each tick
     */
    BackoffTimer.prototype.callback = null;

/**
     * @type {function} backoffFunction The function to determine what the next timeout value should be
     */
    BackoffTimer.prototype.backOffFunction = null;

/**
     * @type {int} time The timeout value to use
     */
    BackoffTimer.prototype.time = null;

/**
     * @type {numeric} timeout The timeout identifier
     */
    BackoffTimer.prototype.timeout = null;

/**
     * Generate the next timeout in the back off time sequence
     * for the timer.
     *
     * The back off function is called to calculate the next value.
     * It is given the current value and an array of all previous values.
     *
     * @method generateNextTime
     * @return {int} The new timeout value (in milliseconds)
     */
    BackoffTimer.prototype.generateNextTime = function() {
        var newTime = this.backOffFunction(this.time);
        this.time = newTime;

return newTime;
    };

/**
     * Stop the current timer and clear the previous time values
     *
     * @method reset
     * @return {object} this
     */
    BackoffTimer.prototype.reset = function() {
        this.time = null;
        this.stop();

return this;
    };

/**
     * Clear the current timeout, if one is set.
     *
     * @method stop
     * @return {object} this
     */
    BackoffTimer.prototype.stop = function() {
        if (this.timeout) {
            window.clearTimeout(this.timeout);
            this.timeout = null;
        }

return this;
    };

/**
     * Start the current timer by generating the new timeout value and
     * starting the ticks.
     *
     * This function recurses after each tick with a new timeout value
     * generated each time.
     *
     * The callback function is called after each tick.
     *
     * @method start
     * @return {object} this
     */
    BackoffTimer.prototype.start = function() {
        // If we haven't already started.
        if (!this.timeout) {
            var time = this.generateNextTime();
            this.timeout = window.setTimeout(function() {
                this.callback();
                // Clear the existing timer.
                this.stop();
                // Start the next timer.
                this.start();
            }.bind(this), time);
        }

return this;
    };

/**
     * Reset the timer and start it again from the initial timeout
     * values
     *
     * @method restart
     * @return {object} this
     */
    BackoffTimer.prototype.restart = function() {
        return this.reset().start();
    };

/**
     * Returns an incremental function for the timer.
     *
     * @param {int} minamount The minimum amount of time we wait before checking
     * @param {int} incrementamount The amount to increment the timer by
     * @param {int} maxamount The max amount to ever increment to
     * @param {int} timeoutamount The timeout to use once we reach the max amount
     * @return {function}
     */
     BackoffTimer.getIncrementalCallback = function(minamount, incrementamount, maxamount, timeoutamount) {

/**
         * An incremental function for the timer.
         *
         * @param {(int|null)} time The current timeout value or null if none set
         * @return {int} The new timeout value
         */
        return function(time) {
            if (!time) {
                return minamount;
            }

// Don't go over the max amount.
            if (time + incrementamount > maxamount) {
                return timeoutamount;
            }

return time + incrementamount;
        };
    };

return BackoffTimer;
});

${this.title}

Code Editor : backoff_timer.js