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jquery.terminal-1.4.3.js
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jquery.terminal-1.4.3.js
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/**@license
* __ _____ ________ __
* / // _ /__ __ _____ ___ __ _/__ ___/__ ___ ______ __ __ __ ___ / /
* __ / // // // // // _ // _// // / / // _ // _// // // \/ // _ \/ /
* / / // // // // // ___// / / // / / // ___// / / / / // // /\ // // / /__
* \___//____ \\___//____//_/ _\_ / /_//____//_/ /_/ /_//_//_/ /_/ \__\_\___/
* \/ /____/ version DEV
*
* This file is part of jQuery Terminal. http://terminal.jcubic.pl
*
* Copyright (c) 2010-2017 Jakub Jankiewicz <http://jcubic.pl/me>
* Released under the MIT license
*
* Contains:
*
* Storage plugin Distributed under the MIT License
* Copyright (c) 2010 Dave Schindler
*
* jQuery Timers licenced with the WTFPL
* <http://jquery.offput.ca/timers/>
*
* Cross-Browser Split 1.1.1
* Copyright 2007-2012 Steven Levithan <stevenlevithan.com>
* Available under the MIT License
*
* jQuery Caret
* Copyright (c) 2009, Gideon Sireling
* 3 clause BSD License
*
* sprintf.js
* Copyright (c) 2007-2013 Alexandru Marasteanu <hello at alexei dot ro>
* licensed under 3 clause BSD license
*
* Date: Sun, 02 Jul 2017 13:48:47 +0000
*/
/* TODO:
*
* Debug interpreters names in LocalStorage
* onPositionChange event add to terminal ???
* different command line history for each login users (add login if present to
* localStorage key)
*
* TEST: login + promises/exec
* json-rpc/object + promises
*
* NOTE: json-rpc don't need promises and delegate resume/pause because only
* exec can call it and exec call interpreter that work with resume/pause
*/
/* global location, jQuery, setTimeout, window, global, localStorage, sprintf,
setImmediate, IntersectionObserver, MutationObserver */
/* eslint-disable */
(function(ctx) {
var sprintf = function() {
if (!sprintf.cache.hasOwnProperty(arguments[0])) {
sprintf.cache[arguments[0]] = sprintf.parse(arguments[0]);
}
return sprintf.format.call(null, sprintf.cache[arguments[0]], arguments);
};
sprintf.format = function(parse_tree, argv) {
var cursor = 1, tree_length = parse_tree.length, node_type = '', arg, output = [], i, k, match, pad, pad_character, pad_length;
for (i = 0; i < tree_length; i++) {
node_type = get_type(parse_tree[i]);
if (node_type === 'string') {
output.push(parse_tree[i]);
}
else if (node_type === 'array') {
match = parse_tree[i]; // convenience purposes only
if (match[2]) { // keyword argument
arg = argv[cursor];
for (k = 0; k < match[2].length; k++) {
if (!arg.hasOwnProperty(match[2][k])) {
throw(sprintf('[sprintf] property "%s" does not exist', match[2][k]));
}
arg = arg[match[2][k]];
}
}
else if (match[1]) { // positional argument (explicit)
arg = argv[match[1]];
}
else { // positional argument (implicit)
arg = argv[cursor++];
}
if (/[^s]/.test(match[8]) && (get_type(arg) !== 'number')) {
throw(sprintf('[sprintf] expecting number but found %s', get_type(arg)));
}
switch (match[8]) {
case 'b': arg = arg.toString(2); break;
case 'c': arg = String.fromCharCode(arg); break;
case 'd': arg = parseInt(arg, 10); break;
case 'e': arg = match[7] ? arg.toExponential(match[7]) : arg.toExponential(); break;
case 'f': arg = match[7] ? parseFloat(arg).toFixed(match[7]) : parseFloat(arg); break;
case 'o': arg = arg.toString(8); break;
case 's': arg = ((arg = String(arg)) && match[7] ? arg.substring(0, match[7]) : arg); break;
case 'u': arg = arg >>> 0; break;
case 'x': arg = arg.toString(16); break;
case 'X': arg = arg.toString(16).toUpperCase(); break;
}
arg = (/[def]/.test(match[8]) && match[3] && arg >= 0 ? ' +' + arg : arg);
pad_character = match[4] ? match[4] === '0' ? '0' : match[4].charAt(1) : ' ';
pad_length = match[6] - String(arg).length;
pad = match[6] ? str_repeat(pad_character, pad_length) : '';
output.push(match[5] ? arg + pad : pad + arg);
}
}
return output.join('');
};
sprintf.cache = {};
sprintf.parse = function(fmt) {
var _fmt = fmt, match = [], parse_tree = [], arg_names = 0;
while (_fmt) {
if ((match = /^[^\x25]+/.exec(_fmt)) !== null) {
parse_tree.push(match[0]);
}
else if ((match = /^\x25{2}/.exec(_fmt)) !== null) {
parse_tree.push('%');
}
else if ((match = /^\x25(?:([1-9]\d*)\$|\(([^\)]+)\))?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(_fmt)) !== null) {
if (match[2]) {
arg_names |= 1;
var field_list = [], replacement_field = match[2], field_match = [];
if ((field_match = /^([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
field_list.push(field_match[1]);
while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') {
if ((field_match = /^\.([a-z_][a-z_\d]*)/i.exec(replacement_field)) !== null) {
field_list.push(field_match[1]);
}
else if ((field_match = /^\[(\d+)\]/.exec(replacement_field)) !== null) {
field_list.push(field_match[1]);
}
else {
throw('[sprintf] huh?');
}
}
}
else {
throw('[sprintf] huh?');
}
match[2] = field_list;
}
else {
arg_names |= 2;
}
if (arg_names === 3) {
throw('[sprintf] mixing positional and named placeholders is not (yet) supported');
}
parse_tree.push(match);
}
else {
throw('[sprintf] huh?');
}
_fmt = _fmt.substring(match[0].length);
}
return parse_tree;
};
var vsprintf = function(fmt, argv, _argv) {
_argv = argv.slice(0);
_argv.splice(0, 0, fmt);
return sprintf.apply(null, _argv);
};
/**
* helpers
*/
function get_type(variable) {
return Object.prototype.toString.call(variable).slice(8, -1).toLowerCase();
}
function str_repeat(input, multiplier) {
for (var output = []; multiplier > 0; output[--multiplier] = input) {/* do nothing */}
return output.join('');
}
/**
* export to either browser or node.js
*/
ctx.sprintf = sprintf;
ctx.vsprintf = vsprintf;
})(typeof global !== "undefined" ? global : window);
/* eslint-enable */
(function($, undefined) {
'use strict';
// -----------------------------------------------------------------------
// :: Replacemenet for jQuery 2 deferred objects
// -----------------------------------------------------------------------
function DelayQueue() {
var callbacks = $.Callbacks();
var resolved = false;
this.resolve = function() {
callbacks.fire();
resolved = true;
};
this.add = function(fn) {
if (resolved) {
fn();
} else {
callbacks.add(fn);
}
};
}
// -----------------------------------------------------------------------
// :: map object to object
// -----------------------------------------------------------------------
$.omap = function(o, fn) {
var result = {};
$.each(o, function(k, v) {
result[k] = fn.call(o, k, v);
});
return result;
};
// -----------------------------------------------------------------------
// :: Deep clone of objects and arrays
// -----------------------------------------------------------------------
var Clone = {
clone_object: function(object) {
var tmp = {};
if (typeof object === 'object') {
if ($.isArray(object)) {
return this.clone_array(object);
} else if (object === null) {
return object;
} else {
for (var key in object) {
if ($.isArray(object[key])) {
tmp[key] = this.clone_array(object[key]);
} else if (typeof object[key] === 'object') {
tmp[key] = this.clone_object(object[key]);
} else {
tmp[key] = object[key];
}
}
}
}
return tmp;
},
clone_array: function(array) {
if (!$.isFunction(Array.prototype.map)) {
throw new Error("Your browser don't support ES5 array map " +
'use es5-shim');
}
return array.slice(0).map(function(item) {
if (typeof item === 'object') {
return this.clone_object(item);
} else {
return item;
}
}.bind(this));
}
};
var clone = function(object) {
return Clone.clone_object(object);
};
/* eslint-disable */
var hasLS = function() {
var testKey = 'test', storage = window.localStorage;
try {
storage.setItem(testKey, '1');
storage.removeItem(testKey);
return true;
} catch (error) {
return false;
}
};
// -----------------------------------------------------------------------
// :: Storage plugin
// -----------------------------------------------------------------------
// Private data
var isLS = hasLS();
// Private functions
function wls(n, v) {
var c;
if (typeof n === 'string' && typeof v === 'string') {
localStorage[n] = v;
return true;
} else if (typeof n === 'object' && typeof v === 'undefined') {
for (c in n) {
if (n.hasOwnProperty(c)) {
localStorage[c] = n[c];
}
}
return true;
}
return false;
}
function wc(n, v) {
var dt, e, c;
dt = new Date();
dt.setTime(dt.getTime() + 31536000000);
e = '; expires=' + dt.toGMTString();
if (typeof n === 'string' && typeof v === 'string') {
document.cookie = n + '=' + v + e + '; path=/';
return true;
} else if (typeof n === 'object' && typeof v === 'undefined') {
for (c in n) {
if (n.hasOwnProperty(c)) {
document.cookie = c + '=' + n[c] + e + '; path=/';
}
}
return true;
}
return false;
}
function rls(n) {
return localStorage[n];
}
function rc(n) {
var nn, ca, i, c;
nn = n + '=';
ca = document.cookie.split(';');
for (i = 0; i < ca.length; i++) {
c = ca[i];
while (c.charAt(0) === ' ') {
c = c.substring(1, c.length);
}
if (c.indexOf(nn) === 0) {
return c.substring(nn.length, c.length);
}
}
return null;
}
function dls(n) {
return delete localStorage[n];
}
function dc(n) {
return wc(n, '', -1);
}
/**
* Public API
* $.Storage.set("name", "value")
* $.Storage.set({"name1":"value1", "name2":"value2", etc})
* $.Storage.get("name")
* $.Storage.remove("name")
*/
$.extend({
Storage: {
set: isLS ? wls : wc,
get: isLS ? rls : rc,
remove: isLS ? dls : dc
}
});
// -----------------------------------------------------------------------
// :: jQuery Timers
// -----------------------------------------------------------------------
var jQuery = $;
jQuery.fn.extend({
everyTime: function(interval, label, fn, times, belay) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, times, belay);
});
},
oneTime: function(interval, label, fn) {
return this.each(function() {
jQuery.timer.add(this, interval, label, fn, 1);
});
},
stopTime: function(label, fn) {
return this.each(function() {
jQuery.timer.remove(this, label, fn);
});
}
});
jQuery.extend({
timer: {
guid: 1,
global: {},
regex: /^([0-9]+)\s*(.*s)?$/,
powers: {
// Yeah this is major overkill...
'ms': 1,
'cs': 10,
'ds': 100,
's': 1000,
'das': 10000,
'hs': 100000,
'ks': 1000000
},
timeParse: function(value) {
if (value === undefined || value === null) {
return null;
}
var result = this.regex.exec(jQuery.trim(value.toString()));
if (result[2]) {
var num = parseInt(result[1], 10);
var mult = this.powers[result[2]] || 1;
return num * mult;
} else {
return value;
}
},
add: function(element, interval, label, fn, times, belay) {
var counter = 0;
if (jQuery.isFunction(label)) {
if (!times) {
times = fn;
}
fn = label;
label = interval;
}
interval = jQuery.timer.timeParse(interval);
if (typeof interval !== 'number' ||
isNaN(interval) ||
interval <= 0) {
return;
}
if (times && times.constructor !== Number) {
belay = !!times;
times = 0;
}
times = times || 0;
belay = belay || false;
if (!element.$timers) {
element.$timers = {};
}
if (!element.$timers[label]) {
element.$timers[label] = {};
}
fn.$timerID = fn.$timerID || this.guid++;
var handler = function() {
if (belay && handler.inProgress) {
return;
}
handler.inProgress = true;
if ((++counter > times && times !== 0) ||
fn.call(element, counter) === false) {
jQuery.timer.remove(element, label, fn);
}
handler.inProgress = false;
};
handler.$timerID = fn.$timerID;
if (!element.$timers[label][fn.$timerID]) {
element.$timers[label][fn.$timerID] = window.setInterval(handler, interval);
}
if (!this.global[label]) {
this.global[label] = [];
}
this.global[label].push(element);
},
remove: function(element, label, fn) {
var timers = element.$timers, ret;
if (timers) {
if (!label) {
for (var lab in timers) {
if (timers.hasOwnProperty(lab)) {
this.remove(element, lab, fn);
}
}
} else if (timers[label]) {
if (fn) {
if (fn.$timerID) {
window.clearInterval(timers[label][fn.$timerID]);
delete timers[label][fn.$timerID];
}
} else {
for (var _fn in timers[label]) {
if (timers[label].hasOwnProperty(_fn)) {
window.clearInterval(timers[label][_fn]);
delete timers[label][_fn];
}
}
}
for (ret in timers[label]) {
if (timers[label].hasOwnProperty(ret)) {
break;
}
}
if (!ret) {
ret = null;
delete timers[label];
}
}
for (ret in timers) {
if (timers.hasOwnProperty(ret)) {
break;
}
}
if (!ret) {
element.$timers = null;
}
}
}
}
});
if (/(msie) ([\w.]+)/.exec(navigator.userAgent.toLowerCase())) {
jQuery(window).one('unload', function() {
var global = jQuery.timer.global;
for (var label in global) {
if (global.hasOwnProperty(label)) {
var els = global[label], i = els.length;
while (--i) {
jQuery.timer.remove(els[i], label);
}
}
}
});
}
// -----------------------------------------------------------------------
// :: CROSS BROWSER SPLIT
// -----------------------------------------------------------------------
(function(undef) {
// prevent double include
if (!String.prototype.split.toString().match(/\[native/)) {
return;
}
var nativeSplit = String.prototype.split,
compliantExecNpcg = /()??/.exec("")[1] === undef, // NPCG: nonparticipating capturing group
self;
self = function(str, separator, limit) {
// If `separator` is not a regex, use `nativeSplit`
if (Object.prototype.toString.call(separator) !== "[object RegExp]") {
return nativeSplit.call(str, separator, limit);
}
var output = [],
flags = (separator.ignoreCase ? "i" : "") +
(separator.multiline ? "m" : "") +
(separator.extended ? "x" : "") + // Proposed for ES6
(separator.sticky ? "y" : ""), // Firefox 3+
lastLastIndex = 0,
// Make `global` and avoid `lastIndex` issues by working with a copy
separator2, match, lastIndex, lastLength;
separator = new RegExp(separator.source, flags + "g");
str += ""; // Type-convert
if (!compliantExecNpcg) {
// Doesn't need flags gy, but they don't hurt
separator2 = new RegExp("^" + separator.source + "$(?!\\s)", flags);
}
/* Values for `limit`, per the spec:
* If undefined: 4294967295 // Math.pow(2, 32) - 1
* If 0, Infinity, or NaN: 0
* If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296;
* If negative number: 4294967296 - Math.floor(Math.abs(limit))
* If other: Type-convert, then use the above rules
*/
// ? Math.pow(2, 32) - 1 : ToUint32(limit)
limit = limit === undef ? -1 >>> 0 : limit >>> 0;
while (match = separator.exec(str)) {
// `separator.lastIndex` is not reliable cross-browser
lastIndex = match.index + match[0].length;
if (lastIndex > lastLastIndex) {
output.push(str.slice(lastLastIndex, match.index));
// Fix browsers whose `exec` methods don't consistently return `undefined` for
// nonparticipating capturing groups
if (!compliantExecNpcg && match.length > 1) {
match[0].replace(separator2, function() {
for (var i = 1; i < arguments.length - 2; i++) {
if (arguments[i] === undef) {
match[i] = undef;
}
}
});
}
if (match.length > 1 && match.index < str.length) {
Array.prototype.push.apply(output, match.slice(1));
}
lastLength = match[0].length;
lastLastIndex = lastIndex;
if (output.length >= limit) {
break;
}
}
if (separator.lastIndex === match.index) {
separator.lastIndex++; // Avoid an infinite loop
}
}
if (lastLastIndex === str.length) {
if (lastLength || !separator.test("")) {
output.push("");
}
} else {
output.push(str.slice(lastLastIndex));
}
return output.length > limit ? output.slice(0, limit) : output;
};
// For convenience
String.prototype.split = function(separator, limit) {
return self(this, separator, limit);
};
return self;
})();
// -----------------------------------------------------------------------
// :: jQuery Caret
// -----------------------------------------------------------------------
$.fn.caret = function(pos) {
var target = this[0];
var isContentEditable = target.contentEditable === 'true';
//get
if (arguments.length === 0) {
//HTML5
if (window.getSelection) {
//contenteditable
if (isContentEditable) {
target.focus();
var range1 = window.getSelection().getRangeAt(0),
range2 = range1.cloneRange();
range2.selectNodeContents(target);
range2.setEnd(range1.endContainer, range1.endOffset);
return range2.toString().length;
}
//textarea
return target.selectionStart;
}
//IE<9
if (document.selection) {
target.focus();
//contenteditable
if (isContentEditable) {
var range1 = document.selection.createRange(),
range2 = document.body.createTextRange();
range2.moveToElementText(target);
range2.setEndPoint('EndToEnd', range1);
return range2.text.length;
}
//textarea
var pos = 0,
range = target.createTextRange(),
range2 = document.selection.createRange().duplicate(),
bookmark = range2.getBookmark();
range.moveToBookmark(bookmark);
while (range.moveStart('character', -1) !== 0) pos++;
return pos;
}
//not supported
return 0;
}
//set
if (pos === -1)
pos = this[isContentEditable? 'text' : 'val']().length;
//HTML5
if (window.getSelection) {
//contenteditable
if (isContentEditable) {
target.focus();
window.getSelection().collapse(target.firstChild, pos);
}
//textarea
else
target.setSelectionRange(pos, pos);
}
//IE<9
else if (document.body.createTextRange) {
var range = document.body.createTextRange();
range.moveToElementText(target);
range.moveStart('character', pos);
range.collapse(true);
range.select();
}
if (!isContentEditable)
target.focus();
return pos;
};
/* eslint-enable */
var requestAnimationFrame =
window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
function(fn) {
return window.setTimeout(fn, 20);
};
// -----------------------------------------------------------------------
// :: Cross-browser resize element plugin
// :: Taken from ResizeSensor.js file from marcj/css-element-queries (MIT license)
// :: not all jQuerifided
// -----------------------------------------------------------------------
$.fn.resizer = function(callback) {
var unbind = arguments[0] === "unbind";
if (!unbind && !$.isFunction(callback)) {
throw new Error(
'Invalid argument, it need to a function of string "unbind".'
);
}
return this.each(function() {
var $this = $(this);
if (unbind) {
$(this).removeData('callbacks').find('.resizer').remove();
} else if ($this.data('callbacks')) {
$(this).data('callbacks').push(callback);
} else {
$this.data('callbacks', [callback]);
var self = this;
var resizer = $('<div/>').addClass('resizer').appendTo(this)[0];
var style =
'position: absolute; left: 0; top: 0; right: 0; bottom: 0; ' +
'overflow: hidden; z-index: -1; visibility: hidden;';
var styleChild = 'position: absolute; left: 0; top: 0; transition: 0s;';
resizer.style.cssText = style;
resizer.innerHTML =
'<div class="resize-sensor-expand" style="' + style + '">' +
'<div style="' + styleChild + '"></div>' + "</div>" +
'<div class="resize-sensor-shrink" style="' + style + '">' +
'<div style="' + styleChild + ' width: 200%; height: 200%"></div>' +
"</div>";
var expand = resizer.childNodes[0];
var expandChild = expand.childNodes[0];
var shrink = resizer.childNodes[1];
var dirty, rafId, newWidth, newHeight;
var lastWidth = self.offsetWidth;
var lastHeight = self.offsetHeight;
var reset = function() {
expandChild.style.width = '100000px';
expandChild.style.height = '100000px';
expand.scrollLeft = 100000;
expand.scrollTop = 100000;
shrink.scrollLeft = 100000;
shrink.scrollTop = 100000;
};
reset();
var onResized = function() {
rafId = 0;
if (!dirty) {
return;
}
lastWidth = newWidth;
lastHeight = newHeight;
var callbacks = $this.data('callbacks');
if (callbacks && callbacks.length) {
callbacks.forEach(function(fn) {
fn();
});
}
};
var onScroll = function() {
newWidth = self.offsetWidth;
newHeight = self.offsetHeight;
dirty = newWidth !== lastWidth || newHeight !== lastHeight;
if (dirty && !rafId) {
rafId = requestAnimationFrame(onResized);
}
reset();
};
$(expand).on("scroll", onScroll);
$(shrink).on("scroll", onScroll);
}
});
};
// -----------------------------------------------------------------------
// :: hide elements from screen readers
// -----------------------------------------------------------------------
function a11y_hide(element) {
element.attr({
role: 'presentation',
'aria-hidden': 'true'
});
}
// -----------------------------------------------------------------------
// :: Split string to array of strings with the same length
// -----------------------------------------------------------------------
function str_parts(str, length) {
var result = [];
var len = str.length;
if (len < length) {
return [str];
} else if (length < 0) {
throw new Error("str_parts: length can't be negative");
}
for (var i = 0; i < len; i += length) {
result.push(str.substring(i, i + length));
}
return result;
}
// -----------------------------------------------------------------------
// :: CYCLE DATA STRUCTURE
// -----------------------------------------------------------------------
function Cycle(init) {
var data = init ? [init] : [];
var pos = 0;
$.extend(this, {
get: function() {
return data;
},
rotate: function() {
if (!data.filter(Boolean).length) {
return;
}
if (data.length === 1) {
return data[0];
} else {
if (pos === data.length - 1) {
pos = 0;
} else {
++pos;
}
if (data[pos]) {
return data[pos];
} else {
return this.rotate();
}
}
},
length: function() {
return data.length;
},
remove: function(index) {
delete data[index];
},
set: function(item) {
for (var i = data.length; i--;) {
if (data[i] === item) {
pos = i;
return;
}
}
this.append(item);
},
front: function() {
if (data.length) {
var index = pos;
var restart = false;
while (!data[index]) {
index++;
if (index > data.length) {
if (restart) {
break;
}
index = 0;
restart = true;
}
}
return data[index];
}
},
map: function(fn) {
return data.filter(Boolean).map(fn);
},
forEach: function(fn) {
data.filter(Boolean).forEach(fn);
},
append: function(item) {
data.push(item);
}
});
}
// -----------------------------------------------------------------------
// :: STACK DATA STRUCTURE
// -----------------------------------------------------------------------
function Stack(init) {
var data = init instanceof Array ? init : init ? [init] : [];
$.extend(this, {
data: function() {
return data;
},
map: function(fn) {
return $.map(data, fn);
},
size: function() {
return data.length;
},
pop: function() {
if (data.length === 0) {
return null;
} else {
var value = data[data.length - 1];
data = data.slice(0, data.length - 1);
return value;
}
},
push: function(value) {
data = data.concat([value]);
return value;
},
top: function() {
return data.length > 0 ? data[data.length - 1] : null;
},
clone: function() {
return new Stack(data.slice(0));
}
});
}
// -------------------------------------------------------------------------
// :: HISTORY CLASS
// -------------------------------------------------------------------------
function History(name, size, memory) {
var enabled = true;
var storage_key = '';
if (typeof name === 'string' && name !== '') {
storage_key = name + '_';
}
storage_key += 'commands';
var data;
if (memory) {
data = [];
} else {
data = $.Storage.get(storage_key);
data = data ? JSON.parse(data) : [];
}
var pos = data.length - 1;
$.extend(this, {
append: function(item) {
if (enabled) {
if (data[data.length - 1] !== item) {
data.push(item);
if (size && data.length > size) {
data = data.slice(-size);
}
pos = data.length - 1;
if (!memory) {
$.Storage.set(storage_key, JSON.stringify(data));
}
}
}
},
set: function(new_data) {
if (new_data instanceof Array) {
data = new_data;
if (!memory) {
$.Storage.set(storage_key, JSON.stringify(data));
}
}
},
data: function() {
return data;
},
reset: function() {
pos = data.length - 1;
},
last: function() {
return data[data.length - 1];
},
end: function() {
return pos === data.length - 1;
},
position: function() {
return pos;
},
current: function() {
return data[pos];
},
next: function() {
if (pos < data.length - 1) {
++pos;
}
if (pos !== -1) {
return data[pos];
}
},
previous: function() {
var old = pos;
if (pos > 0) {
--pos;
}
if (old !== -1) {
return data[pos];
}
},
clear: function() {
data = [];
this.purge();
},
enabled: function() {
return enabled;
},
enable: function() {
enabled = true;
},
purge: function() {
if (!memory) {
$.Storage.remove(storage_key);
}
},
disable: function() {
enabled = false;