piskel/js/service/LocalStorageService.js
2012-09-16 15:36:45 +02:00

89 lines
2.7 KiB
JavaScript

(function () {
var ns = $.namespace("pskl.service");
ns.LocalStorageService = function (framesheet_) {
if(framesheet_ === undefined) {
throw "Bad LocalStorageService initialization: <undefined frameSheet>";
}
this.framesheet = framesheet_;
this.localStorageThrottler_ = null;
};
/**
* @private
*/
ns.LocalStorageService.prototype.persistToLocalStorageRequest_ = function () {
// Persist to localStorage when drawing. We throttle localStorage accesses
// for high frequency drawing (eg mousemove).
if(this.localStorageThrottler_ !== null) {
window.clearTimeout(this.localStorageThrottler_);
}
this.localStorageThrottler_ = window.setTimeout($.proxy(function() {
this.persistToLocalStorage_();
this.localStorageThrottler_ = null;
}, this), 1000);
};
/**
* @private
*/
ns.LocalStorageService.prototype.persistToLocalStorage_ = function() {
console.log('[LocalStorage service]: Snapshot stored');
window.localStorage.snapShot = this.framesheet.serialize();
};
/**
* @private
*/
ns.LocalStorageService.prototype.restoreFromLocalStorage_ = function() {
this.framesheet.deserialize(window.localStorage.snapShot);
this.framesheet.setCurrentFrameIndex(0);
};
/**
* @private
*/
ns.LocalStorageService.prototype.cleanLocalStorage_ = function() {
console.log('[LocalStorage service]: Snapshot removed');
delete window.localStorage.snapShot;
};
/**
* @public
*/
ns.LocalStorageService.prototype.init = function(framesheet_) {
$.subscribe(Events.LOCALSTORAGE_REQUEST, $.proxy(this.persistToLocalStorageRequest_, this));
};
/**
* @public
*/
ns.LocalStorageService.prototype.displayRestoreNotification = function() {
if(window.localStorage && window.localStorage.snapShot) {
var reloadLink = "<a href='#' class='localstorage-restore onclick='piskel.restoreFromLocalStorage()'>reload</a>";
var discardLink = "<a href='#' class='localstorage-discard' onclick='piskel.cleanLocalStorage()'>discard</a>";
var content = "Non saved version found. " + reloadLink + " or " + discardLink;
$.publish(Events.SHOW_NOTIFICATION, [{
"content": content,
"behavior": $.proxy(function(rootNode) {
rootNode = $(rootNode);
rootNode.click($.proxy(function(evt) {
var target = $(evt.target);
if(target.hasClass("localstorage-restore")) {
this.restoreFromLocalStorage_();
}
else if (target.hasClass("localstorage-discard")) {
this.cleanLocalStorage_();
}
$.publish(Events.HIDE_NOTIFICATION);
}, this));
}, this)
}]);
}
};
})();