76 lines
No EOL
2.1 KiB
JavaScript
76 lines
No EOL
2.1 KiB
JavaScript
(function () {
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var ns = $.namespace("pskl");
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ns.UserSettings = {
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SHOW_GRID : 'SHOW_GRID',
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CANVAS_BACKGROUND : 'CANVAS_BACKGROUND',
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KEY_TO_DEFAULT_VALUE_MAP_ : {
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'SHOW_GRID' : false,
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'CANVAS_BACKGROUND' : 'medium-canvas-background'
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},
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/**
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* @private
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*/
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cache_ : {},
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/**
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* Static method to access a user defined settings value ot its default
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* value if not defined yet.
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*/
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get : function (key) {
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this.checkKeyValidity_(key);
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if (!(key in this.cache_)) {
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this.cache_[key] =
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this.readFromLocalStorage_(key) || this.readFromDefaults_(key);
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}
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return this.cache_[key];
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},
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set : function (key, value) {
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this.checkKeyValidity_(key);
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this.cache_[key] = value;
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this.writeToLocalStorage_(key, value);
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$.publish(Events.USER_SETTINGS_CHANGED, [key, value]);
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},
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/**
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* @private
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*/
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readFromLocalStorage_ : function(key) {
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var value = window.localStorage[key];
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if (typeof value != "undefined") {
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value = JSON.parse(value);
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}
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return value;
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},
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/**
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* @private
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*/
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writeToLocalStorage_ : function(key, value) {
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// TODO(grosbouddha): Catch storage exception here.
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window.localStorage[key] = JSON.stringify(value);
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},
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/**
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* @private
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*/
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readFromDefaults_ : function (key) {
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return this.KEY_TO_DEFAULT_VALUE_MAP_[key];
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},
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/**
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* @private
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*/
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checkKeyValidity_ : function(key) {
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if(!(key in this.KEY_TO_DEFAULT_VALUE_MAP_)) {
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// TODO(grosbouddha): Define error catching strategy and throw exception from here.
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console.log("UserSettings key <"+ key +"> not find in supported keys.");
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}
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}
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};
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})(); |