gistfile1.js

/*

    Resource Manager
    
        - change app language just in time -> AUI.ResourceManager.setLocales(swahilstina)
        - give localized text to element - el.set('locale', 'fileOpen')
        - locale value could be: 'fileOpen' or ['fileOpen', 'title(anyProperty)'] or custom localize function
        - if custom localization function returns value, that value will be used for localization
        - .. but first of all you have to create locale storage (exported .net or own localization to JSON { dictionaryKey: term})
        
    Example: viz. demo    
    
*/

AUI.ResourceManager = new new Class({

	Implements: [Events],

	initialize: function() {
		this.els = [];
		this.untranslated = [];
		this.extendElement();
	},

	extendElement: function() {
		var els = this.els, 
			localize = this.localize.bind(this);
		Element.Properties.locale = {
			set: function(value, prop) {
				var item = { el: this, value: Array.flatten(arguments) };
				var oldItem = els.find(function(it){
					return it.el == this;
				}, this);
				if (oldItem) els.erase(oldItem);
				els.push(item);
				localize(item);
			}
		}
	},
	
	localize: function(item) {
		var value = item.value[0], 
			prop = item.value[1] || (item.el.get('tag') == 'input' ? 'value' : 'html');
        switch ($type(value)) {
            case 'string': item.el.set(prop, this.getTerm(value)); break;
            case 'function': (value = value.call(item.el, this)) && item.el.set(prop, value);
        }
	},
	
	getTerm: function(key) {
        var term = this.storage[key];
        if (!term) {
            this.untranslated.push(key);
            term = 'untranslated term: ' + key;
        }
        else {
            if (Browser.Platform['mac']) {
				// every 'Ctrl +' means control shorthand, so change it to mac incarnation
				term = term.replace(/Ctrl \+/g, 'Cmd +');
			}
        }
        return term;
    },

    getUntranslated: function() {
        return this.untranslated;
    },

    setLocales: function(locales) {
        this.storage = locales;
        for (var i = this.els.length; i--; ) 
			this.localize(this.els[i]);
		this.fireEvent('localize');
    }
});