Function make_callback_plugin

js/jquery.terminal-src.js:987–1038

(options)

    // :: callback based event handler plugin generator
    // -----------------------------------------------------------------------
    function make_callback_plugin(options) {
        var factory_settings = $.extend({
            init: $.noop,
            destroy: $.noop,
            name: 'event'
        }, options);
        return function(callback, options) {
            var trigger = arguments.length === 0;
            var unbind = arguments[0] === "unbind";
            if (!trigger && !unbind && !is_function(callback)) {
                throw new Error('Invalid argument, it need to a function or string ' +
                                '"unbind" or no arguments.');
            }
            if (unbind) {
                callback = is_function(arguments[1]) ? arguments[1] : null;
            }
            var data_name = 'callbacks_' + factory_settings.name;
            return this.each(function() {
                var $this = $(this);
                var callbacks;
                function handler(arg) {
                    callbacks.fireWith($this, [arg]);
                }
                if (trigger || unbind) {
                    callbacks = $this.data(data_name);
                    if (trigger) {
                        callbacks && callbacks.fire();
                    } else {
                        if (callback && callbacks) {
                            callbacks.remove(callback);
                            if (!callbacks.has()) {
                                callbacks = null;
                            }
                        } else {
                            callbacks = null;
                        }
                        if (!callbacks) {
                            $this.removeData(data_name);
                            factory_settings.destroy.call(this, handler, options);
                        }
                    }
                } else if ($this.data(data_name)) {
                    $(this).data(data_name).add(callback);
                } else {
                    callbacks = $.Callbacks();
                    callbacks.add(callback);
                    $this.data(data_name, callbacks);
                    factory_settings.init.call(this, handler, options);
                }
            });
        };
    }
    // -----------------------------------------------------------------------
    // :: Cross-browser resize element plugin using sentinel iframe or
    // :: resizeObserver