/*
 * jquery.simulate - simulate browser mouse and keyboard events
 *
 * Copyright (c) 2009 Eduardo Lundgren (eduardolundgren@gmail.com)
 * and Richard D. Worth (rdworth@gmail.com)
 *
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 */

(function($) {

$.fn.extend({
        simulate: function(type, options) {
                return this.each(function() {
                        var opt = $.extend({}, $.simulate.defaults, options || {});
                        new $.simulate(this, type, opt);
                });
        }
});

$.simulate = function(el, type, options) {
        this.target = el;
        this.options = options;

        if (/^drag$/.test(type)) {
                this[type].apply(this, [this.target, options]);
        } else {
                this.simulateEvent(el, type, options);
        }
}

$.extend($.simulate.prototype, {
        simulateEvent: function(el, type, options) {
                var evt = this.createEvent(type, options);
                this.dispatchEvent(el, type, evt, options);
                return evt;
        },
        createEvent: function(type, options) {
                if (/^mouse(over|out|down|up|move)|(dbl)?click$/.test(type)) {
                        return this.mouseEvent(type, options);
                } else if (/^key(up|down|press)$/.test(type)) {
                        return this.keyboardEvent(type, options);
                }
        },
        mouseEvent: function(type, options) {
                var evt;
                var e = $.extend({
                        bubbles: true, cancelable: (type != "mousemove"), view: window, detail: 0,
                        screenX: 0, screenY: 0, clientX: 0, clientY: 0,
                        ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
                        button: 0, relatedTarget: undefined
                }, options);

                var relatedTarget = $(e.relatedTarget)[0];

                if ($.isFunction(document.createEvent)) {
                        evt = document.createEvent("MouseEvents");
                        evt.initMouseEvent(type, e.bubbles, e.cancelable, e.view, e.detail,
                                e.screenX, e.screenY, e.clientX, e.clientY,
                                e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
                                e.button, e.relatedTarget || document.body.parentNode);
                } else if (document.createEventObject) {
                        evt = document.createEventObject();
                        $.extend(evt, e);
                        evt.button = { 0:1, 1:4, 2:2 }[evt.button] || evt.button;
                }
                return evt;
        },
        keyboardEvent: function(type, options) {
                var evt;

                var e = $.extend({ bubbles: true, cancelable: true, view: window,
                        ctrlKey: false, altKey: false, shiftKey: false, metaKey: false,
                        keyCode: 0, charCode: 0
                }, options);

                if ($.isFunction(document.createEvent)) {
                        try {
                                evt = document.createEvent("KeyEvents");
                                evt.initKeyEvent(type, e.bubbles, e.cancelable, e.view,
                                        e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
                                        e.keyCode, e.charCode);
                        } catch(err) {
                                evt = document.createEvent("Events");
                                evt.initEvent(type, e.bubbles, e.cancelable);
                                $.extend(evt, { view: e.view,
                                        ctrlKey: e.ctrlKey, altKey: e.altKey, shiftKey: e.shiftKey, metaKey: e.metaKey,
                                        keyCode: e.keyCode, charCode: e.charCode
                                });
                        }
                } else if (document.createEventObject) {
                        evt = document.createEventObject();
                        $.extend(evt, e);
                }
                if ($.browser.msie || $.browser.opera) {
                        evt.keyCode = (e.charCode > 0) ? e.charCode : e.keyCode;
                        evt.charCode = undefined;
                }
                return evt;
        },

        dispatchEvent: function(el, type, evt) {
                if (el.dispatchEvent) {
                        el.dispatchEvent(evt);
                } else if (el.fireEvent) {
                        el.fireEvent('on' + type, evt);
                }
                return evt;
        },

        drag: function(el) {
                var self = this, center = this.findCenter(this.target), 
                        options = this.options, x = Math.floor(center.x), y = Math.floor(center.y), 
                        dx = options.dx || 0, dy = options.dy || 0, target = this.target;
                var coord = { clientX: x, clientY: y };
                this.simulateEvent(target, "mousedown", coord);
                coord = { clientX: x + 1, clientY: y + 1 };
                this.simulateEvent(document, "mousemove", coord);
                coord = { clientX: x + dx, clientY: y + dy };
                this.simulateEvent(document, "mousemove", coord);
                this.simulateEvent(document, "mousemove", coord);
                this.simulateEvent(target, "mouseup", coord);
        },
        findCenter: function(el) {
                var el = $(this.target), o = el.offset();
                return {
                        x: o.left + el.outerWidth() / 2,
                        y: o.top + el.outerHeight() / 2
                };
        }
});

$.extend($.simulate, {
        defaults: {
                speed: 'sync'
        },
        VK_TAB: 9,
        VK_ENTER: 13,
        VK_ESC: 27,
        VK_PGUP: 33,
        VK_PGDN: 34,
        VK_END: 35,
        VK_HOME: 36,
        VK_LEFT: 37,
        VK_UP: 38,
        VK_RIGHT: 39,
        VK_DOWN: 40
});

})(jQuery);