jquery.tap.js

/**
 * From https://github.com/jonpacker/jquery.tap
 * The only difference is that the mapping to click events is deleted. Lines 71-73
 */

;(function($, undefined) {
    'use strict';
    var incrementalElementId = 0,
    mutex = 0;
    $.fn.tap = function(threshold, callback) {
        if (typeof threshold === 'function') {
            callback = threshold;
            threshold = 15;
        }
        if ('ontouchstart' in window) {
            this.each(function() {
                var moveDistance = 0,
                    touch = null,
                    elementId = ++incrementalElementId,
                    startPoint = null,
                    touching = false,
                    self = this,
                    $self = $(this);

                $self.bind('touchstart', function(e) {
                    if (mutex !== 0) {return;}
                    else {mutex = elementId;}

                    touching = true;
                    moveDistance = 0;

                    if (e.originalEvent.touches && e.originalEvent.touches[0]) {
                        touch = e.originalEvent.touches[0];
                        startPoint = { x: touch.screenX, y: touch.screenY };
                    }
                });

                $self.bind('touchend', function() {
                    if (mutex === elementId) {mutex = 0;}
                    if (!touching) {return;}
                    touching = false;
                    if (moveDistance < threshold) {
                        callback.apply(self, [].slice.call(arguments));
                    } else {
                        $self.trigger('tap-failed');
                    }
                });

                $self.bind('touchmove', function(e) {
                    if (!touching) {return;}
                    if (e.originalEvent.touches.length === 0 || startPoint === null) {
                        return touching = false;
                    }

                    touch = e.originalEvent.touches[0];

                    moveDistance = Math.sqrt(Math.pow(touch.screenX - startPoint.x, 2) +
                                           Math.pow(touch.screenY - startPoint.y, 2));

                    if (moveDistance > threshold) {
                        $self.trigger('exceed-tap-threshold');
                        touching = false;
                    }
                });

                $self.bind('touchcancel', function() {
                    if (mutex === elementId) {mutex = 0;}
                    touching = false;
                    $self.trigger('tap-failed');
                });
            });
        }/* else {
            this.click(callback);
        }*/
        return this;
    };
})(window.jQuery || window.$);