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Diffstat (limited to 'public/assets/js/vendor/range-touch.js')
| -rw-r--r-- | public/assets/js/vendor/range-touch.js | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/public/assets/js/vendor/range-touch.js b/public/assets/js/vendor/range-touch.js new file mode 100644 index 0000000..92a6be1 --- /dev/null +++ b/public/assets/js/vendor/range-touch.js @@ -0,0 +1,170 @@ +;(function($){ + var touch = {}, + touchTimeout, tapTimeout, swipeTimeout, longTapTimeout, + longTapDelay = 750, gesture; + + function swipeDirection(x1, x2, y1, y2) { + return Math.abs(x1 - x2) >= + Math.abs(y1 - y2) ? (x1 - x2 > 0 ? 'Left' : 'Right') : (y1 - y2 > 0 ? 'Up' : 'Down') + } + + function longTap() { + longTapTimeout = null + if (touch.last) { + touch.el.trigger('longTap') + touch = {} + } + } + + function cancelLongTap() { + if (longTapTimeout) clearTimeout(longTapTimeout) + longTapTimeout = null + } + + function cancelAll() { + if (touchTimeout) clearTimeout(touchTimeout) + if (tapTimeout) clearTimeout(tapTimeout) + if (swipeTimeout) clearTimeout(swipeTimeout) + if (longTapTimeout) clearTimeout(longTapTimeout) + touchTimeout = tapTimeout = swipeTimeout = longTapTimeout = null + touch = {} + } + + function isPrimaryTouch(event){ + return (event.pointerType == 'touch' || + event.pointerType == event.MSPOINTER_TYPE_TOUCH) + && event.isPrimary + } + + function isPointerEventType(e, type){ + return (e.type == 'pointer'+type || + e.type.toLowerCase() == 'mspointer'+type) + } + + function extractTouchesFromEvent(e) { + return (e.touches || e.originalEvent.touches) + } + + $(document).ready(function(){ + var now, delta, deltaX = 0, deltaY = 0, firstTouch, _isPointerType + + if ('MSGesture' in window) { + gesture = new MSGesture() + gesture.target = document.body + } + + $(document) + .bind('MSGestureEnd', function(e){ + var swipeDirectionFromVelocity = + e.velocityX > 1 ? 'Right' : e.velocityX < -1 ? 'Left' : e.velocityY > 1 ? 'Down' : e.velocityY < -1 ? 'Up' : null; + if (swipeDirectionFromVelocity) { + touch.el.trigger('swipe') + touch.el.trigger('swipe'+ swipeDirectionFromVelocity) + } + }) + .on('touchstart MSPointerDown pointerdown', function(e){ + if((_isPointerType = isPointerEventType(e, 'down')) && + !isPrimaryTouch(e)) return + + var touchList = extractTouchesFromEvent(e) + + firstTouch = _isPointerType ? e : touchList[0] + if (touchList && touchList.length === 1 && touch.x2) { + // Clear out touch movement data if we have it sticking around + // This can occur if touchcancel doesn't fire due to preventDefault, etc. + touch.x2 = undefined + touch.y2 = undefined + } + now = Date.now() + delta = now - (touch.last || now) + touch.el = $('tagName' in firstTouch.target ? + firstTouch.target : firstTouch.target.parentNode) + touchTimeout && clearTimeout(touchTimeout) + touch.x1 = firstTouch.pageX + touch.y1 = firstTouch.pageY + if (delta > 0 && delta <= 250) touch.isDoubleTap = true + touch.last = now + longTapTimeout = setTimeout(longTap, longTapDelay) + // adds the current touch contact for IE gesture recognition + if (gesture && _isPointerType) gesture.addPointer(e.pointerId); + }) + .on('touchmove MSPointerMove pointermove', function(e){ + if((_isPointerType = isPointerEventType(e, 'move')) && + !isPrimaryTouch(e)) return + + var touchList = extractTouchesFromEvent(e) + + firstTouch = _isPointerType ? e : touchList[0] + cancelLongTap() + touch.x2 = firstTouch.pageX + touch.y2 = firstTouch.pageY + + deltaX += Math.abs(touch.x1 - touch.x2) + deltaY += Math.abs(touch.y1 - touch.y2) + }) + .on('touchend MSPointerUp pointerup', function(e){ + if((_isPointerType = isPointerEventType(e, 'up')) && + !isPrimaryTouch(e)) return + cancelLongTap() + + // swipe + if ((touch.x2 && Math.abs(touch.x1 - touch.x2) > 30) || + (touch.y2 && Math.abs(touch.y1 - touch.y2) > 30)) + + swipeTimeout = setTimeout(function() { + touch.el.trigger('swipe') + touch.el.trigger('swipe' + (swipeDirection(touch.x1, touch.x2, touch.y1, touch.y2))) + touch = {} + }, 0) + + // normal tap + else if ('last' in touch) + // don't fire tap when delta position changed by more than 30 pixels, + // for instance when moving to a point and back to origin + if (deltaX < 30 && deltaY < 30) { + // delay by one tick so we can cancel the 'tap' event if 'scroll' fires + // ('tap' fires before 'scroll') + tapTimeout = setTimeout(function() { + + // trigger universal 'tap' with the option to cancelTouch() + // (cancelTouch cancels processing of single vs double taps for faster 'tap' response) + var event = $.Event('tap') + event.cancelTouch = cancelAll + touch.el.trigger(event) + + // trigger double tap immediately + if (touch.isDoubleTap) { + if (touch.el) touch.el.trigger('doubleTap') + touch = {} + } + + // trigger single tap after 250ms of inactivity + else { + touchTimeout = setTimeout(function(){ + touchTimeout = null + if (touch.el) touch.el.trigger('singleTap') + touch = {} + }, 250) + } + }, 0) + } else { + touch = {} + } + deltaX = deltaY = 0 + + }) + // when the browser window loses focus, + // for example when a modal dialog is shown, + // cancel all ongoing events + .on('touchcancel MSPointerCancel pointercancel', cancelAll) + + // scrolling the window indicates intention of the user + // to scroll, not tap or swipe, so cancel all ongoing events + $(window).on('scroll', cancelAll) + }) + + ;['swipe', 'swipeLeft', 'swipeRight', 'swipeUp', 'swipeDown', + 'doubleTap', 'tap', 'singleTap', 'longTap'].forEach(function(eventName){ + $.fn[eventName] = function(callback){ return this.on(eventName, callback) } + }) +})(window.$) // based on: https://raw.github.com/madrobby/zepto/master/src/touch.js
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