return getPosition();
};
- // Bounce back to the bounds after momentum scrolling
- function reboundScroll() {
- if (scrollY > 0) {
- scrollTo(0, o.reboundTime);
- } else if (scrollY < maxHeight) {
- scrollTo(maxHeight, o.reboundTime);
- }
+ // Bounce back to the bounds after momentum scrolling
+ function reboundScroll() {
+ if (scrollY > 0) {
+ scrollTo(0, o.reboundTime);
+ } else if (scrollY < maxHeight) {
+ scrollTo(maxHeight, o.reboundTime);
}
+ }
- // Stop everything once the CSS transition in complete
- function transitionEnd() {
- if (bouncing) {
- bouncing = false;
- reboundScroll();
- }
+ // Stop everything once the CSS transition in complete
+ function transitionEnd() {
+ if (bouncing) {
+ bouncing = false;
+ reboundScroll();
+ }
- clearTimeout(timeoutID);
+ clearTimeout(timeoutID);
+ }
+
+ // Limit the scrolling to within the bounds
+ function clampScroll(poll) {
+ if (!hasMatrix || bouncing) {
+ return;
}
+
+ var oldY = pollY;
+ pollY = getPosition();
- // Limit the scrolling to within the bounds
- function clampScroll(poll) {
- if (!hasMatrix || bouncing) {
- return;
+ if (pollY > 0) {
+ if (o.elastic) {
+ // Slow down outside top bound
+ bouncing = true;
+ scrollY = 0;
+ momentumScroll(pollY - oldY, o.elasticDamp, 1, height, o.elasticTime);
+ } else {
+ // Stop outside top bound
+ setTransitionTime(0);
+ setPosition(0);
}
-
- var oldY = pollY;
- pollY = getPosition();
-
- if (pollY > 0) {
- if (o.elastic) {
- // Slow down outside top bound
- bouncing = true;
- scrollY = 0;
- momentumScroll(pollY - oldY, o.elasticDamp, 1, height, o.elasticTime);
- } else {
- // Stop outside top bound
- setTransitionTime(0);
- setPosition(0);
- }
- } else if (pollY < maxHeight) {
- if (o.elastic) {
- // Slow down outside bottom bound
- bouncing = true;
- scrollY = maxHeight;
- momentumScroll(pollY - oldY, o.elasticDamp, 1, height, o.elasticTime);
- } else {
- // Stop outside bottom bound
- setTransitionTime(0);
- setPosition(maxHeight);
- }
- } else if (poll) {
- // Poll the computed position to check if element is out of bounds
- timeoutID = setTimeout(clampScroll, 20, true);
+ } else if (pollY < maxHeight) {
+ if (o.elastic) {
+ // Slow down outside bottom bound
+ bouncing = true;
+ scrollY = maxHeight;
+ momentumScroll(pollY - oldY, o.elasticDamp, 1, height, o.elasticTime);
+ } else {
+ // Stop outside bottom bound
+ setTransitionTime(0);
+ setPosition(maxHeight);
}
+ } else if (poll) {
+ // Poll the computed position to check if element is out of bounds
+ timeoutID = setTimeout(clampScroll, 20, true);
+ }
+ }
+
+ // Animate to a position using CSS
+ function scrollTo(destY, time) {
+ if (destY === scrollY) {
+ return;
}
- // Animate to a position using CSS
- function scrollTo(destY, time) {
- if (destY === scrollY) {
- return;
- }
-
- moved = true;
- setTransitionTime(time);
- setPosition(destY);
+ moved = true;
+ setTransitionTime(time);
+ setPosition(destY);
+ }
+
+ // Perform a momentum-based scroll using CSS
+ function momentumScroll(d, k, minDist, maxDist, t) {
+ var ad = Math.abs(d),
+ dy = 0;
+
+ // Calculate the total distance
+ while (ad > 0.1) {
+ ad *= k;
+ dy += ad;
}
- // Perform a momentum-based scroll using CSS
- function momentumScroll(d, k, minDist, maxDist, t) {
- var ad = Math.abs(d),
- dy = 0;
-
- // Calculate the total distance
- while (ad > 0.1) {
- ad *= k;
- dy += ad;
- }
-
- // Limit to within min and max distances
- if (dy > maxDist) {
- dy = maxDist;
+ // Limit to within min and max distances
+ if (dy > maxDist) {
+ dy = maxDist;
+ }
+ if (dy > minDist) {
+ if (d < 0) {
+ dy = -dy;
}
- if (dy > minDist) {
- if (d < 0) {
- dy = -dy;
- }
-
- dy += scrollY;
-
- // If outside the bounds, don't go too far
- if (height > 0) {
- if (dy > height * 2) {
- var ody = dy;
- dy = height * 2;
- } else if (dy < maxHeight - height * 2) {
- dy = maxHeight - height * 2;
- }
- }
- // Perform scroll
- scrollTo(Math.round(dy), t);
- }
+ dy += scrollY;
- clampScroll(true);
- }
-
- // Get the touch points from this event
- function getTouches(e) {
- if (e.originalEvent) {
- if (e.originalEvent.touches && e.originalEvent.touches.length) {
- return e.originalEvent.touches;
- } else if (e.originalEvent.changedTouches && e.originalEvent.changedTouches.length) {
- return e.originalEvent.changedTouches;
+ // If outside the bounds, don't go too far
+ if (height > 0) {
+ if (dy > height * 2) {
+ var ody = dy;
+ dy = height * 2;
+ } else if (dy < maxHeight - height * 2) {
+ dy = maxHeight - height * 2;
}
}
- return e.touches;
- }
- // Dispatches a fake mouse event from a touch event
- function dispatchMouseEvent(name, touch, target) {
- var e = document.createEvent('MouseEvent');
- e.initMouseEvent(name, true, true, touch.view, 1, touch.screenX, touch.screenY, touch.clientX, touch.clientY, false, false, false, false, 0, null);
- target.dispatchEvent(e);
+ // Perform scroll
+ scrollTo(Math.round(dy), t);
}
- // Find the root node of this target
- function getRootNode(target) {
- while (target.nodeType !== 1) {
- target = target.parentNode;
+ clampScroll(true);
+ }
+
+ // Get the touch points from this event
+ function getTouches(e) {
+ if (e.originalEvent) {
+ if (e.originalEvent.touches && e.originalEvent.touches.length) {
+ return e.originalEvent.touches;
+ } else if (e.originalEvent.changedTouches && e.originalEvent.changedTouches.length) {
+ return e.originalEvent.changedTouches;
}
- return target;
}
-
- // Perform a touch start event
- function touchStart(e) {
- // Allow certain HTML tags to receive touch events
- if ($.inArray(e.target.tagName.toLowerCase(), o.touchTags) !== -1) {
- return;
- }
-
- // Stop the default touches
- e.preventDefault();
- e.stopPropagation();
-
- var touch = getTouches(e)[0];
-
- // Dispatch a fake mouse down event
- dispatchMouseEvent('mousedown', touch, getRootNode(touch.target));
-
- scrolling = true;
- moved = false;
- movedY = 0;
-
- clearTimeout(timeoutID);
- setTransitionTime(0);
-
- // Check scroll position
- if (o.momentum) {
- var y = getPosition();
- if (y !== scrollY) {
- setPosition(y);
- moved = true;
- }
- }
+ return e.touches;
+ }
+
+ // Dispatches a fake mouse event from a touch event
+ function dispatchMouseEvent(name, touch, target) {
+ var e = document.createEvent('MouseEvent');
+ e.initMouseEvent(name, true, true, touch.view, 1,
+ touch.screenX, touch.screenY,
+ touch.clientX, touch.clientY,
+ false, false, false, false, 0, null);
+ target.dispatchEvent(e);
+ }
+
+ // Find the root node of this target
+ function getRootNode(target) {
+ while (target.nodeType !== 1) {
+ target = target.parentNode;
+ }
+ return target;
+ }
+
+ // Perform a touch start event
+ function touchStart(e) {
+ // Allow certain HTML tags to receive touch events
+ if (o.touchTags.indexOf(e.target.tagName.toLowerCase()) !== -1) {
+ return;
+ }
+
+ // Stop the default touches
+ e.preventDefault();
+ e.stopPropagation();
+
+ var touch = getTouches(e)[0];
+
+ // Dispatch a fake mouse down event
+ dispatchMouseEvent('mousedown', touch, getRootNode(touch.target));
+
+ scrolling = true;
+ moved = false;
+ movedY = 0;
+
+ clearTimeout(timeoutID);
+ setTransitionTime(0);
+
+ // Check scroll position
+ if (o.momentum) {
+ var y = getPosition();
+ if (y !== scrollY) {
+ setPosition(y);
+ moved = true;
+ }
+ }
- touchY = touch.pageY - scrollY;
+ touchY = touch.pageY - scrollY;
+ }
+
+ // Perform a touch move event
+ function touchMove(e) {
+ if (!scrolling) {
+ return;
}
- // Perform a touch move event
- function touchMove(e) {
- if (!scrolling) {
- return;
+ var dy = getTouches(e)[0].pageY - touchY;
+
+ // Elastic-drag or stop when moving outside of boundaries
+ if (dy > 0) {
+ if (o.elastic) {
+ dy /= 2;
+ } else {
+ dy = 0;
}
-
- var dy = getTouches(e)[0].pageY - touchY;
-
- // Elastic-drag or stop when moving outside of boundaries
- if (dy > 0) {
- if (o.elastic) {
- dy /= 2;
- } else {
- dy = 0;
- }
- } else if (dy < maxHeight) {
- if (o.elastic) {
- dy = (dy + maxHeight) / 2;
- } else {
- dy = maxHeight;
- }
+ } else if (dy < maxHeight) {
+ if (o.elastic) {
+ dy = (dy + maxHeight) / 2;
+ } else {
+ dy = maxHeight;
}
-
- movedY = dy - scrollY;
- moved = true;
- setPosition(dy);
}
+ movedY = dy - scrollY;
+ moved = true;
+ setPosition(dy);
+ }
+
// Perform a touch end event
function touchEnd(e) {
if (!scrolling) {
projects / roojs1 / commitdiff