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Fix smooth scroll issue.

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This commit is contained in:
Kris Maglione
2011-09-29 15:17:39 -04:00
parent 6ebda9b918
commit a1432a07de
1 changed files with 24 additions and 27 deletions
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51
common/content/buffer.js
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@@ -1345,31 +1345,30 @@ var Buffer = Module("buffer", {
* Like scrollTo, but scrolls more smoothly and does not update
* marks.
*/
smoothScrollTo: function smoothScrollTo(elem, x, y) {
smoothScrollTo: function smoothScrollTo(node, x, y) {
let time = options["scrolltime"];
let steps = options["scrollsteps"];
let data = elem;
elem = Buffer.Scrollable(elem);
let elem = Buffer.Scrollable(node);
if (data.dactylScrollTimer)
data.dactylScrollTimer.cancel();
if (node.dactylScrollTimer)
node.dactylScrollTimer.cancel();
x = data.dactylScrollDestX = Math.min(x, elem.scrollWidth - elem.clientWidth);
y = data.dactylScrollDestY = Math.min(y, elem.scrollHeight - elem.clientHeight);
x = node.dactylScrollDestX = Math.min(x, elem.scrollWidth - elem.clientWidth);
y = node.dactylScrollDestY = Math.min(y, elem.scrollHeight - elem.clientHeight);
let [startX, startY] = [elem.scrollLeft, elem.scrollTop];
let n = 0;
(function next() {
if (n++ === steps) {
elem.scrollLeft = x;
elem.scrollTop = y;
delete data.dactylScrollDestX;
delete data.dactylScrollDestY;
delete node.dactylScrollDestX;
delete node.dactylScrollDestY;
}
else {
elem.scrollLeft = startX + (x - startX) / steps * n;
elem.scrollTop = startY + (y - startY) / steps * n;
data.dactylScrollTimer = util.timeout(next, time / steps);
node.dactylScrollTimer = util.timeout(next, time / steps);
}
}).call(this);
},
@@ -1386,11 +1385,10 @@ var Buffer = Module("buffer", {
* @throws {FailedAssertion} if scrolling is not possible in the
* given direction.
*/
scrollHorizontal: function scrollHorizontal(elem, unit, number) {
let fontSize = parseInt(DOM(elem).style.fontSize);
scrollHorizontal: function scrollHorizontal(node, unit, number) {
let fontSize = parseInt(DOM(node).style.fontSize);
let data = elem;
elem = Buffer.Scrollable(elem);
let elem = Buffer.Scrollable(node);
let increment;
if (unit == "columns")
increment = fontSize; // Good enough, I suppose.
@@ -1401,10 +1399,10 @@ var Buffer = Module("buffer", {
dactyl.assert(number < 0 ? elem.scrollLeft > 0 : elem.scrollLeft < elem.scrollWidth - elem.clientWidth);
let left = data.dactylScrollDestX !== undefined ? data.dactylScrollDestX : elem.scrollLeft;
data.dactylScrollDestX = undefined;
let left = node.dactylScrollDestX !== undefined ? node.dactylScrollDestX : elem.scrollLeft;
node.dactylScrollDestX = undefined;
Buffer.scrollTo(elem, left + number * increment, null, "h-" + unit);
Buffer.scrollTo(node, left + number * increment, null, "h-" + unit);
},
/**
@@ -1419,11 +1417,10 @@ var Buffer = Module("buffer", {
* @throws {FailedAssertion} if scrolling is not possible in the
* given direction.
*/
scrollVertical: function scrollVertical(elem, unit, number) {
let fontSize = parseInt(DOM(elem).style.lineHeight);
scrollVertical: function scrollVertical(node, unit, number) {
let fontSize = parseInt(DOM(node).style.lineHeight);
let data = elem;
elem = Buffer.Scrollable(elem);
let elem = Buffer.Scrollable(node);
let increment;
if (unit == "lines")
increment = fontSize;
@@ -1434,10 +1431,10 @@ var Buffer = Module("buffer", {
dactyl.assert(number < 0 ? elem.scrollTop > 0 : elem.scrollTop < elem.scrollHeight - elem.clientHeight);
let top = data.dactylScrollDestY !== undefined ? data.dactylScrollDestY : elem.scrollTop;
data.dactylScrollDestY = undefined;
let top = node.dactylScrollDestY !== undefined ? node.dactylScrollDestY : elem.scrollTop;
node.dactylScrollDestY = undefined;
Buffer.scrollTo(elem, null, top + number * increment, "v-" + unit);
Buffer.scrollTo(node, null, top + number * increment, "v-" + unit);
},
/**
@@ -1452,9 +1449,9 @@ var Buffer = Module("buffer", {
* of the current viewport height to scroll to. If null, do not
* scroll vertically.
*/
scrollToPercent: function scrollToPercent(elem, horizontal, vertical) {
elem = Buffer.Scrollable(elem);
Buffer.scrollTo(elem,
scrollToPercent: function scrollToPercent(node, horizontal, vertical) {
let elem = Buffer.Scrollable(node);
Buffer.scrollTo(node,
horizontal == null ? null
: (elem.scrollWidth - elem.clientWidth) * (horizontal / 100),
vertical == null ? null