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Improve syncscroll performance and accuracy with few UX tweaks

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This commit is contained in:
Cheng-Han, Wu 2016-05-29 13:58:32 +08:00
parent 20fbc9957f
commit 2c60f0dd67
2 changed files with 64 additions and 60 deletions
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34
public/js/index.js
View file

@ -713,6 +713,14 @@ $(window).error(function () {
//setNeedRefresh();
});
function autoSyncscroll() {
if (editorHasFocus()) {
syncScrollToView();
} else {
syncScrollToEdit();
}
}
var windowResizeDebounce = 200;
var windowResize = _.debounce(windowResizeInner, windowResizeDebounce);
@ -727,11 +735,7 @@ function windowResizeInner(callback) {
if (editor.getOption('scrollbarStyle') === 'native') {
setTimeout(function () {
clearMap();
if (editorHasFocus()) {
syncScrollToView();
} else {
syncScrollToEdit();
}
autoSyncscroll();
updateScrollspy();
if (callback && typeof callback === 'function')
callback();
@ -741,11 +745,7 @@ function windowResizeInner(callback) {
editor.setOption('viewportMargin', Infinity);
setTimeout(function () {
clearMap();
if (editorHasFocus()) {
syncScrollToView();
} else {
syncScrollToEdit();
}
autoSyncscroll();
editor.setOption('viewportMargin', viewportMargin);
//add or update user cursors
for (var i = 0; i < onlineUsers.length; i++) {
@ -1029,12 +1029,12 @@ function changeMode(type) {
if (lastMode == modeType.view && currentMode == modeType.both) {
preventSyncScrollToView = 2;
syncScrollToEdit();
syncScrollToEdit(null, true);
}
if (lastMode == modeType.edit && currentMode == modeType.both) {
preventSyncScrollToEdit = 2;
syncScrollToView();
syncScrollToView(null, true);
}
if (lastMode == modeType.both && currentMode != modeType.both) {
@ -2458,10 +2458,10 @@ editor.on('beforeChange', function (cm, change) {
cmClient.editorAdapter.ignoreNextChange = true;
});
editor.on('cut', function () {
windowResize(); //workaround for scrollMap
//na
});
editor.on('paste', function () {
windowResize(); //workaround for scrollMap
//na
});
editor.on('changes', function (cm, changes) {
updateHistory();
@ -2630,11 +2630,7 @@ function updateViewInner() {
clearMap();
//buildMap();
updateTitleReminder();
if (editorHasFocus()) {
syncScrollToView();
} else {
syncScrollToEdit();
}
autoSyncscroll();
}
var updateHistoryDebounce = 600;

90
public/js/syncscroll.js
View file

@ -110,7 +110,7 @@ var syncscroll = true;
var preventSyncScrollToEdit = false;
var preventSyncScrollToView = false;
var editScrollThrottle = 2;
var editScrollThrottle = 10;
var viewScrollThrottle = 10;
var buildMapThrottle = 100;
@ -214,7 +214,7 @@ function buildMapInner(callback) {
// sync view scroll progress to edit
var viewScrollingTimer = null;
function syncScrollToEdit(e) {
function syncScrollToEdit(event, preventAnimate) {
if (currentMode != modeType.both || !syncscroll) return;
if (preventSyncScrollToEdit) {
if (typeof preventSyncScrollToEdit === 'number') {
@ -225,7 +225,9 @@ function syncScrollToEdit(e) {
return;
}
if (!scrollMap || !lineHeightMap) {
buildMap(syncScrollToEdit);
buildMap(function () {
syncScrollToEdit(event, preventAnimate);
});
return;
}
if (editScrolling) return;
@ -263,24 +265,28 @@ function syncScrollToEdit(e) {
posTo = preLastLineHeight;
topDiffPercent = (scrollTop - preLastLinePos) / (viewBottom - preLastLinePos);
posToNextDiff = textHeight * topDiffPercent;
posTo += Math.floor(posToNextDiff);
posTo += Math.ceil(posToNextDiff);
} else {
posTo = lineNo * textHeight;
topDiffPercent = (scrollTop - scrollMap[lineNo]) / (scrollMap[lineNo + lineDiff] - scrollMap[lineNo]);
posToNextDiff = textHeight * lineDiff * topDiffPercent;
posTo += Math.floor(posToNextDiff);
posTo += Math.ceil(posToNextDiff);
}
var posDiff = Math.abs(scrollInfo.top - posTo);
var duration = posDiff / 50;
duration = duration >= 100 ? duration : 100;
ui.area.codemirrorScroll.stop(true, true).animate({
scrollTop: posTo
}, duration, "linear");
if (preventAnimate) {
ui.area.codemirrorScroll.scrollTop(posTo);
} else {
var posDiff = Math.abs(scrollInfo.top - posTo);
var duration = posDiff / 50;
duration = duration >= 100 ? duration : 100;
ui.area.codemirrorScroll.stop(true, true).animate({
scrollTop: posTo
}, duration, "linear");
}
viewScrolling = true;
clearTimeout(viewScrollingTimer);
viewScrollingTimer = setTimeout(viewScrollingTimeoutInner, duration * 1.2);
viewScrollingTimer = setTimeout(viewScrollingTimeoutInner, duration * 1.5);
}
function viewScrollingTimeoutInner() {
@ -290,7 +296,7 @@ function viewScrollingTimeoutInner() {
// sync edit scroll progress to view
var editScrollingTimer = null;
function syncScrollToView(event, _lineNo) {
function syncScrollToView(event, preventAnimate) {
if (currentMode != modeType.both || !syncscroll) return;
if (preventSyncScrollToView) {
if (typeof preventSyncScrollToView === 'number') {
@ -301,44 +307,46 @@ function syncScrollToView(event, _lineNo) {
return;
}
if (!scrollMap || !lineHeightMap) {
buildMap(syncScrollToView);
buildMap(function () {
syncScrollToView(event, preventAnimate);
});
return;
}
if (viewScrolling) return;
if (!_lineNo) {
var lineNo, posTo;
var topDiffPercent, posToNextDiff;
var scrollInfo = editor.getScrollInfo();
var textHeight = editor.defaultTextHeight();
lineNo = Math.floor(scrollInfo.top / textHeight);
// if reach the last line, will start lerp to the bottom
var diffToBottom = (scrollInfo.top + scrollInfo.clientHeight) - (scrollInfo.height - textHeight);
if (scrollInfo.height > scrollInfo.clientHeight && diffToBottom > 0) {
topDiffPercent = diffToBottom / textHeight;
posTo = scrollMap[lineNo + 1];
posToNextDiff = (viewBottom - posTo) * topDiffPercent;
posTo += Math.floor(posToNextDiff);
} else {
topDiffPercent = (scrollInfo.top % textHeight) / textHeight;
posTo = scrollMap[lineNo];
posToNextDiff = (scrollMap[lineNo + 1] - posTo) * topDiffPercent;
posTo += Math.floor(posToNextDiff);
}
var lineNo, posTo;
var topDiffPercent, posToNextDiff;
var scrollInfo = editor.getScrollInfo();
var textHeight = editor.defaultTextHeight();
lineNo = Math.floor(scrollInfo.top / textHeight);
// if reach the last line, will start lerp to the bottom
var diffToBottom = (scrollInfo.top + scrollInfo.clientHeight) - (scrollInfo.height - textHeight);
if (scrollInfo.height > scrollInfo.clientHeight && diffToBottom > 0) {
topDiffPercent = diffToBottom / textHeight;
posTo = scrollMap[lineNo + 1];
posToNextDiff = (viewBottom - posTo) * topDiffPercent;
posTo += Math.floor(posToNextDiff);
} else {
posTo = scrollMap[lineHeightMap[_lineNo]];
topDiffPercent = (scrollInfo.top % textHeight) / textHeight;
posTo = scrollMap[lineNo];
posToNextDiff = (scrollMap[lineNo + 1] - posTo) * topDiffPercent;
posTo += Math.floor(posToNextDiff);
}
var posDiff = Math.abs(ui.area.view.scrollTop() - posTo);
var duration = posDiff / 50;
duration = duration >= 100 ? duration : 100;
ui.area.view.stop(true, true).animate({
scrollTop: posTo
}, duration, "linear");
if (preventAnimate) {
ui.area.view.scrollTop(posTo);
} else {
var posDiff = Math.abs(ui.area.view.scrollTop() - posTo);
var duration = posDiff / 50;
duration = duration >= 100 ? duration : 100;
ui.area.view.stop(true, true).animate({
scrollTop: posTo
}, duration, "linear");
}
editScrolling = true;
clearTimeout(editScrollingTimer);
editScrollingTimer = setTimeout(editScrollingTimeoutInner, duration * 1.2);
editScrollingTimer = setTimeout(editScrollingTimeoutInner, duration * 1.5);
}
function editScrollingTimeoutInner() {