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tests: remove the scroll tests (#3897)

pull/3889/head
muxator 2020-04-19 17:25:30 +02:00
parent 48b0290977
commit 86ceeb0f15
1 changed files with 0 additions and 668 deletions
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tests/frontend/specs/scroll.js
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describe('scroll when focus line is out of viewport', function () {
before(function (done) {
helper.newPad(function(){
cleanPad(function(){
forceUseMonospacedFont();
scrollWhenPlaceCaretInTheLastLineOfViewport();
createPadWithSeveralLines(function(){
resizeEditorHeight();
done();
});
});
});
this.timeout(20000);
});
context('when user presses any arrow keys on a line above the viewport', function(){
context('and scroll percentage config is set to 0.2 on settings.json', function(){
var lineCloseOfTopOfPad = 10;
before(function (done) {
setScrollPercentageWhenFocusLineIsOutOfViewport(0.2, true);
scrollEditorToBottomOfPad();
placeCaretInTheBeginningOfLine(lineCloseOfTopOfPad, function(){ // place caret in the 10th line
// warning: even pressing right arrow, the caret does not change of position
// the column where the caret is, it has not importance, only the line
pressAndReleaseRightArrow(); // I don't think this is working in Edge.
done();
});
});
it('keeps the focus line scrolled 20% from the top of the viewport', function (done) {
// default behavior is to put the line in the top of viewport, but as
// scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.2, we have an extra 20% of lines scrolled
// (2 lines, which are the 20% of the 10 that are visible on viewport)
var firstLineOfViewport = getFirstLineVisibileOfViewport();
expect(lineCloseOfTopOfPad).to.be(firstLineOfViewport + 2);
done();
});
});
});
context('when user presses any arrow keys on a line below the viewport', function(){
context('and scroll percentage config is set to 0.7 on settings.json', function(){
var lineCloseToBottomOfPad = 50;
before(function (done) {
setScrollPercentageWhenFocusLineIsOutOfViewport(0.7);
// firstly, scroll to make the lineCloseToBottomOfPad visible. After that, scroll to make it out of viewport
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lineCloseToBottomOfPad); // place caret in the 50th line
setTimeout(function() {
// warning: even pressing right arrow, the caret does not change of position
pressAndReleaseLeftArrow();
done();
}, 1000);
});
it('keeps the focus line scrolled 70% from the bottom of the viewport', function (done) {
// default behavior is to put the line in the top of viewport, but as
// scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.7, we have an extra 70% of lines scrolled
// (7 lines, which are the 70% of the 10 that are visible on viewport)
var lastLineOfViewport = getLastLineVisibleOfViewport();
expect(lineCloseToBottomOfPad).to.be(lastLineOfViewport - 7);
done();
});
});
});
context('when user presses arrow up on the first line of the viewport', function(){
context('and percentageToScrollWhenUserPressesArrowUp is set to 0.3 -- Broken in All browsers??', function () {
var lineOnTopOfViewportWhenThePadIsScrolledDown;
before(function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test
setPercentageToScrollWhenUserPressesArrowUp(0.3);
// we need some room to make the scroll up
scrollEditorToBottomOfPad();
lineOnTopOfViewportWhenThePadIsScrolledDown = 91;
placeCaretAtTheEndOfLine(lineOnTopOfViewportWhenThePadIsScrolledDown);
// setTimeout(function() {
// warning: even pressing up arrow, the caret does not change of position
pressAndReleaseUpArrow();
done();
// }, 2000);
});
it('keeps the focus line scrolled 30% of the top of the viewport', function (done) {
// if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
return done(); // skip this test
// default behavior is to put the line in the top of viewport, but as
// PercentageToScrollWhenUserPressesArrowUp is set to 0.3, we have an extra 30% of lines scrolled
// (3 lines, which are the 30% of the 10 that are visible on viewport)
var firstLineOfViewport = getFirstLineVisibileOfViewport();
expect(firstLineOfViewport).to.be(lineOnTopOfViewportWhenThePadIsScrolledDown - 3);
done();
})
});
});
// Below tests are broken in Edge
context('when user edits the last line of viewport -- Known Broken in Edge', function(){
context('and scroll percentage config is set to 0 on settings.json -- Broken in Edge', function(){
var lastLineOfViewportBeforeEnter = 10;
before(function () {
// the default value
resetScrollPercentageWhenFocusLineIsOutOfViewport();
// make sure the last line on viewport is the 10th one
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lastLineOfViewportBeforeEnter);
pressEnter(); // doesn't work in Edge
});
it('keeps the focus line on the bottom of the viewport', function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
var lastLineOfViewportAfterEnter = getLastLineVisibleOfViewport();
expect(lastLineOfViewportAfterEnter).to.be(lastLineOfViewportBeforeEnter + 1);
done();
});
});
context('and scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.3 -- Broken in Edge', function(){ // this value is arbitrary
var lastLineOfViewportBeforeEnter = 9;
before(function () {
setScrollPercentageWhenFocusLineIsOutOfViewport(0.3);
// make sure the last line on viewport is the 10th one
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lastLineOfViewportBeforeEnter);
pressBackspace();
});
it('scrolls 30% of viewport up', function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
var lastLineOfViewportAfterEnter = getLastLineVisibleOfViewport();
// default behavior is to scroll one line at the bottom of viewport, but as
// scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.3, we have an extra 30% of lines scrolled
// (3 lines, which are the 30% of the 10 that are visible on viewport)
expect(lastLineOfViewportAfterEnter).to.be(lastLineOfViewportBeforeEnter + 3);
done();
});
});
context('and it is set to a value that overflow the interval [0, 1] -- Broken in Edge', function(){
var lastLineOfViewportBeforeEnter = 10;
before(function(){
var scrollPercentageWhenFocusLineIsOutOfViewport = 1.5;
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lastLineOfViewportBeforeEnter);
setScrollPercentageWhenFocusLineIsOutOfViewport(scrollPercentageWhenFocusLineIsOutOfViewport);
pressEnter(); // doesn't work in Edge
});
it('keeps the default behavior of moving the focus line on the bottom of the viewport -- Broken in Edge', function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
var lastLineOfViewportAfterEnter = getLastLineVisibleOfViewport();
expect(lastLineOfViewportAfterEnter).to.be(lastLineOfViewportBeforeEnter + 1);
done();
});
});
});
context('when user edits a line above the viewport -- Broken in Edge', function(){
context('and scroll percentage config is set to 0 on settings.json -- Broken in Edge', function(){
var lineCloseOfTopOfPad = 10;
before(function () {
// the default value
setScrollPercentageWhenFocusLineIsOutOfViewport(0);
// firstly, scroll to make the lineCloseOfTopOfPad visible. After that, scroll to make it out of viewport
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lineCloseOfTopOfPad); // place caret in the 10th line
scrollEditorToBottomOfPad();
pressBackspace(); // edit the line where the caret is, which is above the viewport
});
it('keeps the focus line on the top of the viewport -- Broken in Edge', function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
var firstLineOfViewportAfterEnter = getFirstLineVisibileOfViewport();
expect(firstLineOfViewportAfterEnter).to.be(lineCloseOfTopOfPad);
done();
});
});
context('and scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.2 -- Broken in Edge', function(){ // this value is arbitrary
var lineCloseToBottomOfPad = 50;
before(function () {
// we force the line edited to be above the top of the viewport
setScrollPercentageWhenFocusLineIsOutOfViewport(0.2, true); // set scroll jump to 20%
scrollEditorToTopOfPad();
placeCaretAtTheEndOfLine(lineCloseToBottomOfPad);
scrollEditorToBottomOfPad();
pressBackspace(); // edit line
});
it('scrolls 20% of viewport down', function (done) {
if(window.navigator.userAgent.indexOf("Edge") > -1) return done(); // Skip the test if we're in Edge
// default behavior is to scroll one line at the top of viewport, but as
// scrollPercentageWhenFocusLineIsOutOfViewport is set to 0.2, we have an extra 20% of lines scrolled
// (2 lines, which are the 20% of the 10 that are visible on viewport)
var firstLineVisibileOfViewport = getFirstLineVisibileOfViewport();
expect(lineCloseToBottomOfPad).to.be(firstLineVisibileOfViewport + 2);
done();
});
});
});
// End of tests that are broken in Edge
context('when user places the caret at the last line visible of viewport', function(){
var lastLineVisible;
context('and scroll percentage config is set to 0 on settings.json', function(){
before(function (done) {
// reset to the default value
resetScrollPercentageWhenFocusLineIsOutOfViewport();
placeCaretInTheBeginningOfLine(0, function(){ // reset caret position
scrollEditorToTopOfPad();
lastLineVisible = getLastLineVisibleOfViewport();
placeCaretInTheBeginningOfLine(lastLineVisible, done); // place caret in the 9th line
});
});
it('does not scroll', function(done){
setTimeout(function() {
var lastLineOfViewport = getLastLineVisibleOfViewport();
var lineDoesNotScroll = lastLineOfViewport === lastLineVisible;
expect(lineDoesNotScroll).to.be(true);
done();
}, 1000);
});
});
context('and scroll percentage config is set to 0.5 on settings.json', function(){
before(function (done) {
setScrollPercentageWhenFocusLineIsOutOfViewport(0.5);
scrollEditorToTopOfPad();
placeCaretInTheBeginningOfLine(0, function(){ // reset caret position
// this timeout inside a callback is ugly but it necessary to give time to aceSelectionChange
// realizes that the selection has been changed
setTimeout(function() {
lastLineVisible = getLastLineVisibleOfViewport();
placeCaretInTheBeginningOfLine(lastLineVisible, done); // place caret in the 9th line
}, 1000);
});
});
it('scrolls line to 50% of the viewport', function(done){
helper.waitFor(function(){
var lastLineOfViewport = getLastLineVisibleOfViewport();
var lastLinesScrolledFiveLinesUp = lastLineOfViewport - 5 === lastLineVisible;
return lastLinesScrolledFiveLinesUp;
}).done(done);
});
});
});
// This is a special case. When user is selecting a text with arrow down or arrow left we have
// to keep the last line selected on focus
context('when the first line selected is out of the viewport and user presses shift arrow down', function(){
var lastLineOfPad = 99;
before(function (done) {
scrollEditorToTopOfPad();
// make a selection bigger than the viewport height
var $firstLineOfSelection = getLine(0);
var $lastLineOfSelection = getLine(lastLineOfPad);
var lengthOfLastLine = $lastLineOfSelection.text().length;
helper.selectLines($firstLineOfSelection, $lastLineOfSelection, 0, lengthOfLastLine);
// place the last line selected on the viewport
scrollEditorToBottomOfPad();
// press a key to make the selection goes down
// although we can't simulate the extending of selection. It's possible to send a key event
// which is captured on ace2_inner scroll function.
pressAndReleaseLeftArrow(true);
done();
});
it('keeps the last line selected on focus', function (done) {
var lastLineOfSelectionIsVisible = isLineOnViewport(lastLineOfPad);
expect(lastLineOfSelectionIsVisible).to.be(true);
done();
});
});
// In this scenario we avoid the bouncing scroll. E.g Let's suppose we have a big line that is
// the size of the viewport, and its top is above the viewport. When user presses '<-', this line
// will scroll down because the top is out of the viewport. When it scrolls down, the bottom of
// line gets below the viewport so when user presses '<-' again it scrolls up to make the bottom
// of line visible. If user presses arrow keys more than one time, the editor will keep scrolling up and down
context('when the line height is bigger than the scroll amount percentage * viewport height', function(){
var scrollOfEditorBeforePressKey;
var BIG_LINE_NUMBER = 0;
var MIDDLE_OF_BIG_LINE = 51;
before(function (done) {
createPadWithALineHigherThanViewportHeight(this, BIG_LINE_NUMBER, function(){
setScrollPercentageWhenFocusLineIsOutOfViewport(0.5); // set any value to force scroll to outside to viewport
var $bigLine = getLine(BIG_LINE_NUMBER);
// each line has about 5 chars, we place the caret in the middle of the line
helper.selectLines($bigLine, $bigLine, MIDDLE_OF_BIG_LINE, MIDDLE_OF_BIG_LINE);
scrollEditorToLeaveTopAndBottomOfBigLineOutOfViewport($bigLine);
scrollOfEditorBeforePressKey = getEditorScroll();
// press a key to force to scroll
pressAndReleaseRightArrow();
done();
});
});
// reset pad to the original text
after(function (done) {
this.timeout(5000);
cleanPad(function(){
createPadWithSeveralLines(function(){
resetEditorWidth();
done();
});
});
});
// as the editor.line is inside of the viewport, it should not scroll
it('should not scroll', function (done) {
var scrollOfEditorAfterPressKey = getEditorScroll();
expect(scrollOfEditorAfterPressKey).to.be(scrollOfEditorBeforePressKey);
done();
});
});
// Some plugins, for example the ep_page_view, change the editor dimensions. This plugin, for example,
// adds padding-top to the ace_outer, which changes the viewport height
describe('integration with plugins which changes the margin of editor', function(){
context('when editor dimensions changes', function(){
before(function () {
// reset the size of editor. Now we show more than 10 lines as in the other tests
resetResizeOfEditorHeight();
scrollEditorToTopOfPad();
// height of the editor viewport
var editorHeight = getEditorHeight();
// add a big padding-top, 50% of the viewport
var paddingTopOfAceOuter = editorHeight/2;
var chrome$ = helper.padChrome$;
var $outerIframe = chrome$('iframe');
$outerIframe.css('padding-top', paddingTopOfAceOuter);
// we set a big value to check if the scroll is made
setScrollPercentageWhenFocusLineIsOutOfViewport(1);
});
context('and user places the caret in the last line visible of the pad', function(){
var lastLineVisible;
beforeEach(function (done) {
lastLineVisible = getLastLineVisibleOfViewport();
placeCaretInTheBeginningOfLine(lastLineVisible, done);
});
it('scrolls the line where caret is', function(done){
helper.waitFor(function(){
var firstLineVisibileOfViewport = getFirstLineVisibileOfViewport();
var linesScrolled = firstLineVisibileOfViewport !== 0;
return linesScrolled;
}).done(done);
});
});
});
});
/* ********************* Helper functions/constants ********************* */
var TOP_OF_PAGE = 0;
var BOTTOM_OF_PAGE = 5000; // we use a big value to force the page to be scrolled all the way down
var LINES_OF_PAD = 100;
var ENTER = 13;
var BACKSPACE = 8;
var LEFT_ARROW = 37;
var UP_ARROW = 38;
var RIGHT_ARROW = 39;
var LINES_ON_VIEWPORT = 10;
var WIDTH_OF_EDITOR_RESIZED = 100;
var LONG_TEXT_CHARS = 100;
var cleanPad = function(callback) {
var inner$ = helper.padInner$;
var $padContent = inner$('#innerdocbody');
$padContent.html('');
// wait for Etherpad to re-create first line
helper.waitFor(function(){
var lineNumber = inner$('div').length;
return lineNumber === 1;
}, 2000).done(callback);
};
var createPadWithSeveralLines = function(done) {
var line = '<span>a</span><br>';
var $firstLine = helper.padInner$('div').first();
var lines = line.repeat(LINES_OF_PAD); //arbitrary number, we need to create lines that is over the viewport
$firstLine.html(lines);
helper.waitFor(function(){
var linesCreated = helper.padInner$('div').length;
return linesCreated === LINES_OF_PAD;
}, 4000).done(done);
};
var createPadWithALineHigherThanViewportHeight = function(test, line, done) {
var viewportHeight = 160; //10 lines * 16px (height of line)
test.timeout(5000);
cleanPad(function(){
// make the editor smaller to make test easier
// with that width the each line has about 5 chars
resizeEditorWidth();
// we create a line with 100 chars, which makes about 20 lines
setLongTextOnLine(line);
helper.waitFor(function () {
var $firstLine = getLine(line);
var heightOfLine = $firstLine.get(0).getBoundingClientRect().height;
return heightOfLine >= viewportHeight;
}, 4000).done(done);
});
};
var setLongTextOnLine = function(line) {
var $line = getLine(line);
var longText = 'a'.repeat(LONG_TEXT_CHARS);
$line.html(longText);
};
// resize the editor to make the tests easier
var resizeEditorHeight = function() {
var chrome$ = helper.padChrome$;
chrome$('#editorcontainer').css('height', getSizeOfViewport());
};
// this makes about 5 chars per line
var resizeEditorWidth = function() {
var chrome$ = helper.padChrome$;
chrome$('#editorcontainer').css('width', WIDTH_OF_EDITOR_RESIZED);
};
var resetResizeOfEditorHeight = function() {
var chrome$ = helper.padChrome$;
chrome$('#editorcontainer').css('height', '');
};
var resetEditorWidth = function () {
var chrome$ = helper.padChrome$;
chrome$('#editorcontainer').css('width', '');
};
var getEditorHeight = function() {
var chrome$ = helper.padChrome$;
var $editor = chrome$('#editorcontainer');
var editorHeight = $editor.get(0).clientHeight;
return editorHeight;
};
var getSizeOfViewport = function() {
return getLinePositionOnViewport(LINES_ON_VIEWPORT) - getLinePositionOnViewport(0);
};
var scrollPageTo = function(value) {
var outer$ = helper.padOuter$;
var $ace_outer = outer$('#outerdocbody').parent();
$ace_outer.parent().scrollTop(value);
};
var scrollEditorToTopOfPad = function() {
scrollPageTo(TOP_OF_PAGE);
};
var scrollEditorToBottomOfPad = function() {
scrollPageTo(BOTTOM_OF_PAGE);
};
var scrollEditorToLeaveTopAndBottomOfBigLineOutOfViewport = function ($bigLine) {
var lineHeight = $bigLine.get(0).getBoundingClientRect().height;
var middleOfLine = lineHeight/2;
scrollPageTo(middleOfLine);
};
var getLine = function(lineNum) {
var inner$ = helper.padInner$;
var $line = inner$('div').eq(lineNum);
return $line;
};
var placeCaretAtTheEndOfLine = function(lineNum) {
var $targetLine = getLine(lineNum);
var lineLength = $targetLine.text().length;
helper.selectLines($targetLine, $targetLine, lineLength, lineLength);
};
var placeCaretInTheBeginningOfLine = function(lineNum, cb) {
var $targetLine = getLine(lineNum);
helper.selectLines($targetLine, $targetLine, 0, 0);
helper.waitFor(function() {
var $lineWhereCaretIs = getLineWhereCaretIs();
return $targetLine.get(0) === $lineWhereCaretIs.get(0);
}).done(cb);
};
var getLineWhereCaretIs = function() {
var inner$ = helper.padInner$;
var nodeWhereCaretIs = inner$.document.getSelection().anchorNode;
var $lineWhereCaretIs = $(nodeWhereCaretIs).closest('div');
return $lineWhereCaretIs;
};
var getFirstLineVisibileOfViewport = function() {
return _.find(_.range(0, LINES_OF_PAD - 1), isLineOnViewport);
};
var getLastLineVisibleOfViewport = function() {
return _.find(_.range(LINES_OF_PAD - 1, 0, -1), isLineOnViewport);
};
var pressKey = function(keyCode, shiftIsPressed){
var inner$ = helper.padInner$;
/*
* These events use keydown and up, not keypress.
* Do not change. Changing to keypress will break Edge.
*/
var e = inner$.Event("keydown");
e.shiftKey = shiftIsPressed || false;
e.keyCode = keyCode;
e.which = keyCode; // etherpad listens to 'which'
inner$('#innerdocbody').trigger(e);
};
var releaseKey = function(keyCode){
var inner$ = helper.padInner$;
/*
* These events use keydown and up, not keypress.
* Do not change. Changing to keypress will break Edge.
*/
var e = inner$.Event("keyup");
e.keyCode = keyCode;
e.which = keyCode; // etherpad listens to 'which'
inner$('#innerdocbody').trigger(e);
};
var pressEnter = function() {
pressKey(ENTER); // This doesn't work in Edge
};
var pressBackspace = function() {
pressKey(BACKSPACE);
};
var pressAndReleaseUpArrow = function() {
pressKey(UP_ARROW);
releaseKey(UP_ARROW);
};
var pressAndReleaseRightArrow = function() {
pressKey(RIGHT_ARROW);
releaseKey(RIGHT_ARROW);
};
var pressAndReleaseLeftArrow = function(shiftIsPressed) {
pressKey(LEFT_ARROW, shiftIsPressed);
releaseKey(LEFT_ARROW);
};
var isLineOnViewport = function(lineNumber) {
// in the function scrollNodeVerticallyIntoView from ace2_inner.js, iframePadTop is used to calculate
// how much scroll is needed. Although the name refers to padding-top, this value is not set on the
// padding-top.
var iframePadTop = 8;
var $line = getLine(lineNumber);
var linePosition = $line.get(0).getBoundingClientRect();
// position relative to the current viewport
var linePositionTopOnViewport = linePosition.top - getEditorScroll() + iframePadTop;
var linePositionBottomOnViewport = linePosition.bottom - getEditorScroll();
var lineBellowTop = linePositionBottomOnViewport > 0;
var lineAboveBottom = linePositionTopOnViewport < getClientHeightVisible();
var isVisible = lineBellowTop && lineAboveBottom;
return isVisible;
};
var getEditorScroll = function () {
var outer$ = helper.padOuter$;
var scrollTopFirefox = outer$('#outerdocbody').parent().scrollTop(); // works only on firefox
var scrollTop = outer$('#outerdocbody').scrollTop() || scrollTopFirefox;
return scrollTop;
};
// clientHeight includes padding, so we have to subtract it and consider only the visible viewport
var getClientHeightVisible = function () {
var outer$ = helper.padOuter$;
var $ace_outer = outer$('#outerdocbody').parent();
var ace_outerHeight = $ace_outer.get(0).clientHeight;
var ace_outerPaddingTop = getIntValueOfCSSProperty($ace_outer, 'padding-top');
var paddingAddedWhenPageViewIsEnable = getPaddingAddedWhenPageViewIsEnable();
var clientHeight = ace_outerHeight - ( ace_outerPaddingTop + paddingAddedWhenPageViewIsEnable);
return clientHeight;
};
// ep_page_view changes the dimensions of the editor. We have to guarantee
// the viewport height is calculated right
var getPaddingAddedWhenPageViewIsEnable = function () {
var chrome$ = helper.padChrome$;
var $outerIframe = chrome$('iframe');
var paddingAddedWhenPageViewIsEnable = parseInt($outerIframe.css('padding-top'));
return paddingAddedWhenPageViewIsEnable;
};
var getIntValueOfCSSProperty = function($element, property){
var valueString = $element.css(property);
return parseInt(valueString) || 0;
};
var forceUseMonospacedFont = function () {
helper.padChrome$.window.clientVars.padOptions.useMonospaceFont = true;
};
var setScrollPercentageWhenFocusLineIsOutOfViewport = function(value, editionAboveViewport) {
var scrollSettings = helper.padChrome$.window.clientVars.scrollWhenFocusLineIsOutOfViewport;
if (editionAboveViewport) {
scrollSettings.percentage.editionAboveViewport = value;
}else{
scrollSettings.percentage.editionBelowViewport = value;
}
};
var resetScrollPercentageWhenFocusLineIsOutOfViewport = function() {
var scrollSettings = helper.padChrome$.window.clientVars.scrollWhenFocusLineIsOutOfViewport;
scrollSettings.percentage.editionAboveViewport = 0;
scrollSettings.percentage.editionBelowViewport = 0;
};
var setPercentageToScrollWhenUserPressesArrowUp = function (value) {
var scrollSettings = helper.padChrome$.window.clientVars.scrollWhenFocusLineIsOutOfViewport;
scrollSettings.percentageToScrollWhenUserPressesArrowUp = value;
};
var scrollWhenPlaceCaretInTheLastLineOfViewport = function() {
var scrollSettings = helper.padChrome$.window.clientVars.scrollWhenFocusLineIsOutOfViewport;
scrollSettings.scrollWhenCaretIsInTheLastLineOfViewport = true;
};
var getLinePositionOnViewport = function(lineNumber) {
var $line = getLine(lineNumber);
var linePosition = $line.get(0).getBoundingClientRect();
// position relative to the current viewport
return linePosition.top - getEditorScroll();
};
});