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tests: better timeslider follow contents (#4421)

pull/4425/head
webzwo0i 2020-10-21 11:05:58 +02:00 committed by GitHub
parent 0eb0a07914
commit 1e7a9e1791
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1 changed files with 18 additions and 7 deletions
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25
src/static/js/broadcast.js
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@ -245,6 +245,7 @@ function loadBroadcastJS(socket, sendSocketMsg, fireWhenAllScriptsAreLoaded, Bro
BroadcastSlider.setSliderPosition(revision); BroadcastSlider.setSliderPosition(revision);
} }
let oldAlines = padContents.alines.slice();
try try
{ {
// must mutate attribution lines before text lines // must mutate attribution lines before text lines
@ -255,15 +256,25 @@ function loadBroadcastJS(socket, sendSocketMsg, fireWhenAllScriptsAreLoaded, Bro
debugLog(e); debugLog(e);
} }
// we want to scroll to the area that is changed before the lines are mutated and we can't go // scroll to the area that is changed before the lines are mutated
// to a line that is not there yet
let lineNumber = Changeset.opIterator(Changeset.unpack(changeset).ops).next().lines;
if($('#options-followContents').is(":checked") || $('#options-followContents').prop("checked")){ if($('#options-followContents').is(":checked") || $('#options-followContents').prop("checked")){
if(padContents.currentLines.length <= lineNumber){ // get the index of the first line that has mutated attributes
goToLineNumber(padContents.currentLines.length-1) // the last line in `oldAlines` should always equal to "|1+1", ie newline without attributes
} else { // so it should be safe to assume this line has changed attributes when inserting content at
goToLineNumber(lineNumber); // the bottom of a pad
let lineChanged;
_.some(oldAlines, function(line, index){
if(line !== padContents.alines[index]){
lineChanged = index;
return true; // break
}
})
// deal with someone is the author of a line and changes one character, so the alines won't change
if(lineChanged === undefined) {
lineChanged = Changeset.opIterator(Changeset.unpack(changeset).ops).next().lines;
} }
goToLineNumber(lineChanged);
} }
Changeset.mutateTextLines(changeset, padContents); Changeset.mutateTextLines(changeset, padContents);