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Fix text lines mutator #2911

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Fix text lines mutator #2911

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927a3e7
tests: Add regression tests for #2836
webzwo0i Jan 23, 2016
77e4cde
Add another regression test that deletes all lines and inserts two
webzwo0i Jan 23, 2016
a8f09ab
- fix handling of insertions when there is nothing left in the lines
webzwo0i Jan 26, 2016
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28 changes: 23 additions & 5 deletions src/static/js/Changeset.js
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Original file line number Diff line number Diff line change
Expand Up @@ -711,9 +711,14 @@ exports.textLinesMutator = (lines) => {
curSplice[1] += L - 1;
const sline = curSplice.length - 1;
removed = curSplice[sline].substring(curCol) + removed;
curSplice[sline] = curSplice[sline].substring(0, curCol) +
linesGet(curSplice[0] + curSplice[1]);
curSplice[1] += 1;
const line = linesGet(curSplice[0] + curSplice[1]);
// if no line follows the splice
if (!line) {
curSplice[sline] = curSplice[sline].substring(0, curCol);
} else {
curSplice[sline] = curSplice[sline].substring(0, curCol) + line;
curSplice[1] += 1;
}
}
} else {
removed = nextKLinesText(L);
Expand Down Expand Up @@ -775,14 +780,27 @@ exports.textLinesMutator = (lines) => {
curLine += newLines.length;
// insert the remaining chars from the "old" line (e.g. the line we were in
// when we started to insert new lines)
curSplice.push(theLine.substring(lineCol));
// if nothing is left we don't push an empty string
if (theLine.substring(lineCol)) {
curSplice.push(theLine.substring(lineCol));
}
curCol = 0; // TODO(doc) why is this not set to the length of last line?
} else {
Array.prototype.push.apply(curSplice, newLines);
curLine += newLines.length;
}
} else if (lines_get(curSplice[0] + curSplice[1]) === undefined) {
// find out if there is a line in splice that is not finished processing
if (isCurLineInSplice()) { // if yes, we can add our text to it
const sline = curSplice.length - 1;
curSplice[sline] =
curSplice[sline].substring(0, curCol) + text + curSplice[sline].substring(curCol);
curCol += text.length;
} else { // if no, we need to add the text in a new line
Array.prototype.push.apply(curSplice, [text]);
curCol += text.length;
}
} else {
// there are no additional lines
// although the line is put into splice, curLine is not increased, because
// there may be more chars in the line (newline is not reached)
const sline = putCurLineInSplice();
Expand Down
28 changes: 28 additions & 0 deletions src/tests/frontend/specs/easysync.js
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Original file line number Diff line number Diff line change
Expand Up @@ -178,6 +178,34 @@ describe('easysync', function () {
['skip', 1, 1, true],
], ['banana\n', 'cabbage\n', 'duffle\n']);

// #2836 regressions
runMutationTest(8, ['\n', 'foo\n', '\n'], [
['remove', 1, 1, '\n'],
['skip', 4, 1, false],
['remove', 1, 1, '\n'],
['insert', 'c'],
], ['foo\n', 'c']);
runMutationTest(9, ['\n', 'foo\n', '\n'], [
['remove', 1, 1, '\n'],
['skip', 3, 0, false],
['remove', 2, 2, '\n\n'],
['insert', 'c'],
], ['fooc']);
runMutationTest(10, ['\n'], [
['remove', 1, 1, '\n'],
['insert', 'c', 0],
], ['c']); // TODO find out if c must have a newline because of unknown constraints
runMutationTest(11, ['\n'], [
['remove', 1, 1, '\n'],
['insert', 'a'],
['insert', 'c\n', 1],
], ['ac\n']);
runMutationTest(12, ['\n'], [
['remove', 1, 1, '\n'],
['insert', 'a\n', 1],
['insert', 'c'],
], ['a\n', 'c']); // TODO find out if c must have a newline because of unknown constraints

const poolOrArray = (attribs) => {
if (attribs.getAttrib) {
return attribs; // it's already an attrib pool
Expand Down