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Fix history diffs when deleting over many tracked deletes (#19193)

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* Fix history diffs when deleting over many tracked deletes

As we are looping through tracked deletes, the offset between the result
positions and the source positions must be kept constant. Otherwise, the
tracked deletes are translated as we delete text and move the source
cursor.

GitOrigin-RevId: b2417a75219aaa16bf5c61e0ebcb0586cae6aef2
This commit is contained in:
Eric Mc Sween
2024-06-28 08:10:50 -04:00
committed by Copybot
parent 6a65644778
commit e4cc2a0816
2 changed files with 173 additions and 6 deletions
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10
services/project-history/app/js/ChunkTranslator.js
View File

@@ -463,11 +463,10 @@ class TextUpdateBuilder {
tc.range.overlaps(resultRetentionRange)
)
const sourceOffset = this.sourceCursor - this.result.length
for (const trackedDelete of trackedDeletes) {
const resultTrackedDelete = trackedDelete.range
const sourceTrackedDelete = trackedDelete.range.moveBy(
this.sourceCursor - this.result.length
)
const sourceTrackedDelete = trackedDelete.range.moveBy(sourceOffset)
if (scanCursor < resultTrackedDelete.start) {
if (retain.tracking.type === 'delete') {
@@ -566,12 +565,11 @@ class TextUpdateBuilder {
.sort((a, b) => a.range.start - b.range.start)
let scanCursor = this.result.length
const sourceOffset = this.sourceCursor - this.result.length
for (const trackedDelete of trackedDeletes) {
const resultTrackDeleteRange = trackedDelete.range
const sourceTrackDeleteRange = trackedDelete.range.moveBy(
this.sourceCursor - this.result.length
)
const sourceTrackDeleteRange = trackedDelete.range.moveBy(sourceOffset)
if (scanCursor < resultTrackDeleteRange.start) {
this.changes.push({

169
services/project-history/test/unit/js/ChunkTranslator/ChunkTranslatorTests.js
View File

@@ -2738,6 +2738,175 @@ describe('ChunkTranslator', function () {
}
)
})
describe('whith multiple tracked deletes', function () {
beforeEach(function () {
this.fileContents = 'Hello planet world universe, this is a test'
this.ranges = JSON.stringify({
trackedChanges: [
{
range: { pos: 6, length: 7 },
tracking: {
type: 'delete',
userId: this.author1.id,
ts: '2024-01-01T00:00:00.000Z',
},
},
{
range: { pos: 18, length: 9 },
tracking: {
type: 'delete',
userId: this.author1.id,
ts: '2024-01-01T00:00:00.000Z',
},
},
],
})
this.HistoryStoreManager.getProjectBlob
.withArgs(this.historyId, this.rangesHash)
.yields(null, this.ranges)
this.HistoryStoreManager.getProjectBlob
.withArgs(this.historyId, this.fileHash)
.yields(null, this.fileContents)
})
it('should handle a deletion that spans multiple tracked deletes', function (done) {
this.chunk = {
chunk: {
startVersion: 0,
history: {
snapshot: {
files: {
'main.tex': {
hash: this.fileHash,
rangesHash: this.rangesHash,
stringLength: this.fileContents.length,
},
},
},
changes: [
{
operations: [
{
pathname: 'main.tex',
textOperation: [
// [...] is a tracked delete
6, // Hello |[planet ]world[ universe], this is a test
-21, // Hello|, this is a test
16,
],
},
],
timestamp: this.date.toISOString(),
authors: [this.author1.id],
},
],
},
},
authors: [this.author1.id],
}
this.ChunkTranslator.convertToDiffUpdates(
this.projectId,
this.chunk,
'main.tex',
0,
1,
(error, diff) => {
expect(error).to.be.null
expect(diff.updates).to.deep.equal([
{
op: [
{
d: 'world',
p: 6,
},
],
meta: {
users: [this.author1.id],
start_ts: this.date.getTime(),
end_ts: this.date.getTime(),
},
v: 0,
},
])
done()
}
)
})
it('should handle a tracked deletion that spans multiple tracked deletes', function (done) {
this.chunk = {
chunk: {
startVersion: 0,
history: {
snapshot: {
files: {
'main.tex': {
hash: this.fileHash,
rangesHash: this.rangesHash,
stringLength: this.fileContents.length,
},
},
},
changes: [
{
operations: [
{
pathname: 'main.tex',
textOperation: [
// [...] is a tracked delete
6, // Hello |[planet ]world[ universe], this is a test
{
r: 21,
tracking: {
type: 'delete',
userId: this.author1.id,
ts: '2024-01-01T00:00:00.000Z',
},
}, // Hello [planet world universe]|, this is a test
16,
],
},
],
timestamp: this.date.toISOString(),
authors: [this.author1.id],
},
],
},
},
authors: [this.author1.id],
}
this.ChunkTranslator.convertToDiffUpdates(
this.projectId,
this.chunk,
'main.tex',
0,
1,
(error, diff) => {
expect(error).to.be.null
expect(diff.updates).to.deep.equal([
{
op: [
{
d: 'world',
p: 6,
},
],
meta: {
users: [this.author1.id],
start_ts: this.date.getTime(),
end_ts: this.date.getTime(),
},
v: 0,
},
])
done()
}
)
})
})
})
})
})