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Y.Text snapshot support (toDelta)

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This commit is contained in:
Kevin Jahns
2019-08-31 22:42:18 +02:00
parent e78d84ee59
commit 8bcff6138c
5 changed files with 153 additions and 38 deletions
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84
src/types/YText.js
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@@ -16,6 +16,7 @@ import {
ContentEmbed,
ContentFormat,
ContentString,
splitSnapshotAffectedStructs,
Doc, Item, Snapshot, StructStore, Transaction // eslint-disable-line
} from '../internals.js'
@@ -723,6 +724,7 @@ export class YText extends AbstractType {
*/
const ops = []
const currentAttributes = new Map()
const doc = /** @type {Doc} */ (this.doc)
let str = ''
let n = this._start
function packStr () {
@@ -748,42 +750,54 @@ export class YText extends AbstractType {
str = ''
}
}
while (n !== null) {
if (isVisible(n, snapshot) || (prevSnapshot !== undefined && isVisible(n, prevSnapshot))) {
switch (n.content.constructor) {
case ContentString:
const cur = currentAttributes.get('ychange')
if (snapshot !== undefined && !isVisible(n, snapshot)) {
if (cur === undefined || cur.user !== n.id.client || cur.state !== 'removed') {
packStr()
currentAttributes.set('ychange', { user: n.id.client, state: 'removed' })
}
} else if (prevSnapshot !== undefined && !isVisible(n, prevSnapshot)) {
if (cur === undefined || cur.user !== n.id.client || cur.state !== 'added') {
packStr()
currentAttributes.set('ychange', { user: n.id.client, state: 'added' })
}
} else if (cur !== undefined) {
packStr()
currentAttributes.delete('ychange')
}
str += /** @type {ContentString} */ (n.content).str
break
case ContentEmbed:
packStr()
ops.push({
insert: /** @type {ContentEmbed} */ (n.content).embed
})
break
case ContentFormat:
packStr()
updateCurrentAttributes(currentAttributes, /** @type {ContentFormat} */ (n.content))
break
}
// snapshots are merged again after the transaction, so we need to keep the
// transalive until we are done
transact(doc, transaction => {
if (snapshot) {
splitSnapshotAffectedStructs(transaction, snapshot)
}
n = n.right
}
packStr()
if (prevSnapshot) {
splitSnapshotAffectedStructs(transaction, prevSnapshot)
}
while (n !== null) {
if (isVisible(n, snapshot) || (prevSnapshot !== undefined && isVisible(n, prevSnapshot))) {
switch (n.content.constructor) {
case ContentString:
const cur = currentAttributes.get('ychange')
if (snapshot !== undefined && !isVisible(n, snapshot)) {
if (cur === undefined || cur.user !== n.id.client || cur.state !== 'removed') {
packStr()
currentAttributes.set('ychange', { user: n.id.client, state: 'removed' })
}
} else if (prevSnapshot !== undefined && !isVisible(n, prevSnapshot)) {
if (cur === undefined || cur.user !== n.id.client || cur.state !== 'added') {
packStr()
currentAttributes.set('ychange', { user: n.id.client, state: 'added' })
}
} else if (cur !== undefined) {
packStr()
currentAttributes.delete('ychange')
}
str += /** @type {ContentString} */ (n.content).str
break
case ContentEmbed:
packStr()
ops.push({
insert: /** @type {ContentEmbed} */ (n.content).embed
})
break
case ContentFormat:
if (isVisible(n, snapshot)) {
packStr()
updateCurrentAttributes(currentAttributes, /** @type {ContentFormat} */ (n.content))
}
break
}
}
n = n.right
}
packStr()
}, splitSnapshotAffectedStructs)
return ops
}