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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | 1x 1x 904x 231x 231x 231x 231x 684x 4x 4x 680x 676x 4x 4x 684x 8x 684x 676x 676x 8x 4x 684x 231x 684x | import {
Change,
DeleteChange,
InsertChange,
ReplaceChange,
} from 'cyia-code-util';
export class RawUpdater {
static update(content: string, change: Change[]) {
change = change.sort((a, b) => b.start - a.start);
return new RawUpdater(content, change).update();
}
originContent!: string;
constructor(private content: string, private changes: Change[]) {
this.originContent = content;
}
update() {
this.changes.forEach((change) => {
let deleteChange: DeleteChange | undefined;
let insertChange: InsertChange | undefined;
if (change instanceof ReplaceChange) {
insertChange = new InsertChange(change.start, change.content);
deleteChange = new DeleteChange(change.start, change.length);
} else if (change instanceof InsertChange) {
insertChange = change;
} else Eif (change instanceof DeleteChange) {
deleteChange = change;
}
let list!: [string, string];
if (deleteChange) {
list = this.slice(deleteChange.start, deleteChange.length);
}
if (!list && insertChange) {
list = this.slice(insertChange.start);
list.splice(1, 0, insertChange.content);
} else if (insertChange) {
list.splice(1, 0, insertChange.content);
}
this.content = list.join('');
});
return this.content;
}
private slice(pos: number, length: number = 0): [string, string] {
return [
this.content.substring(0, pos),
this.content.substring(pos + length),
];
}
}
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