Class StringDiffModel

packages/nbdime/src/diff/model/string.ts:79–177

 * Standard implementation of the IStringDiffModel interface.
 */
export class StringDiffModel implements IStringDiffModel {
  /**
   * StringDiffModel constructor.
   *
   * Will translate additions and deletions from absolute
   * coordinates, into {line, ch} based coordinates.
   * Both should be sorted on the `from` position before passing.
   *
   * Collapsible and collapsed both defaults to false.
   */
  constructor(
    public base: string | null,
    remote: string | null,
    additions: DiffRangeRaw[],
    deletions: DiffRangeRaw[],
    collapsible?: boolean,
    header?: string,
    collapsed?: boolean,
  ) {
    this._remote = remote;
    if (base === null) {
      console.assert(deletions.length === 0);
      this.deletions = [];
    } else {
      this.deletions = raw2Pos(deletions, base);
    }
    if (remote === null) {
      console.assert(additions.length === 0);
      this.additions = [];
    } else {
      this.additions = raw2Pos(additions, remote);
    }

    this.collapsible = collapsible === true;
    if (this.collapsible) {
      this.collapsibleHeader = header ? header : '';
      this.startCollapsed = collapsed === true;
    }
  }

  iterateDiffs(): StringDiffModel.DiffIter {
    return new StringDiffModel.DiffIter(this);
  }

  /**
   * Chunk additions/deletions into line-based chunks
   */
  getLineChunks(): Chunk[] {
    let chunker = new LineChunker();
    let i = this.iterateDiffs();
    for (let v = i.next(); v !== undefined; v = i.next()) {
      chunker.addDiff(v.range, v.isAddition);
    }
    return chunker.chunks;
  }

  get remote(): string | null {
    return this._remote;