Function buildSplitRows

src/ui/diff/pierre.ts:772–895

(
  file: DiffFile,
  highlighted: HighlightedDiffCode | null,
  theme: AppTheme,
)

/** Expand Pierre metadata into the flat split-view row stream consumed by the renderer. */
export function buildSplitRows(
  file: DiffFile,
  highlighted: HighlightedDiffCode | null,
  theme: AppTheme,
): DiffRow[] {
  const rows: DiffRow[] = [];
  const deletionLines = highlighted?.deletionLines ?? [];
  const additionLines = highlighted?.additionLines ?? [];

  for (const [hunkIndex, hunk] of file.metadata.hunks.entries()) {
    if (hunk.collapsedBefore > 0) {
      rows.push({
        type: "collapsed",
        key: `${file.id}:collapsed:${hunkIndex}`,
        fileId: file.id,
        hunkIndex,
        text: collapsedRowText(hunk.collapsedBefore),
        position: "before",
        ...leadingCollapsedRanges(hunk),
      });
    }

    rows.push({
      type: "hunk-header",
      key: `${file.id}:header:${hunkIndex}`,
      fileId: file.id,
      hunkIndex,
      text: formatHunkHeader(hunk),
    });

    let deletionLineIndex = hunk.deletionLineIndex;
    let additionLineIndex = hunk.additionLineIndex;
    let deletionLineNumber = hunk.deletionStart;
    let additionLineNumber = hunk.additionStart;

    for (const content of hunk.hunkContent) {
      if (content.type === "context") {
        for (let offset = 0; offset < content.lines; offset += 1) {
          rows.push({
            type: "split-line",
            key: `${file.id}:split:${hunkIndex}:context:${deletionLineIndex + offset}:${additionLineIndex + offset}`,
            fileId: file.id,
            hunkIndex,
            left: makeSplitCell(
              "context",
              deletionLineNumber + offset,
              file.metadata.deletionLines[deletionLineIndex + offset],
              deletionLines[deletionLineIndex + offset],
              theme,
            ),
            right: makeSplitCell(
              "context",
              additionLineNumber + offset,
              file.metadata.additionLines[additionLineIndex + offset],
              additionLines[additionLineIndex + offset],
              theme,
            ),
          });