Function loadHighlightedDiff

src/ui/diff/pierre.ts:679–711

(
  file: DiffFile,
  theme: HighlightThemeInput = "dark",
)

/** Highlight a diff file and return just the rendered line trees the UI needs. */
export async function loadHighlightedDiff(
  file: DiffFile,
  theme: HighlightThemeInput = "dark",
): Promise<HighlightedDiffCode> {
  try {
    const highlighter = await prepareHighlighter(file.language, theme);
    return queueHighlightedWork(() => {
      const highlighted = renderDiffWithHighlighter(
        file.metadata,
        highlighter,
        pierreRenderOptions(theme),
      );
      return aliasHighlightedContextLines(file, {
        deletionLines: highlighted.code.deletionLines as Array<HastNode | undefined>,
        additionLines: highlighted.code.additionLines as Array<HastNode | undefined>,
      });
    });
  } catch {
    const fallbackTheme = highlightThemeAppearance(theme);
    const highlighter = await prepareHighlighter("text", fallbackTheme);
    return queueHighlightedWork(() => {
      const highlighted = renderDiffWithHighlighter(
        { ...file.metadata, lang: "text" },
        highlighter,
        pierreRenderOptions(fallbackTheme),
      );
      return aliasHighlightedContextLines(file, {
        deletionLines: highlighted.code.deletionLines as Array<HastNode | undefined>,
        additionLines: highlighted.code.additionLines as Array<HastNode | undefined>,
      });
    });
  }
}

/** Highlight a full source file for unchanged lines synthesized during gap expansion. */
export async function loadHighlightedSourceLines({