Function splitLeftRailColor

src/ui/diff/rowStyle.ts:50–57

(
  kind: SplitLineCell["kind"],
  theme: AppTheme,
  selected: boolean,
)

/** Pick the left split-view rail color from the old-side cell state. */
export function splitLeftRailColor(
  kind: SplitLineCell["kind"],
  theme: AppTheme,
  selected: boolean,
) {
  const color = kind === "deletion" ? theme.removedSignColor : neutralRailColor(theme);
  return selected ? color : dimRailColor(color, theme);
}

/** Pick the right split-view rail color from the new-side cell state. */
export function splitRightRailColor(