apps/readest-app/src/utils/insets.ts

import { Insets } from '@/types/misc';
import { ViewSettings } from '@/types/book';

export const getViewInsets = (viewSettings: ViewSettings) => {
  const showHeader = viewSettings.showHeader!;
  const showFooter = viewSettings.showFooter!;
  const isVertical = viewSettings.vertical || viewSettings.writingMode.includes('vertical');
  const fullMarginTopPx = viewSettings.marginPx || viewSettings.marginTopPx;
  const compactMarginTopPx = viewSettings.compactMarginPx || viewSettings.compactMarginTopPx;
  const fullMarginBottomPx = viewSettings.marginBottomPx;
  const compactMarginBottomPx = viewSettings.compactMarginBottomPx;
  const fullMarginLeftPx = viewSettings.marginLeftPx;
  const fullMarginRightPx = viewSettings.marginRightPx;
  const compactMarginLeftPx = viewSettings.compactMarginLeftPx;
  const compactMarginRightPx = viewSettings.compactMarginRightPx;

  return {
    top: showHeader && !isVertical ? fullMarginTopPx : compactMarginTopPx,
    right: showHeader && isVertical ? fullMarginRightPx : compactMarginRightPx,
    bottom: showFooter && !isVertical ? fullMarginBottomPx : compactMarginBottomPx,
    left: showFooter && isVertical ? fullMarginLeftPx : compactMarginLeftPx,
  } as Insets;
};