GoExcelizeAPI源码阅读GetPageLayout及SetPageMargins

func (f *File) GetPageLayout(sheet string, opts ...PageLayoutOptionPtr) error

f := excelize.NewFile()
const sheet = "Sheet1"
var (
    orientation excelize.PageLayoutOrientation
    paperSize   excelize.PageLayoutPaperSize
)
if err := f.GetPageLayout("Sheet1", &orientation); err != nil {
    fmt.Println(err)
}
if err := f.GetPageLayout("Sheet1", &paperSize); err != nil {
    fmt.Println(err)
}
fmt.Println("Defaults:")
fmt.Printf("- orientation: %q\n", orientation)
fmt.Printf("- paper size: %d\n", paperSize)

// GetPageLayout provides a function to gets worksheet page layout.
//
// Available options:
//   PageLayoutOrientation(string)
//   PageLayoutPaperSize(int)
//   FitToHeight(int)
//   FitToWidth(int)
func (f *File) GetPageLayout(sheet string, opts ...PageLayoutOptionPtr) error {
	s, err := f.workSheetReader(sheet)
	if err != nil {
		return err
	}
	ps := s.PageSetUp
	for _, opt := range opts {
		opt.getPageLayout(ps)
	}
	return err
}

func (f *File) SetPageMargins(sheet string, opts ...PageMarginsOptions) error

f := excelize.NewFile()
const sheet = "Sheet1"
if err := f.SetPageMargins(sheet,
    excelize.PageMarginBottom(1.0),
    excelize.PageMarginFooter(1.0),
    excelize.PageMarginHeader(1.0),
    excelize.PageMarginLeft(1.0),
    excelize.PageMarginRight(1.0),
    excelize.PageMarginTop(1.0),
); err != nil {
    fmt.Println(err)
}

// SetPageMargins provides a function to set worksheet page margins.
//
// Available options:
//   PageMarginBottom(float64)
//   PageMarginFooter(float64)
//   PageMarginHeader(float64)
//   PageMarginLeft(float64)
//   PageMarginRight(float64)
//   PageMarginTop(float64)
func (f *File) SetPageMargins(sheet string, opts ...PageMarginsOptions) error {
	s, err := f.workSheetReader(sheet)
	if err != nil {
		return err
	}
	pm := s.PageMargins
	if pm == nil {
		pm = new(xlsxPageMargins)
		s.PageMargins = pm
	}
	for _, opt := range opts {
		opt.setPageMargins(pm)
	}
	return err
}

	for _, opt := range opts {
		opt.setPageMargins(pm)
	}