This closes #1199, support apply number format by system date and time options

- Add new options `ShortDateFmtCode`, `LongDateFmtCode` and `LongTimeFmtCode`
- Update unit tests

cell.go

@@ -1336,6 +1336,15 @@ func (f *File) getCellStringFunc(sheet, cell string, fn func(x *xlsxWorksheet, c
 	return "", nil
 }
 
+// applyBuiltInNumFmt provides a function to returns a value after formatted
+// with built-in number format code, or specified sort date format code.
+func (f *File) applyBuiltInNumFmt(c *xlsxC, fmtCode string, numFmtID int, date1904 bool, cellType CellType) string {
+	if numFmtID == 14 && f.options != nil && f.options.ShortDateFmtCode != "" {
+		fmtCode = f.options.ShortDateFmtCode
+	}
+	return format(c.V, fmtCode, date1904, cellType, f.options)
+}
+
 // formattedValue provides a function to returns a value after formatted. If
 // it is possible to apply a format to the cell value, it will do so, if not
 // then an error will be returned, along with the raw value of the cell.
@@ -1366,14 +1375,14 @@ func (f *File) formattedValue(c *xlsxC, raw bool, cellType CellType) (string, er
 		date1904 = wb.WorkbookPr.Date1904
 	}
 	if fmtCode, ok := builtInNumFmt[numFmtID]; ok {
-		return format(c.V, fmtCode, date1904, cellType), err
+		return f.applyBuiltInNumFmt(c, fmtCode, numFmtID, date1904, cellType), err
 	}
 	if styleSheet.NumFmts == nil {
 		return c.V, err
 	}
 	for _, xlsxFmt := range styleSheet.NumFmts.NumFmt {
 		if xlsxFmt.NumFmtID == numFmtID {
-			return format(c.V, xlsxFmt.FormatCode, date1904, cellType), err
+			return format(c.V, xlsxFmt.FormatCode, date1904, cellType, f.options), err
 		}
 	}
 	return c.V, err

cell_test.go

@@ -873,7 +873,7 @@ func TestFormattedValue(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, "311", result)
 
-	assert.Equal(t, "0_0", format("0_0", "", false, CellTypeNumber))
+	assert.Equal(t, "0_0", format("0_0", "", false, CellTypeNumber, nil))
 
 	// Test format value with unsupported charset workbook
 	f.WorkBook = nil
@@ -887,7 +887,7 @@ func TestFormattedValue(t *testing.T) {
 	_, err = f.formattedValue(&xlsxC{S: 1, V: "43528"}, false, CellTypeNumber)
 	assert.EqualError(t, err, "XML syntax error on line 1: invalid UTF-8")
 
-	assert.Equal(t, "text", format("text", "0", false, CellTypeNumber))
+	assert.Equal(t, "text", format("text", "0", false, CellTypeNumber, nil))
 }
 
 func TestFormattedValueNilXfs(t *testing.T) {

excelize.go

@@ -79,12 +79,27 @@ type charsetTranscoderFn func(charset string, input io.Reader) (rdr io.Reader, e
 // temporary directory when the file size is over this value, this value
 // should be less than or equal to UnzipSizeLimit, the default value is
 // 16MB.
+//
+// ShortDateFmtCode specifies the short date number format code. In the
+// spreadsheet applications, date formats display date and time serial numbers
+// as date values. Date formats that begin with an asterisk (*) respond to
+// changes in regional date and time settings that are specified for the
+// operating system. Formats without an asterisk are not affected by operating
+// system settings. The ShortDateFmtCode used for specifies apply date formats
+// that begin with an asterisk.
+//
+// LongDateFmtCode specifies the long date number format code.
+//
+// LongTimeFmtCode specifies the long time number format code.
 type Options struct {
 	MaxCalcIterations uint
 	Password          string
 	RawCellValue      bool
 	UnzipSizeLimit    int64
 	UnzipXMLSizeLimit int64
+	ShortDateFmtCode  string
+	LongDateFmtCode   string
+	LongTimeFmtCode   string
 }
 
 // OpenFile take the name of an spreadsheet file and returns a populated

file.go

@@ -26,7 +26,7 @@ import (
 // For example:
 //
 //	f := NewFile()
-func NewFile() *File {
+func NewFile(opts ...Options) *File {
 	f := newFile()
 	f.Pkg.Store("_rels/.rels", []byte(xml.Header+templateRels))
 	f.Pkg.Store(defaultXMLPathDocPropsApp, []byte(xml.Header+templateDocpropsApp))
@@ -49,6 +49,7 @@ func NewFile() *File {
 	ws, _ := f.workSheetReader("Sheet1")
 	f.Sheet.Store("xl/worksheets/sheet1.xml", ws)
 	f.Theme, _ = f.themeReader()
+	f.options = getOptions(opts...)
 	return f
 }
 

numfmt.go

@@ -32,6 +32,7 @@ type languageInfo struct {
 // numberFormat directly maps the number format parser runtime required
 // fields.
 type numberFormat struct {
+	opts                                                        *Options
 	cellType                                                    CellType
 	section                                                     []nfp.Section
 	t                                                           time.Time
@@ -396,9 +397,9 @@ func (nf *numberFormat) prepareNumberic(value string) {
 // format provides a function to return a string parse by number format
 // expression. If the given number format is not supported, this will return
 // the original cell value.
-func format(value, numFmt string, date1904 bool, cellType CellType) string {
+func format(value, numFmt string, date1904 bool, cellType CellType, opts *Options) string {
 	p := nfp.NumberFormatParser()
-	nf := numberFormat{section: p.Parse(numFmt), value: value, date1904: date1904, cellType: cellType}
+	nf := numberFormat{opts: opts, section: p.Parse(numFmt), value: value, date1904: date1904, cellType: cellType}
 	nf.number, nf.valueSectionType = nf.getValueSectionType(value)
 	nf.prepareNumberic(value)
 	for i, section := range nf.section {
@@ -480,7 +481,7 @@ func (nf *numberFormat) printNumberLiteral(text string) string {
 	}
 	for i, token := range nf.section[nf.sectionIdx].Items {
 		if token.TType == nfp.TokenTypeCurrencyLanguage {
-			if err := nf.currencyLanguageHandler(i, token); err != nil {
+			if err, changeNumFmtCode := nf.currencyLanguageHandler(i, token); err != nil || changeNumFmtCode {
 				return nf.value
 			}
 			result += nf.currencyString
@@ -616,7 +617,7 @@ func (nf *numberFormat) dateTimeHandler() string {
 	nf.t, nf.hours, nf.seconds = timeFromExcelTime(nf.number, nf.date1904), false, false
 	for i, token := range nf.section[nf.sectionIdx].Items {
 		if token.TType == nfp.TokenTypeCurrencyLanguage {
-			if err := nf.currencyLanguageHandler(i, token); err != nil {
+			if err, changeNumFmtCode := nf.currencyLanguageHandler(i, token); err != nil || changeNumFmtCode {
 				return nf.value
 			}
 			nf.result += nf.currencyString
@@ -687,16 +688,28 @@ func (nf *numberFormat) positiveHandler() string {
 
 // currencyLanguageHandler will be handling currency and language types tokens
 // for a number format expression.
-func (nf *numberFormat) currencyLanguageHandler(i int, token nfp.Token) (err error) {
+func (nf *numberFormat) currencyLanguageHandler(i int, token nfp.Token) (error, bool) {
 	for _, part := range token.Parts {
 		if inStrSlice(supportedTokenTypes, part.Token.TType, true) == -1 {
-			err = ErrUnsupportedNumberFormat
-			return
+			return ErrUnsupportedNumberFormat, false
 		}
 		if part.Token.TType == nfp.TokenSubTypeLanguageInfo {
+			if strings.EqualFold(part.Token.TValue, "F800") { // [$-x-sysdate]
+				if nf.opts != nil && nf.opts.LongDateFmtCode != "" {
+					nf.value = format(nf.value, nf.opts.LongDateFmtCode, nf.date1904, nf.cellType, nf.opts)
+					return nil, true
+				}
+				part.Token.TValue = "409"
+			}
+			if strings.EqualFold(part.Token.TValue, "F400") { // [$-x-systime]
+				if nf.opts != nil && nf.opts.LongTimeFmtCode != "" {
+					nf.value = format(nf.value, nf.opts.LongTimeFmtCode, nf.date1904, nf.cellType, nf.opts)
+					return nil, true
+				}
+				part.Token.TValue = "409"
+			}
 			if _, ok := supportedLanguageInfo[strings.ToUpper(part.Token.TValue)]; !ok {
-				err = ErrUnsupportedNumberFormat
-				return
+				return ErrUnsupportedNumberFormat, false
 			}
 			nf.localCode = strings.ToUpper(part.Token.TValue)
 		}
@@ -704,7 +717,7 @@ func (nf *numberFormat) currencyLanguageHandler(i int, token nfp.Token) (err err
 			nf.currencyString = part.Token.TValue
 		}
 	}
-	return
+	return nil, false
 }
 
 // localAmPm return AM/PM name by supported language ID.

numfmt_test.go

@@ -995,6 +995,8 @@ func TestNumFmt(t *testing.T) {
 		{"44835.18957170139", "[$-435]mmmmm dd yyyy  h:mm AM/PM", "O 01 2022  4:32 AM"},
 		{"44866.18957170139", "[$-435]mmmmm dd yyyy  h:mm AM/PM", "N 01 2022  4:32 AM"},
 		{"44896.18957170139", "[$-435]mmmmm dd yyyy  h:mm AM/PM", "D 01 2022  4:32 AM"},
+		{"43543.503206018519", "[$-F800]dddd, mmmm dd, yyyy", "Tuesday, March 19, 2019"},
+		{"43543.503206018519", "[$-F400]h:mm:ss AM/PM", "12:04:37 PM"},
 		{"text_", "General", "text_"},
 		{"text_", "\"=====\"@@@\"--\"@\"----\"", "=====text_text_text_--text_----"},
 		{"0.0450685976001E+21", "0_);[Red]\\(0\\)", "45068597600100000000"},
@@ -1061,9 +1063,22 @@ func TestNumFmt(t *testing.T) {
 		{"1234.5678", "0.0xxx00", "1234.5678"},
 		{"-1234.5678", "00000.00###;s;", "-1234.5678"},
 	} {
-		result := format(item[0], item[1], false, CellTypeNumber)
+		result := format(item[0], item[1], false, CellTypeNumber, nil)
 		assert.Equal(t, item[2], result, item)
 	}
+	// Test format number with specified date and time format code
+	for _, item := range [][]string{
+		{"43543.503206018519", "[$-F800]dddd, mmmm dd, yyyy", "2019年3月19日"},
+		{"43543.503206018519", "[$-F400]h:mm:ss AM/PM", "12:04:37"},
+	} {
+		result := format(item[0], item[1], false, CellTypeNumber, &Options{
+			ShortDateFmtCode: "yyyy/m/d",
+			LongDateFmtCode:  "yyyy\"年\"M\"月\"d\"日\"",
+			LongTimeFmtCode:  "H:mm:ss",
+		})
+		assert.Equal(t, item[2], result, item)
+	}
+	// Test format number with string data type cell value
 	for _, cellType := range []CellType{CellTypeSharedString, CellTypeInlineString} {
 		for _, item := range [][]string{
 			{"1234.5678", "General", "1234.5678"},
@@ -1073,10 +1088,12 @@ func TestNumFmt(t *testing.T) {
 			{"1234.5678", "0_);[Red]\\(0\\)", "1234.5678"},
 			{"1234.5678", "\"text\"@", "text1234.5678"},
 		} {
-			result := format(item[0], item[1], false, cellType)
+			result := format(item[0], item[1], false, cellType, nil)
 			assert.Equal(t, item[2], result, item)
 		}
 	}
 	nf := numberFormat{}
-	assert.Equal(t, ErrUnsupportedNumberFormat, nf.currencyLanguageHandler(0, nfp.Token{Parts: []nfp.Part{{}}}))
+	err, changeNumFmtCode := nf.currencyLanguageHandler(0, nfp.Token{Parts: []nfp.Part{{}}})
+	assert.Equal(t, ErrUnsupportedNumberFormat, err)
+	assert.False(t, changeNumFmtCode)
 }

rows_test.go

@@ -1117,6 +1117,15 @@ func TestNumberFormats(t *testing.T) {
 		assert.Equal(t, expected, result, cell)
 	}
 	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestNumberFormats.xlsx")))
+
+	f = NewFile(Options{ShortDateFmtCode: "yyyy/m/d"})
+	assert.NoError(t, f.SetCellValue("Sheet1", "A1", 43543.503206018519))
+	numFmt14, err := f.NewStyle(&Style{NumFmt: 14})
+	assert.NoError(t, err)
+	assert.NoError(t, f.SetCellStyle("Sheet1", "A1", "A1", numFmt14))
+	result, err := f.GetCellValue("Sheet1", "A1")
+	assert.NoError(t, err)
+	assert.Equal(t, "2019/3/19", result, "A1")
 }
 
 func BenchmarkRows(b *testing.B) {