Resolve qax-os#404, get sheet map by target rels.

sheet.go

@@ -369,12 +369,18 @@ func (f *File) GetSheetMap() map[int]string {
 	return sheetMap
 }
 
-// getSheetMap provides a function to get worksheet name and XML file path map of
-// XLSX.
+// getSheetMap provides a function to get worksheet name and XML file path map
+// of XLSX.
 func (f *File) getSheetMap() map[string]string {
-	maps := make(map[string]string)
-	for idx, name := range f.GetSheetMap() {
-		maps[name] = "xl/worksheets/sheet" + strconv.Itoa(idx) + ".xml"
+	content := f.workbookReader()
+	rels := f.workbookRelsReader()
+	maps := map[string]string{}
+	for _, v := range content.Sheets.Sheet {
+		for _, rel := range rels.Relationships {
+			if rel.ID == v.ID {
+				maps[v.Name] = fmt.Sprintf("xl/%s", rel.Target)
+			}
+		}
 	}
 	return maps
 }

styles.go

@@ -1895,11 +1895,8 @@ func (f *File) NewStyle(style string) (int, error) {
 	numFmtID := setNumFmt(s, fs)
 
 	if fs.Font != nil {
-		font, _ := xml.Marshal(setFont(fs))
 		s.Fonts.Count++
-		s.Fonts.Font = append(s.Fonts.Font, &xlsxFont{
-			Font: string(font[6 : len(font)-7]),
-		})
+		s.Fonts.Font = append(s.Fonts.Font, setFont(fs))
 		fontID = s.Fonts.Count - 1
 	}
 
@@ -1950,15 +1947,15 @@ func (f *File) NewConditionalStyle(style string) (int, error) {
 
 // setFont provides a function to add font style by given cell format
 // settings.
-func setFont(formatStyle *formatStyle) *font {
+func setFont(formatStyle *formatStyle) *xlsxFont {
 	fontUnderlineType := map[string]string{"single": "single", "double": "double"}
 	if formatStyle.Font.Size < 1 {
 		formatStyle.Font.Size = 11
 	}
 	if formatStyle.Font.Color == "" {
 		formatStyle.Font.Color = "#000000"
 	}
-	f := font{
+	f := xlsxFont{
 		B:      formatStyle.Font.Bold,
 		I:      formatStyle.Font.Italic,
 		Sz:     &attrValInt{Val: formatStyle.Font.Size},

xmlStyles.go

@@ -82,8 +82,9 @@ type xlsxFonts struct {
 	Font  []*xlsxFont `xml:"font"`
 }
 
-// font directly maps the font element.
-type font struct {
+// xlsxFont directly maps the font element. This element defines the
+// properties for one of the fonts used in this workbook.
+type xlsxFont struct {
 	Name     *attrValString `xml:"name"`
 	Charset  *attrValInt    `xml:"charset"`
 	Family   *attrValInt    `xml:"family"`
@@ -100,12 +101,6 @@ type font struct {
 	Scheme   *attrValString `xml:"scheme"`
 }
 
-// xlsxFont directly maps the font element. This element defines the properties
-// for one of the fonts used in this workbook.
-type xlsxFont struct {
-	Font string `xml:",innerxml"`
-}
-
 // xlsxFills directly maps the fills element. This element defines the cell
 // fills portion of the Styles part, consisting of a sequence of fill records. A
 // cell fill consists of a background color, foreground color, and pattern to be
@@ -262,7 +257,7 @@ type xlsxDxf struct {
 
 // dxf directly maps the dxf element.
 type dxf struct {
-	Font       *font           `xml:"font"`
+	Font       *xlsxFont       `xml:"font"`
 	NumFmt     *xlsxNumFmt     `xml:"numFmt"`
 	Fill       *xlsxFill       `xml:"fill"`
 	Alignment  *xlsxAlignment  `xml:"alignment"`

xmlWorkbook.go

@@ -146,9 +146,8 @@ type xlsxSheets struct {
 	Sheet []xlsxSheet `xml:"sheet"`
 }
 
-// xlsxSheet directly maps the sheet element from the namespace
-// http://schemas.openxmlformats.org/spreadsheetml/2006/main - currently I have
-// not checked it for completeness - it does as much as I need.
+// xlsxSheet defines a sheet in this workbook. Sheet data is stored in a
+// separate part.
 type xlsxSheet struct {
 	Name    string `xml:"name,attr,omitempty"`
 	SheetID int    `xml:"sheetId,attr,omitempty"`