Update comments for the xmlNewDecoder (#542)

excelize.go

@@ -66,7 +66,7 @@ func OpenFile(filename string) (*File, error) {
 	return f, nil
 }
 
-// object builder
+// newFile is object builder
 func newFile() *File {
 	return &File{
 		checked:          make(map[string]bool),
@@ -117,10 +117,11 @@ func OpenReader(r io.Reader) (*File, error) {
 	return f, nil
 }
 
-// CharsetTranscoder Set user defined codepage transcoder function for open XLSX from non UTF-8 encoding
+// CharsetTranscoder Set user defined codepage transcoder function for open
+// XLSX from non UTF-8 encoding.
 func (f *File) CharsetTranscoder(fn charsetTranscoderFn) *File { f.CharsetReader = fn; return f }
 
-// Creates new XML decoder with charset reader
+// Creates new XML decoder with charset reader.
 func (f *File) xmlNewDecoder(rdr io.Reader) (ret *xml.Decoder) {
 	ret = xml.NewDecoder(rdr)
 	ret.CharsetReader = f.CharsetReader

rows.go

@@ -283,7 +283,10 @@ func (xlsx *xlsxC) getValueFrom(f *File, d *xlsxSST) (string, error) {
 	case "s":
 		xlsxSI := 0
 		xlsxSI, _ = strconv.Atoi(xlsx.V)
-		return f.formattedValue(xlsx.S, d.SI[xlsxSI].String()), nil
+		if len(d.SI) > xlsxSI {
+			return f.formattedValue(xlsx.S, d.SI[xlsxSI].String()), nil
+		}
+		return f.formattedValue(xlsx.S, xlsx.V), nil
 	case "str":
 		return f.formattedValue(xlsx.S, xlsx.V), nil
 	case "inlineStr":

sheet.go

@@ -163,7 +163,7 @@ func (f *File) setContentTypes(index int) {
 func (f *File) setSheet(index int, name string) {
 	xlsx := xlsxWorksheet{
 		Dimension: &xlsxDimension{Ref: "A1"},
-		SheetViews: xlsxSheetViews{
+		SheetViews: &xlsxSheetViews{
 			SheetView: []xlsxSheetView{{WorkbookViewID: 0}},
 		},
 	}

xmlWorksheet.go

@@ -18,7 +18,7 @@ type xlsxWorksheet struct {
 	XMLName               xml.Name                     `xml:"http://schemas.openxmlformats.org/spreadsheetml/2006/main worksheet"`
 	SheetPr               *xlsxSheetPr                 `xml:"sheetPr"`
 	Dimension             *xlsxDimension               `xml:"dimension"`
-	SheetViews            xlsxSheetViews               `xml:"sheetViews"`
+	SheetViews            *xlsxSheetViews              `xml:"sheetViews"`
 	SheetFormatPr         *xlsxSheetFormatPr           `xml:"sheetFormatPr"`
 	Cols                  *xlsxCols                    `xml:"cols"`
 	SheetData             xlsxSheetData                `xml:"sheetData"`