refactor: handler error instead of panic,

Exported functions:

SetCellStyle
InsertCol
RemoveCol
RemoveRow
InsertRow
DuplicateRow
DuplicateRowTo
SetRowHeight
GetRowHeight
GetCellValue
GetCellFormula
GetCellHyperLink
SetCellHyperLink
SetCellInt
SetCellBool
SetCellFloat
SetCellStr
SetCellDefault
GetCellStyle
SetCellValue
MergeCell
SetSheetRow
SetRowVisible
GetRowVisible
SetRowOutlineLevel
GetRowOutlineLevel
GetRows
Columns
SearchSheet
AddTable
GetPicture
AutoFilter
GetColVisible
SetColVisible
GetColOutlineLevel
SetColOutlineLevel
SetColWidth
GetColWidth

inner functions:

adjustHelper
adjustMergeCells
adjustAutoFilter
prepareCell
setDefaultTimeStyle
timeToExcelTime
addDrawingChart
addDrawingVML
addDrawingPicture
getTotalRowsCols
checkRow
addDrawingShape
addTable

1 files changed, 9 insertions, 3 deletions

diff --git a/excelize.go b/excelize.go
index 7a50460..857f3ac 100644
--- a/excelize.go
+++ b/excelize.go
@@ -98,11 +98,16 @@ func OpenReader(r io.Reader) (*File, error) {
 // setDefaultTimeStyle provides a function to set default numbers format for
 // time.Time type cell value by given worksheet name, cell coordinates and
 // number format code.
-func (f *File) setDefaultTimeStyle(sheet, axis string, format int) {
-	if f.GetCellStyle(sheet, axis) == 0 {
+func (f *File) setDefaultTimeStyle(sheet, axis string, format int) error {
+	s, err := f.GetCellStyle(sheet, axis)
+	if err != nil {
+		return err
+	}
+	if s == 0 {
 		style, _ := f.NewStyle(`{"number_format": ` + strconv.Itoa(format) + `}`)
 		f.SetCellStyle(sheet, axis, axis, style)
 	}
+	return err
 }
 
 // workSheetReader provides a function to get the pointer to the structure
@@ -218,7 +223,8 @@ func (f *File) GetMergeCells(sheet string) []MergeCell {
 		for i := range xlsx.MergeCells.Cells {
 			ref := xlsx.MergeCells.Cells[i].Ref
 			axis := strings.Split(ref, ":")[0]
-			mergeCells = append(mergeCells, []string{ref, f.GetCellValue(sheet, axis)})
+			val, _ := f.GetCellValue(sheet, axis)
+			mergeCells = append(mergeCells, []string{ref, val})
 		}
 	}