Fixes #310, support set and get TopLeftCell properties of sheet view options

sheetview.go

@@ -35,6 +35,8 @@ type (
 	ShowRowColHeaders bool
 	// ZoomScale is a SheetViewOption.
 	ZoomScale float64
+	// TopLeftCell is a SheetViewOption.
+	TopLeftCell string
 	/* TODO
 	// ShowWhiteSpace is a SheetViewOption.
 	ShowWhiteSpace bool
@@ -47,6 +49,14 @@ type (
 
 // Defaults for each option are described in XML schema for CT_SheetView
 
+func (o TopLeftCell) setSheetViewOption(view *xlsxSheetView) {
+	view.TopLeftCell = string(o)
+}
+
+func (o *TopLeftCell) getSheetViewOption(view *xlsxSheetView) {
+	*o = TopLeftCell(string(view.TopLeftCell))
+}
+
 func (o DefaultGridColor) setSheetViewOption(view *xlsxSheetView) {
 	view.DefaultGridColor = boolPtr(bool(o))
 }

sheetview_test.go

@@ -13,12 +13,14 @@ var _ = []excelize.SheetViewOption{
 	excelize.ShowFormulas(false),
 	excelize.ShowGridLines(true),
 	excelize.ShowRowColHeaders(true),
+	excelize.TopLeftCell("B2"),
 	// SheetViewOptionPtr are also SheetViewOption
 	new(excelize.DefaultGridColor),
 	new(excelize.RightToLeft),
 	new(excelize.ShowFormulas),
 	new(excelize.ShowGridLines),
 	new(excelize.ShowRowColHeaders),
+	new(excelize.TopLeftCell),
 }
 
 var _ = []excelize.SheetViewOptionPtr{
@@ -27,6 +29,7 @@ var _ = []excelize.SheetViewOptionPtr{
 	(*excelize.ShowFormulas)(nil),
 	(*excelize.ShowGridLines)(nil),
 	(*excelize.ShowRowColHeaders)(nil),
+	(*excelize.TopLeftCell)(nil),
 }
 
 func ExampleFile_SetSheetViewOptions() {
@@ -40,6 +43,7 @@ func ExampleFile_SetSheetViewOptions() {
 		excelize.ShowGridLines(true),
 		excelize.ShowRowColHeaders(true),
 		excelize.ZoomScale(80),
+		excelize.TopLeftCell("C3"),
 	); err != nil {
 		panic(err)
 	}
@@ -91,6 +95,7 @@ func ExampleFile_GetSheetViewOptions() {
 		showGridLines     excelize.ShowGridLines
 		showRowColHeaders excelize.ShowRowColHeaders
 		zoomScale         excelize.ZoomScale
+		topLeftCell       excelize.TopLeftCell
 	)
 
 	if err := xl.GetSheetViewOptions(sheet, 0,
@@ -100,6 +105,7 @@ func ExampleFile_GetSheetViewOptions() {
 		&showGridLines,
 		&showRowColHeaders,
 		&zoomScale,
+		&topLeftCell,
 	); err != nil {
 		panic(err)
 	}
@@ -111,6 +117,15 @@ func ExampleFile_GetSheetViewOptions() {
 	fmt.Println("- showGridLines:", showGridLines)
 	fmt.Println("- showRowColHeaders:", showRowColHeaders)
 	fmt.Println("- zoomScale:", zoomScale)
+	fmt.Println("- topLeftCell:", `"`+topLeftCell+`"`)
+
+	if err := xl.SetSheetViewOptions(sheet, 0, excelize.TopLeftCell("B2")); err != nil {
+		panic(err)
+	}
+
+	if err := xl.GetSheetViewOptions(sheet, 0, &topLeftCell); err != nil {
+		panic(err)
+	}
 
 	if err := xl.SetSheetViewOptions(sheet, 0, excelize.ShowGridLines(false)); err != nil {
 		panic(err)
@@ -122,6 +137,7 @@ func ExampleFile_GetSheetViewOptions() {
 
 	fmt.Println("After change:")
 	fmt.Println("- showGridLines:", showGridLines)
+	fmt.Println("- topLeftCell:", topLeftCell)
 
 	// Output:
 	// Default:
@@ -131,8 +147,10 @@ func ExampleFile_GetSheetViewOptions() {
 	// - showGridLines: true
 	// - showRowColHeaders: true
 	// - zoomScale: 0
+	// - topLeftCell: ""
 	// After change:
 	// - showGridLines: false
+	// - topLeftCell: B2
 }
 
 func TestSheetViewOptionsErrors(t *testing.T) {