This closes #301, support delete and add radio button form control

- New exported function `DeleteFormControl` has been added
- Update unit tests
- Fix comments was missing after form control added
- Update pull request templates

PULL_REQUEST_TEMPLATE.md

@@ -21,7 +21,7 @@
 
 <!--- Please describe in detail how you tested your changes. -->
 <!--- Include details of your testing environment, and the tests you ran to -->
-<!--- see how your change affects other areas of the code, etc. -->
+<!--- See how your change affects other areas of the code, etc. -->
 
 ## Types of changes
 

vml.go

@@ -28,6 +28,7 @@ type FormControlType byte
 const (
 	FormControlNote FormControlType = iota
 	FormControlButton
+	FormControlCheckbox
 	FormControlRadio
 )
 
@@ -114,8 +115,9 @@ func (f *File) AddComment(sheet string, opts Comment) error {
 	})
 }
 
-// DeleteComment provides the method to delete comment in a sheet by given
+// DeleteComment provides the method to delete comment in a worksheet by given
-// worksheet name. For example, delete the comment in Sheet1!$A$30:
+// worksheet name and cell reference. For example, delete the comment in
+// Sheet1!$A$30:
 //
 //	err := f.DeleteComment("Sheet1", "A30")
 func (f *File) DeleteComment(sheet, cell string) error {
@@ -315,6 +317,80 @@ func (f *File) AddFormControl(sheet string, opts FormControl) error {
 	})
 }
 
+// DeleteFormControl provides the method to delete form control in a worksheet
+// by given worksheet name and cell reference. For example, delete the form
+// control in Sheet1!$A$30:
+//
+//	err := f.DeleteFormControl("Sheet1", "A30")
+func (f *File) DeleteFormControl(sheet, cell string) error {
+	ws, err := f.workSheetReader(sheet)
+	if err != nil {
+		return err
+	}
+	col, row, err := CellNameToCoordinates(cell)
+	if err != nil {
+		return err
+	}
+	if ws.LegacyDrawing == nil {
+		return err
+	}
+	sheetRelationshipsDrawingVML := f.getSheetRelationshipsTargetByID(sheet, ws.LegacyDrawing.RID)
+	vmlID, _ := strconv.Atoi(strings.TrimSuffix(strings.TrimPrefix(sheetRelationshipsDrawingVML, "../drawings/vmlDrawing"), ".vml"))
+	drawingVML := strings.ReplaceAll(sheetRelationshipsDrawingVML, "..", "xl")
+	vml := f.VMLDrawing[drawingVML]
+	if vml == nil {
+		vml = &vmlDrawing{
+			XMLNSv:  "urn:schemas-microsoft-com:vml",
+			XMLNSo:  "urn:schemas-microsoft-com:office:office",
+			XMLNSx:  "urn:schemas-microsoft-com:office:excel",
+			XMLNSmv: "http://macVmlSchemaUri",
+			ShapeLayout: &xlsxShapeLayout{
+				Ext: "edit", IDmap: &xlsxIDmap{Ext: "edit", Data: vmlID},
+			},
+			ShapeType: &xlsxShapeType{
+				Stroke: &xlsxStroke{JoinStyle: "miter"},
+				VPath:  &vPath{GradientShapeOK: "t", ConnectType: "rect"},
+			},
+		}
+		// load exist VML shapes from xl/drawings/vmlDrawing%d.vml
+		d, err := f.decodeVMLDrawingReader(drawingVML)
+		if err != nil {
+			return err
+		}
+		if d != nil {
+			vml.ShapeType.ID = d.ShapeType.ID
+			vml.ShapeType.CoordSize = d.ShapeType.CoordSize
+			vml.ShapeType.Spt = d.ShapeType.Spt
+			vml.ShapeType.Path = d.ShapeType.Path
+			for _, v := range d.Shape {
+				s := xlsxShape{
+					ID:          v.ID,
+					Type:        v.Type,
+					Style:       v.Style,
+					Button:      v.Button,
+					Filled:      v.Filled,
+					FillColor:   v.FillColor,
+					InsetMode:   v.InsetMode,
+					Stroked:     v.Stroked,
+					StrokeColor: v.StrokeColor,
+					Val:         v.Val,
+				}
+				vml.Shape = append(vml.Shape, s)
+			}
+		}
+	}
+	for i, sp := range vml.Shape {
+		var shapeVal decodeShapeVal
+		if err = xml.Unmarshal([]byte(fmt.Sprintf("<shape>%s</shape>", sp.Val)), &shapeVal); err == nil &&
+			shapeVal.ClientData.ObjectType != "Note" && shapeVal.ClientData.Column == col-1 && shapeVal.ClientData.Row == row-1 {
+			vml.Shape = append(vml.Shape[:i], vml.Shape[i+1:]...)
+			break
+		}
+	}
+	f.VMLDrawing[drawingVML] = vml
+	return err
+}
+
 // countVMLDrawing provides a function to get VML drawing files count storage
 // in the folder xl/drawings.
 func (f *File) countVMLDrawing() int {
@@ -380,6 +456,8 @@ func (f *File) addVMLObject(opts vmlOptions) error {
 	}
 	drawingVML := "xl/drawings/vmlDrawing" + strconv.Itoa(vmlID) + ".vml"
 	sheetRelationshipsDrawingVML := "../drawings/vmlDrawing" + strconv.Itoa(vmlID) + ".vml"
+	sheetXMLPath, _ := f.getSheetXMLPath(opts.Sheet)
+	sheetRels := "xl/worksheets/_rels/" + strings.TrimPrefix(sheetXMLPath, "xl/worksheets/") + ".rels"
 	if ws.LegacyDrawing != nil {
 		// The worksheet already has a VML relationships, use the relationships drawing ../drawings/vmlDrawing%d.vml.
 		sheetRelationshipsDrawingVML = f.getSheetRelationshipsTargetByID(opts.Sheet, ws.LegacyDrawing.RID)
@@ -387,13 +465,7 @@ func (f *File) addVMLObject(opts vmlOptions) error {
 		drawingVML = strings.ReplaceAll(sheetRelationshipsDrawingVML, "..", "xl")
 	} else {
 		// Add first VML drawing for given sheet.
-		sheetXMLPath, _ := f.getSheetXMLPath(opts.Sheet)
-		sheetRels := "xl/worksheets/_rels/" + strings.TrimPrefix(sheetXMLPath, "xl/worksheets/") + ".rels"
 		rID := f.addRels(sheetRels, SourceRelationshipDrawingVML, sheetRelationshipsDrawingVML, "")
-		if !opts.FormCtrl {
-			sheetRelationshipsComments := "../comments" + strconv.Itoa(vmlID) + ".xml"
-			f.addRels(sheetRels, SourceRelationshipComments, sheetRelationshipsComments, "")
-		}
 		f.addSheetNameSpace(opts.Sheet, SourceRelationship)
 		f.addSheetLegacyDrawing(opts.Sheet, rID)
 	}
@@ -405,6 +477,10 @@ func (f *File) addVMLObject(opts vmlOptions) error {
 		if err = f.addComment(commentsXML, opts); err != nil {
 			return err
 		}
+		if sheetXMLPath, ok := f.getSheetXMLPath(opts.Sheet); ok && f.getSheetComments(filepath.Base(sheetXMLPath)) == "" {
+			sheetRelationshipsComments := "../comments" + strconv.Itoa(vmlID) + ".xml"
+			f.addRels(sheetRels, SourceRelationshipComments, sheetRelationshipsComments, "")
+		}
 	}
 	return f.addContentTypePart(vmlID, "comments")
 }
@@ -475,8 +551,7 @@ func formCtrlText(opts *vmlOptions) []vmlFont {
 	return font
 }
 
-var (
+var formCtrlPresets = map[FormControlType]struct {
-	formCtrlPresets = map[FormControlType]struct {
 	objectType   string
 	filled       string
 	fillColor    string
@@ -489,7 +564,7 @@ var (
 	noThreeD     *string
 	firstButton  *string
 	shadow       *vShadow
-	}{
+}{
 	FormControlNote: {
 		objectType:   "Note",
 		filled:       "",
@@ -528,6 +603,20 @@ var (
 		firstButton: nil,
 		shadow:      nil,
 	},
+	FormControlCheckbox: {
+		objectType:   "Checkbox",
+		filled:       "f",
+		fillColor:    "window [65]",
+		stroked:      "f",
+		strokeColor:  "windowText [64]",
+		strokeButton: "",
+		fill:         nil,
+		textHAlign:   "",
+		textVAlign:   "Center",
+		noThreeD:     stringPtr(""),
+		firstButton:  nil,
+		shadow:       nil,
+	},
 	FormControlRadio: {
 		objectType:   "Radio",
 		filled:       "f",
@@ -542,8 +631,7 @@ var (
 		firstButton:  stringPtr(""),
 		shadow:       nil,
 	},
-	}
+}
-)
 
 // addDrawingVML provides a function to create VML drawing XML as
 // xl/drawings/vmlDrawing%d.vml by given data ID, XML path and VML options. The
@@ -634,7 +722,7 @@ func (f *File) addDrawingVML(dataID int, drawingVML string, opts *vmlOptions) er
 	if opts.FormCtrl {
 		sp.ClientData.FmlaMacro = opts.Macro
 	}
-	if opts.Type == FormControlRadio && opts.Checked {
+	if (opts.Type == FormControlCheckbox || opts.Type == FormControlRadio) && opts.Checked {
 		sp.ClientData.Checked = stringPtr("1")
 	}
 	s, _ := xml.Marshal(sp)

vmlDrawing.go

@@ -172,6 +172,20 @@ type decodeShape struct {
 	Val         string `xml:",innerxml"`
 }
 
+// decodeShapeVal defines the structure used to parse the sub-element of the
+// shape in the file xl/drawings/vmlDrawing%d.vml.
+type decodeShapeVal struct {
+	ClientData decodeVMLClientData `xml:"ClientData"`
+}
+
+// decodeVMLClientData defines the structure used to parse the x:ClientData
+// element in the file xl/drawings/vmlDrawing%d.vml.
+type decodeVMLClientData struct {
+	ObjectType string `xml:"ObjectType,attr"`
+	Column     int
+	Row        int
+}
+
 // encodeShape defines the structure used to re-serialization shape element.
 type encodeShape struct {
 	Fill       *vFill       `xml:"v:fill"`

vml_test.go

@@ -155,7 +155,7 @@ func TestAddDrawingVML(t *testing.T) {
 	assert.EqualError(t, f.addDrawingVML(0, "xl/drawings/vmlDrawing1.vml", &vmlOptions{Cell: "A1"}), "XML syntax error on line 1: invalid UTF-8")
 }
 
-func TestAddFormControl(t *testing.T) {
+func TestFormControl(t *testing.T) {
 	f := NewFile()
 	assert.NoError(t, f.AddFormControl("Sheet1", FormControl{
 		Cell:  "D1",
@@ -185,12 +185,23 @@ func TestAddFormControl(t *testing.T) {
 	}))
 	assert.NoError(t, f.AddFormControl("Sheet1", FormControl{
 		Cell:    "A5",
+		Type:    FormControlCheckbox,
+		Text:    "Check Box 1",
+		Checked: true,
+	}))
+	assert.NoError(t, f.AddFormControl("Sheet1", FormControl{
+		Cell: "A6",
+		Type: FormControlCheckbox,
+		Text: "Check Box 2",
+	}))
+	assert.NoError(t, f.AddFormControl("Sheet1", FormControl{
+		Cell:    "A7",
 		Type:    FormControlRadio,
 		Text:    "Option Button 1",
 		Checked: true,
 	}))
 	assert.NoError(t, f.AddFormControl("Sheet1", FormControl{
-		Cell: "A6",
+		Cell: "A8",
 		Type: FormControlRadio,
 		Text: "Option Button 2",
 	}))
@@ -221,4 +232,24 @@ func TestAddFormControl(t *testing.T) {
 		Macro: "Button1_Click",
 	}), newNoExistSheetError("SheetN"))
 	assert.NoError(t, f.Close())
+	// Test delete form control
+	f, err = OpenFile(filepath.Join("test", "TestAddFormControl.xlsm"))
+	assert.NoError(t, err)
+	assert.NoError(t, f.DeleteFormControl("Sheet1", "D1"))
+	assert.NoError(t, f.DeleteFormControl("Sheet1", "A1"))
+	// Test delete form control on not exists worksheet
+	assert.Equal(t, f.DeleteFormControl("SheetN", "A1"), newNoExistSheetError("SheetN"))
+	// Test delete form control on not exists worksheet
+	assert.Equal(t, f.DeleteFormControl("Sheet1", "A"), newCellNameToCoordinatesError("A", newInvalidCellNameError("A")))
+	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestDeleteFormControl.xlsm")))
+	assert.NoError(t, f.Close())
+	// Test delete form control with expected element
+	f, err = OpenFile(filepath.Join("test", "TestAddFormControl.xlsm"))
+	assert.NoError(t, err)
+	f.Pkg.Store("xl/drawings/vmlDrawing1.vml", MacintoshCyrillicCharset)
+	assert.Error(t, f.DeleteFormControl("Sheet1", "A1"), "XML syntax error on line 1: invalid UTF-8")
+	assert.NoError(t, f.Close())
+	// Test delete form control on a worksheet without form control
+	f = NewFile()
+	assert.NoError(t, f.DeleteFormControl("Sheet1", "A1"))
 }