RichTextRun support set superscript and subscript by vertAlign attribute (qax-os#1252)

check vertical align enumeration, update set rich text docs and test

Author: MichealJl

cell.go

@@ -848,7 +848,10 @@ func newRpr(fnt *Font) *xlsxRPr {
 	if fnt.Family != "" {
 		rpr.RFont = &attrValString{Val: &fnt.Family}
 	}
-	if fnt.Size > 0.0 {
+	if inStrSlice([]string{"baseline", "superscript", "subscript"}, fnt.VertAlign, true) != -1 {
+		rpr.VertAlign = &attrValString{Val: &fnt.VertAlign}
+	}
+	if fnt.Size > 0 {
 		rpr.Sz = &attrValFloat{Val: &fnt.Size}
 	}
 	if fnt.Color != "" {
@@ -895,7 +898,7 @@ func newRpr(fnt *Font) *xlsxRPr {
 //                },
 //            },
 //            {
-//                Text: " italic",
+//                Text: "italic ",
 //                Font: &excelize.Font{
 //                    Bold:   true,
 //                    Color:  "e83723",
@@ -926,19 +929,34 @@ func newRpr(fnt *Font) *xlsxRPr {
 //                },
 //            },
 //            {
+//                Text: " superscript",
+//                Font: &excelize.Font{
+//                    Color:     "dbc21f",
+//                    VertAlign: "superscript",
+//                },
+//            },
+//            {
 //                Text: " and ",
 //                Font: &excelize.Font{
-//                    Size:  14,
-//                    Color: "ad23e8",
+//                    Size:      14,
+//                    Color:     "ad23e8",
+//                    VertAlign: "baseline",
 //                },
 //            },
 //            {
-//                Text: "underline.",
+//                Text: "underline",
 //                Font: &excelize.Font{
 //                    Color:     "23e833",
 //                    Underline: "single",
 //                },
 //            },
+//            {
+//                Text: " subscript.",
+//                Font: &excelize.Font{
+//                    Color:     "017505",
+//                    VertAlign: "subscript",
+//                },
+//            },
 //        }); err != nil {
 //            fmt.Println(err)
 //            return

cell_test.go

@@ -590,7 +590,7 @@ func TestSetCellRichText(t *testing.T) {
 			},
 		},
 		{
-			Text: "text with color and font-family,",
+			Text: "text with color and font-family, ",
 			Font: &Font{
 				Bold:   true,
 				Color:  "2354e8",
@@ -611,20 +611,35 @@ func TestSetCellRichText(t *testing.T) {
 				Strike: true,
 			},
 		},
+		{
+			Text: " superscript",
+			Font: &Font{
+				Color:     "dbc21f",
+				VertAlign: "superscript",
+			},
+		},
 		{
 			Text: " and ",
 			Font: &Font{
-				Size:  14,
-				Color: "ad23e8",
+				Size:      14,
+				Color:     "ad23e8",
+				VertAlign: "BASELINE",
 			},
 		},
 		{
-			Text: "underline.",
+			Text: "underline",
 			Font: &Font{
 				Color:     "23e833",
 				Underline: "single",
 			},
 		},
+		{
+			Text: " subscript.",
+			Font: &Font{
+				Color:     "017505",
+				VertAlign: "subscript",
+			},
+		},
 	}
 	assert.NoError(t, f.SetCellRichText("Sheet1", "A1", richTextRun))
 	assert.NoError(t, f.SetCellRichText("Sheet1", "A2", richTextRun))

xmlStyles.go

@@ -341,6 +341,7 @@ type Font struct {
 	Size      float64 `json:"size"`
 	Strike    bool    `json:"strike"`
 	Color     string  `json:"color"`
+	VertAlign string  `json:"vertAlign"`
 }
 
 // Fill directly maps the fill settings of the cells.