Resolve qax-os#32, fix missing leading/leading spaces when working with SST

Author: xuri

cell.go

@@ -15,7 +15,6 @@ import (
 	"encoding/xml"
 	"errors"
 	"fmt"
-	"html"
 	"reflect"
 	"strconv"
 	"strings"
@@ -274,23 +273,16 @@ func (f *File) SetCellStr(sheet, axis, value string) error {
 		return err
 	}
 	cellData.S = f.prepareCellStyle(xlsx, col, cellData.S)
-	cellData.T, cellData.V, cellData.XMLSpace = f.setCellString(value)
+	cellData.T, cellData.V = f.setCellString(value)
 	return err
 }
 
 // setCellString provides a function to set string type to shared string
 // table.
-func (f *File) setCellString(value string) (t string, v string, ns xml.Attr) {
+func (f *File) setCellString(value string) (t string, v string) {
 	if len(value) > TotalCellChars {
 		value = value[0:TotalCellChars]
 	}
-	// Leading and ending space(s) character detection.
-	if len(value) > 0 && (value[0] == 32 || value[len(value)-1] == 32) {
-		ns = xml.Attr{
-			Name:  xml.Name{Space: NameSpaceXML, Local: "space"},
-			Value: "preserve",
-		}
-	}
 	t = "s"
 	v = strconv.Itoa(f.setSharedString(value))
 	return
@@ -304,7 +296,16 @@ func (f *File) setSharedString(val string) int {
 	}
 	sst.Count++
 	sst.UniqueCount++
-	sst.SI = append(sst.SI, xlsxSI{T: val})
+	t := xlsxT{Val: val}
+	// Leading and ending space(s) character detection.
+	if len(val) > 0 && (val[0] == 32 || val[len(val)-1] == 32) {
+		ns := xml.Attr{
+			Name:  xml.Name{Space: NameSpaceXML, Local: "space"},
+			Value: "preserve",
+		}
+		t.Space = ns
+	}
+	sst.SI = append(sst.SI, xlsxSI{T: &t})
 	f.sharedStringsMap[val] = sst.UniqueCount - 1
 	return sst.UniqueCount - 1
 }
@@ -620,7 +621,7 @@ func (f *File) SetCellRichText(sheet, cell string, runs []RichTextRun) error {
 	sst := f.sharedStringsReader()
 	textRuns := []xlsxR{}
 	for _, textRun := range runs {
-		run := xlsxR{T: &xlsxT{Val: html.EscapeString(textRun.Text)}}
+		run := xlsxR{T: &xlsxT{Val: textRun.Text}}
 		if strings.ContainsAny(textRun.Text, "\r\n ") {
 			run.T.Space = xml.Attr{Name: xml.Name{Space: NameSpaceXML, Local: "space"}, Value: "preserve"}
 		}

rows.go

@@ -292,8 +292,8 @@ func (f *File) sharedStringsReader() *xlsxSST {
 		}
 		f.SharedStrings = &sharedStrings
 		for i := range sharedStrings.SI {
-			if sharedStrings.SI[i].T != "" {
-				f.sharedStringsMap[sharedStrings.SI[i].T] = i
+			if sharedStrings.SI[i].T != nil {
+				f.sharedStringsMap[sharedStrings.SI[i].T.Val] = i
 			}
 		}
 		f.addContentTypePart(0, "sharedStrings")

xmlSharedStrings.go

@@ -38,7 +38,7 @@ type xlsxSST struct {
 // level - then the string item shall consist of multiple rich text runs which
 // collectively are used to express the string.
 type xlsxSI struct {
-	T string  `xml:"t,omitempty"`
+	T *xlsxT  `xml:"t,omitempty"`
 	R []xlsxR `xml:"r"`
 }
 
@@ -53,7 +53,10 @@ func (x xlsxSI) String() string {
 		}
 		return rows.String()
 	}
-	return x.T
+	if x.T != nil {
+		return x.T.Val
+	}
+	return ""
 }
 
 // xlsxR represents a run of rich text. A rich text run is a region of text
@@ -69,7 +72,7 @@ type xlsxR struct {
 type xlsxT struct {
 	XMLName xml.Name `xml:"t"`
 	Space   xml.Attr `xml:"space,attr,omitempty"`
-	Val     string   `xml:",innerxml"`
+	Val     string   `xml:",chardata"`
 }
 
 // xlsxRPr (Run Properties) specifies a set of run properties which shall be