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file.go
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file.go
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package xlsx
import (
"archive/zip"
"encoding/xml"
"fmt"
"io"
"os"
"strconv"
)
// File is a high level structure providing a slice of Sheet structs
// to the user.
type File struct {
worksheets map[string]*zip.File
referenceTable *RefTable
Date1904 bool
styles *xlsxStyleSheet
Sheets []*Sheet
Sheet map[string]*Sheet
theme *theme
}
// Create a new File
func NewFile() (file *File) {
file = &File{}
file.Sheet = make(map[string]*Sheet)
file.Sheets = make([]*Sheet, 0)
return
}
// OpenFile() take the name of an XLSX file and returns a populated
// xlsx.File struct for it.
func OpenFile(filename string) (file *File, err error) {
var f *zip.ReadCloser
f, err = zip.OpenReader(filename)
if err != nil {
return nil, err
}
file, err = ReadZip(f)
return
}
// A convenient wrapper around File.ToSlice, FileToSlice will
// return the raw data contained in an Excel XLSX file as three
// dimensional slice. The first index represents the sheet number,
// the second the row number, and the third the cell number.
//
// For example:
//
// var mySlice [][][]string
// var value string
// mySlice = xlsx.FileToSlice("myXLSX.xlsx")
// value = mySlice[0][0][0]
//
// Here, value would be set to the raw value of the cell A1 in the
// first sheet in the XLSX file.
func FileToSlice(path string) ([][][]string, error) {
f, err := OpenFile(path)
if err != nil {
return nil, err
}
return f.ToSlice()
}
// Save the File to an xlsx file at the provided path.
func (f *File) Save(path string) (err error) {
var target *os.File
target, err = os.Create(path)
if err != nil {
return
}
err = f.Write(target)
if err != nil {
return
}
return target.Close()
}
// Write the File to io.Writer as xlsx
func (f *File) Write(writer io.Writer) (err error) {
var parts map[string]string
var zipWriter *zip.Writer
parts, err = f.MarshallParts()
if err != nil {
return
}
zipWriter = zip.NewWriter(writer)
for partName, part := range parts {
var writer io.Writer
writer, err = zipWriter.Create(partName)
if err != nil {
return
}
_, err = writer.Write([]byte(part))
if err != nil {
return
}
}
err = zipWriter.Close()
return
}
// Add a new Sheet, with the provided name, to a File
func (f *File) AddSheet(sheetName string) (sheet *Sheet) {
sheet = &Sheet{Name: sheetName, File: f}
f.Sheet[sheetName] = sheet
f.Sheets = append(f.Sheets, sheet)
return sheet
}
func (f *File) makeWorkbook() xlsxWorkbook {
var workbook xlsxWorkbook
workbook = xlsxWorkbook{}
workbook.FileVersion = xlsxFileVersion{}
workbook.FileVersion.AppName = "Go XLSX"
workbook.WorkbookPr = xlsxWorkbookPr{
BackupFile: false,
ShowObjects: "all"}
workbook.BookViews = xlsxBookViews{}
workbook.BookViews.WorkBookView = make([]xlsxWorkBookView, 1)
workbook.BookViews.WorkBookView[0] = xlsxWorkBookView{
ActiveTab: 0,
FirstSheet: 0,
ShowHorizontalScroll: true,
ShowSheetTabs: true,
ShowVerticalScroll: true,
TabRatio: 204,
WindowHeight: 8192,
WindowWidth: 16384,
XWindow: "0",
YWindow: "0"}
workbook.Sheets = xlsxSheets{}
workbook.Sheets.Sheet = make([]xlsxSheet, len(f.Sheets))
workbook.CalcPr.IterateCount = 100
workbook.CalcPr.RefMode = "A1"
workbook.CalcPr.Iterate = false
workbook.CalcPr.IterateDelta = 0.001
return workbook
}
// Construct a map of file name to XML content representing the file
// in terms of the structure of an XLSX file.
func (f *File) MarshallParts() (map[string]string, error) {
var parts map[string]string
var refTable *RefTable = NewSharedStringRefTable()
refTable.isWrite = true
var workbookRels WorkBookRels = make(WorkBookRels)
var err error
var workbook xlsxWorkbook
var types xlsxTypes = MakeDefaultContentTypes()
marshal := func(thing interface{}) (string, error) {
body, err := xml.Marshal(thing)
if err != nil {
return "", err
}
return xml.Header + string(body), nil
}
parts = make(map[string]string)
workbook = f.makeWorkbook()
sheetIndex := 1
if f.styles == nil {
f.styles = newXlsxStyleSheet(f.theme)
}
f.styles.reset()
for _, sheet := range f.Sheets {
xSheet := sheet.makeXLSXSheet(refTable, f.styles)
rId := fmt.Sprintf("rId%d", sheetIndex)
sheetId := strconv.Itoa(sheetIndex)
sheetPath := fmt.Sprintf("worksheets/sheet%d.xml", sheetIndex)
partName := "xl/" + sheetPath
types.Overrides = append(
types.Overrides,
xlsxOverride{
PartName: "/" + partName,
ContentType: "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"})
workbookRels[rId] = sheetPath
workbook.Sheets.Sheet[sheetIndex-1] = xlsxSheet{
Name: sheet.Name,
SheetId: sheetId,
Id: rId,
State: "visible"}
parts[partName], err = marshal(xSheet)
if err != nil {
return parts, err
}
sheetIndex++
}
parts["xl/workbook.xml"], err = marshal(workbook)
if err != nil {
return parts, err
}
parts["_rels/.rels"] = TEMPLATE__RELS_DOT_RELS
parts["docProps/app.xml"] = TEMPLATE_DOCPROPS_APP
// TODO - do this properly, modification and revision information
parts["docProps/core.xml"] = TEMPLATE_DOCPROPS_CORE
parts["xl/theme/theme1.xml"] = TEMPLATE_XL_THEME_THEME
xSST := refTable.makeXLSXSST()
parts["xl/sharedStrings.xml"], err = marshal(xSST)
if err != nil {
return parts, err
}
xWRel := workbookRels.MakeXLSXWorkbookRels()
parts["xl/_rels/workbook.xml.rels"], err = marshal(xWRel)
if err != nil {
return parts, err
}
parts["[Content_Types].xml"], err = marshal(types)
if err != nil {
return parts, err
}
parts["xl/styles.xml"], err = f.styles.Marshal()
if err != nil {
return parts, err
}
return parts, nil
}
// Return the raw data contained in the File as three
// dimensional slice. The first index represents the sheet number,
// the second the row number, and the third the cell number.
//
// For example:
//
// var mySlice [][][]string
// var value string
// mySlice = xlsx.FileToSlice("myXLSX.xlsx")
// value = mySlice[0][0][0]
//
// Here, value would be set to the raw value of the cell A1 in the
// first sheet in the XLSX file.
func (file *File) ToSlice() (output [][][]string, err error) {
output = [][][]string{}
for _, sheet := range file.Sheets {
s := [][]string{}
for _, row := range sheet.Rows {
if row == nil {
continue
}
r := []string{}
for _, cell := range row.Cells {
r = append(r, cell.String())
}
s = append(s, r)
}
output = append(output, s)
}
return output, nil
}