115 lines
3.3 KiB
Go
115 lines
3.3 KiB
Go
// Copyright 2016 - 2019 The excelize Authors. All rights reserved. Use of
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// this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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//
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// Package excelize providing a set of functions that allow you to write to
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// and read from XLSX files. Support reads and writes XLSX file generated by
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// Microsoft Excel™ 2007 and later. Support save file without losing original
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// charts of XLSX. This library needs Go version 1.8 or later.
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package excelize
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import (
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"archive/zip"
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"bytes"
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"fmt"
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"io"
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"os"
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)
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// NewFile provides a function to create new file by default template. For
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// example:
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//
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// xlsx := NewFile()
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//
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func NewFile() *File {
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file := make(map[string][]byte)
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file["_rels/.rels"] = []byte(XMLHeader + templateRels)
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file["docProps/app.xml"] = []byte(XMLHeader + templateDocpropsApp)
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file["docProps/core.xml"] = []byte(XMLHeader + templateDocpropsCore)
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file["xl/_rels/workbook.xml.rels"] = []byte(XMLHeader + templateWorkbookRels)
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file["xl/theme/theme1.xml"] = []byte(XMLHeader + templateTheme)
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file["xl/worksheets/sheet1.xml"] = []byte(XMLHeader + templateSheet)
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file["xl/styles.xml"] = []byte(XMLHeader + templateStyles)
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file["xl/workbook.xml"] = []byte(XMLHeader + templateWorkbook)
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file["[Content_Types].xml"] = []byte(XMLHeader + templateContentTypes)
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f := &File{
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sheetMap: make(map[string]string),
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Sheet: make(map[string]*xlsxWorksheet),
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SheetCount: 1,
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XLSX: file,
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}
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f.CalcChain = f.calcChainReader()
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f.Comments = make(map[string]*xlsxComments)
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f.ContentTypes = f.contentTypesReader()
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f.Styles = f.stylesReader()
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f.DecodeVMLDrawing = make(map[string]*decodeVmlDrawing)
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f.VMLDrawing = make(map[string]*vmlDrawing)
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f.WorkBook = f.workbookReader()
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f.WorkBookRels = f.workbookRelsReader()
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f.Sheet["xl/worksheets/sheet1.xml"] = f.workSheetReader("Sheet1")
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f.sheetMap["Sheet1"] = "xl/worksheets/sheet1.xml"
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f.Theme = f.themeReader()
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return f
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}
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// Save provides a function to override the xlsx file with origin path.
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func (f *File) Save() error {
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if f.Path == "" {
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return fmt.Errorf("no path defined for file, consider File.WriteTo or File.Write")
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}
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return f.SaveAs(f.Path)
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}
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// SaveAs provides a function to create or update to an xlsx file at the
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// provided path.
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func (f *File) SaveAs(name string) error {
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file, err := os.OpenFile(name, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0666)
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if err != nil {
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return err
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}
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defer file.Close()
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return f.Write(file)
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}
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// Write provides a function to write to an io.Writer.
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func (f *File) Write(w io.Writer) error {
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_, err := f.WriteTo(w)
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return err
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}
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// WriteTo implements io.WriterTo to write the file.
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func (f *File) WriteTo(w io.Writer) (int64, error) {
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buf, err := f.WriteToBuffer()
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if err != nil {
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return 0, err
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}
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return buf.WriteTo(w)
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}
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// WriteToBuffer provides a function to get bytes.Buffer from the saved file.
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func (f *File) WriteToBuffer() (*bytes.Buffer, error) {
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buf := new(bytes.Buffer)
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zw := zip.NewWriter(buf)
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f.calcChainWriter()
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f.commentsWriter()
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f.contentTypesWriter()
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f.vmlDrawingWriter()
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f.workbookWriter()
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f.workbookRelsWriter()
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f.worksheetWriter()
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f.styleSheetWriter()
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for path, content := range f.XLSX {
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fi, err := zw.Create(path)
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if err != nil {
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return buf, err
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}
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_, err = fi.Write(content)
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if err != nil {
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return buf, err
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}
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}
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return buf, zw.Close()
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}
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