// Copyright 2016 - 2023 The excelize Authors. All rights reserved. Use of // this source code is governed by a BSD-style license that can be found in // the LICENSE file. // // Package excelize providing a set of functions that allow you to write to and // read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and // writing spreadsheet documents generated by Microsoft Excelâ„¢ 2007 and later. // Supports complex components by high compatibility, and provided streaming // API for generating or reading data from a worksheet with huge amounts of // data. This library needs Go version 1.16 or later. package excelize import ( "bytes" "encoding/xml" "io" ) // calcChainReader provides a function to get the pointer to the structure // after deserialization of xl/calcChain.xml. func (f *File) calcChainReader() (*xlsxCalcChain, error) { if f.CalcChain == nil { f.CalcChain = new(xlsxCalcChain) if err := f.xmlNewDecoder(bytes.NewReader(namespaceStrictToTransitional(f.readXML(defaultXMLPathCalcChain)))). Decode(f.CalcChain); err != nil && err != io.EOF { return f.CalcChain, err } } return f.CalcChain, nil } // calcChainWriter provides a function to save xl/calcChain.xml after // serialize structure. func (f *File) calcChainWriter() { if f.CalcChain != nil && f.CalcChain.C != nil { output, _ := xml.Marshal(f.CalcChain) f.saveFileList(defaultXMLPathCalcChain, output) } } // deleteCalcChain provides a function to remove cell reference on the // calculation chain. func (f *File) deleteCalcChain(index int, cell string) error { calc, err := f.calcChainReader() if err != nil { return err } if calc != nil { calc.C = xlsxCalcChainCollection(calc.C).Filter(func(c xlsxCalcChainC) bool { return !((c.I == index && c.R == cell) || (c.I == index && cell == "") || (c.I == 0 && c.R == cell)) }) } if len(calc.C) == 0 { f.CalcChain = nil f.Pkg.Delete(defaultXMLPathCalcChain) content, err := f.contentTypesReader() if err != nil { return err } content.Lock() defer content.Unlock() for k, v := range content.Overrides { if v.PartName == "/xl/calcChain.xml" { content.Overrides = append(content.Overrides[:k], content.Overrides[k+1:]...) } } } return err } type xlsxCalcChainCollection []xlsxCalcChainC // Filter provides a function to filter calculation chain. func (c xlsxCalcChainCollection) Filter(fn func(v xlsxCalcChainC) bool) []xlsxCalcChainC { var results []xlsxCalcChainC for _, v := range c { if fn(v) { results = append(results, v) } } return results }