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col.go
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col.go
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// Copyright 2016 - 2024 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 Excel™ 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 1.18 or later.
package excelize
import (
"bytes"
"encoding/xml"
"math"
"strconv"
"strings"
"github.com/mohae/deepcopy"
)
// Define the default cell size and EMU unit of measurement.
const (
defaultColWidth float64 = 9.140625
defaultColWidthPixels float64 = 64
defaultRowHeight float64 = 15
defaultRowHeightPixels float64 = 20
EMU int = 9525
)
// Cols defines an iterator to a sheet
type Cols struct {
err error
curCol, totalCols, totalRows, stashCol int
rawCellValue bool
sheet string
f *File
sheetXML []byte
sst *xlsxSST
}
// GetCols gets the value of all cells by columns on the worksheet based on the
// given worksheet name, returned as a two-dimensional array, where the value
// of the cell is converted to the `string` type. If the cell format can be
// applied to the value of the cell, the applied value will be used, otherwise
// the original value will be used.
//
// For example, get and traverse the value of all cells by columns on a
// worksheet named
// 'Sheet1':
//
// cols, err := f.GetCols("Sheet1")
// if err != nil {
// fmt.Println(err)
// return
// }
// for _, col := range cols {
// for _, rowCell := range col {
// fmt.Print(rowCell, "\t")
// }
// fmt.Println()
// }
func (f *File) GetCols(sheet string, opts ...Options) ([][]string, error) {
cols, err := f.Cols(sheet)
if err != nil {
return nil, err
}
results := make([][]string, 0, 64)
for cols.Next() {
col, _ := cols.Rows(opts...)
results = append(results, col)
}
return results, nil
}
// Next will return true if the next column is found.
func (cols *Cols) Next() bool {
cols.curCol++
return cols.curCol <= cols.totalCols
}
// Error will return an error when the error occurs.
func (cols *Cols) Error() error {
return cols.err
}
// Rows return the current column's row values.
func (cols *Cols) Rows(opts ...Options) ([]string, error) {
var rowIterator rowXMLIterator
if cols.stashCol >= cols.curCol {
return rowIterator.cells, rowIterator.err
}
cols.rawCellValue = cols.f.getOptions(opts...).RawCellValue
if cols.sst, rowIterator.err = cols.f.sharedStringsReader(); rowIterator.err != nil {
return rowIterator.cells, rowIterator.err
}
decoder := cols.f.xmlNewDecoder(bytes.NewReader(cols.sheetXML))
for {
token, _ := decoder.Token()
if token == nil {
break
}
switch xmlElement := token.(type) {
case xml.StartElement:
rowIterator.inElement = xmlElement.Name.Local
if rowIterator.inElement == "row" {
rowIterator.cellCol = 0
rowIterator.cellRow++
attrR, _ := attrValToInt("r", xmlElement.Attr)
if attrR != 0 {
rowIterator.cellRow = attrR
}
}
if cols.rowXMLHandler(&rowIterator, &xmlElement, decoder); rowIterator.err != nil {
return rowIterator.cells, rowIterator.err
}
case xml.EndElement:
if xmlElement.Name.Local == "sheetData" {
return rowIterator.cells, rowIterator.err
}
}
}
return rowIterator.cells, rowIterator.err
}
// columnXMLIterator defined runtime use field for the worksheet column SAX parser.
type columnXMLIterator struct {
err error
cols Cols
cellCol, curRow, row int
}
// columnXMLHandler parse the column XML element of the worksheet.
func columnXMLHandler(colIterator *columnXMLIterator, xmlElement *xml.StartElement) {
colIterator.err = nil
inElement := xmlElement.Name.Local
if inElement == "row" {
colIterator.row++
for _, attr := range xmlElement.Attr {
if attr.Name.Local == "r" {
if colIterator.curRow, colIterator.err = strconv.Atoi(attr.Value); colIterator.err != nil {
return
}
colIterator.row = colIterator.curRow
}
}
colIterator.cols.totalRows = colIterator.row
colIterator.cellCol = 0
}
if inElement == "c" {
colIterator.cellCol++
for _, attr := range xmlElement.Attr {
if attr.Name.Local == "r" {
if colIterator.cellCol, _, colIterator.err = CellNameToCoordinates(attr.Value); colIterator.err != nil {
return
}
}
}
if colIterator.cellCol > colIterator.cols.totalCols {
colIterator.cols.totalCols = colIterator.cellCol
}
}
}
// rowXMLHandler parse the row XML element of the worksheet.
func (cols *Cols) rowXMLHandler(rowIterator *rowXMLIterator, xmlElement *xml.StartElement, decoder *xml.Decoder) {
if rowIterator.inElement == "c" {
rowIterator.cellCol++
for _, attr := range xmlElement.Attr {
if attr.Name.Local == "r" {
if rowIterator.cellCol, rowIterator.cellRow, rowIterator.err = CellNameToCoordinates(attr.Value); rowIterator.err != nil {
return
}
}
}
blank := rowIterator.cellRow - len(rowIterator.cells)
for i := 1; i < blank; i++ {
rowIterator.cells = append(rowIterator.cells, "")
}
if rowIterator.cellCol == cols.curCol {
colCell := xlsxC{}
_ = decoder.DecodeElement(&colCell, xmlElement)
val, _ := colCell.getValueFrom(cols.f, cols.sst, cols.rawCellValue)
rowIterator.cells = append(rowIterator.cells, val)
}
}
}
// Cols returns a columns iterator, used for streaming reading data for a
// worksheet with a large data. This function is concurrency safe. For
// example:
//
// cols, err := f.Cols("Sheet1")
// if err != nil {
// fmt.Println(err)
// return
// }
// for cols.Next() {
// col, err := cols.Rows()
// if err != nil {
// fmt.Println(err)
// }
// for _, rowCell := range col {
// fmt.Print(rowCell, "\t")
// }
// fmt.Println()
// }
func (f *File) Cols(sheet string) (*Cols, error) {
if err := checkSheetName(sheet); err != nil {
return nil, err
}
name, ok := f.getSheetXMLPath(sheet)
if !ok {
return nil, ErrSheetNotExist{sheet}
}
if worksheet, ok := f.Sheet.Load(name); ok && worksheet != nil {
ws := worksheet.(*xlsxWorksheet)
ws.mu.Lock()
defer ws.mu.Unlock()
output, _ := xml.Marshal(ws)
f.saveFileList(name, f.replaceNameSpaceBytes(name, output))
}
var colIterator columnXMLIterator
colIterator.cols.sheetXML = f.readBytes(name)
decoder := f.xmlNewDecoder(bytes.NewReader(colIterator.cols.sheetXML))
for {
token, _ := decoder.Token()
if token == nil {
break
}
switch xmlElement := token.(type) {
case xml.StartElement:
columnXMLHandler(&colIterator, &xmlElement)
if colIterator.err != nil {
return &colIterator.cols, colIterator.err
}
case xml.EndElement:
if xmlElement.Name.Local == "sheetData" {
colIterator.cols.f = f
colIterator.cols.sheet = sheet
return &colIterator.cols, nil
}
}
}
return &colIterator.cols, nil
}
// GetColVisible provides a function to get visible of a single column by given
// worksheet name and column name. This function is concurrency safe. For
// example, get visible state of column D in Sheet1:
//
// visible, err := f.GetColVisible("Sheet1", "D")
func (f *File) GetColVisible(sheet, col string) (bool, error) {
colNum, err := ColumnNameToNumber(col)
if err != nil {
return true, err
}
f.mu.Lock()
ws, err := f.workSheetReader(sheet)
if err != nil {
f.mu.Unlock()
return false, err
}
f.mu.Unlock()
ws.mu.Lock()
defer ws.mu.Unlock()
if ws.Cols == nil {
return true, err
}
visible := true
for c := range ws.Cols.Col {
colData := &ws.Cols.Col[c]
if colData.Min <= colNum && colNum <= colData.Max {
visible = !colData.Hidden
}
}
return visible, err
}
// SetColVisible provides a function to set visible columns by given worksheet
// name, columns range and visibility. This function is concurrency safe.
//
// For example hide column D on Sheet1:
//
// err := f.SetColVisible("Sheet1", "D", false)
//
// Hide the columns from D to F (included):
//
// err := f.SetColVisible("Sheet1", "D:F", false)
func (f *File) SetColVisible(sheet, columns string, visible bool) error {
minVal, maxVal, err := f.parseColRange(columns)
if err != nil {
return err
}
ws, err := f.workSheetReader(sheet)
if err != nil {
return err
}
ws.mu.Lock()
defer ws.mu.Unlock()
colData := xlsxCol{
Min: minVal,
Max: maxVal,
Width: float64Ptr(defaultColWidth),
Hidden: !visible,
CustomWidth: true,
}
if ws.Cols == nil {
cols := xlsxCols{}
cols.Col = append(cols.Col, colData)
ws.Cols = &cols
return nil
}
ws.Cols.Col = flatCols(colData, ws.Cols.Col, func(fc, c xlsxCol) xlsxCol {
fc.BestFit = c.BestFit
fc.Collapsed = c.Collapsed
fc.CustomWidth = c.CustomWidth
fc.OutlineLevel = c.OutlineLevel
fc.Phonetic = c.Phonetic
fc.Style = c.Style
fc.Width = c.Width
return fc
})
return nil
}
// GetColOutlineLevel provides a function to get outline level of a single
// column by given worksheet name and column name. For example, get outline
// level of column D in Sheet1:
//
// level, err := f.GetColOutlineLevel("Sheet1", "D")
func (f *File) GetColOutlineLevel(sheet, col string) (uint8, error) {
level := uint8(0)
colNum, err := ColumnNameToNumber(col)
if err != nil {
return level, err
}
ws, err := f.workSheetReader(sheet)
if err != nil {
return 0, err
}
if ws.Cols == nil {
return level, err
}
for c := range ws.Cols.Col {
colData := &ws.Cols.Col[c]
if colData.Min <= colNum && colNum <= colData.Max {
level = colData.OutlineLevel
}
}
return level, err
}
// parseColRange parse and convert column range with column name to the column number.
func (f *File) parseColRange(columns string) (minVal, maxVal int, err error) {
colsTab := strings.Split(columns, ":")
minVal, err = ColumnNameToNumber(colsTab[0])
if err != nil {
return
}
maxVal = minVal
if len(colsTab) == 2 {
if maxVal, err = ColumnNameToNumber(colsTab[1]); err != nil {
return
}
}
if maxVal < minVal {
minVal, maxVal = maxVal, minVal
}
return
}
// SetColOutlineLevel provides a function to set outline level of a single
// column by given worksheet name and column name. The value of parameter
// 'level' is 1-7. For example, set outline level of column D in Sheet1 to 2:
//
// err := f.SetColOutlineLevel("Sheet1", "D", 2)
func (f *File) SetColOutlineLevel(sheet, col string, level uint8) error {
if level > 7 || level < 1 {
return ErrOutlineLevel
}
colNum, err := ColumnNameToNumber(col)
if err != nil {
return err
}
colData := xlsxCol{
Min: colNum,
Max: colNum,
OutlineLevel: level,
CustomWidth: true,
}
ws, err := f.workSheetReader(sheet)
if err != nil {
return err
}
if ws.Cols == nil {
cols := xlsxCols{}
cols.Col = append(cols.Col, colData)
ws.Cols = &cols
return err
}
ws.Cols.Col = flatCols(colData, ws.Cols.Col, func(fc, c xlsxCol) xlsxCol {
fc.BestFit = c.BestFit
fc.Collapsed = c.Collapsed
fc.CustomWidth = c.CustomWidth
fc.Hidden = c.Hidden
fc.Phonetic = c.Phonetic
fc.Style = c.Style
fc.Width = c.Width
return fc
})
return err
}
// SetColStyle provides a function to set style of columns by given worksheet
// name, columns range and style ID. This function is concurrency safe. Note
// that this will overwrite the existing styles for the columns, it won't
// append or merge style with existing styles.
//
// For example set style of column H on Sheet1:
//
// err = f.SetColStyle("Sheet1", "H", style)
//
// Set style of columns C:F on Sheet1:
//
// err = f.SetColStyle("Sheet1", "C:F", style)
func (f *File) SetColStyle(sheet, columns string, styleID int) error {
minVal, maxVal, err := f.parseColRange(columns)
if err != nil {
return err
}
f.mu.Lock()
s, err := f.stylesReader()
if err != nil {
f.mu.Unlock()
return err
}
ws, err := f.workSheetReader(sheet)
if err != nil {
f.mu.Unlock()
return err
}
f.mu.Unlock()
s.mu.Lock()
if styleID < 0 || s.CellXfs == nil || len(s.CellXfs.Xf) <= styleID {
s.mu.Unlock()
return newInvalidStyleID(styleID)
}
s.mu.Unlock()
ws.mu.Lock()
if ws.Cols == nil {
ws.Cols = &xlsxCols{}
}
width := defaultColWidth
if ws.SheetFormatPr != nil && ws.SheetFormatPr.DefaultColWidth > 0 {
width = ws.SheetFormatPr.DefaultColWidth
}
ws.Cols.Col = flatCols(xlsxCol{
Min: minVal,
Max: maxVal,
Width: float64Ptr(width),
Style: styleID,
}, ws.Cols.Col, func(fc, c xlsxCol) xlsxCol {
fc.BestFit = c.BestFit
fc.Collapsed = c.Collapsed
fc.CustomWidth = c.CustomWidth
fc.Hidden = c.Hidden
fc.OutlineLevel = c.OutlineLevel
fc.Phonetic = c.Phonetic
fc.Width = c.Width
return fc
})
ws.mu.Unlock()
if rows := len(ws.SheetData.Row); rows > 0 {
for col := minVal; col <= maxVal; col++ {
from, _ := CoordinatesToCellName(col, 1)
to, _ := CoordinatesToCellName(col, rows)
err = f.SetCellStyle(sheet, from, to, styleID)
}
}
return err
}
// SetColWidth provides a function to set the width of a single column or
// multiple columns. This function is concurrency safe. For example:
//
// err := f.SetColWidth("Sheet1", "A", "H", 20)
func (f *File) SetColWidth(sheet, startCol, endCol string, width float64) error {
minVal, maxVal, err := f.parseColRange(startCol + ":" + endCol)
if err != nil {
return err
}
if width > MaxColumnWidth {
return ErrColumnWidth
}
f.mu.Lock()
ws, err := f.workSheetReader(sheet)
if err != nil {
f.mu.Unlock()
return err
}
f.mu.Unlock()
ws.mu.Lock()
defer ws.mu.Unlock()
col := xlsxCol{
Min: minVal,
Max: maxVal,
Width: float64Ptr(width),
CustomWidth: true,
}
if ws.Cols == nil {
cols := xlsxCols{}
cols.Col = append(cols.Col, col)
ws.Cols = &cols
return err
}
ws.Cols.Col = flatCols(col, ws.Cols.Col, func(fc, c xlsxCol) xlsxCol {
fc.BestFit = c.BestFit
fc.Collapsed = c.Collapsed
fc.Hidden = c.Hidden
fc.OutlineLevel = c.OutlineLevel
fc.Phonetic = c.Phonetic
fc.Style = c.Style
return fc
})
return err
}
// flatCols provides a method for the column's operation functions to flatten
// and check the worksheet columns.
func flatCols(col xlsxCol, cols []xlsxCol, replacer func(fc, c xlsxCol) xlsxCol) []xlsxCol {
var fc []xlsxCol
for i := col.Min; i <= col.Max; i++ {
c := deepcopy.Copy(col).(xlsxCol)
c.Min, c.Max = i, i
fc = append(fc, c)
}
inFlat := func(colID int, cols []xlsxCol) (int, bool) {
for idx, c := range cols {
if c.Max == colID && c.Min == colID {
return idx, true
}
}
return -1, false
}
for _, column := range cols {
for i := column.Min; i <= column.Max; i++ {
if idx, ok := inFlat(i, fc); ok {
fc[idx] = replacer(fc[idx], column)
continue
}
c := deepcopy.Copy(column).(xlsxCol)
c.Min, c.Max = i, i
fc = append(fc, c)
}
}
return fc
}
// positionObjectPixels calculate the vertices that define the position of a
// graphical object within the worksheet in pixels.
//
// +------------+------------+
// | A | B |
// +-----+------------+------------+
// | |(x1,y1) | |
// | 1 |(A1)._______|______ |
// | | | | |
// | | | | |
// +-----+----| OBJECT |-----+
// | | | | |
// | 2 | |______________. |
// | | | (B2)|
// | | | (x2,y2)|
// +-----+------------+------------+
//
// Example of an object that covers some range reference from cell A1 to B2.
//
// Based on the width and height of the object we need to calculate 8 vars:
//
// colStart, rowStart, colEnd, rowEnd, x1, y1, x2, y2.
//
// We also calculate the absolute x and y position of the top left vertex of
// the object. This is required for images.
//
// The width and height of the cells that the object occupies can be
// variable and have to be taken into account.
//
// The values of col_start and row_start are passed in from the calling
// function. The values of col_end and row_end are calculated by
// subtracting the width and height of the object from the width and
// height of the underlying cells.
//
// colStart # Col containing upper left corner of object.
// x1 # Distance to left side of object.
//
// rowStart # Row containing top left corner of object.
// y1 # Distance to top of object.
//
// colEnd # Col containing lower right corner of object.
// x2 # Distance to right side of object.
//
// rowEnd # Row containing bottom right corner of object.
// y2 # Distance to bottom of object.
//
// width # Width of object frame.
// height # Height of object frame.
func (f *File) positionObjectPixels(sheet string, col, row, x1, y1, width, height int) (int, int, int, int, int, int) {
colIdx, rowIdx := col-1, row-1
// Adjust start column for offsets that are greater than the col width.
for x1 >= f.getColWidth(sheet, colIdx+1) {
colIdx++
x1 -= f.getColWidth(sheet, colIdx)
}
// Adjust start row for offsets that are greater than the row height.
for y1 >= f.getRowHeight(sheet, rowIdx+1) {
rowIdx++
y1 -= f.getRowHeight(sheet, rowIdx)
}
// Initialized end cell to the same as the start cell.
colEnd, rowEnd := colIdx, rowIdx
width += x1
height += y1
// Subtract the underlying cell widths to find end cell of the object.
for width >= f.getColWidth(sheet, colEnd+1) {
colEnd++
width -= f.getColWidth(sheet, colEnd)
}
// Subtract the underlying cell heights to find end cell of the object.
for height >= f.getRowHeight(sheet, rowEnd+1) {
rowEnd++
height -= f.getRowHeight(sheet, rowEnd)
}
// The end vertices are whatever is left from the width and height.
return colIdx, rowIdx, colEnd, rowEnd, width, height
}
// getColWidth provides a function to get column width in pixels by given
// sheet name and column number.
func (f *File) getColWidth(sheet string, col int) int {
ws, _ := f.workSheetReader(sheet)
ws.mu.Lock()
defer ws.mu.Unlock()
if ws.Cols != nil {
var width float64
for _, v := range ws.Cols.Col {
if v.Min <= col && col <= v.Max && v.Width != nil {
width = *v.Width
}
}
if width != 0 {
return int(convertColWidthToPixels(width))
}
}
if ws.SheetFormatPr != nil && ws.SheetFormatPr.DefaultColWidth > 0 {
return int(convertColWidthToPixels(ws.SheetFormatPr.DefaultColWidth))
}
// Optimization for when the column widths haven't changed.
return int(defaultColWidthPixels)
}
// GetColStyle provides a function to get column style ID by given worksheet
// name and column name. This function is concurrency safe.
func (f *File) GetColStyle(sheet, col string) (int, error) {
var styleID int
colNum, err := ColumnNameToNumber(col)
if err != nil {
return styleID, err
}
f.mu.Lock()
ws, err := f.workSheetReader(sheet)
if err != nil {
f.mu.Unlock()
return styleID, err
}
f.mu.Unlock()
ws.mu.Lock()
defer ws.mu.Unlock()
if ws.Cols != nil {
for _, v := range ws.Cols.Col {
if v.Min <= colNum && colNum <= v.Max {
styleID = v.Style
}
}
}
return styleID, err
}
// GetColWidth provides a function to get column width by given worksheet name
// and column name. This function is concurrency safe.
func (f *File) GetColWidth(sheet, col string) (float64, error) {
colNum, err := ColumnNameToNumber(col)
if err != nil {
return defaultColWidth, err
}
f.mu.Lock()
ws, err := f.workSheetReader(sheet)
if err != nil {
f.mu.Unlock()
return defaultColWidth, err
}
f.mu.Unlock()
ws.mu.Lock()
defer ws.mu.Unlock()
if ws.Cols != nil {
var width float64
for _, v := range ws.Cols.Col {
if v.Min <= colNum && colNum <= v.Max && v.Width != nil {
width = *v.Width
}
}
if width != 0 {
return width, err
}
}
if ws.SheetFormatPr != nil && ws.SheetFormatPr.DefaultColWidth > 0 {
return ws.SheetFormatPr.DefaultColWidth, err
}
// Optimization for when the column widths haven't changed.
return defaultColWidth, err
}
// InsertCols provides a function to insert new columns before the given column
// name and number of columns. For example, create two columns before column
// C in Sheet1:
//
// err := f.InsertCols("Sheet1", "C", 2)
//
// Use this method with caution, which will affect changes in references such
// as formulas, charts, and so on. If there is any referenced value of the
// worksheet, it will cause a file error when you open it. The excelize only
// partially updates these references currently.
func (f *File) InsertCols(sheet, col string, n int) error {
num, err := ColumnNameToNumber(col)
if err != nil {
return err
}
if n < 1 || n > MaxColumns {
return ErrColumnNumber
}
return f.adjustHelper(sheet, columns, num, n)
}
// RemoveCol provides a function to remove single column by given worksheet
// name and column index. For example, remove column C in Sheet1:
//
// err := f.RemoveCol("Sheet1", "C")
//
// Use this method with caution, which will affect changes in references such
// as formulas, charts, and so on. If there is any referenced value of the
// worksheet, it will cause a file error when you open it. The excelize only
// partially updates these references currently.
func (f *File) RemoveCol(sheet, col string) error {
num, err := ColumnNameToNumber(col)
if err != nil {
return err
}
ws, err := f.workSheetReader(sheet)
if err != nil {
return err
}
for rowIdx := range ws.SheetData.Row {
rowData := &ws.SheetData.Row[rowIdx]
for colIdx := range rowData.C {
colName, _, _ := SplitCellName(rowData.C[colIdx].R)
if colName == col {
rowData.C = append(rowData.C[:colIdx], rowData.C[colIdx+1:]...)[:len(rowData.C)-1]
break
}
}
}
return f.adjustHelper(sheet, columns, num, -1)
}
// convertColWidthToPixels provides function to convert the width of a cell
// from user's units to pixels. Excel rounds the column width to the nearest
// pixel. If the width hasn't been set by the user we use the default value.
// If the column is hidden it has a value of zero.
func convertColWidthToPixels(width float64) float64 {
var padding float64 = 5
var pixels float64
var maxDigitWidth float64 = 7
if width == 0 {
return pixels
}
if width < 1 {
pixels = (width * 12) + 0.5
return math.Ceil(pixels)
}
pixels = (width*maxDigitWidth + 0.5) + padding
return math.Ceil(pixels)
}