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ddafaca850
* Issue #376 fix - RemoveColumn * Removing of columns is forbidden when there are formula arrays in the area of removing, except 1-column wide arrays * Modifying named ranges, column ranges when deleting a column * Updating formulas when deleting a column * UpdateAction
109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
// Copyright 2017 FoxyUtils ehf. All rights reserved.
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//
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// Use of this source code is governed by the terms of the Affero GNU General
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// Public License version 3.0 as published by the Free Software Foundation and
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// appearing in the file LICENSE included in the packaging of this file. A
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// commercial license can be purchased on https://unidoc.io.
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package reference
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"github.com/unidoc/unioffice/spreadsheet/update"
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)
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// CellReference is a parsed reference to a cell. Input is of the form 'A1',
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// '$C$2', etc.
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type CellReference struct {
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RowIdx uint32
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ColumnIdx uint32
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Column string
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AbsoluteColumn bool
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AbsoluteRow bool
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SheetName string
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}
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// String returns a string representation of CellReference.
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func (c CellReference) String() string {
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buf := make([]byte, 0, 4)
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if c.AbsoluteColumn {
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buf = append(buf, '$')
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}
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buf = append(buf, c.Column...)
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if c.AbsoluteRow {
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buf = append(buf, '$')
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}
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buf = strconv.AppendInt(buf, int64(c.RowIdx), 10)
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return string(buf)
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}
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// ParseCellReference parses a cell reference of the form 'A10' and splits it
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// into column/row segments.
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func ParseCellReference(s string) (CellReference, error) {
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s = strings.TrimSpace(s)
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if len(s) < 2 {
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return CellReference{}, errors.New("cell reference must have at least two characters")
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}
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r := CellReference{}
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sl := strings.Split(s, "!")
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if len(sl) == 2 {
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r.SheetName = sl[0]
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s = sl[1]
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}
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// check for absolute column
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if s[0] == '$' {
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r.AbsoluteColumn = true
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s = s[1:]
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}
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split := -1
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lfor:
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for i := 0; i < len(s); i++ {
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switch {
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case s[i] >= '0' && s[i] <= '9' || s[i] == '$':
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split = i
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break lfor
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}
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}
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switch split {
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case 0:
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return CellReference{}, fmt.Errorf("no letter prefix in %s", s)
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case -1:
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return CellReference{}, fmt.Errorf("no digits in %s", s)
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}
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r.Column = s[0:split]
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if s[split] == '$' {
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r.AbsoluteRow = true
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split++
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}
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r.ColumnIdx = ColumnToIndex(r.Column)
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r64, err := strconv.ParseUint(s[split:], 10, 32)
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if err != nil {
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return CellReference{}, fmt.Errorf("error parsing row: %s", err)
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}
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r.RowIdx = uint32(r64)
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return r, nil
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}
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// Update updates reference to point one of the neighboring cells with respect to the update type after removing a row/column.
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func (ref *CellReference) Update(updateType update.UpdateAction) *CellReference {
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switch updateType {
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case update.UpdateActionRemoveColumn:
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newRef := ref
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newRef.ColumnIdx = ref.ColumnIdx - 1
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newRef.Column = IndexToColumn(newRef.ColumnIdx)
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return newRef
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default:
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return ref
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}
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}
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