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d69cf90249
This adds support for extracting a cell's formatted value according to the number format applied to the cell. To do this we need to implement a parser for Excel style format strings and support formatting numbers according to that style. This also enhances the General formatting to be much closer to what Excel normally does. There are likely still a few corner cases where Excel and gooxml differ, but hopefully not too many.
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright 2017 Baliance. 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 by contacting sales@baliance.com.
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package spreadsheet
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import (
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"baliance.com/gooxml/spreadsheet/formula"
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)
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func newEvalContext(s *Sheet) *evalContext {
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return &evalContext{s, make(map[string]struct{})}
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}
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type evalContext struct {
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s *Sheet
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evaluating map[string]struct{}
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}
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func (e *evalContext) Cell(ref string, ev formula.Evaluator) formula.Result {
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c := e.s.Cell(ref)
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// if we have a formula, evaluate it
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if c.HasFormula() {
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if _, ok := e.evaluating[ref]; ok {
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// recursively evaluating, so bail out
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return formula.MakeErrorResult("recursion detected during evaluation of " + ref)
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}
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e.evaluating[ref] = struct{}{}
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res := ev.Eval(e, c.GetFormula())
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delete(e.evaluating, ref)
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return res
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}
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// Evaluating an empty cell returns a zero in Excel
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if c.IsEmpty() {
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return formula.MakeNumberResult(0)
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} else if c.IsNumber() {
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v, _ := c.GetValueAsNumber()
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return formula.MakeNumberResult(v)
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} else if c.IsBool() {
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v, _ := c.GetValueAsBool()
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return formula.MakeBoolResult(v)
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}
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v, _ := c.GetRawValue()
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return formula.MakeStringResult(v)
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// TODO: handle this properly
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// return formula.MakeErrorResult()
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}
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func (e *evalContext) Sheet(name string) formula.Context {
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for _, sheet := range e.s.w.Sheets() {
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if sheet.Name() == name {
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return sheet.FormulaContext()
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}
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}
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return formula.InvalidReferenceContext
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}
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func (e *evalContext) NamedRange(ref string) formula.Reference {
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for _, dn := range e.s.w.DefinedNames() {
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if dn.Name() == ref {
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return formula.MakeRangeReference(dn.Content())
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}
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}
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for _, tbl := range e.s.w.Tables() {
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if tbl.Name() == ref {
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return formula.MakeRangeReference(tbl.Reference())
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}
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}
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return formula.ReferenceInvalid
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}
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