mirror of
https://github.com/unidoc/unioffice.git
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a5ef37c0bc
* evaluation errors fixed * allow underscores in sheet names * allow wildcard in *LOOKUP functions * horizontal and vertical ranges * horizontal and vertical ranges for sheet references * remove redundant recalculate * caching * fixed named ranges, made Evaluator more generic * Memory usage shown in flatten example * temporary file deleted * ParseCellReference duplicate removed * ISREF is fixed
44 lines
1.4 KiB
Go
44 lines
1.4 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 formula
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import "fmt"
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// PrefixExpr is an expression containing reference to another sheet like Sheet1!A1 (the value of the cell A1 from sheet 'Sheet1').
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type PrefixExpr struct {
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pfx Expression
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exp Expression
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}
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// NewPrefixExpr constructs an expression with prefix.
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func NewPrefixExpr(pfx, exp Expression) Expression {
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return &PrefixExpr{pfx, exp}
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}
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// Eval evaluates and returns an expression with prefix.
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func (p PrefixExpr) Eval(ctx Context, ev Evaluator) Result {
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ref := p.pfx.Reference(ctx, ev)
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switch ref.Type {
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case ReferenceTypeSheet:
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sheetCtx := ctx.Sheet(ref.Value)
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return p.exp.Eval(sheetCtx, ev)
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default:
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return MakeErrorResult(fmt.Sprintf("no support for reference type %s", ref.Type))
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}
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}
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// Reference returns a string reference value to an expression with prefix.
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func (p PrefixExpr) Reference(ctx Context, ev Evaluator) Reference {
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pfx := p.pfx.Reference(ctx, ev)
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exp := p.exp.Reference(ctx, ev)
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if pfx.Type == ReferenceTypeSheet && exp.Type == ReferenceTypeCell {
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return Reference{Type: ReferenceTypeCell, Value: pfx.Value + "!" + exp.Value}
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}
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return ReferenceInvalid
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}
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