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
61 lines
2.0 KiB
Go
61 lines
2.0 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 (
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"fmt"
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"strconv"
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"strings"
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)
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// PrefixHorizontalRange is a range expression that when evaluated returns a list of Results from references like Sheet1!1:4 (all cells from rows 1 to 4 of sheet 'Sheet1').
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type PrefixHorizontalRange struct {
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pfx Expression
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rowFrom, rowTo int
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}
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// NewPrefixHorizontalRange constructs a new full rows range with prefix.
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func NewPrefixHorizontalRange(pfx Expression, v string) Expression {
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sl := strings.Split(v, ":")
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if len(sl) != 2 {
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return nil
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}
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from, _ := strconv.Atoi(sl[0])
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to, _ := strconv.Atoi(sl[1])
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return PrefixHorizontalRange{pfx, from, to}
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}
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// Eval evaluates a horizontal range with prefix returning a list of results or an error.
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func (r PrefixHorizontalRange) Eval(ctx Context, ev Evaluator) Result {
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pfx := r.pfx.Reference(ctx, ev)
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switch pfx.Type {
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case ReferenceTypeSheet:
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ref := r.horizontalRangeReference(pfx.Value)
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if cached, found := ev.GetFromCache(ref); found {
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return cached
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}
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c := ctx.Sheet(pfx.Value)
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from, to := cellRefsFromHorizontalRange(c, r.rowFrom, r.rowTo)
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result := resultFromCellRange(c, ev, from, to)
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ev.SetCache(ref, result)
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return result
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default:
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return MakeErrorResult(fmt.Sprintf("no support for reference type %s", pfx.Type))
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}
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}
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func (r PrefixHorizontalRange) horizontalRangeReference(sheetName string) string {
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return fmt.Sprintf("%s!%d:%d", sheetName, r.rowFrom, r.rowTo)
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}
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// Reference returns a string reference value to a horizontal range with prefix.
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func (r PrefixHorizontalRange) Reference(ctx Context, ev Evaluator) Reference {
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pfx := r.pfx.Reference(ctx, ev)
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return Reference{Type: ReferenceTypeHorizontalRange, Value: r.horizontalRangeReference(pfx.Value)}
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}
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