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
95 lines
2.4 KiB
Go
95 lines
2.4 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 "time"
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// InvalidReferenceContext is a Context that can be used when evaluating an
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// invalid reference (e.g. referencing a non-existent sheet). It implements
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// Context safely, but returns error results.
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var InvalidReferenceContext = &ivr{}
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type ivr struct {
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}
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func (i *ivr) Cell(ref string, ev Evaluator) Result {
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return MakeErrorResult("invalid reference")
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}
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func (i *ivr) NamedRange(ref string) Reference {
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return ReferenceInvalid
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}
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func (i *ivr) Sheet(name string) Context {
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return i
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}
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func (i *ivr) SetOffset(col, row uint32) {
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}
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// GetFormat returns an empty string for the invalid reference context.
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func (i *ivr) GetFormat(cellRef string) string {
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return ""
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}
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// GetLabelPrefix returns an empty string for the invalid reference context.
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func (i *ivr) GetLabelPrefix(cellRef string) string {
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return ""
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}
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// GetLocked returns FALSE for the invalid reference context.
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func (i *ivr) GetLocked(cellRef string) bool {
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return false
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}
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// HasFormula returns FALSE for the invalid reference context.
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func (i *ivr) HasFormula(cellRef string) bool {
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return false
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}
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// SetLocked does nothing for the invalid reference context.
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func (i *ivr) SetLocked(cellRef string, locked bool) {
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}
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// GetWidth returns 0 for the invalid reference context.
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func (i *ivr) GetWidth(colIdx int) float64 {
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return float64(0)
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}
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// GetFilename returns an empty string for the invalid reference context.
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func (i *ivr) GetFilename() string {
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return ""
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}
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// GetEpoch returns a null time object for the invalid reference context.
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func (i *ivr) GetEpoch() time.Time {
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return time.Time{}
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}
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// IsBool returns false for the invalid reference context.
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func (i *ivr) IsBool(cellRef string) bool {
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return false
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}
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// IsDBCS returns false for the invalid reference context.
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func (i *ivr) IsDBCS() bool {
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return false
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}
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// LastColumn returns empty string for the invalid reference context.
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func (i *ivr) LastColumn(rowFrom, rowTo int) string {
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return ""
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}
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// LastRow returns 0 for the invalid reference context.
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func (i *ivr) LastRow(colFrom string) int {
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return 0
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}
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