mirror of
https://github.com/golang/go
synced 2024-11-18 23:54:41 -07:00
be5259f298
This relates to https://github.com/golang/go/issues/31374 and should switch all instances within `gopls` to use `x/errors` instead of `fmt` to create new errors. Change-Id: I18339b75d12418d852e0dcc2ba0ed6c2970783b3 GitHub-Last-Rev: f4a55d9b79e7458ef1f1e06cb5eabbabd884f321 GitHub-Pull-Request: golang/tools#108 Reviewed-on: https://go-review.googlesource.com/c/tools/+/179880 Run-TryBot: Rebecca Stambler <rstambler@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
111 lines
2.6 KiB
Go
111 lines
2.6 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// this file contains protocol<->span converters
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package protocol
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import (
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"go/token"
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"golang.org/x/tools/internal/span"
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errors "golang.org/x/xerrors"
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)
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type ColumnMapper struct {
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URI span.URI
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Converter *span.TokenConverter
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Content []byte
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}
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func NewURI(uri span.URI) string {
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return string(uri)
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}
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func NewColumnMapper(uri span.URI, filename string, fset *token.FileSet, f *token.File, content []byte) *ColumnMapper {
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var converter *span.TokenConverter
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if f == nil {
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converter = span.NewContentConverter(filename, content)
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} else {
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converter = span.NewTokenConverter(fset, f)
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}
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return &ColumnMapper{
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URI: uri,
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Converter: converter,
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Content: content,
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}
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}
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func (m *ColumnMapper) Location(s span.Span) (Location, error) {
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rng, err := m.Range(s)
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if err != nil {
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return Location{}, err
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}
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return Location{URI: NewURI(s.URI()), Range: rng}, nil
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}
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func (m *ColumnMapper) Range(s span.Span) (Range, error) {
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if span.CompareURI(m.URI, s.URI()) != 0 {
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return Range{}, errors.Errorf("column mapper is for file %q instead of %q", m.URI, s.URI())
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}
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s, err := s.WithAll(m.Converter)
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if err != nil {
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return Range{}, err
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}
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start, err := m.Position(s.Start())
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if err != nil {
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return Range{}, err
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}
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end, err := m.Position(s.End())
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if err != nil {
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return Range{}, err
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}
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return Range{Start: start, End: end}, nil
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}
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func (m *ColumnMapper) Position(p span.Point) (Position, error) {
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chr, err := span.ToUTF16Column(p, m.Content)
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if err != nil {
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return Position{}, err
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}
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return Position{
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Line: float64(p.Line() - 1),
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Character: float64(chr - 1),
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}, nil
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}
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func (m *ColumnMapper) Span(l Location) (span.Span, error) {
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return m.RangeSpan(l.Range)
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}
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func (m *ColumnMapper) RangeSpan(r Range) (span.Span, error) {
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start, err := m.Point(r.Start)
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if err != nil {
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return span.Span{}, err
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}
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end, err := m.Point(r.End)
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if err != nil {
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return span.Span{}, err
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}
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return span.New(m.URI, start, end).WithAll(m.Converter)
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}
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func (m *ColumnMapper) PointSpan(p Position) (span.Span, error) {
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start, err := m.Point(p)
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if err != nil {
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return span.Span{}, err
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}
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return span.New(m.URI, start, start).WithAll(m.Converter)
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}
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func (m *ColumnMapper) Point(p Position) (span.Point, error) {
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line := int(p.Line) + 1
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offset, err := m.Converter.ToOffset(line, 1)
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if err != nil {
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return span.Point{}, err
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}
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lineStart := span.NewPoint(line, 1, offset)
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return span.FromUTF16Column(lineStart, int(p.Character)+1, m.Content)
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}
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