mirror of
https://github.com/golang/go
synced 2024-11-19 02:24:41 -07:00
85edb9ef32
this moves the actual diff algorithm into a different package and then provides hooks so it can be easily replaced with an alternate algorithm. Change-Id: Ia0359f58878493599ea0e0fda8920f21100e16f1 Reviewed-on: https://go-review.googlesource.com/c/tools/+/190898 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
90 lines
2.2 KiB
Go
90 lines
2.2 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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package lsp
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import (
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"context"
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"golang.org/x/tools/internal/lsp/diff"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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"golang.org/x/tools/internal/span"
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)
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func (s *Server) formatting(ctx context.Context, params *protocol.DocumentFormattingParams) ([]protocol.TextEdit, error) {
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uri := span.NewURI(params.TextDocument.URI)
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view := s.session.ViewOf(uri)
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spn := span.New(uri, span.Point{}, span.Point{})
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f, m, rng, err := spanToRange(ctx, view, spn)
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if err != nil {
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return nil, err
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}
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edits, err := source.Format(ctx, f, rng)
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if err != nil {
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return nil, err
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}
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return ToProtocolEdits(m, edits)
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}
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func spanToRange(ctx context.Context, view source.View, spn span.Span) (source.GoFile, *protocol.ColumnMapper, span.Range, error) {
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f, err := getGoFile(ctx, view, spn.URI())
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if err != nil {
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return nil, nil, span.Range{}, err
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}
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m, err := getMapper(ctx, f)
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if err != nil {
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return nil, nil, span.Range{}, err
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}
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rng, err := spn.Range(m.Converter)
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if err != nil {
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return nil, nil, span.Range{}, err
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}
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if rng.Start == rng.End {
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// If we have a single point, assume we want the whole file.
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tok, err := f.GetToken(ctx)
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if err != nil {
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return nil, nil, span.Range{}, err
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}
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rng.End = tok.Pos(tok.Size())
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}
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return f, m, rng, nil
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}
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func ToProtocolEdits(m *protocol.ColumnMapper, edits []diff.TextEdit) ([]protocol.TextEdit, error) {
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if edits == nil {
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return nil, nil
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}
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result := make([]protocol.TextEdit, len(edits))
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for i, edit := range edits {
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rng, err := m.Range(edit.Span)
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if err != nil {
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return nil, err
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}
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result[i] = protocol.TextEdit{
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Range: rng,
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NewText: edit.NewText,
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}
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}
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return result, nil
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}
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func FromProtocolEdits(m *protocol.ColumnMapper, edits []protocol.TextEdit) ([]diff.TextEdit, error) {
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if edits == nil {
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return nil, nil
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}
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result := make([]diff.TextEdit, len(edits))
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for i, edit := range edits {
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spn, err := m.RangeSpan(edit.Range)
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if err != nil {
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return nil, err
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}
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result[i] = diff.TextEdit{
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Span: spn,
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NewText: edit.NewText,
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}
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}
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return result, nil
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}
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