mirror of
https://github.com/golang/go
synced 2024-10-01 10:38:33 -06:00
3576414c54
This change separates a cache package out of the golang.org/x/tools/internal/lsp/source package. The source package now uses an interface instead a File struct, which will allow it be reused more easily. The cache package contains the View and File structs now. Change-Id: Ia2114e9dafc5214c8b21bceba3adae1c36b9799d Reviewed-on: https://go-review.googlesource.com/c/152798 Reviewed-by: Ian Cottrell <iancottrell@google.com>
51 lines
1.2 KiB
Go
51 lines
1.2 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 source
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import (
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"context"
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"fmt"
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"go/token"
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"go/types"
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)
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func Hover(ctx context.Context, f File, pos token.Pos) (string, Range, error) {
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fAST, err := f.GetAST()
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if err != nil {
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return "", Range{}, err
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}
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pkg, err := f.GetPackage()
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if err != nil {
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return "", Range{}, err
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}
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i, err := findIdentifier(fAST, pos)
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if err != nil {
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return "", Range{}, err
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}
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if i.ident == nil {
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return "", Range{}, fmt.Errorf("not a valid identifier")
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}
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obj := pkg.TypesInfo.ObjectOf(i.ident)
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if obj == nil {
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return "", Range{}, fmt.Errorf("no object")
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}
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if i.wasEmbeddedField {
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// the original position was on the embedded field declaration
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// so we try to dig out the type and jump to that instead
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if v, ok := obj.(*types.Var); ok {
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if n, ok := v.Type().(*types.Named); ok {
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obj = n.Obj()
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}
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}
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}
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// TODO(rstambler): Add documentation and improve quality of object string.
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content := types.ObjectString(obj, qualifier(fAST, pkg.Types, pkg.TypesInfo))
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markdown := "```go\n" + content + "\n```"
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return markdown, Range{
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Start: i.ident.Pos(),
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End: i.ident.End(),
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}, nil
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}
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