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https://github.com/golang/go
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a5d4502270
* adds gopls command line tool for call hierarchy * adds lsp setup for call hierarchy * adds handler for textDocument/prepareCallHierarchy to display selected identifier and get incoming/outgoing calls for it * setup testing Change-Id: I0a0904abdbe11273a56162b6e5be93b97ceb9c26 Reviewed-on: https://go-review.googlesource.com/c/tools/+/246521 Run-TryBot: Danish Dua <danishdua@google.com> Reviewed-by: Heschi Kreinick <heschi@google.com>
69 lines
2.3 KiB
Go
69 lines
2.3 KiB
Go
// Copyright 2020 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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"go/ast"
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"golang.org/x/tools/internal/event"
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"golang.org/x/tools/internal/lsp/debug/tag"
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"golang.org/x/tools/internal/lsp/protocol"
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errors "golang.org/x/xerrors"
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)
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// PrepareCallHierarchy returns an array of CallHierarchyItem for a file and the position within the file
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func PrepareCallHierarchy(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyItem, error) {
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ctx, done := event.Start(ctx, "source.prepareCallHierarchy")
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defer done()
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identifier, err := Identifier(ctx, snapshot, fh, pos)
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if err != nil {
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if errors.Is(err, ErrNoIdentFound) {
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event.Log(ctx, err.Error(), tag.Position.Of(pos))
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} else {
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event.Error(ctx, "error getting identifier", err, tag.Position.Of(pos))
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}
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return nil, nil
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}
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// if identifier is not of type function
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_, ok := identifier.Declaration.node.(*ast.FuncDecl)
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if !ok {
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event.Log(ctx, "invalid identifier type, expected funtion declaration", tag.Position.Of(pos))
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return nil, nil
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}
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rng, err := identifier.Range()
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if err != nil {
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return nil, err
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}
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callHierarchyItem := protocol.CallHierarchyItem{
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Name: identifier.Name,
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Kind: protocol.Function,
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Tags: []protocol.SymbolTag{},
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Detail: "func()",
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URI: protocol.DocumentURI(fh.URI()),
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Range: rng,
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SelectionRange: rng,
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}
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return []protocol.CallHierarchyItem{callHierarchyItem}, nil
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}
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// IncomingCalls returns an array of CallHierarchyIncomingCall for a file and the position within the file
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func IncomingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyIncomingCall, error) {
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ctx, done := event.Start(ctx, "source.incomingCalls")
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defer done()
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return []protocol.CallHierarchyIncomingCall{}, nil
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}
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// OutgoingCalls returns an array of CallHierarchyOutgoingCall for a file and the position within the file
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func OutgoingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyOutgoingCall, error) {
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ctx, done := event.Start(ctx, "source.outgoingCalls")
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defer done()
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return []protocol.CallHierarchyOutgoingCall{}, nil
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}
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