mirror of
https://github.com/golang/go
synced 2024-10-01 05:28:33 -06:00
7927dbab1b
This moves the fileset down to the base cache, the overlays down to the session and stores the environment on the view. packages.Config is no longer part of any public API, and the config is build on demand by combining all the layers of cache. Also added some documentation to the main source pacakge interfaces. Change-Id: I058092ad2275d433864d1f58576fc55e194607a6 Reviewed-on: https://go-review.googlesource.com/c/tools/+/178017 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
// Copyright 2019 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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"fmt"
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"go/ast"
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"golang.org/x/tools/internal/lsp/snippet"
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)
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// structFieldSnippets calculates the plain and placeholder snippets for struct literal field names.
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func (c *completer) structFieldSnippets(label, detail string) (*snippet.Builder, *snippet.Builder) {
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clInfo := c.enclosingCompositeLiteral
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if clInfo == nil || !clInfo.isStruct() {
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return nil, nil
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}
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// If we are already in a key-value expression, we don't want a snippet.
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if clInfo.kv != nil {
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return nil, nil
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}
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// We don't want snippet unless we are completing a field name. maybeInFieldName
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// means we _might_ not be a struct field name, but this method is only called for
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// struct fields, so we can ignore that possibility.
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if !clInfo.inKey && !clInfo.maybeInFieldName {
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return nil, nil
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}
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plain, placeholder := &snippet.Builder{}, &snippet.Builder{}
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label = fmt.Sprintf("%s: ", label)
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// A plain snippet turns "Foo{Ba<>" into "Foo{Bar: <>".
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plain.WriteText(label)
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plain.WritePlaceholder(nil)
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// A placeholder snippet turns "Foo{Ba<>" into "Foo{Bar: <*int*>".
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placeholder.WriteText(label)
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placeholder.WritePlaceholder(func(b *snippet.Builder) {
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b.WriteText(detail)
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})
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// If the cursor position is on a different line from the literal's opening brace,
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// we are in a multiline literal.
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if c.view.Session().Cache().FileSet().Position(c.pos).Line != c.view.Session().Cache().FileSet().Position(clInfo.cl.Lbrace).Line {
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plain.WriteText(",")
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placeholder.WriteText(",")
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}
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return plain, placeholder
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}
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// functionCallSnippets calculates the plain and placeholder snippets for function calls.
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func (c *completer) functionCallSnippets(name string, params []string) (*snippet.Builder, *snippet.Builder) {
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// If we are the left side (i.e. "Fun") part of a call expression,
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// we don't want a snippet since there are already parens present.
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if len(c.path) > 1 {
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switch n := c.path[1].(type) {
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case *ast.CallExpr:
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if n.Fun == c.path[0] {
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return nil, nil
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}
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case *ast.SelectorExpr:
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if len(c.path) > 2 {
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if call, ok := c.path[2].(*ast.CallExpr); ok && call.Fun == c.path[1] {
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return nil, nil
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}
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}
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}
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}
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plain, placeholder := &snippet.Builder{}, &snippet.Builder{}
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label := fmt.Sprintf("%s(", name)
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// A plain snippet turns "someFun<>" into "someFunc(<>)".
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plain.WriteText(label)
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if len(params) > 0 {
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plain.WritePlaceholder(nil)
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}
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plain.WriteText(")")
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// A placeholder snippet turns "someFun<>" into "someFunc(<*i int*>, *s string*)".
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placeholder.WriteText(label)
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for i, p := range params {
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if i > 0 {
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placeholder.WriteText(", ")
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}
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placeholder.WritePlaceholder(func(b *snippet.Builder) {
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b.WriteText(p)
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})
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}
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placeholder.WriteText(")")
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return plain, placeholder
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}
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