1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
import * as lc from 'vscode-languageclient';
import * as vscode from 'vscode';
import * as ra from '../src/lsp_ext';
import * as Is from 'vscode-languageclient/lib/utils/is';
import { CallHierarchyFeature } from 'vscode-languageclient/lib/callHierarchy.proposed';
import { SemanticTokensFeature, DocumentSemanticsTokensSignature } from 'vscode-languageclient/lib/semanticTokens.proposed';
import { assert } from './util';
function renderCommand(cmd: ra.CommandLink) {
return `[${cmd.title}](command:${cmd.command}?${encodeURIComponent(JSON.stringify(cmd.arguments))} '${cmd.tooltip!}')`;
}
function renderHoverActions(actions: ra.CommandLinkGroup[]): vscode.MarkdownString {
const text = actions.map(group =>
(group.title ? (group.title + " ") : "") + group.commands.map(renderCommand).join(' | ')
).join('___');
const result = new vscode.MarkdownString(text);
result.isTrusted = true;
return result;
}
export function createClient(serverPath: string, cwd: string): lc.LanguageClient {
// '.' Is the fallback if no folder is open
// TODO?: Workspace folders support Uri's (eg: file://test.txt).
// It might be a good idea to test if the uri points to a file.
const run: lc.Executable = {
command: serverPath,
options: { cwd },
};
const serverOptions: lc.ServerOptions = {
run,
debug: run,
};
const traceOutputChannel = vscode.window.createOutputChannel(
'Rust Analyzer Language Server Trace',
);
const clientOptions: lc.LanguageClientOptions = {
documentSelector: [{ scheme: 'file', language: 'rust' }],
initializationOptions: vscode.workspace.getConfiguration("rust-analyzer"),
traceOutputChannel,
middleware: {
// Workaround for https://github.com/microsoft/vscode-languageserver-node/issues/576
async provideDocumentSemanticTokens(document: vscode.TextDocument, token: vscode.CancellationToken, next: DocumentSemanticsTokensSignature) {
const res = await next(document, token);
if (res === undefined) throw new Error('busy');
return res;
},
async provideHover(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken, _next: lc.ProvideHoverSignature) {
return client.sendRequest(lc.HoverRequest.type, client.code2ProtocolConverter.asTextDocumentPositionParams(document, position), token).then(
(result) => {
const hover = client.protocol2CodeConverter.asHover(result);
if (hover) {
const actions = (<any>result).actions;
if (actions) {
hover.contents.push(renderHoverActions(actions));
}
}
return hover;
},
(error) => {
client.logFailedRequest(lc.HoverRequest.type, error);
return Promise.resolve(null);
});
},
// Using custom handling of CodeActions where each code action is resloved lazily
// That's why we are not waiting for any command or edits
async provideCodeActions(document: vscode.TextDocument, range: vscode.Range, context: vscode.CodeActionContext, token: vscode.CancellationToken, _next: lc.ProvideCodeActionsSignature) {
const params: lc.CodeActionParams = {
textDocument: client.code2ProtocolConverter.asTextDocumentIdentifier(document),
range: client.code2ProtocolConverter.asRange(range),
context: client.code2ProtocolConverter.asCodeActionContext(context)
};
return client.sendRequest(lc.CodeActionRequest.type, params, token).then((values) => {
if (values === null) return undefined;
const result: (vscode.CodeAction | vscode.Command)[] = [];
const groups = new Map<string, { index: number; items: vscode.CodeAction[] }>();
for (const item of values) {
// In our case we expect to get code edits only from diagnostics
if (lc.CodeAction.is(item)) {
assert(!item.command, "We don't expect to receive commands in CodeActions");
const action = client.protocol2CodeConverter.asCodeAction(item);
result.push(action);
continue;
}
assert(isCodeActionWithoutEditsAndCommands(item), "We don't expect edits or commands here");
const action = new vscode.CodeAction(item.title);
const group = (item as any).group;
const id = (item as any).id;
const resolveParams: ra.ResolveCodeActionParams = {
id: id,
codeActionParams: params
};
action.command = {
command: "rust-analyzer.resolveCodeAction",
title: item.title,
arguments: [resolveParams],
};
if (group) {
let entry = groups.get(group);
if (!entry) {
entry = { index: result.length, items: [] };
groups.set(group, entry);
result.push(action);
}
entry.items.push(action);
} else {
result.push(action);
}
}
for (const [group, { index, items }] of groups) {
if (items.length === 1) {
result[index] = items[0];
} else {
const action = new vscode.CodeAction(group);
action.command = {
command: "rust-analyzer.applyActionGroup",
title: "",
arguments: [items.map((item) => {
return { label: item.title, arguments: item.command!!.arguments!![0] };
})],
};
result[index] = action;
}
}
return result;
},
(_error) => undefined
);
}
} as any
};
const client = new lc.LanguageClient(
'rust-analyzer',
'Rust Analyzer Language Server',
serverOptions,
clientOptions,
);
// To turn on all proposed features use: client.registerProposedFeatures();
// Here we want to enable CallHierarchyFeature and SemanticTokensFeature
// since they are available on stable.
// Note that while these features are stable in vscode their LSP protocol
// implementations are still in the "proposed" category for 3.16.
client.registerFeature(new CallHierarchyFeature(client));
client.registerFeature(new SemanticTokensFeature(client));
client.registerFeature(new ExperimentalFeatures());
return client;
}
class ExperimentalFeatures implements lc.StaticFeature {
fillClientCapabilities(capabilities: lc.ClientCapabilities): void {
const caps: any = capabilities.experimental ?? {};
caps.snippetTextEdit = true;
caps.codeActionGroup = true;
caps.resolveCodeAction = true;
caps.hoverActions = true;
caps.statusNotification = true;
capabilities.experimental = caps;
}
initialize(_capabilities: lc.ServerCapabilities<any>, _documentSelector: lc.DocumentSelector | undefined): void {
}
}
function isCodeActionWithoutEditsAndCommands(value: any): boolean {
const candidate: lc.CodeAction = value;
return candidate && Is.string(candidate.title) &&
(candidate.diagnostics === void 0 || Is.typedArray(candidate.diagnostics, lc.Diagnostic.is)) &&
(candidate.kind === void 0 || Is.string(candidate.kind)) &&
(candidate.edit === void 0 && candidate.command === void 0);
}
|
