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feat(lsp): initial support for textDocument/rename

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flow keybinds: changes f2 from toggle_input_mode to rename_symbol and
moves toggle_input_mode command to ctrl+shift+f2 (since ctrl+f2 is
already bound to insert_command_name)

the replacement text is hard coded for now. i've checked that replace
works with zls and pylsp which send WorkspaceEdit response messages in
different shapes - zls sends shape `{"changes": {}}` while pylsp sends
`{"documentChanges": []}`.

currently the 'rename_symbol_item' commands are sent one at a time.
however they should be buffered and be performed between one
buf_for_update, update_buf pair.  this will be addressed in a follow up.
This commit is contained in:
Travis Staloch 2025-01-12 14:00:48 -08:00 • committed by CJ van den Berg
parent 7558a63819
commit 1fd4455adb
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
5 changed files with 172 additions and 1 deletions
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src/Project.zig
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@ -782,6 +782,118 @@ fn send_completion_item(_: *Self, to: tp.pid_ref, file_path: []const u8, row: us
}) catch error.ClientFailed;
}
pub fn rename_symbol(self: *Self, from: tp.pid_ref, file_path: []const u8, row: usize, col: usize) (LspOrClientError || InvalidMessageError || cbor.Error)!void {
const lsp = try self.get_language_server(file_path);
const uri = try self.make_URI(file_path);
defer self.allocator.free(uri);
const response = lsp.send_request(self.allocator, "textDocument/rename", .{
.textDocument = .{ .uri = uri },
.position = .{ .line = row, .character = col },
.newName = "foobar",
}) catch return error.LspFailed;
defer self.allocator.free(response.buf);
var result: []const u8 = undefined;
if (try cbor.match(response.buf, .{ "child", tp.string, "result", tp.map })) {
if (try cbor.match(response.buf, .{ tp.any, tp.any, tp.any, tp.extract_cbor(&result) }))
try self.send_rename_symbol_map(from, result);
}
}
// parse a WorkspaceEdit record which may have shape {"changes": {}} or {"documentChanges": []}
// https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#workspaceEdit
fn send_rename_symbol_map(self: *Self, to: tp.pid_ref, result: []const u8) (ClientError || InvalidMessageError || cbor.Error)!void {
var iter = result;
var len = cbor.decodeMapHeader(&iter) catch return error.InvalidMessage;
var changes: []const u8 = "";
while (len > 0) : (len -= 1) {
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "changes")) {
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&changes)))) return error.InvalidMessageField;
return self.send_rename_symbol_changes(to, changes) catch error.ClientFailed;
} else if (std.mem.eql(u8, field_name, "documentChanges")) {
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&changes)))) return error.InvalidMessageField;
return self.send_rename_symbol_doc_changes(to, changes) catch error.ClientFailed;
} else {
try cbor.skipValue(&iter);
}
}
return error.ClientFailed;
}
fn send_rename_symbol_changes(self: *Self, to: tp.pid_ref, changes: []const u8) (ClientError || InvalidMessageError || cbor.Error)!void {
// log.logger("lsp").print("send_rename_symbol_changes()\n", .{});
var iter = changes;
var files_len = cbor.decodeMapHeader(&iter) catch return error.InvalidMessage;
while (files_len > 0) : (files_len -= 1) {
var file_uri: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &file_uri))) return error.InvalidMessage;
try send_rename_symbol_item(self, to, file_uri, iter);
}
}
fn send_rename_symbol_doc_changes(self: *Self, to: tp.pid_ref, changes: []const u8) (ClientError || InvalidMessageError || cbor.Error)!void {
var iter = changes;
var changes_len = cbor.decodeArrayHeader(&iter) catch return error.InvalidMessage;
while (changes_len > 0) : (changes_len -= 1) {
var dc_fields_len = cbor.decodeMapHeader(&iter) catch return error.InvalidMessage;
while (dc_fields_len > 0) : (dc_fields_len -= 1) {
var file_uri: []const u8 = "";
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "textDocument")) {
var td_fields_len = cbor.decodeMapHeader(&iter) catch return error.InvalidMessage;
while (td_fields_len > 0) : (td_fields_len -= 1) {
var td_field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &td_field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, td_field_name, "uri")) {
if (!(try cbor.matchString(&iter, &file_uri))) return error.InvalidMessage;
} else try cbor.skipValue(&iter); // skip "version": 1
}
} else if (std.mem.eql(u8, field_name, "edits")) {
if (file_uri.len == 0) return error.InvalidMessage;
try send_rename_symbol_item(self, to, file_uri, iter);
}
}
}
}
// https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textEdit
fn send_rename_symbol_item(_: *Self, to: tp.pid_ref, file_uri: []const u8, bytes: []const u8) (ClientError || InvalidMessageError || cbor.Error)!void {
var iter = bytes;
var text_edits_len = cbor.decodeArrayHeader(&iter) catch return error.InvalidMessage;
while (text_edits_len > 0) : (text_edits_len -= 1) {
var m_range: ?Range = null;
var new_text: []const u8 = "";
var edits_len = cbor.decodeMapHeader(&iter) catch return error.InvalidMessage;
while (edits_len > 0) : (edits_len -= 1) {
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "range")) {
var range: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&range)))) return error.InvalidMessageField;
m_range = try read_range(range);
} else if (std.mem.eql(u8, field_name, "newText")) {
if (!(try cbor.matchString(&iter, &new_text))) return error.InvalidMessageField;
} else {
try cbor.skipValue(&iter);
}
}
const range = m_range orelse return error.InvalidMessageField;
to.send(.{ "cmd", "rename_symbol_item", .{
file_uri,
range.start.line,
range.start.character,
range.end.line,
range.end.character,
new_text,
} }) catch return error.ClientFailed;
}
}
pub fn hover(self: *Self, from: tp.pid_ref, file_path: []const u8, row: usize, col: usize) (LspOrClientError || InvalidMessageError || cbor.Error)!void {
const lsp = try self.get_language_server(file_path);
const uri = try self.make_URI(file_path);