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// deals with textDocument/signatureHelp LSP requests
void signature_help_open(Ted *ted, char32_t trigger) {
(void)trigger; // for now we don't send context
TextBuffer *buffer = ted->active_buffer;
if (!buffer) return;
LSP *lsp = buffer_lsp(buffer);
LSPRequest request = {.type = LSP_REQUEST_SIGNATURE_HELP};
LSPRequestSignatureHelp *s = &request.data.signature_help;
s->position = buffer_cursor_pos_as_lsp_document_position(buffer);
lsp_send_request(lsp, &request);
}
static void signature_help_clear(SignatureHelp *help) {
for (int i = 0; i < help->signature_count; ++i) {
Signature sig = help->signatures[i];
free(sig.label_pre);
free(sig.label_active);
free(sig.label_post);
}
memset(help->signatures, 0, sizeof help->signatures);
}
void signature_help_process_lsp_response(Ted *ted, const LSPResponse *response) {
if (response->request.type != LSP_REQUEST_SIGNATURE_HELP)
return;
SignatureHelp *help = &ted->signature_help;
const LSPResponseSignatureHelp *lsp_help = &response->data.signature_help;
u32 signature_count = arr_len(lsp_help->signatures);
if (signature_count > SIGNATURE_HELP_MAX)
signature_count = SIGNATURE_HELP_MAX;
signature_help_clear(help);
for (u32 s = 0; s < signature_count; ++s) {
Signature *signature = &help->signatures[s];
LSPSignatureInformation *lsp_signature = &lsp_help->signatures[s];
const char *label = lsp_response_string(response, lsp_signature->label);
size_t start = unicode_utf16_to_utf8_offset(label, lsp_signature->active_start);
size_t end = unicode_utf16_to_utf8_offset(label, lsp_signature->active_end);
if (start == (size_t)-1) {
assert(0);
start = 0;
}
if (end == (size_t)-1) {
assert(0);
end = 0;
}
u32 active_start = (u32)start;
u32 active_end = (u32)end;
signature->label_pre = strn_dup(label, active_start);
signature->label_active = strn_dup(label + active_start, active_end - active_start);
signature->label_post = str_dup(label + active_end);
printf("%s*%s*%s\n",signature->label_pre,signature->label_active,signature->label_post);
}
help->signature_count = (u16)signature_count;
}
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