parsing signature help

1 files changed, 46 insertions, 0 deletions

diff --git a/signature-help.c b/signature-help.c
index df8c564..b6a1105 100644
--- a/signature-help.c
+++ b/signature-help.c
@@ -10,3 +10,49 @@ void signature_help_open(Ted *ted, char32_t trigger) {
 	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;
+}