From 9a8421aa058437ce01bc67244bb8dcd0f15fc9e6 Mon Sep 17 00:00:00 2001
From: Francois Belair <razoric480@gmail.com>
Date: Sun, 11 Jul 2021 15:51:31 -0400
Subject: Implement applyEdit in LSP for signal connecting

---
 .../language_server/gdscript_workspace.cpp         | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'modules/gdscript/language_server/gdscript_workspace.cpp')

diff --git a/modules/gdscript/language_server/gdscript_workspace.cpp b/modules/gdscript/language_server/gdscript_workspace.cpp
index 1915c92cbf..c0a84d63dc 100644
--- a/modules/gdscript/language_server/gdscript_workspace.cpp
+++ b/modules/gdscript/language_server/gdscript_workspace.cpp
@@ -42,6 +42,7 @@
 #include "scene/resources/packed_scene.h"
 
 void GDScriptWorkspace::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("apply_new_signal"), &GDScriptWorkspace::apply_new_signal);
 	ClassDB::bind_method(D_METHOD("didDeleteFiles"), &GDScriptWorkspace::did_delete_files);
 	ClassDB::bind_method(D_METHOD("symbol"), &GDScriptWorkspace::symbol);
 	ClassDB::bind_method(D_METHOD("parse_script", "path", "content"), &GDScriptWorkspace::parse_script);
@@ -52,6 +53,54 @@ void GDScriptWorkspace::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("generate_script_api", "path"), &GDScriptWorkspace::generate_script_api);
 }
 
+void GDScriptWorkspace::apply_new_signal(Object *obj, String function, PackedStringArray args) {
+	String function_signature = "func " + function;
+	Ref<Script> script = obj->get_script();
+
+	String source = script->get_source_code();
+
+	if (source.find(function_signature) != -1) {
+		return;
+	}
+
+	int first_class = source.find("\nclass ");
+	int start_line = 0;
+	if (first_class != -1) {
+		start_line = source.substr(0, first_class).split("\n").size();
+	} else {
+		start_line = source.split("\n").size();
+	}
+
+	String function_body = "\n\n" + function_signature + "(";
+	for (int i = 0; i < args.size(); ++i) {
+		function_body += args[i];
+		if (i < args.size() - 1) {
+			function_body += ", ";
+		}
+	}
+	function_body += ")";
+	if (EditorSettings::get_singleton()->get_setting("text_editor/completion/add_type_hints")) {
+		function_body += " -> void";
+	}
+	function_body += ":\n\tpass # Replace with function body.\n";
+
+	lsp::TextEdit text_edit;
+
+	if (first_class != -1) {
+		function_body += "\n\n";
+	}
+	text_edit.range.end.line = text_edit.range.start.line = start_line;
+
+	text_edit.newText = function_body;
+
+	String uri = get_file_uri(script->get_path());
+
+	lsp::ApplyWorkspaceEditParams params;
+	params.edit.add_edit(uri, text_edit);
+
+	GDScriptLanguageProtocol::get_singleton()->request_client("workspace/applyEdit", params.to_json());
+}
+
 void GDScriptWorkspace::did_delete_files(const Dictionary &p_params) {
 	Array files = p_params["files"];
 	for (int i = 0; i < files.size(); ++i) {
@@ -325,6 +374,9 @@ Error GDScriptWorkspace::initialize() {
 		}
 	}
 
+	EditorNode *editor_node = EditorNode::get_singleton();
+	editor_node->connect("script_add_function_request", callable_mp(this, &GDScriptWorkspace::apply_new_signal));
+
 	return OK;
 }
 
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