Add GDExtension support to Script

* Ability to create script languages from GDExtension
* Some additions to gdnative_extension.h to make this happen
* Moved the GDExtension binder to core

This now allows creating scripting languages from GDExtension, with the same ease as if it was a module. It replaces the old PluginScript from Godot 3.x.
Warning: GodotCPP will need to be updated to support this (it may be a bit of work as ScriptInstance needs to be created over there again).

3 files changed, 17 insertions, 15 deletions

diff --git a/modules/gdscript/language_server/gdscript_text_document.cpp b/modules/gdscript/language_server/gdscript_text_document.cpp
index 961295b076..d5ef8fed74 100644
--- a/modules/gdscript/language_server/gdscript_text_document.cpp
+++ b/modules/gdscript/language_server/gdscript_text_document.cpp
@@ -166,49 +166,51 @@ Array GDScriptTextDocument::completion(const Dictionary &p_params) {
 	params.load(p_params);
 	Dictionary request_data = params.to_json();
 
-	List<ScriptCodeCompletionOption> options;
+	List<ScriptLanguage::CodeCompletionOption> options;
 	GDScriptLanguageProtocol::get_singleton()->get_workspace()->completion(params, &options);
 
 	if (!options.is_empty()) {
 		int i = 0;
 		arr.resize(options.size());
 
-		for (const ScriptCodeCompletionOption &option : options) {
+		for (const ScriptLanguage::CodeCompletionOption &option : options) {
 			lsp::CompletionItem item;
 			item.label = option.display;
 			item.data = request_data;
 
 			switch (option.kind) {
-				case ScriptCodeCompletionOption::KIND_ENUM:
+				case ScriptLanguage::CODE_COMPLETION_KIND_ENUM:
 					item.kind = lsp::CompletionItemKind::Enum;
 					break;
-				case ScriptCodeCompletionOption::KIND_CLASS:
+				case ScriptLanguage::CODE_COMPLETION_KIND_CLASS:
 					item.kind = lsp::CompletionItemKind::Class;
 					break;
-				case ScriptCodeCompletionOption::KIND_MEMBER:
+				case ScriptLanguage::CODE_COMPLETION_KIND_MEMBER:
 					item.kind = lsp::CompletionItemKind::Property;
 					break;
-				case ScriptCodeCompletionOption::KIND_FUNCTION:
+				case ScriptLanguage::CODE_COMPLETION_KIND_FUNCTION:
 					item.kind = lsp::CompletionItemKind::Method;
 					break;
-				case ScriptCodeCompletionOption::KIND_SIGNAL:
+				case ScriptLanguage::CODE_COMPLETION_KIND_SIGNAL:
 					item.kind = lsp::CompletionItemKind::Event;
 					break;
-				case ScriptCodeCompletionOption::KIND_CONSTANT:
+				case ScriptLanguage::CODE_COMPLETION_KIND_CONSTANT:
 					item.kind = lsp::CompletionItemKind::Constant;
 					break;
-				case ScriptCodeCompletionOption::KIND_VARIABLE:
+				case ScriptLanguage::CODE_COMPLETION_KIND_VARIABLE:
 					item.kind = lsp::CompletionItemKind::Variable;
 					break;
-				case ScriptCodeCompletionOption::KIND_FILE_PATH:
+				case ScriptLanguage::CODE_COMPLETION_KIND_FILE_PATH:
 					item.kind = lsp::CompletionItemKind::File;
 					break;
-				case ScriptCodeCompletionOption::KIND_NODE_PATH:
+				case ScriptLanguage::CODE_COMPLETION_KIND_NODE_PATH:
 					item.kind = lsp::CompletionItemKind::Snippet;
 					break;
-				case ScriptCodeCompletionOption::KIND_PLAIN_TEXT:
+				case ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT:
 					item.kind = lsp::CompletionItemKind::Text;
 					break;
+				default: {
+				}
 			}
 
 			arr[i] = item.to_json();
diff --git a/modules/gdscript/language_server/gdscript_workspace.cpp b/modules/gdscript/language_server/gdscript_workspace.cpp
index d20b243616..1bf0b40842 100644
--- a/modules/gdscript/language_server/gdscript_workspace.cpp
+++ b/modules/gdscript/language_server/gdscript_workspace.cpp
@@ -571,7 +571,7 @@ Node *GDScriptWorkspace::_get_owner_scene_node(String p_path) {
 	return owner_scene_node;
 }
 
-void GDScriptWorkspace::completion(const lsp::CompletionParams &p_params, List<ScriptCodeCompletionOption> *r_options) {
+void GDScriptWorkspace::completion(const lsp::CompletionParams &p_params, List<ScriptLanguage::CodeCompletionOption> *r_options) {
 	String path = get_file_path(p_params.textDocument.uri);
 	String call_hint;
 	bool forced = false;
@@ -638,7 +638,7 @@ const lsp::DocumentSymbol *GDScriptWorkspace::resolve_symbol(const lsp::TextDocu
 					symbol_identifier = "_init";
 				}
 				if (OK == GDScriptLanguage::get_singleton()->lookup_code(parser->get_text_for_lookup_symbol(pos, symbol_identifier, p_func_required), symbol_identifier, path, nullptr, ret)) {
-					if (ret.type == ScriptLanguage::LookupResult::RESULT_SCRIPT_LOCATION) {
+					if (ret.type == ScriptLanguage::LOOKUP_RESULT_SCRIPT_LOCATION) {
 						String target_script_path = path;
 						if (!ret.script.is_null()) {
 							target_script_path = ret.script->get_path();
diff --git a/modules/gdscript/language_server/gdscript_workspace.h b/modules/gdscript/language_server/gdscript_workspace.h
index ce5bba5f00..92e78f8992 100644
--- a/modules/gdscript/language_server/gdscript_workspace.h
+++ b/modules/gdscript/language_server/gdscript_workspace.h
@@ -85,7 +85,7 @@ public:
 	String get_file_uri(const String &p_path) const;
 
 	void publish_diagnostics(const String &p_path);
-	void completion(const lsp::CompletionParams &p_params, List<ScriptCodeCompletionOption> *r_options);
+	void completion(const lsp::CompletionParams &p_params, List<ScriptLanguage::CodeCompletionOption> *r_options);
 
 	const lsp::DocumentSymbol *resolve_symbol(const lsp::TextDocumentPositionParams &p_doc_pos, const String &p_symbol_name = "", bool p_func_required = false);
 	void resolve_related_symbols(const lsp::TextDocumentPositionParams &p_doc_pos, List<const lsp::DocumentSymbol *> &r_list);