Add support for documenting built-in annotations

5 files changed, 166 insertions, 0 deletions

diff --git a/modules/gdscript/doc_classes/@GDScript.xml b/modules/gdscript/doc_classes/@GDScript.xml
index 70151c4d21..e672ea6454 100644
--- a/modules/gdscript/doc_classes/@GDScript.xml
+++ b/modules/gdscript/doc_classes/@GDScript.xml
@@ -257,4 +257,145 @@
 			[b]Note:[/b] "Not a Number" is only a concept with floating-point numbers, and has no equivalent for integers. Dividing an integer [code]0[/code] by [code]0[/code] will not result in [constant NAN] and will result in a run-time error instead.
 		</constant>
 	</constants>
+	<annotations>
+		<annotation name="@export">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_color_no_alpha">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_dir">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_enum" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="names" type="String" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_exp_easing">
+			<return type="void" />
+			<argument index="0" name="hint1" type="String" default="null" />
+			<argument index="1" name="hint2" type="String" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_file" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="filter" type="String" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="names" type="String" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_2d_navigation">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_2d_physics">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_2d_render">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_3d_navigation">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_3d_physics">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_flags_3d_render">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_global_dir">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_global_file" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="filter" type="String" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_multiline">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_node_path" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="type" type="String" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_placeholder">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@export_range">
+			<return type="void" />
+			<argument index="0" name="min" type="float" />
+			<argument index="1" name="max" type="float" />
+			<argument index="2" name="step" type="float" default="null" />
+			<argument index="3" name="slider1" type="String" default="null" />
+			<argument index="4" name="slider2" type="String" default="null" />
+			<argument index="5" name="slider3" type="String" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@icon">
+			<return type="void" />
+			<argument index="0" name="icon_path" type="String" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@onready">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@rpc" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="mode" type="String" default="null" />
+			<argument index="1" name="sync" type="String" default="null" />
+			<argument index="2" name="transfer_mode" type="String" default="null" />
+			<argument index="3" name="transfer_channel" type="int" default="null" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@tool">
+			<return type="void" />
+			<description>
+			</description>
+		</annotation>
+		<annotation name="@warning_ignore" qualifiers="vararg">
+			<return type="void" />
+			<argument index="0" name="warning" type="String" />
+			<description>
+			</description>
+		</annotation>
+	</annotations>
 </class>
diff --git a/modules/gdscript/gdscript.h b/modules/gdscript/gdscript.h
index feb0a237df..e9a206f48b 100644
--- a/modules/gdscript/gdscript.h
+++ b/modules/gdscript/gdscript.h
@@ -489,6 +489,7 @@ public:
 
 	virtual void get_public_functions(List<MethodInfo> *p_functions) const override;
 	virtual void get_public_constants(List<Pair<String, Variant>> *p_constants) const override;
+	virtual void get_public_annotations(List<MethodInfo> *p_annotations) const override;
 
 	virtual void profiling_start() override;
 	virtual void profiling_stop() override;
diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 474c8094f2..d62104fb5b 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -445,6 +445,16 @@ void GDScriptLanguage::get_public_constants(List<Pair<String, Variant>> *p_const
 	p_constants->push_back(nan);
 }
 
+void GDScriptLanguage::get_public_annotations(List<MethodInfo> *p_annotations) const {
+	GDScriptParser parser;
+	List<MethodInfo> annotations;
+	parser.get_annotation_list(&annotations);
+
+	for (const MethodInfo &E : annotations) {
+		p_annotations->push_back(E);
+	}
+}
+
 String GDScriptLanguage::make_function(const String &p_class, const String &p_name, const PackedStringArray &p_args) const {
 #ifdef TOOLS_ENABLED
 	bool th = EditorSettings::get_singleton()->get_setting("text_editor/completion/add_type_hints");
@@ -3376,6 +3386,15 @@ static Error _lookup_symbol_from_base(const GDScriptParser::DataType &p_base, co
 				return OK;
 			}
 		} break;
+		case GDScriptParser::COMPLETION_ANNOTATION: {
+			const String annotation_symbol = "@" + p_symbol;
+			if (parser.annotation_exists(annotation_symbol)) {
+				r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_ANNOTATION;
+				r_result.class_name = "@GDScript";
+				r_result.class_member = annotation_symbol;
+				return OK;
+			}
+		} break;
 		default: {
 		}
 	}
diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index ca430b0f72..b69eef0a75 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -105,6 +105,10 @@ void GDScriptParser::get_annotation_list(List<MethodInfo> *r_annotations) const
 	}
 }
 
+bool GDScriptParser::annotation_exists(const String &p_annotation_name) const {
+	return valid_annotations.has(p_annotation_name);
+}
+
 GDScriptParser::GDScriptParser() {
 	// Register valid annotations.
 	// TODO: Should this be static?
diff --git a/modules/gdscript/gdscript_parser.h b/modules/gdscript/gdscript_parser.h
index e3f8d4b8ba..8f3862b324 100644
--- a/modules/gdscript/gdscript_parser.h
+++ b/modules/gdscript/gdscript_parser.h
@@ -1413,6 +1413,7 @@ public:
 	CompletionContext get_completion_context() const { return completion_context; }
 	CompletionCall get_completion_call() const { return completion_call; }
 	void get_annotation_list(List<MethodInfo> *r_annotations) const;
+	bool annotation_exists(const String &p_annotation_name) const;
 
 	const List<ParserError> &get_errors() const { return errors; }
 	const List<String> get_dependencies() const {