Extract Syntax highlighting from TextEdit and add EditorSyntaxHighlighter

- Extacted all syntax highlighting code from text edit
- Removed enable syntax highlighting from text edit
- Added line_edited_from signal to text_edit
- Renamed get/set_syntax_highlighting to get/set_syntax_highlighter
- Added EditorSyntaxHighligher

10 files changed, 309 insertions, 252 deletions

diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index 237aefb1b9..67268e0027 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -51,6 +51,165 @@
 #include "servers/display_server.h"
 #include "text_editor.h"
 
+/*** SYNTAX HIGHLIGHTER ****/
+
+String EditorSyntaxHighlighter::_get_name() const {
+	ScriptInstance *si = get_script_instance();
+	if (si && si->has_method("_get_name")) {
+		return si->call("_get_name");
+	}
+	return "Unnamed";
+}
+
+Array EditorSyntaxHighlighter::_get_supported_languages() const {
+	ScriptInstance *si = get_script_instance();
+	if (si && si->has_method("_get_supported_languages")) {
+		return si->call("_get_supported_languages");
+	}
+	return Array();
+}
+
+Ref<EditorSyntaxHighlighter> EditorSyntaxHighlighter::_create() const {
+	Ref<EditorSyntaxHighlighter> syntax_highlighter;
+	syntax_highlighter.instance();
+	if (get_script_instance()) {
+		syntax_highlighter->set_script(get_script_instance()->get_script());
+	}
+	return syntax_highlighter;
+}
+
+void EditorSyntaxHighlighter::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("_get_edited_resource"), &EditorSyntaxHighlighter::_get_edited_resource);
+
+	BIND_VMETHOD(MethodInfo(Variant::STRING, "_get_name"));
+	BIND_VMETHOD(MethodInfo(Variant::ARRAY, "_get_supported_languages"));
+	BIND_VMETHOD(MethodInfo(Variant::ARRAY, "_get_supported_extentions"));
+}
+
+////
+
+void EditorStandardSyntaxHighlighter::_update_cache() {
+	highlighter->set_text_edit(text_edit);
+	highlighter->clear_keyword_colors();
+	highlighter->clear_member_keyword_colors();
+	highlighter->clear_color_regions();
+
+	highlighter->set_symbol_color(EDITOR_GET("text_editor/highlighting/symbol_color"));
+	highlighter->set_function_color(EDITOR_GET("text_editor/highlighting/function_color"));
+	highlighter->set_number_color(EDITOR_GET("text_editor/highlighting/number_color"));
+	highlighter->set_member_variable_color(EDITOR_GET("text_editor/highlighting/member_variable_color"));
+
+	/* Engine types. */
+	const Color type_color = EDITOR_GET("text_editor/highlighting/engine_type_color");
+	List<StringName> types;
+	ClassDB::get_class_list(&types);
+	for (List<StringName>::Element *E = types.front(); E; E = E->next()) {
+		String n = E->get();
+		if (n.begins_with("_")) {
+			n = n.substr(1, n.length());
+		}
+		highlighter->add_keyword_color(n, type_color);
+	}
+
+	/* User types. */
+	const Color usertype_color = EDITOR_GET("text_editor/highlighting/user_type_color");
+	List<StringName> global_classes;
+	ScriptServer::get_global_class_list(&global_classes);
+	for (List<StringName>::Element *E = global_classes.front(); E; E = E->next()) {
+		highlighter->add_keyword_color(E->get(), usertype_color);
+	}
+
+	/* Autoloads. */
+	Map<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
+	for (Map<StringName, ProjectSettings::AutoloadInfo>::Element *E = autoloads.front(); E; E = E->next()) {
+		const ProjectSettings::AutoloadInfo &info = E->value();
+		if (info.is_singleton) {
+			highlighter->add_keyword_color(info.name, usertype_color);
+		}
+	}
+
+	const Ref<Script> script = _get_edited_resource();
+	if (script.is_valid()) {
+		/* Core types. */
+		const Color basetype_color = EDITOR_GET("text_editor/highlighting/base_type_color");
+		List<String> core_types;
+		script->get_language()->get_core_type_words(&core_types);
+		for (List<String>::Element *E = core_types.front(); E; E = E->next()) {
+			highlighter->add_keyword_color(E->get(), basetype_color);
+		}
+
+		/* Reserved words. */
+		const Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
+		List<String> keywords;
+		script->get_language()->get_reserved_words(&keywords);
+		for (List<String>::Element *E = keywords.front(); E; E = E->next()) {
+			highlighter->add_keyword_color(E->get(), keyword_color);
+		}
+
+		/* Member types. */
+		const Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
+		StringName instance_base = script->get_instance_base_type();
+		if (instance_base != StringName()) {
+			List<PropertyInfo> plist;
+			ClassDB::get_property_list(instance_base, &plist);
+			for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
+				String name = E->get().name;
+				if (E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_SUBGROUP) {
+					continue;
+				}
+				if (name.find("/") != -1) {
+					continue;
+				}
+				highlighter->add_member_keyword_color(name, member_variable_color);
+			}
+
+			List<String> clist;
+			ClassDB::get_integer_constant_list(instance_base, &clist);
+			for (List<String>::Element *E = clist.front(); E; E = E->next()) {
+				highlighter->add_member_keyword_color(E->get(), member_variable_color);
+			}
+		}
+
+		/* Comments */
+		const Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
+		List<String> comments;
+		script->get_language()->get_comment_delimiters(&comments);
+		for (List<String>::Element *E = comments.front(); E; E = E->next()) {
+			String comment = E->get();
+			String beg = comment.get_slice(" ", 0);
+			String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
+			highlighter->add_color_region(beg, end, comment_color, end == "");
+		}
+
+		/* Strings */
+		const Color string_color = EDITOR_GET("text_editor/highlighting/string_color");
+		List<String> strings;
+		script->get_language()->get_string_delimiters(&strings);
+		for (List<String>::Element *E = strings.front(); E; E = E->next()) {
+			String string = E->get();
+			String beg = string.get_slice(" ", 0);
+			String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
+			highlighter->add_color_region(beg, end, string_color, end == "");
+		}
+	}
+}
+
+Ref<EditorSyntaxHighlighter> EditorStandardSyntaxHighlighter::_create() const {
+	Ref<EditorStandardSyntaxHighlighter> syntax_highlighter;
+	syntax_highlighter.instance();
+	return syntax_highlighter;
+}
+
+////
+
+Ref<EditorSyntaxHighlighter> EditorPlainTextSyntaxHighlighter::_create() const {
+	Ref<EditorPlainTextSyntaxHighlighter> syntax_highlighter;
+	syntax_highlighter.instance();
+	return syntax_highlighter;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
 /*** SCRIPT EDITOR ****/
 
 void ScriptEditorBase::_bind_methods() {
@@ -2022,7 +2181,7 @@ bool ScriptEditor::edit(const RES &p_resource, int p_line, int p_col, bool p_gra
 	if (p_resource->get_class_name() != StringName("VisualScript")) {
 		bool highlighter_set = false;
 		for (int i = 0; i < syntax_highlighters.size(); i++) {
-			Ref<SyntaxHighlighter> highlighter = syntax_highlighters[i]->_create();
+			Ref<EditorSyntaxHighlighter> highlighter = syntax_highlighters[i]->_create();
 			if (highlighter.is_null()) {
 				continue;
 			}
@@ -2830,13 +2989,17 @@ void ScriptEditor::_open_script_request(const String &p_path) {
 	}
 }
 
-void ScriptEditor::register_syntax_highlighter(const Ref<SyntaxHighlighter> &p_syntax_highlighter) {
+void ScriptEditor::register_syntax_highlighter(const Ref<EditorSyntaxHighlighter> &p_syntax_highlighter) {
+	ERR_FAIL_COND(p_syntax_highlighter.is_null());
+
 	if (syntax_highlighters.find(p_syntax_highlighter) == -1) {
 		syntax_highlighters.push_back(p_syntax_highlighter);
 	}
 }
 
-void ScriptEditor::unregister_syntax_highlighter(const Ref<SyntaxHighlighter> &p_syntax_highlighter) {
+void ScriptEditor::unregister_syntax_highlighter(const Ref<EditorSyntaxHighlighter> &p_syntax_highlighter) {
+	ERR_FAIL_COND(p_syntax_highlighter.is_null());
+
 	syntax_highlighters.erase(p_syntax_highlighter);
 }
 
diff --git a/editor/plugins/script_editor_plugin.h b/editor/plugins/script_editor_plugin.h
index 4ce3b0e4ad..3891af4091 100644
--- a/editor/plugins/script_editor_plugin.h
+++ b/editor/plugins/script_editor_plugin.h
@@ -47,6 +47,53 @@
 #include "scene/main/timer.h"
 #include "scene/resources/text_file.h"
 
+class EditorSyntaxHighlighter : public SyntaxHighlighter {
+	GDCLASS(EditorSyntaxHighlighter, SyntaxHighlighter)
+
+private:
+	REF edited_resourse;
+
+protected:
+	static void _bind_methods();
+
+public:
+	virtual String _get_name() const;
+	virtual Array _get_supported_languages() const;
+
+	void _set_edited_resource(const RES &p_res) { edited_resourse = p_res; }
+	REF _get_edited_resource() { return edited_resourse; }
+
+	virtual Ref<EditorSyntaxHighlighter> _create() const;
+};
+
+class EditorStandardSyntaxHighlighter : public EditorSyntaxHighlighter {
+	GDCLASS(EditorStandardSyntaxHighlighter, EditorSyntaxHighlighter)
+
+private:
+	Ref<CodeHighlighter> highlighter;
+
+public:
+	virtual void _update_cache() override;
+	virtual Dictionary _get_line_syntax_highlighting(int p_line) override { return highlighter->get_line_syntax_highlighting(p_line); }
+
+	virtual String _get_name() const override { return TTR("Standard"); }
+
+	virtual Ref<EditorSyntaxHighlighter> _create() const override;
+
+	EditorStandardSyntaxHighlighter() { highlighter.instance(); }
+};
+
+class EditorPlainTextSyntaxHighlighter : public EditorSyntaxHighlighter {
+	GDCLASS(EditorPlainTextSyntaxHighlighter, EditorSyntaxHighlighter)
+
+public:
+	virtual String _get_name() const override { return TTR("Plain Text"); }
+
+	virtual Ref<EditorSyntaxHighlighter> _create() const override;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
 class ScriptEditorQuickOpen : public ConfirmationDialog {
 	GDCLASS(ScriptEditorQuickOpen, ConfirmationDialog);
 
@@ -80,8 +127,8 @@ protected:
 	static void _bind_methods();
 
 public:
-	virtual void add_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) = 0;
-	virtual void set_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) = 0;
+	virtual void add_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) = 0;
+	virtual void set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) = 0;
 
 	virtual void apply_code() = 0;
 	virtual RES get_edited_resource() const = 0;
@@ -120,7 +167,6 @@ public:
 	ScriptEditorBase() {}
 };
 
-typedef SyntaxHighlighter *(*CreateSyntaxHighlighterFunc)();
 typedef ScriptEditorBase *(*CreateScriptEditorFunc)(const RES &p_resource);
 
 class EditorScriptCodeCompletionCache;
@@ -241,7 +287,7 @@ class ScriptEditor : public PanelContainer {
 	static int script_editor_func_count;
 	static CreateScriptEditorFunc script_editor_funcs[SCRIPT_EDITOR_FUNC_MAX];
 
-	Vector<Ref<SyntaxHighlighter> > syntax_highlighters;
+	Vector<Ref<EditorSyntaxHighlighter>> syntax_highlighters;
 
 	struct ScriptHistory {
 		Control *control;
@@ -440,8 +486,8 @@ public:
 
 	void set_live_auto_reload_running_scripts(bool p_enabled);
 
-	void register_syntax_highlighter(const Ref<SyntaxHighlighter> &p_syntax_highlighter);
-	void unregister_syntax_highlighter(const Ref<SyntaxHighlighter> &p_syntax_highlighter);
+	void register_syntax_highlighter(const Ref<EditorSyntaxHighlighter> &p_syntax_highlighter);
+	void unregister_syntax_highlighter(const Ref<EditorSyntaxHighlighter> &p_syntax_highlighter);
 
 	static void register_create_script_editor_function(CreateScriptEditorFunc p_func);
 
diff --git a/editor/plugins/script_text_editor.cpp b/editor/plugins/script_text_editor.cpp
index 875e6ef350..1e03d9dfab 100644
--- a/editor/plugins/script_text_editor.cpp
+++ b/editor/plugins/script_text_editor.cpp
@@ -132,7 +132,7 @@ void ScriptTextEditor::apply_code() {
 	}
 	script->set_source_code(code_editor->get_text_edit()->get_text());
 	script->update_exports();
-	_update_member_keywords();
+	code_editor->get_text_edit()->get_syntax_highlighter()->update_cache();
 }
 
 RES ScriptTextEditor::get_edited_resource() const {
@@ -155,43 +155,9 @@ void ScriptTextEditor::set_edited_resource(const RES &p_res) {
 	_validate_script();
 }
 
-void ScriptTextEditor::_update_member_keywords() {
-	member_keywords.clear();
-	code_editor->get_text_edit()->clear_member_keywords();
-	Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
-
-	StringName instance_base = script->get_instance_base_type();
-
-	if (instance_base == StringName()) {
-		return;
-	}
-	List<PropertyInfo> plist;
-	ClassDB::get_property_list(instance_base, &plist);
-
-	for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
-		String name = E->get().name;
-		if (E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_SUBGROUP) {
-			continue;
-		}
-		if (name.find("/") != -1) {
-			continue;
-		}
-
-		code_editor->get_text_edit()->add_member_keyword(name, member_variable_color);
-	}
-
-	List<String> clist;
-	ClassDB::get_integer_constant_list(instance_base, &clist);
-
-	for (List<String>::Element *E = clist.front(); E; E = E->next()) {
-		code_editor->get_text_edit()->add_member_keyword(E->get(), member_variable_color);
-	}
-}
-
 void ScriptTextEditor::_load_theme_settings() {
 	TextEdit *text_edit = code_editor->get_text_edit();
-
-	text_edit->clear_colors();
+	text_edit->clear_keywords();
 
 	Color background_color = EDITOR_GET("text_editor/highlighting/background_color");
 	Color completion_background_color = EDITOR_GET("text_editor/highlighting/completion_background_color");
@@ -210,9 +176,6 @@ void ScriptTextEditor::_load_theme_settings() {
 	Color current_line_color = EDITOR_GET("text_editor/highlighting/current_line_color");
 	Color line_length_guideline_color = EDITOR_GET("text_editor/highlighting/line_length_guideline_color");
 	Color word_highlighted_color = EDITOR_GET("text_editor/highlighting/word_highlighted_color");
-	Color number_color = EDITOR_GET("text_editor/highlighting/number_color");
-	Color function_color = EDITOR_GET("text_editor/highlighting/function_color");
-	Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
 	Color mark_color = EDITOR_GET("text_editor/highlighting/mark_color");
 	Color bookmark_color = EDITOR_GET("text_editor/highlighting/bookmark_color");
 	Color breakpoint_color = EDITOR_GET("text_editor/highlighting/breakpoint_color");
@@ -220,13 +183,6 @@ void ScriptTextEditor::_load_theme_settings() {
 	Color code_folding_color = EDITOR_GET("text_editor/highlighting/code_folding_color");
 	Color search_result_color = EDITOR_GET("text_editor/highlighting/search_result_color");
 	Color search_result_border_color = EDITOR_GET("text_editor/highlighting/search_result_border_color");
-	Color symbol_color = EDITOR_GET("text_editor/highlighting/symbol_color");
-	Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
-	Color basetype_color = EDITOR_GET("text_editor/highlighting/base_type_color");
-	Color type_color = EDITOR_GET("text_editor/highlighting/engine_type_color");
-	Color usertype_color = EDITOR_GET("text_editor/highlighting/user_type_color");
-	Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
-	Color string_color = EDITOR_GET("text_editor/highlighting/string_color");
 
 	text_edit->add_theme_color_override("background_color", background_color);
 	text_edit->add_theme_color_override("completion_background_color", completion_background_color);
@@ -245,9 +201,6 @@ void ScriptTextEditor::_load_theme_settings() {
 	text_edit->add_theme_color_override("current_line_color", current_line_color);
 	text_edit->add_theme_color_override("line_length_guideline_color", line_length_guideline_color);
 	text_edit->add_theme_color_override("word_highlighted_color", word_highlighted_color);
-	text_edit->add_theme_color_override("number_color", number_color);
-	text_edit->add_theme_color_override("function_color", function_color);
-	text_edit->add_theme_color_override("member_variable_color", member_variable_color);
 	text_edit->add_theme_color_override("bookmark_color", bookmark_color);
 	text_edit->add_theme_color_override("breakpoint_color", breakpoint_color);
 	text_edit->add_theme_color_override("executing_line_color", executing_line_color);
@@ -255,18 +208,9 @@ void ScriptTextEditor::_load_theme_settings() {
 	text_edit->add_theme_color_override("code_folding_color", code_folding_color);
 	text_edit->add_theme_color_override("search_result_color", search_result_color);
 	text_edit->add_theme_color_override("search_result_border_color", search_result_border_color);
-	text_edit->add_theme_color_override("symbol_color", symbol_color);
 
 	text_edit->add_theme_constant_override("line_spacing", EDITOR_DEF("text_editor/theme/line_spacing", 6));
 
-	colors_cache.symbol_color = symbol_color;
-	colors_cache.keyword_color = keyword_color;
-	colors_cache.basetype_color = basetype_color;
-	colors_cache.type_color = type_color;
-	colors_cache.usertype_color = usertype_color;
-	colors_cache.comment_color = comment_color;
-	colors_cache.string_color = string_color;
-
 	theme_loaded = true;
 	if (!script.is_null()) {
 		_set_theme_for_script();
@@ -279,98 +223,47 @@ void ScriptTextEditor::_set_theme_for_script() {
 	}
 
 	TextEdit *text_edit = code_editor->get_text_edit();
+	text_edit->get_syntax_highlighter()->update_cache();
 
-	List<String> keywords;
-	script->get_language()->get_reserved_words(&keywords);
+	/* add keywords for auto completion */
+	// singleton autoloads (as types, just as engine singletons are)
+	Map<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
+	for (Map<StringName, ProjectSettings::AutoloadInfo>::Element *E = autoloads.front(); E; E = E->next()) {
+		const ProjectSettings::AutoloadInfo &info = E->value();
+		if (info.is_singleton) {
+			text_edit->add_keyword(info.name);
+		}
+	}
 
-	for (List<String>::Element *E = keywords.front(); E; E = E->next()) {
-		text_edit->add_keyword_color(E->get(), colors_cache.keyword_color);
-	}
-
-	//colorize core types
-	const Color basetype_color = colors_cache.basetype_color;
-	text_edit->add_keyword_color("String", basetype_color);
-	text_edit->add_keyword_color("Vector2", basetype_color);
-	text_edit->add_keyword_color("Vector2i", basetype_color);
-	text_edit->add_keyword_color("Rect2", basetype_color);
-	text_edit->add_keyword_color("Rect2i", basetype_color);
-	text_edit->add_keyword_color("Vector3", basetype_color);
-	text_edit->add_keyword_color("Vector3i", basetype_color);
-	text_edit->add_keyword_color("Transform2D", basetype_color);
-	text_edit->add_keyword_color("Plane", basetype_color);
-	text_edit->add_keyword_color("Quat", basetype_color);
-	text_edit->add_keyword_color("AABB", basetype_color);
-	text_edit->add_keyword_color("Basis", basetype_color);
-	text_edit->add_keyword_color("Transform", basetype_color);
-	text_edit->add_keyword_color("Color", basetype_color);
-	text_edit->add_keyword_color("StringName", basetype_color);
-	text_edit->add_keyword_color("NodePath", basetype_color);
-	text_edit->add_keyword_color("RID", basetype_color);
-	text_edit->add_keyword_color("Object", basetype_color);
-	text_edit->add_keyword_color("Callable", basetype_color);
-	text_edit->add_keyword_color("Dictionary", basetype_color);
-	text_edit->add_keyword_color("Array", basetype_color);
-	text_edit->add_keyword_color("PackedByteArray", basetype_color);
-	text_edit->add_keyword_color("PackedInt32Array", basetype_color);
-	text_edit->add_keyword_color("PackedInt64Array", basetype_color);
-	text_edit->add_keyword_color("PackedFloat32Array", basetype_color);
-	text_edit->add_keyword_color("PackedFloat64Array", basetype_color);
-	text_edit->add_keyword_color("PackedStringArray", basetype_color);
-	text_edit->add_keyword_color("PackedVector2Array", basetype_color);
-	text_edit->add_keyword_color("PackedVector3Array", basetype_color);
-	text_edit->add_keyword_color("PackedColorArray", basetype_color);
-
-	//colorize engine types
+	// engine types
 	List<StringName> types;
 	ClassDB::get_class_list(&types);
-
 	for (List<StringName>::Element *E = types.front(); E; E = E->next()) {
 		String n = E->get();
 		if (n.begins_with("_")) {
 			n = n.substr(1, n.length());
 		}
-
-		text_edit->add_keyword_color(n, colors_cache.type_color);
+		text_edit->add_keyword(n);
 	}
-	_update_member_keywords();
 
-	//colorize user types
+	// user types
 	List<StringName> global_classes;
 	ScriptServer::get_global_class_list(&global_classes);
-
 	for (List<StringName>::Element *E = global_classes.front(); E; E = E->next()) {
-		text_edit->add_keyword_color(E->get(), colors_cache.usertype_color);
+		text_edit->add_keyword(E->get());
 	}
 
-	//colorize singleton autoloads (as types, just as engine singletons are)
-	Map<StringName, ProjectSettings::AutoloadInfo> autoloads = ProjectSettings::get_singleton()->get_autoload_list();
-	for (Map<StringName, ProjectSettings::AutoloadInfo>::Element *E = autoloads.front(); E; E = E->next()) {
-		const ProjectSettings::AutoloadInfo &info = E->value();
-		if (info.is_singleton) {
-			text_edit->add_keyword_color(info.name, colors_cache.usertype_color);
-		}
-	}
-
-	//colorize comments
-	List<String> comments;
-	script->get_language()->get_comment_delimiters(&comments);
-
-	for (List<String>::Element *E = comments.front(); E; E = E->next()) {
-		String comment = E->get();
-		String beg = comment.get_slice(" ", 0);
-		String end = comment.get_slice_count(" ") > 1 ? comment.get_slice(" ", 1) : String();
-
-		text_edit->add_color_region(beg, end, colors_cache.comment_color, end == "");
+	List<String> keywords;
+	script->get_language()->get_reserved_words(&keywords);
+	for (List<String>::Element *E = keywords.front(); E; E = E->next()) {
+		text_edit->add_keyword(E->get());
 	}
 
-	//colorize strings
-	List<String> strings;
-	script->get_language()->get_string_delimiters(&strings);
-	for (List<String>::Element *E = strings.front(); E; E = E->next()) {
-		String string = E->get();
-		String beg = string.get_slice(" ", 0);
-		String end = string.get_slice_count(" ") > 1 ? string.get_slice(" ", 1) : String();
-		text_edit->add_color_region(beg, end, colors_cache.string_color, end == "");
+	// core types
+	List<String> core_types;
+	script->get_language()->get_core_type_words(&core_types);
+	for (List<String>::Element *E = core_types.front(); E; E = E->next()) {
+		text_edit->add_keyword(E->get());
 	}
 }
 
@@ -555,7 +448,7 @@ void ScriptTextEditor::_validate_script() {
 		if (!script->is_tool()) {
 			script->set_source_code(text);
 			script->update_exports();
-			_update_member_keywords();
+			te->get_syntax_highlighter()->update_cache();
 		}
 
 		functions.clear();
@@ -1380,23 +1273,20 @@ void ScriptTextEditor::_edit_option_toggle_inline_comment() {
 	code_editor->toggle_inline_comment(delimiter);
 }
 
-void ScriptTextEditor::add_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) {
+void ScriptTextEditor::add_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) {
 	highlighters[p_highlighter->_get_name()] = p_highlighter;
 	highlighter_menu->add_radio_check_item(p_highlighter->_get_name());
 }
 
-void ScriptTextEditor::set_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) {
+void ScriptTextEditor::set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) {
 	TextEdit *te = code_editor->get_text_edit();
-	te->set_syntax_highlighting(p_highlighter);
-	if (p_highlighter.is_valid()) {
-		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(p_highlighter->_get_name()), true);
-	} else {
-		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(TTR("Standard")), true);
-	}
+	p_highlighter->_set_edited_resource(script);
+	te->set_syntax_highlighter(p_highlighter);
+	highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(p_highlighter->_get_name()), true);
 }
 
 void ScriptTextEditor::_change_syntax_highlighter(int p_idx) {
-	Map<String, Ref<SyntaxHighlighter> >::Element *el = highlighters.front();
+	Map<String, Ref<EditorSyntaxHighlighter>>::Element *el = highlighters.front();
 	while (el != nullptr) {
 		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(el->key()), false);
 		el = el->next();
@@ -1826,14 +1716,21 @@ ScriptTextEditor::ScriptTextEditor() {
 	convert_case->add_shortcut(ED_SHORTCUT("script_text_editor/capitalize", TTR("Capitalize"), KEY_MASK_SHIFT | KEY_F6), EDIT_CAPITALIZE);
 	convert_case->connect("id_pressed", callable_mp(this, &ScriptTextEditor::_edit_option));
 
-	highlighters[TTR("Standard")] = Ref<SyntaxHighlighter>();
 	highlighter_menu = memnew(PopupMenu);
 	highlighter_menu->set_name("highlighter_menu");
 	edit_menu->get_popup()->add_child(highlighter_menu);
 	edit_menu->get_popup()->add_submenu_item(TTR("Syntax Highlighter"), "highlighter_menu");
-	highlighter_menu->add_radio_check_item(TTR("Standard"));
 	highlighter_menu->connect("id_pressed", callable_mp(this, &ScriptTextEditor::_change_syntax_highlighter));
 
+	Ref<EditorPlainTextSyntaxHighlighter> plain_highlighter;
+	plain_highlighter.instance();
+	add_syntax_highlighter(plain_highlighter);
+
+	Ref<EditorStandardSyntaxHighlighter> highlighter;
+	highlighter.instance();
+	add_syntax_highlighter(highlighter);
+	set_syntax_highlighter(highlighter);
+
 	search_menu = memnew(MenuButton);
 	edit_hb->add_child(search_menu);
 	search_menu->set_text(TTR("Search"));
diff --git a/editor/plugins/script_text_editor.h b/editor/plugins/script_text_editor.h
index d9ba579102..6d7f84d746 100644
--- a/editor/plugins/script_text_editor.h
+++ b/editor/plugins/script_text_editor.h
@@ -83,18 +83,6 @@ class ScriptTextEditor : public ScriptEditorBase {
 	Vector2 color_position;
 	String color_args;
 
-	void _update_member_keywords();
-
-	struct ColorsCache {
-		Color symbol_color;
-		Color keyword_color;
-		Color basetype_color;
-		Color type_color;
-		Color usertype_color;
-		Color comment_color;
-		Color string_color;
-	} colors_cache;
-
 	bool theme_loaded;
 
 	enum {
@@ -164,7 +152,7 @@ protected:
 	void _notification(int p_what);
 	static void _bind_methods();
 
-	Map<String, Ref<SyntaxHighlighter> > highlighters;
+	Map<String, Ref<EditorSyntaxHighlighter>> highlighters;
 	void _change_syntax_highlighter(int p_idx);
 
 	void _edit_option(int p_op);
@@ -190,8 +178,8 @@ protected:
 public:
 	void _update_connected_methods();
 
-	virtual void add_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) override;
-	virtual void set_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) override;
+	virtual void add_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) override;
+	virtual void set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) override;
 	void update_toggle_scripts_button();
 
 	virtual void apply_code() override;
diff --git a/editor/plugins/shader_editor_plugin.cpp b/editor/plugins/shader_editor_plugin.cpp
index 7dd0b8a238..3867c8538a 100644
--- a/editor/plugins/shader_editor_plugin.cpp
+++ b/editor/plugins/shader_editor_plugin.cpp
@@ -83,8 +83,6 @@ void ShaderTextEditor::reload_text() {
 }
 
 void ShaderTextEditor::_load_theme_settings() {
-	get_text_edit()->clear_colors();
-
 	Color background_color = EDITOR_GET("text_editor/highlighting/background_color");
 	Color completion_background_color = EDITOR_GET("text_editor/highlighting/completion_background_color");
 	Color completion_selected_color = EDITOR_GET("text_editor/highlighting/completion_selected_color");
@@ -101,9 +99,6 @@ void ShaderTextEditor::_load_theme_settings() {
 	Color current_line_color = EDITOR_GET("text_editor/highlighting/current_line_color");
 	Color line_length_guideline_color = EDITOR_GET("text_editor/highlighting/line_length_guideline_color");
 	Color word_highlighted_color = EDITOR_GET("text_editor/highlighting/word_highlighted_color");
-	Color number_color = EDITOR_GET("text_editor/highlighting/number_color");
-	Color function_color = EDITOR_GET("text_editor/highlighting/function_color");
-	Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
 	Color mark_color = EDITOR_GET("text_editor/highlighting/mark_color");
 	Color bookmark_color = EDITOR_GET("text_editor/highlighting/bookmark_color");
 	Color breakpoint_color = EDITOR_GET("text_editor/highlighting/breakpoint_color");
@@ -111,9 +106,6 @@ void ShaderTextEditor::_load_theme_settings() {
 	Color code_folding_color = EDITOR_GET("text_editor/highlighting/code_folding_color");
 	Color search_result_color = EDITOR_GET("text_editor/highlighting/search_result_color");
 	Color search_result_border_color = EDITOR_GET("text_editor/highlighting/search_result_border_color");
-	Color symbol_color = EDITOR_GET("text_editor/highlighting/symbol_color");
-	Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
-	Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
 
 	get_text_edit()->add_theme_color_override("background_color", background_color);
 	get_text_edit()->add_theme_color_override("completion_background_color", completion_background_color);
@@ -131,9 +123,6 @@ void ShaderTextEditor::_load_theme_settings() {
 	get_text_edit()->add_theme_color_override("current_line_color", current_line_color);
 	get_text_edit()->add_theme_color_override("line_length_guideline_color", line_length_guideline_color);
 	get_text_edit()->add_theme_color_override("word_highlighted_color", word_highlighted_color);
-	get_text_edit()->add_theme_color_override("number_color", number_color);
-	get_text_edit()->add_theme_color_override("function_color", function_color);
-	get_text_edit()->add_theme_color_override("member_variable_color", member_variable_color);
 	get_text_edit()->add_theme_color_override("mark_color", mark_color);
 	get_text_edit()->add_theme_color_override("bookmark_color", bookmark_color);
 	get_text_edit()->add_theme_color_override("breakpoint_color", breakpoint_color);
@@ -141,7 +130,11 @@ void ShaderTextEditor::_load_theme_settings() {
 	get_text_edit()->add_theme_color_override("code_folding_color", code_folding_color);
 	get_text_edit()->add_theme_color_override("search_result_color", search_result_color);
 	get_text_edit()->add_theme_color_override("search_result_border_color", search_result_border_color);
-	get_text_edit()->add_theme_color_override("symbol_color", symbol_color);
+
+	syntax_highlighter->set_number_color(EDITOR_GET("text_editor/highlighting/number_color"));
+	syntax_highlighter->set_symbol_color(EDITOR_GET("text_editor/highlighting/symbol_color"));
+	syntax_highlighter->set_function_color(EDITOR_GET("text_editor/highlighting/function_color"));
+	syntax_highlighter->set_member_variable_color(EDITOR_GET("text_editor/highlighting/member_variable_color"));
 
 	List<String> keywords;
 	ShaderLanguage::get_keyword_list(&keywords);
@@ -158,13 +151,17 @@ void ShaderTextEditor::_load_theme_settings() {
 		}
 	}
 
+	const Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
+	syntax_highlighter->clear_keyword_colors();
 	for (List<String>::Element *E = keywords.front(); E; E = E->next()) {
-		get_text_edit()->add_keyword_color(E->get(), keyword_color);
+		syntax_highlighter->add_keyword_color(E->get(), keyword_color);
 	}
 
 	//colorize comments
-	get_text_edit()->add_color_region("/*", "*/", comment_color, false);
-	get_text_edit()->add_color_region("//", "", comment_color, false);
+	const Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
+	syntax_highlighter->clear_color_regions();
+	syntax_highlighter->add_color_region("/*", "*/", comment_color, false);
+	syntax_highlighter->add_color_region("//", "", comment_color, false);
 }
 
 void ShaderTextEditor::_check_shader_mode() {
@@ -236,6 +233,8 @@ void ShaderTextEditor::_bind_methods() {
 }
 
 ShaderTextEditor::ShaderTextEditor() {
+	syntax_highlighter.instance();
+	get_text_edit()->set_syntax_highlighter(syntax_highlighter);
 }
 
 /*** SCRIPT EDITOR ******/
@@ -356,7 +355,6 @@ void ShaderEditor::_editor_settings_changed() {
 	shader_editor->get_text_edit()->set_draw_tabs(EditorSettings::get_singleton()->get("text_editor/indent/draw_tabs"));
 	shader_editor->get_text_edit()->set_draw_spaces(EditorSettings::get_singleton()->get("text_editor/indent/draw_spaces"));
 	shader_editor->get_text_edit()->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/appearance/show_line_numbers"));
-	shader_editor->get_text_edit()->set_syntax_coloring(EditorSettings::get_singleton()->get("text_editor/highlighting/syntax_highlighting"));
 	shader_editor->get_text_edit()->set_highlight_all_occurrences(EditorSettings::get_singleton()->get("text_editor/highlighting/highlight_all_occurrences"));
 	shader_editor->get_text_edit()->set_highlight_current_line(EditorSettings::get_singleton()->get("text_editor/highlighting/highlight_current_line"));
 	shader_editor->get_text_edit()->cursor_set_blink_enabled(EditorSettings::get_singleton()->get("text_editor/cursor/caret_blink"));
diff --git a/editor/plugins/shader_editor_plugin.h b/editor/plugins/shader_editor_plugin.h
index 6ad3413dd7..904aed186a 100644
--- a/editor/plugins/shader_editor_plugin.h
+++ b/editor/plugins/shader_editor_plugin.h
@@ -44,6 +44,7 @@
 class ShaderTextEditor : public CodeTextEditor {
 	GDCLASS(ShaderTextEditor, CodeTextEditor);
 
+	Ref<CodeHighlighter> syntax_highlighter;
 	Ref<Shader> shader;
 
 	void _check_shader_mode();
diff --git a/editor/plugins/text_editor.cpp b/editor/plugins/text_editor.cpp
index 25c0da90ad..d602d152fe 100644
--- a/editor/plugins/text_editor.cpp
+++ b/editor/plugins/text_editor.cpp
@@ -33,35 +33,19 @@
 #include "core/os/keyboard.h"
 #include "editor/editor_node.h"
 
-void TextEditor::add_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) {
+void TextEditor::add_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) {
 	highlighters[p_highlighter->_get_name()] = p_highlighter;
 	highlighter_menu->add_radio_check_item(p_highlighter->_get_name());
 }
 
-void TextEditor::set_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) {
+void TextEditor::set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) {
 	TextEdit *te = code_editor->get_text_edit();
-	te->set_syntax_highlighting(p_highlighter);
-	if (p_highlighter.is_valid()) {
-		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(p_highlighter->_get_name()), true);
-	} else {
-		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text("Standard"), true);
-	}
-
-	// little work around. GDScript highlighter goes through text_edit for colours,
-	// so to remove all colours we need to set and unset them here.
-	if (p_highlighter == nullptr) { // standard
-		TextEdit *text_edit = code_editor->get_text_edit();
-		text_edit->add_theme_color_override("number_color", colors_cache.font_color);
-		text_edit->add_theme_color_override("function_color", colors_cache.font_color);
-		text_edit->add_theme_color_override("number_color", colors_cache.font_color);
-		text_edit->add_theme_color_override("member_variable_color", colors_cache.font_color);
-	} else {
-		_load_theme_settings();
-	}
+	te->set_syntax_highlighter(p_highlighter);
+	highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(p_highlighter->_get_name()), true);
 }
 
 void TextEditor::_change_syntax_highlighter(int p_idx) {
-	Map<String, Ref<SyntaxHighlighter> >::Element *el = highlighters.front();
+	Map<String, Ref<EditorSyntaxHighlighter>>::Element *el = highlighters.front();
 	while (el != nullptr) {
 		highlighter_menu->set_item_checked(highlighter_menu->get_item_idx_from_text(el->key()), false);
 		el = el->next();
@@ -71,7 +55,7 @@ void TextEditor::_change_syntax_highlighter(int p_idx) {
 
 void TextEditor::_load_theme_settings() {
 	TextEdit *text_edit = code_editor->get_text_edit();
-	text_edit->clear_colors();
+	text_edit->get_syntax_highlighter()->update_cache();
 
 	Color background_color = EDITOR_GET("text_editor/highlighting/background_color");
 	Color completion_background_color = EDITOR_GET("text_editor/highlighting/completion_background_color");
@@ -89,9 +73,6 @@ void TextEditor::_load_theme_settings() {
 	Color current_line_color = EDITOR_GET("text_editor/highlighting/current_line_color");
 	Color line_length_guideline_color = EDITOR_GET("text_editor/highlighting/line_length_guideline_color");
 	Color word_highlighted_color = EDITOR_GET("text_editor/highlighting/word_highlighted_color");
-	Color number_color = EDITOR_GET("text_editor/highlighting/number_color");
-	Color function_color = EDITOR_GET("text_editor/highlighting/function_color");
-	Color member_variable_color = EDITOR_GET("text_editor/highlighting/member_variable_color");
 	Color mark_color = EDITOR_GET("text_editor/highlighting/mark_color");
 	Color bookmark_color = EDITOR_GET("text_editor/highlighting/bookmark_color");
 	Color breakpoint_color = EDITOR_GET("text_editor/highlighting/breakpoint_color");
@@ -99,12 +80,6 @@ void TextEditor::_load_theme_settings() {
 	Color code_folding_color = EDITOR_GET("text_editor/highlighting/code_folding_color");
 	Color search_result_color = EDITOR_GET("text_editor/highlighting/search_result_color");
 	Color search_result_border_color = EDITOR_GET("text_editor/highlighting/search_result_border_color");
-	Color symbol_color = EDITOR_GET("text_editor/highlighting/symbol_color");
-	Color keyword_color = EDITOR_GET("text_editor/highlighting/keyword_color");
-	Color basetype_color = EDITOR_GET("text_editor/highlighting/base_type_color");
-	Color type_color = EDITOR_GET("text_editor/highlighting/engine_type_color");
-	Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
-	Color string_color = EDITOR_GET("text_editor/highlighting/string_color");
 
 	text_edit->add_theme_color_override("background_color", background_color);
 	text_edit->add_theme_color_override("completion_background_color", completion_background_color);
@@ -122,9 +97,6 @@ void TextEditor::_load_theme_settings() {
 	text_edit->add_theme_color_override("current_line_color", current_line_color);
 	text_edit->add_theme_color_override("line_length_guideline_color", line_length_guideline_color);
 	text_edit->add_theme_color_override("word_highlighted_color", word_highlighted_color);
-	text_edit->add_theme_color_override("number_color", number_color);
-	text_edit->add_theme_color_override("function_color", function_color);
-	text_edit->add_theme_color_override("member_variable_color", member_variable_color);
 	text_edit->add_theme_color_override("breakpoint_color", breakpoint_color);
 	text_edit->add_theme_color_override("executing_line_color", executing_line_color);
 	text_edit->add_theme_color_override("mark_color", mark_color);
@@ -132,17 +104,8 @@ void TextEditor::_load_theme_settings() {
 	text_edit->add_theme_color_override("code_folding_color", code_folding_color);
 	text_edit->add_theme_color_override("search_result_color", search_result_color);
 	text_edit->add_theme_color_override("search_result_border_color", search_result_border_color);
-	text_edit->add_theme_color_override("symbol_color", symbol_color);
 
 	text_edit->add_theme_constant_override("line_spacing", EDITOR_DEF("text_editor/theme/line_spacing", 6));
-
-	colors_cache.font_color = text_color;
-	colors_cache.symbol_color = symbol_color;
-	colors_cache.keyword_color = keyword_color;
-	colors_cache.basetype_color = basetype_color;
-	colors_cache.type_color = type_color;
-	colors_cache.comment_color = comment_color;
-	colors_cache.string_color = string_color;
 }
 
 String TextEditor::get_name() {
@@ -635,14 +598,21 @@ TextEditor::TextEditor() {
 	convert_case->add_shortcut(ED_SHORTCUT("script_text_editor/capitalize", TTR("Capitalize")), EDIT_CAPITALIZE);
 	convert_case->connect("id_pressed", callable_mp(this, &TextEditor::_edit_option));
 
-	highlighters["Standard"] = Ref<SyntaxHighlighter>();
 	highlighter_menu = memnew(PopupMenu);
 	highlighter_menu->set_name("highlighter_menu");
 	edit_menu->get_popup()->add_child(highlighter_menu);
 	edit_menu->get_popup()->add_submenu_item(TTR("Syntax Highlighter"), "highlighter_menu");
-	highlighter_menu->add_radio_check_item(TTR("Standard"));
 	highlighter_menu->connect("id_pressed", callable_mp(this, &TextEditor::_change_syntax_highlighter));
 
+	Ref<EditorPlainTextSyntaxHighlighter> plain_highlighter;
+	plain_highlighter.instance();
+	add_syntax_highlighter(plain_highlighter);
+
+	Ref<EditorStandardSyntaxHighlighter> highlighter;
+	highlighter.instance();
+	add_syntax_highlighter(highlighter);
+	set_syntax_highlighter(plain_highlighter);
+
 	MenuButton *goto_menu = memnew(MenuButton);
 	edit_hb->add_child(goto_menu);
 	goto_menu->set_text(TTR("Go To"));
diff --git a/editor/plugins/text_editor.h b/editor/plugins/text_editor.h
index 0db8f70a85..5299776b56 100644
--- a/editor/plugins/text_editor.h
+++ b/editor/plugins/text_editor.h
@@ -50,16 +50,6 @@ private:
 
 	GotoLineDialog *goto_line_dialog;
 
-	struct ColorsCache {
-		Color font_color;
-		Color symbol_color;
-		Color keyword_color;
-		Color basetype_color;
-		Color type_color;
-		Color comment_color;
-		Color string_color;
-	} colors_cache;
-
 	enum {
 		EDIT_UNDO,
 		EDIT_REDO,
@@ -104,7 +94,7 @@ protected:
 	void _make_context_menu(bool p_selection, bool p_can_fold, bool p_is_folded, Vector2 p_position);
 	void _text_edit_gui_input(const Ref<InputEvent> &ev);
 
-	Map<String, Ref<SyntaxHighlighter> > highlighters;
+	Map<String, Ref<EditorSyntaxHighlighter>> highlighters;
 	void _change_syntax_highlighter(int p_idx);
 	void _load_theme_settings();
 
@@ -116,8 +106,8 @@ protected:
 	void _bookmark_item_pressed(int p_idx);
 
 public:
-	virtual void add_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) override;
-	virtual void set_syntax_highlighter(Ref<SyntaxHighlighter> p_highlighter) override;
+	virtual void add_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) override;
+	virtual void set_syntax_highlighter(Ref<EditorSyntaxHighlighter> p_highlighter) override;
 
 	virtual String get_name() override;
 	virtual Ref<Texture2D> get_theme_icon() override;
diff --git a/editor/plugins/visual_shader_editor_plugin.cpp b/editor/plugins/visual_shader_editor_plugin.cpp
index c19140ae7c..ea6c5edcef 100644
--- a/editor/plugins/visual_shader_editor_plugin.cpp
+++ b/editor/plugins/visual_shader_editor_plugin.cpp
@@ -824,6 +824,8 @@ void VisualShaderEditor::_update_graph() {
 
 		if (is_expression) {
 			TextEdit *expression_box = memnew(TextEdit);
+			Ref<CodeHighlighter> expression_syntax_highlighter;
+			expression_syntax_highlighter.instance();
 			expression_node->set_control(expression_box, 0);
 			node->add_child(expression_box);
 
@@ -833,18 +835,18 @@ void VisualShaderEditor::_update_graph() {
 			Color comment_color = EDITOR_GET("text_editor/highlighting/comment_color");
 			Color symbol_color = EDITOR_GET("text_editor/highlighting/symbol_color");
 
-			expression_box->set_syntax_coloring(true);
+			expression_box->set_syntax_highlighter(expression_syntax_highlighter);
 			expression_box->add_theme_color_override("background_color", background_color);
 
 			for (List<String>::Element *E = keyword_list.front(); E; E = E->next()) {
-				expression_box->add_keyword_color(E->get(), keyword_color);
+				expression_syntax_highlighter->add_keyword_color(E->get(), keyword_color);
 			}
 
 			expression_box->add_theme_font_override("font", get_theme_font("expression", "EditorFonts"));
 			expression_box->add_theme_color_override("font_color", text_color);
-			expression_box->add_theme_color_override("symbol_color", symbol_color);
-			expression_box->add_color_region("/*", "*/", comment_color, false);
-			expression_box->add_color_region("//", "", comment_color, false);
+			expression_syntax_highlighter->set_symbol_color(symbol_color);
+			expression_syntax_highlighter->add_color_region("/*", "*/", comment_color, false);
+			expression_syntax_highlighter->add_color_region("//", "", comment_color, false);
 
 			expression_box->set_text(expression);
 			expression_box->set_context_menu_enabled(false);
@@ -1703,14 +1705,14 @@ void VisualShaderEditor::_notification(int p_what) {
 			preview_text->add_theme_color_override("background_color", background_color);
 
 			for (List<String>::Element *E = keyword_list.front(); E; E = E->next()) {
-				preview_text->add_keyword_color(E->get(), keyword_color);
+				syntax_highlighter->add_keyword_color(E->get(), keyword_color);
 			}
 
 			preview_text->add_theme_font_override("font", get_theme_font("expression", "EditorFonts"));
 			preview_text->add_theme_color_override("font_color", text_color);
-			preview_text->add_theme_color_override("symbol_color", symbol_color);
-			preview_text->add_color_region("/*", "*/", comment_color, false);
-			preview_text->add_color_region("//", "", comment_color, false);
+			syntax_highlighter->set_symbol_color(symbol_color);
+			syntax_highlighter->add_color_region("/*", "*/", comment_color, false);
+			syntax_highlighter->add_color_region("//", "", comment_color, false);
 
 			error_text->add_theme_font_override("font", get_theme_font("status_source", "EditorFonts"));
 			error_text->add_theme_color_override("font_color", get_theme_color("error_color", "Editor"));
@@ -2369,11 +2371,12 @@ VisualShaderEditor::VisualShaderEditor() {
 	preview_vbox->set_visible(preview_showed);
 	main_box->add_child(preview_vbox);
 	preview_text = memnew(TextEdit);
+	syntax_highlighter.instance();
 	preview_vbox->add_child(preview_text);
 	preview_text->set_h_size_flags(SIZE_EXPAND_FILL);
 	preview_text->set_v_size_flags(SIZE_EXPAND_FILL);
 	preview_text->set_custom_minimum_size(Size2(400 * EDSCALE, 0));
-	preview_text->set_syntax_coloring(true);
+	preview_text->set_syntax_highlighter(syntax_highlighter);
 	preview_text->set_show_line_numbers(true);
 	preview_text->set_readonly(true);
 
diff --git a/editor/plugins/visual_shader_editor_plugin.h b/editor/plugins/visual_shader_editor_plugin.h
index dd9144c567..0601b35131 100644
--- a/editor/plugins/visual_shader_editor_plugin.h
+++ b/editor/plugins/visual_shader_editor_plugin.h
@@ -72,6 +72,7 @@ class VisualShaderEditor : public VBoxContainer {
 	bool shader_error;
 	VBoxContainer *preview_vbox;
 	TextEdit *preview_text;
+	Ref<CodeHighlighter> syntax_highlighter;
 	Label *error_text;
 
 	UndoRedo *undo_redo;