Add custom background line colour to TextEdit and remove marked lines

doc/classes/CodeEdit.xml

@@ -193,8 +193,6 @@
 		</theme_item>
 		<theme_item name="line_spacing" type="int" default="4">
 		</theme_item>
-		<theme_item name="mark_color" type="Color" default="Color( 1, 0.4, 0.4, 0.4 )">
-		</theme_item>
 		<theme_item name="normal" type="StyleBox">
 		</theme_item>
 		<theme_item name="outline_size" type="int" default="0">

doc/classes/TextEdit.xml

@@ -167,6 +167,15 @@
 				Returns the text of a specific line.
 			</description>
 		</method>
+		<method name="get_line_background_color">
+			<return type="Color">
+			</return>
+			<argument index="0" name="line" type="int">
+			</argument>
+			<description>
+				Returns the current background color of the line. [code]Color(0, 0, 0, 0)[/code] is returned if no color is set.
+			</description>
+		</method>
 		<method name="get_line_count" qualifiers="const">
 			<return type="int">
 			</return>
@@ -548,6 +557,17 @@
 				If [code]true[/code], hides the line of the specified index.
 			</description>
 		</method>
+		<method name="set_line_background_color">
+			<return type="void">
+			</return>
+			<argument index="0" name="line" type="int">
+			</argument>
+			<argument index="1" name="color" type="Color">
+			</argument>
+			<description>
+				Sets the current background color of the line. Set to [code]Color(0, 0, 0, 0)[/code] for no color.
+			</description>
+		</method>
 		<method name="set_line_gutter_clickable">
 			<return type="void">
 			</return>
@@ -987,9 +1007,6 @@
 		<theme_item name="line_spacing" type="int" default="4">
 			Sets the spacing between the lines.
 		</theme_item>
-		<theme_item name="mark_color" type="Color" default="Color( 1, 0.4, 0.4, 0.4 )">
-			Sets the [Color] of marked text.
-		</theme_item>
 		<theme_item name="normal" type="StyleBox">
 			Sets the [StyleBox] of this [TextEdit].
 		</theme_item>

editor/code_editor.cpp

@@ -1474,6 +1474,34 @@ void CodeTextEditor::goto_error() {
 	}
 }
 
+void CodeTextEditor::_update_text_editor_theme() {
+	text_editor->add_theme_color_override("background_color", EDITOR_GET("text_editor/highlighting/background_color"));
+	text_editor->add_theme_color_override("completion_background_color", EDITOR_GET("text_editor/highlighting/completion_background_color"));
+	text_editor->add_theme_color_override("completion_selected_color", EDITOR_GET("text_editor/highlighting/completion_selected_color"));
+	text_editor->add_theme_color_override("completion_existing_color", EDITOR_GET("text_editor/highlighting/completion_existing_color"));
+	text_editor->add_theme_color_override("completion_scroll_color", EDITOR_GET("text_editor/highlighting/completion_scroll_color"));
+	text_editor->add_theme_color_override("completion_font_color", EDITOR_GET("text_editor/highlighting/completion_font_color"));
+	text_editor->add_theme_color_override("font_color", EDITOR_GET("text_editor/highlighting/text_color"));
+	text_editor->add_theme_color_override("line_number_color", EDITOR_GET("text_editor/highlighting/line_number_color"));
+	text_editor->add_theme_color_override("caret_color", EDITOR_GET("text_editor/highlighting/caret_color"));
+	text_editor->add_theme_color_override("caret_background_color", EDITOR_GET("text_editor/highlighting/caret_background_color"));
+	text_editor->add_theme_color_override("font_selected_color", EDITOR_GET("text_editor/highlighting/text_selected_color"));
+	text_editor->add_theme_color_override("selection_color", EDITOR_GET("text_editor/highlighting/selection_color"));
+	text_editor->add_theme_color_override("brace_mismatch_color", EDITOR_GET("text_editor/highlighting/brace_mismatch_color"));
+	text_editor->add_theme_color_override("current_line_color", EDITOR_GET("text_editor/highlighting/current_line_color"));
+	text_editor->add_theme_color_override("line_length_guideline_color", EDITOR_GET("text_editor/highlighting/line_length_guideline_color"));
+	text_editor->add_theme_color_override("word_highlighted_color", EDITOR_GET("text_editor/highlighting/word_highlighted_color"));
+	text_editor->add_theme_color_override("bookmark_color", EDITOR_GET("text_editor/highlighting/bookmark_color"));
+	text_editor->add_theme_color_override("breakpoint_color", EDITOR_GET("text_editor/highlighting/breakpoint_color"));
+	text_editor->add_theme_color_override("executing_line_color", EDITOR_GET("text_editor/highlighting/executing_line_color"));
+	text_editor->add_theme_color_override("code_folding_color", EDITOR_GET("text_editor/highlighting/code_folding_color"));
+	text_editor->add_theme_color_override("search_result_color", EDITOR_GET("text_editor/highlighting/search_result_color"));
+	text_editor->add_theme_color_override("search_result_border_color", EDITOR_GET("text_editor/highlighting/search_result_border_color"));
+	text_editor->add_theme_constant_override("line_spacing", EDITOR_DEF("text_editor/theme/line_spacing", 6));
+	emit_signal("load_theme_settings");
+	_load_theme_settings();
+}
+
 void CodeTextEditor::_update_font() {
 	text_editor->add_theme_font_override("font", get_theme_font("source", "EditorFonts"));
 	text_editor->add_theme_font_size_override("font_size", get_theme_font_size("source_size", "EditorFonts"));
@@ -1497,6 +1525,7 @@ void CodeTextEditor::_update_font() {
 }
 
 void CodeTextEditor::_on_settings_change() {
+	_update_text_editor_theme();
 	_update_font();
 
 	font_size = EditorSettings::get_singleton()->get("interface/editor/code_font_size");
@@ -1583,14 +1612,11 @@ void CodeTextEditor::_error_pressed(const Ref<InputEvent> &p_event) {
 
 void CodeTextEditor::_notification(int p_what) {
 	switch (p_what) {
-		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
-			_load_theme_settings();
-			emit_signal("load_theme_settings");
-		} break;
 		case NOTIFICATION_THEME_CHANGED: {
 			if (toggle_scripts_button->is_visible()) {
 				update_toggle_scripts_button();
 			}
+			_update_text_editor_theme();
 			_update_font();
 		} break;
 		case NOTIFICATION_ENTER_TREE: {

editor/code_editor.h

@@ -161,6 +161,7 @@ class CodeTextEditor : public VBoxContainer {
 
 	void _on_settings_change();
 
+	void _update_text_editor_theme();
 	void _update_font();
 	void _complete_request();
 	Ref<Texture2D> _get_completion_icon(const ScriptCodeCompletionOption &p_option);

editor/plugins/script_text_editor.cpp

@@ -170,66 +170,25 @@ void ScriptTextEditor::_load_theme_settings() {
 	CodeEdit *text_edit = code_editor->get_text_editor();
 	text_edit->clear_keywords();
 
+	Color updated_marked_line_color = EDITOR_GET("text_editor/highlighting/mark_color");
 	Color updated_safe_line_number_color = EDITOR_GET("text_editor/highlighting/safe_line_number_color");
-	if (updated_safe_line_number_color != safe_line_number_color) {
+
+	bool safe_line_number_color_updated = updated_safe_line_number_color != safe_line_number_color;
+	bool marked_line_color_updated = updated_marked_line_color != marked_line_color;
+	if (safe_line_number_color_updated || marked_line_color_updated) {
 		safe_line_number_color = updated_safe_line_number_color;
 		for (int i = 0; i < text_edit->get_line_count(); i++) {
-			if (text_edit->get_line_gutter_item_color(i, line_number_gutter) != default_line_number_color) {
+			if (marked_line_color_updated && text_edit->get_line_background_color(i) == marked_line_color) {
+				text_edit->set_line_background_color(i, updated_marked_line_color);
+			}
+
+			if (safe_line_number_color_updated && text_edit->get_line_gutter_item_color(i, line_number_gutter) != default_line_number_color) {
 				text_edit->set_line_gutter_item_color(i, line_number_gutter, safe_line_number_color);
 			}
 		}
+		marked_line_color = updated_marked_line_color;
 	}
 
-	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");
-	Color completion_existing_color = EDITOR_GET("text_editor/highlighting/completion_existing_color");
-	Color completion_scroll_color = EDITOR_GET("text_editor/highlighting/completion_scroll_color");
-	Color completion_font_color = EDITOR_GET("text_editor/highlighting/completion_font_color");
-	Color text_color = EDITOR_GET("text_editor/highlighting/text_color");
-	Color line_number_color = EDITOR_GET("text_editor/highlighting/line_number_color");
-	Color caret_color = EDITOR_GET("text_editor/highlighting/caret_color");
-	Color caret_background_color = EDITOR_GET("text_editor/highlighting/caret_background_color");
-	Color text_selected_color = EDITOR_GET("text_editor/highlighting/text_selected_color");
-	Color selection_color = EDITOR_GET("text_editor/highlighting/selection_color");
-	Color brace_mismatch_color = EDITOR_GET("text_editor/highlighting/brace_mismatch_color");
-	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 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");
-	Color executing_line_color = EDITOR_GET("text_editor/highlighting/executing_line_color");
-	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");
-
-	text_edit->add_theme_color_override("background_color", background_color);
-	text_edit->add_theme_color_override("completion_background_color", completion_background_color);
-	text_edit->add_theme_color_override("completion_selected_color", completion_selected_color);
-	text_edit->add_theme_color_override("completion_existing_color", completion_existing_color);
-	text_edit->add_theme_color_override("completion_scroll_color", completion_scroll_color);
-	text_edit->add_theme_color_override("completion_font_color", completion_font_color);
-	text_edit->add_theme_color_override("font_color", text_color);
-	text_edit->add_theme_color_override("line_number_color", line_number_color);
-	text_edit->add_theme_color_override("caret_color", caret_color);
-	text_edit->add_theme_color_override("caret_background_color", caret_background_color);
-	text_edit->add_theme_color_override("font_selected_color", text_selected_color);
-	text_edit->add_theme_color_override("selection_color", selection_color);
-	text_edit->add_theme_color_override("brace_mismatch_color", brace_mismatch_color);
-	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("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);
-	text_edit->add_theme_color_override("mark_color", mark_color);
-	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_constant_override("line_spacing", EDITOR_DEF("text_editor/theme/line_spacing", 6));
-
 	theme_loaded = true;
 	if (!script.is_null()) {
 		_set_theme_for_script();
@@ -546,7 +505,7 @@ void ScriptTextEditor::_validate_script() {
 	bool highlight_safe = EDITOR_DEF("text_editor/highlighting/highlight_type_safe_lines", true);
 	bool last_is_safe = false;
 	for (int i = 0; i < te->get_line_count(); i++) {
-		te->set_line_as_marked(i, line == i);
+		te->set_line_background_color(i, (line == i) ? marked_line_color : Color(0, 0, 0, 0));
 		if (highlight_safe) {
 			if (safe_lines.has(i + 1)) {
 				te->set_line_gutter_item_color(i, line_number_gutter, safe_line_number_color);

editor/plugins/script_text_editor.h

@@ -89,6 +89,8 @@ class ScriptTextEditor : public ScriptEditorBase {
 	Color default_line_number_color = Color(1, 1, 1);
 	Color safe_line_number_color = Color(1, 1, 1);
 
+	Color marked_line_color = Color(1, 1, 1);
+
 	PopupPanel *color_panel = nullptr;
 	ColorPicker *color_picker = nullptr;
 	Vector2 color_position;

editor/plugins/shader_editor_plugin.cpp

@@ -83,53 +83,16 @@ void ShaderTextEditor::reload_text() {
 }
 
 void ShaderTextEditor::_load_theme_settings() {
-	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");
-	Color completion_existing_color = EDITOR_GET("text_editor/highlighting/completion_existing_color");
-	Color completion_scroll_color = EDITOR_GET("text_editor/highlighting/completion_scroll_color");
-	Color completion_font_color = EDITOR_GET("text_editor/highlighting/completion_font_color");
-	Color text_color = EDITOR_GET("text_editor/highlighting/text_color");
-	Color line_number_color = EDITOR_GET("text_editor/highlighting/line_number_color");
-	Color caret_color = EDITOR_GET("text_editor/highlighting/caret_color");
-	Color caret_background_color = EDITOR_GET("text_editor/highlighting/caret_background_color");
-	Color text_selected_color = EDITOR_GET("text_editor/highlighting/text_selected_color");
-	Color selection_color = EDITOR_GET("text_editor/highlighting/selection_color");
-	Color brace_mismatch_color = EDITOR_GET("text_editor/highlighting/brace_mismatch_color");
-	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 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");
-	Color executing_line_color = EDITOR_GET("text_editor/highlighting/executing_line_color");
-	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");
-
-	get_text_editor()->add_theme_color_override("background_color", background_color);
-	get_text_editor()->add_theme_color_override("completion_background_color", completion_background_color);
-	get_text_editor()->add_theme_color_override("completion_selected_color", completion_selected_color);
-	get_text_editor()->add_theme_color_override("completion_existing_color", completion_existing_color);
-	get_text_editor()->add_theme_color_override("completion_scroll_color", completion_scroll_color);
-	get_text_editor()->add_theme_color_override("completion_font_color", completion_font_color);
-	get_text_editor()->add_theme_color_override("font_color", text_color);
-	get_text_editor()->add_theme_color_override("line_number_color", line_number_color);
-	get_text_editor()->add_theme_color_override("caret_color", caret_color);
-	get_text_editor()->add_theme_color_override("caret_background_color", caret_background_color);
-	get_text_editor()->add_theme_color_override("font_selected_color", text_selected_color);
-	get_text_editor()->add_theme_color_override("selection_color", selection_color);
-	get_text_editor()->add_theme_color_override("brace_mismatch_color", brace_mismatch_color);
-	get_text_editor()->add_theme_color_override("current_line_color", current_line_color);
-	get_text_editor()->add_theme_color_override("line_length_guideline_color", line_length_guideline_color);
-	get_text_editor()->add_theme_color_override("word_highlighted_color", word_highlighted_color);
-	get_text_editor()->add_theme_color_override("mark_color", mark_color);
-	get_text_editor()->add_theme_color_override("bookmark_color", bookmark_color);
-	get_text_editor()->add_theme_color_override("breakpoint_color", breakpoint_color);
-	get_text_editor()->add_theme_color_override("executing_line_color", executing_line_color);
-	get_text_editor()->add_theme_color_override("code_folding_color", code_folding_color);
-	get_text_editor()->add_theme_color_override("search_result_color", search_result_color);
-	get_text_editor()->add_theme_color_override("search_result_border_color", search_result_border_color);
+	CodeEdit *text_editor = get_text_editor();
+	Color updated_marked_line_color = EDITOR_GET("text_editor/highlighting/mark_color");
+	if (updated_marked_line_color != marked_line_color) {
+		for (int i = 0; i < text_editor->get_line_count(); i++) {
+			if (text_editor->get_line_background_color(i) == marked_line_color) {
+				text_editor->set_line_background_color(i, updated_marked_line_color);
+			}
+		}
+		marked_line_color = updated_marked_line_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"));
@@ -231,13 +194,13 @@ void ShaderTextEditor::_validate_script() {
 		set_error(error_text);
 		set_error_pos(sl.get_error_line() - 1, 0);
 		for (int i = 0; i < get_text_editor()->get_line_count(); i++) {
-			get_text_editor()->set_line_as_marked(i, false);
+			get_text_editor()->set_line_background_color(i, Color(0, 0, 0, 0));
 		}
-		get_text_editor()->set_line_as_marked(sl.get_error_line() - 1, true);
+		get_text_editor()->set_line_background_color(sl.get_error_line() - 1, marked_line_color);
 
 	} else {
 		for (int i = 0; i < get_text_editor()->get_line_count(); i++) {
-			get_text_editor()->set_line_as_marked(i, false);
+			get_text_editor()->set_line_background_color(i, Color(0, 0, 0, 0));
 		}
 		set_error("");
 	}

editor/plugins/shader_editor_plugin.h

@@ -44,6 +44,8 @@
 class ShaderTextEditor : public CodeTextEditor {
 	GDCLASS(ShaderTextEditor, CodeTextEditor);
 
+	Color marked_line_color = Color(1, 1, 1);
+
 	Ref<CodeHighlighter> syntax_highlighter;
 	Ref<Shader> shader;
 

editor/plugins/text_editor.cpp

@@ -59,58 +59,7 @@ void TextEditor::_change_syntax_highlighter(int p_idx) {
 }
 
 void TextEditor::_load_theme_settings() {
-	CodeEdit *text_edit = code_editor->get_text_editor();
-	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");
-	Color completion_selected_color = EDITOR_GET("text_editor/highlighting/completion_selected_color");
-	Color completion_existing_color = EDITOR_GET("text_editor/highlighting/completion_existing_color");
-	Color completion_scroll_color = EDITOR_GET("text_editor/highlighting/completion_scroll_color");
-	Color completion_font_color = EDITOR_GET("text_editor/highlighting/completion_font_color");
-	Color text_color = EDITOR_GET("text_editor/highlighting/text_color");
-	Color line_number_color = EDITOR_GET("text_editor/highlighting/line_number_color");
-	Color caret_color = EDITOR_GET("text_editor/highlighting/caret_color");
-	Color caret_background_color = EDITOR_GET("text_editor/highlighting/caret_background_color");
-	Color text_selected_color = EDITOR_GET("text_editor/highlighting/text_selected_color");
-	Color selection_color = EDITOR_GET("text_editor/highlighting/selection_color");
-	Color brace_mismatch_color = EDITOR_GET("text_editor/highlighting/brace_mismatch_color");
-	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 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");
-	Color executing_line_color = EDITOR_GET("text_editor/highlighting/executing_line_color");
-	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");
-
-	text_edit->add_theme_color_override("background_color", background_color);
-	text_edit->add_theme_color_override("completion_background_color", completion_background_color);
-	text_edit->add_theme_color_override("completion_selected_color", completion_selected_color);
-	text_edit->add_theme_color_override("completion_existing_color", completion_existing_color);
-	text_edit->add_theme_color_override("completion_scroll_color", completion_scroll_color);
-	text_edit->add_theme_color_override("completion_font_color", completion_font_color);
-	text_edit->add_theme_color_override("font_color", text_color);
-	text_edit->add_theme_color_override("line_number_color", line_number_color);
-	text_edit->add_theme_color_override("caret_color", caret_color);
-	text_edit->add_theme_color_override("caret_background_color", caret_background_color);
-	text_edit->add_theme_color_override("font_selected_color", text_selected_color);
-	text_edit->add_theme_color_override("selection_color", selection_color);
-	text_edit->add_theme_color_override("brace_mismatch_color", brace_mismatch_color);
-	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("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);
-	text_edit->add_theme_color_override("bookmark_color", bookmark_color);
-	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_constant_override("line_spacing", EDITOR_DEF("text_editor/theme/line_spacing", 6));
+	code_editor->get_text_editor()->get_syntax_highlighter()->update_cache();
 }
 
 String TextEditor::get_name() {

editor/plugins/visual_shader_editor_plugin.cpp

@@ -3429,10 +3429,11 @@ void VisualShaderEditor::_update_preview() {
 	Error err = sl.compile(code, ShaderTypes::get_singleton()->get_functions(RenderingServer::ShaderMode(visual_shader->get_mode())), ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(visual_shader->get_mode())), ShaderLanguage::VaryingFunctionNames(), ShaderTypes::get_singleton()->get_types(), _get_global_variable_type);
 
 	for (int i = 0; i < preview_text->get_line_count(); i++) {
-		preview_text->set_line_as_marked(i, false);
+		preview_text->set_line_background_color(i, Color(0, 0, 0, 0));
 	}
 	if (err != OK) {
-		preview_text->set_line_as_marked(sl.get_error_line() - 1, true);
+		Color error_line_color = EDITOR_GET("text_editor/highlighting/mark_color");
+		preview_text->set_line_background_color(sl.get_error_line() - 1, error_line_color);
 		error_text->set_visible(true);
 
 		String text = "error(" + itos(sl.get_error_line()) + "): " + sl.get_error_text();

scene/gui/text_edit.cpp

@@ -253,7 +253,6 @@ void TextEdit::Text::set(int p_line, const String &p_text, const Vector<Vector2i
 void TextEdit::Text::insert(int p_at, const String &p_text, const Vector<Vector2i> &p_bidi_override) {
 	Line line;
 	line.gutters.resize(gutter_count);
-	line.marked = false;
 	line.hidden = false;
 	line.data = p_text;
 	line.bidi_override = p_bidi_override;
@@ -867,6 +866,8 @@ void TextEdit::_notification(int p_what) {
 
 					Dictionary color_map = _get_line_syntax_highlighting(minimap_line);
 
+					Color line_background_color = text.get_line_background_color(minimap_line);
+					line_background_color.a *= 0.6;
 					Color current_color = cache.font_color;
 					if (readonly) {
 						current_color = cache.font_readonly_color;
@@ -901,6 +902,12 @@ void TextEdit::_notification(int p_what) {
 							} else {
 								RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2((xmargin_end + 2), i * 3, cache.minimap_width, 2), cache.current_line_color);
 							}
+						} else if (line_background_color != Color(0, 0, 0, 0)) {
+							if (rtl) {
+								RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(size.width - (xmargin_end + 2) - cache.minimap_width, i * 3, cache.minimap_width, 2), line_background_color);
+							} else {
+								RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2((xmargin_end + 2), i * 3, cache.minimap_width, 2), line_background_color);
+							}
 						}
 
 						Color previous_color;
@@ -1048,11 +1055,11 @@ void TextEdit::_notification(int p_what) {
 						break;
 					}
 
-					if (text.is_marked(line)) {
+					if (text.get_line_background_color(line) != Color(0, 0, 0, 0)) {
 						if (rtl) {
-							RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(size.width - ofs_x - xmargin_end, ofs_y, xmargin_end - xmargin_beg, row_height), cache.mark_color);
+							RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(size.width - ofs_x - xmargin_end, ofs_y, xmargin_end - xmargin_beg, row_height), text.get_line_background_color(line));
 						} else {
-							RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(xmargin_beg + ofs_x, ofs_y, xmargin_end - xmargin_beg, row_height), cache.mark_color);
+							RenderingServer::get_singleton()->canvas_item_add_rect(ci, Rect2(xmargin_beg + ofs_x, ofs_y, xmargin_end - xmargin_beg, row_height), text.get_line_background_color(line));
 						}
 					}
 
@@ -4789,7 +4796,6 @@ void TextEdit::_update_caches() {
 	cache.font_selected_color = get_theme_color("font_selected_color");
 	cache.font_readonly_color = get_theme_color("font_readonly_color");
 	cache.selection_color = get_theme_color("selection_color");
-	cache.mark_color = get_theme_color("mark_color");
 	cache.current_line_color = get_theme_color("current_line_color");
 	cache.line_length_guideline_color = get_theme_color("line_length_guideline_color");
 	cache.code_folding_color = get_theme_color("code_folding_color");
@@ -5019,6 +5025,18 @@ bool TextEdit::is_line_gutter_clickable(int p_line, int p_gutter) const {
 	return text.is_line_gutter_clickable(p_line, p_gutter);
 }
 
+// Line style
+void TextEdit::set_line_background_color(int p_line, const Color &p_color) {
+	ERR_FAIL_INDEX(p_line, text.size());
+	text.set_line_background_color(p_line, p_color);
+	update();
+}
+
+Color TextEdit::get_line_background_color(int p_line) {
+	ERR_FAIL_INDEX_V(p_line, text.size(), Color());
+	return text.get_line_background_color(p_line);
+}
+
 void TextEdit::add_keyword(const String &p_keyword) {
 	keywords.insert(p_keyword);
 }
@@ -5437,12 +5455,6 @@ void TextEdit::_text_changed_emit() {
 	text_changed_dirty = false;
 }
 
-void TextEdit::set_line_as_marked(int p_line, bool p_marked) {
-	ERR_FAIL_INDEX(p_line, text.size());
-	text.set_marked(p_line, p_marked);
-	update();
-}
-
 void TextEdit::set_line_as_hidden(int p_line, bool p_hidden) {
 	ERR_FAIL_INDEX(p_line, text.size());
 	if (is_hiding_enabled() || !p_hidden) {
@@ -6980,6 +6992,10 @@ void TextEdit::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_line_gutter_clickable", "line", "gutter", "clickable"), &TextEdit::set_line_gutter_clickable);
 	ClassDB::bind_method(D_METHOD("is_line_gutter_clickable", "line", "gutter"), &TextEdit::is_line_gutter_clickable);
 
+	// Line style
+	ClassDB::bind_method(D_METHOD("set_line_background_color", "line", "color"), &TextEdit::set_line_background_color);
+	ClassDB::bind_method(D_METHOD("get_line_background_color", "line"), &TextEdit::get_line_background_color);
+
 	ClassDB::bind_method(D_METHOD("set_highlight_current_line", "enabled"), &TextEdit::set_highlight_current_line);
 	ClassDB::bind_method(D_METHOD("is_highlight_current_line_enabled"), &TextEdit::is_highlight_current_line_enabled);
 

scene/gui/text_edit.h

@@ -92,7 +92,7 @@ private:
 			Vector<Vector2i> bidi_override;
 			Ref<TextParagraph> data_buf;
 
-			bool marked = false;
+			Color background_color = Color(0, 0, 0, 0);
 			bool hidden = false;
 
 			Line() {
@@ -129,12 +129,11 @@ private:
 
 		void set_width(float p_width);
 		int get_line_wrap_amount(int p_line) const;
+
 		Vector<Vector2i> get_line_wrap_ranges(int p_line) const;
 		const Ref<TextParagraph> get_line_data(int p_line) const;
 
 		void set(int p_line, const String &p_text, const Vector<Vector2i> &p_bidi_override);
-		void set_marked(int p_line, bool p_marked) { text.write[p_line].marked = p_marked; }
-		bool is_marked(int p_line) const { return text[p_line].marked; }
 		void set_hidden(int p_line, bool p_hidden) { text.write[p_line].hidden = p_hidden; }
 		bool is_hidden(int p_line) const { return text[p_line].hidden; }
 		void insert(int p_at, const String &p_text, const Vector<Vector2i> &p_bidi_override);
@@ -167,6 +166,10 @@ private:
 
 		void set_line_gutter_clickable(int p_line, int p_gutter, bool p_clickable) { text.write[p_line].gutters.write[p_gutter].clickable = p_clickable; }
 		bool is_line_gutter_clickable(int p_line, int p_gutter) const { return text[p_line].gutters[p_gutter].clickable; }
+
+		/* Line style. */
+		void set_line_background_color(int p_line, const Color &p_color) { text.write[p_line].background_color = p_color; }
+		const Color get_line_background_color(int p_line) const { return text[p_line].background_color; }
 	};
 
 	struct Cursor {
@@ -484,7 +487,6 @@ protected:
 		Color font_selected_color;
 		Color font_readonly_color;
 		Color selection_color;
-		Color mark_color;
 		Color code_folding_color;
 		Color current_line_color;
 		Color line_length_guideline_color;
@@ -561,6 +563,10 @@ public:
 	void set_line_gutter_clickable(int p_line, int p_gutter, bool p_clickable);
 	bool is_line_gutter_clickable(int p_line, int p_gutter) const;
 
+	// Line style
+	void set_line_background_color(int p_line, const Color &p_color);
+	Color get_line_background_color(int p_line);
+
 	enum MenuItems {
 		MENU_CUT,
 		MENU_COPY,
@@ -637,7 +643,6 @@ public:
 	void insert_text_at_cursor(const String &p_text);
 	void insert_at(const String &p_text, int at);
 	int get_line_count() const;
-	void set_line_as_marked(int p_line, bool p_marked);
 
 	void set_line_as_hidden(int p_line, bool p_hidden);
 	bool is_line_hidden(int p_line) const;

scene/resources/default_theme/default_theme.cpp

@@ -451,7 +451,6 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 	theme->set_color("font_readonly_color", "TextEdit", Color(control_font_color.r, control_font_color.g, control_font_color.b, 0.5f));
 	theme->set_color("font_outline_color", "TextEdit", Color(1, 1, 1));
 	theme->set_color("selection_color", "TextEdit", control_selection_color);
-	theme->set_color("mark_color", "TextEdit", Color(1.0, 0.4, 0.4, 0.4));
 	theme->set_color("code_folding_color", "TextEdit", Color(0.8, 0.8, 0.8, 0.8));
 	theme->set_color("current_line_color", "TextEdit", Color(0.25, 0.25, 0.26, 0.8));
 	theme->set_color("caret_color", "TextEdit", control_font_color);
@@ -494,7 +493,6 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 	theme->set_color("font_readonly_color", "CodeEdit", Color(control_font_color.r, control_font_color.g, control_font_color.b, 0.5f));
 	theme->set_color("font_outline_color", "CodeEdit", Color(1, 1, 1));
 	theme->set_color("selection_color", "CodeEdit", control_selection_color);
-	theme->set_color("mark_color", "CodeEdit", Color(1.0, 0.4, 0.4, 0.4));
 	theme->set_color("bookmark_color", "CodeEdit", Color(0.5, 0.64, 1, 0.8));
 	theme->set_color("breakpoint_color", "CodeEdit", Color(0.9, 0.29, 0.3));
 	theme->set_color("executing_line_color", "CodeEdit", Color(0.98, 0.89, 0.27));