Add an option to drag'n'drop selected text in TextEdit

(cherry picked from commit 5d56efcaa4ccb20d0248f0e6950b04e69c70c95f)

doc/classes/TextEdit.xml

@@ -495,6 +495,9 @@
 		<member name="deselect_on_focus_loss_enabled" type="bool" setter="set_deselect_on_focus_loss_enabled" getter="is_deselect_on_focus_loss_enabled" default="true">
 			If [code]true[/code], the selected text will be deselected when focus is lost.
 		</member>
+		<member name="drag_and_drop_selection_enabled" type="bool" setter="set_drag_and_drop_selection_enabled" getter="is_drag_and_drop_selection_enabled" default="true">
+			If [code]true[/code], allow drag and drop of selected text.
+		</member>
 		<member name="draw_spaces" type="bool" setter="set_draw_spaces" getter="is_drawing_spaces" default="false">
 			If [code]true[/code], the "space" character will have a visible representation.
 		</member>

editor/code_editor.cpp

@@ -923,6 +923,7 @@ void CodeTextEditor::update_editor_settings() {
 	text_editor->set_v_scroll_speed(EditorSettings::get_singleton()->get("text_editor/navigation/v_scroll_speed"));
 	text_editor->set_draw_minimap(EditorSettings::get_singleton()->get("text_editor/navigation/show_minimap"));
 	text_editor->set_minimap_width((int)EditorSettings::get_singleton()->get("text_editor/navigation/minimap_width") * EDSCALE);
+	text_editor->set_drag_and_drop_selection_enabled(EditorSettings::get_singleton()->get("text_editor/navigation/drag_and_drop_selection"));
 	text_editor->set_show_line_numbers(EditorSettings::get_singleton()->get("text_editor/appearance/show_line_numbers"));
 	text_editor->set_line_numbers_zero_padded(EditorSettings::get_singleton()->get("text_editor/appearance/line_numbers_zero_padded"));
 	text_editor->set_bookmark_gutter_enabled(EditorSettings::get_singleton()->get("text_editor/appearance/show_bookmark_gutter"));

editor/editor_settings.cpp

@@ -438,6 +438,7 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	_initial_set("text_editor/navigation/minimap_width", 80);
 	hints["text_editor/navigation/minimap_width"] = PropertyInfo(Variant::INT, "text_editor/navigation/minimap_width", PROPERTY_HINT_RANGE, "50,250,1");
 	_initial_set("text_editor/navigation/mouse_extra_buttons_navigate_history", true);
+	_initial_set("text_editor/navigation/drag_and_drop_selection", true);
 
 	// Appearance
 	_initial_set("text_editor/appearance/show_line_numbers", true);

scene/gui/text_edit.cpp

@@ -2581,7 +2581,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 
 						update();
 					}
-				} else if (is_mouse_over_selection()) {
+				} else if (drag_and_drop_selection_enabled && is_mouse_over_selection()) {
 					selection.selecting_mode = Selection::MODE_NONE;
 					selection.drag_attempt = true;
 				} else {
@@ -7362,6 +7362,14 @@ bool TextEdit::is_deselect_on_focus_loss_enabled() const {
 	return deselect_on_focus_loss_enabled;
 }
 
+void TextEdit::set_drag_and_drop_selection_enabled(const bool p_enabled) {
+	drag_and_drop_selection_enabled = p_enabled;
+}
+
+bool TextEdit::is_drag_and_drop_selection_enabled() const {
+	return drag_and_drop_selection_enabled;
+}
+
 bool TextEdit::is_shortcut_keys_enabled() const {
 	return shortcut_keys_enabled;
 }
@@ -7478,6 +7486,8 @@ void TextEdit::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_selecting_enabled"), &TextEdit::is_selecting_enabled);
 	ClassDB::bind_method(D_METHOD("set_deselect_on_focus_loss_enabled", "enable"), &TextEdit::set_deselect_on_focus_loss_enabled);
 	ClassDB::bind_method(D_METHOD("is_deselect_on_focus_loss_enabled"), &TextEdit::is_deselect_on_focus_loss_enabled);
+	ClassDB::bind_method(D_METHOD("set_drag_and_drop_selection_enabled", "enable"), &TextEdit::set_drag_and_drop_selection_enabled);
+	ClassDB::bind_method(D_METHOD("is_drag_and_drop_selection_enabled"), &TextEdit::is_drag_and_drop_selection_enabled);
 	ClassDB::bind_method(D_METHOD("is_line_set_as_safe", "line"), &TextEdit::is_line_set_as_safe);
 	ClassDB::bind_method(D_METHOD("set_line_as_safe", "line", "safe"), &TextEdit::set_line_as_safe);
 	ClassDB::bind_method(D_METHOD("is_line_set_as_bookmark", "line"), &TextEdit::is_line_set_as_bookmark);
@@ -7592,6 +7602,7 @@ void TextEdit::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "middle_mouse_paste_enabled"), "set_middle_mouse_paste_enabled", "is_middle_mouse_paste_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selecting_enabled"), "set_selecting_enabled", "is_selecting_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "deselect_on_focus_loss_enabled"), "set_deselect_on_focus_loss_enabled", "is_deselect_on_focus_loss_enabled");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "drag_and_drop_selection_enabled"), "set_drag_and_drop_selection_enabled", "is_drag_and_drop_selection_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "smooth_scrolling"), "set_smooth_scroll_enable", "is_smooth_scroll_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::REAL, "v_scroll_speed"), "set_v_scroll_speed", "get_v_scroll_speed");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "hiding_enabled"), "set_hiding_enabled", "is_hiding_enabled");

scene/gui/text_edit.h

@@ -438,6 +438,7 @@ private:
 
 	bool selecting_enabled;
 	bool deselect_on_focus_loss_enabled;
+	bool drag_and_drop_selection_enabled = true;
 	bool popup_show = false;
 
 	bool context_menu_enabled;
@@ -762,6 +763,7 @@ public:
 	bool is_drawing_tabs() const;
 	void set_draw_spaces(bool p_draw);
 	bool is_drawing_spaces() const;
+
 	void set_override_selected_font_color(bool p_override_selected_font_color);
 	bool is_overriding_selected_font_color() const;
 
@@ -861,6 +863,9 @@ public:
 	void set_deselect_on_focus_loss_enabled(const bool p_enabled);
 	bool is_deselect_on_focus_loss_enabled() const;
 
+	void set_drag_and_drop_selection_enabled(const bool p_enabled);
+	bool is_drag_and_drop_selection_enabled() const;
+
 	void set_shortcut_keys_enabled(bool p_enabled);
 	bool is_shortcut_keys_enabled() const;