Bring back script encryption in export preset

Retrieved working implementation from 2.1 branch and adapted to
existing export preset system.

Added Script tab in export preset to export script as raw text,
compiled, or encrypted (same as in 2.1). The script encryption key is
visually validated. The script export mode and the key is saved per
per preset in `export_presets.cfg`, so it makes sense to ignore this
file in version control system.

Each custom exporting procedure can retrieve an export preset set
during project exporting. Refactored project export dialog a bit to
allow easier code comprehension.

editor/project_export.cpp

@@ -80,7 +80,7 @@ void ProjectExportDialog::popup_export() {
 
 	_update_presets();
 	if (presets->get_current() >= 0) {
-		_edit_preset(presets->get_current()); // triggers rescan for templates if newly installed
+		_update_current_preset(); // triggers rescan for templates if newly installed
 	}
 
 	// Restore valid window bounds or pop up at default size.
@@ -137,13 +137,18 @@ void ProjectExportDialog::_add_preset(int p_platform) {
 	_edit_preset(EditorExport::get_singleton()->get_export_preset_count() - 1);
 }
 
+void ProjectExportDialog::_update_current_preset() {
+
+	_edit_preset(presets->get_current());
+}
+
 void ProjectExportDialog::_update_presets() {
 
 	updating = true;
 
 	Ref<EditorExportPreset> current;
 	if (presets->get_current() >= 0 && presets->get_current() < presets->get_item_count())
-		current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+		current = get_current_preset();
 
 	int current_idx = -1;
 	presets->clear();
@@ -300,12 +305,33 @@ void ProjectExportDialog::_edit_preset(int p_index) {
 	_update_export_all();
 	minimum_size_changed();
 
+	int script_export_mode = current->get_script_export_mode();
+	script_mode->select(script_export_mode);
+
+	String key = current->get_script_encryption_key();
+	if (!updating_script_key) {
+		script_key->set_text(key);
+	}
+	if (script_export_mode == EditorExportPreset::MODE_SCRIPT_ENCRYPTED) {
+		script_key->set_editable(true);
+
+		bool key_valid = _validate_script_encryption_key(key);
+		if (key_valid) {
+			script_key_error->hide();
+		} else {
+			script_key_error->show();
+		}
+	} else {
+		script_key->set_editable(false);
+		script_key_error->hide();
+	}
+
 	updating = false;
 }
 
 void ProjectExportDialog::_update_feature_list() {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	Set<String> fset;
@@ -342,7 +368,7 @@ void ProjectExportDialog::_custom_features_changed(const String &p_text) {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	current->set_custom_features(p_text);
@@ -359,7 +385,7 @@ void ProjectExportDialog::_patch_button_pressed(Object *p_item, int p_column, in
 
 	patch_index = ti->get_metadata(0);
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	if (p_id == 0) {
@@ -379,7 +405,7 @@ void ProjectExportDialog::_patch_edited() {
 		return;
 	int index = item->get_metadata(0);
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	Vector<String> patches = current->get_patches();
@@ -397,7 +423,7 @@ void ProjectExportDialog::_patch_edited() {
 
 void ProjectExportDialog::_patch_selected(const String &p_path) {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	Vector<String> patches = current->get_patches();
@@ -410,25 +436,25 @@ void ProjectExportDialog::_patch_selected(const String &p_path) {
 		current->set_patch(patch_index, ProjectSettings::get_singleton()->get_resource_path().path_to(p_path) + enabled);
 	}
 
-	_edit_preset(presets->get_current());
+	_update_current_preset();
 }
 
 void ProjectExportDialog::_patch_deleted() {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	Vector<String> patches = current->get_patches();
 	if (patch_index < patches.size()) {
 
 		current->remove_patch(patch_index);
-		_edit_preset(presets->get_current());
+		_update_current_preset();
 	}
 }
 
 void ProjectExportDialog::_update_parameters(const String &p_edited_property) {
 
-	_edit_preset(presets->get_current());
+	_update_current_preset();
 }
 
 void ProjectExportDialog::_runnable_pressed() {
@@ -436,7 +462,7 @@ void ProjectExportDialog::_runnable_pressed() {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	if (runnable->is_pressed()) {
@@ -460,7 +486,7 @@ void ProjectExportDialog::_name_changed(const String &p_string) {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	current->set_name(p_string);
@@ -468,34 +494,77 @@ void ProjectExportDialog::_name_changed(const String &p_string) {
 }
 
 void ProjectExportDialog::set_export_path(const String &p_value) {
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	current->set_export_path(p_value);
 }
 
 String ProjectExportDialog::get_export_path() {
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND_V(current.is_null(), String(""));
 
 	return current->get_export_path();
 }
 
+Ref<EditorExportPreset> ProjectExportDialog::get_current_preset() const {
+
+	return EditorExport::get_singleton()->get_export_preset(presets->get_current());
+}
+
 void ProjectExportDialog::_export_path_changed(const StringName &p_property, const Variant &p_value) {
 
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 
 	current->set_export_path(p_value);
 	_update_presets();
 }
 
+void ProjectExportDialog::_script_export_mode_changed(int p_mode) {
+
+	if (updating)
+		return;
+
+	Ref<EditorExportPreset> current = get_current_preset();
+	ERR_FAIL_COND(current.is_null());
+
+	current->set_script_export_mode(p_mode);
+
+	_update_current_preset();
+}
+
+void ProjectExportDialog::_script_encryption_key_changed(const String &p_key) {
+
+	if (updating)
+		return;
+
+	Ref<EditorExportPreset> current = get_current_preset();
+	ERR_FAIL_COND(current.is_null());
+
+	current->set_script_encryption_key(p_key);
+
+	updating_script_key = true;
+	_update_current_preset();
+	updating_script_key = false;
+}
+
+bool ProjectExportDialog::_validate_script_encryption_key(const String &p_key) {
+
+	bool is_valid = false;
+
+	if (!p_key.empty() && p_key.is_valid_hex_number(false) && p_key.length() == 64) {
+		is_valid = true;
+	}
+	return is_valid;
+}
+
 void ProjectExportDialog::_duplicate_preset() {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -550,7 +619,7 @@ void ProjectExportDialog::_duplicate_preset() {
 
 void ProjectExportDialog::_delete_preset() {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -688,12 +757,12 @@ void ProjectExportDialog::drop_data_fw(const Point2 &p_point, const Variant &p_d
 			to_pos--;
 		}
 
-		Ref<EditorExportPreset> preset = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+		Ref<EditorExportPreset> preset = get_current_preset();
 		String patch = preset->get_patch(from_pos);
 		preset->remove_patch(from_pos);
 		preset->add_patch(patch, to_pos);
 
-		_edit_preset(presets->get_current());
+		_update_current_preset();
 	}
 }
 
@@ -702,7 +771,7 @@ void ProjectExportDialog::_export_type_changed(int p_which) {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -717,7 +786,7 @@ void ProjectExportDialog::_filter_changed(const String &p_filter) {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -731,7 +800,7 @@ void ProjectExportDialog::_fill_resource_tree() {
 	include_label->hide();
 	include_margin->hide();
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -793,7 +862,7 @@ void ProjectExportDialog::_tree_changed() {
 	if (updating)
 		return;
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	if (current.is_null())
 		return;
 
@@ -818,7 +887,7 @@ void ProjectExportDialog::_export_pck_zip() {
 
 void ProjectExportDialog::_export_pck_zip_selected(const String &p_path) {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 	Ref<EditorExportPlatform> platform = current->get_platform();
 	ERR_FAIL_COND(platform.is_null());
@@ -857,7 +926,7 @@ void ProjectExportDialog::_validate_export_path(const String &p_path) {
 
 void ProjectExportDialog::_export_project() {
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 	Ref<EditorExportPlatform> platform = current->get_platform();
 	ERR_FAIL_COND(platform.is_null());
@@ -895,7 +964,7 @@ void ProjectExportDialog::_export_project_to_path(const String &p_path) {
 	default_filename = p_path.get_file().get_basename();
 	EditorSettings::get_singleton()->set_project_metadata("export_options", "default_filename", default_filename);
 
-	Ref<EditorExportPreset> current = EditorExport::get_singleton()->get_export_preset(presets->get_current());
+	Ref<EditorExportPreset> current = get_current_preset();
 	ERR_FAIL_COND(current.is_null());
 	Ref<EditorExportPlatform> platform = current->get_platform();
 	ERR_FAIL_COND(platform.is_null());
@@ -971,6 +1040,8 @@ void ProjectExportDialog::_bind_methods() {
 	ClassDB::bind_method("_open_export_template_manager", &ProjectExportDialog::_open_export_template_manager);
 	ClassDB::bind_method("_validate_export_path", &ProjectExportDialog::_validate_export_path);
 	ClassDB::bind_method("_export_path_changed", &ProjectExportDialog::_export_path_changed);
+	ClassDB::bind_method("_script_export_mode_changed", &ProjectExportDialog::_script_export_mode_changed);
+	ClassDB::bind_method("_script_encryption_key_changed", &ProjectExportDialog::_script_encryption_key_changed);
 	ClassDB::bind_method("_export_project", &ProjectExportDialog::_export_project);
 	ClassDB::bind_method("_export_project_to_path", &ProjectExportDialog::_export_project_to_path);
 	ClassDB::bind_method("_export_all", &ProjectExportDialog::_export_all);
@@ -980,6 +1051,7 @@ void ProjectExportDialog::_bind_methods() {
 	ClassDB::bind_method("_tab_changed", &ProjectExportDialog::_tab_changed);
 	ClassDB::bind_method("set_export_path", &ProjectExportDialog::set_export_path);
 	ClassDB::bind_method("get_export_path", &ProjectExportDialog::get_export_path);
+	ClassDB::bind_method("get_current_preset", &ProjectExportDialog::get_current_preset);
 
 	ADD_PROPERTY(PropertyInfo(Variant::STRING, "export_path"), "set_export_path", "get_export_path");
 }
@@ -1127,6 +1199,25 @@ ProjectExportDialog::ProjectExportDialog() {
 	feature_vb->add_margin_child(TTR("Feature List:"), features_panel, true);
 	sections->add_child(feature_vb);
 
+	updating_script_key = false;
+
+	VBoxContainer *script_vb = memnew(VBoxContainer);
+	script_vb->set_name(TTR("Script"));
+	script_mode = memnew(OptionButton);
+	script_vb->add_margin_child(TTR("Script Export Mode:"), script_mode);
+	script_mode->add_item(TTR("Text"), (int)EditorExportPreset::MODE_SCRIPT_TEXT);
+	script_mode->add_item(TTR("Compiled"), (int)EditorExportPreset::MODE_SCRIPT_COMPILED);
+	script_mode->add_item(TTR("Encrypted (Provide Key Below)"), (int)EditorExportPreset::MODE_SCRIPT_ENCRYPTED);
+	script_mode->connect("item_selected", this, "_script_export_mode_changed");
+	script_key = memnew(LineEdit);
+	script_key->connect("text_changed", this, "_script_encryption_key_changed");
+	script_key_error = memnew(Label);
+	script_key_error->set_text("- " + TTR("Invalid Encryption Key (must be 64 characters long)"));
+	script_key_error->add_color_override("font_color", EditorNode::get_singleton()->get_gui_base()->get_color("error_color", "Editor"));
+	script_vb->add_margin_child(TTR("Script Encryption Key (256-bits as hex):"), script_key);
+	script_vb->add_child(script_key_error);
+	sections->add_child(script_vb);
+
 	sections->connect("tab_changed", this, "_tab_changed");
 
 	//disable by default
@@ -1135,6 +1226,7 @@ ProjectExportDialog::ProjectExportDialog() {
 	runnable->set_disabled(true);
 	duplicate_preset->set_disabled(true);
 	delete_preset->set_disabled(true);
+	script_key_error->hide();
 	sections->hide();
 	parameters->edit(NULL);