Make documents fall back to "Untitled Document" (+ number suffix) if given a blank name (#4074)

* Make documents fall back to "Untitled Document" (+ number suffix) if given a blank name

* Bug fix

editor/src/messages/dialog/dialog_message_handler.rs

@@ -126,7 +126,7 @@ impl MessageHandler<DialogMessage, DialogMessageContext<'_>> for DialogMessageHa
 			DialogMessage::RequestNewDocumentDialog => {
 				self.on_dismiss = Some(DialogMessage::Close.into());
 				self.new_document_dialog = NewDocumentDialogMessageHandler {
-					name: portfolio.generate_new_document_name(),
+					name: portfolio.generate_new_document_name(None),
 					infinite: false,
 					dimensions: glam::UVec2::new(1920, 1080),
 				};

editor/src/messages/portfolio/document/document_message_handler.rs

@@ -784,7 +784,15 @@ impl MessageHandler<DocumentMessage, DocumentMessageContext<'_>> for DocumentMes
 				responses.add(EventMessage::SelectionChanged);
 			}
 			DocumentMessage::RenameDocument { new_name } => {
-				self.name = new_name.clone();
+				let new_name = new_name.trim().to_string();
+
+				// No-op when the resolved name is unchangedL committing the rename field without edits (or with
+				// only whitespace edits) shouldn't dissociate the document from its file on disk or mark it unsaved.
+				if new_name == self.name {
+					return;
+				}
+
+				self.name = new_name;
 
 				self.path = None;
 				self.set_save_state(false);

editor/src/messages/portfolio/document/node_graph/node_graph_message_handler.rs

@@ -2475,7 +2475,7 @@ impl NodeGraphMessageHandler {
 					Separator::new(SeparatorStyle::Related).widget_instance(),
 					TextInput::new(context.document_name)
 						.tooltip_description("Name of the current document.")
-						.on_update(|text_input| DocumentMessage::RenameDocument { new_name: text_input.value.clone() }.into())
+						.on_update(|text_input| PortfolioMessage::RenameDocument { new_name: text_input.value.clone() }.into())
 						.widget_instance(),
 					Separator::new(SeparatorStyle::Related).widget_instance(),
 				])];

editor/src/messages/portfolio/portfolio_message.rs

@@ -168,6 +168,9 @@ pub enum PortfolioMessage {
 	SelectDocument {
 		document_id: DocumentId,
 	},
+	RenameDocument {
+		new_name: String,
+	},
 	SubmitDocumentExport {
 		name: String,
 		file_type: FileType,

editor/src/messages/portfolio/portfolio_message_handler.rs

@@ -498,7 +498,7 @@ impl MessageHandler<PortfolioMessage, PortfolioMessageContext<'_>> for Portfolio
 			}
 			PortfolioMessage::NewDocumentWithName { name } => {
 				let mut new_document = DocumentMessageHandler::default();
-				new_document.name = name;
+				new_document.name = self.resolve_document_name(name, None);
 
 				responses.add(DocumentMessage::PTZUpdate);
 
@@ -799,28 +799,24 @@ impl MessageHandler<PortfolioMessage, PortfolioMessageContext<'_>> for Portfolio
 					}
 				});
 
-				match (document_name, document_path, document_name_from_path) {
-					(Some(name), _, None) => {
-						document.name = name;
-					}
+				let candidate_name = match (document_name, document_path, document_name_from_path) {
+					(Some(name), _, None) => name,
 					(_, Some(path), Some(name)) => {
-						document.name = name;
 						document.path = Some(path);
+						name
 					}
-					(_, _, Some(name)) => {
-						document.name = name;
-					}
-					_ => {
-						document.name = DEFAULT_DOCUMENT_NAME.to_string();
-					}
-				}
+					(_, _, Some(name)) => name,
+					_ => String::new(),
+				};
+				document.name = self.resolve_document_name(candidate_name, None);
 
 				// Load the document into the portfolio so it opens in the editor
 				self.load_document(document, document_id, responses);
 			}
 			PortfolioMessage::OpenImage { name, image } => {
+				// `NewDocumentWithName`'s handler routes empty/None-equivalent names through `resolve_document_name` which assigns the next available "Untitled Document {N}".
 				responses.add(PortfolioMessage::NewDocumentWithName {
-					name: name.clone().unwrap_or(DEFAULT_DOCUMENT_NAME.into()),
+					name: name.clone().unwrap_or_default(),
 				});
 
 				responses.add(DocumentMessage::PasteImage {
@@ -847,7 +843,7 @@ impl MessageHandler<PortfolioMessage, PortfolioMessageContext<'_>> for Portfolio
 			}
 			PortfolioMessage::OpenSvg { name, svg } => {
 				responses.add(PortfolioMessage::NewDocumentWithName {
-					name: name.clone().unwrap_or(DEFAULT_DOCUMENT_NAME.into()),
+					name: name.clone().unwrap_or_default(),
 				});
 
 				// Parse the SVG to extract its declared canvas origin and dimensions from the viewBox attribute.
@@ -1359,6 +1355,10 @@ impl MessageHandler<PortfolioMessage, PortfolioMessageContext<'_>> for Portfolio
 					self.refresh_panel_content(target_active, responses);
 				}
 			}
+			PortfolioMessage::RenameDocument { new_name } => {
+				let resolved_name = self.resolve_document_name(new_name, self.active_document_id);
+				responses.add(DocumentMessage::RenameDocument { new_name: resolved_name });
+			}
 			PortfolioMessage::SelectDocument { document_id } => {
 				// Auto-save the document we are leaving
 				let mut node_graph_open = false;
@@ -1744,10 +1744,22 @@ impl PortfolioMessageHandler {
 		}
 	}
 
-	pub fn generate_new_document_name(&self) -> String {
+	/// Resolves a proposed document name: if it's empty or only whitespace, falls back to the next
+	/// available "Untitled Document {N}" via [`Self::generate_new_document_name`]. Otherwise trims surrounding
+	/// whitespace and returns it. `exclude` is forwarded so a renaming document can skip its own current
+	/// name when computing the fallback (preventing self-collision).
+	pub fn resolve_document_name(&self, name: String, exclude: Option<DocumentId>) -> String {
+		let trimmed = name.trim();
+		if trimmed.is_empty() { self.generate_new_document_name(exclude) } else { trimmed.to_string() }
+	}
+
+	/// `exclude` lets a renaming caller skip its own current name so a document can rename back to its
+	/// existing slot rather than colliding with itself and getting bumped to the next number.
+	pub fn generate_new_document_name(&self, exclude: Option<DocumentId>) -> String {
 		let mut doc_title_numbers = self
 			.document_ids
 			.iter()
+			.filter(|id| exclude != Some(**id))
 			.filter_map(|id| self.document_details(*id))
 			.filter_map(|doc| {
 				doc.name

frontend/wrapper/src/editor_wrapper.rs

@@ -410,7 +410,7 @@ impl EditorWrapper {
 	/// Rename the currently active document.
 	#[wasm_bindgen(js_name = renameDocument)]
 	pub fn rename_document(&self, new_name: String) {
-		let message = DocumentMessage::RenameDocument { new_name };
+		let message = PortfolioMessage::RenameDocument { new_name };
 		self.dispatch(message);
 	}