Add quick measurement between objects and artboards (#3274)

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

@@ -1759,6 +1759,20 @@ impl DocumentMessageHandler {
 			})
 	}
 
+	/// Find layers (including artboards) under the location in viewport space that was clicked, listed by their depth in the layer tree hierarchy.
+	pub fn click_list_with_artboards<'a>(&'a self, ipp: &InputPreprocessorMessageHandler) -> impl Iterator<Item = LayerNodeIdentifier> + use<'a> {
+		self.click_xray(ipp)
+			.skip_while(|&layer| layer == LayerNodeIdentifier::ROOT_PARENT)
+			.scan(true, |last_had_children, layer| {
+				if *last_had_children {
+					*last_had_children = layer.has_children(self.network_interface.document_metadata());
+					Some(layer)
+				} else {
+					None
+				}
+			})
+	}
+
 	pub fn click_list_no_parents<'a>(&'a self, ipp: &InputPreprocessorMessageHandler) -> impl Iterator<Item = LayerNodeIdentifier> + use<'a> {
 		self.click_xray(ipp)
 			.filter(move |&layer| !self.network_interface.is_artboard(&layer.to_node(), &[]) && !layer.has_children(self.network_interface.document_metadata()))

editor/src/messages/tool/tool_messages/select_tool.rs

@@ -660,10 +660,11 @@ impl Fsm for SelectToolFsmState {
 				// TODO: Don't use `Key::MouseMiddle` directly, instead take it as a variable from the input mappings list like in all other places; or find a better way than checking the key state
 				if !matches!(self, Self::Drawing { .. }) && !input.keyboard.get(Key::MouseMiddle as usize) {
 					// Get the layer the user is hovering over
-					let click = document.click(input);
+					// Artboards are included since they're needed for quick measurement, but will be filtered out for selection later on
+					let click = document.click_list_with_artboards(input).last();
 					let not_selected_click = click.filter(|&hovered_layer| !document.network_interface.selected_nodes().selected_layers_contains(hovered_layer, document.metadata()));
 					if let Some(layer) = not_selected_click {
-						if overlay_context.visibility_settings.hover_outline() {
+						if overlay_context.visibility_settings.hover_outline() && !document.network_interface.is_artboard(&layer.to_node(), &[]) {
 							let layer_to_viewport = document.metadata().transform_to_viewport(layer);
 							let mut hover_overlay_draw = |layer: LayerNodeIdentifier, color: Option<&str>| {
 								if layer.has_children(document.metadata()) {
@@ -707,7 +708,7 @@ impl Fsm for SelectToolFsmState {
 								.network_interface
 								.selected_nodes()
 								.selected_visible_and_unlocked_layers(&document.network_interface)
-								// Exclude layers that are artboards
+								// Exclude layers that are artboards from the selection bounding box
 								.filter(|layer| !document.network_interface.is_artboard(&layer.to_node(), &[]))
 								// For each remaining layer, try to get its document-space bounding box and convert it to a Rect
 								.filter_map(|layer| document.metadata().bounding_box_document(layer).map(Rect::from_box))