Make the Path tool support multi-point conversion between smooth/sharp on double-click (#2498)

* kinda works

* solved merge conflicts

* implement the multi flip

* nit-picks

* removed extra functions

* Fix inputs not being passed to backend for repeated double-clicks

* Code review

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

Author: 0SlowPoke0

editor/src/consts.rs

@@ -136,3 +136,6 @@ pub const DEFAULT_DOCUMENT_NAME: &str = "Untitled Document";
 pub const FILE_SAVE_SUFFIX: &str = ".graphite";
 pub const MAX_UNDO_HISTORY_LEN: usize = 100; // TODO: Add this to user preferences
 pub const AUTO_SAVE_TIMEOUT_SECONDS: u64 = 15;
+
+// INPUT
+pub const DOUBLE_CLICK_MILLISECONDS: u64 = 500;

editor/src/messages/tool/common_functionality/shape_editor.rs

@@ -70,7 +70,7 @@ impl SelectedLayerState {
 	}
 
 	pub fn ignore_handles(&mut self, status: bool) {
-		if self.ignore_handles == !status {
+		if self.ignore_handles != status {
 			return;
 		}
 
@@ -86,7 +86,7 @@ impl SelectedLayerState {
 	}
 
 	pub fn ignore_anchors(&mut self, status: bool) {
-		if self.ignore_anchors == !status {
+		if self.ignore_anchors != status {
 			return;
 		}
 
@@ -774,7 +774,7 @@ impl ShapeState {
 
 		// For a non-endpoint anchor, handles are perpendicular to the average tangent of adjacent segments.(Refer:https://github.com/GraphiteEditor/Graphite/pull/2620#issuecomment-2881501494)
 		let mut handle_direction = if segment_count > 1. {
-			segment_angle = segment_angle / segment_count;
+			segment_angle /= segment_count;
 			segment_angle += std::f64::consts::FRAC_PI_2;
 			DVec2::new(segment_angle.cos(), segment_angle.sin())
 		} else {
@@ -801,7 +801,7 @@ impl ShapeState {
 			let (non_zero_handle, zero_handle) = if a.length(vector_data) > 1e-6 { (a, b) } else { (b, a) };
 			let Some(direction) = non_zero_handle
 				.to_manipulator_point()
-				.get_position(&vector_data)
+				.get_position(vector_data)
 				.and_then(|position| (position - anchor_position).try_normalize())
 			else {
 				return;
@@ -1538,6 +1538,7 @@ impl ShapeState {
 			}
 		}
 	}
+
 	/// Converts a nearby clicked anchor point's handles between sharp (zero-length handles) and smooth (pulled-apart handle(s)).
 	/// If both handles aren't zero-length, they are set that. If both are zero-length, they are stretched apart by a reasonable amount.
 	/// This can can be activated by double clicking on an anchor with the Path tool.
@@ -1568,44 +1569,47 @@ impl ShapeState {
 				.count();
 
 			// Check by comparing the handle positions to the anchor if this manipulator group is a point
-			if positions != 0 {
-				self.convert_manipulator_handles_to_colinear(&vector_data, id, responses, layer);
-			} else {
-				for handle in vector_data.all_connected(id) {
-					let Some(bezier) = vector_data.segment_from_id(handle.segment) else { continue };
-
-					match bezier.handles {
-						BezierHandles::Linear => {}
-						BezierHandles::Quadratic { .. } => {
-							let segment = handle.segment;
-							// Convert to linear
-							let modification_type = VectorModificationType::SetHandles { segment, handles: [None; 2] };
-							responses.add(GraphOperationMessage::Vector { layer, modification_type });
+			for point in self.selected_points() {
+				let Some(point_id) = point.as_anchor() else { continue };
+				if positions != 0 {
+					self.convert_manipulator_handles_to_colinear(&vector_data, point_id, responses, layer);
+				} else {
+					for handle in vector_data.all_connected(point_id) {
+						let Some(bezier) = vector_data.segment_from_id(handle.segment) else { continue };
+
+						match bezier.handles {
+							BezierHandles::Linear => {}
+							BezierHandles::Quadratic { .. } => {
+								let segment = handle.segment;
+								// Convert to linear
+								let modification_type = VectorModificationType::SetHandles { segment, handles: [None; 2] };
+								responses.add(GraphOperationMessage::Vector { layer, modification_type });
 
-							// Set the manipulator to have non-colinear handles
-							for &handles in &vector_data.colinear_manipulators {
-								if handles.contains(&HandleId::primary(segment)) {
-									let modification_type = VectorModificationType::SetG1Continuous { handles, enabled: false };
-									responses.add(GraphOperationMessage::Vector { layer, modification_type });
+								// Set the manipulator to have non-colinear handles
+								for &handles in &vector_data.colinear_manipulators {
+									if handles.contains(&HandleId::primary(segment)) {
+										let modification_type = VectorModificationType::SetG1Continuous { handles, enabled: false };
+										responses.add(GraphOperationMessage::Vector { layer, modification_type });
+									}
 								}
 							}
-						}
-						BezierHandles::Cubic { .. } => {
-							// Set handle position to anchor position
-							let modification_type = handle.set_relative_position(DVec2::ZERO);
-							responses.add(GraphOperationMessage::Vector { layer, modification_type });
+							BezierHandles::Cubic { .. } => {
+								// Set handle position to anchor position
+								let modification_type = handle.set_relative_position(DVec2::ZERO);
+								responses.add(GraphOperationMessage::Vector { layer, modification_type });
 
-							// Set the manipulator to have non-colinear handles
-							for &handles in &vector_data.colinear_manipulators {
-								if handles.contains(&handle) {
-									let modification_type = VectorModificationType::SetG1Continuous { handles, enabled: false };
-									responses.add(GraphOperationMessage::Vector { layer, modification_type });
+								// Set the manipulator to have non-colinear handles
+								for &handles in &vector_data.colinear_manipulators {
+									if handles.contains(&handle) {
+										let modification_type = VectorModificationType::SetG1Continuous { handles, enabled: false };
+										responses.add(GraphOperationMessage::Vector { layer, modification_type });
+									}
 								}
 							}
 						}
 					}
-				}
-			};
+				};
+			}
 
 			Some(true)
 		};

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

@@ -365,6 +365,8 @@ struct PathToolData {
 	select_anchor_toggled: bool,
 	saved_points_before_handle_drag: Vec<ManipulatorPointId>,
 	handle_drag_toggle: bool,
+	saved_points_before_anchor_convert_smooth_sharp: HashSet<ManipulatorPointId>,
+	last_click_time: u64,
 	dragging_state: DraggingState,
 	angle: f64,
 	opposite_handle_position: Option<DVec2>,
@@ -448,6 +450,12 @@ impl PathToolData {
 
 		self.drag_start_pos = input.mouse.position;
 
+		if !self.saved_points_before_anchor_convert_smooth_sharp.is_empty() && (input.time - self.last_click_time > 500) {
+			self.saved_points_before_anchor_convert_smooth_sharp.clear();
+		}
+
+		self.last_click_time = input.time;
+
 		let old_selection = shape_editor.selected_points().cloned().collect::<Vec<_>>();
 
 		// Check if the point is already selected; if not, select the first point within the threshold (in pixels)
@@ -489,7 +497,7 @@ impl PathToolData {
 								let modification_type = handle.set_relative_position(DVec2::ZERO);
 								responses.add(GraphOperationMessage::Vector { layer, modification_type });
 								for &handles in &vector_data.colinear_manipulators {
-									if handles.contains(&handle) {
+									if handles.contains(handle) {
 										let modification_type = VectorModificationType::SetG1Continuous { handles, enabled: false };
 										responses.add(GraphOperationMessage::Vector { layer, modification_type });
 									}
@@ -506,7 +514,7 @@ impl PathToolData {
 
 				if let Some((Some(point), Some(vector_data))) = shape_editor
 					.find_nearest_point_indices(&document.network_interface, input.mouse.position, SELECTION_THRESHOLD)
-					.and_then(|(layer, point)| Some((point.as_anchor(), document.network_interface.compute_modified_vector(layer))))
+					.map(|(layer, point)| (point.as_anchor(), document.network_interface.compute_modified_vector(layer)))
 				{
 					let handles = vector_data
 						.all_connected(point)
@@ -1296,6 +1304,10 @@ impl Fsm for PathToolFsmState {
 			(PathToolFsmState::Ready, PathToolMessage::PointerMove { delete_segment, .. }) => {
 				tool_data.delete_segment_pressed = input.keyboard.get(delete_segment as usize);
 
+				if !tool_data.saved_points_before_anchor_convert_smooth_sharp.is_empty() {
+					tool_data.saved_points_before_anchor_convert_smooth_sharp.clear();
+				}
+
 				// If there is a point nearby, then remove the overlay
 				if shape_editor
 					.find_nearest_point_indices(&document.network_interface, input.mouse.position, SELECTION_THRESHOLD)
@@ -1490,6 +1502,10 @@ impl Fsm for PathToolFsmState {
 					if !drag_occurred && !extend_selection {
 						let clicked_selected = shape_editor.selected_points().any(|&point| nearest_point == point);
 						if clicked_selected {
+							if tool_data.saved_points_before_anchor_convert_smooth_sharp.is_empty() {
+								tool_data.saved_points_before_anchor_convert_smooth_sharp = shape_editor.selected_points().copied().collect::<HashSet<_>>();
+							}
+
 							shape_editor.deselect_all_points();
 							shape_editor.selected_shape_state.entry(layer).or_default().select_point(nearest_point);
 							responses.add(OverlaysMessage::Draw);
@@ -1537,7 +1553,11 @@ impl Fsm for PathToolFsmState {
 					// Flip the selected point between smooth and sharp
 					if !tool_data.double_click_handled && tool_data.drag_start_pos.distance(input.mouse.position) <= DRAG_THRESHOLD {
 						responses.add(DocumentMessage::StartTransaction);
+
+						shape_editor.select_points_by_manipulator_id(&tool_data.saved_points_before_anchor_convert_smooth_sharp.iter().copied().collect::<Vec<_>>());
 						shape_editor.flip_smooth_sharp(&document.network_interface, input.mouse.position, SELECTION_TOLERANCE, responses);
+						tool_data.saved_points_before_anchor_convert_smooth_sharp.clear();
+
 						responses.add(DocumentMessage::EndTransaction);
 						responses.add(PathToolMessage::SelectedPointUpdated);
 					}

frontend/src/io-managers/input.ts

@@ -212,7 +212,7 @@ export function createInputManager(editor: Editor, dialog: DialogState, portfoli
 		if (textToolInteractiveInputElement) return;
 
 		// Allow only double-clicks
-		if (e.detail !== 2) return;
+		if (e.detail % 2 == 1) return;
 
 		// `e.buttons` is always 0 in the `mouseup` event, so we have to convert from `e.button` instead
 		let buttons = 1;