mirror of
https://github.com/storytold/vectorcraft.git
synced 2026-10-14 19:26:56 -04:00
1025 lines
40 KiB
Rust
1025 lines
40 KiB
Rust
//! Shape Builder (Shift+M), Live Paint Bucket (K) and Live Paint Selection (Shift+L).
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//!
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//! The tools only emit commands (`shapeBuilder.merge`, `livePaint.fill`, `livePaint.strokeEdge`,
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//! `select.*`); the planar arrangement comes from `vectorcraft_pathops::shape_builder` (Shape
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//! Builder) and `vectorcraft_pathops::live_paint` (Live Paint).
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//!
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//! **Live Paint groups** are ordinary groups (no special node kind): the group's name starts with
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//! [`LIVE_PAINT_PREFIX`]; its first child is a hidden group named [`SOURCES_NAME`] holding the
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//! original paths (the planar map's inputs, kept for Release / Merge / re-computation), followed
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//! by the face paths (named [`FACE_NAME`], fill only) and the edge paths (named [`EDGE_NAME`],
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//! stroke only, open). Everything else in the document sees a plain group of paths, so rendering,
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//! export, transforms and undo need no special cases.
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use std::sync::Arc;
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use serde_json::{Value, json};
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use vectorcraft_doc::{Document, Node, NodeId, NodeKind};
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use vectorcraft_geom::{BezPath, FillRule, PathData, Point, Rect, Shape as _};
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use vectorcraft_pathops as po;
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use crate::{Action, Cursor, Mods, Overlay, PointerEvent, PointerKind, Tool, ToolContext, json_ids};
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/// Names starting with this mark a Live Paint group.
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pub const LIVE_PAINT_PREFIX: &str = "Live Paint";
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/// Default name of a new Live Paint group.
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pub const LIVE_PAINT_NAME: &str = "Live Paint Group";
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/// The hidden child group holding the source paths.
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pub const SOURCES_NAME: &str = "Live Paint Sources";
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pub const FACE_NAME: &str = "Face";
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pub const EDGE_NAME: &str = "Edge";
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/// Shape Builder hover hatch colour (neutral grey) and Live Paint highlight red.
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pub const HATCH: [u8; 3] = [0x80, 0x80, 0x80];
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pub const HIGHLIGHT_RED: [u8; 3] = [0xff, 0x2a, 0x2a];
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/// Is `n` a Live Paint group?
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pub fn is_live_paint(n: &Node) -> bool {
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matches!(n.kind, NodeKind::Group { clip: false, .. }) && n.name.as_deref().is_some_and(|s| s.starts_with(LIVE_PAINT_PREFIX))
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}
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fn named(n: &Node, name: &str) -> bool {
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n.name.as_deref() == Some(name)
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}
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/// Face children of a Live Paint group (paint order).
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pub fn faces(group: &Node) -> Vec<&Arc<Node>> {
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group.children().map(|c| c.iter().filter(|n| named(n, FACE_NAME)).collect()).unwrap_or_default()
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}
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/// Edge children of a Live Paint group.
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pub fn edges(group: &Node) -> Vec<&Arc<Node>> {
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group.children().map(|c| c.iter().filter(|n| named(n, EDGE_NAME)).collect()).unwrap_or_default()
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}
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/// The hidden sources group of a Live Paint group.
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pub fn sources(group: &Node) -> Option<&Arc<Node>> {
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group.children()?.iter().find(|n| named(n, SOURCES_NAME))
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}
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/// Does the path (filled) contain `p`?
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pub fn path_contains(path: &PathData, rule: FillRule, p: Point) -> bool {
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if path.bounds().is_none_or(|b| !b.inflate(1e-6, 1e-6).contains(p)) {
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return false;
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}
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let w = path.to_bezpath().winding(p);
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match rule {
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FillRule::EvenOdd => w % 2 != 0,
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_ => w != 0,
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}
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}
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/// The face of `group` under `p` (front-most).
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pub fn face_at(group: &Node, p: Point) -> Option<&Arc<Node>> {
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faces(group).into_iter().rev().find(|f| f.path_data().is_some_and(|pd| path_contains(pd, FillRule::NonZero, p)))
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}
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/// The edge of `group` nearest to `p` within `tol`.
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pub fn edge_near(group: &Node, p: Point, tol: f64) -> Option<&Arc<Node>> {
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let mut best: Option<(f64, &Arc<Node>)> = None;
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for e in edges(group) {
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if let Some((.., d)) = e.path_data().and_then(|pd| pd.nearest(p))
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&& d <= tol
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&& best.is_none_or(|b| d < b.0)
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{
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best = Some((d, e));
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}
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}
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best.map(|b| b.1)
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}
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/// The visible Live Paint group with a face under `p` (front-most in paint order).
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pub fn live_paint_at(doc: &Document, p: Point) -> Option<NodeId> {
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let mut hit = None;
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doc.walk(|n| {
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if is_live_paint(n) && doc.is_visible(n.id) && face_at(n, p).is_some() {
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hit = Some(n.id);
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}
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});
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hit
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}
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/// Paths, compound paths (as one shape) of a subtree in paint order; guides, clipping paths and
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/// hidden objects are skipped. Live Paint groups contribute their faces.
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pub fn leaf_shapes<'a>(n: &'a Node, out: &mut Vec<&'a Node>) {
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if !n.visible {
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return;
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}
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if n.shaper.is_some() {
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for c in n.children().into_iter().flatten().skip(1) {
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leaf_shapes(c, out);
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}
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return;
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}
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match &n.kind {
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NodeKind::Path { guide: true, .. } | NodeKind::Path { clipping: true, .. } => {}
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NodeKind::Path { .. } | NodeKind::Compound { .. } => out.push(n),
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NodeKind::Group { children, .. } | NodeKind::Layer { children, .. } => {
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for c in children {
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leaf_shapes(c, out);
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}
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}
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_ => {}
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}
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}
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/// Filled outline of a path or compound path node.
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pub fn node_outline(n: &Node) -> Option<(PathData, FillRule)> {
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match &n.kind {
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NodeKind::Path { path, rule, .. } => Some((path.clone(), *rule)),
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NodeKind::Compound { children, rule } => {
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let subs = children.iter().filter_map(|c| c.path_data()).flat_map(|p| p.subpaths.iter().cloned()).collect();
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Some((PathData::new(subs), *rule))
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}
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_ => None,
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}
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}
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/// Pathfinder shapes for the given roots (back → front by the order given), keyed by leaf index,
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/// with the leaves they came from.
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pub fn shapes_for<'a>(doc: &'a Document, roots: &[NodeId]) -> (Vec<po::Shape>, Vec<&'a Node>) {
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let mut lv = vec![];
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for id in roots {
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if let Some(n) = doc.node(*id) {
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leaf_shapes(n, &mut lv);
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}
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}
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let mut shapes = vec![];
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let mut used = vec![];
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for l in lv {
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if let Some((p, r)) = node_outline(l)
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&& !p.is_empty()
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&& p.subpaths.iter().all(|s| s.anchors.iter().all(|a| a.p.x.is_finite() && a.p.y.is_finite()))
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{
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shapes.push(po::Shape::new(p, r, used.len() as u64));
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used.push(l);
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}
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}
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(shapes, used)
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}
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/// Shape Builder inputs: [`shapes_for`], with the open subpaths of filled paths closed where that
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/// encloses an area (the fill bounds a region, as if an invisible edge closed it). Unfilled open
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/// paths and straight lines stay open and cut the regions they cross.
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fn shape_builder_shapes<'a>(doc: &'a Document, roots: &[NodeId]) -> (Vec<po::Shape>, Vec<&'a Node>) {
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let (mut shapes, leaves) = shapes_for(doc, roots);
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for (s, l) in shapes.iter_mut().zip(&leaves) {
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if l.appearance.fill_paint().is_none() {
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continue;
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}
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for sp in s.path.subpaths.iter_mut().filter(|sp| !sp.closed) {
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sp.closed = po::encloses_area(sp);
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}
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}
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(shapes, leaves)
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}
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/// A planar-map face with its outline and bounds, ready for hit tests.
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pub type Face = (po::Region, BezPath, Rect);
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fn faces_of(regions: Vec<po::Region>) -> Vec<Face> {
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regions
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.into_iter()
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.filter_map(|r| {
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let bp = r.path.to_bezpath();
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let b = r.path.bounds()?;
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Some((r, bp, b))
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})
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.collect()
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}
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/// The Shape Builder's planar map of a selection.
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#[derive(Default)]
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pub struct BuilderMap {
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/// The inputs, back → front (see [`po::shape_builder`]).
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pub shapes: Vec<po::Shape>,
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pub regions: Vec<Face>,
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/// Pieces of the unfilled open paths, keyed by input index, with their bounds.
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pub lines: Vec<(po::Shape, Rect)>,
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/// Pieces of the other inputs' outlines (cut wherever paths meet), keyed by input index, with
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/// their bounds: the edges erasing deletes. Only in a map made `with_edges`.
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pub edges: Vec<(po::Shape, Rect)>,
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}
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/// What a Shape Builder gesture touches at a point.
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#[derive(Clone, Copy, Debug, PartialEq, Eq)]
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pub enum Hit {
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Region(usize),
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Line(usize),
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Edge(usize),
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}
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/// The piece of `pieces` nearest `p` within `tol`, with its distance.
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fn piece_near(pieces: &[(po::Shape, Rect)], p: Point, tol: f64) -> Option<(f64, usize)> {
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let mut best: Option<(f64, usize)> = None;
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for (i, (l, b)) in pieces.iter().enumerate() {
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if b.inflate(tol, tol).contains(p)
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&& let Some((.., d)) = l.path.nearest(p)
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&& d <= tol
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&& best.is_none_or(|b| d < b.0)
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{
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best = Some((d, i));
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}
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}
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best
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}
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impl BuilderMap {
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/// The map of `roots` (sorted back → front), with the leaves the inputs came from; the outline
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/// edges only `with_edges` (they cost a planar map of their own when no open path is in).
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pub fn new<'a>(doc: &'a Document, roots: &[NodeId], with_edges: bool) -> (Self, Vec<&'a Node>) {
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let (shapes, leaves) = shape_builder_shapes(doc, roots);
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if shapes.is_empty() {
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return (Self::default(), leaves);
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}
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let arr = po::shape_builder(&shapes, with_edges);
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let bounded = |pieces: Vec<po::Shape>| {
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pieces
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.into_iter()
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.filter_map(|l| {
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let b = l.path.bounds()?;
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Some((l, b))
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})
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.collect()
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};
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(Self { shapes, regions: faces_of(arr.regions), lines: bounded(arr.lines), edges: bounded(arr.edges) }, leaves)
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}
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/// The region containing `p`.
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pub fn region_at(&self, p: Point) -> Option<usize> {
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self.regions.iter().position(|(_, bp, b)| b.contains(p) && bp.winding(p) != 0)
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}
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/// What a gesture at `p` touches: with `piece_tol` (erasing), the line piece or edge that
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/// close, else the region under it.
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pub fn hit(&self, p: Point, piece_tol: Option<f64>) -> Option<Hit> {
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let piece = piece_tol.and_then(|t| match (piece_near(&self.lines, p, t), piece_near(&self.edges, p, t)) {
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(Some(l), Some(e)) if e.0 < l.0 => Some(Hit::Edge(e.1)),
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(Some(l), _) => Some(Hit::Line(l.1)),
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(None, e) => e.map(|e| Hit::Edge(e.1)),
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});
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piece.or_else(|| self.region_at(p).map(Hit::Region))
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}
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/// The regions just either side of the middle of `piece` (None: outside every region).
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pub fn sides(&self, piece: &po::Shape) -> [Option<usize>; 2] {
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let Some(sp) = piece.path.subpaths.first() else { return [None; 2] };
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let n = sp.segment_count();
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if n == 0 {
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return [None; 2];
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}
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let c = sp.segment(n / 2);
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use kurbo::{ParamCurve as _, ParamCurveDeriv as _};
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let (m, d) = (c.eval(0.5), c.deriv().eval(0.5).to_vec2());
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let len = d.hypot();
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if !(len.is_finite() && len > 0.0) {
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return [None; 2];
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}
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// A little to each side: inside the faces next to it, which share it exactly.
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let off = d.turn_90() * (0.05f64.min(0.05 * c.p0.distance(c.p3)).max(1e-6) / len);
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[m + off, m - off].map(|q| self.region_at(q))
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}
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/// Does line piece `i` run between two of `regions` (an edge that merging or deleting them
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/// removes)?
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pub fn line_between(&self, i: usize, regions: &[usize]) -> bool {
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self.lines.get(i).is_some_and(|(l, _)| self.sides(l).iter().all(|r| r.is_some_and(|r| regions.contains(&r))))
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}
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/// The edges `touched` deletes: those that bound none of its regions (deleting a region takes
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/// its edges with it, so an erase drag that crosses an edge into a region deletes the region).
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pub fn erased_edges(&self, touched: &Touched) -> Vec<usize> {
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let bounds_one = |(e, _): &(po::Shape, Rect)| self.sides(e).iter().any(|r| r.is_some_and(|r| touched.regions.contains(&r)));
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touched.edges.iter().copied().filter(|&k| self.edges.get(k).is_some_and(|e| !bounds_one(e))).collect()
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}
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}
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/// The regions, line pieces and edges a Shape Builder gesture has touched, in the order touched.
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#[derive(Clone, Debug, Default, PartialEq)]
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pub struct Touched {
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pub regions: Vec<usize>,
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pub lines: Vec<usize>,
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pub edges: Vec<usize>,
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}
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impl Touched {
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pub fn add(&mut self, hit: Option<Hit>) {
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let (list, i) = match hit {
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Some(Hit::Region(i)) => (&mut self.regions, i),
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Some(Hit::Line(i)) => (&mut self.lines, i),
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Some(Hit::Edge(i)) => (&mut self.edges, i),
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None => return,
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};
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if !list.contains(&i) {
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list.push(i);
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}
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}
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pub fn is_empty(&self) -> bool {
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self.regions.is_empty() && self.lines.is_empty() && self.edges.is_empty()
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}
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}
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/// Selected roots sorted back → front in document order.
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pub fn sorted_roots(doc: &Document, ids: &[NodeId]) -> Vec<NodeId> {
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let mut v: Vec<(Vec<usize>, NodeId)> = ids.iter().filter_map(|id| doc.index_path(*id).map(|p| (p, *id))).collect();
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v.sort();
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v.dedup_by(|a, b| a.1 == b.1);
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v.into_iter().map(|(_, id)| id).collect()
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}
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/// Sample points along a polyline every `step` units (always including the vertices).
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pub fn sample_polyline(pts: &[Point], step: f64) -> Vec<Point> {
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let mut out = vec![];
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let step = step.max(1e-3);
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for (i, &p) in pts.iter().enumerate() {
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if i > 0 {
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let a = pts[i - 1];
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let n = ((a.distance(p) / step).ceil() as usize).min(4000);
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for k in 1..n {
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out.push(a.lerp(p, k as f64 / n as f64));
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}
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}
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out.push(p);
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}
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out
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}
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/// Diagonal hatch lines filling `path` (the Shape Builder's grey mesh highlight), `gap` apart.
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pub fn hatch(path: &BezPath, gap: f64) -> BezPath {
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let mut out = BezPath::new();
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let b = path.bounding_box();
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if b.width() <= 0.0 || b.height() <= 0.0 {
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return out;
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}
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// Rotate by -45° so the hatch lines become horizontal scanlines.
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let s = std::f64::consts::FRAC_1_SQRT_2;
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let rot = |p: Point| Point::new((p.x + p.y) * s, (p.y - p.x) * s);
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let unrot = |p: Point| Point::new((p.x - p.y) * s, (p.x + p.y) * s);
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let mut edges: Vec<(Point, Point)> = vec![];
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let mut first = Point::ZERO;
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let mut last = Point::ZERO;
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kurbo::flatten(path.iter(), gap.max(1e-3) * 0.1, |el| match el {
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kurbo::PathEl::MoveTo(p) => {
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if last != first {
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edges.push((rot(last), rot(first)));
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}
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first = p;
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last = p;
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}
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kurbo::PathEl::LineTo(p) => {
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edges.push((rot(last), rot(p)));
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last = p;
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}
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kurbo::PathEl::ClosePath => {
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if last != first {
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edges.push((rot(last), rot(first)));
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}
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last = first;
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}
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_ => {}
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});
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if last != first {
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edges.push((rot(last), rot(first)));
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}
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let (mut y0, mut y1) = (f64::INFINITY, f64::NEG_INFINITY);
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for (a, c) in &edges {
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y0 = y0.min(a.y.min(c.y));
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y1 = y1.max(a.y.max(c.y));
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}
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let gap = gap.max((y1 - y0) / 400.0).max(1e-6);
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let mut y = (y0 / gap).floor() * gap + gap * 0.5;
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let mut xs: Vec<f64> = vec![];
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while y < y1 {
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xs.clear();
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for (a, c) in &edges {
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if (a.y <= y) != (c.y <= y) {
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xs.push(a.x + (y - a.y) / (c.y - a.y) * (c.x - a.x));
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}
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}
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xs.sort_by(f64::total_cmp);
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for pair in xs.as_chunks::<2>().0 {
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out.move_to(unrot(Point::new(pair[0], y)));
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out.line_to(unrot(Point::new(pair[1], y)));
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}
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y += gap;
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}
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out
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}
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/// The planar map of the current selection, cached by document identity and selection.
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#[derive(Default)]
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struct RegionCache {
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key: Option<(usize, Vec<NodeId>)>,
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map: BuilderMap,
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/// Live Paint faces (every path an edge, filled or not) rather than Shape Builder regions.
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live: bool,
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/// The map has the Shape Builder's outline edges.
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edges: bool,
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}
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impl RegionCache {
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fn live_paint() -> Self {
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Self { live: true, ..Default::default() }
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}
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/// The map, with the outline edges when `edges` (built the first time they're wanted).
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fn get(&mut self, cx: &ToolContext, edges: bool) -> &BuilderMap {
|
|
let key = (cx.doc as *const Document as usize, cx.selection.objects.clone());
|
|
if self.key.as_ref() != Some(&key) || (edges && !self.edges) {
|
|
let roots = sorted_roots(cx.doc, &cx.selection.objects);
|
|
self.map = if self.live {
|
|
let (shapes, _) = shapes_for(cx.doc, &roots);
|
|
let regions = if shapes.is_empty() { vec![] } else { faces_of(po::live_paint(&shapes).0) };
|
|
BuilderMap { regions, ..Default::default() }
|
|
} else {
|
|
BuilderMap::new(cx.doc, &roots, edges).0
|
|
};
|
|
self.key = Some(key);
|
|
self.edges = edges;
|
|
}
|
|
&self.map
|
|
}
|
|
fn at(&mut self, cx: &ToolContext, p: Point) -> Option<usize> {
|
|
self.get(cx, false).region_at(p)
|
|
}
|
|
}
|
|
|
|
// ---------- Shape Builder ----------
|
|
|
|
/// Shape Builder tool: drag across regions to merge them. Holding Alt (Option) switches to erase
|
|
/// mode while it is held: the pointer shows a minus, what a click or drag would delete highlights in
|
|
/// red, and the gesture deletes the regions it touches, the pieces of open paths and the edges
|
|
/// (outline pieces between the points where paths meet) it passes over.
|
|
#[derive(Default)]
|
|
pub struct ShapeBuilderTool {
|
|
cache: RegionCache,
|
|
hover: Option<Hit>,
|
|
points: Vec<Point>,
|
|
touched: Touched,
|
|
dragging: bool,
|
|
/// Erase mode: Alt held while hovering, or when the drag started.
|
|
alt: bool,
|
|
}
|
|
|
|
/// How close (screen px) the pointer must come to a line piece or an edge to delete it.
|
|
const LINE_TOL_PX: f64 = 4.0;
|
|
|
|
impl ShapeBuilderTool {
|
|
fn line_tol(cx: &ToolContext, alt: bool) -> Option<f64> {
|
|
alt.then(|| cx.tol(LINE_TOL_PX))
|
|
}
|
|
|
|
fn touch(&mut self, cx: &ToolContext, from: Option<Point>, to: Point) {
|
|
let pts = match from {
|
|
Some(a) => sample_polyline(&[a, to], cx.tol(2.0)),
|
|
None => vec![to],
|
|
};
|
|
let tol = Self::line_tol(cx, self.alt);
|
|
let map = self.cache.get(cx, self.alt);
|
|
for p in pts {
|
|
self.touched.add(map.hit(p, tol));
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Tool for ShapeBuilderTool {
|
|
fn id(&self) -> &'static str {
|
|
"shapeBuilder"
|
|
}
|
|
|
|
fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Vec<Action> {
|
|
let p = ev.pos;
|
|
match ev.kind {
|
|
PointerKind::Move => {
|
|
self.alt = ev.mods.alt;
|
|
self.hover = self.cache.get(cx, self.alt).hit(p, Self::line_tol(cx, self.alt));
|
|
vec![]
|
|
}
|
|
PointerKind::Down => {
|
|
if cx.selection.is_empty() {
|
|
return vec![];
|
|
}
|
|
self.dragging = true;
|
|
self.alt = ev.mods.alt;
|
|
self.points = vec![p];
|
|
self.touched = Touched::default();
|
|
self.touch(cx, None, p);
|
|
vec![]
|
|
}
|
|
PointerKind::Drag if self.dragging => {
|
|
let last = self.points.last().copied();
|
|
if last.is_none_or(|q| q.distance(p) >= cx.tol(1.0)) {
|
|
self.touch(cx, last, p);
|
|
self.points.push(p);
|
|
}
|
|
vec![]
|
|
}
|
|
PointerKind::Up if self.dragging => {
|
|
self.dragging = false;
|
|
if self.points.last().is_none_or(|q| *q != p) {
|
|
let last = self.points.last().copied();
|
|
self.touch(cx, last, p);
|
|
self.points.push(p);
|
|
}
|
|
let points = std::mem::take(&mut self.points);
|
|
if std::mem::take(&mut self.touched).is_empty() {
|
|
return vec![];
|
|
}
|
|
self.cache.key = None;
|
|
let roots = sorted_roots(cx.doc, &cx.selection.objects);
|
|
let pts: Vec<Value> = points.iter().map(|q| json!([q.x, q.y])).collect();
|
|
// The mode the drag started in, which its highlight showed.
|
|
let erase = self.alt;
|
|
let mut params = json!({ "ids": json_ids(&roots), "points": pts, "erase": erase });
|
|
if let Some(t) = Self::line_tol(cx, erase) {
|
|
params["tolerance"] = json!(t);
|
|
}
|
|
vec![Action::Exec("shapeBuilder.merge".into(), params)]
|
|
}
|
|
_ => vec![],
|
|
}
|
|
}
|
|
|
|
fn overlays(&self, cx: &ToolContext) -> Vec<Overlay> {
|
|
let mut out = vec![];
|
|
let map = &self.cache.map;
|
|
let color = if self.alt { HIGHLIGHT_RED } else { HATCH };
|
|
let show: Vec<Hit> = if self.dragging {
|
|
let t = &self.touched;
|
|
let regions = t.regions.iter().map(|&i| Hit::Region(i));
|
|
regions.chain(t.lines.iter().map(|&i| Hit::Line(i))).chain(map.erased_edges(t).into_iter().map(Hit::Edge)).collect()
|
|
} else {
|
|
self.hover.into_iter().collect()
|
|
};
|
|
for hit in show {
|
|
match hit {
|
|
Hit::Region(i) => {
|
|
if let Some((_, bp, _)) = map.regions.get(i) {
|
|
out.push(Overlay::Path { path: hatch(bp, cx.tol(4.0)), color, width: 1.0, dashed: false });
|
|
out.push(Overlay::Path { path: bp.clone(), color, width: 1.0, dashed: false });
|
|
}
|
|
}
|
|
Hit::Line(i) | Hit::Edge(i) => {
|
|
let pieces = if matches!(hit, Hit::Line(_)) { &map.lines } else { &map.edges };
|
|
if let Some((l, _)) = pieces.get(i) {
|
|
out.push(Overlay::Path { path: l.path.to_bezpath(), color: HIGHLIGHT_RED, width: 3.0, dashed: false });
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if self.dragging && self.points.len() > 1 {
|
|
let mut bp = BezPath::new();
|
|
bp.move_to(self.points[0]);
|
|
for q in &self.points[1..] {
|
|
bp.line_to(*q);
|
|
}
|
|
out.push(Overlay::Path { path: bp, color, width: 1.0, dashed: false });
|
|
}
|
|
out
|
|
}
|
|
|
|
fn cursor(&self, _cx: &ToolContext, _p: Point, m: Mods) -> Cursor {
|
|
// A drag keeps the mode it started in; hovering follows the key.
|
|
let erase = if self.dragging { self.alt } else { m.alt };
|
|
if erase { Cursor::ShapeBuilderErase } else { Cursor::ShapeBuilder }
|
|
}
|
|
|
|
fn busy(&self) -> bool {
|
|
self.dragging
|
|
}
|
|
}
|
|
|
|
// ---------- Live Paint Bucket ----------
|
|
|
|
/// What the Live Paint tools highlight under the cursor.
|
|
#[derive(Clone, Debug, Default, PartialEq)]
|
|
enum LpHover {
|
|
#[default]
|
|
None,
|
|
/// A face (or edge) of an existing Live Paint group.
|
|
Part(BezPath),
|
|
/// A region of the (not yet live) selection.
|
|
Region(usize),
|
|
}
|
|
|
|
fn lp_hover(cx: &ToolContext, cache: &mut RegionCache, p: Point, edge: bool) -> LpHover {
|
|
if let Some(g) = live_paint_at(cx.doc, p).and_then(|id| cx.doc.node(id)) {
|
|
let part = if edge { edge_near(g, p, cx.tol(4.0)) } else { face_at(g, p) };
|
|
return part.and_then(|n| n.path_data()).map(|pd| LpHover::Part(pd.to_bezpath())).unwrap_or_default();
|
|
}
|
|
if edge {
|
|
// Edges of every Live Paint group near the pointer.
|
|
let mut found = None;
|
|
cx.doc.walk(|n| {
|
|
if is_live_paint(n)
|
|
&& let Some(e) = edge_near(n, p, cx.tol(4.0))
|
|
{
|
|
found = e.path_data().map(|pd| pd.to_bezpath());
|
|
}
|
|
});
|
|
if let Some(bp) = found {
|
|
return LpHover::Part(bp);
|
|
}
|
|
}
|
|
let sel_is_live = cx.selection.objects.iter().any(|id| cx.doc.node(*id).is_some_and(is_live_paint));
|
|
if !sel_is_live && let Some(i) = cache.at(cx, p) {
|
|
return LpHover::Region(i);
|
|
}
|
|
LpHover::None
|
|
}
|
|
|
|
fn lp_overlays(h: &LpHover, cache: &RegionCache) -> Vec<Overlay> {
|
|
match h {
|
|
LpHover::None => vec![],
|
|
LpHover::Part(bp) => vec![Overlay::Path { path: bp.clone(), color: HIGHLIGHT_RED, width: 4.0, dashed: false }],
|
|
LpHover::Region(i) => cache
|
|
.map
|
|
.regions
|
|
.get(*i)
|
|
.map(|(_, bp, _)| vec![Overlay::Path { path: bp.clone(), color: HIGHLIGHT_RED, width: 4.0, dashed: false }])
|
|
.unwrap_or_default(),
|
|
}
|
|
}
|
|
|
|
/// Live Paint Bucket: click fills the face under the cursor with the current fill; Shift-click
|
|
/// paints the nearest edge with the current stroke. Clicking selected ordinary paths makes them a
|
|
/// Live Paint group first.
|
|
pub struct LivePaintBucketTool {
|
|
cache: RegionCache,
|
|
hover: LpHover,
|
|
}
|
|
|
|
impl Default for LivePaintBucketTool {
|
|
fn default() -> Self {
|
|
Self { cache: RegionCache::live_paint(), hover: LpHover::None }
|
|
}
|
|
}
|
|
|
|
impl Tool for LivePaintBucketTool {
|
|
fn id(&self) -> &'static str {
|
|
"livePaintBucket"
|
|
}
|
|
|
|
fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Vec<Action> {
|
|
let p = ev.pos;
|
|
match ev.kind {
|
|
PointerKind::Move => {
|
|
self.hover = lp_hover(cx, &mut self.cache, p, ev.mods.shift);
|
|
vec![]
|
|
}
|
|
PointerKind::Down => {
|
|
self.hover = LpHover::None;
|
|
let point = json!([p.x, p.y]);
|
|
if ev.mods.shift {
|
|
let mut group = live_paint_at(cx.doc, p);
|
|
if group.is_none() {
|
|
cx.doc.walk(|n| {
|
|
if is_live_paint(n) && edge_near(n, p, cx.tol(4.0)).is_some() {
|
|
group = Some(n.id);
|
|
}
|
|
});
|
|
}
|
|
return match group {
|
|
Some(g) => {
|
|
vec![Action::Exec("livePaint.strokeEdge".into(), json!({ "group": g.0, "point": point, "tolerance": cx.tol(4.0) }))]
|
|
}
|
|
None => vec![],
|
|
};
|
|
}
|
|
if let Some(g) = live_paint_at(cx.doc, p) {
|
|
return vec![Action::Exec("livePaint.fill".into(), json!({ "group": g.0, "point": point }))];
|
|
}
|
|
if self.cache.at(cx, p).is_some() {
|
|
self.cache.key = None;
|
|
let roots = sorted_roots(cx.doc, &cx.selection.objects);
|
|
return vec![Action::Exec("livePaint.fill".into(), json!({ "ids": json_ids(&roots), "point": point }))];
|
|
}
|
|
vec![]
|
|
}
|
|
_ => vec![],
|
|
}
|
|
}
|
|
|
|
fn overlays(&self, _cx: &ToolContext) -> Vec<Overlay> {
|
|
lp_overlays(&self.hover, &self.cache)
|
|
}
|
|
|
|
fn cursor(&self, _cx: &ToolContext, _p: Point, _m: Mods) -> Cursor {
|
|
Cursor::Crosshair
|
|
}
|
|
}
|
|
|
|
// ---------- Live Paint Selection ----------
|
|
|
|
/// Live Paint Selection: click selects a face (Shift adds); Alt-click selects an edge.
|
|
pub struct LivePaintSelectionTool {
|
|
cache: RegionCache,
|
|
hover: LpHover,
|
|
}
|
|
|
|
impl Default for LivePaintSelectionTool {
|
|
fn default() -> Self {
|
|
Self { cache: RegionCache::live_paint(), hover: LpHover::None }
|
|
}
|
|
}
|
|
|
|
impl Tool for LivePaintSelectionTool {
|
|
fn id(&self) -> &'static str {
|
|
"livePaintSelection"
|
|
}
|
|
|
|
fn pointer(&mut self, cx: &ToolContext, ev: &PointerEvent) -> Vec<Action> {
|
|
let p = ev.pos;
|
|
match ev.kind {
|
|
PointerKind::Move => {
|
|
self.hover = match lp_hover(cx, &mut self.cache, p, ev.mods.alt) {
|
|
h @ LpHover::Part(_) => h,
|
|
_ => LpHover::None,
|
|
};
|
|
vec![]
|
|
}
|
|
PointerKind::Down => {
|
|
let mut hit = None;
|
|
if let Some(g) = live_paint_at(cx.doc, p).and_then(|id| cx.doc.node(id)) {
|
|
let part = if ev.mods.alt { edge_near(g, p, cx.tol(4.0)) } else { face_at(g, p) };
|
|
hit = part.map(|n| n.id);
|
|
}
|
|
match (hit, ev.mods.shift) {
|
|
(Some(id), true) => vec![Action::Exec("select.toggle".into(), json!({ "id": id.0 }))],
|
|
(Some(id), false) => vec![Action::Exec("select.set".into(), json!({ "ids": [id.0] }))],
|
|
(None, true) => vec![],
|
|
(None, false) => vec![Action::Exec("select.none".into(), json!({}))],
|
|
}
|
|
}
|
|
_ => vec![],
|
|
}
|
|
}
|
|
|
|
fn overlays(&self, _cx: &ToolContext) -> Vec<Overlay> {
|
|
lp_overlays(&self.hover, &self.cache)
|
|
}
|
|
|
|
fn cursor(&self, _cx: &ToolContext, _p: Point, _m: Mods) -> Cursor {
|
|
Cursor::Arrow
|
|
}
|
|
}
|
|
|
|
/// Create a builder-family tool by id (None = not one of ours).
|
|
pub fn create(id: &str) -> Option<Box<dyn Tool>> {
|
|
Some(match id {
|
|
"shapeBuilder" => Box::new(ShapeBuilderTool::default()),
|
|
"livePaintBucket" => Box::new(LivePaintBucketTool::default()),
|
|
"livePaintSelection" => Box::new(LivePaintSelectionTool::default()),
|
|
_ => return None,
|
|
})
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::testutil::*;
|
|
use vectorcraft_doc::{Appearance, Selection};
|
|
use vectorcraft_geom::shapes;
|
|
|
|
fn two_rects() -> (Document, NodeId, NodeId) {
|
|
let mut d = Document::new(500.0, 500.0);
|
|
let l = d.layers[0].id;
|
|
let a = d.alloc_id();
|
|
d.insert(Some(l), 0, Node::path(a, shapes::rectangle(Rect::new(0.0, 0.0, 100.0, 100.0)), Appearance::default_art())).unwrap();
|
|
let b = d.alloc_id();
|
|
d.insert(Some(l), 1, Node::path(b, shapes::rectangle(Rect::new(50.0, 0.0, 150.0, 100.0)), Appearance::default_art())).unwrap();
|
|
(d, a, b)
|
|
}
|
|
|
|
fn ev(kind: PointerKind, x: f64, y: f64) -> PointerEvent {
|
|
PointerEvent::new(kind, x, y)
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_hover_highlights_region() {
|
|
let (d, a, b) = two_rects();
|
|
let mut s = Selection::default();
|
|
s.set([a, b]);
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
assert!(t.pointer(&cx, &ev(PointerKind::Move, 75.0, 50.0)).is_empty());
|
|
let ov = t.overlays(&cx);
|
|
assert_eq!(ov.len(), 2);
|
|
let Overlay::Path { path, .. } = &ov[1] else { panic!() };
|
|
let bb = path.bounding_box();
|
|
assert!((bb.x0 - 50.0).abs() < 1e-6 && (bb.x1 - 100.0).abs() < 1e-6, "{bb:?}");
|
|
t.pointer(&cx, &ev(PointerKind::Move, 400.0, 400.0));
|
|
assert!(t.overlays(&cx).is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_drag_emits_merge() {
|
|
let (d, a, b) = two_rects();
|
|
let mut s = Selection::default();
|
|
s.set([b, a]);
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
t.pointer(&cx, &ev(PointerKind::Down, 25.0, 50.0));
|
|
t.pointer(&cx, &ev(PointerKind::Drag, 75.0, 50.0));
|
|
assert_eq!(t.touched.regions.len(), 2);
|
|
assert!(t.busy());
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Up, 75.0, 50.0));
|
|
let Action::Exec(id, v) = &acts[0] else { panic!("{acts:?}") };
|
|
assert_eq!(id, "shapeBuilder.merge");
|
|
assert_eq!(v["erase"], false);
|
|
assert_eq!(v["ids"], json!([a.0, b.0]), "sorted back to front");
|
|
assert!(v["points"].as_array().unwrap().len() >= 2);
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_alt_drag_erases_and_empty_drag_does_nothing() {
|
|
let (d, a, b) = two_rects();
|
|
let mut s = Selection::default();
|
|
s.set([a, b]);
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
let alt = Mods { alt: true, ..Default::default() };
|
|
t.pointer(&cx, &ev(PointerKind::Down, 125.0, 50.0).with_mods(alt));
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Up, 125.0, 50.0).with_mods(alt));
|
|
let Action::Exec(_, v) = &acts[0] else { panic!() };
|
|
assert_eq!(v["erase"], true);
|
|
t.pointer(&cx, &ev(PointerKind::Down, 300.0, 300.0));
|
|
assert!(t.pointer(&cx, &ev(PointerKind::Up, 300.0, 300.0)).is_empty());
|
|
}
|
|
|
|
/// Squares A (0..100) and B (50..150 both ways), overlapping at a corner, selected.
|
|
fn corner_rects() -> (Document, Selection) {
|
|
let mut d = Document::new(500.0, 500.0);
|
|
let l = d.layers[0].id;
|
|
let mut s = Selection::default();
|
|
for (k, r) in [Rect::new(0.0, 0.0, 100.0, 100.0), Rect::new(50.0, 50.0, 150.0, 150.0)].into_iter().enumerate() {
|
|
let id = d.alloc_id();
|
|
d.insert(Some(l), k, Node::path(id, shapes::rectangle(r), Appearance::default_art())).unwrap();
|
|
s.add(id);
|
|
}
|
|
(d, s)
|
|
}
|
|
|
|
fn colors(ov: &[Overlay]) -> Vec<[u8; 3]> {
|
|
ov.iter().map(|o| if let Overlay::Path { color, .. } = o { *color } else { panic!("{o:?}") }).collect()
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_alt_switches_to_erase_mode_while_held() {
|
|
let (d, s) = corner_rects();
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
let alt = Mods { alt: true, ..Default::default() };
|
|
let at = Point::new(75.0, 75.0);
|
|
// Merge mode: a grey mesh and the plus pointer.
|
|
t.pointer(&cx, &ev(PointerKind::Move, at.x, at.y));
|
|
assert_eq!(colors(&t.overlays(&cx)), [HATCH; 2]);
|
|
assert_eq!(t.cursor(&cx, at, Mods::default()), Cursor::ShapeBuilder);
|
|
// Alt held: what would go highlights red, and the pointer shows a minus.
|
|
t.pointer(&cx, &ev(PointerKind::Move, at.x, at.y).with_mods(alt));
|
|
assert_eq!(colors(&t.overlays(&cx)), [HIGHLIGHT_RED; 2]);
|
|
assert_eq!(t.cursor(&cx, at, alt), Cursor::ShapeBuilderErase);
|
|
// Released: merge mode again.
|
|
t.pointer(&cx, &ev(PointerKind::Move, at.x, at.y));
|
|
assert_eq!(colors(&t.overlays(&cx)), [HATCH; 2]);
|
|
assert_eq!(t.cursor(&cx, at, Mods::default()), Cursor::ShapeBuilder);
|
|
// A drag keeps the mode it started in.
|
|
t.pointer(&cx, &ev(PointerKind::Down, at.x, at.y).with_mods(alt));
|
|
assert_eq!(t.cursor(&cx, at, Mods::default()), Cursor::ShapeBuilderErase);
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Up, at.x, at.y));
|
|
let Action::Exec(_, v) = &acts[0] else { panic!("{acts:?}") };
|
|
assert_eq!(v["erase"], true);
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_alt_on_an_edge_highlights_and_deletes_it() {
|
|
let (d, s) = corner_rects();
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
let alt = Mods { alt: true, ..Default::default() };
|
|
// A's side inside B, between the points where B's outline crosses it.
|
|
t.pointer(&cx, &ev(PointerKind::Move, 101.0, 75.0).with_mods(alt));
|
|
assert!(matches!(t.hover, Some(Hit::Edge(_))), "{:?}", t.hover);
|
|
let ov = t.overlays(&cx);
|
|
let [Overlay::Path { path, color: HIGHLIGHT_RED, width: 3.0, .. }] = ov.as_slice() else { panic!("{ov:?}") };
|
|
assert_eq!(path.bounding_box(), Rect::new(50.0, 50.0, 100.0, 100.0));
|
|
// Without Alt it's the region under the pointer.
|
|
t.pointer(&cx, &ev(PointerKind::Move, 101.0, 75.0));
|
|
assert!(matches!(t.hover, Some(Hit::Region(_))));
|
|
t.pointer(&cx, &ev(PointerKind::Down, 101.0, 75.0).with_mods(alt));
|
|
assert_eq!(t.touched.edges.len(), 1);
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Up, 101.0, 75.0).with_mods(alt));
|
|
let Action::Exec(id, v) = &acts[0] else { panic!("{acts:?}") };
|
|
assert_eq!((id.as_str(), &v["erase"], &v["tolerance"]), ("shapeBuilder.merge", &json!(true), &json!(4.0)));
|
|
}
|
|
|
|
#[test]
|
|
fn shape_builder_erase_drag_into_regions_shows_the_regions_not_the_edges_it_crosses() {
|
|
let (d, s) = corner_rects();
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = ShapeBuilderTool::default();
|
|
let alt = Mods { alt: true, ..Default::default() };
|
|
t.pointer(&cx, &ev(PointerKind::Down, 25.0, 25.0).with_mods(alt));
|
|
t.pointer(&cx, &ev(PointerKind::Drag, 75.0, 75.0).with_mods(alt));
|
|
assert_eq!(t.touched.regions.len(), 2);
|
|
assert!(!t.touched.edges.is_empty(), "the drag crossed B's outline");
|
|
assert!(t.cache.map.erased_edges(&t.touched).is_empty(), "which goes with the regions");
|
|
// Two regions (mesh + outline each) and the drag's trail, all red.
|
|
assert_eq!(colors(&t.overlays(&cx)), [HIGHLIGHT_RED; 5]);
|
|
}
|
|
|
|
#[test]
|
|
fn hatch_stays_inside_region() {
|
|
let bp = shapes::rectangle(Rect::new(0.0, 0.0, 40.0, 20.0)).to_bezpath();
|
|
let h = hatch(&bp, 4.0);
|
|
let bb = h.bounding_box();
|
|
assert!(bb.x0 >= -1e-6 && bb.y0 >= -1e-6 && bb.x1 <= 40.0 + 1e-6 && bb.y1 <= 20.0 + 1e-6);
|
|
assert!(h.elements().len() > 10);
|
|
}
|
|
|
|
fn live_group_doc() -> (Document, NodeId, NodeId, NodeId) {
|
|
let mut d = Document::new(500.0, 500.0);
|
|
let l = d.layers[0].id;
|
|
let f1 = d.alloc_id();
|
|
let f2 = d.alloc_id();
|
|
let e = d.alloc_id();
|
|
let mut face1 = Node::path(f1, shapes::rectangle(Rect::new(0.0, 0.0, 50.0, 50.0)), Appearance::default());
|
|
face1.name = Some(FACE_NAME.into());
|
|
let mut face2 = Node::path(f2, shapes::rectangle(Rect::new(50.0, 0.0, 100.0, 50.0)), Appearance::default());
|
|
face2.name = Some(FACE_NAME.into());
|
|
let mut edge = Node::path(e, shapes::line(Point::new(50.0, 0.0), Point::new(50.0, 50.0)), Appearance::default());
|
|
edge.name = Some(EDGE_NAME.into());
|
|
let gid = d.alloc_id();
|
|
let mut g = Node::group(gid, vec![Arc::new(face1), Arc::new(face2), Arc::new(edge)]);
|
|
g.name = Some(LIVE_PAINT_NAME.into());
|
|
d.insert(Some(l), 0, g).unwrap();
|
|
(d, gid, f2, e)
|
|
}
|
|
|
|
#[test]
|
|
fn bucket_click_fills_face_and_shift_click_strokes_edge() {
|
|
let (d, gid, f2, _e) = live_group_doc();
|
|
assert_eq!(live_paint_at(&d, Point::new(75.0, 25.0)), Some(gid));
|
|
assert_eq!(face_at(d.node(gid).unwrap(), Point::new(75.0, 25.0)).unwrap().id, f2);
|
|
let s = Selection::default();
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = LivePaintBucketTool::default();
|
|
t.pointer(&cx, &ev(PointerKind::Move, 75.0, 25.0));
|
|
let ov = t.overlays(&cx);
|
|
assert!(matches!(&ov[0], Overlay::Path { color: HIGHLIGHT_RED, .. }));
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 75.0, 25.0));
|
|
let Action::Exec(id, v) = &acts[0] else { panic!() };
|
|
assert_eq!(id, "livePaint.fill");
|
|
assert_eq!(v["group"], gid.0);
|
|
let shift = Mods { shift: true, ..Default::default() };
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 51.0, 25.0).with_mods(shift));
|
|
let Action::Exec(id, _) = &acts[0] else { panic!() };
|
|
assert_eq!(id, "livePaint.strokeEdge");
|
|
}
|
|
|
|
#[test]
|
|
fn bucket_on_plain_selection_makes_live_paint() {
|
|
let (d, a, b) = two_rects();
|
|
let mut s = Selection::default();
|
|
s.set([a, b]);
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = LivePaintBucketTool::default();
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 75.0, 50.0));
|
|
let Action::Exec(id, v) = &acts[0] else { panic!() };
|
|
assert_eq!(id, "livePaint.fill");
|
|
assert_eq!(v["ids"], json!([a.0, b.0]));
|
|
}
|
|
|
|
#[test]
|
|
fn live_paint_selection_selects_faces() {
|
|
let (d, _gid, f2, e) = live_group_doc();
|
|
let s = Selection::default();
|
|
let p = paint();
|
|
let cx = cx(&d, &s, &p);
|
|
let mut t = LivePaintSelectionTool::default();
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 75.0, 25.0));
|
|
assert_eq!(acts, vec![Action::Exec("select.set".into(), json!({ "ids": [f2.0] }))]);
|
|
let alt = Mods { alt: true, ..Default::default() };
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 51.0, 25.0).with_mods(alt));
|
|
assert_eq!(acts, vec![Action::Exec("select.set".into(), json!({ "ids": [e.0] }))]);
|
|
let acts = t.pointer(&cx, &ev(PointerKind::Down, 300.0, 300.0));
|
|
assert_eq!(acts, vec![Action::Exec("select.none".into(), json!({}))]);
|
|
}
|
|
|
|
#[test]
|
|
fn create_builds_the_three_tools() {
|
|
for id in ["shapeBuilder", "livePaintBucket", "livePaintSelection"] {
|
|
assert_eq!(create(id).unwrap().id(), id);
|
|
}
|
|
assert!(create("pen").is_none());
|
|
}
|
|
}
|