299 lines
14 KiB
Rust
299 lines
14 KiB
Rust
//! Creating art: shapes, paths, text.
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use drawcraft_doc::{Appearance, CharStyle, LiveShape, Node, NodeKind, TextObject};
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use drawcraft_geom::{Affine, Anchor, AnchorKind, FillRule, PathData, Point, Rect, SubPath, shapes};
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use serde_json::{Value, json};
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use super::*;
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pub fn specs() -> Vec<CommandSpec> {
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vec![
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cmd!("shape.rectangle", "Rectangle", [], None, "{x, y, width, height, radius?: pt} → {id}", has_doc, rectangle),
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cmd!("shape.ellipse", "Ellipse", [], None, "{x, y, width, height} → {id}", has_doc, ellipse),
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cmd!("shape.polygon", "Polygon", [], None, "{cx, cy, radius, sides=6, rotation?: deg} → {id}", has_doc, polygon),
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cmd!("shape.star", "Star", [], None, "{cx, cy, radius1, radius2, points=5, rotation?: deg} → {id}", has_doc, star),
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cmd!("shape.line", "Line Segment", [], None, "{x1, y1, x2, y2} → {id}", has_doc, line),
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cmd!("shape.spiral", "Spiral", [], None, "{cx, cy, radius, decay=80 (%), segments=10, clockwise?} → {id}", has_doc, spiral),
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cmd!("shape.arc", "Arc", [], None, "{x1, y1, x2, y2, closed?} → {id}", has_doc, arc),
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cmd!("shape.rectangularGrid", "Rectangular Grid", [], None, "{x, y, width, height, rows=5, columns=5} → {id}", has_doc, rect_grid),
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cmd!("shape.polarGrid", "Polar Grid", [], None, "{x, y, width, height, concentric=5, radial=5} → {id}", has_doc, polar_grid),
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cmd!(
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"path.create",
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"Create Path",
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[],
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None,
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"{anchors: [{x, y, in?: [x,y], out?: [x,y]}], closed?: bool, d?: SVG path data} → {id}",
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has_doc,
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path_create
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),
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cmd!("view.drawMode", "Drawing Mode", [], Some("Shift+D"), "{mode?: normal|behind|inside} (no param cycles; inside needs one selected path)", has_doc, draw_mode),
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cmd!(
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"text.create",
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"Create Text",
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[],
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None,
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"{x, y, text, size?: pt, font?: family, style?, color?, area?: {width, height}} → {id}",
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has_doc,
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text_create
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),
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]
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}
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/// Insert a new object at the top of the insertion parent with the current paint; select it.
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pub(crate) fn add_art(s: &mut Session, label: &str, kind: NodeKind, name: Option<String>) -> Result<Value> {
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let appearance = Appearance::basic(s.paint.fill.clone(), s.paint.stroke.clone(), s.paint.stroke_width);
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add_node(s, label, kind, appearance, name)
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}
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pub(crate) fn add_node(s: &mut Session, label: &str, kind: NodeKind, appearance: Appearance, name: Option<String>) -> Result<Value> {
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let parent = s.doc()?.insertion_parent();
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let mode = s.draw_mode;
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let inside = s.draw_inside;
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let behind_of = s.doc()?.selection.in_paint_order(&s.doc()?.doc).first().copied();
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let id = s.edit(label, |d, sel| {
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let id = d.alloc_id();
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let mut n = Node::new(id, kind);
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n.appearance = appearance;
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n.name = name;
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match (mode, inside) {
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(crate::DrawMode::Inside, Some(target)) if d.node(target).is_some() => {
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// Wrap the target once in a clip group [mask copy, target, …new art].
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let group = match d.parent_of(target).and_then(|p| d.node(p).map(|pn| (p, pn.kind.clone()))) {
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Some((p, NodeKind::Group { clip: true, children })) if children.get(1).is_some_and(|c| c.id == target) => p,
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_ => {
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let (par, idx, _) = d.position(target).ok_or(crate::EngineError::NoNode(target))?;
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let mut mask = d.node(target).cloned().ok_or(crate::EngineError::NoNode(target))?;
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mask.id = d.alloc_id();
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mask.appearance = Appearance::basic(drawcraft_color::Paint::None, drawcraft_color::Paint::None, 0.0);
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if let NodeKind::Path { clipping, .. } = &mut mask.kind {
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*clipping = true;
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}
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let gid = d.alloc_id();
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d.insert(par, idx + 1, Node::new(gid, NodeKind::Group { children: vec![std::sync::Arc::new(mask)], clip: true }))?;
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d.move_node(target, Some(gid), usize::MAX)?;
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gid
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}
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};
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d.insert(Some(group), usize::MAX, n)?;
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}
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(crate::DrawMode::Behind, _) => match behind_of.and_then(|b| d.position(b)) {
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Some((par, idx, _)) => {
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d.insert(par, idx, n)?;
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}
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None => {
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d.insert(parent, 0, n)?;
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}
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},
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_ => {
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d.insert(parent, usize::MAX, n)?;
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}
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}
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sel.set([id]);
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Ok(id)
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})?;
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Ok(json!({ "id": id.0 }))
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}
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fn draw_mode(s: &mut Session, p: &Value) -> Result<Value> {
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let mode = match str_param(p, "mode") {
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Some("behind") => crate::DrawMode::Behind,
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Some("inside") => crate::DrawMode::Inside,
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Some("normal") => crate::DrawMode::Normal,
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None => match s.draw_mode {
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crate::DrawMode::Normal => crate::DrawMode::Behind,
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crate::DrawMode::Behind if s.doc()?.selection.len() == 1 => crate::DrawMode::Inside,
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_ => crate::DrawMode::Normal,
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},
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Some(o) => return Err(bad("view.drawMode", format!("unknown mode `{o}`"))),
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};
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if mode == crate::DrawMode::Inside {
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let st = s.doc()?;
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let target = st.selection.objects.first().copied().filter(|id| matches!(st.doc.node(*id).map(|n| &n.kind), Some(NodeKind::Path { .. } | NodeKind::Compound { .. } | NodeKind::Text(_))));
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match target {
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Some(t) if st.selection.len() == 1 => s.draw_inside = Some(t),
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_ => return Err(bad("view.drawMode", "Draw Inside needs exactly one selected path, compound path or text")),
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}
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} else {
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s.draw_inside = None;
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}
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s.draw_mode = mode;
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Ok(json!({ "mode": mode }))
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}
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fn path_kind(path: PathData, live: Option<LiveShape>) -> NodeKind {
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NodeKind::Path { path, rule: FillRule::NonZero, live, clipping: false, guide: false }
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}
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fn rect_of(p: &Value, cmd: &str) -> Result<Rect> {
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let x = f64_req(p, "x", cmd)?;
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let y = f64_req(p, "y", cmd)?;
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let w = f64_req(p, "width", cmd)?;
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let h = f64_req(p, "height", cmd)?;
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if !(w.is_finite() && h.is_finite()) {
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return Err(bad(cmd, "invalid size"));
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}
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Ok(Rect::new(x, y, x + w, y + h).abs())
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}
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fn rectangle(s: &mut Session, p: &Value) -> Result<Value> {
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let r = rect_of(p, "shape.rectangle")?;
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let radius = f64_or(p, "radius", 0.0).max(0.0);
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let live = LiveShape::Rectangle { w: r.width(), h: r.height(), radii: [radius; 4], xf: Affine::translate(r.origin().to_vec2()) };
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let label = if radius > 0.0 { "Rounded Rectangle" } else { "Rectangle" };
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add_art(s, label, path_kind(live.to_path(), Some(live)), None)
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}
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fn ellipse(s: &mut Session, p: &Value) -> Result<Value> {
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let r = rect_of(p, "shape.ellipse")?;
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let live = LiveShape::Ellipse { w: r.width(), h: r.height(), pie: (0.0, 360.0), xf: Affine::translate(r.origin().to_vec2()) };
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add_art(s, "Ellipse", path_kind(live.to_path(), Some(live)), None)
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}
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fn polygon(s: &mut Session, p: &Value) -> Result<Value> {
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let c = Point::new(f64_req(p, "cx", "shape.polygon")?, f64_req(p, "cy", "shape.polygon")?);
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let r = f64_req(p, "radius", "shape.polygon")?.abs();
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let sides = p.get("sides").and_then(Value::as_u64).unwrap_or(6).clamp(3, 1000) as u32;
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let rot = f64_or(p, "rotation", 0.0);
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let live = LiveShape::Polygon { radius: r, sides, xf: Affine::translate(c.to_vec2()) * Affine::rotate(rot.to_radians()) };
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add_art(s, "Polygon", path_kind(live.to_path(), Some(live)), None)
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}
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fn star(s: &mut Session, p: &Value) -> Result<Value> {
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let c = Point::new(f64_req(p, "cx", "shape.star")?, f64_req(p, "cy", "shape.star")?);
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let r1 = f64_req(p, "radius1", "shape.star")?.abs();
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let r2 = f64_or(p, "radius2", r1 / 2.0).abs();
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let n = p.get("points").and_then(Value::as_u64).unwrap_or(5).clamp(2, 1000) as u32;
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let path = shapes::star(c, r1, r2, n, f64_or(p, "rotation", 0.0));
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add_art(s, "Star", path_kind(path, None), None)
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}
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fn line(s: &mut Session, p: &Value) -> Result<Value> {
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let a = Point::new(f64_req(p, "x1", "shape.line")?, f64_req(p, "y1", "shape.line")?);
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let b = Point::new(f64_req(p, "x2", "shape.line")?, f64_req(p, "y2", "shape.line")?);
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let live = LiveShape::Line { a, b };
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// Lines are stroked, never filled (Illustrator ignores the fill for new open lines).
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let appearance = Appearance::basic(
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drawcraft_color::Paint::None,
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if s.paint.stroke.is_none() { drawcraft_color::Paint::solid(drawcraft_color::Color::BLACK) } else { s.paint.stroke.clone() },
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s.paint.stroke_width.max(0.1),
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);
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add_node(s, "Line", path_kind(live.to_path(), Some(live)), appearance, None)
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}
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fn spiral(s: &mut Session, p: &Value) -> Result<Value> {
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let c = Point::new(f64_req(p, "cx", "shape.spiral")?, f64_req(p, "cy", "shape.spiral")?);
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let path = shapes::spiral(
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c,
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f64_req(p, "radius", "shape.spiral")?,
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f64_or(p, "decay", 80.0),
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p.get("segments").and_then(Value::as_u64).unwrap_or(10).clamp(2, 1000) as u32,
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bool_or(p, "clockwise", true),
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);
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add_art(s, "Spiral", path_kind(path, None), None)
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}
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fn arc(s: &mut Session, p: &Value) -> Result<Value> {
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let a = Point::new(f64_req(p, "x1", "shape.arc")?, f64_req(p, "y1", "shape.arc")?);
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let b = Point::new(f64_req(p, "x2", "shape.arc")?, f64_req(p, "y2", "shape.arc")?);
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add_art(s, "Arc", path_kind(shapes::arc(a, b, 0.0, bool_or(p, "closed", false)), None), None)
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}
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fn grid_group(s: &mut Session, label: &str, paths: Vec<PathData>) -> Result<Value> {
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let parent = s.doc()?.insertion_parent();
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let ap = Appearance::basic(drawcraft_color::Paint::None, s.paint.stroke.clone(), s.paint.stroke_width);
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let id = s.edit(label, |d, sel| {
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let children = paths
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.into_iter()
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.map(|pd| {
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let id = d.alloc_id();
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std::sync::Arc::new(Node::path(id, pd, ap.clone()))
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})
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.collect();
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let gid = d.alloc_id();
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d.insert(parent, usize::MAX, Node::group(gid, children))?;
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sel.set([gid]);
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Ok(gid)
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})?;
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Ok(json!({ "id": id.0 }))
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}
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fn rect_grid(s: &mut Session, p: &Value) -> Result<Value> {
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let r = rect_of(p, "shape.rectangularGrid")?;
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let rows = p.get("rows").and_then(Value::as_u64).unwrap_or(5).min(999) as u32;
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let cols = p.get("columns").and_then(Value::as_u64).unwrap_or(5).min(999) as u32;
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grid_group(s, "Rectangular Grid", shapes::rectangular_grid(r, rows, cols, true))
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}
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fn polar_grid(s: &mut Session, p: &Value) -> Result<Value> {
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let r = rect_of(p, "shape.polarGrid")?;
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let c = p.get("concentric").and_then(Value::as_u64).unwrap_or(5).min(999) as u32;
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let rad = p.get("radial").and_then(Value::as_u64).unwrap_or(5).min(999) as u32;
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grid_group(s, "Polar Grid", shapes::polar_grid(r, c, rad))
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}
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pub(crate) fn anchor_from_json(v: &Value) -> Option<Anchor> {
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let p = Point::new(v.get("x")?.as_f64()?, v.get("y")?.as_f64()?);
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let h_in = point_param(v, "in").unwrap_or(p);
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let h_out = point_param(v, "out").unwrap_or(p);
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let mut a = Anchor::with_handles(p, h_in, h_out);
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if v.get("smooth").and_then(Value::as_bool) == Some(true) {
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a.kind = AnchorKind::Smooth;
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}
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Some(a)
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}
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fn path_create(s: &mut Session, p: &Value) -> Result<Value> {
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let path = if let Some(d) = str_param(p, "d") {
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let bp = drawcraft_geom::BezPath::from_svg(d).map_err(|e| bad("path.create", format!("bad path data: {e}")))?;
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PathData::from_bezpath(&bp)
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} else {
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let anchors: Vec<Anchor> = p
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.get("anchors")
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.and_then(Value::as_array)
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.ok_or_else(|| bad("path.create", "missing anchors"))?
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.iter()
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.filter_map(anchor_from_json)
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.collect();
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if anchors.is_empty() {
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return Err(bad("path.create", "need at least one anchor"));
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}
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PathData::single(SubPath::new(anchors, bool_or(p, "closed", false)))
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};
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let mut ap = Appearance::basic(s.paint.fill.clone(), s.paint.stroke.clone(), s.paint.stroke_width);
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// Open paths drawn with a stroke of None would be invisible: mimic Illustrator and keep what the user set.
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if !path.is_closed() && ap.stroke_paint().is_none() && ap.fill_paint().is_none() {
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ap.set_stroke(drawcraft_color::Paint::solid(drawcraft_color::Color::BLACK));
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}
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add_node(s, "Pen", path_kind(path, None), ap, None)
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}
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fn text_create(s: &mut Session, p: &Value) -> Result<Value> {
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let x = f64_req(p, "x", "text.create")?;
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let y = f64_req(p, "y", "text.create")?;
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let text = str_param(p, "text").unwrap_or("");
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let mut style = CharStyle::default();
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if let Some(sz) = p.get("size").and_then(Value::as_f64) {
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style.size = sz.clamp(0.1, 1296.0);
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}
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if let Some(f) = str_param(p, "font") {
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style.font_family = f.to_string();
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}
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if let Some(f) = str_param(p, "style") {
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style.font_style = f.to_string();
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}
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style.fill = match p.get("color").and_then(color_value) {
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Some(c) => drawcraft_color::Paint::solid(c),
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None if !s.paint.fill.is_none() && s.paint.fill != drawcraft_color::Paint::solid(drawcraft_color::Color::WHITE) => s.paint.fill.clone(),
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None => drawcraft_color::Paint::solid(drawcraft_color::Color::BLACK),
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};
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let mut t = TextObject::point(Point::new(x, y), text, style);
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if let Some(a) = p.get("area") {
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let w = f64_or(a, "width", 200.0);
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let h = f64_or(a, "height", 100.0);
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t.kind = drawcraft_doc::TextKind::Area { frame: shapes::rectangle(Rect::new(0.0, 0.0, w, h)) };
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}
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let lay = drawcraft_text::layout(drawcraft_text::FontDb::global(), &t);
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t.cached_bounds = Some(lay.bounds);
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add_node(s, "Type", NodeKind::Text(Box::new(t)), Appearance::default(), None)
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}
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