cadmpeg-ir 0.6.2

CAD data model, validation, diffing, and codec API for cadmpeg.
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// SPDX-License-Identifier: Apache-2.0

use crate::geometry::pcurve::{
    LinePcurve, OffsetPcurve, PcurveGeometry, PlacedPcurve, TrimmedPcurve,
};
use crate::math::Point2;
use crate::transform::Transform2;
use cadmpeg_core::decode::{DecodeArena, DecodeContext, DecodePolicy, ResourceDimension};

fn nested_line() -> PcurveGeometry {
    let line = PcurveGeometry::Line(
        LinePcurve::try_new(Point2::new(1.0, 2.0), Point2::new(3.0, 4.0)).unwrap(),
    );
    let trim =
        PcurveGeometry::Trimmed(TrimmedPcurve::try_new([0.0, 1.0], false, Box::new(line)).unwrap());
    PcurveGeometry::Transformed(
        PlacedPcurve::try_new(
            Box::new(trim),
            Transform2::affine([[2.0, 0.0, 5.0], [0.0, 3.0, 7.0]]).unwrap(),
        )
        .unwrap(),
    )
}

#[test]
fn pcurve_line_parameters_admit_first_later_and_active_session_frames() {
    let geometry = nested_line();
    for (dimension, cap, active) in [
        (ResourceDimension::RecursionDepth, 0, false),
        (ResourceDimension::RecursionDepth, 1, false),
        (ResourceDimension::RecursionDepth, 2, false),
        (ResourceDimension::RecursionDepth, 3, true),
    ] {
        let arena = DecodeArena::new();
        let mut policy = DecodePolicy::service();
        match dimension {
            ResourceDimension::RecursionDepth => policy.limits.max_recursion_depth = cap,
            _ => panic!("test dimension"),
        }
        let (ctx, _) = DecodeContext::from_root_bytes(&[], &arena, &policy).unwrap();
        let caller = active.then(|| ctx.enter_nested_limit("active caller").unwrap());
        let limit = geometry
            .line_parameters(&ctx)
            .expect_err("line walk must refuse");
        assert_eq!(limit.dimension, dimension);
        assert_eq!(
            limit.operation,
            if dimension == ResourceDimension::RecursionDepth {
                "pcurve line parameter nesting"
            } else {
                "pcurve line parameter visit"
            }
        );
        drop(caller);
        assert!(
            matches!(ctx.finish_session(), Err(cadmpeg_core::CodecError::ResourceLimit(original)) if original == limit)
        );
    }
}

#[test]
fn pcurve_line_parameters_preserve_affine_trim_and_non_line_semantics() {
    let arena = DecodeArena::new();
    let mut policy = DecodePolicy::service();
    policy.limits.max_recursion_depth = 3;
    policy.limits.max_retained_bytes = 0;
    let (ctx, _) = DecodeContext::from_root_bytes(&[], &arena, &policy).unwrap();
    assert_eq!(
        nested_line().line_parameters(&ctx).unwrap(),
        Some((Point2::new(7.0, 13.0), Point2::new(6.0, 12.0)))
    );
    let offset =
        PcurveGeometry::Offset(OffsetPcurve::try_new(2.0, Box::new(nested_line())).unwrap());
    assert_eq!(offset.line_parameters(&ctx).unwrap(), None);
    let placed_offset = PcurveGeometry::Transformed(
        PlacedPcurve::try_new(Box::new(offset), Transform2::identity()).unwrap(),
    );
    assert_eq!(placed_offset.line_parameters(&ctx).unwrap(), None);
    ctx.finish_session().unwrap();
}