merman-render 0.5.0

Headless layout + SVG renderer for Mermaid (parity-focused; upstream SVG goldens).
Documentation 
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//! Flowchart v2 delay (half-rounded rectangle) shape.

use std::fmt::Write as _;

use crate::svg::parity::flowchart::escape_attr;
use crate::svg::parity::util;

use super::super::geom::{generate_circle_points, path_from_points};
use super::super::roughjs::roughjs_paths_for_svg_path;

pub(in crate::svg::parity::flowchart::render::node) fn render_delay(
    out: &mut String,
    ctx: &crate::svg::parity::flowchart::types::FlowchartRenderCtx<'_>,
    common: &super::super::FlowchartNodeRenderCommon<'_>,
    label: &super::super::FlowchartNodeLabelState<'_>,
    details: &mut crate::svg::parity::flowchart::types::FlowchartRenderDetails,
) {
    let metrics = super::super::helpers::compute_node_label_metrics(
        ctx,
        Some(common.layout_node),
        label.text,
        label.label_type,
        common.node_classes,
        common.node_styles,
    );

    let p = ctx.node_padding;
    let min_width = 80.0;
    let min_height = 50.0;
    let w = (metrics.width + 2.0 * p).max(min_width);
    let h = (metrics.height + 2.0 * p).max(min_height);
    let radius = h / 2.0;

    let mut points: Vec<(f64, f64)> = Vec::new();
    points.push((-w / 2.0, -h / 2.0));
    points.push((w / 2.0 - radius, -h / 2.0));
    points.extend(generate_circle_points(
        -w / 2.0 + radius,
        0.0,
        radius,
        50,
        90.0,
        270.0,
    ));
    points.push((w / 2.0 - radius, h / 2.0));
    points.push((-w / 2.0, h / 2.0));

    let path_data = path_from_points(&points);
    let (fill_d, stroke_d) =
        super::super::helpers::timed_node_roughjs(common.timing_enabled, details, || {
            roughjs_paths_for_svg_path(
                &path_data,
                common.fill_color,
                common.stroke_color,
                common.stroke_width,
                common.stroke_dasharray,
                common.hand_drawn_seed,
            )
        })
        .unwrap_or_else(|| ("M0,0".to_string(), "M0,0".to_string()));
    let _ = write!(
        out,
        r##"<g class="basic label-container"><path d="{}" stroke="none" stroke-width="0" fill="{}" style="{}"/><path d="{}" stroke="{}" stroke-width="{}" fill="none" stroke-dasharray="{}" style="{}"/></g>"##,
        escape_attr(&fill_d),
        escape_attr(common.fill_color),
        escape_attr(common.style),
        escape_attr(&stroke_d),
        escape_attr(common.stroke_color),
        util::fmt_display(common.stroke_width as f64),
        escape_attr(common.stroke_dasharray),
        escape_attr(common.style),
    );
}