troy 0.1.3

Superfast primitives and data structures for high frequency trading
Documentation 
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---
import { href, LINKS, NAV } from "@/lib/nav";
import "@/styles/global.css";

interface Props {
  title: string;
  description: string;
}

const { title, description } = Astro.props;
const full = `${title} — troy`;
const canonical = new URL(Astro.url.pathname, Astro.site);

const strip = (path: string) => path.replace(/\/+$/, "") || "/";
const here = strip(Astro.url.pathname);
---

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>{full}</title>
    <meta name="description" content={description} />
    <meta property="og:title" content={full} />
    <meta property="og:description" content={description} />
    <meta property="og:type" content="website" />
    <meta property="og:url" content={canonical} />
    <link rel="canonical" href={canonical} />
    {/* before first paint, so an explicit choice does not flash the other theme */}
    <script is:inline>
      try {
        const saved = localStorage.getItem("troy.theme");
        if (saved) document.documentElement.dataset.theme = saved;
      } catch {}
    </script>
  </head>
  <body>
    <div class="wrap">
      <nav class="top">
        <a class="mark" href={href("")}>troy</a>
        {
          NAV.map((item) => (
            <a
              href={href(item.path)}
              aria-current={strip(href(item.path)) === here ? "page" : undefined}
            >
              {item.label}
            </a>
          ))
        }
        <span class="spacer"></span>
        <span class="divider"></span>
        {
          LINKS.map((link) => (
            <a href={link.href} rel="noopener">
              {link.label}
            </a>
          ))
        }
        <button
          class="theme-toggle"
          type="button"
          aria-label="Switch between light and dark"
        >
          <span aria-hidden="true">◐</span>
        </button>
      </nav>

      <slot />

      <footer>
        Generated from a committed snapshot rather than a CI run: shared runners
        vary by more than the differences measured here. Reproduce with
        <code>make bench-save</code> on your own machine.
        <p class="links">
          {
            LINKS.map((link, index) => (
              <>
                {index > 0 ? " · " : ""}
                <a href={link.href} rel="noopener">
                  {link.label}
                </a>
              </>
            ))
          }
        </p>
      </footer>
    </div>

    <div id="tip" role="status"></div>

    <script>
      // The toggle flips away from whatever is on screen now, so the first
      // press always visibly changes something whichever way the OS leans.
      const root = document.documentElement;
      const toggle = document.querySelector(".theme-toggle");
      toggle?.addEventListener("click", () => {
        const dark =
          root.dataset.theme === "dark" ||
          (!root.dataset.theme &&
            matchMedia("(prefers-color-scheme: dark)").matches);
        const next = dark ? "light" : "dark";
        root.dataset.theme = next;
        try {
          localStorage.setItem("troy.theme", next);
        } catch {}
      });

      // Bar tooltips. Cheap enough to attach unconditionally: a page with no
      // bars matches nothing.
      const tip = document.getElementById("tip");
      if (tip) {
        for (const row of document.querySelectorAll<HTMLElement>(
          ".bar-row[data-tip]",
        )) {
          row.addEventListener("pointerenter", () => {
            tip.innerHTML = row.dataset.tip ?? "";
            tip.style.opacity = "1";
          });
          row.addEventListener("pointermove", (event) => {
            const box = tip.getBoundingClientRect();
            tip.style.left = `${Math.min(event.clientX + 14, innerWidth - box.width - 8)}px`;
            tip.style.top = `${Math.max(event.clientY - box.height - 12, 8)}px`;
          });
          row.addEventListener("pointerleave", () => {
            tip.style.opacity = "0";
          });
        }
      }
    </script>
  </body>
</html>