Remove custom Mermaid viewBox fix and switch to unpkg for assets

Switch Mermaid CDN to unpkg and add footer with ICP info
2026-05-21 09:53:42 +08:00
parent 805ad85380
commit fd7946b686
5 changed files with 160 additions and 54 deletions
@@ -0,0 +1,113 @@
+{{- /* Mermaid */ -}}
+
+{{- $mermaidBase := "" -}}
+{{- $useDefaultCdn := true -}}
+{{- with site.Params.mermaid.base -}}
+  {{- $mermaidBase = . -}}
+  {{- $useDefaultCdn = false -}}
+{{- end -}}
+
+{{- $mermaidJsAsset := "" -}}
+{{- with site.Params.mermaid.js -}}
+  {{- $mermaidJsAsset = . -}}
+{{- end -}}
+
+{{- /* If only js is set without base, use local asset loading */ -}}
+{{- if and $useDefaultCdn (ne $mermaidJsAsset "") -}}
+  {{- $useDefaultCdn = false -}}
+{{- end -}}
+
+{{- /* Set default CDN base if needed */ -}}
+{{- if $useDefaultCdn -}}
+  {{- $mermaidBase = "https://cdn.jsdelivr.net/npm/mermaid@latest/dist" -}}
+{{- end -}}
+
+{{- $isRemoteBase := or (strings.HasPrefix $mermaidBase "http://") (strings.HasPrefix $mermaidBase "https://") -}}
+{{- $minSuffix := cond hugo.IsProduction ".min" "" -}}
+
+{{- /* JS retrieval: get raw JS from either local asset or remote, then process */ -}}
+{{- if $isRemoteBase -}}
+  {{- $jsPath := cond (ne $mermaidJsAsset "") $mermaidJsAsset (printf "mermaid%s.js" $minSuffix) -}}
+  {{- $mermaidJsUrl := urls.JoinPath $mermaidBase $jsPath -}}
+  {{- with try (resources.GetRemote $mermaidJsUrl) -}}
+    {{- with .Err -}}
+      {{- errorf "Could not retrieve Mermaid js file from %s. Reason: %s." $mermaidJsUrl . -}}
+    {{- else with .Value -}}
+      {{- with resources.Copy (printf "js/mermaid%s.js" $minSuffix) . -}}
+        {{- $mermaidJs := . | fingerprint -}}
+        <script defer src="{{ $mermaidJs.RelPermalink }}" integrity="{{ $mermaidJs.Data.Integrity }}" crossorigin="anonymous"></script>
+      {{- end -}}
+    {{- end -}}
+  {{- end -}}
+{{- else if $mermaidJsAsset -}}
+  {{- with resources.Get $mermaidJsAsset -}}
+    {{- $mermaidJs := . | fingerprint -}}
+    <script defer src="{{ $mermaidJs.RelPermalink }}" integrity="{{ $mermaidJs.Data.Integrity }}" crossorigin="anonymous"></script>
+  {{- else -}}
+    {{- errorf "Mermaid js asset not found at %q" $mermaidJsAsset -}}
+  {{- end -}}
+{{- end -}}
+
+{{- $lightTheme := site.Params.mermaid.lightTheme | default "neutral" -}}
+{{- $darkTheme  := site.Params.mermaid.darkTheme  | default "dark" -}}
+
+<script>
+  document.addEventListener("DOMContentLoaded", () => {
+    document.querySelectorAll(".mermaid").forEach((el) => {
+      el.dataset.original = el.innerHTML;
+    });
+
+    const isDark = document.documentElement.classList.contains("dark");
+    const theme = isDark ? "{{ $darkTheme }}" : "{{ $lightTheme }}";
+
+    mermaid.initialize({
+      startOnLoad: true,
+      theme: theme,
+      flowchart: { useMaxWidth: true, wrappingWidth: 180 }
+    });
+
+    let timeout;
+    new MutationObserver(() => {
+      clearTimeout(timeout);
+      timeout = setTimeout(() => {
+        const isDark = document.documentElement.classList.contains("dark");
+        const theme = isDark ? "{{ $darkTheme }}" : "{{ $lightTheme }}";
+        document.querySelectorAll(".mermaid").forEach((el) => {
+          el.innerHTML = el.dataset.original;
+          el.removeAttribute("data-processed");
+        });
+        mermaid.initialize({
+          startOnLoad: true,
+          theme: theme,
+          flowchart: { useMaxWidth: true, wrappingWidth: 180 }
+        });
+        mermaid.init();
+        setTimeout(fixViewBox, 600);
+        setTimeout(fixViewBox, 1200);
+      }, 400);
+    }).observe(document.documentElement, {
+      attributes: true,
+      attributeFilter: ["class"],
+    });
+
+    setTimeout(fixViewBox, 600);
+    setTimeout(fixViewBox, 1200);
+
+    function fixViewBox() {
+      document.querySelectorAll(".mermaid svg").forEach(function (svg) {
+        if (svg.getAttribute("aria-roledescription") === "pie") return;
+        var groups = svg.querySelectorAll("g");
+        if (!groups.length) return;
+        var maxX = -Infinity, maxY = -Infinity;
+        groups.forEach(function (g) {
+          var bb = g.getBBox();
+          if (bb.width === 0 || bb.height === 0) return;
+          if (bb.x + bb.width > maxX) maxX = bb.x + bb.width;
+          if (bb.y + bb.height > maxY) maxY = bb.y + bb.height;
+        });
+        if (!isFinite(maxX)) return setTimeout(fixViewBox, 200);
+        svg.setAttribute("viewBox", [-8, -8, maxX + 16, maxY + 16].join(" "));
+      });
+    }
+  });
+</script>