feat(font): 新增字体设置并统一医护端与患者端文书字体

2026-09-30 08:35:02 +08:00
parent fe8cb01d4d
commit c2984bfd98
18 changed files with 511 additions and 5 deletions
@@ -0,0 +1,54 @@
+/** Immutable font descriptor shared by clinical and patient document renderers. */
+export interface DocumentFont {
+  id: string;
+  name: string;
+  regularSha256: string;
+  boldSha256: string | null;
+}
+
+const loaded = new Map<string, Promise<string>>();
+
+export function loadDocumentFont(
+  font: DocumentFont | null,
+  apiBase: string,
+): Promise<string> {
+  if (!font) return Promise.resolve("");
+  const key = `${apiBase}:${font.id}:${font.regularSha256}:${font.boldSha256 ?? ""}`;
+  const existing = loaded.get(key);
+  if (existing) return existing;
+  const family = `Medisign-${font.regularSha256}-${font.boldSha256 ?? "regular"}`;
+  const load = async () => {
+    const descriptors = [
+      { sha: font.regularSha256, weight: "400" },
+      { sha: font.boldSha256 ?? font.regularSha256, weight: "700" },
+    ];
+    const faces = await Promise.all(
+      descriptors.map(async ({ sha, weight }) => {
+        const url = `${apiBase.replace(/\/$/, "")}/v1/document-fonts/${encodeURIComponent(font.id)}/${sha}.ttf`;
+        const response = await fetch(url, {
+          signal: AbortSignal.timeout(30000),
+        });
+        if (!response.ok)
+          throw new Error("文书字体加载失败，请重试或联系管理员。");
+        const bytes = await response.arrayBuffer();
+        // The URL names an immutable digest; verify before registering the face.
+        if (globalThis.crypto?.subtle) {
+          const digest = await crypto.subtle.digest("SHA-256", bytes);
+          const actual = Array.from(new Uint8Array(digest), (byte) =>
+            byte.toString(16).padStart(2, "0"),
+          ).join("");
+          if (actual !== sha) throw new Error("文书字体校验失败。");
+        }
+        return new FontFace(family, bytes, { weight }).load();
+      }),
+    );
+    for (const face of faces) document.fonts.add(face);
+    return `"${family}"`;
+  };
+  const promise = load().catch((error: unknown) => {
+    loaded.delete(key);
+    throw error;
+  });
+  loaded.set(key, promise);
+  return promise;
+}