导检单和加项单PDF加载状态

src/components/exam/ExamSignPanel.tsx

@@ -68,6 +68,11 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
   const [daojiandanSubmitLoading, setDaojiandanSubmitLoading] = useState(false);
   const [daojiandanSubmitMessage, setDaojiandanSubmitMessage] = useState<string | null>(null);
   const [showDaojiandanPreview, setShowDaojiandanPreview] = useState(false);
+  const [daojiandanPdfData, setDaojiandanPdfData] = useState<ArrayBuffer | null>(null);
+  const [daojiandanPdfLoading, setDaojiandanPdfLoading] = useState(false);
+  const [daojiandanPdfReady, setDaojiandanPdfReady] = useState(false);
+  const [daojiandanPdfBlobUrl, setDaojiandanPdfBlobUrl] = useState<string | null>(null);
+  const daojiandanCanvasContainerRef = useRef<HTMLDivElement>(null);
   // 加项单相关状态
   const [addItemBillUrl, setAddItemBillUrl] = useState<string | null>(null);
   const [addItemBillName, setAddItemBillName] = useState<string>('加项单');
@@ -77,6 +82,11 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
   const addItemBillSignaturePadRef = useRef<SignaturePadHandle | null>(null);
   const [addItemBillSubmitLoading, setAddItemBillSubmitLoading] = useState(false);
   const [addItemBillSubmitMessage, setAddItemBillSubmitMessage] = useState<string | null>(null);
+  const [addItemBillPdfData, setAddItemBillPdfData] = useState<ArrayBuffer | null>(null);
+  const [addItemBillPdfLoading, setAddItemBillPdfLoading] = useState(false);
+  const [addItemBillPdfReady, setAddItemBillPdfReady] = useState(false);
+  const [addItemBillPdfBlobUrl, setAddItemBillPdfBlobUrl] = useState<string | null>(null);
+  const addItemBillCanvasContainerRef = useRef<HTMLDivElement>(null);
 
   const busy = signLoading || submitLoading || consentLoading || pdfLoading || daojiandanSubmitLoading || addItemBillSubmitLoading;
 
@@ -453,6 +463,314 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
     renderAllPages();
   }, [pdfData]);
 
+  // 加载导检单 PDF 数据
+  useEffect(() => {
+    if (!showDaojiandanPreview || !daojiandanUrl) {
+      setDaojiandanPdfData(null);
+      setDaojiandanPdfBlobUrl(null);
+      setDaojiandanPdfReady(false);
+      return;
+    }
+
+    let objectUrl: string | null = null;
+    setDaojiandanPdfReady(false);
+    setDaojiandanPdfLoading(true);
+    setDaojiandanPdfData(null);
+
+    fetch(daojiandanUrl)
+      .then((resp) => {
+        if (!resp.ok) throw new Error('获取PDF文件失败');
+        return resp.blob();
+      })
+      .then((blob) => {
+        objectUrl = URL.createObjectURL(blob);
+        setDaojiandanPdfBlobUrl(objectUrl);
+        return blob.arrayBuffer();
+      })
+      .then((arrayBuffer) => {
+        setDaojiandanPdfData(arrayBuffer);
+        setDaojiandanPdfLoading(false);
+      })
+      .catch((err) => {
+        console.error('导检单PDF 拉取失败', err);
+        setDaojiandanPdfLoading(false);
+      });
+
+    return () => {
+      if (objectUrl) {
+        URL.revokeObjectURL(objectUrl);
+      }
+    };
+  }, [showDaojiandanPreview, daojiandanUrl]);
+
+  // 渲染导检单 PDF
+  useEffect(() => {
+    if (!daojiandanPdfData || !daojiandanCanvasContainerRef.current) return;
+
+    setDaojiandanPdfReady(false);
+
+    const renderAllPages = async () => {
+      try {
+        const pdf = await pdfjsLib.getDocument({ data: daojiandanPdfData }).promise;
+
+        if (!daojiandanCanvasContainerRef.current) return;
+
+        // 清空容器
+        daojiandanCanvasContainerRef.current.innerHTML = '';
+
+        const scale = 1.2;
+
+        for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
+          const page = await pdf.getPage(pageNum);
+          const viewport = page.getViewport({ scale });
+
+          const canvas = document.createElement('canvas');
+          const context = canvas.getContext('2d');
+
+          if (!context) continue;
+
+          canvas.height = viewport.height;
+          canvas.width = viewport.width;
+          canvas.style.display = 'block';
+          canvas.style.marginBottom = '10px';
+          canvas.className = 'mx-auto border rounded-lg shadow-sm';
+
+          daojiandanCanvasContainerRef.current.appendChild(canvas);
+
+          const renderContext = {
+            canvasContext: context,
+            viewport: viewport,
+          } as any;
+
+          await page.render(renderContext).promise;
+        }
+
+        setDaojiandanPdfReady(true);
+      } catch (err) {
+        console.error('导检单PDF 渲染失败', err);
+        setDaojiandanPdfLoading(false);
+      }
+    };
+
+    renderAllPages();
+  }, [daojiandanPdfData]);
+
+  // 加载加项单 PDF 数据
+  useEffect(() => {
+    if (!showAddItemBillPreview || !addItemBillUrl) {
+      setAddItemBillPdfData(null);
+      setAddItemBillPdfBlobUrl(null);
+      setAddItemBillPdfReady(false);
+      return;
+    }
+
+    let objectUrl: string | null = null;
+    setAddItemBillPdfReady(false);
+    setAddItemBillPdfLoading(true);
+    setAddItemBillPdfData(null);
+
+    fetch(addItemBillUrl)
+      .then((resp) => {
+        if (!resp.ok) throw new Error('获取PDF文件失败');
+        return resp.blob();
+      })
+      .then((blob) => {
+        objectUrl = URL.createObjectURL(blob);
+        setAddItemBillPdfBlobUrl(objectUrl);
+        return blob.arrayBuffer();
+      })
+      .then((arrayBuffer) => {
+        setAddItemBillPdfData(arrayBuffer);
+        setAddItemBillPdfLoading(false);
+      })
+      .catch((err) => {
+        console.error('加项单PDF 拉取失败', err);
+        setAddItemBillPdfLoading(false);
+      });
+
+    return () => {
+      if (objectUrl) {
+        URL.revokeObjectURL(objectUrl);
+      }
+    };
+  }, [showAddItemBillPreview, addItemBillUrl]);
+
+  // 渲染加项单 PDF
+  useEffect(() => {
+    if (!addItemBillPdfData || !addItemBillCanvasContainerRef.current) return;
+
+    setAddItemBillPdfReady(false);
+
+    const renderAllPages = async () => {
+      try {
+        const pdf = await pdfjsLib.getDocument({ data: addItemBillPdfData }).promise;
+
+        if (!addItemBillCanvasContainerRef.current) return;
+
+        // 清空容器
+        addItemBillCanvasContainerRef.current.innerHTML = '';
+
+        const scale = 1.2;
+
+        for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
+          const page = await pdf.getPage(pageNum);
+          const viewport = page.getViewport({ scale });
+
+          const canvas = document.createElement('canvas');
+          const context = canvas.getContext('2d');
+
+          if (!context) continue;
+
+          canvas.height = viewport.height;
+          canvas.width = viewport.width;
+          canvas.style.display = 'block';
+          canvas.style.marginBottom = '10px';
+          canvas.className = 'mx-auto border rounded-lg shadow-sm';
+
+          addItemBillCanvasContainerRef.current.appendChild(canvas);
+
+          const renderContext = {
+            canvasContext: context,
+            viewport: viewport,
+          } as any;
+
+          await page.render(renderContext).promise;
+        }
+
+        setAddItemBillPdfReady(true);
+      } catch (err) {
+        console.error('加项单PDF 渲染失败', err);
+        setAddItemBillPdfLoading(false);
+      }
+    };
+
+    renderAllPages();
+  }, [addItemBillPdfData]);
+
+  // 导检单预览：使用 pdfjs 渲染到 canvas
+  useEffect(() => {
+    if (!showDaojiandanPreview || !daojiandanUrl || !daojiandanCanvasContainerRef.current) return;
+
+    const container = daojiandanCanvasContainerRef.current;
+    let cancelled = false;
+
+    const renderDaojiandan = async () => {
+      try {
+        setDaojiandanPdfLoading(true);
+        container.innerHTML = '';
+
+        const resp = await fetch(daojiandanUrl);
+        if (!resp.ok) throw new Error('获取PDF文件失败');
+        const blob = await resp.blob();
+        const arrayBuffer = await blob.arrayBuffer();
+
+        const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
+        const scale = 1.2;
+
+        for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
+          if (cancelled) return;
+
+          const page = await pdf.getPage(pageNum);
+          const viewport = page.getViewport({ scale });
+
+          const canvas = document.createElement('canvas');
+          const context = canvas.getContext('2d');
+          if (!context) continue;
+
+          canvas.height = viewport.height;
+          canvas.width = viewport.width;
+          canvas.style.display = 'block';
+          canvas.style.marginBottom = '10px';
+          canvas.className = 'mx-auto border rounded-lg shadow-sm';
+
+          container.appendChild(canvas);
+
+          const renderContext = {
+            canvasContext: context,
+            viewport: viewport,
+          } as any;
+
+          await page.render(renderContext).promise;
+        }
+      } catch (err) {
+        console.error('导检单PDF 渲染失败', err);
+      } finally {
+        if (!cancelled) {
+          setDaojiandanPdfLoading(false);
+        }
+      }
+    };
+
+    renderDaojiandan();
+
+    return () => {
+      cancelled = true;
+      container.innerHTML = '';
+    };
+  }, [showDaojiandanPreview, daojiandanUrl]);
+
+  // 加项单预览：使用 pdfjs 渲染到 canvas
+  useEffect(() => {
+    if (!showAddItemBillPreview || !addItemBillUrl || !addItemBillCanvasContainerRef.current) return;
+
+    const container = addItemBillCanvasContainerRef.current;
+    let cancelled = false;
+
+    const renderAddItemBill = async () => {
+      try {
+        setAddItemBillPdfLoading(true);
+        container.innerHTML = '';
+
+        const resp = await fetch(addItemBillUrl);
+        if (!resp.ok) throw new Error('获取PDF文件失败');
+        const blob = await resp.blob();
+        const arrayBuffer = await blob.arrayBuffer();
+
+        const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
+        const scale = 1.2;
+
+        for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
+          if (cancelled) return;
+
+          const page = await pdf.getPage(pageNum);
+          const viewport = page.getViewport({ scale });
+
+          const canvas = document.createElement('canvas');
+          const context = canvas.getContext('2d');
+          if (!context) continue;
+
+          canvas.height = viewport.height;
+          canvas.width = viewport.width;
+          canvas.style.display = 'block';
+          canvas.style.marginBottom = '10px';
+          canvas.className = 'mx-auto border rounded-lg shadow-sm';
+
+          container.appendChild(canvas);
+
+          const renderContext = {
+            canvasContext: context,
+            viewport: viewport,
+          } as any;
+
+          await page.render(renderContext).promise;
+        }
+      } catch (err) {
+        console.error('加项单PDF 渲染失败', err);
+      } finally {
+        if (!cancelled) {
+          setAddItemBillPdfLoading(false);
+        }
+      }
+    };
+
+    renderAddItemBill();
+
+    return () => {
+      cancelled = true;
+      container.innerHTML = '';
+    };
+  }, [showAddItemBillPreview, addItemBillUrl]);
+
   const handlePrint = () => {
     if (!pdfBlobUrl || !pdfReady || !canvasContainerRef.current) return;
 
@@ -1574,13 +1892,19 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
               </div>
             </div>
             <div className='flex-1 bg-gray-100 overflow-auto'>
-              <div className='flex justify-center p-4'>
-                <iframe
-                  src={daojiandanUrl}
-                  className='w-full h-full min-h-[600px] border rounded-lg bg-white'
-                  title='导检单预览'
-                />
-              </div>
+              {daojiandanPdfLoading ? (
+                <div className='flex items-center justify-center h-full text-white'>
+                  <div>正在加载PDF...</div>
+                </div>
+              ) : daojiandanPdfData ? (
+                <div className='flex justify-center p-4'>
+                  <div ref={daojiandanCanvasContainerRef} className='w-full' />
+                </div>
+              ) : (
+                <div className='flex items-center justify-center h-full text-white'>
+                  <div>PDF加载失败</div>
+                </div>
+              )}
             </div>
           </div>
         )
@@ -1670,13 +1994,19 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
               </div>
             </div>
             <div className='flex-1 bg-gray-100 overflow-auto'>
-              <div className='flex justify-center p-4'>
-                <iframe
-                  src={addItemBillUrl}
-                  className='w-full h-full min-h-[600px] border rounded-lg bg-white'
-                  title='加项单预览'
-                />
-              </div>
+              {addItemBillPdfLoading ? (
+                <div className='flex items-center justify-center h-full text-white'>
+                  <div>正在加载PDF...</div>
+                </div>
+              ) : addItemBillPdfData ? (
+                <div className='flex justify-center p-4'>
+                  <div ref={addItemBillCanvasContainerRef} className='w-full' />
+                </div>
+              ) : (
+                <div className='flex items-center justify-center h-full text-white'>
+                  <div>PDF加载失败</div>
+                </div>
+              )}
             </div>
           </div>
         )