fix:智库报告页面搜索功能修改搜索bug

src/views/thinkTank/reportOriginal/pdf.vue

@@ -47,6 +47,7 @@ export default {
     const searchKey = ref('');
     const matchList = ref([]);
     const matchIdx = ref(0);
+    const pageIndexCache = {};
     // pdfjs 3.x 的 renderTextLayer 在不同入口下导出不一致，这里做一次缓存 + 兜底加载
     const pdfjsApiRef = shallowRef(pdfjsLib);
 
@@ -75,6 +76,12 @@ export default {
         if (!layer) return;
         const rects = layer.querySelectorAll('.highlight-rect');
         rects.forEach(n => n.remove());
+
+        const pageWrap = layer.closest('.page-wrap');
+        if (pageWrap) {
+          const wrapMarks = pageWrap.querySelectorAll('.highlight-rect');
+          wrapMarks.forEach(n => n.remove());
+        }
       });
     };
 
@@ -137,6 +144,14 @@ export default {
             textDivs: [],
             enhanceTextSelection: false
           }).promise;
+        } else if (typeof api?.TextLayer === 'function') {
+          // pdfjs-dist v4/v5：renderTextLayer 已移除，改用 TextLayer.render()
+          const tl = new api.TextLayer({
+            textContentSource: textContent,
+            container: textLayer,
+            viewport
+          });
+          await tl.render();
         }
       } catch (e) {
         console.warn('textLayer 渲染失败', e);
@@ -164,6 +179,7 @@ export default {
       searchKey.value = '';
       renderedPageCount.value = 0;
       resolveRenderAll = null;
+      Object.keys(pageIndexCache).forEach(k => delete pageIndexCache[k]);
 
       try {
         const pdf = await pdfjsLib.getDocument(url).promise;
@@ -192,20 +208,120 @@ export default {
       if (!doc || !key) return;
       // 首次搜索时确保所有页的 textLayer 已渲染完成，避免“越搜越多”
       await waitAllPagesRendered();
+      // textLayer 内 span/布局在渲染 promise resolve 后仍可能有一次 DOM/布局收敛
+      await nextTick();
+      await new Promise((r) => requestAnimationFrame(() => r()));
+      // 重新搜索时 textLayer 可能仍有增量调整；每次搜索都重建页索引，避免数量漂移
+      Object.keys(pageIndexCache).forEach(k => delete pageIndexCache[k]);
+
+      const stripSpaces = (text) => String(text ?? '').replace(/[\s\u00A0\u200B\u200C\u200D\uFEFF]+/g, '');
+
+      const buildPageIndex = (layer) => {
+        const spans = Array.from(layer.querySelectorAll('span'));
+        const ranges = [];
+        let rawText = '';
+        for (const el of spans) {
+          const t = String(el.textContent ?? '');
+          const start = rawText.length;
+          rawText += t;
+          ranges.push({ el, start, end: rawText.length });
+        }
 
-      for (let pageNum = 1; pageNum <= doc.numPages; pageNum++) {
+        // 兜底：去掉空白后的文本 + 位置映射（stripIndex -> rawIndex）
+        const strippedToRawIndex = [];
+        let strippedText = '';
+        for (let i = 0; i < rawText.length; i++) {
+          const ch = rawText[i];
+          if (/[\s\u00A0\u200B\u200C\u200D\uFEFF]/.test(ch)) continue;
+          strippedToRawIndex.push(i);
+          strippedText += ch;
+        }
+
+        const rawToSegments = (rawStart, rawEnd) => {
+          const segs = [];
+          for (const r of ranges) {
+            const segStart = Math.max(rawStart, r.start);
+            const segEnd = Math.min(rawEnd, r.end);
+            if (segStart < segEnd) {
+              segs.push({
+                el: r.el,
+                startIdx: segStart - r.start,
+                endIdx: segEnd - r.start,
+              });
+            }
+          }
+          return segs;
+        };
+
+        return { rawText, strippedText, strippedToRawIndex, rawToSegments };
+      };
+
+      const getOrBuildPageIndex = (pageNum) => {
+        if (pageIndexCache[pageNum]) return pageIndexCache[pageNum];
         const layer = overlayMap[pageNum];
-        if (!layer) continue;
-        const nodes = Array.from(layer.querySelectorAll('span'));
-        for (const el of nodes) {
-          const t = (el.textContent || '');
-          if (!t) continue;
-          let start = 0;
-          while (true) {
-            const idx = t.indexOf(key, start);
-            if (idx === -1) break;
-            matchList.value.push({ pageNum, el, startIdx: idx, endIdx: idx + key.length });
-            start = idx + Math.max(1, key.length);
+        if (!layer) {
+          pageIndexCache[pageNum] = null;
+          return null;
+        }
+        const index = buildPageIndex(layer);
+        pageIndexCache[pageNum] = index;
+        return index;
+      };
+
+      const findAllIndexes = (text, needle) => {
+        const list = [];
+        if (!needle) return list;
+        let from = 0;
+        while (from <= text.length) {
+          const idx = text.indexOf(needle, from);
+          if (idx === -1) break;
+          list.push(idx);
+          from = idx + Math.max(1, needle.length);
+        }
+        return list;
+      };
+
+      for (let pageNum = 1; pageNum <= doc.numPages; pageNum++) {
+        const index = getOrBuildPageIndex(pageNum);
+        const { rawText, strippedText, strippedToRawIndex, rawToSegments } = index
+          ? index
+          : { rawText: '', strippedText: '', strippedToRawIndex: [], rawToSegments: () => [] };
+
+        // 第一优先：原始文本直接匹配（可跨 span）
+        const rawHits = rawText ? findAllIndexes(rawText, key) : [];
+        for (const hit of rawHits) {
+          const segments = rawToSegments(hit, hit + key.length);
+          if (segments.length) matchList.value.push({ pageNum, segments });
+        }
+
+        // 兜底：去空白匹配（常见于 PDF 将单词/中文切成多段并插入空白）
+        if (!rawHits.length && strippedText) {
+          const strippedKey = stripSpaces(key);
+          const strippedHits = findAllIndexes(strippedText, strippedKey);
+          for (const hit of strippedHits) {
+            const rawStart = strippedToRawIndex[hit] ?? 0;
+            const rawEndExclusiveIdx = strippedToRawIndex[Math.min(strippedToRawIndex.length - 1, hit + strippedKey.length - 1)] ?? rawStart;
+            const rawEnd = rawEndExclusiveIdx + 1;
+            const segments = rawToSegments(rawStart, rawEnd);
+            if (segments.length) matchList.value.push({ pageNum, segments });
+          }
+        }
+
+        // 最终兜底：如果该页 textLayer 不可用/为空，直接用 pdf.js 的 textContent 做“页级”检索
+        // 说明：这类命中只能做到定位页码，无法保证精确高亮（因为缺少 span/Range 映射）。
+        if (!rawHits.length && !strippedText) {
+          try {
+            const page = await doc.getPage(pageNum);
+            const tc = await page.getTextContent();
+            const pageText = (tc?.items || []).map(i => String(i?.str ?? '')).join('');
+            if (!pageText) continue;
+            const hasRaw = pageText.includes(key);
+            const hasStripped = stripSpaces(pageText).includes(stripSpaces(key));
+            if (hasRaw || hasStripped) {
+              matchList.value.push({ pageNum, segments: [], fallback: true });
+            }
+          } catch (_) {
+            // ignore
           }
         }
       }
@@ -218,30 +334,57 @@ export default {
       if (idx < 0 || idx >= matchList.value.length) return;
       matchIdx.value = idx;
       const m = matchList.value[idx];
-      const el = m?.el;
+      if (m?.fallback) {
+        // 兜底命中：只定位页码，不做高亮
+        goToPage(m.pageNum);
+        return;
+      }
+      const firstSeg = m?.segments?.[0];
+      const el = firstSeg?.el;
       if (!el) return;
       clearHighlights();
-      // 用 Range 精确计算“子串”在页面上的矩形位置，再画黄色块，避免把整段 span 都标黄
-      const textNode = el.firstChild;
-      if (textNode && textNode.nodeType === Node.TEXT_NODE) {
+      const layer = overlayMap[m.pageNum];
+      if (!layer) return;
+      const pageWrap = layer.closest('.page-wrap');
+
+      // 用 Range 精确计算“子串”在页面上的矩形位置，再画黄色块（支持跨 span）
+      const containerRect = (pageWrap || layer).getBoundingClientRect();
+      const segs = Array.isArray(m?.segments) ? m.segments : [];
+      for (const seg of segs) {
+        const segEl = seg?.el;
+        if (!segEl) continue;
+
+        const textNode = segEl.firstChild;
+        if (!textNode || textNode.nodeType !== Node.TEXT_NODE) continue;
         try {
           const range = document.createRange();
-          range.setStart(textNode, Math.max(0, m.startIdx ?? 0));
-          range.setEnd(textNode, Math.max(0, m.endIdx ?? 0));
+          range.setStart(textNode, Math.max(0, seg.startIdx ?? 0));
+          range.setEnd(textNode, Math.max(0, seg.endIdx ?? 0));
           const rectList = Array.from(range.getClientRects());
-          const pageWrap = el.closest('.page-wrap');
-          const layer = overlayMap[m.pageNum];
-          if (pageWrap && layer && rectList.length) {
-            const pageRect = pageWrap.getBoundingClientRect();
+          if (rectList.length) {
             rectList.forEach(r => {
               const mark = document.createElement('div');
               mark.className = 'highlight-rect';
-              mark.style.left = (r.left - pageRect.left) + 'px';
-              mark.style.top = (r.top - pageRect.top) + 'px';
+              mark.style.zIndex = '5';
+              mark.style.left = (r.left - containerRect.left) + 'px';
+              mark.style.top = (r.top - containerRect.top) + 'px';
               mark.style.width = r.width + 'px';
               mark.style.height = r.height + 'px';
-              layer.appendChild(mark);
+              (pageWrap || layer).appendChild(mark);
             });
+          } else {
+            // Range 兜底为空时：用 span 自身的矩形画块（精度低，但尽量可见）
+            const r = segEl.getBoundingClientRect();
+            if (r.width > 0 && r.height > 0) {
+              const mark = document.createElement('div');
+              mark.className = 'highlight-rect';
+              mark.style.zIndex = '5';
+              mark.style.left = (r.left - containerRect.left) + 'px';
+              mark.style.top = (r.top - containerRect.top) + 'px';
+              mark.style.width = r.width + 'px';
+              mark.style.height = r.height + 'px';
+              (pageWrap || layer).appendChild(mark);
+            }
           }
           range.detach?.();
         } catch (e) {
@@ -358,19 +501,22 @@ canvas {
   color: transparent;
 }
 
-.textLayer :deep(.highlight-text) {
+.textLayer :deep(.highlight-rect) {
+  position: absolute;
   background: #ff0;
   opacity: 0.6;
-  padding: 0 1px;
   border-radius: 2px;
+  pointer-events: none;
+  z-index: 5;
 }
 
-.textLayer :deep(.highlight-rect) {
+.page-wrap :deep(.highlight-rect) {
   position: absolute;
   background: #ff0;
   opacity: 0.6;
   border-radius: 2px;
   pointer-events: none;
+  z-index: 3;
 }
 
 .loading {