feat: 完成 DOCX R4 元素级视觉门禁

建立 Chromium、Word 与 WPS 的可编辑内容、段落几何、页眉页脚、封面、媒体和逐页视觉比较链路。支持封面独立分节、正文页码重启、主题页边距与横向纸张，并将自然分页差异降为诊断项。修正代码块内边距和折叠表格单元格边框映射，14 套主题生产矩阵与六组布局视觉矩阵通过。
2026-08-02 03:27:11 +08:00
parent f9f5fccfc9
commit 58f87cc19f
100 changed files with 10409 additions and 386 deletions
@@ -0,0 +1,93 @@
+import fs from "node:fs";
+import { serialize } from "node:v8";
+import { createCanvas, loadImage } from "@napi-rs/canvas";
+
+import { createPdfDocumentSnapshot } from "../packages/document-visual-diff/dist/index.js";
+
+const [pdfPath, outputPath, sourceJson, dpiText, markersJson] =
+  process.argv.slice(2);
+if (!pdfPath || !outputPath || !sourceJson) {
+  throw new Error("缺少 PDF 快照 worker 参数");
+}
+
+const source = JSON.parse(sourceJson);
+const snapshot = await createPdfDocumentSnapshot(fs.readFileSync(pdfPath), {
+  source,
+  dpi: Number(dpiText || 144)
+});
+const markerDefinitions = JSON.parse(markersJson || "[]");
+const markers = [];
+for (const definition of markerDefinitions) {
+  const target = {
+    r: Number.parseInt(definition.color.slice(1, 3), 16),
+    g: Number.parseInt(definition.color.slice(3, 5), 16),
+    b: Number.parseInt(definition.color.slice(5, 7), 16)
+  };
+  let best;
+  for (const page of snapshot.pages) {
+    if (!page.raster) {
+      continue;
+    }
+    const image = await loadImage(Buffer.from(page.raster.png));
+    const canvas = createCanvas(page.raster.widthPx, page.raster.heightPx);
+    const context = canvas.getContext("2d");
+    context.drawImage(image, 0, 0);
+    const pixels = context.getImageData(
+      0,
+      0,
+      page.raster.widthPx,
+      page.raster.heightPx
+    ).data;
+    let count = 0;
+    let minX = Number.POSITIVE_INFINITY;
+    let minY = Number.POSITIVE_INFINITY;
+    let maxX = -1;
+    let maxY = -1;
+    for (let offset = 0; offset < pixels.length; offset += 4) {
+      if (
+        Math.abs(pixels[offset] - target.r) <= 12 &&
+        Math.abs(pixels[offset + 1] - target.g) <= 12 &&
+        Math.abs(pixels[offset + 2] - target.b) <= 12 &&
+        pixels[offset + 3] >= 200
+      ) {
+        const pixelIndex = offset / 4;
+        const x = pixelIndex % page.raster.widthPx;
+        const y = Math.floor(pixelIndex / page.raster.widthPx);
+        count += 1;
+        minX = Math.min(minX, x);
+        minY = Math.min(minY, y);
+        maxX = Math.max(maxX, x);
+        maxY = Math.max(maxY, y);
+      }
+    }
+    if (!best || count > best.count) {
+      best = {
+        pageNumber: page.pageNumber,
+        pageWidthPt: page.widthPt,
+        dpi: page.raster.dpi,
+        count,
+        minX,
+        minY,
+        maxX,
+        maxY
+      };
+    }
+  }
+  if (!best || best.count < 100) {
+    throw new Error(`${source.label} 未定位 ${definition.label}`);
+  }
+  const scale = 72 / best.dpi;
+  markers.push({
+    id: definition.id,
+    label: definition.label,
+    pageNumber: best.pageNumber,
+    pixelCount: best.count,
+    xPt: best.minX * scale,
+    yPt: best.minY * scale,
+    widthPt: (best.maxX - best.minX + 1) * scale,
+    heightPt: (best.maxY - best.minY + 1) * scale,
+    centerXPt: ((best.minX + best.maxX + 1) / 2) * scale,
+    pageWidthPt: best.pageWidthPt
+  });
+}
+fs.writeFileSync(outputPath, serialize({ snapshot, markers }));