SkyJourney
58f87cc19f
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。
94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
import fs from "node:fs";
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import { serialize } from "node:v8";
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import { createCanvas, loadImage } from "@napi-rs/canvas";
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import { createPdfDocumentSnapshot } from "../packages/document-visual-diff/dist/index.js";
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const [pdfPath, outputPath, sourceJson, dpiText, markersJson] =
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process.argv.slice(2);
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if (!pdfPath || !outputPath || !sourceJson) {
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throw new Error("缺少 PDF 快照 worker 参数");
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}
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const source = JSON.parse(sourceJson);
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const snapshot = await createPdfDocumentSnapshot(fs.readFileSync(pdfPath), {
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source,
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dpi: Number(dpiText || 144)
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});
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const markerDefinitions = JSON.parse(markersJson || "[]");
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const markers = [];
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for (const definition of markerDefinitions) {
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const target = {
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r: Number.parseInt(definition.color.slice(1, 3), 16),
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g: Number.parseInt(definition.color.slice(3, 5), 16),
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b: Number.parseInt(definition.color.slice(5, 7), 16)
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};
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let best;
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for (const page of snapshot.pages) {
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if (!page.raster) {
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continue;
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}
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const image = await loadImage(Buffer.from(page.raster.png));
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const canvas = createCanvas(page.raster.widthPx, page.raster.heightPx);
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const context = canvas.getContext("2d");
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context.drawImage(image, 0, 0);
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const pixels = context.getImageData(
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0,
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0,
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page.raster.widthPx,
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page.raster.heightPx
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).data;
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let count = 0;
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let minX = Number.POSITIVE_INFINITY;
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let minY = Number.POSITIVE_INFINITY;
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let maxX = -1;
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let maxY = -1;
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for (let offset = 0; offset < pixels.length; offset += 4) {
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if (
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Math.abs(pixels[offset] - target.r) <= 12 &&
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Math.abs(pixels[offset + 1] - target.g) <= 12 &&
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Math.abs(pixels[offset + 2] - target.b) <= 12 &&
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pixels[offset + 3] >= 200
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) {
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const pixelIndex = offset / 4;
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const x = pixelIndex % page.raster.widthPx;
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const y = Math.floor(pixelIndex / page.raster.widthPx);
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count += 1;
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minX = Math.min(minX, x);
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minY = Math.min(minY, y);
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maxX = Math.max(maxX, x);
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maxY = Math.max(maxY, y);
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}
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}
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if (!best || count > best.count) {
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best = {
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pageNumber: page.pageNumber,
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pageWidthPt: page.widthPt,
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dpi: page.raster.dpi,
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count,
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minX,
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minY,
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maxX,
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maxY
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};
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}
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}
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if (!best || best.count < 100) {
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throw new Error(`${source.label} 未定位 ${definition.label}`);
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}
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const scale = 72 / best.dpi;
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markers.push({
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id: definition.id,
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label: definition.label,
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pageNumber: best.pageNumber,
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pixelCount: best.count,
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xPt: best.minX * scale,
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yPt: best.minY * scale,
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widthPt: (best.maxX - best.minX + 1) * scale,
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heightPt: (best.maxY - best.minY + 1) * scale,
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centerXPt: ((best.minX + best.maxX + 1) / 2) * scale,
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pageWidthPt: best.pageWidthPt
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});
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}
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fs.writeFileSync(outputPath, serialize({ snapshot, markers }));
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