优化预览

src/components/PreviewGrid.tsx

@@ -8,6 +8,8 @@ import {
   buildPrintablePages,
   collectGridCutLinePositions,
   getCutLineChannel,
+  formatCutLineSvgDashArray,
+  getCutLineStrokeWidthMm,
   loadAutoLayoutMinPageMarginMm,
   saveAutoLayoutMinPageMarginMm,
   type PrintableLabel,
@@ -578,15 +580,12 @@ export const LayoutPreview: React.FC<LayoutPreviewProps> = ({
   const rowGapPx = Math.max(0, paper.rowGap * previewScale);
   const labelWPx = template.width * previewScale;
   const labelHPx = template.height * previewScale;
-  const cutStrokeWidth = Math.max(0.5, cutLine.width * previewScale);
+  const cutStrokeWidth = getCutLineStrokeWidthMm(cutLine) * previewScale;
   const cutHalfStroke = cutStrokeWidth / 2;
   const cutChannel = getCutLineChannel(paper.columnGap, paper.rowGap, cutLine);
   const cutChannelXPx = cutChannel.x * previewScale;
   const cutChannelYPx = cutChannel.y * previewScale;
-  const cutDash =
-    cutLine.style === 'dashed'
-      ? `${Math.max(2, cutStrokeWidth * 4)} ${Math.max(2, cutStrokeWidth * 4)}`
-      : undefined;
+  const cutDash = formatCutLineSvgDashArray(cutLine, previewScale);
   const pageCutLines = useMemo(
     () =>
       collectGridCutLinePositions(
@@ -770,7 +769,6 @@ export const LayoutPreview: React.FC<LayoutPreviewProps> = ({
                             strokeWidth={cutStrokeWidth}
                             strokeDasharray={cutDash}
                             strokeLinecap="butt"
-                            shapeRendering="crispEdges"
                           />
                         ))}
                         {pageCutLines.xs.map((x) => (
@@ -784,7 +782,6 @@ export const LayoutPreview: React.FC<LayoutPreviewProps> = ({
                             strokeWidth={cutStrokeWidth}
                             strokeDasharray={cutDash}
                             strokeLinecap="butt"
-                            shapeRendering="crispEdges"
                           />
                         ))}
                       </svg>
@@ -794,7 +791,7 @@ export const LayoutPreview: React.FC<LayoutPreviewProps> = ({
                         return (
                           <div
                             key={cellIdx}
-                            className="bg-white border border-dashed border-gray-200 flex items-center justify-center text-gray-300 font-mono text-[9px] box-border"
+                            className="bg-white flex items-center justify-center text-gray-300 font-mono text-[9px]"
                             style={{
                               width: `${template.width * previewScale}px`,
                               height: `${template.height * previewScale}px`,

src/pdfExport.ts

@@ -1,6 +1,6 @@
 import { jsPDF } from 'jspdf';
 import type { PaperConfig, LabelTemplate, CutLineConfig } from './types';
-import { collectGridCutLinePositions, getCutLineChannel, type PrintableLabel } from './utils';
+import { collectGridCutLinePositions, getCutLineChannel, getCutLineDashSegmentMm, getCutLineStrokeWidthMm, type PrintableLabel } from './utils';
 
 export interface PdfExportProgress {
   done: number;
@@ -51,9 +51,9 @@ function parseColorToRgb(color: string): [number, number, number] {
 function setupCutLinePen(pdf: jsPDF, cutLine: CutLineConfig) {
   const [r, g, b] = parseColorToRgb(cutLine.color);
   pdf.setDrawColor(r, g, b);
-  pdf.setLineWidth(cutLine.width);
+  pdf.setLineWidth(getCutLineStrokeWidthMm(cutLine));
   if (cutLine.style === 'dashed') {
-    const dash = Math.max(0.5, cutLine.width * 4);
+    const dash = getCutLineDashSegmentMm(cutLine);
     pdf.setLineDashPattern([dash, dash], 0);
   } else {
     pdf.setLineDashPattern([], 0);
@@ -71,7 +71,7 @@ function drawPageGridCutLines(
 ) {
   const originX = paper.marginLeft;
   const originY = paper.marginTop;
-  const lineW = Math.max(0.02, cutLine.width);
+  const lineW = getCutLineStrokeWidthMm(cutLine);
   const { xs, ys, gridW, gridH } = collectGridCutLinePositions(
     originX,
     originY,

src/utils.ts

@@ -152,6 +152,27 @@ export const DEFAULT_CUT_LINE_CONFIG: CutLineConfig = {
   color: '#cccccc',
 };
 
+/** 裁切线有效线宽 (mm)，预览与 PDF 共用 */
+export function getCutLineStrokeWidthMm(cutLine: Pick<CutLineConfig, 'width'>): number {
+  return Math.max(0.02, cutLine.width);
+}
+
+/** 虚线单段长度 (mm)，预览与 PDF 共用 */
+export function getCutLineDashSegmentMm(cutLine: Pick<CutLineConfig, 'style' | 'width'>): number {
+  if (cutLine.style !== 'dashed') return 0;
+  return Math.max(0.5, cutLine.width * 4);
+}
+
+/** 预览 SVG strokeDasharray，scale 为 mm→px 比例 */
+export function formatCutLineSvgDashArray(
+  cutLine: Pick<CutLineConfig, 'style' | 'width'>,
+  scale: number
+): string | undefined {
+  if (cutLine.style !== 'dashed') return undefined;
+  const seg = getCutLineDashSegmentMm(cutLine) * scale;
+  return `${seg} ${seg}`;
+}
+
 export interface GridCutLinePositions {
   xs: number[];
   ys: number[];