snapshot of https://github.com/dream-num/univer.git (dev, 2026-09-16; blobs > 131072B omitted)

packages/engine-render/src/components/docs/__tests__/document-compatibility.spec.ts

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+/**
+ * Copyright 2023-present DreamNum Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import type { IDocumentSkeletonBoundingBox, IDocumentSkeletonFontStyle } from '../../../basics/i-document-skeleton-cached';
+import { DocumentFlavor } from '@univerjs/core';
+import { describe, expect, it } from 'vitest';
+import { applyFontMetricCompatibility, getDocumentCompatibilityPolicy } from '../document-compatibility';
+
+const fontStyle = {
+    fontString: 'normal bold 24pt "Calibri", Arial',
+    fontSize: 24,
+    originFontSize: 24,
+    fontFamily: '"Calibri", Arial',
+    fontCache: 'normal bold 24pt "Calibri"',
+} as IDocumentSkeletonFontStyle;
+
+const bBox = {
+    width: 16,
+    ba: 30,
+    bd: 9,
+    aba: 30,
+    abd: 9,
+    sp: 0,
+    sbr: 0.6,
+    sbo: 1,
+    spr: 0.6,
+    spo: 1,
+} as IDocumentSkeletonBoundingBox;
+
+describe('document compatibility policy', () => {
+    it('applies traditional Word font metric width rules without changing modern documents', () => {
+        const traditional = getDocumentCompatibilityPolicy(DocumentFlavor.TRADITIONAL);
+        const modern = getDocumentCompatibilityPolicy(DocumentFlavor.MODERN);
+
+        expect(applyFontMetricCompatibility('5', fontStyle, bBox, traditional).width).toBeCloseTo(14.72);
+        expect(applyFontMetricCompatibility('5', fontStyle, bBox, modern).width).toBe(16);
+    });
+
+    it('scales only non-bold primary Arial Latin glyphs in traditional documents', () => {
+        const normalArial = {
+            ...fontStyle,
+            fontString: 'normal normal 11.5pt Arial',
+            fontSize: 11.5,
+            originFontSize: 11.5,
+            fontFamily: 'Arial',
+            fontCache: 'normal normal 11.5pt Arial',
+        } as IDocumentSkeletonFontStyle;
+        const boldArial = {
+            ...normalArial,
+            fontString: 'normal bold 11.5pt Arial',
+            fontCache: 'normal bold 11.5pt Arial',
+        } as IDocumentSkeletonFontStyle;
+        const browserMeasuredGlyph = { ...bBox, width: 10 };
+        const traditional = getDocumentCompatibilityPolicy(DocumentFlavor.TRADITIONAL);
+        const modern = getDocumentCompatibilityPolicy(DocumentFlavor.MODERN);
+
+        expect(applyFontMetricCompatibility('A', normalArial, browserMeasuredGlyph, traditional).width).toBeCloseTo(9.8);
+        expect(applyFontMetricCompatibility('A', boldArial, browserMeasuredGlyph, traditional).width).toBe(10);
+        expect(applyFontMetricCompatibility('A', normalArial, browserMeasuredGlyph, modern).width).toBe(10);
+        expect(applyFontMetricCompatibility('中', normalArial, browserMeasuredGlyph, traditional).width).toBe(10);
+    });
+
+    it('applies the traditional SimSun width policy when it is the East Asia fallback family', () => {
+        const simSunFallback = {
+            ...fontStyle,
+            fontString: 'normal normal 12pt "Times New Roman", 宋体',
+            fontSize: 12,
+            originFontSize: 12,
+            fontFamily: '"Times New Roman", 宋体',
+            fontCache: 'normal normal 12pt "Times New Roman", 宋体',
+        } as IDocumentSkeletonFontStyle;
+        const traditional = getDocumentCompatibilityPolicy(DocumentFlavor.TRADITIONAL);
+
+        expect(applyFontMetricCompatibility('中', simSunFallback, { ...bBox, width: 10 }, traditional).width)
+            .toBeCloseTo(9.7);
+    });
+});