| 1 | import { Application } from '../application';
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| 2 | import { FontScaleCategory, getClosestValidFontScale } from './font-scale-common';
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| 3 | export * from './font-scale-common';
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| 4 | let currentFontScale = null;
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| 5 | function fontScaleChanged(origFontScale) {
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| 6 | const oldValue = currentFontScale;
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| 7 | currentFontScale = getClosestValidFontScale(origFontScale);
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| 8 | if (oldValue !== currentFontScale) {
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| 9 | Application.notify({
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| 10 | eventName: Application.fontScaleChangedEvent,
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| 11 | object: Application,
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| 12 | newValue: currentFontScale,
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| 13 | });
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| 14 | }
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| 15 | }
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| 16 | export function getCurrentFontScale() {
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| 17 | setupConfigListener();
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| 18 | return currentFontScale;
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| 19 | }
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| 20 | export function getFontScaleCategory() {
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| 21 | if (currentFontScale < 0.85) {
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| 22 | return FontScaleCategory.ExtraSmall;
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| 23 | }
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| 24 | if (currentFontScale > 1.5) {
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| 25 | return FontScaleCategory.ExtraLarge;
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| 26 | }
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| 27 | return FontScaleCategory.Medium;
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| 28 | }
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| 29 | const sizeMap = new Map([
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| 30 | [UIContentSizeCategoryExtraSmall, 0.5],
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| 31 | [UIContentSizeCategorySmall, 0.7],
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| 32 | [UIContentSizeCategoryMedium, 0.85],
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| 33 | [UIContentSizeCategoryLarge, 1],
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| 34 | [UIContentSizeCategoryExtraLarge, 1.15],
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| 35 | [UIContentSizeCategoryExtraExtraLarge, 1.3],
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| 36 | [UIContentSizeCategoryExtraExtraExtraLarge, 1.5],
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| 37 | [UIContentSizeCategoryAccessibilityMedium, 2],
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| 38 | [UIContentSizeCategoryAccessibilityLarge, 2.5],
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| 39 | [UIContentSizeCategoryAccessibilityExtraLarge, 3],
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| 40 | [UIContentSizeCategoryAccessibilityExtraExtraLarge, 3.5],
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| 41 | [UIContentSizeCategoryAccessibilityExtraExtraExtraLarge, 4],
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| 42 | ]);
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| 43 | function contentSizeUpdated(fontSize) {
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| 44 | if (sizeMap.has(fontSize)) {
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| 45 | fontScaleChanged(sizeMap.get(fontSize));
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| 46 | return;
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| 47 | }
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| 48 | fontScaleChanged(1);
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| 49 | }
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| 50 | function useIOSFontScale() {
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| 51 | if (Application.ios.nativeApp) {
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| 52 | contentSizeUpdated(Application.ios.nativeApp.preferredContentSizeCategory);
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| 53 | }
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| 54 | else {
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| 55 | fontScaleChanged(1);
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| 56 | }
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| 57 | }
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| 58 | let fontSizeObserver;
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| 59 | function setupConfigListener(attempt = 0) {
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| 60 | if (fontSizeObserver) {
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| 61 | return;
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| 62 | }
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| 63 | if (!Application.ios.nativeApp) {
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| 64 | if (attempt > 100) {
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| 65 | fontScaleChanged(1);
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| 66 | return;
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| 67 | }
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| 68 |
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| 69 | setTimeout(() => setupConfigListener(attempt + 1), 1);
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| 70 | return;
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| 71 | }
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| 72 | fontSizeObserver = Application.ios.addNotificationObserver(UIContentSizeCategoryDidChangeNotification, (args) => {
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| 73 | const fontSize = args.userInfo.valueForKey(UIContentSizeCategoryNewValueKey);
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| 74 | contentSizeUpdated(fontSize);
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| 75 | });
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| 76 | Application.on(Application.exitEvent, () => {
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| 77 | if (fontSizeObserver) {
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| 78 | Application.ios.removeNotificationObserver(fontSizeObserver, UIContentSizeCategoryDidChangeNotification);
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| 79 | fontSizeObserver = null;
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| 80 | }
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| 81 | Application.off(Application.resumeEvent, useIOSFontScale);
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| 82 | });
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| 83 | Application.on(Application.resumeEvent, useIOSFontScale);
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| 84 | useIOSFontScale();
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| 85 | }
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| 86 | export function initAccessibilityFontScale() {
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| 87 | setupConfigListener();
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| 88 | }
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| 89 | |
| \ | No newline at end of file |