Function getUIFontCached

packages/core/ui/styling/font.ios.ts:26–67

(fontDescriptor: FontDescriptor)

}

function getUIFontCached(fontDescriptor: FontDescriptor) {
	const cacheKey = computeFontCacheKey(fontDescriptor);

	if (uiFontCache.has(cacheKey)) {
		if (Trace.isEnabled()) {
			Trace.write(`UIFont reuse from cache: ${JSON.stringify(fontDescriptor)}, cache size: ${uiFontCache.size}`, Trace.categories.Style, Trace.messageType.info);
		}
		return uiFontCache.get(cacheKey);
	}
	let uiFont = NativeScriptUtils.createUIFont(fontDescriptor as any);
	if (fontDescriptor.fontVariationSettings?.length) {
		let font = CGFontCreateWithFontName(uiFont.fontName);
		const variationAxes: NSArray<NSDictionary<FontVariationAxisType, string | number>> = CGFontCopyVariationAxes(font);
		// This can be null if font doesn't support axes
		if (variationAxes?.count) {
			const variationSettings = NSMutableDictionary.new();
			const variationAxesCount = variationAxes.count;
			const variationAxesNames: string[] = [];

			for (let i = 0, length = variationAxes.count; i < length; i++) {
				variationAxesNames.push(String(variationAxes[i].objectForKey('kCGFontVariationAxisName')));
			}

			for (const variationSetting of fontDescriptor.fontVariationSettings) {
				const axisName = fuzzySearch(variationSetting.axis, variationAxesNames);
				if (axisName?.length) {
					variationSettings.setValueForKey(variationSetting.value, axisName[0]);
				}
			}

			font = CGFontCreateCopyWithVariations(font, variationSettings);
			uiFont = CTFontCreateWithGraphicsFont(font, fontDescriptor.fontSize, null, null);
		}
	}

	uiFontCache.set(cacheKey, uiFont);
	if (Trace.isEnabled()) {
		Trace.write(`UIFont creation: ${JSON.stringify(fontDescriptor)}, cache size: ${uiFontCache.size}`, Trace.categories.Style, Trace.messageType.info);
	}

	return uiFont;
}

export class Font extends FontBase {
	static default = new Font(undefined, undefined);