mirror of
https://github.com/NativeScript/NativeScript.git
synced 2025-08-16 03:31:45 +08:00
338 lines
12 KiB
TypeScript
338 lines
12 KiB
TypeScript
import enums = require("ui/enums");
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import common = require("./font-common");
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import fs = require("file-system");
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import * as traceModule from "trace";
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export class Font extends common.Font {
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public static default = new Font(undefined, undefined, enums.FontStyle.normal, enums.FontWeight.normal);
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private _uiFont: UIFont;
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constructor(family: string, size: number, style: string, weight: string) {
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super(family, size, style, weight);
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}
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public getUIFont(defaultFont: UIFont): UIFont {
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if (!this._uiFont) {
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this._uiFont = createUIFont(this, defaultFont);
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}
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return this._uiFont;
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}
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public withFontFamily(family: string): Font {
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return new Font(family, this.fontSize, this.fontStyle, this.fontWeight);
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}
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public withFontStyle(style: string): Font {
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return new Font(this.fontFamily, this.fontSize, style, this.fontWeight);
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}
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public withFontWeight(weight: string): Font {
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return new Font(this.fontFamily, this.fontSize, this.fontStyle, weight);
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}
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public withFontSize(size: number): Font {
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return new Font(this.fontFamily, size, this.fontStyle, this.fontWeight);
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}
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}
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var areSystemFontSetsValid: boolean = false;
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export var systemFontFamilies = new Set<string>();
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export var systemFonts = new Set<string>();
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export function ensureSystemFontSets() {
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if (areSystemFontSetsValid) {
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return;
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}
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var nsFontFamilies = UIFont.familyNames();
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for (var i = 0; i < nsFontFamilies.count; i++) {
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var family = nsFontFamilies.objectAtIndex(i);
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systemFontFamilies.add(family);
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var nsFonts = UIFont.fontNamesForFamilyName(family);
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for (var j = 0; j < nsFonts.count; j++) {
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var font = nsFonts.objectAtIndex(j);
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systemFonts.add(font);
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}
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}
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areSystemFontSetsValid = true;
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}
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const DEFAULT_SERIF = "Times New Roman";
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const DEFAULT_MONOSPACE = "Courier New";
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function getFontFamilyRespectingGenericFonts(fontFamily: string): string {
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if (!fontFamily) {
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return fontFamily;
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}
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switch (fontFamily.toLowerCase()) {
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case common.genericFontFamilies.serif:
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return DEFAULT_SERIF;
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case common.genericFontFamilies.monospace:
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return DEFAULT_MONOSPACE;
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default:
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return fontFamily;
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}
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}
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function createUIFont(font: Font, defaultFont: UIFont) {
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var size = font.fontSize || defaultFont.pointSize;
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var descriptor: UIFontDescriptor;
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var symbolicTraits: number = 0;
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if (font.isBold) {
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symbolicTraits |= UIFontDescriptorSymbolicTraits.UIFontDescriptorTraitBold;
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}
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if (font.isItalic) {
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symbolicTraits |= UIFontDescriptorSymbolicTraits.UIFontDescriptorTraitItalic;
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}
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descriptor = tryResolveWithSystemFont(font, size, symbolicTraits);
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if (!descriptor) {
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descriptor = tryResolveByFamily(font);
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}
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if (!descriptor) {
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descriptor = defaultFont.fontDescriptor().fontDescriptorWithSymbolicTraits(symbolicTraits);
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}
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return UIFont.fontWithDescriptorSize(descriptor, size);
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}
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function tryResolveWithSystemFont(font: Font, size: number, symbolicTraits: number): UIFontDescriptor {
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var systemFont: UIFont;
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switch (font.fontFamily) {
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case common.genericFontFamilies.sansSerif:
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case common.genericFontFamilies.system:
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if ((<any>UIFont).systemFontOfSizeWeight) {// This method is available on iOS 8.2 and later.
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systemFont = (<any>UIFont).systemFontOfSizeWeight(size, getiOSFontWeight(font.fontWeight));
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}
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else {
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systemFont = UIFont.systemFontOfSize(size);
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}
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result = systemFont.fontDescriptor().fontDescriptorWithSymbolicTraits(symbolicTraits);
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break;
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case common.genericFontFamilies.monospace:
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if ((<any>UIFont).monospacedDigitSystemFontOfSizeWeight) {// This method is available on iOS 9.0 and later.
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systemFont = (<any>UIFont).monospacedDigitSystemFontOfSizeWeight(size, getiOSFontWeight(font.fontWeight));
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result = systemFont.fontDescriptor().fontDescriptorWithSymbolicTraits(symbolicTraits);
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}
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break;
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}
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if (systemFont) {
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var result = systemFont.fontDescriptor().fontDescriptorWithSymbolicTraits(symbolicTraits);
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return result;
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}
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return null;
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}
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function tryResolveByFamily(font: Font): UIFontDescriptor {
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var fonts = common.parseFontFamily(font.fontFamily);
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var result: UIFontDescriptor = null;
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if (fonts.length === 0) {
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return null;
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}
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ensureSystemFontSets();
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for (var i = 0; i < fonts.length; i++) {
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var fontFamily = getFontFamilyRespectingGenericFonts(fonts[i]);
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var fontFace = getiOSFontFace(fontFamily, font.fontWeight, font.isItalic);
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if (systemFonts.has(fontFamily) && !fontFace) { // This is an actual font like `HelveticaNeue-UltraLightItalic` - don't apply font face attribute
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result = UIFontDescriptor.fontDescriptorWithNameSize(fontFamily, 0);
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}
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else if (systemFontFamilies.has(fontFamily)) { // This is a font family like `Helvetica Neue` - apply font face attribute
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result = createFontDescriptor(fontFamily, fontFace);
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}
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if (result) {
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return result;
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}
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}
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return null;
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}
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function createFontDescriptor(fontFamily: string, fontFace: string): UIFontDescriptor {
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var fontAttributes = NSMutableDictionary.alloc().init();
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fontAttributes.setObjectForKey(fontFamily, "NSFontFamilyAttribute");
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if (fontFace) {
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fontAttributes.setObjectForKey(fontFace, "NSFontFaceAttribute");
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}
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return UIFontDescriptor.fontDescriptorWithFontAttributes(fontAttributes);
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}
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// Available in iOS 8.2 and later.
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declare var UIFontWeightThin: number; //0.8
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declare var UIFontWeightUltraLight: number; //0.6
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declare var UIFontWeightLight: number; //0.4
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declare var UIFontWeightRegular: number; //0
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declare var UIFontWeightMedium: number; //0.23
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declare var UIFontWeightSemibold: number; //0.3
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declare var UIFontWeightBold: number; //0.4
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declare var UIFontWeightHeavy: number; //0.56
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declare var UIFontWeightBlack: number; //0.62
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function getiOSFontWeight(fontWeight: string): number {
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if (!(<any>UIFont).systemFontOfSizeWeight) {
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throw new Error("Font weight is available in iOS 8.2 and later.");
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}
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switch (fontWeight) {
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case enums.FontWeight.thin:
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return UIFontWeightThin;
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case enums.FontWeight.extraLight:
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return UIFontWeightUltraLight;
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case enums.FontWeight.light:
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return UIFontWeightLight;
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case enums.FontWeight.normal:
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case "400":
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case undefined:
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case null:
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return UIFontWeightRegular;
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case enums.FontWeight.medium:
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return UIFontWeightMedium;
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case enums.FontWeight.semiBold:
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return UIFontWeightSemibold;
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case enums.FontWeight.bold:
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case "700":
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return UIFontWeightBold;
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case enums.FontWeight.extraBold:
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return UIFontWeightHeavy;
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case enums.FontWeight.black:
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return UIFontWeightBlack;
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default:
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throw new Error(`Invalid font weight: "${fontWeight}"`);
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}
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}
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function combineWeightStringWithItalic(weight: string, isItalic: boolean) {
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if (!isItalic) {
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return weight;
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}
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if (!weight) {
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return "Italic";
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}
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return weight + " Italic";
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}
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function canLoadFont(fontFamily: string, fontFace: string) {
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var trialDescriptor = createFontDescriptor(fontFamily, fontFace);
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var trialFont = UIFont.fontWithDescriptorSize(trialDescriptor, 0);
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return trialFont.familyName === fontFamily;
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}
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function findCorrectWeightString(fontFamily: string, weightStringAlternatives: Array<string>, isItalic: boolean) {
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var i = 0;
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let length = weightStringAlternatives.length;
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for (; i < length; i++) {
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var possibleFontFace = combineWeightStringWithItalic(weightStringAlternatives[i], isItalic);
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if (canLoadFont(fontFamily, possibleFontFace)) {
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return weightStringAlternatives[i];
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}
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}
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return weightStringAlternatives[0];
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}
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function getiOSFontFace(fontFamily: string, fontWeight: string, isItalic: boolean): string {
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// ... with a lot of fuzzy logic and artificial intelligence thanks to the lack of font naming standards.
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var weight: string;
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switch (fontWeight) {
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case enums.FontWeight.thin:
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weight = "Thin";
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break;
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case enums.FontWeight.extraLight:
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weight = findCorrectWeightString(fontFamily, ["Ultra Light", "UltraLight", "Extra Light", "ExtraLight", "Ultra light", "Ultralight", "Extra light", "Extralight"], isItalic);
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break;
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case enums.FontWeight.light:
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weight = "Light";
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break;
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case enums.FontWeight.normal:
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case "400":
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case undefined:
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case null:
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weight = ""; // We dont' need to write Regular
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break;
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case enums.FontWeight.medium:
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weight = "Medium";
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break;
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case enums.FontWeight.semiBold:
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weight = findCorrectWeightString(fontFamily, ["Demi Bold", "DemiBold", "Semi Bold", "SemiBold", "Demi bold", "Demibold", "Semi bold", "Semibold"], isItalic);
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break;
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case enums.FontWeight.bold:
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case "700":
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weight = "Bold";
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break;
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case enums.FontWeight.extraBold:
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weight = findCorrectWeightString(fontFamily, ["Heavy", "Extra Bold", "ExtraBold", "Extra bold", "Extrabold"], isItalic);
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break;
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case enums.FontWeight.black:
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weight = "Black";
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break;
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default:
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throw new Error(`Invalid font weight: "${fontWeight}"`);
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}
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return combineWeightStringWithItalic(weight, isItalic);
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}
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export module ios {
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export function registerFont(fontFile: string) {
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var filePath = fs.path.join(fs.knownFolders.currentApp().path, "fonts", fontFile);
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if (!fs.File.exists(filePath)) {
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filePath = fs.path.join(fs.knownFolders.currentApp().path, fontFile);
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}
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var fontData = NSFileManager.defaultManager().contentsAtPath(filePath);
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if (!fontData) {
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throw new Error("Could not load font from: " + fontFile);
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}
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var provider = CGDataProviderCreateWithCFData(fontData);
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var font = CGFontCreateWithDataProvider(provider);
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if (!font) {
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throw new Error("Could not load font from: " + fontFile);
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}
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var error = new interop.Reference();
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if (!CTFontManagerRegisterGraphicsFont(font, error)) {
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var trace: typeof traceModule = require("trace");
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if (trace.enabled) {
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trace.write("Error occur while registering font: " + CFErrorCopyDescription(<NSError>error.value), trace.categories.Error, trace.messageType.error);
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}
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}
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areSystemFontSetsValid = false;
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}
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}
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function registerCustomFonts() {
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var fontsFolderPath = fs.path.join(__dirname.substring(0, __dirname.indexOf("/tns_modules")), "fonts");
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if (fs.Folder.exists(fontsFolderPath)) {
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var fontsFolder = fs.Folder.fromPath(fontsFolderPath);
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var onEachEntityFunc = function (fileEntity: fs.FileSystemEntity): boolean {
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if (fs.Folder.exists(fs.path.join(fontsFolderPath, fileEntity.name))) {
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return true;
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}
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if (fileEntity instanceof fs.File &&
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((<fs.File>fileEntity).extension === ".ttf" || (<fs.File>fileEntity).extension === ".otf")) {
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ios.registerFont(fileEntity.name);
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}
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return true;
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}
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fontsFolder.eachEntity(onEachEntityFunc);
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}
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}
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registerCustomFonts(); |