mirror of
https://github.com/NativeScript/NativeScript.git
synced 2025-11-05 13:26:48 +08:00
Reworked fonts logic
This commit is contained in:
vakrilov
@@ -2,8 +2,14 @@
|
||||
import common = require("./font-common");
|
||||
import fs = require("file-system");
|
||||
import * as traceModule from "trace";
|
||||
|
||||
import * as utils from "utils/utils";
|
||||
import { device } from "platform"
|
||||
|
||||
const EMULATE_OBLIQUE = true;
|
||||
const OBLIQUE_TRANSFORM = CGAffineTransformMake(1, 0, 0.2, 1, 0, 0);
|
||||
const DEFAULT_SERIF = "Times New Roman";
|
||||
const DEFAULT_MONOSPACE = "Courier New";
|
||||
const SUPPORT_FONT_WEIGHTS = parseFloat(device.osVersion) >= 10.0;
|
||||
|
||||
export class Font extends common.Font {
|
||||
public static default = new Font(undefined, undefined, enums.FontStyle.normal, enums.FontWeight.normal);
|
||||
@@ -38,160 +44,18 @@ export class Font extends common.Font {
|
||||
}
|
||||
}
|
||||
|
||||
var areSystemFontSetsValid: boolean = false;
|
||||
export var systemFontFamilies = new Set<string>();
|
||||
export var systemFonts = new Set<string>();
|
||||
|
||||
export function ensureSystemFontSets() {
|
||||
if (areSystemFontSetsValid) {
|
||||
return;
|
||||
}
|
||||
|
||||
var nsFontFamilies = utils.ios.getter(UIFont, UIFont.familyNames);
|
||||
for (var i = 0; i < nsFontFamilies.count; i++) {
|
||||
var family = nsFontFamilies.objectAtIndex(i);
|
||||
systemFontFamilies.add(family);
|
||||
|
||||
var nsFonts = UIFont.fontNamesForFamilyName(family);
|
||||
for (var j = 0; j < nsFonts.count; j++) {
|
||||
var font = nsFonts.objectAtIndex(j);
|
||||
systemFonts.add(font);
|
||||
}
|
||||
}
|
||||
areSystemFontSetsValid = true;
|
||||
function shouldUseSystemFont(fontFamily: string) {
|
||||
return !fontFamily ||
|
||||
fontFamily === common.genericFontFamilies.sansSerif ||
|
||||
fontFamily === common.genericFontFamilies.system;
|
||||
}
|
||||
|
||||
const DEFAULT_SERIF = "Times New Roman";
|
||||
const DEFAULT_MONOSPACE = "Courier New";
|
||||
|
||||
function getFontFamilyRespectingGenericFonts(fontFamily: string): string {
|
||||
if (!fontFamily) {
|
||||
return fontFamily;
|
||||
}
|
||||
|
||||
switch (fontFamily.toLowerCase()) {
|
||||
case common.genericFontFamilies.serif:
|
||||
return DEFAULT_SERIF;
|
||||
|
||||
case common.genericFontFamilies.monospace:
|
||||
return DEFAULT_MONOSPACE;
|
||||
|
||||
default:
|
||||
return fontFamily;
|
||||
}
|
||||
}
|
||||
|
||||
function createUIFont(font: Font, defaultFont: UIFont) {
|
||||
var size = font.fontSize || defaultFont.pointSize;
|
||||
var descriptor: UIFontDescriptor;
|
||||
|
||||
var symbolicTraits: number = 0;
|
||||
if (font.isBold) {
|
||||
symbolicTraits |= UIFontDescriptorSymbolicTraits.TraitBold;
|
||||
}
|
||||
if (font.isItalic) {
|
||||
symbolicTraits |= UIFontDescriptorSymbolicTraits.TraitItalic;
|
||||
}
|
||||
|
||||
descriptor = tryResolveWithSystemFont(font, size, symbolicTraits);
|
||||
|
||||
if (!descriptor) {
|
||||
descriptor = tryResolveByFamily(font);
|
||||
}
|
||||
|
||||
if (!descriptor) {
|
||||
descriptor = utils.ios.getter(defaultFont, defaultFont.fontDescriptor).fontDescriptorWithSymbolicTraits(symbolicTraits);
|
||||
}
|
||||
|
||||
return UIFont.fontWithDescriptorSize(descriptor, size);
|
||||
}
|
||||
|
||||
function tryResolveWithSystemFont(font: Font, size: number, symbolicTraits: number): UIFontDescriptor {
|
||||
var systemFont: UIFont;
|
||||
switch (font.fontFamily) {
|
||||
case common.genericFontFamilies.sansSerif:
|
||||
case common.genericFontFamilies.system:
|
||||
if ((<any>UIFont).systemFontOfSizeWeight) {// This method is available on iOS 8.2 and later.
|
||||
systemFont = (<any>UIFont).systemFontOfSizeWeight(size, getiOSFontWeight(font.fontWeight));
|
||||
}
|
||||
else {
|
||||
systemFont = UIFont.systemFontOfSize(size);
|
||||
}
|
||||
result = utils.ios.getter(systemFont, systemFont.fontDescriptor).fontDescriptorWithSymbolicTraits(symbolicTraits);
|
||||
break;
|
||||
|
||||
case common.genericFontFamilies.monospace:
|
||||
if ((<any>UIFont).monospacedDigitSystemFontOfSizeWeight) {// This method is available on iOS 9.0 and later.
|
||||
systemFont = (<any>UIFont).monospacedDigitSystemFontOfSizeWeight(size, getiOSFontWeight(font.fontWeight));
|
||||
result = utils.ios.getter(systemFont, systemFont.fontDescriptor).fontDescriptorWithSymbolicTraits(symbolicTraits);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (systemFont) {
|
||||
var result = utils.ios.getter(systemFont, systemFont.fontDescriptor).fontDescriptorWithSymbolicTraits(symbolicTraits);
|
||||
return result;
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
function tryResolveByFamily(font: Font): UIFontDescriptor {
|
||||
var fonts = common.parseFontFamily(font.fontFamily);
|
||||
var result: UIFontDescriptor = null;
|
||||
if (fonts.length === 0) {
|
||||
return null;
|
||||
}
|
||||
|
||||
ensureSystemFontSets();
|
||||
|
||||
for (var i = 0; i < fonts.length; i++) {
|
||||
var fontFamily = getFontFamilyRespectingGenericFonts(fonts[i]);
|
||||
var fontFace = getiOSFontFace(fontFamily, font.fontWeight, font.isItalic);
|
||||
if (systemFonts.has(fontFamily) && !fontFace) { // This is an actual font like `HelveticaNeue-UltraLightItalic` - don't apply font face attribute
|
||||
result = UIFontDescriptor.fontDescriptorWithNameSize(fontFamily, 0);
|
||||
}
|
||||
else if (systemFontFamilies.has(fontFamily)) { // This is a font family like `Helvetica Neue` - apply font face attribute
|
||||
result = createFontDescriptor(fontFamily, fontFace);
|
||||
}
|
||||
|
||||
if (result) {
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
function createFontDescriptor(fontFamily: string, fontFace: string): UIFontDescriptor {
|
||||
var fontAttributes = NSMutableDictionary.alloc<string, any>().init();
|
||||
fontAttributes.setObjectForKey(fontFamily, "NSFontFamilyAttribute");
|
||||
if (fontFace) {
|
||||
fontAttributes.setObjectForKey(fontFace, "NSFontFaceAttribute");
|
||||
}
|
||||
return UIFontDescriptor.fontDescriptorWithFontAttributes(fontAttributes);
|
||||
}
|
||||
|
||||
// Available in iOS 8.2 and later.
|
||||
declare var UIFontWeightThin: number; //0.8
|
||||
declare var UIFontWeightUltraLight: number; //0.6
|
||||
declare var UIFontWeightLight: number; //0.4
|
||||
declare var UIFontWeightRegular: number; //0
|
||||
declare var UIFontWeightMedium: number; //0.23
|
||||
declare var UIFontWeightSemibold: number; //0.3
|
||||
declare var UIFontWeightBold: number; //0.4
|
||||
declare var UIFontWeightHeavy: number; //0.56
|
||||
declare var UIFontWeightBlack: number; //0.62
|
||||
function getiOSFontWeight(fontWeight: string): number {
|
||||
if (!(<any>UIFont).systemFontOfSizeWeight) {
|
||||
throw new Error("Font weight is available in iOS 8.2 and later.");
|
||||
}
|
||||
|
||||
function getNativeFontWeight(fontWeight: string): number {
|
||||
switch (fontWeight) {
|
||||
case enums.FontWeight.thin:
|
||||
return UIFontWeightThin;
|
||||
case enums.FontWeight.extraLight:
|
||||
return UIFontWeightUltraLight;
|
||||
case enums.FontWeight.extraLight:
|
||||
return UIFontWeightThin;
|
||||
case enums.FontWeight.light:
|
||||
return UIFontWeightLight;
|
||||
case enums.FontWeight.normal:
|
||||
@@ -215,76 +79,95 @@ function getiOSFontWeight(fontWeight: string): number {
|
||||
}
|
||||
}
|
||||
|
||||
function combineWeightStringWithItalic(weight: string, isItalic: boolean) {
|
||||
if (!isItalic) {
|
||||
return weight;
|
||||
function getFontFamilyRespectingGenericFonts(fontFamily: string): string {
|
||||
if (!fontFamily) {
|
||||
return fontFamily;
|
||||
}
|
||||
|
||||
if (!weight) {
|
||||
return "Italic";
|
||||
switch (fontFamily.toLowerCase()) {
|
||||
case common.genericFontFamilies.serif:
|
||||
return DEFAULT_SERIF;
|
||||
|
||||
case common.genericFontFamilies.monospace:
|
||||
return DEFAULT_MONOSPACE;
|
||||
|
||||
default:
|
||||
return fontFamily;
|
||||
}
|
||||
}
|
||||
|
||||
function getSystemFont(size: number, nativeWeight: number, italic: boolean, symbolicTraits: number): UIFont {
|
||||
let result = UIFont.systemFontOfSizeWeight(size, nativeWeight);
|
||||
if (italic) {
|
||||
let descriptor = utils.ios.getter(result, result.fontDescriptor).fontDescriptorWithSymbolicTraits(symbolicTraits);
|
||||
result = UIFont.fontWithDescriptorSize(descriptor, size);
|
||||
}
|
||||
|
||||
return weight + " Italic";
|
||||
return result;
|
||||
}
|
||||
|
||||
function canLoadFont(fontFamily: string, fontFace: string) {
|
||||
var trialDescriptor = createFontDescriptor(fontFamily, fontFace);
|
||||
var trialFont = UIFont.fontWithDescriptorSize(trialDescriptor, 0);
|
||||
return trialFont.familyName === fontFamily;
|
||||
}
|
||||
function createUIFont(font: Font, defaultFont: UIFont): UIFont {
|
||||
let result: UIFont;
|
||||
const size = font.fontSize || defaultFont.pointSize;
|
||||
const nativeWeight = getNativeFontWeight(font.fontWeight);
|
||||
const fontFamilies = common.parseFontFamily(font.fontFamily);
|
||||
|
||||
function findCorrectWeightString(fontFamily: string, weightStringAlternatives: Array<string>, isItalic: boolean) {
|
||||
var i = 0;
|
||||
let length = weightStringAlternatives.length;
|
||||
for (; i < length; i++) {
|
||||
var possibleFontFace = combineWeightStringWithItalic(weightStringAlternatives[i], isItalic);
|
||||
if (canLoadFont(fontFamily, possibleFontFace)) {
|
||||
return weightStringAlternatives[i];
|
||||
let symbolicTraits: number = 0;
|
||||
if (font.isBold) {
|
||||
symbolicTraits |= UIFontDescriptorSymbolicTraits.TraitBold;
|
||||
}
|
||||
if (font.isItalic) {
|
||||
symbolicTraits |= UIFontDescriptorSymbolicTraits.TraitItalic;
|
||||
}
|
||||
|
||||
let fontDescriptorTraits = {
|
||||
[UIFontSymbolicTrait]: symbolicTraits
|
||||
};
|
||||
|
||||
// IOS versions below 10 will not return the correct font when UIFontWeightTrait is set
|
||||
// In this case - rely on UIFontSymbolicTrait only
|
||||
if (SUPPORT_FONT_WEIGHTS) {
|
||||
fontDescriptorTraits[UIFontWeightTrait] = nativeWeight;
|
||||
}
|
||||
|
||||
for (let i = 0; i < fontFamilies.length; i++) {
|
||||
const fontFamily = getFontFamilyRespectingGenericFonts(fontFamilies[i]);
|
||||
|
||||
if (shouldUseSystemFont(fontFamily)) {
|
||||
result = getSystemFont(size, nativeWeight, font.isItalic, symbolicTraits);
|
||||
break;
|
||||
} else {
|
||||
const fontAttributes = {
|
||||
[UIFontDescriptorFamilyAttribute]: fontFamily,
|
||||
[UIFontDescriptorTraitsAttribute]: fontDescriptorTraits
|
||||
};
|
||||
|
||||
let descriptor = UIFontDescriptor.fontDescriptorWithFontAttributes(<any>fontAttributes);
|
||||
result = UIFont.fontWithDescriptorSize(descriptor, size);
|
||||
|
||||
let actualItalic = utils.ios.getter(result, result.fontDescriptor).symbolicTraits & UIFontDescriptorSymbolicTraits.TraitItalic;
|
||||
if (font.isItalic && !actualItalic && EMULATE_OBLIQUE) {
|
||||
// The font we got is not actually italic so emulate that with a matrix
|
||||
descriptor = descriptor.fontDescriptorWithMatrix(OBLIQUE_TRANSFORM);
|
||||
result = UIFont.fontWithDescriptorSize(descriptor, size);
|
||||
}
|
||||
|
||||
// Check if the resolved font has the correct font-family
|
||||
// If not - fallback to the next font-family
|
||||
if (result.familyName === fontFamily) {
|
||||
break;
|
||||
} else {
|
||||
result = null;
|
||||
}
|
||||
}
|
||||
}
|
||||
return weightStringAlternatives[0];
|
||||
}
|
||||
|
||||
function getiOSFontFace(fontFamily: string, fontWeight: string, isItalic: boolean): string {
|
||||
// ... with a lot of fuzzy logic and artificial intelligence thanks to the lack of font naming standards.
|
||||
var weight: string;
|
||||
switch (fontWeight) {
|
||||
case enums.FontWeight.thin:
|
||||
weight = "Thin";
|
||||
break;
|
||||
case enums.FontWeight.extraLight:
|
||||
weight = findCorrectWeightString(fontFamily, ["Ultra Light", "UltraLight", "Extra Light", "ExtraLight", "Ultra light", "Ultralight", "Extra light", "Extralight"], isItalic);
|
||||
break;
|
||||
case enums.FontWeight.light:
|
||||
weight = "Light";
|
||||
break;
|
||||
case enums.FontWeight.normal:
|
||||
case "400":
|
||||
case undefined:
|
||||
case null:
|
||||
weight = ""; // We dont' need to write Regular
|
||||
break;
|
||||
case enums.FontWeight.medium:
|
||||
weight = "Medium";
|
||||
break;
|
||||
case enums.FontWeight.semiBold:
|
||||
weight = findCorrectWeightString(fontFamily, ["Demi Bold", "DemiBold", "Semi Bold", "SemiBold", "Demi bold", "Demibold", "Semi bold", "Semibold"], isItalic);
|
||||
break;
|
||||
case enums.FontWeight.bold:
|
||||
case "700":
|
||||
weight = "Bold";
|
||||
break;
|
||||
case enums.FontWeight.extraBold:
|
||||
weight = findCorrectWeightString(fontFamily, ["Heavy", "Extra Bold", "ExtraBold", "Extra bold", "Extrabold"], isItalic);
|
||||
break;
|
||||
case enums.FontWeight.black:
|
||||
weight = "Black";
|
||||
break;
|
||||
default:
|
||||
throw new Error(`Invalid font weight: "${fontWeight}"`);
|
||||
// Couldn't resolve font - fallback to the system font
|
||||
if (!result) {
|
||||
result = getSystemFont(size, nativeWeight, font.isItalic, symbolicTraits);
|
||||
}
|
||||
|
||||
return combineWeightStringWithItalic(weight, isItalic);
|
||||
return result;
|
||||
}
|
||||
|
||||
export module ios {
|
||||
@@ -312,8 +195,6 @@ export module ios {
|
||||
trace.write("Error occur while registering font: " + CFErrorCopyDescription(<NSError>error.value), trace.categories.Error, trace.messageType.error);
|
||||
}
|
||||
}
|
||||
|
||||
areSystemFontSetsValid = false;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user