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feat(font): extend font declaration (#66)
* create font face declarations and extract font faces from text document
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| import { FontFace, FontPitch } from '../style'; | ||
| import { FontFaceDeclarations } from './FontFaceDeclarations'; | ||
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| describe(FontFaceDeclarations.name, () => { | ||
| const testFontFamily = 'someFontFamily'; | ||
| const testFontName = 'someFontName'; | ||
| const testFontPitch = FontPitch.Variable; | ||
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| let fontFaceDeclarations: FontFaceDeclarations; | ||
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| beforeEach(() => { | ||
| fontFaceDeclarations = new FontFaceDeclarations(); | ||
| }); | ||
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| describe('font face', () => { | ||
| it('return an empty list by default', () => { | ||
| const fonts = fontFaceDeclarations.getAll(); | ||
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| expect(fonts).toEqual([]); | ||
| }); | ||
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| it('create and return new font', () => { | ||
| const font = fontFaceDeclarations.create(testFontName, testFontFamily, testFontPitch); | ||
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| expect(font).toBeInstanceOf(FontFace); | ||
| expect(font.getFontFamily()).toBe(testFontFamily); | ||
| expect(font.getFontPitch()).toBe(testFontPitch); | ||
| expect(font.getName()).toBe(testFontName); | ||
| }); | ||
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| it('create a font only once', () => { | ||
| const font1 = fontFaceDeclarations.create(testFontName); | ||
| const font2 = fontFaceDeclarations.create(testFontName); | ||
| const fonts = fontFaceDeclarations.getAll(); | ||
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| expect(font1).toBe(font2); | ||
| expect(fonts.length).toBe(1); | ||
| expect(fonts[0]).toBe(font1); | ||
| }); | ||
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| it('get previously created font', () => { | ||
| const font1 = fontFaceDeclarations.create(testFontName); | ||
| const font2 = fontFaceDeclarations.get(testFontName); | ||
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| expect(font1).toBe(font2); | ||
| }); | ||
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| it('return undefined if unknown font is requested', () => { | ||
| fontFaceDeclarations.create(testFontName); | ||
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| const font = fontFaceDeclarations.get('unknownFontName'); | ||
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| expect(font).toBeUndefined(); | ||
| }); | ||
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| it('delete font', () => { | ||
| fontFaceDeclarations.create(testFontName); | ||
| expect(fontFaceDeclarations.getAll().length).toBe(1); | ||
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| fontFaceDeclarations.delete(testFontName); | ||
| expect(fontFaceDeclarations.getAll().length).toBe(0); | ||
| }); | ||
| }); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import { FontFace, FontPitch } from '../style'; | ||
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| /** | ||
| * This class contains all font face declarations of a document. | ||
| * | ||
| * It is used to manage the fonts that are used in the document. | ||
| * | ||
| * @example | ||
| * document.getFontFaceDeclarations() | ||
| * .create('FreeSans', 'FreeSans', FontPitch.Variable); | ||
| * | ||
| * @since 0.8.0 | ||
| */ | ||
| export class FontFaceDeclarations { | ||
| private readonly fontFaces: Map<string, FontFace> = new Map(); | ||
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| /** | ||
| * Creates a {@link FontFace} object with the given name. | ||
| * If a font with this name already exists, the existing font will be returned. | ||
| * | ||
| * @example | ||
| * const fontFaceDeclarations = new FontFaceDeclarations(); | ||
| * fontFaceDeclarations.create('FreeSans', 'FreeSans', FontPitch.Variable); | ||
| * | ||
| * @param {string} name The unique name for the font | ||
| * @param {string} [fontFamily] The name of the font family | ||
| * @param {FontPitch} [fontPitch] Indicator whether the font has a fixed or variable width | ||
| * @returns {FontFace} A new `FontFace` object with the specified properties | ||
| * or an existing font face, if one with the specified name exists | ||
| * @since 0.8.0 | ||
| */ | ||
| public create (name: string, fontFamily?: string, fontPitch?: FontPitch): FontFace { | ||
| let fontFace = this.fontFaces.get(name); | ||
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| if (fontFace !== undefined) { | ||
| return fontFace; | ||
| } | ||
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| fontFace = new FontFace(name, fontFamily, fontPitch); | ||
| this.fontFaces.set(name, fontFace); | ||
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| return fontFace; | ||
| } | ||
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| /** | ||
| * The `get()` method returns a specified element from a Map object. | ||
| * | ||
| * @example | ||
| * const fontFaceDeclarations = new FontFaceDeclarations(); | ||
| * fontFaceDeclarations.create('FreeSans'); | ||
| * fontFaceDeclarations.get('UnknownFont'); // undefined | ||
| * fontFaceDeclarations.get('FreeSans'); // FreeSans font | ||
| * | ||
| * @param {string} name The name of the requested font | ||
| * @returns {FontFace | undefined} The `FontFace` object associated with the specified name | ||
| * or `undefined` if there is no font with this name | ||
| * @since 0.8.0 | ||
| */ | ||
| public get (name: string): FontFace | undefined { | ||
| return this.fontFaces.get(name); | ||
| } | ||
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| /** | ||
| * The `getAll()` method returns a new `Array` object that contains the fonts of the document. | ||
| * | ||
| * @example | ||
| * const fontFaceDeclarations = new FontFaceDeclarations(); | ||
| * fontFaceDeclarations.create('FreeSans'); | ||
| * fontFaceDeclarations.create('Symbol'); | ||
| * fontFaceDeclarations.getAll(); // [FreeSans, Symbol] | ||
| * | ||
| * @returns {FontFace[]} A new `Array` object that contains the fonts of the document | ||
| * @since 0.8.0 | ||
| */ | ||
| public getAll (): FontFace[] { | ||
| return [...this.fontFaces.values()]; | ||
| } | ||
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| /** | ||
| * The `delete()` method removes the specified font from the font face declarations. | ||
| * | ||
| * @example | ||
| * var myMap = new Map(); | ||
| * const fontFaceDeclarations = new FontFaceDeclarations(); | ||
| * fontFaceDeclarations.create('FreeSans'); | ||
| * fontFaceDeclarations.create('Symbol'); | ||
| * fontFaceDeclarations.delete('FreeSans'); | ||
| * fontFaceDeclarations.get('FreeSans'); // undefined | ||
| * | ||
| * @param {string} name The name of the font to remove from the font face declarations | ||
| * @returns {Meta} The `Meta` object | ||
| * @since 0.8.0 | ||
| */ | ||
| public delete (name: string): FontFaceDeclarations { | ||
| this.fontFaces.delete(name); | ||
|
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| return this; | ||
| } | ||
| } |
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