mirror of
https://github.com/Smaug123/KaTeX
synced 2025-10-07 20:28:38 +00:00
d1c0468ef8
* Reorganize some glyphs * Remove mathdefault Numerals are textord and it was never reachable. * Use PUA for \imath and \jmath * Update katex-fonts * Update tests * Update src/buildCommon.js * Update screenshots * Add comment regarding usage of PUA in \imath and \jmath * Update fonts Co-authored-by: Erik Demaine <edemaine@mit.edu>
111 lines
4.6 KiB
JavaScript
111 lines
4.6 KiB
JavaScript
// @flow
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/**
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* This file provides support for Unicode range U+1D400 to U+1D7FF,
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* Mathematical Alphanumeric Symbols.
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*
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* Function wideCharacterFont takes a wide character as input and returns
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* the font information necessary to render it properly.
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*/
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import type {Mode} from "./types";
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import ParseError from "./ParseError";
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/**
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* Data below is from https://www.unicode.org/charts/PDF/U1D400.pdf
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* That document sorts characters into groups by font type, say bold or italic.
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*
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* In the arrays below, each subarray consists three elements:
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* * The CSS class of that group when in math mode.
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* * The CSS class of that group when in text mode.
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* * The font name, so that KaTeX can get font metrics.
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*/
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const wideLatinLetterData: Array<[string, string, string]> = [
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["mathbf", "textbf", "Main-Bold"], // A-Z bold upright
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["mathbf", "textbf", "Main-Bold"], // a-z bold upright
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["mathnormal", "textit", "Math-Italic"], // A-Z italic
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["mathnormal", "textit", "Math-Italic"], // a-z italic
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["boldsymbol", "boldsymbol", "Main-BoldItalic"], // A-Z bold italic
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["boldsymbol", "boldsymbol", "Main-BoldItalic"], // a-z bold italic
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// Map fancy A-Z letters to script, not calligraphic.
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// This aligns with unicode-math and math fonts (except Cambria Math).
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["mathscr", "textscr", "Script-Regular"], // A-Z script
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["", "", ""], // a-z script. No font
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["", "", ""], // A-Z bold script. No font
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["", "", ""], // a-z bold script. No font
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["mathfrak", "textfrak", "Fraktur-Regular"], // A-Z Fraktur
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["mathfrak", "textfrak", "Fraktur-Regular"], // a-z Fraktur
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["mathbb", "textbb", "AMS-Regular"], // A-Z double-struck
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["mathbb", "textbb", "AMS-Regular"], // k double-struck
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["", "", ""], // A-Z bold Fraktur No font metrics
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["", "", ""], // a-z bold Fraktur. No font.
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["mathsf", "textsf", "SansSerif-Regular"], // A-Z sans-serif
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["mathsf", "textsf", "SansSerif-Regular"], // a-z sans-serif
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["mathboldsf", "textboldsf", "SansSerif-Bold"], // A-Z bold sans-serif
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["mathboldsf", "textboldsf", "SansSerif-Bold"], // a-z bold sans-serif
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["mathitsf", "textitsf", "SansSerif-Italic"], // A-Z italic sans-serif
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["mathitsf", "textitsf", "SansSerif-Italic"], // a-z italic sans-serif
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["", "", ""], // A-Z bold italic sans. No font
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["", "", ""], // a-z bold italic sans. No font
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["mathtt", "texttt", "Typewriter-Regular"], // A-Z monospace
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["mathtt", "texttt", "Typewriter-Regular"], // a-z monospace
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];
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const wideNumeralData: Array<[string, string, string]> = [
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["mathbf", "textbf", "Main-Bold"], // 0-9 bold
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["", "", ""], // 0-9 double-struck. No KaTeX font.
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["mathsf", "textsf", "SansSerif-Regular"], // 0-9 sans-serif
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["mathboldsf", "textboldsf", "SansSerif-Bold"], // 0-9 bold sans-serif
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["mathtt", "texttt", "Typewriter-Regular"], // 0-9 monospace
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];
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export const wideCharacterFont = function(
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wideChar: string,
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mode: Mode,
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): [string, string] {
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// IE doesn't support codePointAt(). So work with the surrogate pair.
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const H = wideChar.charCodeAt(0); // high surrogate
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const L = wideChar.charCodeAt(1); // low surrogate
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const codePoint = ((H - 0xD800) * 0x400) + (L - 0xDC00) + 0x10000;
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const j = mode === "math" ? 0 : 1; // column index for CSS class.
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if (0x1D400 <= codePoint && codePoint < 0x1D6A4) {
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// wideLatinLetterData contains exactly 26 chars on each row.
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// So we can calculate the relevant row. No traverse necessary.
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const i = Math.floor((codePoint - 0x1D400) / 26);
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return [wideLatinLetterData[i][2], wideLatinLetterData[i][j]];
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} else if (0x1D7CE <= codePoint && codePoint <= 0x1D7FF) {
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// Numerals, ten per row.
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const i = Math.floor((codePoint - 0x1D7CE) / 10);
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return [wideNumeralData[i][2], wideNumeralData[i][j]];
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} else if (codePoint === 0x1D6A5 || codePoint === 0x1D6A6) {
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// dotless i or j
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return [wideLatinLetterData[0][2], wideLatinLetterData[0][j]];
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} else if (0x1D6A6 < codePoint && codePoint < 0x1D7CE) {
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// Greek letters. Not supported, yet.
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return ["", ""];
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} else {
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// We don't support any wide characters outside 1D400–1D7FF.
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throw new ParseError("Unsupported character: " + wideChar);
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}
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};
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