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| Automations: rules in .g1t/automations that act when something happens | 1 | import { type HighlighterCore, createHighlighterCore } from "shiki/core"; |
| 2 | import { createJavaScriptRegexEngine } from "shiki/engine/javascript"; | |
| 3 | ||
| 4 | import type { FileDiff } from "@g1t/contracts"; | |
| 5 | ||
| 6 | import type { HighlightedFile, HighlightedLine } from "./diff"; | |
| 7 | ||
| 8 | /** | |
| 9 | * Syntax highlighting, shared by the server and the browser. Grammars are | |
| 10 | * imported on first use, so a page that highlights nothing loads none. | |
| 11 | */ | |
| 12 | ||
| 13 | /** File extension (or whole file name) to Shiki language. */ | |
| 14 | const LANGUAGES: Record<string, string> = { | |
| 15 | rs: "rust", | |
| 16 | ts: "typescript", | |
| 17 | tsx: "tsx", | |
| 18 | js: "javascript", | |
| 19 | mjs: "javascript", | |
| 20 | jsx: "jsx", | |
| 21 | json: "json", | |
| 22 | jsonc: "jsonc", | |
| 23 | toml: "toml", | |
| 24 | yaml: "yaml", | |
| 25 | yml: "yaml", | |
| 26 | md: "markdown", | |
| 27 | css: "css", | |
| 28 | html: "html", | |
| 29 | sql: "sql", | |
| 30 | sh: "shellscript", | |
| 31 | bash: "shellscript", | |
| 32 | py: "python", | |
| 33 | go: "go", | |
| 34 | dockerfile: "docker", | |
| 35 | }; | |
| 36 | ||
| You choose how g1t looks: Auto follows your system, Light and Dark stay put, set from the account menu, the phone's You and help sheet, Settings → Account or the command palette; the page is drawn in your choice from the first byte, every colour has a light value that reads at 4.5:1 or better, code and diffs are highlighted for both, diagrams and the document editor follow along, the product tour and the g1t mark's avatar stay dark, and Dark is what you see until you choose; the workspaces guide says how. | 37 | /** |
| 38 | * Code is coloured for both themes at once: each token's colour is | |
| 39 | * `light-dark(light, dark)`, so the page's Appearance (lib/theme.ts) | |
| 40 | * picks one with no second pass, and highlighted HTML kept in a cache is | |
| 41 | * right in either. | |
| 42 | */ | |
| 43 | export const THEMES = { light: "vitesse-light", dark: "vitesse-dark" } as const; | |
| Automations: rules in .g1t/automations that act when something happens | 44 | |
| 45 | /** The language of a file, from its name, if it is one g1t highlights. */ | |
| 46 | export function languageOf(path: string): string | null { | |
| 47 | const name = path.split("/").pop()!.toLowerCase(); | |
| 48 | return LANGUAGES[name.includes(".") ? name.split(".").pop()! : name] ?? null; | |
| 49 | } | |
| 50 | ||
| 51 | /** The language a fenced block names (`rust`, `ts`, `sh`…), if g1t highlights it. */ | |
| 52 | export function languageNamed(name: string): string | null { | |
| 53 | const wanted = name.toLowerCase(); | |
| 54 | if (Object.values(LANGUAGES).includes(wanted)) return wanted; | |
| 55 | return LANGUAGES[wanted] ?? (wanted === "shell" || wanted === "console" ? "shellscript" : null); | |
| 56 | } | |
| 57 | ||
| 58 | let highlighter: Promise<HighlighterCore> | undefined; | |
| 59 | ||
| 60 | export function getHighlighter(): Promise<HighlighterCore> { | |
| 61 | highlighter ??= createHighlighterCore({ | |
| You choose how g1t looks: Auto follows your system, Light and Dark stay put, set from the account menu, the phone's You and help sheet, Settings → Account or the command palette; the page is drawn in your choice from the first byte, every colour has a light value that reads at 4.5:1 or better, code and diffs are highlighted for both, diagrams and the document editor follow along, the product tour and the g1t mark's avatar stay dark, and Dark is what you see until you choose; the workspaces guide says how. | 62 | themes: [import("shiki/themes/vitesse-light.mjs"), import("shiki/themes/vitesse-dark.mjs")], |
| Automations: rules in .g1t/automations that act when something happens | 63 | langs: [ |
| 64 | import("shiki/langs/rust.mjs"), | |
| 65 | import("shiki/langs/typescript.mjs"), | |
| 66 | import("shiki/langs/tsx.mjs"), | |
| 67 | import("shiki/langs/javascript.mjs"), | |
| 68 | import("shiki/langs/jsx.mjs"), | |
| 69 | import("shiki/langs/json.mjs"), | |
| 70 | import("shiki/langs/jsonc.mjs"), | |
| 71 | import("shiki/langs/toml.mjs"), | |
| 72 | import("shiki/langs/yaml.mjs"), | |
| 73 | import("shiki/langs/markdown.mjs"), | |
| 74 | import("shiki/langs/css.mjs"), | |
| 75 | import("shiki/langs/html.mjs"), | |
| 76 | import("shiki/langs/sql.mjs"), | |
| 77 | import("shiki/langs/shellscript.mjs"), | |
| 78 | import("shiki/langs/python.mjs"), | |
| 79 | import("shiki/langs/go.mjs"), | |
| 80 | import("shiki/langs/docker.mjs"), | |
| 81 | ], | |
| 82 | engine: createJavaScriptRegexEngine(), | |
| 83 | }); | |
| 84 | return highlighter; | |
| 85 | } | |
| 86 | ||
| 87 | function escape(text: string): string { | |
| 88 | return text.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">"); | |
| 89 | } | |
| 90 | ||
| You choose how g1t looks: Auto follows your system, Light and Dark stay put, set from the account menu, the phone's You and help sheet, Settings → Account or the command palette; the page is drawn in your choice from the first byte, every colour has a light value that reads at 4.5:1 or better, code and diffs are highlighted for both, diagrams and the document editor follow along, the product tour and the g1t mark's avatar stay dark, and Dark is what you see until you choose; the workspaces guide says how. | 91 | /** A piece of a line and its colour, a `light-dark()` pair, if it has one. */ |
| 92 | export type CodeToken = { content: string; color?: string }; | |
| 93 | ||
| 94 | /** Each line of `text` as coloured tokens, for both themes. */ | |
| 95 | export function tokenRows(core: HighlighterCore, text: string, lang: string): CodeToken[][] { | |
| 96 | return core.codeToTokensWithThemes(text, { lang, themes: THEMES }).map((row) => | |
| 97 | row.map((token) => { | |
| 98 | const light = token.variants.light?.color; | |
| 99 | const dark = token.variants.dark?.color; | |
| 100 | const color = light && dark ? `light-dark(${light},${dark})` : (light ?? dark); | |
| 101 | return color ? { content: token.content, color } : { content: token.content }; | |
| 102 | }), | |
| 103 | ); | |
| 104 | } | |
| 105 | ||
| Automations: rules in .g1t/automations that act when something happens | 106 | /** Each line of `text` as HTML, coloured. */ |
| 107 | export function linesToHtml(core: HighlighterCore, text: string, lang: string): string[] { | |
| You choose how g1t looks: Auto follows your system, Light and Dark stay put, set from the account menu, the phone's You and help sheet, Settings → Account or the command palette; the page is drawn in your choice from the first byte, every colour has a light value that reads at 4.5:1 or better, code and diffs are highlighted for both, diagrams and the document editor follow along, the product tour and the g1t mark's avatar stay dark, and Dark is what you see until you choose; the workspaces guide says how. | 108 | return tokenRows(core, text, lang).map((row) => |
| Automations: rules in .g1t/automations that act when something happens | 109 | row |
| 110 | .map((token) => | |
| 111 | token.color ? `<span style="color:${token.color}">${escape(token.content)}</span>` : escape(token.content), | |
| 112 | ) | |
| 113 | .join(""), | |
| 114 | ); | |
| 115 | } | |
| 116 | ||
| 117 | /** Larger files in a diff are left plain. */ | |
| 118 | const MAX_FILE_DIFF_CHARS = 60_000; | |
| 119 | ||
| 120 | /** | |
| 121 | * A file's diff with each line's text highlighted, or null when its | |
| 122 | * language is unknown or it is too large. Each hunk is highlighted twice, | |
| 123 | * as it was and as it is, so a line's colours come from the side it is on. | |
| 124 | */ | |
| 125 | export async function highlightFile(file: FileDiff): Promise<HighlightedFile | null> { | |
| 126 | const lang = languageOf(file.path); | |
| 127 | if (!lang || file.binary) return null; | |
| 128 | const size = file.hunks.reduce((sum, hunk) => sum + hunk.lines.reduce((n, line) => n + line.text.length, 0), 0); | |
| 129 | if (size > MAX_FILE_DIFF_CHARS) return null; | |
| 130 | const core = await getHighlighter(); | |
| 131 | try { | |
| 132 | const hunks = file.hunks.map((hunk) => { | |
| 133 | const lines: HighlightedLine[] = hunk.lines.map((line) => ({ ...line })); | |
| 134 | for (const side of ["old", "new"] as const) { | |
| 135 | const indexes = lines | |
| 136 | .map((line, index) => (line.kind === (side === "old" ? "add" : "delete") ? -1 : index)) | |
| 137 | .filter((index) => index >= 0); | |
| 138 | const html = linesToHtml(core, indexes.map((index) => lines[index]!.text).join("\n"), lang); | |
| 139 | html.forEach((row, n) => { | |
| 140 | const line = lines[indexes[n]!]; | |
| 141 | // Context lines are the same on both sides; the new side wins. | |
| 142 | if (!line || (side === "old" && line.kind === "context")) return; | |
| 143 | line.html = row; | |
| 144 | }); | |
| 145 | } | |
| 146 | return { lines }; | |
| 147 | }); | |
| 148 | return { ...file, hunks }; | |
| 149 | } catch { | |
| 150 | return null; | |
| 151 | } | |
| 152 | } |
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