| 1 | export const TYPOGRAPHY_REGIONS = ["interface", "conversation", "composer", "code", "metadata"] as const; |
| 2 | |
| 3 | export type TypographyRegion = (typeof TYPOGRAPHY_REGIONS)[number]; |
| 4 | |
| 5 | export const REGION_FONT_FAMILIES = [ |
| 6 | "inherit", |
| 7 | "system", |
| 8 | "yahei", |
| 9 | "pingfang", |
| 10 | "noto", |
| 11 | "cascadia", |
| 12 | "jetbrains", |
| 13 | "sfmono", |
| 14 | "custom", |
| 15 | ] as const; |
| 16 | |
| 17 | export type RegionFontFamily = (typeof REGION_FONT_FAMILIES)[number]; |
| 18 | |
| 19 | export type RegionTypography = { |
| 20 | followGlobal: boolean; |
| 21 | fontFamily: RegionFontFamily; |
| 22 | customFontName: string; |
| 23 | fontSize: number; |
| 24 | }; |
| 25 | |
| 26 | export type TypographyPreferences = Record<TypographyRegion, RegionTypography>; |
| 27 | |
| 28 | export const TYPOGRAPHY_STORAGE_KEY = "reasonix-region-typography-v1"; |
| 29 | export const TYPOGRAPHY_CHANGE_EVENT = "reasonix:typography-change"; |
| 30 | |
| 31 | const typographyListeners = new Set<() => void>(); |
| 32 | let lastAppliedTypographySignature = ""; |
| 33 | |
| 34 | export const TYPOGRAPHY_REGION_META: Record<TypographyRegion, { baseSize: number; min: number; max: number }> = { |
| 35 | interface: { baseSize: 14, min: 11, max: 20 }, |
| 36 | conversation: { baseSize: 14, min: 12, max: 24 }, |
| 37 | composer: { baseSize: 14, min: 12, max: 24 }, |
| 38 | code: { baseSize: 12, min: 10, max: 22 }, |
| 39 | metadata: { baseSize: 12, min: 9, max: 18 }, |
| 40 | }; |
| 41 | |
| 42 | const FONT_STACKS: Record<RegionFontFamily, string> = { |
| 43 | inherit: "", |
| 44 | system: 'var(--font-ui)', |
| 45 | yahei: '"Microsoft YaHei UI", "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif', |
| 46 | pingfang: '"PingFang SC", "苹方-简", "Noto Sans SC", "Microsoft YaHei", sans-serif', |
| 47 | noto: '"Noto Sans SC", "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif', |
| 48 | cascadia: '"Cascadia Code", "Cascadia Mono", Consolas, ui-monospace, monospace', |
| 49 | jetbrains: '"JetBrains Mono", "Cascadia Code", "SF Mono", Consolas, ui-monospace, monospace', |
| 50 | sfmono: '"SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, monospace', |
| 51 | custom: "", |
| 52 | }; |
| 53 | |
| 54 | function defaultRegion(region: TypographyRegion): RegionTypography { |
| 55 | return { |
| 56 | followGlobal: true, |
| 57 | fontFamily: "inherit", |
| 58 | customFontName: "", |
| 59 | fontSize: TYPOGRAPHY_REGION_META[region].baseSize, |
| 60 | }; |
| 61 | } |
| 62 | |
| 63 | export function createDefaultTypographyPreferences(): TypographyPreferences { |
| 64 | return Object.fromEntries(TYPOGRAPHY_REGIONS.map((region) => [region, defaultRegion(region)])) as TypographyPreferences; |
| 65 | } |
| 66 | |
| 67 | export function sanitizeCustomFontName(value: unknown): string { |
| 68 | if (typeof value !== "string") return ""; |
| 69 | const compact = value.trim().replace(/\s+/g, " ").slice(0, 200); |
| 70 | return isSafeCustomFontNameInput(compact) ? compact : ""; |
| 71 | } |
| 72 | |
| 73 | export function isSafeCustomFontNameInput(value: unknown): value is string { |
| 74 | return typeof value === "string" && !/[;{}<>]/.test(value); |
| 75 | } |
| 76 | |
| 77 | export function normalizeTypographyPreferences(value: unknown): TypographyPreferences { |
| 78 | const defaults = createDefaultTypographyPreferences(); |
| 79 | const source = value && typeof value === "object" ? (value as Record<string, unknown>) : {}; |
| 80 | |
| 81 | for (const region of TYPOGRAPHY_REGIONS) { |
| 82 | const raw = source[region]; |
| 83 | if (!raw || typeof raw !== "object") continue; |
| 84 | const candidate = raw as Record<string, unknown>; |
| 85 | const meta = TYPOGRAPHY_REGION_META[region]; |
| 86 | const numericSize = typeof candidate.fontSize === "number" && Number.isFinite(candidate.fontSize) |
| 87 | ? candidate.fontSize |
| 88 | : meta.baseSize; |
| 89 | defaults[region] = { |
| 90 | followGlobal: candidate.followGlobal !== false, |
| 91 | fontFamily: typeof candidate.fontFamily === "string" && (REGION_FONT_FAMILIES as readonly string[]).includes(candidate.fontFamily) |
| 92 | ? candidate.fontFamily as RegionFontFamily |
| 93 | : "inherit", |
| 94 | customFontName: sanitizeCustomFontName(candidate.customFontName), |
| 95 | fontSize: Math.round(Math.min(meta.max, Math.max(meta.min, numericSize))), |
| 96 | }; |
| 97 | } |
| 98 | return defaults; |
| 99 | } |
| 100 | |
| 101 | export function getTypographyPreferences(): TypographyPreferences { |
| 102 | if (typeof localStorage === "undefined") return createDefaultTypographyPreferences(); |
| 103 | try { |
| 104 | const stored = localStorage.getItem(TYPOGRAPHY_STORAGE_KEY); |
| 105 | return stored ? normalizeTypographyPreferences(JSON.parse(stored)) : createDefaultTypographyPreferences(); |
| 106 | } catch { |
| 107 | return createDefaultTypographyPreferences(); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | export function fontStackForPreference(preference: RegionTypography): string { |
| 112 | if (preference.fontFamily === "custom") return sanitizeCustomFontName(preference.customFontName); |
| 113 | return FONT_STACKS[preference.fontFamily]; |
| 114 | } |
| 115 | |
| 116 | export function applyTypographyPreferences(preferences: TypographyPreferences): void { |
| 117 | if (typeof document === "undefined") return; |
| 118 | const normalized = normalizeTypographyPreferences(preferences); |
| 119 | const root = document.documentElement; |
| 120 | |
| 121 | for (const region of TYPOGRAPHY_REGIONS) { |
| 122 | const preference = normalized[region]; |
| 123 | const scaleProperty = `--typography-${region}-scale`; |
| 124 | const sizeProperty = `--typography-${region}-size`; |
| 125 | const fontProperty = `--typography-${region}-font`; |
| 126 | if (preference.followGlobal) { |
| 127 | root.style.removeProperty(scaleProperty); |
| 128 | root.style.removeProperty(sizeProperty); |
| 129 | root.style.removeProperty(fontProperty); |
| 130 | continue; |
| 131 | } |
| 132 | root.style.setProperty(scaleProperty, String(preference.fontSize / TYPOGRAPHY_REGION_META[region].baseSize)); |
| 133 | root.style.setProperty(sizeProperty, `${preference.fontSize}px`); |
| 134 | const fontStack = fontStackForPreference(preference); |
| 135 | if (fontStack) root.style.setProperty(fontProperty, fontStack); |
| 136 | else root.style.removeProperty(fontProperty); |
| 137 | } |
| 138 | |
| 139 | try { |
| 140 | localStorage.setItem(TYPOGRAPHY_STORAGE_KEY, JSON.stringify(normalized)); |
| 141 | } catch { |
| 142 | /* private mode / no storage */ |
| 143 | } |
| 144 | |
| 145 | const signature = JSON.stringify(normalized); |
| 146 | if (signature !== lastAppliedTypographySignature) { |
| 147 | lastAppliedTypographySignature = signature; |
| 148 | for (const listener of typographyListeners) listener(); |
| 149 | if (typeof window !== "undefined") window.dispatchEvent(new CustomEvent(TYPOGRAPHY_CHANGE_EVENT)); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | export function onTypographyPreferencesChange(listener: () => void): () => void { |
| 154 | typographyListeners.add(listener); |
| 155 | return () => typographyListeners.delete(listener); |
| 156 | } |
| 157 | |
| 158 | export function initTypographyPreferences(): void { |
| 159 | applyTypographyPreferences(getTypographyPreferences()); |
| 160 | } |
| 161 |