made tiny updates
This commit is contained in:
SinachPat
@@ -1,3 +1,5 @@
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export * from './schema.js';
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export * from './validator.js';
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export * from './tokens.js';
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export * from './parser.js';
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export * from './resolver.js';
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@@ -0,0 +1,303 @@
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/**
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* parser.ts — Phase 6
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*
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* Parses design token files into the normalised DesignToken[] format used by
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* the canvas store and token resolver.
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*
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* Supported input formats (auto-detected from the top-level structure):
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* 1. W3C DTCG — uses $value / $type fields (https://design-tokens.github.io/community-group/format/)
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* 2. Style Dictionary — nested groups, each leaf has { value, ... }
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* 3. Flat CSS variable map — { "--color-primary": "#FF0066", ... }
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*
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* spec: SOURCE-AWARE-CANVAS.md Phase 6 §9.2 "Design Language System"
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*/
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// ── DesignToken type (mirrors canvas.types.ts in the app package) ─────────────
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// Duplicated here to avoid a cross-package import at runtime.
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export type TokenType =
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| 'color'
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| 'spacing'
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| 'sizing'
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| 'borderRadius'
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| 'borderWidth'
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| 'fontFamily'
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| 'fontSize'
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| 'fontWeight'
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| 'lineHeight'
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| 'letterSpacing'
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| 'shadow'
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| 'opacity'
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| 'other';
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export interface DesignToken {
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/** CSS custom property name: "--color-primary" */
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key: string;
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/** Human label: "Color / Primary" */
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name: string;
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/** Top-level group: "color", "spacing", etc. */
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group: string;
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/** Resolved CSS value: "#0066FF" */
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rawValue: string;
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type: TokenType;
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description?: string;
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/** If resolved from an alias chain, lists each intermediate key. */
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aliasChain?: string[];
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}
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// ── Format detection ──────────────────────────────────────────────────────────
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type TokenFileFormat = 'dtcg' | 'style-dictionary' | 'flat-css-vars';
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function detectFormat(raw: Record<string, unknown>): TokenFileFormat {
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// Flat CSS var map: all keys start with "--"
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const keys = Object.keys(raw);
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if (keys.length > 0 && keys.every((k) => k.startsWith('--'))) {
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return 'flat-css-vars';
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}
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// DTCG: any value node uses $value / $type
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const hasW3cNodes = keys.some((k) => {
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const v = raw[k];
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return v && typeof v === 'object' && ('$value' in (v as object) || '$type' in (v as object));
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});
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if (hasW3cNodes) return 'dtcg';
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// Assume Style Dictionary for everything else
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return 'style-dictionary';
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}
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// ── Flat CSS var format ───────────────────────────────────────────────────────
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function parseFlatCssVars(raw: Record<string, unknown>): DesignToken[] {
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const tokens: DesignToken[] = [];
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for (const [key, val] of Object.entries(raw)) {
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if (!key.startsWith('--')) continue;
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const rawValue = String(val ?? '').trim();
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if (!rawValue) continue;
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// Derive group from the property name: "--color-primary-500" → "color"
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const withoutDashes = key.replace(/^--/, '');
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const parts = withoutDashes.split('-');
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const group = parts[0] ?? 'other';
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const name = parts.slice(1).map(capitalise).join(' ') || withoutDashes;
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tokens.push({
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key,
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name: `${capitalise(group)} / ${name}`,
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group,
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rawValue,
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type: inferTokenType(group, rawValue),
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});
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}
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return tokens;
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}
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// ── W3C DTCG format ───────────────────────────────────────────────────────────
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function parseDtcg(raw: Record<string, unknown>, pathParts: string[] = []): DesignToken[] {
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const tokens: DesignToken[] = [];
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for (const [key, val] of Object.entries(raw)) {
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if (key.startsWith('$')) continue; // skip $metadata, $description etc.
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if (!val || typeof val !== 'object') continue;
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const node = val as Record<string, unknown>;
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if ('$value' in node) {
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// Leaf token
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const rawValue = resolveAlias(String(node['$value'] ?? '').trim(), raw);
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if (!rawValue) continue;
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const fullPath = [...pathParts, key];
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const group = fullPath[0] ?? 'other';
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// §9.2: each segment passes through toKebabCase before joining so that
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// camelCase group names (e.g. "borderRadius") produce correct CSS names.
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const cssKey = `--${fullPath.map(toKebabCase).join('-').replace(/\s+/g, '-')}`;
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tokens.push({
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key: cssKey,
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name: fullPath.map(capitalise).join(' / '),
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group,
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rawValue,
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type: inferTokenTypeFromDtcg(String(node['$type'] ?? ''), rawValue),
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...(typeof node['$description'] === 'string' && { description: node['$description'] }),
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});
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} else {
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// Group node — recurse
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tokens.push(...parseDtcg(node, [...pathParts, key]));
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}
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}
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return tokens;
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}
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// ── Style Dictionary format ───────────────────────────────────────────────────
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function parseStyleDictionary(raw: Record<string, unknown>, pathParts: string[] = []): DesignToken[] {
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const tokens: DesignToken[] = [];
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for (const [key, val] of Object.entries(raw)) {
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if (!val || typeof val !== 'object') continue;
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const node = val as Record<string, unknown>;
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if ('value' in node && typeof node['value'] !== 'object') {
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// Leaf token
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const rawValue = String(node['value'] ?? '').trim();
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if (!rawValue) continue;
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const fullPath = [...pathParts, key];
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const group = fullPath[0] ?? 'other';
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// §9.2: each segment passes through toKebabCase before joining.
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const cssKey = `--${fullPath.map(toKebabCase).join('-').replace(/\s+/g, '-')}`;
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tokens.push({
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key: cssKey,
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name: fullPath.map(capitalise).join(' / '),
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group,
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rawValue,
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type: inferTokenType(group, rawValue),
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...(typeof node['comment'] === 'string' && { description: node['comment'] }),
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});
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} else {
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// Group node — recurse
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tokens.push(...parseStyleDictionary(node, [...pathParts, key]));
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}
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}
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return tokens;
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}
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// ── Public API ────────────────────────────────────────────────────────────────
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/**
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* Parse a raw token file (parsed JSON/JS object) into a flat DesignToken[].
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* Auto-detects the format from the object structure.
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*
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* @param raw Parsed token file contents (not a JSON string — call JSON.parse first)
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* @returns Flat array of normalised design tokens
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* @throws If the input is not a plain object or if parsing fails
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*/
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export function parseTokenFile(raw: unknown): DesignToken[] {
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if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
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throw new Error('Token file must be a plain JSON object');
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}
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const obj = raw as Record<string, unknown>;
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const format = detectFormat(obj);
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switch (format) {
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case 'flat-css-vars':
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return parseFlatCssVars(obj);
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case 'dtcg':
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return parseDtcg(obj);
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case 'style-dictionary':
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return parseStyleDictionary(obj);
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}
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}
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/**
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* Parse a JSON string token file.
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*/
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export function parseTokenFileJson(jsonString: string): DesignToken[] {
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let raw: unknown;
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try {
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raw = JSON.parse(jsonString);
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} catch (err) {
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throw new Error(`Invalid JSON: ${err instanceof Error ? err.message : String(err)}`);
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}
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return parseTokenFile(raw);
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}
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// ── Helpers ───────────────────────────────────────────────────────────────────
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function capitalise(str: string): string {
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return str.charAt(0).toUpperCase() + str.slice(1);
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}
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/**
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* Convert a camelCase or PascalCase path segment to kebab-case.
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* Used when building CSS custom property names from token path segments so that
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* e.g. `{ "borderRadius": { "sm": ... } }` → `--border-radius-sm` instead of
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* `--borderradius-sm`.
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*
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* spec: SOURCE-AWARE-CANVAS §9.2 "camelCase segments are converted to kebab-case"
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*
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* Examples:
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* "borderRadius" → "border-radius"
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* "fontSize" → "font-size"
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* "Color" → "color" (leading-hyphen guard prevents "---color-primary")
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* "BoxShadow" → "box-shadow"
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*/
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export function toKebabCase(s: string): string {
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return s
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.replace(/([A-Z])/g, '-$1')
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.toLowerCase()
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.replace(/^-/, ''); // strip leading hyphen produced by an initial uppercase letter
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}
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function inferTokenType(group: string, value: string): TokenType {
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const g = group.toLowerCase();
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if (g === 'color' || g === 'colors' || g === 'colour') return 'color';
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if (g === 'spacing' || g === 'space') return 'spacing';
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if (g === 'sizing' || g === 'size') return 'sizing';
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if (g === 'radius' || g === 'border-radius' || g === 'borderradius') return 'borderRadius';
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if (g === 'border-width' || g === 'borderwidth') return 'borderWidth';
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if (g === 'font-family' || g === 'fontfamily') return 'fontFamily';
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if (g === 'font-size' || g === 'fontsize') return 'fontSize';
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if (g === 'font-weight' || g === 'fontweight') return 'fontWeight';
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if (g === 'line-height' || g === 'lineheight') return 'lineHeight';
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if (g === 'letter-spacing' || g === 'letterspacing') return 'letterSpacing';
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if (g === 'shadow' || g === 'box-shadow') return 'shadow';
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if (g === 'opacity') return 'opacity';
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// Fallback: infer from value
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return inferTokenTypeFromValue(value);
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}
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function inferTokenTypeFromDtcg(dtcgType: string, value: string): TokenType {
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switch (dtcgType.toLowerCase()) {
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case 'color': return 'color';
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case 'dimension':
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case 'spacing': return 'spacing';
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case 'font-family': return 'fontFamily';
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case 'font-size': return 'fontSize';
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case 'font-weight': return 'fontWeight';
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case 'line-height': return 'lineHeight';
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case 'letter-spacing':return 'letterSpacing';
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case 'shadow': return 'shadow';
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case 'opacity': return 'opacity';
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case 'border-radius': return 'borderRadius';
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default: return inferTokenTypeFromValue(value);
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}
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}
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function inferTokenTypeFromValue(value: string): TokenType {
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const v = value.toLowerCase().trim();
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if (v.startsWith('#') || v.startsWith('rgb') || v.startsWith('hsl') || v.startsWith('oklch')) return 'color';
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if (v.endsWith('px') || v.endsWith('rem') || v.endsWith('em')) return 'spacing';
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if (v.includes('shadow') || v.includes('blur')) return 'shadow';
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return 'other';
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}
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/**
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* Resolve a DTCG alias like "{color.primary.500}" to a flat CSS value.
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* Returns the alias string unchanged if it cannot be resolved.
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*/
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function resolveAlias(value: string, root: Record<string, unknown>): string {
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const aliasMatch = value.match(/^\{(.+)\}$/);
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if (!aliasMatch?.[1]) return value;
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const path = aliasMatch[1].split('.');
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let cursor: unknown = root;
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for (const segment of path) {
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if (!cursor || typeof cursor !== 'object') return value;
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cursor = (cursor as Record<string, unknown>)[segment];
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}
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if (cursor && typeof cursor === 'object' && '$value' in (cursor as object)) {
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return String((cursor as Record<string, unknown>)['$value'] ?? value);
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}
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if (typeof cursor === 'string') return cursor;
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return value;
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}
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@@ -0,0 +1,206 @@
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/**
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* resolver.ts — Phase 6
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*
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* Resolves a live CSS value (computed from the selected element) to the closest
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* matching design token, using OKLCH perceptual color distance for colors and
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* exact/near-match for numeric values.
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*
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* spec: SOURCE-AWARE-CANVAS.md Phase 6 §9.3 "Token Resolver"
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*/
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import { formatHex, oklch, parse as culoriParse, differenceCiede2000 } from 'culori';
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import type { DesignToken } from './parser.js';
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export interface TokenMatch {
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token: DesignToken;
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/** Value matches token exactly (distance === 0). */
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exact: boolean;
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/** 0 = exact; higher = further from a match. Max useful threshold ≈ 10. */
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distance: number;
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}
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// ── Color resolution ──────────────────────────────────────────────────────────
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const colorDifference = differenceCiede2000();
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/**
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* Compute the perceptual color distance between two CSS color strings.
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* Uses CIEDE2000 via culori. Returns Infinity if either value cannot be parsed.
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*/
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function colorDistance(a: string, b: string): number {
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try {
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const ca = culoriParse(a);
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const cb = culoriParse(b);
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if (!ca || !cb) return Infinity;
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return colorDifference(ca, cb);
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} catch {
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return Infinity;
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}
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}
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// ── Numeric resolution ────────────────────────────────────────────────────────
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function parseNumericPx(value: string): number | null {
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const v = value.trim();
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if (v.endsWith('px')) {
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const n = parseFloat(v);
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return isNaN(n) ? null : n;
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}
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if (v.endsWith('rem')) {
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const n = parseFloat(v);
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return isNaN(n) ? null : n * 16; // normalise with standard 16px base
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}
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const n = parseFloat(v);
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if (!isNaN(n) && v === String(n)) return n;
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return null;
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}
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function numericDistance(a: string, b: string): number {
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const na = parseNumericPx(a);
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const nb = parseNumericPx(b);
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if (na === null || nb === null) return Infinity;
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return Math.abs(na - nb);
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}
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// ── Public API ────────────────────────────────────────────────────────────────
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const COLOR_DISTANCE_THRESHOLD = 10; // CIEDE2000 units (perceptible but close)
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const NUMERIC_DISTANCE_THRESHOLD = 2; // px
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/**
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* Find the best matching design token for a given CSS value.
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*
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* @param cssValue A computed CSS value string (e.g. "rgb(0, 102, 255)", "16px")
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* @param tokens The loaded token array from the canvas store
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* @param rootFontSizePx Optional root font size for rem → px normalisation (default 16)
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* @returns TokenMatch or null if no match is within the acceptable threshold
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*/
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export function resolveValueToToken(
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cssValue: string,
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tokens: DesignToken[],
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rootFontSizePx = 16,
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): TokenMatch | null {
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if (!tokens.length || !cssValue.trim()) return null;
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// Normalise the input value to a canonical form
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const normalised = normaliseCssValue(cssValue.trim(), rootFontSizePx);
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let bestMatch: TokenMatch | null = null;
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let bestDistance = Infinity;
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for (const token of tokens) {
|
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const tokenNorm = normaliseCssValue(token.rawValue, rootFontSizePx);
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let distance: number;
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if (token.type === 'color') {
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distance = colorDistance(normalised, tokenNorm);
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if (distance > COLOR_DISTANCE_THRESHOLD) continue;
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} else {
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distance = numericDistance(normalised, tokenNorm);
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||||
if (distance > NUMERIC_DISTANCE_THRESHOLD) continue;
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||||
}
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||||
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||||
if (distance < bestDistance) {
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bestDistance = distance;
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||||
bestMatch = { token, exact: distance === 0, distance };
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||||
}
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||||
}
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||||
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||||
return bestMatch;
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||||
}
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||||
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/**
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* Find ALL tokens that closely match a value, sorted by distance (closest first).
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* Useful for the TokenPicker dropdown.
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||||
*
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||||
* @param limit Maximum number of matches to return (default 5)
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*/
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export function resolveValueToTokens(
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cssValue: string,
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tokens: DesignToken[],
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||||
rootFontSizePx = 16,
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limit = 5,
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||||
): TokenMatch[] {
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if (!tokens.length || !cssValue.trim()) return [];
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||||
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const normalised = normaliseCssValue(cssValue.trim(), rootFontSizePx);
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const matches: TokenMatch[] = [];
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for (const token of tokens) {
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const tokenNorm = normaliseCssValue(token.rawValue, rootFontSizePx);
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let distance: number;
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||||
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if (token.type === 'color') {
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distance = colorDistance(normalised, tokenNorm);
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if (distance > COLOR_DISTANCE_THRESHOLD) continue;
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} else {
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distance = numericDistance(normalised, tokenNorm);
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if (distance > NUMERIC_DISTANCE_THRESHOLD) continue;
|
||||
}
|
||||
|
||||
matches.push({ token, exact: distance === 0, distance });
|
||||
}
|
||||
|
||||
return matches
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||||
.sort((a, b) => a.distance - b.distance)
|
||||
.slice(0, limit);
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a token key (CSS custom property), look it up in the token array.
|
||||
*/
|
||||
export function findTokenByKey(key: string, tokens: DesignToken[]): DesignToken | undefined {
|
||||
return tokens.find((t) => t.key === key);
|
||||
}
|
||||
|
||||
// ── Helpers ───────────────────────────────────────────────────────────────────
|
||||
|
||||
/**
|
||||
* Normalise a CSS value to a canonical form for comparison.
|
||||
* - Colors: convert to hex via culori
|
||||
* - rem values: convert to px using the root font size
|
||||
* - Everything else: lowercase trim
|
||||
*/
|
||||
function normaliseCssValue(value: string, rootFontSizePx: number): string {
|
||||
const v = value.trim().toLowerCase();
|
||||
|
||||
// Try color parsing
|
||||
try {
|
||||
const parsed = culoriParse(v);
|
||||
if (parsed) {
|
||||
return formatHex(parsed) ?? v;
|
||||
}
|
||||
} catch { /* not a color */ }
|
||||
|
||||
// rem → px
|
||||
if (v.endsWith('rem')) {
|
||||
const n = parseFloat(v);
|
||||
if (!isNaN(n)) return `${n * rootFontSizePx}px`;
|
||||
}
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
// ── OKLCH color info (for UI display) ────────────────────────────────────────
|
||||
|
||||
export interface OklchInfo {
|
||||
l: number; // lightness 0–1
|
||||
c: number; // chroma
|
||||
h: number; // hue 0–360
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse a CSS color string into OKLCH components.
|
||||
* Returns null if the color cannot be parsed.
|
||||
*/
|
||||
export function parseOklch(color: string): OklchInfo | null {
|
||||
try {
|
||||
const parsed = culoriParse(color);
|
||||
if (!parsed) return null;
|
||||
const ok = oklch(parsed);
|
||||
if (!ok) return null;
|
||||
return { l: ok.l ?? 0, c: ok.c ?? 0, h: ok.h ?? 0 };
|
||||
} catch {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user