import fs from 'node:fs';
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import path from 'node:path';
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import { profileStep, recordProfileEvent } from '../../profile/profiler.mjs';
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import { CSS_NAMED_COLORS, collectCssCustomProps, cssLengthToPx, parseAnyColor, resolveLengthPx, resolveVarRefs } from '../../rules/checks.mjs';
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// ---------------------------------------------------------------------------
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// jsdom CSS-variable border override map
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// ---------------------------------------------------------------------------
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//
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// jsdom's CSSOM silently drops any border shorthand that contains a var()
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// reference — the computed style for the element then shows empty width,
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// empty style, and a default black color. That's enough to hide the most
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// common real-world side-tab pattern in AI-generated pages:
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//
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// :root { --brand: #87a8ff; }
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// .card { border-left: 5px solid var(--brand); border-radius: 4px; }
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//
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// Real browsers (and therefore the browser detector path) resolve var()
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// natively, so this only affects the Node jsdom path.
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//
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// This pre-pass walks the stylesheets, finds any rule whose per-side or
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// all-sides border property contains var(), resolves the var() against
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// :root-level custom properties (read from the documentElement's computed
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// style, which jsdom DOES handle correctly), and attaches the resolved
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// width+color to every element that matches the rule's selector. The
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// Node-side `checkElementBorders` adapter consumes that map as a fallback
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// whenever jsdom's computed style came back empty.
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//
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// Limitations (intentional, to keep the pass simple):
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// * Only :root-level custom properties are resolved. Scoped overrides on
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// descendants are not tracked — uncommon in practice and would require
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// a per-element cascade walk.
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// * @media / @supports wrapped rules are ignored (jsdom often mishandles
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// these anyway).
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// * The fallback only fills sides that jsdom left empty, so any rule
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// whose border parses normally still wins via the computed style.
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const BORDER_SHORTHAND_RE = /^(\d+(?:\.\d+)?)px\s+(solid|dashed|dotted|double|groove|ridge|inset|outset)\s+(.+)$/i;
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// isNeutralColor only understands rgba()/oklch()/lch()/lab()/hsl()/hwb().
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// CSS variables typically hold hex or named colors, so normalize those to
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// rgb() before handing the value off to the shared check. Anything we don't
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// recognise is passed through unchanged — isNeutralColor then treats it as
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// non-neutral, which is the safer default (matches the oklch-era bugfix).
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const NAMED_COLORS = {
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white: [255, 255, 255], black: [0, 0, 0], gray: [128, 128, 128],
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grey: [128, 128, 128], silver: [192, 192, 192], red: [255, 0, 0],
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green: [0, 128, 0], blue: [0, 0, 255], yellow: [255, 255, 0],
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};
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function normalizeColorForCheck(value) {
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if (!value) return value;
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const v = value.trim();
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const hex6 = v.match(/^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i);
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if (hex6) {
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const [r, g, b] = [parseInt(hex6[1], 16), parseInt(hex6[2], 16), parseInt(hex6[3], 16)];
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return `rgb(${r}, ${g}, ${b})`;
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}
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const hex3 = v.match(/^#([0-9a-f])([0-9a-f])([0-9a-f])$/i);
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if (hex3) {
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const [r, g, b] = [
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parseInt(hex3[1] + hex3[1], 16),
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parseInt(hex3[2] + hex3[2], 16),
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parseInt(hex3[3] + hex3[3], 16),
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];
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return `rgb(${r}, ${g}, ${b})`;
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}
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const named = NAMED_COLORS[v.toLowerCase()];
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if (named) return `rgb(${named[0]}, ${named[1]}, ${named[2]})`;
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return v;
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}
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function buildBorderOverrideMap(document, window) {
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const map = new Map();
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const rootStyle = window.getComputedStyle(document.documentElement);
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function resolveVar(value, depth = 0) {
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if (!value || depth > 10 || !value.includes('var(')) return value;
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return value.replace(
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/var\(\s*(--[\w-]+)\s*(?:,\s*([^)]+))?\s*\)/g,
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(_, name, fallback) => {
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const v = rootStyle.getPropertyValue(name).trim();
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if (v) return resolveVar(v, depth + 1);
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if (fallback) return resolveVar(fallback.trim(), depth + 1);
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return '';
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}
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);
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}
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function parseShorthand(text) {
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const m = text.trim().match(BORDER_SHORTHAND_RE);
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if (!m) return null;
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return { width: parseFloat(m[1]), color: normalizeColorForCheck(m[3]) };
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}
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// Read from the per-property accessors on rule.style. jsdom preserves
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// each border-* shorthand it parsed, even when the overall cssText has
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// been truncated (e.g. a `border: 1px solid var(...)` followed by a
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// `border-left: ...` loses the first declaration but keeps the second).
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const SIDE_PROPS = [
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['borderLeft', 'Left'],
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['borderRight', 'Right'],
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['borderTop', 'Top'],
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['borderBottom', 'Bottom'],
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['borderInlineStart', 'Left'],
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['borderInlineEnd', 'Right'],
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];
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for (const sheet of document.styleSheets) {
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let rules;
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try { rules = sheet.cssRules || []; } catch { continue; }
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for (const rule of rules) {
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// CSSStyleRule only; skip @media / @keyframes / @supports wrappers.
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if (rule.type !== 1 || !rule.style || !rule.selectorText) continue;
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const perSide = {};
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for (const [prop, side] of SIDE_PROPS) {
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const val = rule.style[prop];
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if (!val || !val.includes('var(')) continue;
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const parsed = parseShorthand(resolveVar(val));
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if (parsed && parsed.color) perSide[side] = parsed;
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}
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// Uniform `border: <w> <style> var(...)` applies to every side the
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// per-side map didn't already claim.
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const borderAll = rule.style.border;
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if (borderAll && borderAll.includes('var(')) {
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const parsed = parseShorthand(resolveVar(borderAll));
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if (parsed && parsed.color) {
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for (const s of ['Top', 'Right', 'Bottom', 'Left']) {
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if (!perSide[s]) perSide[s] = parsed;
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}
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}
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}
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// Longhand `border-*-color: var(...)` with width/style in separate
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// declarations. Rare in AI-generated pages, but cheap to cover.
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for (const [prop, side] of [
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['borderLeftColor', 'Left'],
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['borderRightColor', 'Right'],
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['borderTopColor', 'Top'],
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['borderBottomColor', 'Bottom'],
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]) {
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const val = rule.style[prop];
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if (!val || !val.includes('var(')) continue;
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const resolved = resolveVar(val).trim();
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if (!resolved) continue;
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// Width may or may not come from this rule — that's fine; the
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// adapter only substitutes the color when jsdom left it as a
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// literal var() string.
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if (!perSide[side]) perSide[side] = { width: 0, color: normalizeColorForCheck(resolved) };
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}
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if (Object.keys(perSide).length === 0) continue;
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let matched;
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try { matched = document.querySelectorAll(rule.selectorText); }
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catch { continue; }
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for (const el of matched) {
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const existing = map.get(el);
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if (existing) {
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// Later rules overwrite earlier ones — approximates source-order
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// cascade for equal-specificity rules and is good enough for the
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// uncontested var()-dropped sides we're trying to recover.
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Object.assign(existing, perSide);
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} else {
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map.set(el, { ...perSide });
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}
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}
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}
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}
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return map;
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}
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// Strip `@layer NAME { … }` wrappers from a CSS / HTML source, leaving
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// the inner rules as flat CSS. jsdom doesn't implement CSS @layer, so
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// any rule inside a layer block becomes invisible to getComputedStyle.
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// Tailwind v4 makes this ubiquitous: every utility class lives in
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// `@layer utilities`, and Preflight lives in `@layer base`. Without
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// unwrapping, every Tailwind-styled element returns empty computed
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// styles. We walk the source character-by-character, balancing braces
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// so we correctly handle nested style rules inside the layer block.
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function unwrapCssAtLayer(source) {
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if (!source || !source.includes('@layer')) return source;
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// Find `@layer <name>? {` openers. The match starts at the @, and
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// we then balance braces from the opening { onward.
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const re = /@layer\b[^{;]*\{/g;
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let out = '';
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let lastIdx = 0;
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let m;
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while ((m = re.exec(source)) !== null) {
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const openStart = m.index;
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const openEnd = m.index + m[0].length; // position right after `{`
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let depth = 1;
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let i = openEnd;
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while (i < source.length && depth > 0) {
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const c = source.charCodeAt(i);
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if (c === 0x7b /* { */) depth++;
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else if (c === 0x7d /* } */) depth--;
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i++;
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}
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if (depth !== 0) {
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// Unbalanced — bail and return source unchanged.
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return source;
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}
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// Emit everything before the @layer, then the inner contents
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// (between the opening { and the matched closing }), then advance.
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out += source.slice(lastIdx, openStart);
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out += source.slice(openEnd, i - 1); // i-1 = position of the closing }
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lastIdx = i;
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re.lastIndex = i;
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}
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out += source.slice(lastIdx);
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return out;
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}
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// ---------------------------------------------------------------------------
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// Static HTML/CSS detection (default for local HTML files)
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// ---------------------------------------------------------------------------
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const STATIC_INHERITED_PROPS = new Set([
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'color', 'fontFamily', 'fontSize', 'fontStyle', 'fontWeight', 'fontVariant',
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'lineHeight', 'letterSpacing', 'textTransform', 'textAlign', 'hyphens',
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'webkitHyphens',
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]);
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const STATIC_DEFAULT_STYLE = {
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color: 'rgb(0, 0, 0)',
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backgroundColor: 'rgba(0, 0, 0, 0)',
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backgroundImage: 'none',
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borderTopWidth: '0px',
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borderRightWidth: '0px',
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borderBottomWidth: '0px',
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borderLeftWidth: '0px',
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borderTopColor: 'rgb(0, 0, 0)',
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borderRightColor: 'rgb(0, 0, 0)',
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borderBottomColor: 'rgb(0, 0, 0)',
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borderLeftColor: 'rgb(0, 0, 0)',
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borderRadius: '0px',
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outlineWidth: '0px',
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outlineColor: 'rgb(0, 0, 0)',
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outlineStyle: 'none',
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boxShadow: 'none',
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// NOT in STATIC_INHERITED_PROPS even though text-shadow inherits in real
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// CSS: the glow check only needs to fire once, on the element that
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// declares the shadow, not on every descendant.
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textShadow: 'none',
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fontFamily: '',
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fontSize: '16px',
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fontStyle: 'normal',
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fontVariant: 'normal',
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fontWeight: '400',
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lineHeight: 'normal',
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letterSpacing: 'normal',
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textTransform: 'none',
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textAlign: 'start',
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hyphens: 'manual',
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webkitHyphens: 'manual',
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transitionProperty: '',
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transitionTimingFunction: '',
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animationName: '',
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animationTimingFunction: '',
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webkitBackgroundClip: '',
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backgroundClip: '',
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width: '',
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height: '',
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paddingTop: '0px',
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paddingRight: '0px',
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paddingBottom: '0px',
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paddingLeft: '0px',
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marginTop: '0px',
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marginRight: '0px',
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marginBottom: '0px',
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marginLeft: '0px',
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position: 'static',
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visibility: 'visible',
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top: 'auto',
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right: 'auto',
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bottom: 'auto',
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left: 'auto',
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inset: '',
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display: '',
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overflow: 'visible',
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overflowX: 'visible',
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overflowY: 'visible',
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};
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const STATIC_PROP_MAP = {
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'background-color': 'backgroundColor',
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'background-image': 'backgroundImage',
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'background-clip': 'backgroundClip',
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'-webkit-background-clip': 'webkitBackgroundClip',
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'border-radius': 'borderRadius',
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'border-top-width': 'borderTopWidth',
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'border-right-width': 'borderRightWidth',
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'border-bottom-width': 'borderBottomWidth',
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'border-left-width': 'borderLeftWidth',
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'border-top-color': 'borderTopColor',
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'border-right-color': 'borderRightColor',
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'border-bottom-color': 'borderBottomColor',
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'border-left-color': 'borderLeftColor',
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'outline-width': 'outlineWidth',
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'outline-color': 'outlineColor',
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'outline-style': 'outlineStyle',
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'box-shadow': 'boxShadow',
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'text-shadow': 'textShadow',
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'font-family': 'fontFamily',
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'font-size': 'fontSize',
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'font-style': 'fontStyle',
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'font-weight': 'fontWeight',
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'line-height': 'lineHeight',
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'letter-spacing': 'letterSpacing',
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'text-transform': 'textTransform',
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'text-align': 'textAlign',
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'hyphens': 'hyphens',
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'-webkit-hyphens': 'webkitHyphens',
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'transition-property': 'transitionProperty',
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'transition-timing-function': 'transitionTimingFunction',
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'animation-name': 'animationName',
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'animation-timing-function': 'animationTimingFunction',
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'width': 'width',
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'height': 'height',
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'padding-top': 'paddingTop',
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'padding-right': 'paddingRight',
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'padding-bottom': 'paddingBottom',
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'padding-left': 'paddingLeft',
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'margin-top': 'marginTop',
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'margin-right': 'marginRight',
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'margin-bottom': 'marginBottom',
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'margin-left': 'marginLeft',
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'position': 'position',
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'visibility': 'visibility',
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'top': 'top',
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'right': 'right',
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'bottom': 'bottom',
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'left': 'left',
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'inset': 'inset',
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'display': 'display',
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'overflow': 'overflow',
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'overflow-x': 'overflowX',
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'overflow-y': 'overflowY',
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};
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// parseStaticColor tries parseAnyColor first, which already resolves every
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// name in the shared CSS_NAMED_COLORS table. This fallback only carries the
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// keywords parseAnyColor deliberately returns null for: the cascade needs
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// `transparent` to read as an actual zero-alpha color.
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const STATIC_NAMED_COLORS = {
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transparent: { r: 0, g: 0, b: 0, a: 0 },
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};
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// Named-color alternation for plucking a color token out of shorthand values
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// (issue #359: a hardcoded 9-name list here silently dropped `purple`,
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// `crimson`, `teal`, ... from border shorthands, so the side defaulted to
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// neutral black and side-tab never fired on .html files). Derived from the
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// same table parseAnyColor resolves against, so extraction and parsing can't
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// drift apart. Longest-first so names containing other names as substrings
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// (rebeccapurple) are matched whole.
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const NAMED_COLOR_TOKENS = [...Object.keys(CSS_NAMED_COLORS), ...Object.keys(STATIC_NAMED_COLORS)]
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.sort((a, b) => b.length - a.length)
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.join('|');
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const STATIC_COLOR_TOKEN_RE = new RegExp(
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`(?:rgba?\\([^)]+\\)|oklch\\([^)]+\\)|oklab\\([^)]+\\)|lch\\([^)]+\\)|lab\\([^)]+\\)|hsla?\\([^)]+\\)|hwb\\([^)]+\\)|#[0-9a-f]{3,8}\\b|\\b(?:${NAMED_COLOR_TOKENS})\\b)`,
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'i'
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);
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function splitCssList(value) {
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const parts = [];
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let depth = 0, quote = '', start = 0;
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for (let i = 0; i < value.length; i++) {
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const ch = value[i];
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if (quote) {
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if (ch === quote && value[i - 1] !== '\\') quote = '';
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continue;
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}
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if (ch === '"' || ch === "'") { quote = ch; continue; }
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if (ch === '(' || ch === '[') depth++;
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else if (ch === ')' || ch === ']') depth = Math.max(0, depth - 1);
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else if (ch === ',' && depth === 0) {
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parts.push(value.slice(start, i).trim());
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start = i + 1;
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}
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}
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const tail = value.slice(start).trim();
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if (tail) parts.push(tail);
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return parts;
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}
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function splitCssTokens(value) {
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const tokens = [];
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let depth = 0, quote = '', current = '';
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for (let i = 0; i < value.length; i++) {
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const ch = value[i];
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if (quote) {
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current += ch;
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if (ch === quote && value[i - 1] !== '\\') quote = '';
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continue;
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}
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if (ch === '"' || ch === "'") { quote = ch; current += ch; continue; }
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if (ch === '(') { depth++; current += ch; continue; }
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if (ch === ')') { depth = Math.max(0, depth - 1); current += ch; continue; }
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if (/\s/.test(ch) && depth === 0) {
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if (current) { tokens.push(current); current = ''; }
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continue;
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}
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current += ch;
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}
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if (current) tokens.push(current);
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return tokens;
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}
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function cssPropToCamel(prop) {
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if (!prop) return prop;
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const mapped = STATIC_PROP_MAP[prop];
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if (mapped) return mapped;
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return prop.replace(/-([a-z])/g, (_m, ch) => ch.toUpperCase());
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}
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function staticColorToCss(c) {
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if (!c) return '';
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if (c.a != null && c.a < 1) return `rgba(${c.r}, ${c.g}, ${c.b}, ${Number(c.a.toFixed(3))})`;
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return `rgb(${c.r}, ${c.g}, ${c.b})`;
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}
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function parseStaticColor(value) {
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const parsed = parseAnyColor(value);
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if (parsed) return parsed;
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const named = STATIC_NAMED_COLORS[String(value || '').trim().toLowerCase()];
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return named ? { ...named } : null;
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}
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function extractStaticColor(value) {
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if (!value) return '';
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const raw = String(value).trim();
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if (/^var\(/i.test(raw)) return raw;
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// color-mix(...) needs balanced-paren capture (its arguments regularly
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// contain nested var()/oklch() calls AND the keyword `transparent`, which
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// the flat regex below would otherwise pluck out of the middle of the
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// expression and report as the whole color).
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const mixStart = raw.search(/color-mix\(/i);
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if (mixStart !== -1) {
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let depth = 0;
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for (let i = raw.indexOf('(', mixStart); i < raw.length; i++) {
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if (raw[i] === '(') depth++;
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else if (raw[i] === ')') {
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depth--;
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if (depth === 0) return raw.slice(mixStart, i + 1);
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}
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}
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return '';
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}
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const colorLike = raw.match(STATIC_COLOR_TOKEN_RE);
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if (!colorLike) return '';
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return colorLike[0];
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}
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function normalizeStaticCssValue(prop, value, customProps, parentStyle, currentStyle = null) {
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let resolved = resolveVarRefs(String(value || '').trim(), customProps);
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if (resolved === 'inherit') return parentStyle?.[prop] || STATIC_DEFAULT_STYLE[prop] || '';
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const isModernBorderColor = /^border[A-Z][a-z]+Color$/.test(prop) && /^(?:oklch|oklab|lch|lab|hsl|hwb)\(/i.test(resolved);
|
if (!isModernBorderColor && (/color$/i.test(prop) || prop === 'color' || prop === 'backgroundColor')) {
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const parsed = parseStaticColor(resolved);
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if (parsed) resolved = staticColorToCss(parsed);
|
}
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if (prop === 'fontSize') {
|
const base = parseFloat(parentStyle?.fontSize) || 16;
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const px = resolveLengthPx(resolved, base);
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if (px != null) resolved = `${px}px`;
|
}
|
if (prop === 'letterSpacing') {
|
const base = parseFloat(currentStyle?.fontSize || parentStyle?.fontSize) || 16;
|
const px = resolveLengthPx(resolved, base);
|
if (px != null) resolved = `${px}px`;
|
}
|
if (prop === 'lineHeight' && resolved !== 'normal') {
|
const base = parseFloat(currentStyle?.fontSize || parentStyle?.fontSize) || 16;
|
const px = resolveLengthPx(resolved, base);
|
if (px != null) resolved = `${px}px`;
|
}
|
return resolved;
|
}
|
|
function expandStaticBoxValues(tokens) {
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if (tokens.length === 0) return ['0px', '0px', '0px', '0px'];
|
if (tokens.length === 1) return [tokens[0], tokens[0], tokens[0], tokens[0]];
|
if (tokens.length === 2) return [tokens[0], tokens[1], tokens[0], tokens[1]];
|
if (tokens.length === 3) return [tokens[0], tokens[1], tokens[2], tokens[1]];
|
return [tokens[0], tokens[1], tokens[2], tokens[3]];
|
}
|
|
function parseStaticBorder(value) {
|
const tokens = splitCssTokens(value);
|
let width = '', color = '';
|
for (const token of tokens) {
|
if (!width && /^-?[\d.]+(?:px|rem|em|%)$/.test(token)) width = token;
|
if (!color) color = extractStaticColor(token);
|
}
|
return { width, color };
|
}
|
|
function parseStaticFont(value) {
|
const out = [];
|
const slashParts = value.match(/(?:^|\s)([\d.]+(?:px|rem|em|%))(?:\/([^\s]+))?/);
|
if (/\bitalic\b/i.test(value)) out.push(['fontStyle', 'italic']);
|
const weight = value.match(/\b([1-9]00|bold|normal|lighter|bolder)\b/i);
|
if (weight) out.push(['fontWeight', weight[1]]);
|
if (slashParts) {
|
out.push(['fontSize', slashParts[1]]);
|
if (slashParts[2]) out.push(['lineHeight', slashParts[2]]);
|
const familyStart = value.indexOf(slashParts[0]) + slashParts[0].length;
|
const family = value.slice(familyStart).trim();
|
if (family) out.push(['fontFamily', family]);
|
}
|
return out;
|
}
|
|
function parseStaticTransition(value) {
|
const props = [];
|
const timings = [];
|
for (const item of splitCssList(value)) {
|
const tokens = splitCssTokens(item);
|
const timing = tokens.find(token => /^(?:ease|linear|step-|cubic-bezier\()/i.test(token));
|
if (timing) timings.push(timing);
|
const prop = tokens.find(token => /^[a-z-]+$/i.test(token) && !/^(?:ease|linear|infinite|alternate|forwards|backwards|both|normal|none)$/.test(token) && !/s$/.test(token));
|
if (prop) props.push(prop);
|
}
|
return {
|
property: props.join(', '),
|
timing: timings.join(', '),
|
};
|
}
|
|
function parseStaticAnimation(value) {
|
const names = [];
|
const timings = [];
|
for (const item of splitCssList(value)) {
|
const tokens = splitCssTokens(item);
|
const timing = tokens.find(token => /^(?:ease|linear|step-|cubic-bezier\()/i.test(token));
|
if (timing) timings.push(timing);
|
const name = tokens.find(token =>
|
/^[a-z_-][\w-]*$/i.test(token) &&
|
!/^(?:ease|linear|infinite|alternate|forwards|backwards|both|normal|none|running|paused)$/.test(token)
|
);
|
if (name) names.push(name);
|
}
|
return {
|
name: names.join(', '),
|
timing: timings.join(', '),
|
};
|
}
|
|
function expandStaticDeclaration(prop, value) {
|
const p = prop.toLowerCase();
|
const v = String(value || '').trim();
|
if (!v) return [];
|
if (p.startsWith('--')) return [[p, v]];
|
if (p === 'background') {
|
const out = [];
|
const hasImage = /gradient|url\(/i.test(v);
|
if (hasImage) out.push(['backgroundImage', v]);
|
const beforeImage = hasImage ? v.split(/(?:repeating-)?(?:linear|radial|conic)-gradient\(|url\(/i)[0] : v;
|
const color = extractStaticColor(hasImage ? beforeImage : v);
|
if (color) out.push(['backgroundColor', color]);
|
// The `background` shorthand resets every longhand it does not set.
|
// Without this, `pre code { background: none }` leaves an earlier
|
// `background: var(--surface)` color standing and the contrast checks
|
// measure text against a surface the browser never paints. var() values
|
// stay untouched: they may resolve to a color later in the pipeline.
|
if (!color && !hasImage && !/var\(/i.test(v)) {
|
out.push(['backgroundColor', 'rgba(0, 0, 0, 0)']);
|
out.push(['backgroundImage', 'none']);
|
}
|
return out;
|
}
|
if (p === 'border') {
|
const parsed = parseStaticBorder(v);
|
const out = [];
|
for (const side of ['Top', 'Right', 'Bottom', 'Left']) {
|
if (parsed.width) out.push([`border${side}Width`, parsed.width]);
|
if (parsed.color) out.push([`border${side}Color`, parsed.color]);
|
}
|
return out;
|
}
|
if (p === 'outline') {
|
// `outline` shorthand: width | style | color, in any order. Reuse the
|
// border parser for width + color, then sniff a style keyword from the
|
// tokens (solid|dashed|...). `outline: 0` (single-token zero) zeros
|
// the width and effectively hides the outline.
|
const tokens = splitCssTokens(v);
|
const parsed = parseStaticBorder(v);
|
const styleToken = tokens.find(t =>
|
/^(none|hidden|solid|dashed|dotted|double|groove|ridge|inset|outset)$/i.test(t)
|
);
|
const out = [];
|
if (parsed.width) out.push(['outlineWidth', parsed.width]);
|
if (parsed.color) out.push(['outlineColor', parsed.color]);
|
if (styleToken) out.push(['outlineStyle', styleToken.toLowerCase()]);
|
// `outline: 0` with no other tokens: explicit zero width.
|
if (!parsed.width && /^0(?:px|rem|em|%)?$/.test(v.trim())) {
|
out.push(['outlineWidth', '0px']);
|
}
|
return out;
|
}
|
const sideMatch = p.match(/^border-(top|right|bottom|left)$/);
|
if (sideMatch) {
|
const parsed = parseStaticBorder(v);
|
const side = sideMatch[1][0].toUpperCase() + sideMatch[1].slice(1);
|
return [
|
...(parsed.width ? [[`border${side}Width`, parsed.width]] : []),
|
...(parsed.color ? [[`border${side}Color`, parsed.color]] : []),
|
];
|
}
|
if (p === 'border-width') {
|
const vals = expandStaticBoxValues(splitCssTokens(v));
|
return [
|
['borderTopWidth', vals[0]],
|
['borderRightWidth', vals[1]],
|
['borderBottomWidth', vals[2]],
|
['borderLeftWidth', vals[3]],
|
];
|
}
|
if (p === 'border-color') {
|
const vals = expandStaticBoxValues(splitCssTokens(v));
|
return [
|
['borderTopColor', vals[0]],
|
['borderRightColor', vals[1]],
|
['borderBottomColor', vals[2]],
|
['borderLeftColor', vals[3]],
|
];
|
}
|
if (p === 'padding') {
|
const vals = expandStaticBoxValues(splitCssTokens(v));
|
return [
|
['paddingTop', vals[0]],
|
['paddingRight', vals[1]],
|
['paddingBottom', vals[2]],
|
['paddingLeft', vals[3]],
|
];
|
}
|
if (p === 'margin') {
|
const vals = expandStaticBoxValues(splitCssTokens(v));
|
return [
|
['marginTop', vals[0]],
|
['marginRight', vals[1]],
|
['marginBottom', vals[2]],
|
['marginLeft', vals[3]],
|
];
|
}
|
if (p === 'font') return parseStaticFont(v);
|
if (p === 'transition') {
|
const parsed = parseStaticTransition(v);
|
return [
|
...(parsed.property ? [['transitionProperty', parsed.property]] : []),
|
...(parsed.timing ? [['transitionTimingFunction', parsed.timing]] : []),
|
];
|
}
|
if (p === 'animation') {
|
const parsed = parseStaticAnimation(v);
|
return [
|
...(parsed.name ? [['animationName', parsed.name]] : []),
|
...(parsed.timing ? [['animationTimingFunction', parsed.timing]] : []),
|
];
|
}
|
const mapped = cssPropToCamel(p);
|
if (STATIC_DEFAULT_STYLE[mapped] != null || STATIC_INHERITED_PROPS.has(mapped)) {
|
return [[mapped, v]];
|
}
|
return [];
|
}
|
|
function compareStaticPriority(a, b) {
|
if (!a) return true;
|
if (!!b.important !== !!a.important) return !!b.important;
|
if (!!b.inline !== !!a.inline) return !!b.inline;
|
for (let i = 0; i < 3; i++) {
|
if ((b.specificity[i] || 0) !== (a.specificity[i] || 0)) {
|
return (b.specificity[i] || 0) > (a.specificity[i] || 0);
|
}
|
}
|
return b.order >= a.order;
|
}
|
|
function staticSpecificity(selector) {
|
const noWhere = selector.replace(/:where\([^)]*\)/g, '');
|
const ids = (noWhere.match(/#[\w-]+/g) || []).length;
|
const classes = (noWhere.match(/\.[\w-]+|\[[^\]]+\]|:(?!:)[\w-]+(?:\([^)]*\))?/g) || []).length;
|
const stripped = noWhere
|
.replace(/#[\w-]+/g, ' ')
|
.replace(/\.[\w-]+|\[[^\]]+\]|:{1,2}[\w-]+(?:\([^)]*\))?/g, ' ')
|
.replace(/[*>+~(),]/g, ' ');
|
const types = (stripped.match(/\b[a-zA-Z][\w-]*\b/g) || []).length;
|
return [ids, classes, types];
|
}
|
|
function applyStaticDeclaration(specified, node, prop, value, meta) {
|
let map = specified.get(node);
|
if (!map) { map = new Map(); specified.set(node, map); }
|
for (const [expandedProp, expandedValue] of expandStaticDeclaration(prop, value)) {
|
const existing = map.get(expandedProp);
|
const next = { ...meta, prop: expandedProp, value: expandedValue };
|
if (compareStaticPriority(existing, next)) map.set(expandedProp, next);
|
}
|
}
|
|
function parseStaticStyleAttribute(styleText, orderBase = 0) {
|
const decls = [];
|
for (const part of String(styleText || '').split(';')) {
|
const idx = part.indexOf(':');
|
if (idx <= 0) continue;
|
const prop = part.slice(0, idx).trim();
|
let value = part.slice(idx + 1).trim();
|
const important = /!important\s*$/i.test(value);
|
value = value.replace(/\s*!important\s*$/i, '').trim();
|
decls.push({ prop, value, important, order: orderBase + decls.length });
|
}
|
return decls;
|
}
|
|
function collectStaticCssRules(cssText, csstree) {
|
const rules = [];
|
let ast;
|
try {
|
ast = csstree.parse(cssText, { positions: false, parseValue: true, parseCustomProperty: false });
|
} catch {
|
return rules;
|
}
|
let order = 0;
|
const walkList = (list, atRuleStack = []) => {
|
list?.forEach?.(node => {
|
if (node.type === 'Rule' && node.block) {
|
if (atRuleStack.some(name => /keyframes$/i.test(name))) return;
|
const selectorText = csstree.generate(node.prelude).trim();
|
const declarations = [];
|
node.block.children?.forEach?.(child => {
|
if (child.type !== 'Declaration') return;
|
declarations.push({
|
prop: child.property,
|
value: csstree.generate(child.value).trim(),
|
important: !!child.important,
|
});
|
});
|
for (const selector of splitCssList(selectorText)) {
|
if (!selector) continue;
|
// :hover rules can't be matched statically as-is (no interaction
|
// state), but they carry real cascade weight while hovered. Tag
|
// them and record a state-stripped selector so the hover pass can
|
// find their targets; specificity stays computed from the ORIGINAL
|
// selector (per CSS, :hover counts as a class).
|
const isHover = /:hover\b/i.test(selector);
|
let matchSelector = null;
|
if (isHover) {
|
matchSelector = selector.replace(/:hover\b/gi, '').trim();
|
if (!matchSelector || /[>+~]\s*$/.test(matchSelector)) matchSelector = null;
|
else matchSelector = matchSelector.replace(/(^|[\s>+~])(?=$|[\s>+~])/g, '$1*');
|
}
|
rules.push({ selector, declarations, specificity: staticSpecificity(selector), order: order++, isHover, matchSelector });
|
}
|
return;
|
}
|
if (node.type === 'Atrule' && node.block) {
|
const name = String(node.name || '').toLowerCase();
|
if (name === 'media' || name === 'supports' || name === 'layer') {
|
walkList(node.block.children, [...atRuleStack, name]);
|
}
|
}
|
});
|
};
|
walkList(ast.children);
|
return rules;
|
}
|
|
class StaticElement {
|
constructor(node, doc) {
|
this.node = node;
|
this._doc = doc;
|
this.nodeType = 1;
|
this.tagName = String(node.name || '').toUpperCase();
|
this.nodeName = this.tagName;
|
}
|
get parentElement() {
|
let cur = this.node.parent;
|
while (cur && cur.type !== 'tag') cur = cur.parent;
|
return cur ? this._doc.wrap(cur) : null;
|
}
|
get previousElementSibling() {
|
let cur = this.node.prev;
|
while (cur && cur.type !== 'tag') cur = cur.prev;
|
return cur ? this._doc.wrap(cur) : null;
|
}
|
get children() {
|
return (this.node.children || []).filter(child => child.type === 'tag').map(child => this._doc.wrap(child));
|
}
|
get childNodes() {
|
return (this.node.children || []).map(child => {
|
if (child.type === 'text') return { nodeType: 3, textContent: child.data || '' };
|
if (child.type === 'tag') return this._doc.wrap(child);
|
return { nodeType: 8, textContent: child.data || '' };
|
});
|
}
|
get textContent() {
|
return this._doc.domutils.textContent(this.node);
|
}
|
get className() {
|
return this.getAttribute('class') || '';
|
}
|
get id() {
|
return this.getAttribute('id') || '';
|
}
|
getAttribute(name) {
|
return this.node.attribs?.[name] ?? null;
|
}
|
querySelector(selector) {
|
try {
|
const found = this._doc.selectOne(selector, this.node.children || []);
|
return found ? this._doc.wrap(found) : null;
|
} catch {
|
return null;
|
}
|
}
|
querySelectorAll(selector) {
|
try {
|
return this._doc.selectAll(selector, this.node.children || []).map(node => this._doc.wrap(node));
|
} catch {
|
return [];
|
}
|
}
|
closest(selector) {
|
let cur = this.node;
|
while (cur && cur.type === 'tag') {
|
try {
|
if (this._doc.is(cur, selector)) return this._doc.wrap(cur);
|
} catch {
|
return null;
|
}
|
cur = cur.parent;
|
while (cur && cur.type !== 'tag') cur = cur.parent;
|
}
|
return null;
|
}
|
contains(other) {
|
let cur = other?.node || null;
|
while (cur) {
|
if (cur === this.node) return true;
|
cur = cur.parent;
|
}
|
return false;
|
}
|
}
|
|
class StaticDocument {
|
constructor(root, modules) {
|
this.root = root;
|
this.selectAll = modules.selectAll;
|
this.selectOne = modules.selectOne;
|
this.is = modules.is;
|
this.domutils = modules.domutils;
|
this._wrappers = new WeakMap();
|
this._styleMap = new WeakMap();
|
this._hoverStyleMap = new WeakMap();
|
this._accentDashPseudo = new WeakSet();
|
// Elements whose ::before/::after paints a full-cover opaque surface
|
// (position absolute/fixed + inset 0 + solid background). The pseudo is
|
// the element's visible background for contrast purposes even though it
|
// never joins the element cascade.
|
this._pseudoSurface = new WeakMap();
|
}
|
wrap(node) {
|
let wrapped = this._wrappers.get(node);
|
if (!wrapped) {
|
wrapped = new StaticElement(node, this);
|
this._wrappers.set(node, wrapped);
|
}
|
return wrapped;
|
}
|
querySelectorAll(selector) {
|
try {
|
return this.selectAll(selector, this.root.children || []).map(node => this.wrap(node));
|
} catch {
|
return [];
|
}
|
}
|
querySelector(selector) {
|
try {
|
const found = this.selectOne(selector, this.root.children || []);
|
return found ? this.wrap(found) : null;
|
} catch {
|
return null;
|
}
|
}
|
get documentElement() {
|
return this.querySelector('html');
|
}
|
get body() {
|
return this.querySelector('body');
|
}
|
setStyle(node, style) {
|
this._styleMap.set(node, style);
|
}
|
getStyle(el) {
|
return this._styleMap.get(el.node) || makeStaticStyle();
|
}
|
setHoverStyle(node, style) {
|
this._hoverStyleMap.set(node, style);
|
}
|
getHoverStyle(el) {
|
return this._hoverStyleMap.get(el.node) || null;
|
}
|
setAccentDashPseudo(node) {
|
this._accentDashPseudo.add(node);
|
}
|
hasAccentDashPseudo(el) {
|
return this._accentDashPseudo.has(el.node);
|
}
|
setPseudoSurface(node, color) {
|
this._pseudoSurface.set(node, color);
|
}
|
getPseudoSurface(el) {
|
return this._pseudoSurface.get(el.node) || null;
|
}
|
}
|
|
function makeStaticStyle(values = {}) {
|
const style = { ...STATIC_DEFAULT_STYLE, ...values };
|
style.getPropertyValue = (prop) => {
|
const key = cssPropToCamel(prop);
|
return style[key] || style[prop] || '';
|
};
|
return style;
|
}
|
|
function buildStaticWindow(staticDoc) {
|
return {
|
document: staticDoc,
|
getComputedStyle: (el) => staticDoc.getStyle(el),
|
getHoverStyle: (el) => staticDoc.getHoverStyle(el),
|
hasAccentDashPseudo: (el) => staticDoc.hasAccentDashPseudo(el),
|
getPseudoSurface: (el) => staticDoc.getPseudoSurface(el),
|
};
|
}
|
|
function collectStaticCssText(root, fileDir, profile, filePath, modules) {
|
const styleTexts = [];
|
for (const styleEl of modules.selectAll('style', root.children || [])) {
|
styleTexts.push(modules.domutils.textContent(styleEl));
|
}
|
const links = modules.selectAll('link', root.children || []);
|
for (const link of links) {
|
const rel = link.attribs?.rel || '';
|
const href = link.attribs?.href || '';
|
if (!/\bstylesheet\b/i.test(rel) || !href || /^(https?:)?\/\//i.test(href)) continue;
|
// Cache-busting hrefs (styles.css?v=3) resolve to the file, not to a
|
// literal path with the query in it; a versioned link otherwise made the
|
// whole stylesheet invisible to every element-level check.
|
const cssPath = path.resolve(fileDir, href.split(/[?#]/)[0]);
|
try {
|
const css = profileStep(profile, {
|
engine: 'static-html',
|
phase: 'preprocess',
|
ruleId: 'inline-linked-stylesheet',
|
target: filePath,
|
detail: href,
|
}, () => fs.readFileSync(cssPath, 'utf-8'));
|
styleTexts.push(css);
|
} catch { /* skip unreadable */ }
|
}
|
return styleTexts.join('\n');
|
}
|
|
function buildStaticStyleMap(root, staticDoc, cssText, modules, profile, filePath) {
|
const specified = new Map();
|
// Declarations from :hover rules, matched via their state-stripped
|
// selectors. Merged per-property against the resting cascade in
|
// computeNode — a hover declaration only takes effect if it would win
|
// the cascade while the element is hovered (all resting rules still
|
// apply in that state).
|
const hoverSpecified = new Map();
|
const rootCustomProps = collectCssCustomProps(cssText);
|
const allNodes = modules.selectAll('*', root.children || []);
|
const rules = profileStep(profile, {
|
engine: 'static-html',
|
phase: 'parse-css',
|
ruleId: 'css-rules',
|
target: filePath,
|
}, () => collectStaticCssRules(cssText, modules.csstree));
|
|
profileStep(profile, {
|
engine: 'static-html',
|
phase: 'selector-match',
|
ruleId: 'css-selectors',
|
target: filePath,
|
}, () => {
|
for (const rule of rules) {
|
// ::before/::after rules can't join the element cascade (pseudo
|
// elements aren't DOM nodes), but one shape matters to the eyebrow
|
// check: the short chromatic "kicker dash" (content box 8-80px wide,
|
// 1-6px tall, accent-colored fill). Mark the base-selector matches
|
// so checkElementHeroEyebrow can see the dash.
|
if (!rule.isHover) {
|
const pm = rule.selector.match(/^(.+?)\s*::?(?:before|after)$/i);
|
if (pm) {
|
const decls = new Map();
|
for (const d of rule.declarations) decls.set(d.prop.toLowerCase(), d.value);
|
const w = cssLengthToPx(resolveVarRefs(decls.get('width') || decls.get('inline-size') || '', rootCustomProps));
|
const h = cssLengthToPx(resolveVarRefs(decls.get('height') || decls.get('block-size') || '', rootCustomProps));
|
if (w != null && h != null && w >= 8 && w <= 80 && h >= 1 && h <= 6) {
|
const bgRaw = String(resolveVarRefs(decls.get('background-color') || decls.get('background') || '', rootCustomProps));
|
const token = bgRaw.match(/(?:rgba?|hsla?|oklch|oklab|lab|lch|hwb|color-mix)\([^)]*(?:\([^)]*\))?[^)]*\)|#[0-9a-f]{3,8}\b/i);
|
const c = parseAnyColor(token ? token[0] : bgRaw);
|
if (c && (c.a ?? 1) >= 0.1 && Math.max(c.r, c.g, c.b) - Math.min(c.r, c.g, c.b) >= 30) {
|
try {
|
for (const node of modules.selectAll(pm[1], root.children || [])) {
|
staticDoc.setAccentDashPseudo(node);
|
}
|
} catch { /* unsupported base selector */ }
|
}
|
}
|
// Full-cover surface pseudo: the CTA construction where the
|
// element itself stays transparent and a ::before/::after with
|
// position absolute/fixed + inset 0 (or all four sides 0, or
|
// 100% width and height) plus an opaque background paints the
|
// visible surface. Mark base-selector matches so the contrast
|
// checks measure text against the surface the browser renders.
|
const pseudoPos = String(decls.get('position') || '').toLowerCase();
|
if (pseudoPos === 'absolute' || pseudoPos === 'fixed') {
|
const zeroLen = v => v != null && /^0(?:px)?$/.test(String(v).trim());
|
const insetRaw = String(decls.get('inset') || '').trim();
|
const coversBox = (insetRaw !== '' && insetRaw.split(/\s+/).every(t => /^0(?:px)?$/.test(t)))
|
|| ['top', 'right', 'bottom', 'left'].every(side => zeroLen(decls.get(side)))
|
|| (String(decls.get('width') || '').trim() === '100%'
|
&& String(decls.get('height') || '').trim() === '100%');
|
if (coversBox && decls.has('content')) {
|
const surfRaw = String(resolveVarRefs(decls.get('background-color') || decls.get('background') || '', rootCustomProps));
|
const surfToken = surfRaw.match(/(?:rgba?|hsla?|oklch|oklab|lab|lch|hwb|color-mix)\([^)]*(?:\([^)]*\))?[^)]*\)|#[0-9a-f]{3,8}\b/i);
|
const surf = parseAnyColor(surfToken ? surfToken[0] : surfRaw);
|
if (surf && (surf.a ?? 1) >= 0.9 && !/gradient/i.test(surfRaw)) {
|
try {
|
for (const node of modules.selectAll(pm[1], root.children || [])) {
|
staticDoc.setPseudoSurface(node, surf);
|
}
|
} catch { /* unsupported base selector */ }
|
}
|
}
|
}
|
continue;
|
}
|
}
|
const matchSelector = rule.isHover ? rule.matchSelector : rule.selector;
|
if (!matchSelector) continue;
|
let matched;
|
try {
|
matched = modules.selectAll(matchSelector, root.children || []);
|
} catch {
|
recordProfileEvent(profile, {
|
engine: 'static-html',
|
phase: 'selector-match',
|
ruleId: 'unsupported-selector',
|
target: filePath,
|
ms: 0,
|
findings: 0,
|
detail: matchSelector,
|
});
|
continue;
|
}
|
for (const node of matched) {
|
for (const decl of rule.declarations) {
|
applyStaticDeclaration(rule.isHover ? hoverSpecified : specified, node, decl.prop, decl.value, {
|
important: decl.important,
|
specificity: rule.specificity,
|
order: rule.order,
|
inline: false,
|
});
|
}
|
}
|
}
|
|
let inlineOrder = rules.length + 1;
|
for (const node of allNodes) {
|
const styleText = node.attribs?.style;
|
if (!styleText) continue;
|
for (const decl of parseStaticStyleAttribute(styleText, inlineOrder)) {
|
applyStaticDeclaration(specified, node, decl.prop, decl.value, {
|
important: decl.important,
|
specificity: [1, 0, 0],
|
order: decl.order,
|
inline: true,
|
});
|
}
|
inlineOrder += 1000;
|
}
|
});
|
|
const computeNode = (node, parentStyle = null, parentCustom = new Map()) => {
|
const specifiedMap = specified.get(node) || new Map();
|
const customProps = new Map(parentCustom);
|
for (const [prop, decl] of specifiedMap) {
|
if (prop.startsWith('--')) customProps.set(prop, resolveVarRefs(decl.value, customProps));
|
}
|
const values = {};
|
for (const prop of Object.keys(STATIC_DEFAULT_STYLE)) {
|
if (STATIC_INHERITED_PROPS.has(prop) && parentStyle?.[prop] != null) values[prop] = parentStyle[prop];
|
else values[prop] = STATIC_DEFAULT_STYLE[prop];
|
}
|
for (const [prop, decl] of specifiedMap) {
|
if (prop.startsWith('--')) continue;
|
values[prop] = normalizeStaticCssValue(prop, decl.value, customProps, parentStyle, values);
|
}
|
const style = makeStaticStyle(values);
|
staticDoc.setStyle(node, style);
|
|
// Hover pass: limited to the two properties the hover-contrast check
|
// consumes. A hover declaration wins only if it beats the resting
|
// winner for that property under normal cascade rules (specificity /
|
// order / importance) — exactly what a browser computes while the
|
// element is hovered.
|
const hoverMap = hoverSpecified.get(node);
|
if (hoverMap) {
|
let hoverValues = null;
|
for (const prop of ['color', 'backgroundColor']) {
|
const hoverDecl = hoverMap.get(prop);
|
if (!hoverDecl) continue;
|
const restingDecl = specifiedMap.get(prop);
|
if (!compareStaticPriority(restingDecl, hoverDecl)) continue;
|
const next = normalizeStaticCssValue(prop, hoverDecl.value, customProps, parentStyle, values);
|
if (next === values[prop]) continue;
|
if (!hoverValues) hoverValues = { ...values };
|
hoverValues[prop] = next;
|
}
|
if (hoverValues) staticDoc.setHoverStyle(node, makeStaticStyle(hoverValues));
|
}
|
|
for (const child of node.children || []) {
|
if (child.type === 'tag') computeNode(child, style, customProps);
|
}
|
};
|
|
profileStep(profile, {
|
engine: 'static-html',
|
phase: 'cascade',
|
ruleId: 'compute-styles',
|
target: filePath,
|
}, () => {
|
for (const child of root.children || []) {
|
if (child.type === 'tag') computeNode(child);
|
}
|
});
|
}
|
|
export {
|
BORDER_SHORTHAND_RE,
|
NAMED_COLORS,
|
normalizeColorForCheck,
|
buildBorderOverrideMap,
|
unwrapCssAtLayer,
|
STATIC_INHERITED_PROPS,
|
STATIC_DEFAULT_STYLE,
|
STATIC_PROP_MAP,
|
STATIC_NAMED_COLORS,
|
splitCssList,
|
splitCssTokens,
|
cssPropToCamel,
|
staticColorToCss,
|
parseStaticColor,
|
extractStaticColor,
|
normalizeStaticCssValue,
|
expandStaticBoxValues,
|
parseStaticBorder,
|
parseStaticFont,
|
parseStaticTransition,
|
parseStaticAnimation,
|
expandStaticDeclaration,
|
compareStaticPriority,
|
staticSpecificity,
|
applyStaticDeclaration,
|
parseStaticStyleAttribute,
|
collectStaticCssRules,
|
StaticElement,
|
StaticDocument,
|
makeStaticStyle,
|
buildStaticWindow,
|
collectStaticCssText,
|
buildStaticStyleMap,
|
};
|
