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import type { AnyNode } from 'domhandler';
// --- Types ---
export interface ColorGroup {
color: string;
elements: string[];
}
export interface SvgAnalysis {
isMulticolor: boolean;
colorGroups: ColorGroup[];
viewBox: string;
width: string;
height: string;
}
export interface LayerSvg {
layerIndex: number;
color: string;
svgContent: string;
}
export interface MulticolorLayerInfo {
layerIndex: number;
glyphName: string;
unicode: string;
color: string;
encodedCode: number;
}
export interface MulticolorIconInfo {
originalName: string;
layerCount: number;
layers: MulticolorLayerInfo[];
}
export type MulticolorMap = Record<string, MulticolorIconInfo>;
export interface CreateSVGResult {
unicodeObject: Record<string, string>;
multicolorMap: MulticolorMap;
}
// --- Named CSS colors map (subset of most common) ---
const CSS_COLORS: Record<string, string> = {
black: '#000000', white: '#ffffff', red: '#ff0000', green: '#008000', blue: '#0000ff',
yellow: '#ffff00', cyan: '#00ffff', magenta: '#ff00ff', orange: '#ffa500', purple: '#800080',
pink: '#ffc0cb', gray: '#808080', grey: '#808080', silver: '#c0c0c0', maroon: '#800000',
olive: '#808000', lime: '#00ff00', aqua: '#00ffff', teal: '#008080', navy: '#000080',
fuchsia: '#ff00ff', brown: '#a52a2a', coral: '#ff7f50', crimson: '#dc143c', gold: '#ffd700',
indigo: '#4b0082', ivory: '#fffff0', khaki: '#f0e68c', lavender: '#e6e6fa', linen: '#faf0e6',
orchid: '#da70d6', peru: '#cd853f', plum: '#dda0dd', salmon: '#fa8072', sienna: '#a0522d',
tan: '#d2b48c', thistle: '#d8bfd8', tomato: '#ff6347', turquoise: '#40e0d0', violet: '#ee82ee',
wheat: '#f5deb3', darkblue: '#00008b', darkgreen: '#006400', darkred: '#8b0000',
darkgray: '#a9a9a9', darkgrey: '#a9a9a9', lightblue: '#add8e6', lightgreen: '#90ee90',
lightgray: '#d3d3d3', lightgrey: '#d3d3d3', lightpink: '#ffb6c1', lightyellow: '#ffffe0',
};
// --- Color normalization ---
export function normalizeColor(color: string): string {
if (!color) return '#000000';
const trimmed = color.trim().toLowerCase();
if (trimmed === 'none' || trimmed === 'transparent') return 'none';
if (trimmed === 'currentcolor') return 'currentColor';
// Already hex
if (trimmed.startsWith('#')) {
if (trimmed.length === 4) {
// #abc -> #aabbcc
return '#' + trimmed[1] + trimmed[1] + trimmed[2] + trimmed[2] + trimmed[3] + trimmed[3];
}
return trimmed;
}
// rgb(r, g, b) or rgba(r, g, b, a)
const rgbMatch = trimmed.match(/^rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/);
if (rgbMatch) {
const r = parseInt(rgbMatch[1], 10).toString(16).padStart(2, '0');
const g = parseInt(rgbMatch[2], 10).toString(16).padStart(2, '0');
const b = parseInt(rgbMatch[3], 10).toString(16).padStart(2, '0');
return `#${r}${g}${b}`;
}
// Named CSS color
if (CSS_COLORS[trimmed]) {
return CSS_COLORS[trimmed];
}
// Fallback: return as-is (e.g. url(#gradient))
return trimmed;
}
// --- Resolve effective fill ---
export function resolveEffectiveFill($: CheerioAPI, $el: Cheerio<AnyNode>): string {
// Check the element itself first
const fill = $el.attr('fill');
if (fill !== undefined && fill !== null) {
return fill;
}
// Walk up parent <g> elements
let $parent = $el.parent();
while ($parent.length > 0) {
const tagName = ($parent[0] as any)?.tagName || ($parent[0] as any)?.name;
if (tagName === 'svg') break;
const parentFill = $parent.attr('fill');
if (parentFill !== undefined && parentFill !== null) {
return parentFill;
}
$parent = $parent.parent();
}
// SVG default fill is black
return '#000000';
}
// --- Analyze SVG colors ---
export function analyzeSvgColors(svgContent: string): SvgAnalysis {
const $ = load(svgContent, { xmlMode: true });
const svg = $('svg');
const viewBox = svg.attr('viewBox') || '0 0 24 24';
const width = svg.attr('width') || '24';
const height = svg.attr('height') || '24';
const shapeSelectors = 'path, rect, circle, ellipse, polygon, polyline, line';
const colorMap = new Map<string, string[]>();
$(shapeSelectors).each((_, el) => {
const $el = $(el);
const fill = resolveEffectiveFill($, $el);
const normalized = normalizeColor(fill);
// Skip invisible elements
if (normalized === 'none') return;
// Skip gradient/pattern fills (url references)
if (normalized.startsWith('url(')) return;
if (!colorMap.has(normalized)) {
colorMap.set(normalized, []);
}
// Serialize this element, preserving transforms from parent <g> groups
const elHtml = serializeElementWithTransforms($, $el);
colorMap.get(normalized)!.push(elHtml);
});
const colorGroups: ColorGroup[] = Array.from(colorMap.entries()).map(([color, elements]) => ({
color,
elements,
}));
return {
isMulticolor: colorGroups.length >= 2,
colorGroups,
viewBox,
width,
height,
};
}
// --- Serialize element with ancestor transforms ---
function serializeElementWithTransforms($: CheerioAPI, $el: Cheerio<AnyNode>): string {
const transforms: string[] = [];
// Collect transforms from ancestor <g> elements
let $parent = $el.parent();
while ($parent.length > 0) {
const tagName = ($parent[0] as any)?.tagName || ($parent[0] as any)?.name;
if (tagName === 'svg') break;
const transform = $parent.attr('transform');
if (transform) {
transforms.unshift(transform);
}
$parent = $parent.parent();
}
// Get the element HTML, strip fill attribute
let elHtml = $.html($el) || '';
elHtml = elHtml.replace(/\s*fill="[^"]*"/g, '');
// If there are ancestor transforms, wrap in <g> elements
if (transforms.length > 0) {
let wrapped = elHtml;
for (let i = transforms.length - 1; i >= 0; i--) {
wrapped = `<g transform="${transforms[i]}">${wrapped}</g>`;
}
return wrapped;
}
return elHtml;
}
// --- Generate layer SVGs ---
export function generateLayerSvgs(analysis: SvgAnalysis): LayerSvg[] {
return analysis.colorGroups.map((group, index) => {
const svgContent = [
`<svg xmlns="http://www.w3.org/2000/svg" viewBox="${analysis.viewBox}" width="${analysis.width}" height="${analysis.height}">`,
...group.elements,
'</svg>',
].join('\n');
return {
layerIndex: index,
color: group.color,
svgContent,
};
});
}
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