684 lines
26 KiB
JavaScript
684 lines
26 KiB
JavaScript
const fs = require('fs');
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const path = require('path');
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const DEFAULT_VIEWPORT = { width: 1440, height: 920 };
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const DEFAULT_LINE_COLOR = '#93a2b7';
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const REFERENCE_SVG_PATH = path.resolve(__dirname, '..', '..', 'FSE铁路线路图.svg');
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const escapeHTML = (s) => String(s || '')
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''');
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const clamp = (value, min, max) => Math.max(min, Math.min(max, value));
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const round = (value, step = 2) => Math.round(Number(value || 0) / step) * step;
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const toCode = (value) => String(value || '').trim();
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const normalizeName = (value) => String(value || '').trim().toLowerCase().replace(/\s+/g, '');
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const parseNumber = (value) => {
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const num = Number(value);
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return Number.isFinite(num) ? num : null;
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};
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const attrRegex = /([\w:-]+)="([^"]*)"/g;
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function parseAttributes(raw) {
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const attrs = {};
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if (!raw) return attrs;
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for (const match of raw.matchAll(attrRegex)) {
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attrs[match[1]] = match[2];
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}
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return attrs;
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}
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function parseReferenceSvgMeta() {
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try {
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if (!fs.existsSync(REFERENCE_SVG_PATH)) return { ...DEFAULT_VIEWPORT, anchorPoints: [] };
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const raw = fs.readFileSync(REFERENCE_SVG_PATH, 'utf8');
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const viewBoxMatch = raw.match(/viewBox="([\d.\s-]+)"/i);
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const widthMatch = raw.match(/\bwidth="([\d.]+)"/i);
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const heightMatch = raw.match(/\bheight="([\d.]+)"/i);
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let width = DEFAULT_VIEWPORT.width;
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let height = DEFAULT_VIEWPORT.height;
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if (viewBoxMatch) {
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const parts = viewBoxMatch[1].trim().split(/\s+/).map(Number);
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if (parts.length === 4 && Number.isFinite(parts[2]) && Number.isFinite(parts[3])) {
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width = parts[2];
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height = parts[3];
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}
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} else {
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width = parseNumber(widthMatch?.[1]) || width;
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height = parseNumber(heightMatch?.[1]) || height;
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}
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const circles = [];
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for (const match of raw.matchAll(/<circle\b([^>]*)\/?>/gi)) {
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const attrs = parseAttributes(match[1]);
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const cx = parseNumber(attrs.cx);
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const cy = parseNumber(attrs.cy);
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const r = parseNumber(attrs.r);
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if (!Number.isFinite(cx) || !Number.isFinite(cy) || !Number.isFinite(r)) continue;
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circles.push({
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cx,
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cy,
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r,
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fill: attrs.fill || '',
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stroke: attrs.stroke || '',
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strokeWidth: parseNumber(attrs['stroke-width']) || 0
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});
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}
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const anchorCandidates = circles.filter((circle) => {
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if (circle.r < 4) return false;
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if (!circle.stroke || circle.stroke.toLowerCase() === 'none') return false;
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return true;
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});
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const clusters = [];
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for (const circle of anchorCandidates) {
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let target = null;
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for (const cluster of clusters) {
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const dx = cluster.x - circle.cx;
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const dy = cluster.y - circle.cy;
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const distance = Math.sqrt((dx * dx) + (dy * dy));
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if (distance <= 18) {
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target = cluster;
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break;
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}
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}
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if (!target) {
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target = { x: circle.cx, y: circle.cy, count: 0 };
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clusters.push(target);
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}
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target.count += 1;
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target.x += (circle.cx - target.x) / target.count;
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target.y += (circle.cy - target.y) / target.count;
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}
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const anchorPoints = clusters
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.sort((a, b) => (a.y - b.y) || (a.x - b.x))
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.map((point) => ({ x: point.x, y: point.y }));
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return { width, height, anchorPoints };
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} catch (_) {
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return { ...DEFAULT_VIEWPORT, anchorPoints: [] };
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}
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}
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function createUnionFind() {
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const parent = new Map();
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const find = (value) => {
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if (!parent.has(value)) parent.set(value, value);
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const root = parent.get(value);
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if (root !== value) {
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const collapsed = find(root);
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parent.set(value, collapsed);
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return collapsed;
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}
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return root;
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};
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const union = (a, b) => {
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if (!a || !b) return;
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const ra = find(a);
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const rb = find(b);
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if (ra !== rb) parent.set(rb, ra);
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};
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return { parent, find, union };
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}
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function buildTransferGroups(stations, transfers) {
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const uf = createUnionFind();
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const codesByName = new Map();
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for (const station of (stations || [])) {
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const code = toCode(station?.code);
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if (!code) continue;
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uf.find(code);
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const nameKey = `${normalizeName(station?.name || station?.cn_name || station?.station_name)}|${normalizeName(station?.en_name || station?.enName || station?.en)}`;
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if (nameKey !== '|') {
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if (!codesByName.has(nameKey)) codesByName.set(nameKey, []);
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codesByName.get(nameKey).push(code);
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}
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}
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for (const station of (stations || [])) {
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const from = toCode(station?.code);
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if (!from) continue;
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const transferTo = Array.isArray(station?.transfer_to) ? station.transfer_to : [];
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for (const item of transferTo) {
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const to = toCode((typeof item === 'string') ? item : (item?.code || item?.station || item?.id || item?.[0]));
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if (to) uf.union(from, to);
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}
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}
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for (const pair of (transfers || [])) {
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const from = toCode(pair?.[0]);
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const to = toCode(pair?.[1]);
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if (from && to) uf.union(from, to);
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}
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for (const group of codesByName.values()) {
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if (!Array.isArray(group) || group.length < 2) continue;
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for (let index = 1; index < group.length; index += 1) {
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uf.union(group[0], group[index]);
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}
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}
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const codesByCanonical = {};
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const canonicalByCode = {};
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for (const station of (stations || [])) {
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const code = toCode(station?.code);
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if (!code) continue;
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const canonical = uf.find(code);
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if (!codesByCanonical[canonical]) codesByCanonical[canonical] = [];
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codesByCanonical[canonical].push(code);
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}
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for (const root of Object.keys(codesByCanonical)) {
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const sortedCodes = Array.from(new Set(codesByCanonical[root])).sort((a, b) => a.localeCompare(b));
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const canonical = sortedCodes[0];
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delete codesByCanonical[root];
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codesByCanonical[canonical] = sortedCodes;
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for (const code of sortedCodes) canonicalByCode[code] = canonical;
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}
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return { canonicalByCode, codesByCanonical };
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}
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function buildNodes(stations, nameByCode, transferGroups) {
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const nodes = new Map();
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for (const station of (stations || [])) {
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const code = toCode(station?.code);
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if (!code) continue;
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const canonical = transferGroups.canonicalByCode[code] || code;
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const name = String(
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station?.name
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|| station?.cn_name
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|| station?.station_name
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|| nameByCode?.[code]
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|| code
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);
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const enName = String(station?.en_name || station?.enName || station?.en || '');
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const svgX = parseNumber(station?.svg_x);
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const svgY = parseNumber(station?.svg_y);
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if (!nodes.has(canonical)) {
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nodes.set(canonical, {
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canonical,
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codes: [],
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primaryCode: code,
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name,
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enName,
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lines: new Set(),
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explicitPositions: [],
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explicitLineIndices: [],
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isTransfer: false
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});
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}
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const node = nodes.get(canonical);
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node.codes.push(code);
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if (!node.name && name) node.name = name;
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if (!node.enName && enName) node.enName = enName;
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if (Number.isFinite(svgX) && Number.isFinite(svgY)) {
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node.explicitPositions.push({ x: svgX, y: svgY });
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}
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}
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return nodes;
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}
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function buildLineSegments(lines, transferGroups, nodeMap) {
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const segments = [];
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const uniqueEdgeSet = new Set();
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(lines || []).forEach((line, lineIndex) => {
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const color = line?.color || DEFAULT_LINE_COLOR;
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const lineId = String(line?.id || `line-${lineIndex + 1}`);
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const name = String(line?.name || line?.cn_name || line?.线路名称 || lineId);
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const enName = String(line?.en_name || line?.英文名称 || line?.英文名 || '');
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const stopsRaw = Array.isArray(line?.stations)
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? line.stations
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: (Array.isArray(line?.stops) ? line.stops : (Array.isArray(line?.站点列表) ? line.站点列表 : []));
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let current = [];
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const commitSegment = () => {
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const canonicalStops = [];
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for (const stop of current) {
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const code = toCode(stop);
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if (!code || code === '-') continue;
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const canonical = transferGroups.canonicalByCode[code] || code;
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if (canonicalStops[canonicalStops.length - 1] !== canonical) canonicalStops.push(canonical);
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const node = nodeMap.get(canonical);
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if (node) {
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node.lines.add(lineId);
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node.explicitLineIndices.push(lineIndex);
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}
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}
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if (canonicalStops.length < 2) {
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current = [];
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return;
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}
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segments.push({ id: lineId, name, enName, color, lineIndex, stops: canonicalStops });
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for (let index = 0; index < canonicalStops.length - 1; index += 1) {
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const a = canonicalStops[index];
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const b = canonicalStops[index + 1];
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uniqueEdgeSet.add([a, b].sort().join('|'));
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}
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current = [];
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};
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for (const stop of stopsRaw) {
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if (toCode(stop) === '-') {
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commitSegment();
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} else {
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current.push(stop);
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}
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}
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commitSegment();
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});
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return {
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segments,
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edges: Array.from(uniqueEdgeSet).map((key) => {
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const [from, to] = key.split('|');
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return { from, to };
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})
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};
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}
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function buildSeedLayout(nodeMap, lineSegments, referenceMeta) {
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const nodes = Array.from(nodeMap.values());
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const baseX = 140;
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const baseY = 120;
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const gapX = 96;
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const gapY = 92;
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const seed = {};
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const hasExplicitPositions = nodes.some((node) => node.explicitPositions.length > 0);
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if (hasExplicitPositions) {
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for (const node of nodes) {
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if (node.explicitPositions.length > 0) {
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const x = node.explicitPositions.reduce((sum, pos) => sum + pos.x, 0) / node.explicitPositions.length;
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const y = node.explicitPositions.reduce((sum, pos) => sum + pos.y, 0) / node.explicitPositions.length;
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seed[node.canonical] = { x, y, locked: true };
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}
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}
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}
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const occurrenceMap = {};
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for (const segment of lineSegments.segments) {
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segment.stops.forEach((canonical, stopIndex) => {
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if (!occurrenceMap[canonical]) occurrenceMap[canonical] = [];
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occurrenceMap[canonical].push({
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x: baseX + (stopIndex * gapX),
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y: baseY + (segment.lineIndex * gapY)
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});
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});
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}
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let fallbackIndex = 0;
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const fallbackCols = Math.max(4, Math.ceil(Math.sqrt(Math.max(nodes.length, 1))));
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for (const node of nodes) {
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if (!seed[node.canonical] && occurrenceMap[node.canonical]?.length) {
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const samples = occurrenceMap[node.canonical];
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seed[node.canonical] = {
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x: samples.reduce((sum, item) => sum + item.x, 0) / samples.length,
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y: samples.reduce((sum, item) => sum + item.y, 0) / samples.length,
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locked: false
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};
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}
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if (!seed[node.canonical]) {
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seed[node.canonical] = {
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x: baseX + ((fallbackIndex % fallbackCols) * gapX),
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y: baseY + (Math.floor(fallbackIndex / fallbackCols) * gapY),
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locked: false
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};
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fallbackIndex += 1;
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}
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}
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const anchorPoints = Array.isArray(referenceMeta?.anchorPoints) ? referenceMeta.anchorPoints : [];
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if (!hasExplicitPositions && anchorPoints.length >= nodes.length * 0.6) {
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const nodeOrder = nodes
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.map((node) => ({ node, seed: seed[node.canonical] }))
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.sort((a, b) => (a.seed.y - b.seed.y) || (a.seed.x - b.seed.x));
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const anchors = anchorPoints
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.slice()
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.sort((a, b) => (a.y - b.y) || (a.x - b.x));
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const limit = Math.min(nodeOrder.length, anchors.length);
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for (let index = 0; index < limit; index += 1) {
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const { node } = nodeOrder[index];
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const anchor = anchors[index];
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seed[node.canonical] = {
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x: (seed[node.canonical].x * 0.45) + (anchor.x * 0.55),
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y: (seed[node.canonical].y * 0.45) + (anchor.y * 0.55),
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locked: false
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};
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}
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}
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return seed;
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}
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function optimizeLayout(nodeMap, lineSegments, referenceMeta) {
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const nodes = Array.from(nodeMap.values());
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const seed = buildSeedLayout(nodeMap, lineSegments, referenceMeta);
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const positions = {};
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const velocities = {};
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const neighbors = new Map();
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for (const node of nodes) {
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positions[node.canonical] = {
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x: seed[node.canonical]?.x || 0,
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y: seed[node.canonical]?.y || 0
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};
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velocities[node.canonical] = { x: 0, y: 0 };
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neighbors.set(node.canonical, new Set());
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}
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for (const edge of lineSegments.edges) {
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neighbors.get(edge.from)?.add(edge.to);
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neighbors.get(edge.to)?.add(edge.from);
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}
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const iterations = 220;
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const repulsionBase = 18000;
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const springLength = 92;
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const springStrength = 0.012;
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const bendStrength = 0.018;
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const anchorStrength = 0.018;
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const damping = 0.82;
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for (let iteration = 0; iteration < iterations; iteration += 1) {
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const alpha = 1 - (iteration / iterations);
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const forces = {};
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for (const node of nodes) forces[node.canonical] = { x: 0, y: 0 };
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for (let i = 0; i < nodes.length; i += 1) {
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const a = nodes[i];
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const pa = positions[a.canonical];
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for (let j = i + 1; j < nodes.length; j += 1) {
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const b = nodes[j];
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const pb = positions[b.canonical];
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let dx = pa.x - pb.x;
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let dy = pa.y - pb.y;
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let distanceSq = (dx * dx) + (dy * dy);
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if (distanceSq < 1) {
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dx = 0.5 - Math.random();
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dy = 0.5 - Math.random();
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distanceSq = (dx * dx) + (dy * dy);
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}
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const distance = Math.sqrt(distanceSq);
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const scale = (repulsionBase * alpha) / distanceSq;
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const fx = (dx / distance) * scale;
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const fy = (dy / distance) * scale;
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forces[a.canonical].x += fx;
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forces[a.canonical].y += fy;
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forces[b.canonical].x -= fx;
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forces[b.canonical].y -= fy;
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}
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}
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for (const segment of lineSegments.segments) {
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for (let index = 0; index < segment.stops.length - 1; index += 1) {
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const from = segment.stops[index];
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const to = segment.stops[index + 1];
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const pa = positions[from];
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const pb = positions[to];
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let dx = pb.x - pa.x;
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let dy = pb.y - pa.y;
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let distance = Math.sqrt((dx * dx) + (dy * dy));
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if (distance < 1) distance = 1;
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const delta = distance - springLength;
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const force = delta * springStrength;
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const fx = (dx / distance) * force;
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const fy = (dy / distance) * force;
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forces[from].x += fx;
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forces[from].y += fy;
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forces[to].x -= fx;
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forces[to].y -= fy;
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}
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for (let index = 1; index < segment.stops.length - 1; index += 1) {
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const prev = positions[segment.stops[index - 1]];
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const current = positions[segment.stops[index]];
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const next = positions[segment.stops[index + 1]];
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const targetX = (prev.x + next.x) / 2;
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const targetY = (prev.y + next.y) / 2;
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forces[segment.stops[index]].x += (targetX - current.x) * bendStrength;
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forces[segment.stops[index]].y += (targetY - current.y) * bendStrength;
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}
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}
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for (const node of nodes) {
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const anchor = seed[node.canonical];
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if (!anchor) continue;
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const strength = anchor.locked ? 0.14 : anchorStrength;
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forces[node.canonical].x += (anchor.x - positions[node.canonical].x) * strength;
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forces[node.canonical].y += (anchor.y - positions[node.canonical].y) * strength;
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}
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for (const node of nodes) {
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const velocity = velocities[node.canonical];
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const force = forces[node.canonical];
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velocity.x = (velocity.x + (force.x * 0.6)) * damping;
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velocity.y = (velocity.y + (force.y * 0.6)) * damping;
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positions[node.canonical].x += velocity.x;
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positions[node.canonical].y += velocity.y;
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}
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}
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const xs = nodes.map((node) => positions[node.canonical].x);
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const ys = nodes.map((node) => positions[node.canonical].y);
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const minX = Math.min(...xs);
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const maxX = Math.max(...xs);
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const minY = Math.min(...ys);
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const maxY = Math.max(...ys);
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const sourceWidth = Math.max(maxX - minX, 1);
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const sourceHeight = Math.max(maxY - minY, 1);
|
|
const targetWidth = Math.max((referenceMeta?.width || DEFAULT_VIEWPORT.width) - 260, 640);
|
|
const targetHeight = Math.max((referenceMeta?.height || DEFAULT_VIEWPORT.height) - 220, 420);
|
|
const scale = Math.min(targetWidth / sourceWidth, targetHeight / sourceHeight);
|
|
const offsetX = 130;
|
|
const offsetY = 110;
|
|
|
|
for (const node of nodes) {
|
|
const point = positions[node.canonical];
|
|
point.x = round(((point.x - minX) * scale) + offsetX, 2);
|
|
point.y = round(((point.y - minY) * scale) + offsetY, 2);
|
|
}
|
|
|
|
return positions;
|
|
}
|
|
|
|
function buildLinePath(points) {
|
|
if (!Array.isArray(points) || points.length === 0) return '';
|
|
let d = `M ${points[0].x} ${points[0].y}`;
|
|
for (let index = 1; index < points.length; index += 1) {
|
|
d += ` L ${points[index].x} ${points[index].y}`;
|
|
}
|
|
return d;
|
|
}
|
|
|
|
function getContrastColor(hex) {
|
|
if (!hex) return '#ffffff';
|
|
let value = String(hex).replace('#', '');
|
|
if (value.length === 3) value = value.split('').map((item) => item + item).join('');
|
|
const r = parseInt(value.slice(0, 2), 16) || 0;
|
|
const g = parseInt(value.slice(2, 4), 16) || 0;
|
|
const b = parseInt(value.slice(4, 6), 16) || 0;
|
|
const yiq = ((r * 299) + (g * 587) + (b * 114)) / 1000;
|
|
return yiq >= 140 ? '#0f172a' : '#ffffff';
|
|
}
|
|
|
|
function piePath(cx, cy, r, a0, a1) {
|
|
const x0 = cx + (r * Math.cos(a0));
|
|
const y0 = cy + (r * Math.sin(a0));
|
|
const x1 = cx + (r * Math.cos(a1));
|
|
const y1 = cy + (r * Math.sin(a1));
|
|
const largeArc = (a1 - a0) > Math.PI ? 1 : 0;
|
|
return `M ${cx} ${cy} L ${x0} ${y0} A ${r} ${r} 0 ${largeArc} 1 ${x1} ${y1} Z`;
|
|
}
|
|
|
|
function pieSvg(cx, cy, r, colors) {
|
|
const palette = Array.from(new Set((Array.isArray(colors) ? colors : []).filter(Boolean))).slice(0, 4);
|
|
if (palette.length === 0) return '';
|
|
if (palette.length === 1) return `<circle cx="${cx}" cy="${cy}" r="${r}" fill="${escapeHTML(palette[0])}" />`;
|
|
const step = (Math.PI * 2) / palette.length;
|
|
let output = '';
|
|
for (let index = 0; index < palette.length; index += 1) {
|
|
const a0 = (-Math.PI / 2) + (index * step);
|
|
const a1 = a0 + step;
|
|
output += `<path d="${piePath(cx, cy, r, a0, a1)}" fill="${escapeHTML(palette[index])}" />`;
|
|
}
|
|
return output;
|
|
}
|
|
|
|
function renderStation(node, point, lineColorMap) {
|
|
const colors = Array.from(node.lines)
|
|
.map((lineId) => lineColorMap.get(lineId) || DEFAULT_LINE_COLOR)
|
|
.filter(Boolean);
|
|
const uniqueColors = Array.from(new Set(colors));
|
|
const isTransfer = node.isTransfer || uniqueColors.length >= 2 || node.codes.length >= 2;
|
|
const code = escapeHTML(node.primaryCode);
|
|
const name = escapeHTML(node.name || node.primaryCode);
|
|
const enName = escapeHTML(node.enName || '');
|
|
const x = point.x;
|
|
const y = point.y;
|
|
const codeFontSize = 9;
|
|
const nameFontSize = 13;
|
|
const enFontSize = 8.5;
|
|
const codeWidth = Math.max((node.primaryCode || '').length * 6 + 10, 28);
|
|
const preferTop = isTransfer;
|
|
|
|
let markerSvg = '';
|
|
if (isTransfer) {
|
|
markerSvg += `<circle cx="${x}" cy="${y}" r="15" fill="#ffffff" stroke="#1f2937" stroke-width="2.5" />`;
|
|
markerSvg += pieSvg(x, y, 11.5, uniqueColors);
|
|
markerSvg += `<circle class="node-core" cx="${x}" cy="${y}" r="6.5" fill="#ffffff" stroke="#334155" stroke-width="2.25" />`;
|
|
} else {
|
|
const color = uniqueColors[0] || DEFAULT_LINE_COLOR;
|
|
markerSvg += `<circle cx="${x}" cy="${y}" r="12.5" fill="#ffffff" stroke="${escapeHTML(color)}" stroke-width="5" />`;
|
|
markerSvg += `<circle class="node-core" cx="${x}" cy="${y}" r="7" fill="#ffffff" stroke="#334155" stroke-width="2.25" />`;
|
|
}
|
|
|
|
let textSvg = '';
|
|
if (preferTop) {
|
|
const baseY = y - 14;
|
|
const enY = baseY;
|
|
const nameY = enName ? (baseY - 12) : baseY;
|
|
const codeY = nameY - 16;
|
|
textSvg += `<rect x="${x - (codeWidth / 2)}" y="${codeY - 8}" width="${codeWidth}" height="12" rx="6" fill="#ffffff" stroke="#cbd5e1" stroke-width="1.5" />`;
|
|
textSvg += `<text x="${x}" y="${codeY + 1}" text-anchor="middle" fill="#64748b" font-size="${codeFontSize}" font-weight="700" letter-spacing="0.02em">${code}</text>`;
|
|
textSvg += `<text x="${x}" y="${nameY}" text-anchor="middle" fill="#0f172a" font-size="${nameFontSize}" font-weight="800" stroke="#ffffff" stroke-width="4" stroke-linejoin="round" paint-order="stroke fill">${name}</text>`;
|
|
if (enName) {
|
|
textSvg += `<text x="${x}" y="${enY}" text-anchor="middle" fill="#64748b" font-size="${enFontSize}" font-weight="700" stroke="#ffffff" stroke-width="3" stroke-linejoin="round" paint-order="stroke fill">${enName}</text>`;
|
|
}
|
|
} else {
|
|
const topY = y + 24;
|
|
const codeY = topY;
|
|
const nameY = topY + 16;
|
|
const enY = nameY + 12;
|
|
textSvg += `<rect x="${x - (codeWidth / 2)}" y="${codeY - 8}" width="${codeWidth}" height="12" rx="6" fill="#ffffff" stroke="#cbd5e1" stroke-width="1.5" />`;
|
|
textSvg += `<text x="${x}" y="${codeY + 1}" text-anchor="middle" fill="#64748b" font-size="${codeFontSize}" font-weight="700" letter-spacing="0.02em">${code}</text>`;
|
|
textSvg += `<text x="${x}" y="${nameY}" text-anchor="middle" fill="#0f172a" font-size="${nameFontSize}" font-weight="800" stroke="#ffffff" stroke-width="4" stroke-linejoin="round" paint-order="stroke fill">${name}</text>`;
|
|
if (enName) {
|
|
textSvg += `<text x="${x}" y="${enY}" text-anchor="middle" fill="#64748b" font-size="${enFontSize}" font-weight="700" stroke="#ffffff" stroke-width="3" stroke-linejoin="round" paint-order="stroke fill">${enName}</text>`;
|
|
}
|
|
}
|
|
|
|
return `
|
|
<g class="map-station ${isTransfer ? 'transfer' : ''}" data-code="${code}" data-canonical="${escapeHTML(node.canonical)}" onclick="handleStationClick('${code}')" style="cursor:pointer">
|
|
<rect x="${x - 22}" y="${y - 22}" width="44" height="44" fill="transparent" />
|
|
${markerSvg}
|
|
${textSvg}
|
|
</g>
|
|
`;
|
|
}
|
|
|
|
function renderLineLabels(segment, points) {
|
|
if (!Array.isArray(points) || points.length < 2) return '';
|
|
const color = segment.color || DEFAULT_LINE_COLOR;
|
|
const textColor = getContrastColor(color);
|
|
const subTextColor = (textColor === '#ffffff') ? 'rgba(255,255,255,0.9)' : 'rgba(15,23,42,0.8)';
|
|
const labelWidth = Math.max(String(segment.name || '').length * 14 + 20, String(segment.enName || '').length * 7 + 20, 80);
|
|
const height = segment.enName ? 36 : 24;
|
|
const build = (point, alignLeft) => {
|
|
const x = alignLeft ? point.x - 54 - labelWidth : point.x + 54;
|
|
const y = point.y - (height / 2);
|
|
const textX = x + (labelWidth / 2);
|
|
let output = `<rect x="${x}" y="${y}" width="${labelWidth}" height="${height}" rx="6" fill="${escapeHTML(color)}" />`;
|
|
if (segment.enName) {
|
|
output += `<text x="${textX}" y="${y + 15}" text-anchor="middle" fill="${textColor}" font-size="12" font-weight="bold">${escapeHTML(segment.name)}</text>`;
|
|
output += `<text x="${textX}" y="${y + 28}" text-anchor="middle" fill="${subTextColor}" font-size="9" font-weight="600">${escapeHTML(segment.enName)}</text>`;
|
|
} else {
|
|
output += `<text x="${textX}" y="${y + 16}" text-anchor="middle" fill="${textColor}" font-size="12" font-weight="bold">${escapeHTML(segment.name)}</text>`;
|
|
}
|
|
return output;
|
|
};
|
|
|
|
return build(points[0], true) + build(points[points.length - 1], false);
|
|
}
|
|
|
|
function calculateBounds(positions) {
|
|
const items = Object.values(positions || {});
|
|
if (!items.length) return { minX: 0, minY: 0, maxX: DEFAULT_VIEWPORT.width, maxY: DEFAULT_VIEWPORT.height };
|
|
return {
|
|
minX: Math.min(...items.map((item) => item.x)),
|
|
minY: Math.min(...items.map((item) => item.y)),
|
|
maxX: Math.max(...items.map((item) => item.x)),
|
|
maxY: Math.max(...items.map((item) => item.y))
|
|
};
|
|
}
|
|
|
|
function generate(stations, lines, fares, nameByCode, transfers) {
|
|
const referenceMeta = parseReferenceSvgMeta();
|
|
const transferGroups = buildTransferGroups(stations, transfers);
|
|
const nodeMap = buildNodes(stations, nameByCode || {}, transferGroups);
|
|
const lineSegments = buildLineSegments(lines, transferGroups, nodeMap);
|
|
|
|
for (const node of nodeMap.values()) {
|
|
node.codes = Array.from(new Set(node.codes)).sort((a, b) => a.localeCompare(b));
|
|
node.primaryCode = node.codes[0] || node.primaryCode;
|
|
node.isTransfer = node.codes.length >= 2 || node.lines.size >= 2;
|
|
}
|
|
|
|
if (!nodeMap.size) {
|
|
return `<svg xmlns="http://www.w3.org/2000/svg" width="${DEFAULT_VIEWPORT.width}" height="${DEFAULT_VIEWPORT.height}" viewBox="0 0 ${DEFAULT_VIEWPORT.width} ${DEFAULT_VIEWPORT.height}" style="background:#ffffff"><text x="80" y="120" fill="#64748b" font-size="18" font-family="Inter, system-ui, sans-serif">暂无可显示的站点数据</text></svg>`;
|
|
}
|
|
|
|
const positions = optimizeLayout(nodeMap, lineSegments, referenceMeta);
|
|
const bounds = calculateBounds(positions);
|
|
const width = Math.max(referenceMeta.width || DEFAULT_VIEWPORT.width, Math.ceil(bounds.maxX + 180));
|
|
const height = Math.max(referenceMeta.height || DEFAULT_VIEWPORT.height, Math.ceil(bounds.maxY + 160));
|
|
const lineColorMap = new Map();
|
|
(lineSegments.segments || []).forEach((segment) => lineColorMap.set(segment.id, segment.color || DEFAULT_LINE_COLOR));
|
|
|
|
let svg = `<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}" viewBox="0 0 ${width} ${height}" style="background:#ffffff;font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif">`;
|
|
svg += `<metadata>generated-by=svg-generator; mode=network-map; reference-svg=${escapeHTML(path.basename(REFERENCE_SVG_PATH))}; stations=${nodeMap.size}; lineSegments=${lineSegments.segments.length}; fares=${Array.isArray(fares) ? fares.length : 0}</metadata>`;
|
|
svg += `<rect width="${width}" height="${height}" fill="#ffffff" />`;
|
|
|
|
for (const segment of lineSegments.segments) {
|
|
const points = segment.stops.map((canonical) => positions[canonical]).filter(Boolean);
|
|
if (points.length < 2) continue;
|
|
const d = buildLinePath(points);
|
|
svg += `<path d="${d}" fill="none" stroke="${escapeHTML(segment.color || DEFAULT_LINE_COLOR)}" stroke-width="8" stroke-linecap="round" stroke-linejoin="round" />`;
|
|
svg += renderLineLabels(segment, points);
|
|
}
|
|
|
|
const orderedNodes = Array.from(nodeMap.values()).sort((a, b) => {
|
|
const pa = positions[a.canonical];
|
|
const pb = positions[b.canonical];
|
|
return (pa.x - pb.x) || (pa.y - pb.y);
|
|
});
|
|
|
|
for (const node of orderedNodes) {
|
|
const point = positions[node.canonical];
|
|
if (!point) continue;
|
|
svg += renderStation(node, point, lineColorMap);
|
|
}
|
|
|
|
svg += `</svg>`;
|
|
return svg;
|
|
}
|
|
|
|
module.exports = { generate };
|