chessground-haichess
Version:
lichess.org Chess UI
231 lines • 37.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.setAttributes = exports.renderSvg = exports.createElement = void 0;
const util_1 = require("./util");
function createElement(tagName) {
return document.createElementNS('http://www.w3.org/2000/svg', tagName);
}
exports.createElement = createElement;
function renderSvg(state, svg, customSvg) {
const d = state.drawable, curD = d.current, cur = curD && curD.mouseSq ? curD : undefined, arrowDests = new Map(), bounds = state.dom.bounds();
for (const s of d.shapes.concat(d.autoShapes).concat(cur ? [cur] : [])) {
if (s.dest)
arrowDests.set(s.dest, (arrowDests.get(s.dest) || 0) + 1);
}
const shapes = d.shapes.concat(d.autoShapes).map((s) => {
return {
shape: s,
current: false,
hash: shapeHash(s, arrowDests, false, bounds),
};
});
if (cur)
shapes.push({
shape: cur,
current: true,
hash: shapeHash(cur, arrowDests, true, bounds),
});
const fullHash = shapes.map(sc => sc.hash).join(';');
if (fullHash === state.drawable.prevSvgHash)
return;
state.drawable.prevSvgHash = fullHash;
const defsEl = svg.querySelector('defs');
const shapesEl = svg.querySelector('g');
const customSvgsEl = customSvg.querySelector('g');
syncDefs(d, shapes, defsEl);
syncShapes(state, shapes.filter(s => !s.shape.customSvg), d.brushes, arrowDests, shapesEl);
syncShapes(state, shapes.filter(s => s.shape.customSvg), d.brushes, arrowDests, customSvgsEl);
}
exports.renderSvg = renderSvg;
function syncDefs(d, shapes, defsEl) {
const brushes = new Map();
let brush;
for (const s of shapes) {
if (s.shape.dest) {
brush = d.brushes[s.shape.brush];
if (s.shape.modifiers)
brush = makeCustomBrush(brush, s.shape.modifiers);
brushes.set(brush.key, brush);
}
}
const keysInDom = new Set();
let el = defsEl.firstChild;
while (el) {
keysInDom.add(el.getAttribute('cgKey'));
el = el.nextSibling;
}
for (const [key, brush] of brushes.entries()) {
if (!keysInDom.has(key))
defsEl.appendChild(renderMarker(brush));
}
}
function syncShapes(state, shapes, brushes, arrowDests, root) {
const bounds = state.dom.bounds(), hashesInDom = new Map(), toRemove = [];
for (const sc of shapes)
hashesInDom.set(sc.hash, false);
let el = root.firstChild, elHash;
while (el) {
elHash = el.getAttribute('cgHash');
if (hashesInDom.has(elHash))
hashesInDom.set(elHash, true);
else
toRemove.push(el);
el = el.nextSibling;
}
for (const el of toRemove)
root.removeChild(el);
for (const sc of shapes) {
if (!hashesInDom.get(sc.hash))
root.appendChild(renderShape(state, sc, brushes, arrowDests, bounds));
}
}
function shapeHash({ orig, dest, brush, piece, modifiers, customSvg }, arrowDests, current, bounds) {
return [
bounds.width,
bounds.height,
current,
orig,
dest,
brush,
dest && (arrowDests.get(dest) || 0) > 1,
piece && pieceHash(piece),
modifiers && modifiersHash(modifiers),
customSvg && customSvgHash(customSvg),
]
.filter(x => x)
.join(',');
}
function pieceHash(piece) {
return [piece.color, piece.role, piece.scale].filter(x => x).join(',');
}
function modifiersHash(m) {
return '' + (m.lineWidth || '');
}
function customSvgHash(s) {
let h = 0;
for (let i = 0; i < s.length; i++) {
h = (((h << 5) - h) + s.charCodeAt(i)) >>> 0;
}
return 'custom-' + h.toString();
}
function renderShape(state, { shape, current, hash }, brushes, arrowDests, bounds) {
let el;
if (shape.customSvg) {
const orig = orient(util_1.key2pos(shape.orig), state.orientation);
el = renderCustomSvg(shape.customSvg, orig, bounds);
}
else if (shape.piece)
el = renderPiece(state.drawable.pieces.baseUrl, orient(util_1.key2pos(shape.orig), state.orientation), shape.piece, bounds);
else {
const orig = orient(util_1.key2pos(shape.orig), state.orientation);
if (shape.dest) {
let brush = brushes[shape.brush];
if (shape.modifiers)
brush = makeCustomBrush(brush, shape.modifiers);
el = renderArrow(brush, orig, orient(util_1.key2pos(shape.dest), state.orientation), current, (arrowDests.get(shape.dest) || 0) > 1, bounds);
}
else
el = renderCircle(brushes[shape.brush], orig, current, bounds);
}
el.setAttribute('cgHash', hash);
return el;
}
function renderCustomSvg(customSvg, pos, bounds) {
const { width, height } = bounds;
const w = width / 8;
const h = height / 8;
const x = pos[0] * w;
const y = (7 - pos[1]) * h;
const g = setAttributes(createElement('g'), { transform: `translate(${x},${y})` });
const svg = setAttributes(createElement('svg'), { width: w, height: h, viewBox: '0 0 100 100' });
g.appendChild(svg);
svg.innerHTML = customSvg;
return g;
}
function renderCircle(brush, pos, current, bounds) {
const o = pos2px(pos, bounds), widths = circleWidth(bounds), radius = (bounds.width + bounds.height) / 32;
return setAttributes(createElement('circle'), {
stroke: brush.color,
'stroke-width': widths[current ? 0 : 1],
fill: 'none',
opacity: opacity(brush, current),
cx: o[0],
cy: o[1],
r: radius - widths[1] / 2,
});
}
function renderArrow(brush, orig, dest, current, shorten, bounds) {
const m = arrowMargin(bounds, shorten && !current), a = pos2px(orig, bounds), b = pos2px(dest, bounds), dx = b[0] - a[0], dy = b[1] - a[1], angle = Math.atan2(dy, dx), xo = Math.cos(angle) * m, yo = Math.sin(angle) * m;
return setAttributes(createElement('line'), {
stroke: brush.color,
'stroke-width': lineWidth(brush, current, bounds),
'stroke-linecap': 'round',
'marker-end': 'url(#arrowhead-' + brush.key + ')',
opacity: opacity(brush, current),
x1: a[0],
y1: a[1],
x2: b[0] - xo,
y2: b[1] - yo,
});
}
function renderPiece(baseUrl, pos, piece, bounds) {
const o = pos2px(pos, bounds), size = (bounds.width / 8) * (piece.scale || 1), name = piece.color[0] + (piece.role === 'knight' ? 'n' : piece.role[0]).toUpperCase();
return setAttributes(createElement('image'), {
className: `${piece.role} ${piece.color}`,
x: o[0] - size / 2,
y: o[1] - size / 2,
width: size,
height: size,
href: baseUrl + name + '.svg',
});
}
function renderMarker(brush) {
const marker = setAttributes(createElement('marker'), {
id: 'arrowhead-' + brush.key,
orient: 'auto',
markerWidth: 4,
markerHeight: 8,
refX: 2.05,
refY: 2.01,
});
marker.appendChild(setAttributes(createElement('path'), {
d: 'M0,0 V4 L3,2 Z',
fill: brush.color,
}));
marker.setAttribute('cgKey', brush.key);
return marker;
}
function setAttributes(el, attrs) {
for (const key in attrs)
el.setAttribute(key, attrs[key]);
return el;
}
exports.setAttributes = setAttributes;
function orient(pos, color) {
return color === 'white' ? pos : [7 - pos[0], 7 - pos[1]];
}
function makeCustomBrush(base, modifiers) {
return {
color: base.color,
opacity: Math.round(base.opacity * 10) / 10,
lineWidth: Math.round(modifiers.lineWidth || base.lineWidth),
key: [base.key, modifiers.lineWidth].filter(x => x).join(''),
};
}
function circleWidth(bounds) {
const base = bounds.width / 512;
return [3 * base, 4 * base];
}
function lineWidth(brush, current, bounds) {
return (((brush.lineWidth || 10) * (current ? 0.85 : 1)) / 512) * bounds.width;
}
function opacity(brush, current) {
return (brush.opacity || 1) * (current ? 0.9 : 1);
}
function arrowMargin(bounds, shorten) {
return ((shorten ? 20 : 10) / 512) * bounds.width;
}
function pos2px(pos, bounds) {
return [((pos[0] + 0.5) * bounds.width) / 8, ((7.5 - pos[1]) * bounds.height) / 8];
}
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{ State } from './state';\nimport { key2pos } from './util';\nimport { Drawable, DrawShape, DrawShapePiece, DrawBrush, DrawBrushes, DrawModifiers } from './draw';\nimport * as cg from './types';\n\nexport function createElement(tagName: string): SVGElement {\n  return document.createElementNS('http://www.w3.org/2000/svg', tagName);\n}\n\ninterface Shape {\n  shape: DrawShape;\n  current: boolean;\n  hash: Hash;\n}\n\ntype CustomBrushes = Map<string, DrawBrush>; // by hash\n\ntype ArrowDests = Map<cg.Key, number>; // how many arrows land on a square\n\ntype Hash = string;\n\nexport function renderSvg(state: State, svg: SVGElement, customSvg: SVGElement): void {\n  const d = state.drawable,\n    curD = d.current,\n    cur = curD && curD.mouseSq ? (curD as DrawShape) : undefined,\n    arrowDests: ArrowDests = new Map(),\n    bounds = state.dom.bounds();\n\n  for (const s of d.shapes.concat(d.autoShapes).concat(cur ? [cur] : [])) {\n    if (s.dest) arrowDests.set(s.dest, (arrowDests.get(s.dest) || 0) + 1);\n  }\n\n  const shapes: Shape[] = d.shapes.concat(d.autoShapes).map((s: DrawShape) => {\n    return {\n      shape: s,\n      current: false,\n      hash: shapeHash(s, arrowDests, false, bounds),\n    };\n  });\n  if (cur)\n    shapes.push({\n      shape: cur,\n      current: true,\n      hash: shapeHash(cur, arrowDests, true, bounds),\n    });\n\n  const fullHash = shapes.map(sc => sc.hash).join(';');\n  if (fullHash === state.drawable.prevSvgHash) return;\n  state.drawable.prevSvgHash = fullHash;\n\n  /*\n    -- DOM hierarchy --\n    <svg class=\"cg-shapes\">      (<= svg)\n      <defs>\n        ...(for brushes)...\n      </defs>\n      <g>\n        ...(for arrows, circles, and pieces)...\n      </g>\n    </svg>\n    <svg class=\"cg-custom-svgs\"> (<= customSvg)\n      <g>\n        ...(for custom svgs)...\n      </g>\n    </svg>\n  */\n\n  const defsEl = svg.querySelector('defs') as SVGElement;\n  const shapesEl = svg.querySelector('g') as SVGElement;\n  const customSvgsEl = customSvg.querySelector('g') as SVGElement;\n\n  syncDefs(d, shapes, defsEl);\n  syncShapes(state, shapes.filter(s => !s.shape.customSvg), d.brushes, arrowDests, shapesEl);\n  syncShapes(state, shapes.filter(s =>  s.shape.customSvg), d.brushes, arrowDests, customSvgsEl);\n}\n\n// append only. Don't try to update/remove.\nfunction syncDefs(d: Drawable, shapes: Shape[], defsEl: SVGElement) {\n  const brushes: CustomBrushes = new Map();\n  let brush: DrawBrush;\n  for (const s of shapes) {\n    if (s.shape.dest) {\n      brush = d.brushes[s.shape.brush!];\n      if (s.shape.modifiers) brush = makeCustomBrush(brush, s.shape.modifiers);\n      brushes.set(brush.key, brush);\n    }\n  }\n  const keysInDom = new Set();\n  let el: SVGElement | undefined = defsEl.firstChild as SVGElement;\n  while (el) {\n    keysInDom.add(el.getAttribute('cgKey'));\n    el = el.nextSibling as SVGElement | undefined;\n  }\n  for (const [key, brush] of brushes.entries()) {\n    if (!keysInDom.has(key)) defsEl.appendChild(renderMarker(brush));\n  }\n}\n\n// append and remove only. No updates.\nfunction syncShapes(\n  state: State,\n  shapes: Shape[],\n  brushes: DrawBrushes,\n  arrowDests: ArrowDests,\n  root: SVGElement,\n): void {\n  const bounds = state.dom.bounds(),\n    hashesInDom = new Map(), // by hash\n    toRemove: SVGElement[] = [];\n  for (const sc of shapes) hashesInDom.set(sc.hash, false);\n  let el: SVGElement | undefined = root.firstChild as SVGElement,\n    elHash: Hash;\n  while (el) {\n    elHash = el.getAttribute('cgHash') as Hash;\n    // found a shape element that's here to stay\n    if (hashesInDom.has(elHash)) hashesInDom.set(elHash, true);\n    // or remove it\n    else toRemove.push(el);\n    el = el.nextSibling as SVGElement | undefined;\n  }\n  // remove old shapes\n  for (const el of toRemove) root.removeChild(el);\n  // insert shapes that are not yet in dom\n  for (const sc of shapes) {\n    if (!hashesInDom.get(sc.hash)) root.appendChild(renderShape(state, sc, brushes, arrowDests, bounds));\n  }\n}\n\nfunction shapeHash(\n  { orig, dest, brush, piece, modifiers, customSvg }: DrawShape,\n  arrowDests: ArrowDests,\n  current: boolean,\n  bounds: ClientRect\n): Hash {\n  return [\n    bounds.width,\n    bounds.height,\n    current,\n    orig,\n    dest,\n    brush,\n    dest && (arrowDests.get(dest) || 0) > 1,\n    piece && pieceHash(piece),\n    modifiers && modifiersHash(modifiers),\n    customSvg && customSvgHash(customSvg),\n  ]\n    .filter(x => x)\n    .join(',');\n}\n\nfunction pieceHash(piece: DrawShapePiece): Hash {\n  return [piece.color, piece.role, piece.scale].filter(x => x).join(',');\n}\n\nfunction modifiersHash(m: DrawModifiers): Hash {\n  return '' + (m.lineWidth || '');\n}\n\nfunction customSvgHash(s: string): Hash {\n  // Rolling hash with base 31 (cf. https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript)\n  let h = 0;\n  for (let i = 0; i < s.length; i++) {\n    h = (((h << 5) - h) + s.charCodeAt(i)) >>> 0;\n  }\n  return 'custom-' + h.toString();\n}\n\nfunction renderShape(\n  state: State,\n  { shape, current, hash }: Shape,\n  brushes: DrawBrushes,\n  arrowDests: ArrowDests,\n  bounds: ClientRect\n): SVGElement {\n  let el: SVGElement;\n  if (shape.customSvg) {\n    const orig = orient(key2pos(shape.orig), state.orientation)\n    el = renderCustomSvg(shape.customSvg, orig, bounds);\n  }\n  else if (shape.piece)\n    el = renderPiece(\n      state.drawable.pieces.baseUrl,\n      orient(key2pos(shape.orig), state.orientation),\n      shape.piece,\n      bounds\n    );\n  else {\n    const orig = orient(key2pos(shape.orig), state.orientation);\n    if (shape.dest) {\n      let brush: DrawBrush = brushes[shape.brush!];\n      if (shape.modifiers) brush = makeCustomBrush(brush, shape.modifiers);\n      el = renderArrow(\n        brush,\n        orig,\n        orient(key2pos(shape.dest), state.orientation),\n        current,\n        (arrowDests.get(shape.dest) || 0) > 1,\n        bounds\n      );\n    } else el = renderCircle(brushes[shape.brush!], orig, current, bounds);\n  }\n  el.setAttribute('cgHash', hash);\n  return el;\n}\n\nfunction renderCustomSvg(customSvg: string, pos: cg.Pos, bounds: ClientRect): SVGElement {\n  const { width, height } = bounds;\n  const w = width / 8;\n  const h = height / 8;\n  const x = pos[0] * w;\n  const y = (7 - pos[1]) * h;\n\n  // Translate to top-left of `orig` square\n  const g = setAttributes(createElement('g'), { transform: `translate(${x},${y})` });\n\n  // Give 100x100 coordinate system to the user for `orig` square\n  const svg = setAttributes(createElement('svg'), { width: w, height: h, viewBox: '0 0 100 100' });\n\n  g.appendChild(svg);\n  svg.innerHTML = customSvg;\n  return g;\n}\n\nfunction renderCircle(brush: DrawBrush, pos: cg.Pos, current: boolean, bounds: ClientRect): SVGElement {\n  const o = pos2px(pos, bounds),\n    widths = circleWidth(bounds),\n    radius = (bounds.width + bounds.height) / 32;\n  return setAttributes(createElement('circle'), {\n    stroke: brush.color,\n    'stroke-width': widths[current ? 0 : 1],\n    fill: 'none',\n    opacity: opacity(brush, current),\n    cx: o[0],\n    cy: o[1],\n    r: radius - widths[1] / 2,\n  });\n}\n\nfunction renderArrow(\n  brush: DrawBrush,\n  orig: cg.Pos,\n  dest: cg.Pos,\n  current: boolean,\n  shorten: boolean,\n  bounds: ClientRect\n): SVGElement {\n  const m = arrowMargin(bounds, shorten && !current),\n    a = pos2px(orig, bounds),\n    b = pos2px(dest, bounds),\n    dx = b[0] - a[0],\n    dy = b[1] - a[1],\n    angle = Math.atan2(dy, dx),\n    xo = Math.cos(angle) * m,\n    yo = Math.sin(angle) * m;\n  return setAttributes(createElement('line'), {\n    stroke: brush.color,\n    'stroke-width': lineWidth(brush, current, bounds),\n    'stroke-linecap': 'round',\n    'marker-end': 'url(#arrowhead-' + brush.key + ')',\n    opacity: opacity(brush, current),\n    x1: a[0],\n    y1: a[1],\n    x2: b[0] - xo,\n    y2: b[1] - yo,\n  });\n}\n\nfunction renderPiece(baseUrl: string, pos: cg.Pos, piece: DrawShapePiece, bounds: ClientRect): SVGElement {\n  const o = pos2px(pos, bounds),\n    size = (bounds.width / 8) * (piece.scale || 1),\n    name = piece.color[0] + (piece.role === 'knight' ? 'n' : piece.role[0]).toUpperCase();\n  return setAttributes(createElement('image'), {\n    className: `${piece.role} ${piece.color}`,\n    x: o[0] - size / 2,\n    y: o[1] - size / 2,\n    width: size,\n    height: size,\n    href: baseUrl + name + '.svg',\n  });\n}\n\nfunction renderMarker(brush: DrawBrush): SVGElement {\n  const marker = setAttributes(createElement('marker'), {\n    id: 'arrowhead-' + brush.key,\n    orient: 'auto',\n    markerWidth: 4,\n    markerHeight: 8,\n    refX: 2.05,\n    refY: 2.01,\n  });\n  marker.appendChild(\n    setAttributes(createElement('path'), {\n      d: 'M0,0 V4 L3,2 Z',\n      fill: brush.color,\n    })\n  );\n  marker.setAttribute('cgKey', brush.key);\n  return marker;\n}\n\nexport function setAttributes(el: SVGElement, attrs: { [key: string]: any }): SVGElement {\n  for (const key in attrs) el.setAttribute(key, attrs[key]);\n  return el;\n}\n\nfunction orient(pos: cg.Pos, color: cg.Color): cg.Pos {\n  return color === 'white' ? pos : [7 - pos[0], 7 - pos[1]];\n}\n\nfunction makeCustomBrush(base: DrawBrush, modifiers: DrawModifiers): DrawBrush {\n  return {\n    color: base.color,\n    opacity: Math.round(base.opacity * 10) / 10,\n    lineWidth: Math.round(modifiers.lineWidth || base.lineWidth),\n    key: [base.key, modifiers.lineWidth].filter(x => x).join(''),\n  };\n}\n\nfunction circleWidth(bounds: ClientRect): [number, number] {\n  const base = bounds.width / 512;\n  return [3 * base, 4 * base];\n}\n\nfunction lineWidth(brush: DrawBrush, current: boolean, bounds: ClientRect): number {\n  return (((brush.lineWidth || 10) * (current ? 0.85 : 1)) / 512) * bounds.width;\n}\n\nfunction opacity(brush: DrawBrush, current: boolean): number {\n  return (brush.opacity || 1) * (current ? 0.9 : 1);\n}\n\nfunction arrowMargin(bounds: ClientRect, shorten: boolean): number {\n  return ((shorten ? 20 : 10) / 512) * bounds.width;\n}\n\nfunction pos2px(pos: cg.Pos, bounds: ClientRect): cg.NumberPair {\n  return [((pos[0] + 0.5) * bounds.width) / 8, ((7.5 - pos[1]) * bounds.height) / 8];\n}\n"]}