chessground-haichess
Version:
lichess.org Chess UI
196 lines • 27.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.cancel = exports.end = exports.move = exports.dragNewPiece = exports.start = void 0;
const board = require("./board");
const util = require("./util");
const draw_1 = require("./draw");
const anim_1 = require("./anim");
function start(s, e) {
if (!e.isTrusted || (e.button !== undefined && e.button !== 0))
return;
if (e.touches && e.touches.length > 1)
return;
const bounds = s.dom.bounds(), position = util.eventPosition(e), orig = board.getKeyAtDomPos(position, board.whitePov(s), bounds);
if (!orig)
return;
const piece = s.pieces.get(orig);
const previouslySelected = s.selected;
if (!previouslySelected && s.drawable.enabled && (s.drawable.eraseOnClick || !piece || piece.color !== s.turnColor))
draw_1.clear(s);
if (e.cancelable !== false &&
(!e.touches || !s.movable.color || piece || previouslySelected || pieceCloseTo(s, position)))
e.preventDefault();
const hadPremove = !!s.premovable.current;
const hadPredrop = !!s.predroppable.current;
s.stats.ctrlKey = e.ctrlKey;
if (s.selected && board.canMove(s, s.selected, orig)) {
anim_1.anim(state => board.selectSquare(state, orig), s);
}
else {
board.selectSquare(s, orig);
}
const stillSelected = s.selected === orig;
const element = pieceElementByKey(s, orig);
if (piece && element && stillSelected && board.isDraggable(s, orig)) {
s.draggable.current = {
orig,
piece,
origPos: position,
pos: position,
started: s.draggable.autoDistance && s.stats.dragged,
element,
previouslySelected,
originTarget: e.target,
};
element.cgDragging = true;
element.classList.add('dragging');
const ghost = s.dom.elements.ghost;
if (ghost) {
ghost.className = `ghost ${piece.color} ${piece.role}`;
util.translateAbs(ghost, util.posToTranslateAbs(bounds)(util.key2pos(orig), board.whitePov(s)));
util.setVisible(ghost, true);
}
processDrag(s);
}
else {
if (hadPremove)
board.unsetPremove(s);
if (hadPredrop)
board.unsetPredrop(s);
}
s.dom.redraw();
}
exports.start = start;
function pieceCloseTo(s, pos) {
const asWhite = board.whitePov(s), bounds = s.dom.bounds(), radiusSq = Math.pow(bounds.width / 8, 2);
for (const key in s.pieces) {
const center = util.computeSquareCenter(key, asWhite, bounds);
if (util.distanceSq(center, pos) <= radiusSq)
return true;
}
return false;
}
function dragNewPiece(s, piece, e, force) {
const key = 'a0';
s.pieces.set(key, piece);
s.dom.redraw();
const position = util.eventPosition(e);
s.draggable.current = {
orig: key,
piece,
origPos: position,
pos: position,
started: true,
element: () => pieceElementByKey(s, key),
originTarget: e.target,
newPiece: true,
force: !!force,
};
processDrag(s);
}
exports.dragNewPiece = dragNewPiece;
function processDrag(s) {
requestAnimationFrame(() => {
var _a;
const cur = s.draggable.current;
if (!cur)
return;
if ((_a = s.animation.current) === null || _a === void 0 ? void 0 : _a.plan.anims.has(cur.orig))
s.animation.current = undefined;
const origPiece = s.pieces.get(cur.orig);
if (!origPiece || !util.samePiece(origPiece, cur.piece))
cancel(s);
else {
if (!cur.started && util.distanceSq(cur.pos, cur.origPos) >= Math.pow(s.draggable.distance, 2))
cur.started = true;
if (cur.started) {
if (typeof cur.element === 'function') {
const found = cur.element();
if (!found)
return;
found.cgDragging = true;
found.classList.add('dragging');
cur.element = found;
}
const bounds = s.dom.bounds();
util.translateAbs(cur.element, [
cur.pos[0] - bounds.left - bounds.width / 16,
cur.pos[1] - bounds.top - bounds.height / 16,
]);
}
}
processDrag(s);
});
}
function move(s, e) {
if (s.draggable.current && (!e.touches || e.touches.length < 2)) {
s.draggable.current.pos = util.eventPosition(e);
}
}
exports.move = move;
function end(s, e) {
const cur = s.draggable.current;
if (!cur)
return;
if (e.type === 'touchend' && e.cancelable !== false)
e.preventDefault();
if (e.type === 'touchend' && cur.originTarget !== e.target && !cur.newPiece) {
s.draggable.current = undefined;
return;
}
board.unsetPremove(s);
board.unsetPredrop(s);
const eventPos = util.eventPosition(e) || cur.pos;
const dest = board.getKeyAtDomPos(eventPos, board.whitePov(s), s.dom.bounds());
if (dest && cur.started && cur.orig !== dest) {
if (cur.newPiece)
board.dropNewPiece(s, cur.orig, dest, cur.force);
else {
s.stats.ctrlKey = e.ctrlKey;
if (board.userMove(s, cur.orig, dest))
s.stats.dragged = true;
}
}
else if (cur.newPiece) {
s.pieces.delete(cur.orig);
}
else if (s.draggable.deleteOnDropOff && !dest) {
s.pieces.delete(cur.orig);
board.callUserFunction(s.events.change);
}
if (cur.orig === cur.previouslySelected && (cur.orig === dest || !dest))
board.unselect(s);
else if (!s.selectable.enabled)
board.unselect(s);
removeDragElements(s);
s.draggable.current = undefined;
s.dom.redraw();
}
exports.end = end;
function cancel(s) {
const cur = s.draggable.current;
if (cur) {
if (cur.newPiece)
s.pieces.delete(cur.orig);
s.draggable.current = undefined;
board.unselect(s);
removeDragElements(s);
s.dom.redraw();
}
}
exports.cancel = cancel;
function removeDragElements(s) {
const e = s.dom.elements;
if (e.ghost)
util.setVisible(e.ghost, false);
}
function pieceElementByKey(s, key) {
let el = s.dom.elements.board.firstChild;
while (el) {
if (el.cgKey === key && el.tagName === 'PIECE')
return el;
el = el.nextSibling;
}
return;
}
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{ State } from './state';\nimport * as board from './board';\nimport * as util from './util';\nimport { clear as drawClear } from './draw';\nimport * as cg from './types';\nimport { anim } from './anim';\n\nexport interface DragCurrent {\n  orig: cg.Key; // orig key of dragging piece\n  piece: cg.Piece;\n  origPos: cg.NumberPair; // first event position\n  pos: cg.NumberPair; // latest event position\n  started: boolean; // whether the drag has started; as per the distance setting\n  element: cg.PieceNode | (() => cg.PieceNode | undefined);\n  newPiece?: boolean; // it it a new piece from outside the board\n  force?: boolean; // can the new piece replace an existing one (editor)\n  previouslySelected?: cg.Key;\n  originTarget: EventTarget | null;\n}\n\nexport function start(s: State, e: cg.MouchEvent): void {\n  if (!e.isTrusted || (e.button !== undefined && e.button !== 0)) return; // only touch or left click\n  if (e.touches && e.touches.length > 1) return; // support one finger touch only\n  const bounds = s.dom.bounds(),\n    position = util.eventPosition(e)!,\n    orig = board.getKeyAtDomPos(position, board.whitePov(s), bounds);\n  if (!orig) return;\n  const piece = s.pieces.get(orig);\n  const previouslySelected = s.selected;\n  if (!previouslySelected && s.drawable.enabled && (s.drawable.eraseOnClick || !piece || piece.color !== s.turnColor))\n    drawClear(s);\n  // Prevent touch scroll and create no corresponding mouse event, if there\n  // is an intent to interact with the board. If no color is movable\n  // (and the board is not for viewing only), touches are likely intended to\n  // select squares.\n  if (\n    e.cancelable !== false &&\n    (!e.touches || !s.movable.color || piece || previouslySelected || pieceCloseTo(s, position))\n  )\n    e.preventDefault();\n  const hadPremove = !!s.premovable.current;\n  const hadPredrop = !!s.predroppable.current;\n  s.stats.ctrlKey = e.ctrlKey;\n  if (s.selected && board.canMove(s, s.selected, orig)) {\n    anim(state => board.selectSquare(state, orig), s);\n  } else {\n    board.selectSquare(s, orig);\n  }\n  const stillSelected = s.selected === orig;\n  const element = pieceElementByKey(s, orig);\n  if (piece && element && stillSelected && board.isDraggable(s, orig)) {\n    s.draggable.current = {\n      orig,\n      piece,\n      origPos: position,\n      pos: position,\n      started: s.draggable.autoDistance && s.stats.dragged,\n      element,\n      previouslySelected,\n      originTarget: e.target,\n    };\n    element.cgDragging = true;\n    element.classList.add('dragging');\n    // place ghost\n    const ghost = s.dom.elements.ghost;\n    if (ghost) {\n      ghost.className = `ghost ${piece.color} ${piece.role}`;\n      util.translateAbs(ghost, util.posToTranslateAbs(bounds)(util.key2pos(orig), board.whitePov(s)));\n      util.setVisible(ghost, true);\n    }\n    processDrag(s);\n  } else {\n    if (hadPremove) board.unsetPremove(s);\n    if (hadPredrop) board.unsetPredrop(s);\n  }\n  s.dom.redraw();\n}\n\nfunction pieceCloseTo(s: State, pos: cg.NumberPair): boolean {\n  const asWhite = board.whitePov(s),\n    bounds = s.dom.bounds(),\n    radiusSq = Math.pow(bounds.width / 8, 2);\n  for (const key in s.pieces) {\n    const center = util.computeSquareCenter(key as cg.Key, asWhite, bounds);\n    if (util.distanceSq(center, pos) <= radiusSq) return true;\n  }\n  return false;\n}\n\nexport function dragNewPiece(s: State, piece: cg.Piece, e: cg.MouchEvent, force?: boolean): void {\n  const key: cg.Key = 'a0';\n  s.pieces.set(key, piece);\n  s.dom.redraw();\n\n  const position = util.eventPosition(e)!;\n\n  s.draggable.current = {\n    orig: key,\n    piece,\n    origPos: position,\n    pos: position,\n    started: true,\n    element: () => pieceElementByKey(s, key),\n    originTarget: e.target,\n    newPiece: true,\n    force: !!force,\n  };\n  processDrag(s);\n}\n\nfunction processDrag(s: State): void {\n  requestAnimationFrame(() => {\n    const cur = s.draggable.current;\n    if (!cur) return;\n    // cancel animations while dragging\n    if (s.animation.current?.plan.anims.has(cur.orig)) s.animation.current = undefined;\n    // if moving piece is gone, cancel\n    const origPiece = s.pieces.get(cur.orig);\n    if (!origPiece || !util.samePiece(origPiece, cur.piece)) cancel(s);\n    else {\n      if (!cur.started && util.distanceSq(cur.pos, cur.origPos) >= Math.pow(s.draggable.distance, 2))\n        cur.started = true;\n      if (cur.started) {\n        // support lazy elements\n        if (typeof cur.element === 'function') {\n          const found = cur.element();\n          if (!found) return;\n          found.cgDragging = true;\n          found.classList.add('dragging');\n          cur.element = found;\n        }\n\n        const bounds = s.dom.bounds();\n        util.translateAbs(cur.element, [\n          cur.pos[0] - bounds.left - bounds.width / 16,\n          cur.pos[1] - bounds.top - bounds.height / 16,\n        ]);\n      }\n    }\n    processDrag(s);\n  });\n}\n\nexport function move(s: State, e: cg.MouchEvent): void {\n  // support one finger touch only\n  if (s.draggable.current && (!e.touches || e.touches.length < 2)) {\n    s.draggable.current.pos = util.eventPosition(e)!;\n  }\n}\n\nexport function end(s: State, e: cg.MouchEvent): void {\n  const cur = s.draggable.current;\n  if (!cur) return;\n  // create no corresponding mouse event\n  if (e.type === 'touchend' && e.cancelable !== false) e.preventDefault();\n  // comparing with the origin target is an easy way to test that the end event\n  // has the same touch origin\n  if (e.type === 'touchend' && cur.originTarget !== e.target && !cur.newPiece) {\n    s.draggable.current = undefined;\n    return;\n  }\n  board.unsetPremove(s);\n  board.unsetPredrop(s);\n  // touchend has no position; so use the last touchmove position instead\n  const eventPos = util.eventPosition(e) || cur.pos;\n  const dest = board.getKeyAtDomPos(eventPos, board.whitePov(s), s.dom.bounds());\n  if (dest && cur.started && cur.orig !== dest) {\n    if (cur.newPiece) board.dropNewPiece(s, cur.orig, dest, cur.force);\n    else {\n      s.stats.ctrlKey = e.ctrlKey;\n      if (board.userMove(s, cur.orig, dest)) s.stats.dragged = true;\n    }\n  } else if (cur.newPiece) {\n    s.pieces.delete(cur.orig);\n  } else if (s.draggable.deleteOnDropOff && !dest) {\n    s.pieces.delete(cur.orig);\n    board.callUserFunction(s.events.change);\n  }\n  if (cur.orig === cur.previouslySelected && (cur.orig === dest || !dest)) board.unselect(s);\n  else if (!s.selectable.enabled) board.unselect(s);\n\n  removeDragElements(s);\n\n  s.draggable.current = undefined;\n  s.dom.redraw();\n}\n\nexport function cancel(s: State): void {\n  const cur = s.draggable.current;\n  if (cur) {\n    if (cur.newPiece) s.pieces.delete(cur.orig);\n    s.draggable.current = undefined;\n    board.unselect(s);\n    removeDragElements(s);\n    s.dom.redraw();\n  }\n}\n\nfunction removeDragElements(s: State): void {\n  const e = s.dom.elements;\n  if (e.ghost) util.setVisible(e.ghost, false);\n}\n\nfunction pieceElementByKey(s: State, key: cg.Key): cg.PieceNode | undefined {\n  let el = s.dom.elements.board.firstChild;\n  while (el) {\n    if ((el as cg.KeyedNode).cgKey === key && (el as cg.KeyedNode).tagName === 'PIECE') return el as cg.PieceNode;\n    el = el.nextSibling;\n  }\n  return;\n}\n"]}