+ let arrowCanvas =
+ document.createElementNS("http://www.w3.org/2000/svg", "svg");
+ arrowCanvas.id = "arrowCanvas";
+ arrowCanvas.setAttribute("stroke", "none");
+ let defs =
+ document.createElementNS("http://www.w3.org/2000/svg", "defs");
+ const arrowWidth = squareWidth / 4;
+ let marker =
+ document.createElementNS("http://www.w3.org/2000/svg", "marker");
+ marker.id = "arrow";
+ marker.setAttribute("markerWidth", (2 * arrowWidth) + "px");
+ marker.setAttribute("markerHeight", (3 * arrowWidth) + "px");
+ marker.setAttribute("markerUnits", "userSpaceOnUse");
+ marker.setAttribute("refX", "0");
+ marker.setAttribute("refY", (1.5 * arrowWidth) + "px");
+ marker.setAttribute("orient", "auto");
+ let head =
+ document.createElementNS("http://www.w3.org/2000/svg", "path");
+ head.classList.add("arrow-head");
+ head.setAttribute(
+ "d",
+ "M0,0 L0," + (3 * arrowWidth) + " L" +
+ (2 * arrowWidth) + "," + (1.5 * arrowWidth) + " z"
+ );
+ marker.appendChild(head);
+ defs.appendChild(marker);
+ arrowCanvas.appendChild(defs);
+ svgArrows.concat(vLines).forEach(av => arrowCanvas.appendChild(av));
+ document.getElementById("rootBoardElement").appendChild(arrowCanvas);
+ },
+ mousedown: function(e) {
+ if (!this.mobileBrowser && e.which != 3)
+ // Cancel current drawing and circles, if any
+ this.cancelResetArrows();
+ if (this.mobileBrowser || e.which == 1) {
+ // Mouse left button
+ if (!this.start) {
+ this.containerPos =
+ document.getElementById("boardContainer").getBoundingClientRect();
+ // NOTE: classList[0] is enough: 'piece' is the first assigned class
+ const withPiece = (e.target.classList[0] == "piece");
+ if (withPiece) e.preventDefault();
+ // Show possible moves if current player allowed to play
+ const startSquare =
+ getSquareFromId(withPiece ? e.target.parentNode.id : e.target.id);
+ this.possibleMoves = [];
+ const color = this.analyze ? this.vr.turn : this.userColor;
+ if (this.vr.canIplay(color, startSquare)) {
+ // Emit the click event which could be used by some variants
+ const targetId =
+ (withPiece ? e.target.parentNode.id : e.target.id);
+ const sq = getSquareFromId(targetId);
+ this.$emit("click-square", sq);
+ if (withPiece && !this.vr.onlyClick(sq)) {
+ this.possibleMoves = this.vr.getPossibleMovesFrom(startSquare);
+ if (this.possibleMoves.length > 0) {
+ // For potential drag'n drop, remember start coordinates
+ // (to center the piece on mouse cursor)
+ let parent = e.target.parentNode; //surrounding square
+ const rect = parent.getBoundingClientRect();
+ this.start = {
+ x: rect.x + rect.width / 2,
+ y: rect.y + rect.width / 2,
+ id: parent.id
+ };
+ // Add the moving piece to the board, just after current image
+ this.selectedPiece = e.target.cloneNode();
+ Object.assign(
+ this.selectedPiece.style,
+ {
+ position: "absolute",
+ top: 0,
+ display: "inline-block",
+ zIndex: 3000
+ }
+ );
+ parent.insertBefore(this.selectedPiece, e.target.nextSibling);
+ }
+ }
+ }
+ }
+ else this.processMoveAttempt(e);
+ }
+ else if (e.which == 3) {
+ // Mouse right button
+ e.preventDefault();
+ this.containerPos =
+ document.getElementById("gamePosition").getBoundingClientRect();
+ let elem = e.target;
+ // Next loop because of potential marks
+ while (elem.tagName == "IMG") elem = elem.parentNode;
+ this.startArrow = getSquareFromId(elem.id);
+ }
+ else e.preventDefault();