X-Git-Url: https://git.auder.net/?p=vchess.git;a=blobdiff_plain;f=public%2Fjavascripts%2Futils%2FprintDiagram.js;h=9f7a0203d1a9af62d4d988a88e3d0ce336ddc288;hp=ef750490ed02ad88c3af54663ac3de12606e78b1;hb=b6487fb9c41705187cf97215fc9e8f86a59057c7;hpb=da06a6eb0237123ce43fdb01cb06246b8b57f5e5

diff --git a/public/javascripts/utils/printDiagram.js b/public/javascripts/utils/printDiagram.js
index ef750490..9f7a0203 100644
--- a/public/javascripts/utils/printDiagram.js
+++ b/public/javascripts/utils/printDiagram.js
@@ -1,42 +1,104 @@
-// Assuming V(ariantRules) class is loaded.
-// args: object with position (mandatory), orientation, marks (optional)
-function getDiagram(args)
+// Turn (human) marks into coordinates
+function getMarkArray(marks)
 {
-	const [sizeX,sizeY] = [V.size.x,V.size.y];
-	// Obtain array of pieces images names
-	const board = VariantRules.GetBoard(args.position);
-	const orientation = args.orientation || "w";
-	let markArray = [];
-	if (!!args.marks)
+	if (!marks || marks == "-")
+		return [];
+	let markArray = doubleArray(V.size.x, V.size.y, false);
+	const squares = marks.split(",");
+	for (let i=0; i<squares.length; i++)
 	{
-		// Turn (human) marks into coordinates
-		markArray = doubleArray(sizeX, sizeY, false);
-		let squares = args.marks.split(",");
-		for (let i=0; i<squares.length; i++)
+		const coords = V.SquareToCoords(squares[i]);
+		markArray[coords.x][coords.y] = true;
+	}
+	return markArray;
+}
+
+// Turn (human) shadow indications into coordinates
+function getShadowArray(shadow)
+{
+	if (!shadow || shadow == "-")
+		return [];
+	let shadowArray = doubleArray(V.size.x, V.size.y, false);
+	const squares = shadow.split(",");
+	for (let i=0; i<squares.length; i++)
+	{
+		const rownum = V.size.x - parseInt(squares[i]);
+		if (!isNaN(rownum))
+		{
+			// Shadow a full row
+			for (let i=0; i<V.size.y; i++)
+				shadowArray[rownum][i] = true;
+			continue;
+		}
+		if (squares[i].length == 1)
 		{
-			const res = /^([a-z]+)([0-9]+)$/i.exec(squares[i]);
-			const x = sizeX - parseInt(res[2]); //white at bottom, so counting is reversed
-			const y = res[1].charCodeAt(0)-97; //always one char: max 26, big enough
-			markArray[x][y] = true;
+			// Shadow a full column
+			const colnum = V.ColumnToCoord(squares[i]);
+			for (let i=0; i<V.size.x; i++)
+				shadowArray[i][colnum] = true;
+			continue;
 		}
+		if (squares[i].indexOf("-") >= 0)
+		{
+			// Shadow a range of squares, horizontally or vertically
+			const firstLastSq = squares[i].split("-");
+			const range =
+			[
+				V.SquareToCoords(firstLastSq[0]),
+				V.SquareToCoords(firstLastSq[1])
+			];
+			const step =
+			[
+				range[1].x == range[0].x
+					? 0
+					: (range[1].x - range[0].x) / Math.abs(range[1].x - range[0].x),
+				range[1].y == range[0].y
+					? 0
+					: (range[1].y - range[0].y) / Math.abs(range[1].y - range[0].y)
+			];
+			// Convention: range always from smaller to larger number
+			for (let x=range[0].x, y=range[0].y; x <= range[1].x && y <= range[1].y;
+				x += step[0], y += step[1])
+			{
+				shadowArray[x][y] = true;
+			}
+			continue;
+		}
+		// Shadow just one square:
+		const coords = V.SquareToCoords(squares[i]);
+		shadowArray[coords.x][coords.y] = true;
 	}
+	return shadowArray;
+}
+
+// args: object with position (mandatory), and
+// orientation, marks, shadow (optional)
+function getDiagram(args)
+{
+	// Obtain the array of pieces images names:
+	const board = VariantRules.GetBoard(args.position);
+	const orientation = args.orientation || "w";
+	const markArray = getMarkArray(args.marks);
+	const shadowArray = getShadowArray(args.shadow);
 	let boardDiv = "";
 	const [startX,startY,inc] = orientation == 'w'
 		? [0, 0, 1]
-		: [sizeX-1, sizeY-1, -1];
-	for (let i=startX; i>=0 && i<sizeX; i+=inc)
+		: [V.size.x-1, V.size.y-1, -1];
+	for (let i=startX; i>=0 && i<V.size.x; i+=inc)
 	{
 		boardDiv += "<div class='row'>";
-		for (let j=startY; j>=0 && j<sizeY; j+=inc)
+		for (let j=startY; j>=0 && j<V.size.y; j+=inc)
 		{
-			boardDiv += "<div class='board board" + sizeY + " " +
-				((i+j)%2==0 ? "light-square-diag" : "dark-square-diag") + "'>";
+			boardDiv += "<div class='board board" + V.size.y + " " +
+				((i+j)%2==0 ? "light-square-diag" : "dark-square-diag") +
+				(shadowArray.length > 0 && shadowArray[i][j] ? " in-shadow" : "") +
+				"'>";
 			if (board[i][j] != V.EMPTY)
 			{
 				boardDiv += "<img src='/images/pieces/" +
 					V.getPpath(board[i][j]) + ".svg' class='piece'/>";
 			}
-			if (!!args.marks && markArray[i][j])
+			if (markArray.length > 0 && markArray[i][j])
 				boardDiv += "<img src='/images/mark.svg' class='mark-square'/>";
 			boardDiv += "</div>";
 		}