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kakuro.html
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<html>
<head>
<style>
body {
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
width: 100%;
height: 100%;
margin: 0;
overflow: hidden;
}
#canvas {
background: gray;
color: white;
border: 1px solid black;
}
#user_input {
width: 100px;
height: 100px;
position: absolute;
display: none;
text-align: center;
caret-color: transparent;
font-family: "David";
font-size: 20px;
color: blue;
}
#user_input::-webkit-inner-spin-button {
-webkit-appearance: none;
margin: 0;
}
#options {
flex-direction: column;
display: flex;
padding: 10px;
align-items: center;
}
#options .inputs {
display: flex;
padding: 10px;
}
#options button {
width: 300px;
height: 25px;
}
#options .inputs .field {
padding: 10px;
display: flex;
justify-content: center;
flex-direction: row;
}
#options .inputs .field input {
width: 50px;
height: 25px;
}
#options .inputs .field span {
padding: 0px 10px 0px 0px;
display: inline-flex;
align-items: center;
}
</style>
</head>
<body>
<div id="options">
<div class="inputs">
<div class="field">
<span>Rows:</span><input type="number" id="rows" value="16" />
</div>
<div class="field">
<span>Columns:</span><input type="number" id="columns" value="16"/>
</div>
<div class="field">
<span>Max Length:</span><input type="number" id="max-length" value="9"/>
</div>
</div>
<button id="start">Start New Game</button>
</div>
<canvas id="canvas" width="600" height="600"></canvas>
<input type="number" id="user_input"></input>
<script>
const TILES_GAP = 1;
const BLOCK_TILE = 0;
const EMPTY = -1;
const ROW_ORIENTATION = 1;
const COLUMN_ORIENTATION = 2;
const REAL_VALUE = 1;
const USER_INPUT = 2;
const SHORTEN_LINE_MAX_RETRIES = 100;
const GENERATE_BOARD_MAX_RETRIES = 1000;
const canvas = document.getElementById("canvas");
const canvas2d = canvas.getContext("2d");
const input = document.getElementById("user_input");
let frameWidth = canvas.width;
let frameHeight = canvas.height;
let tiles;
let rows;
let columns;
let maxLength;
let maxBlockSize = 2;
function randomInt(max) {
return Math.floor(Math.random() * max);
}
function isOutside(position) {
return position.x < 0 || position.x >= columns || position.y < 0 || position.y >= rows;
}
function isBlock(position) {
return tiles[position.y][position.x].value == BLOCK_TILE;
}
function isOutsideOrBlock(position) {
return isOutside(position) || isBlock(position);
}
function isEmpty(position) {
return tiles[position.y][position.x].value == EMPTY;
}
function setBlock(position) {
tiles[position.y][position.x].value = BLOCK_TILE;
}
function setEmpty(position) {
tiles[position.y][position.x].value = EMPTY;
}
function getValue(position) {
return tiles[position.y][position.x].value;
}
function setValue(position, candidate) {
tiles[position.y][position.x].value = candidate
}
function isEmptyUserInput(position) {
return tiles[position.y][position.x].userInput == EMPTY;
}
function getUserInput(position) {
return tiles[position.y][position.x].userInput;
}
function setUserInput(position, value) {
tiles[position.y][position.x].userInput = value;
}
function setEmptyUserInput(position) {
tiles[position.y][position.x].userInput = EMPTY;
}
function getValueSafe(position, invalidValue) {
if (isOutside(position)) {
return invalidValue;
}
return getValue(position);
}
function newPosition(x, y) {
return {
x: x,
y: y
};
}
function changePosition(position, offsetX, offsetY) {
return newPosition(position.x + offsetX, position.y + offsetY);
}
function changePositionOrientally(position, orientation, offset) {
if (orientation == ROW_ORIENTATION) {
return newPosition(position.x + offset, position.y);
} else {
return newPosition(position.x, position.y + offset);
}
}
function initializeEmptyTile() {
return {
value: EMPTY,
userInput: EMPTY
};
}
function initializeEmptyRow() {
let row = []
for (let x = 0; x < columns; x++) {
row.push(initializeEmptyTile());
}
return row;
}
function initializeEmptyGrid() {
let result = []
for (let y = 0; y < rows; y++) {
result.push(initializeEmptyRow());
}
return result;
}
function initializeBorders() {
for (let y = 0; y < rows; y++) {
setBlock(newPosition(0, y));
}
for (let x = 0; x < columns; x++) {
setBlock(newPosition(x, 0));
}
}
function initializeRandomBlocks() {
for (let y = 0; y < rows; y++) {
for (let x = Math.floor(randomInt(maxLength)); x < columns; x += Math.floor(randomInt(maxLength))) {
tryInitializeBlock(newPosition(x, y), randomInt(maxBlockSize) + 1);
}
}
}
function tryInitializeBlock(position, blockSize) {
for (let offsetY = 0; offsetY < blockSize; offsetY++) {
for (let offsetX = 0; offsetX < blockSize; offsetX++) {
let blockCandidate = changePosition(position, offsetX, offsetY);
if (!isBlockViolateConstraints(blockCandidate)) {
setBlock(blockCandidate);
}
}
}
}
function isBlockViolateConstraints(position) {
if (isOutsideOrBlock(position)) {
return true;
}
if (isViolateSingleCellConstraint(position)) {
return true;
}
return isViolateMultiAreaConstraint(position);
}
function isViolateSingleCellConstraint(position) {
return (
((getValueSafe(changePosition(position, -1, 0), BLOCK_TILE) != BLOCK_TILE) &&
(getValueSafe(changePosition(position, -2, 0), BLOCK_TILE) == BLOCK_TILE)) ||
((getValueSafe(changePosition(position, 1, 0), BLOCK_TILE) != BLOCK_TILE) &&
(getValueSafe(changePosition(position, 2, 0), BLOCK_TILE) == BLOCK_TILE)) ||
((getValueSafe(changePosition(position, 0, -1), BLOCK_TILE) != BLOCK_TILE) &&
(getValueSafe(changePosition(position, 0, -2), BLOCK_TILE) == BLOCK_TILE)) ||
((getValueSafe(changePosition(position, 0, 1), BLOCK_TILE) != BLOCK_TILE) &&
(getValueSafe(changePosition(position, 0, 2), BLOCK_TILE) == BLOCK_TILE))
);
}
function isViolateMultiAreaConstraint(position) {
setBlock(position);
let areasCount = calculateNumberOfAreas();
setEmpty(position);
return areasCount > 1;
}
function calculateNumberOfAreas() {
let areas = initializeEmptyGrid();
let areasCount = 0;
for (let y = 0; y < rows; y++) {
for (let x = 0; x < columns; x++) {
if (markArea(newPosition(x, y), areas, areasCount + 1)) {
areasCount = areasCount + 1;
}
}
}
return areasCount;
}
function markArea(position, areas, areaNumber) {
if (isOutsideOrBlock(position)) {
return false;
}
if (areas[position.y][position.x].value != EMPTY) {
return false;
}
areas[position.y][position.x].value = areaNumber;
markArea(changePosition(position, 1, 0), areas, areaNumber);
markArea(changePosition(position, -1, 0), areas, areaNumber);
markArea(changePosition(position, 0, 1), areas, areaNumber);
markArea(changePosition(position, 0, -1), areas, areaNumber);
return true;
}
function shortenLongLines() {
for (let y = 0; y < rows; y++) {
for (let x = 0; x < columns; x++) {
position = newPosition(x, y)
if (isBlock(position)) {
continue;
}
if (!checkAndShortLine(position, ROW_ORIENTATION) ||
!checkAndShortLine(position, COLUMN_ORIENTATION))
{
return false;
}
}
}
return true;
}
function checkAndShortLine(position, orientation) {
if (calculateLineLength(position, orientation) > maxLength) {
return shortenLine(position, orientation);
}
return true;
}
function calculateLineLength(position, orientation) {
let length = 0;
while (true) {
if (isOutsideOrBlock(position)) {
return length;
}
length = length + 1;
position = changePositionOrientally(position, orientation, 1);
}
return length;
}
function shortenLine(position, orientation) {
let length = calculateLineLength(position, orientation);
for (let i = 0; i < SHORTEN_LINE_MAX_RETRIES; i++) {
let blockCandidate = changePositionOrientally(position, orientation, randomInt(length));
tryInitializeBlock(blockCandidate, 1);
length = calculateLineLength(position, orientation);
if (length <= maxLength) {
return true;
}
}
return false;
}
function initializeNumbers() {
for (let y = 0; y < rows; y++) {
for (let x = 0; x < columns; x++) {
if (!fillNumbersRecursively(newPosition(x, y))) {
return false;
}
}
}
return true;
}
function fillNumbersRecursively(position) {
if (isOutside(position)) {
return true;
}
if (!isEmpty(position)) {
return true;
}
let seed = randomInt(maxLength) + 1;
for (let i = 0; i < maxLength; i++) {
let numberCandidate = ((seed + i) % maxLength) + 1;
if (isNumberExistInLine(position, numberCandidate, ROW_ORIENTATION) ||
isNumberExistInLine(position, numberCandidate, COLUMN_ORIENTATION))
{
continue;
}
setValue(position, numberCandidate);
if (fillNumbersRecursively(changePositionOrientally(position, ROW_ORIENTATION, 1)) &&
fillNumbersRecursively(changePositionOrientally(position, COLUMN_ORIENTATION, 1))) {
return true;
}
setEmpty(position);
}
return false;
}
function getFirstTileInLine(position, orientation) {
while (!isBlock(position)) {
position = changePositionOrientally(position, orientation, -1);
}
return changePositionOrientally(position, orientation, 1);
}
function isNumberExistInLine(position, number, orientation) {
position = getFirstTileInLine(position, orientation);
while (true) {
if (isOutsideOrBlock(position)) {
return false;
}
if (getValue(position) == number) {
return true;
}
position = changePositionOrientally(position, orientation, 1);
}
}
function tryInitializeOnce() {
tiles = initializeEmptyGrid();
initializeBorders();
initializeRandomBlocks();
return shortenLongLines() && initializeNumbers()
}
function tryInitialize(failCallback, successCallback) {
let timerId = setInterval(function() {
let success = tryInitializeOnce();
if (!success && failCallback()) {
return;
}
clearTimeout(timerId);
if (success) {
successCallback();
}
}, 1);
}
function initialize() {
canvas.height = rows * 40;
canvas.width = columns * 40;
input.height = rows * 40;
input.width = columns * 40;
frameWidth = canvas.width;
frameHeight = canvas.height;
let successCallback = function() {
console.log("success")
draw();
}
let failCounter = 0;
let failCallback = function() {
console.log("fail")
return failCounter++ < GENERATE_BOARD_MAX_RETRIES
}
tryInitialize(failCallback, successCallback);
}
function getLineSum(position, orientation, valueType) {
let result = 0;
while (true) {
if (isOutsideOrBlock(position)) {
return result;
}
if (valueType == USER_INPUT) {
result = result + getUserInput(position);
} else {
result = result + getValue(position);
}
position = changePositionOrientally(position, orientation, 1);
}
}
function hasDuplicateNumbers(position, orientation) {
let seenNumbers = new Set()
while (true) {
if (isOutsideOrBlock(position)) {
return false;
}
if (seenNumbers.has(getUserInput(position))) {
return true;
}
seenNumbers.add(getUserInput(position));
position = changePositionOrientally(position, orientation, 1);
}
}
function check() {
for (let y = 0; y < rows; y++) {
for (let x = 0; x < columns; x++) {
position = newPosition(x, y);
if (isEmpty(position)) {
return false;
}
if (!isBlock(position)) {
continue;
}
let rowPosition = changePosition(position, 1, 0)
let columnPosition = changePosition(position, 0, 1)
if (hasDuplicateNumbers(rowPosition, ROW_ORIENTATION) ||
hasDuplicateNumbers(columnPosition, COLUMN_ORIENTATION)) {
return false;
}
let realRowSum = getLineSum(rowPosition, ROW_ORIENTATION, REAL_VALUE);
let userRowSum = getLineSum(rowPosition, ROW_ORIENTATION, USER_INPUT);
if (realRowSum != userRowSum) {
return false;
}
let realColumnSum = getLineSum(columnPosition, COLUMN_ORIENTATION, REAL_VALUE);
let userColumnSum = getLineSum(columnPosition, COLUMN_ORIENTATION, USER_INPUT);
if (realColumnSum != userColumnSum) {
return false;
}
}
}
return true;
}
function tileWidth() {
return (frameWidth - (TILES_GAP * (columns + 1))) / columns;
}
function tileHeight() {
return (frameHeight - (TILES_GAP * (rows + 1))) / rows;
}
function tileLeft(x) {
return (x * tileWidth()) + ((x + 1) * TILES_GAP);
}
function tileTop(y) {
return (y * tileHeight()) + ((y + 1) * TILES_GAP);
}
function drawTile(position) {
if (isBlock(position)) {
canvas2d.fillStyle = "black";
canvas2d.fillRect(tileLeft(position.x), tileTop(position.y), tileWidth(), tileHeight());
let rowSum = getLineSum(changePositionOrientally(position, ROW_ORIENTATION, 1), ROW_ORIENTATION, REAL_VALUE);
let colSum = getLineSum(changePositionOrientally(position, COLUMN_ORIENTATION, 1), COLUMN_ORIENTATION, REAL_VALUE);
if (rowSum == 0 && colSum == 0) {
return;
}
canvas2d.strokeStyle = "gray";
canvas2d.beginPath();
canvas2d.moveTo(tileLeft(position.x), tileTop(position.y));
canvas2d.lineTo(tileLeft(position.x) + tileWidth(), tileTop(position.y) + tileHeight());
canvas2d.stroke();
if (rowSum != 0) {
canvas2d.font = "15px David";
canvas2d.fillStyle = "white";
canvas2d.textAlign = "center";
canvas2d.textBaseline = "middle";
canvas2d.fillText(rowSum, tileLeft(position.x) + (tileWidth() / 2) + (tileWidth() / 4), tileTop(position.y) + (tileHeight() / 4));
}
if (colSum != 0) {
canvas2d.font = "15px David";
canvas2d.fillStyle = "white";
canvas2d.textAlign = "center";
canvas2d.textBaseline = "middle";
canvas2d.fillText(colSum, tileLeft(position.x) + (tileWidth() / 4), tileTop(position.y) + (tileWidth() / 2) + (tileHeight() / 4));
}
return;
}
if (isEmpty(position)) {
canvas2d.fillStyle = "#AAA";
canvas2d.fillRect(tileLeft(position.x), tileTop(position.y), tileWidth(), tileHeight());
return;
}
canvas2d.fillStyle = "white";
canvas2d.fillRect(tileLeft(position.x), tileTop(position.y), tileWidth(), tileHeight());
if (!isEmptyUserInput(position)) {
canvas2d.font = "20px David";
canvas2d.fillStyle = "blue";
canvas2d.textAlign = "center";
canvas2d.textBaseline = "middle";
canvas2d.fillText(getUserInput(position), tileLeft(position.x) + (tileWidth() / 2), tileTop(position.y) + (tileHeight() / 2));
}
else
{
// if (!isEmpty(position)) {
// canvas2d.font = "20px David";
// canvas2d.fillStyle = "#bbbbbb";
// canvas2d.textAlign = "center";
// canvas2d.textBaseline = "middle";
// canvas2d.fillText(getValue(position), tileLeft(position.x) + (tileWidth() / 2), tileTop(position.y) + (tileHeight() / 2));
// }
}
}
function draw() {
canvas2d.clearRect(0, 0, frameWidth, frameHeight);
for (let y = 0; y < rows; y++) {
for (let x = 0; x < columns; x++) {
drawTile(newPosition(x, y));
}
}
}
function hideUserInput() {
input.attributes["position"] = {}
input.style.display = "none"
}
function showUserInput(canvasRect, position) {
input.style.left = (canvasRect.left + tileLeft(position.x)) + "px";
input.style.top = (canvasRect.top + tileTop(position.y)) + "px";
input.style.width = tileWidth() + TILES_GAP * 2 + "px"
input.style.height = tileHeight() + TILES_GAP * 2 + "px"
if (isEmptyUserInput(position)) {
input.value = "";
} else {
input.value = getUserInput(position);
}
input.style.display = "initial"
input.attributes["position"] = position
input.focus();
input.select();
}
function handleClick(event) {
let rect = event.target.getBoundingClientRect();
let mouseX = event.clientX - rect.left;
let mouseY = event.clientY - rect.top;
let tileX = Math.floor(mouseX / (frameWidth / columns));
let tileY = Math.floor(mouseY / (frameHeight / rows));
let position = newPosition(tileX, tileY);
if (isBlock(position)) {
hideUserInput();
return;
}
showUserInput(rect, position);
}
function handleInputChange(event) {
let position = input.attributes.position
let userInput = parseInt(input.value);
if (!isNaN(userInput)) {
if (userInput < 1 || userInput > 9) {
alert("Invalid number: " + userInput);
return;
}
setUserInput(position, userInput);
} else {
setEmptyUserInput(position);
}
draw();
if (check()) {
alert("win");
initialize();
}
}
function startNewGame() {
rows = document.getElementById("rows").valueAsNumber
columns = document.getElementById("columns").valueAsNumber
maxLength = document.getElementById("max-length").valueAsNumber
if (rows < 2 || rows > 100 || columns < 2 || columns > 100 || maxLength > 9 || maxLength < 4) {
alert("Invalid number of rows, columns or max length");
return;
}
initialize();
canvas.onclick = function(event) {
event.stopPropagation();
handleClick(event);
};
input.onblur = function(event) {
hideUserInput();
}
input.onchange = function(event) {
handleInputChange(event);
}
}
function main() {
startNewGame();
document.getElementById("start").onclick = function(event) {
startNewGame();
};
}
main();
</script>
</body>
</html>