[code=php]
function HTMLActuator() {
this.tileContainer = document.querySelector(".tile-container");
this.scoreContainer = document.querySelector(".score-container");
this.bestContainer = document.querySelector(".best-container");
this.messageContainer = document.querySelector(".game-message");
this.score = 0;
}
HTMLActuator.prototype.actuate = function (grid, metadata) {
var self = this;
window.requestAnimationFrame(function () {
self.clearContainer(self.tileContainer);
grid.cells.forEach(function (column) {
column.forEach(function (cell) {
if (cell) {
self.addTile(cell);
}
});
});
self.updateScore(metadata.score);
self.updateBestScore(metadata.bestScore);
if (metadata.terminated) {
if (metadata.over) {
self.message(false); // You lose
} else if (metadata.won) {
self.message(true); // You win!
}
}
});
};
// Continues the game (both restart and keep playing)
HTMLActuator.prototype.continueGame = function () {
this.clearMessage();
};
HTMLActuator.prototype.clearContainer = function (container) {
while (container.firstChild) {
container.removeChild(container.firstChild);
}
};
HTMLActuator.prototype.addTile = function (tile) {
var self = this;
var wrapper = document.createElement("div");
var inner = document.createElement("div");
var position = tile.previousPosition || { x: tile.x, y: tile.y };
var positionClass = this.positionClass(position);
// We can't use classlist because it somehow glitches when replacing classes
var classes = ["tile", "tile-" + tile.value, positionClass];
if (tile.value > 2048) classes.push("tile-super");
this.applyClasses(wrapper, classes);
inner.classList.add("tile-inner");
inner.textContent = tile.value;
if (tile.previousPosition) {
// Make sure that the tile gets rendered in the previous position first
window.requestAnimationFrame(function () {
classes[2] = self.positionClass({ x: tile.x, y: tile.y });
self.applyClasses(wrapper, classes); // Update the position
});
} else if (tile.mergedFrom) {
classes.push("tile-merged");
this.applyClasses(wrapper, classes);
// Render the tiles that merged
tile.mergedFrom.forEach(function (merged) {
self.addTile(merged);
});
} else {
classes.push("tile-new");
this.applyClasses(wrapper, classes);
}
// Add the inner part of the tile to the wrapper
wrapper.appendChild(inner);
// Put the tile on the board
this.tileContainer.appendChild(wrapper);
};
HTMLActuator.prototype.applyClasses = function (element, classes) {
element
.setAttribute
("class", classes
.join(" "));};
HTMLActuator.prototype.normalizePosition = function (position) {
return { x: position.x + 1, y: position.y + 1 };
};
HTMLActuator.prototype.positionClass = function (position) {
position = this.normalizePosition(position);
return "tile-position-" + position.x + "-" + position.y;
};
HTMLActuator.prototype.updateScore = function (score) {
this.clearContainer(this.scoreContainer);
var difference = score - this.score;
this.score = score;
this.scoreContainer.textContent = this.score;
if (difference > 0) {
var addition = document.createElement("div");
addition.classList.add("score-addition");
addition.textContent = "+" + difference;
this.scoreContainer.appendChild(addition);
}
};
HTMLActuator.prototype.updateBestScore = function (bestScore) {
this.bestContainer.textContent = bestScore;
};
HTMLActuator.prototype.message = function (won) {
var type = won ? "game-won" : "game-over";
var message = won ? "You win!" : "Game over!";
this.messageContainer.classList.add(type);
this.messageContainer.getElementsByTagName("p")[0].textContent = message;
};
HTMLActuator.prototype.clearMessage = function () {
// IE only takes one value to remove at a time.
this.messageContainer.classList.remove("game-won");
this.messageContainer.classList.remove("game-over");
};
[/code]