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[2048.git] / js / html_actuator.js
Gabriele Cirulli
Gabriele Cirulli


Gabriele Cirulli

Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli
Gabriele Cirulli






Gabriele Cirulli
Gabriele Cirulli


Gabriele Cirulli

Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli



Gabriele Cirulli


Gabriele Cirulli



Gabriele Cirulli
Gabriele Cirulli
Gabriele Cirulli


Gabriele Cirulli
Gabriele Cirulli


Gabriele Cirulli
Gabriele Cirulli
Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli
Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli
Gabriele Cirulli



Gabriele Cirulli


Gabriele Cirulli
Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli






Gabriele Cirulli








Gabriele Cirulli
Gabriele Cirulli

Gabriele Cirulli







Gabriele Cirulli





Gabriele Cirulli

Gabriele Cirulli
Gabriele Cirulli








Gabriele Cirulli

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function HTMLActuator() {
  this.tileContainer    = document.getElementsByClassName("tile-container")[0];
  this.scoreContainer   = document.getElementsByClassName("score-container")[0];
  this.messageContainer = document.getElementsByClassName("game-message")[0];
 
  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);
 
    if (metadata.over) self.message(false); // You lose
    if (metadata.won) self.message(true); // You win!
  });
};
 
HTMLActuator.prototype.restart = function () {
  this.clearMessage();
};
 
HTMLActuator.prototype.clearContainer = function (container) {
  while (container.firstChild) {
    container.removeChild(container.firstChild);
  }
};
 
HTMLActuator.prototype.addTile = function (tile) {
  var self = this;
 
  var element   = document.createElement("div");
  var position  = tile.previousPosition || { x: tile.x, y: tile.y };
  positionClass = this.positionClass(position);
 
  // We can't use classlist because it somehow glitches when replacing classes
  var classes = ["tile", "tile-" + tile.value, positionClass];
  this.applyClasses(element, classes);
 
  element.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(element, classes); // Update the position
    });
  } else if (tile.mergedFrom) {
    classes.push("tile-merged");
    this.applyClasses(element, classes);
 
    // Render the tiles that merged
    tile.mergedFrom.forEach(function (merged) {
      self.addTile(merged);
    });
  } else {
    classes.push("tile-new");
    this.applyClasses(element, classes);
  }
 
  // Put the tile on the board
  this.tileContainer.appendChild(element);
};
 
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.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 () {
  this.messageContainer.classList.remove("game-won", "game-over");
};
 
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