// create move based on placed tiles
private Move createMove() {
if (game == null) return null;
if (placedTiles.size() < 1) return null;
Point[] points = new Point[placedTiles.size()];
placedTiles.keySet().toArray(points);
IBoard board = game.getBoard();
boolean horizontal = true;
boolean vertical = true;
// vertical?
for (int i = 1; i < points.length; i++) {
Point point = points[i];
if (point.x != points[i - 1].x) {
vertical = false;
break;
}
}
// horizontal?
for (int i = 1; i < points.length; i++) {
Point point = points[i];
if (point.y != points[i - 1].y) {
horizontal = false;
break;
}
}
// scattered and invalid?
if (!horizontal && !vertical) {
return null;
}
// ambiguous?
if (horizontal && vertical) {
int x = points[0].x;
int y = points[0].y;
if (board.getTile(y, x - 1).equals(Tile.NONE) && board.getTile(y, x + 1).equals(Tile.NONE)) {
horizontal = false;
}
if (board.getTile(y - 1, x).equals(Tile.NONE) && board.getTile(y + 1, x).equals(Tile.NONE)) {
vertical = false;
}
// not adjacent to anything?
if (!horizontal && !vertical) {
return null;
}
// still ambiguous?
if (horizontal && vertical) {
// just pick one
horizontal = false;
}
}
Orientation orientation = vertical ? Orientation.VERTICAL : Orientation.HORIZONTAL;
int dx = orientation.getDx();
int dy = orientation.getDy();
// find first placed tile
int x = points[0].x;
int y = points[0].y;
for (int i = 1; i < points.length; i++) {
Point point = points[i];
if (point.x < x) x = point.x;
if (point.y < y) y = point.y;
}
// traverse on-board tiles backwards
while (!board.getTile(y - dy, x - dx).equals(Tile.NONE)) {
x -= dx;
y -= dy;
}
int row = y;
int column = x;
// build word
StringBuffer b = new StringBuffer();
while (true) {
Point point = new Point(x, y);
Tile tile = board.getTile(y, x);
if (tile == null || tile.equals(Tile.NONE)) {
tile = placedTiles.get(point);
}
if (tile == null || tile.equals(Tile.NONE)) {
break;
}
b.append(tile);
x += dx;
y += dy;
}
Move move = new Move();
move.setColumn(column);
move.setRow(row);
move.setOrientation(orientation);
move.setWord(Convert.toTiles(b.toString()));
return move;
}
