public TextGrid getSubGrid(int x, int y, int width, int height) {
TextGrid grid = new TextGrid(width, height);
for (int i = 0; i < height; i++) {
grid.setRow(i, new StringBuilder(getRow(y + i).subSequence(x, x + width)));
}
return grid;
}
public CellSet followCell(Cell cell, Cell blocked) {
if (isIntersection(cell)) return followIntersection(cell, blocked);
if (isCorner(cell)) return followCorner(cell, blocked);
if (isLine(cell)) return followLine(cell, blocked);
if (isStub(cell)) return followStub(cell, blocked);
if (isCrossOnLine(cell)) return followCrossOnLine(cell, blocked);
System.err.println("Umbiguous input at position " + cell + ":");
TextGrid subGrid = getTestingSubGrid(cell);
subGrid.printDebug();
throw new RuntimeException("Cannot follow cell " + cell + ": cannot determine cell type");
}
public boolean equals(TextGrid grid) {
if (grid.getHeight() != this.getHeight() || grid.getWidth() != this.getWidth()) {
return false;
}
int height = grid.getHeight();
for (int i = 0; i < height; i++) {
String row1 = this.getRow(i).toString();
String row2 = grid.getRow(i).toString();
if (!row1.equals(row2)) return false;
}
return true;
}
public void copyCellsTo(CellSet cells, TextGrid grid) {
for (Cell cell : cells) {
grid.set(cell, this.get(cell));
}
}
public boolean matchesAny(Cell cell, GridPatternGroup criteria) {
TextGrid subGrid = getTestingSubGrid(cell);
return subGrid.matchesAny(criteria);
}
public TextGrid(TextGrid otherGrid) {
rows = new ArrayList<StringBuilder>();
for (StringBuilder row : otherGrid.getRows()) {
rows.add(new StringBuilder(row));
}
}
public static TextGrid makeSameSizeAs(TextGrid grid) {
return new TextGrid(grid.getWidth(), grid.getHeight());
}