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package com.android.launcher3.util;
import android.graphics.Rect;
import com.android.launcher3.model.data.ItemInfo;
/**
* Utility object to manage the occupancy in a grid.
*/
public class GridOccupancy extends AbsGridOccupancy {
private final int mCountX;
private final int mCountY;
public final boolean[][] cells;
public GridOccupancy(int countX, int countY) {
mCountX = countX;
mCountY = countY;
cells = new boolean[countX][countY];
}
/**
* Find the first vacant cell, if there is one.
*
* @param vacantOut Holds the x and y coordinate of the vacant cell
* @param spanX Horizontal cell span.
* @param spanY Vertical cell span.
*
* @return true if a vacant cell was found
*/
public boolean findVacantCell(int[] vacantOut, int spanX, int spanY) {
return super.findVacantCell(vacantOut, cells, mCountX, mCountY, spanX, spanY);
}
public void copyTo(GridOccupancy dest) {
for (int i = 0; i < mCountX; i++) {
for (int j = 0; j < mCountY; j++) {
dest.cells[i][j] = cells[i][j];
}
}
}
public boolean isRegionVacant(int x, int y, int spanX, int spanY) {
int x2 = x + spanX - 1;
int y2 = y + spanY - 1;
if (x < 0 || y < 0 || x2 >= mCountX || y2 >= mCountY) {
return false;
}
for (int i = x; i <= x2; i++) {
for (int j = y; j <= y2; j++) {
if (cells[i][j]) {
return false;
}
}
}
return true;
}
public void markCells(int cellX, int cellY, int spanX, int spanY, boolean value) {
if (cellX < 0 || cellY < 0) return;
for (int x = cellX; x < cellX + spanX && x < mCountX; x++) {
for (int y = cellY; y < cellY + spanY && y < mCountY; y++) {
cells[x][y] = value;
}
}
}
public void markCells(Rect r, boolean value) {
markCells(r.left, r.top, r.width(), r.height(), value);
}
public void markCells(CellAndSpan cell, boolean value) {
markCells(cell.cellX, cell.cellY, cell.spanX, cell.spanY, value);
}
public void markCells(ItemInfo item, boolean value) {
markCells(item.cellX, item.cellY, item.spanX, item.spanY, value);
}
public void clear() {
markCells(0, 0, mCountX, mCountY, false);
}
}
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