Added Line Iterator.

app/src/main/java/fr/iutfbleau/sae/LineIterator.java

@@ -0,0 +1,79 @@
+package fr.iutfbleau.sae;
+
+import android.graphics.Point;
+
+import java.util.Iterator;
+
+/**
+ * {@code LineIterator} is an iterator that iterates over the {@code Cell}s of a
+ * {@code Line}.
+ * 
+ * @autor Alexeï Kadir, Lyanis Souidi, Hugo Dimitrijevic
+ * @version 1.0
+ */
+public class LineIterator implements Iterator<Cell> {
+    /**
+     * The {@code Line} to iterate over.
+     */
+    private final Line line;
+
+    /**
+     * The difference between the x-coordinates of the start and end {@code Cell}s
+     * of the {@code Line}.
+     */
+    private final int dx;
+
+    /**
+     * The difference between the y-coordinates of the start and end {@code Cell}s
+     * of the {@code Line}.
+     */
+    private final int dy;
+
+    /**
+     * The index of the next {@code Cell} to return.
+     */
+    private int index;
+
+    /**
+     * Constructs a new {@code LineIterator} that iterates over the specified
+     * {@code Line}.
+     * 
+     * @param line The {@code Line} to iterate over.
+     */
+    public LineIterator(Line line) {
+        this.line = line;
+
+        this.dx = this.line.getEnd().x - this.line.getStart().x;
+        this.dy = this.line.getEnd().y - this.line.getStart().y;
+
+        this.index = 0;
+    }
+
+    /**
+     * Checks if there is a next {@code Cell} to return.
+     * 
+     * @return {@code true} if there is a next {@code Cell} to return, {@code false}
+     *         otherwise.
+     */
+    @Override
+    public boolean hasNext() {
+        return this.index < 5;
+    }
+
+    /**
+     * Returns the next {@code Cell} of the {@code Line}.
+     * 
+     * @return The next {@code Cell} of the {@code Line}.
+     */
+    @Override
+    public Cell next() {
+        Cell cell = this.line.getStart();
+
+        cell.x += Integer.signum(this.dx) * this.index;
+        cell.y += Integer.signum(this.dy) * this.index;
+
+        this.index++;
+
+        return cell;
+    }
+}