Replace image editor.

src/org/thoughtcrime/securesms/imageeditor/EditSession.java

@@ -0,0 +1,30 @@
+package org.thoughtcrime.securesms.imageeditor;
+
+import android.graphics.Matrix;
+import android.graphics.PointF;
+
+import org.thoughtcrime.securesms.imageeditor.model.EditorElement;
+
+/**
+ * Represents an underway edit of the image.
+ * <p>
+ * Accepts new touch positions, new touch points, released touch points and when complete can commit the edit.
+ * <p>
+ * Examples of edit session implementations are, Drag, Draw, Resize:
+ * <p>
+ * {@link ElementDragEditSession} for dragging with a single finger.
+ * {@link ElementScaleEditSession} for resize/dragging with two fingers.
+ * {@link DrawingSession} for drawing with a single finger.
+ */
+interface EditSession {
+
+  void movePoint(int p, PointF point);
+
+  EditorElement getSelected();
+
+  EditSession newPoint(Matrix newInverse, PointF point, int p);
+
+  EditSession removePoint(Matrix newInverse, int p);
+
+  void commit();
+}