[WIP] Working on refactor for SwipeBackLayout.java class

app/src/main/java/me/ccrama/redditslide/SwipeLayout/BottomScrimStrategy.java

@@ -0,0 +1,7 @@
+public class BottomScrimStrategy implements ScrimStrategy{
+    public void drawScrim(Canvas canvas, int mTrackingEdge) {
+        if ((mTrackingEdge & EDGE_BOTTOM) != 0) {
+            canvas.clipRect(child.getLeft(), child.getBottom(), getRight(), getHeight());
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/BottomShadow.java

@@ -0,0 +1,8 @@
+public class BottomShadow extends Shadow {
+    @Override
+    public void setShadow(int edgeFlag, Drawable shadow) {
+        if ((edgeFlag & EDGE_BOTTOM) != 0) {
+            mShadowBottom = shadow;
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/BottomShadowDrawer.java

@@ -0,0 +1,10 @@
+public class BottomShadowDrawer implements ShadowStrategy {
+    public void drawShadow(Drawable mShadow, Rect rect, float scrimOpacity, Canvas canvas) {
+        if ((mEdgeFlag & EDGE_BOTTOM) != 0) {
+            mShadow.setBounds(childRect.left, childRect.bottom, childRect.right,
+                    childRect.bottom + mShadow.getIntrinsicHeight());
+            mShadow.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
+            mShadow.draw(canvas);
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/LeftScrimStrategy.java

@@ -0,0 +1,7 @@
+public class LeftScrimStrategy implements ScrimStrategy{
+    public void drawScrim(Canvas canvas, int mTrackingEdge) {
+        if ((mTrackingEdge & EDGE_LEFT) != 0) {
+            canvas.clipRect(0, 0, child.getLeft(), getHeight());
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/LeftShadow.java

@@ -0,0 +1,9 @@
+public class LeftShadow extends Shadowable {
+    @Override
+    public void setShadow(int edgeFlag, Drawable shadow) {
+        if ((edgeFlag & EDGE_LEFT) != 0) {
+            mShadowLeft = shadow;
+        }
+    }
+
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/LeftShadowDrawer.java

@@ -0,0 +1,10 @@
+public class LeftShadowDrawer implements ShadowStrategy{
+    public void drawShadow(Drawable mShadow, Rect rect, float scrimOpacity, Canvas canvas) {
+        if ((mEdgeFlag & EDGE_LEFT) != 0) {
+            mShadow.setBounds(childRect.left - mShadow.getIntrinsicWidth(), childRect.top,
+                    childRect.left, childRect.bottom);
+            mShadow.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
+            mShadow.draw(canvas);
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/RightScrimStrategy.java

@@ -0,0 +1,7 @@
+public class RightScrimStrategy implements ScrimStrategy{
+    public void drawScrim(Canvas canvas, int mTrackingEdge) {
+        if ((mTrackingEdge & EDGE_RIGHT) != 0) {
+            canvas.clipRect(child.getRight(), 0, getRight(), getHeight());
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/RightShadow.java

@@ -0,0 +1,8 @@
+public class RightShadow extends Shadowable {
+    @Override
+    public void setShadow(int edgeFlag, Drawable shadow) {
+        if ((edgeFlag & EDGE_RIGHT) != 0) {
+            mShadowRight = shadow;
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/RightShadowDrawer.java

@@ -0,0 +1,10 @@
+public class RightShadowDrawer implements ShadowStrategy{
+    public void drawShadow(Drawable mShadow, Rect rect, float scrimOpacity, Canvas canvas) {
+        if ((mEdgeFlag & EDGE_RIGHT) != 0) {
+            mShadow.setBounds(childRect.right, childRect.top,
+                    childRect.right + mShadow.getIntrinsicWidth(), childRect.bottom);
+            mShadow.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
+            mShadow.draw(canvas);
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/ScrimStrategy.java

@@ -0,0 +1,3 @@
+public interface ScrimStrategy {
+    public void drawScrim(Canvas canvas, int mTrackingEdge);
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/Shadow.java

@@ -0,0 +1,4 @@
+public abstract class Shadow {
+    public Shadow() {}
+    public abstract void setShadow(int edgeFlag, Drawable shadow);
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/ShadowStrategy.java

@@ -0,0 +1,3 @@
+public interface ShadowStrategy {
+    public void drawShadow(Drawable mShadow, Rect rect, float scrimOpacity, Canvas canvas);
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/SwipeBackLayout.java

@@ -301,15 +301,18 @@ public void setScrollThresHold(float threshold) {
      * @see #EDGE_TOP
      */
     public void setShadow(Drawable shadow, int edgeFlag) {
-        if ((edgeFlag & EDGE_LEFT) != 0) {
-            mShadowLeft = shadow;
-        } else if ((edgeFlag & EDGE_RIGHT) != 0) {
-            mShadowRight = shadow;
-        } else if ((edgeFlag & EDGE_BOTTOM) != 0) {
-            mShadowBottom = shadow;
-        } else if ((edgeFlag & EDGE_TOP) != 0) {
-            mShadowTop = shadow;
-        }
+        ShadowSetter shadowSetter = new ShadowSetter();
+
+        Shadow leftShadow = new LeftShadow();
+        Shadow rightShadow = new RightShadow();
+        Shadow topShadow = new TopShadow();
+        Shadow bottomShadow = new BottomShadow();
+
+        leftShadow.setShadow(edgeFlag, shadow);
+        rightShadow.setShadow(edgeFlag, shadow);
+        topShadow.setShadow(edgeFlag, shadow);
+        bottomShadow.setShadow(edgeFlag, shadow);
+
         invalidate();
     }
 
@@ -413,49 +416,34 @@ private void drawScrim(Canvas canvas, View child) {
         final int alpha = (int) (baseAlpha * mScrimOpacity);
         final int color = alpha << 24 | (mScrimColor & 0xffffff);
 
-        if ((mTrackingEdge & EDGE_LEFT) != 0) {
-            canvas.clipRect(0, 0, child.getLeft(), getHeight());
-        } else if ((mTrackingEdge & EDGE_RIGHT) != 0) {
-            canvas.clipRect(child.getRight(), 0, getRight(), getHeight());
-        } else if ((mTrackingEdge & EDGE_BOTTOM) != 0) {
-            canvas.clipRect(child.getLeft(), child.getBottom(), getRight(), getHeight());
-        } else if ((mTrackingEdge & EDGE_TOP) != 0) {
-            canvas.clipRect(child.getLeft(), 0, getRight(), child.getTop() + getStatusBarHeight());
-        }
+        ScrimStrategy top = new TopScrimStrategy();
+        ScrimStrategy right = new RightScrimStrategy();
+        ScrimStrategy bottom = new BottomScrimStrategy();
+        ScrimStrategy left = new LeftScrimStrategy();
+
+        top.drawScrim(canvas, child);
+        right.drawScrim(canvas, child);
+        bottom.drawScrim(canvas, child);
+        left.drawScrim(canvas, child);
+
         canvas.drawColor(color);
     }
 
     private void drawShadow(Canvas canvas, View child) {
         final Rect childRect = mTmpRect;
         child.getHitRect(childRect);
 
-        if ((mEdgeFlag & EDGE_LEFT) != 0) {
-            mShadowLeft.setBounds(childRect.left - mShadowLeft.getIntrinsicWidth(), childRect.top,
-                    childRect.left, childRect.bottom);
-            mShadowLeft.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
-            mShadowLeft.draw(canvas);
-        }
+        ShadowStrategy left = new LeftShadowDrawer();
+        left.drawShadow(mShadowLeft, childRect, mScrimOpacity, canvas);
 
-        if ((mEdgeFlag & EDGE_RIGHT) != 0) {
-            mShadowRight.setBounds(childRect.right, childRect.top,
-                    childRect.right + mShadowRight.getIntrinsicWidth(), childRect.bottom);
-            mShadowRight.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
-            mShadowRight.draw(canvas);
-        }
+        ShadowStrategy right = new RightShadowDrawer();
+        right.drawShadow(mShadowRight, childRect, mScrimOpacity, canvas);
 
-        if ((mEdgeFlag & EDGE_BOTTOM) != 0) {
-            mShadowBottom.setBounds(childRect.left, childRect.bottom, childRect.right,
-                    childRect.bottom + mShadowBottom.getIntrinsicHeight());
-            mShadowBottom.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
-            mShadowBottom.draw(canvas);
-        }
+        ShadowStrategy bottom = new BottomShadowDrawer();
+        right.drawShadow(mShadowBottom, childRect, mScrimOpacity, canvas);
 
-        if ((mEdgeFlag & EDGE_TOP) != 0) {
-            mShadowTop.setBounds(childRect.left, childRect.top - mShadowTop.getIntrinsicHeight(),
-                    childRect.right, childRect.top + getStatusBarHeight());
-            mShadowTop.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
-            mShadowTop.draw(canvas);
-        }
+        ShadowStrategy top = new TopShadowDrawer();
+        top.drawShadow(mShadowTop, childRect, mScrimOpacity, canvas);
     }
 
     /**

app/src/main/java/me/ccrama/redditslide/SwipeLayout/TopScrimStrategy.java

@@ -0,0 +1,7 @@
+public class TopScrimStrategy implements ScrimStrategy{
+    public void drawScrim(Canvas canvas, int mTrackingEdge) {
+        if ((mTrackingEdge & EDGE_TOP) != 0) {
+            canvas.clipRect(child.getLeft(), 0, getRight(), child.getTop() + getStatusBarHeight());
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/TopShadow.java

@@ -0,0 +1,8 @@
+public class TopShadow extends Shadowable {
+    @Override
+    public void setShadow(int edgeFlag, Drawable shadow) {
+        if ((edgeFlag & EDGE_TOP) != 0) {
+            mShadowTop = shadow;
+        }
+    }
+}

app/src/main/java/me/ccrama/redditslide/SwipeLayout/TopShadowDrawer.java

@@ -0,0 +1,10 @@
+public class TopShadowDrawer implements ShadowStrategy{
+    public void drawShadow(Drawable mShadow, Rect rect, float scrimOpacity, Canvas canvas) {
+        if ((mEdgeFlag & EDGE_TOP) != 0) {
+            mShadow.setBounds(childRect.left, childRect.top - mShadow.getIntrinsicHeight(),
+                    childRect.right, childRect.top + getStatusBarHeight());
+            mShadow.setAlpha((int) (mScrimOpacity * FULL_ALPHA));
+            mShadow.draw(canvas);
+        }
+    }
+}