Support swipe action in CommentAndPostRecyclerViewAdapter and CommentsListingRecyclerViewAdapter.

6 files changed, 287 insertions, 19 deletions

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
index 9b34f58f..475d0001 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
@@ -1,10 +1,16 @@
 package ml.docilealligator.infinityforreddit.Activity;
 
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
 import android.util.DisplayMetrics;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -21,7 +27,9 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.content.res.ResourcesCompat;
 import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.LinearSmoothScroller;
 import androidx.recyclerview.widget.RecyclerView;
@@ -93,6 +101,7 @@ import ml.docilealligator.infinityforreddit.SortType;
 import ml.docilealligator.infinityforreddit.SortTypeSelectionCallback;
 import ml.docilealligator.infinityforreddit.Utils.APIUtils;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
+import ml.docilealligator.infinityforreddit.Utils.Utils;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -211,6 +220,12 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
     private SlidrInterface mSlidrInterface;
     private Drawable mSavedIcon;
     private Drawable mUnsavedIcon;
+    private ColorDrawable backgroundLeft;
+    private ColorDrawable backgroundRight;
+    private Drawable drawableLeft;
+    private Drawable drawableRight;
+    private float swipeActionThreshold = 0.3f;
+    private ItemTouchHelper touchHelper;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -279,6 +294,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
         mExpandChildren = !mSharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_TOP_LEVEL_COMMENTS_FIRST, false);
 
         mGlide = Glide.with(this);
+        Resources resources = getResources();
         mLocale = getResources().getConfiguration().locale;
 
         mLinearLayoutManager = new LinearLayoutManager(this);
@@ -362,6 +378,115 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
             });
         }
 
+        boolean enableSwipeAction = mSharedPreferences.getBoolean(SharedPreferencesUtils.ENABLE_SWIPE_ACTION, false);
+        boolean vibrateWhenActionTriggered = mSharedPreferences.getBoolean(SharedPreferencesUtils.VIBRATE_WHEN_ACTION_TRIGGERED, true);
+        Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
+        backgroundLeft = new ColorDrawable(mCustomThemeWrapper.getDownvoted());
+        backgroundRight = new ColorDrawable(mCustomThemeWrapper.getUpvoted());
+        drawableLeft = ResourcesCompat.getDrawable(resources, R.drawable.ic_arrow_downward_black_24dp, null);
+        drawableRight = ResourcesCompat.getDrawable(resources, R.drawable.ic_arrow_upward_black_24dp, null);
+        touchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
+            boolean exceedThreshold = false;
+
+            @Override
+            public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
+                if (!(viewHolder instanceof CommentAndPostRecyclerViewAdapter.PostDetailBaseViewHolder) &&
+                        !(viewHolder instanceof CommentAndPostRecyclerViewAdapter.CommentViewHolder)) {
+                    return makeMovementFlags(0, 0);
+                }
+                int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
+                return makeMovementFlags(0, swipeFlags);
+            }
+
+            @Override
+            public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
+                return false;
+            }
+
+            @Override
+            public boolean isItemViewSwipeEnabled() {
+                return true;
+            }
+
+            @Override
+            public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
+                if (touchHelper != null) {
+                    touchHelper.attachToRecyclerView(null);
+                    touchHelper.attachToRecyclerView(mRecyclerView);
+                    if (mAdapter != null) {
+                        mAdapter.onItemSwipe(viewHolder, direction);
+                    }
+                }
+            }
+
+            @Override
+            public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
+                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+
+                View itemView = viewHolder.itemView;
+                int horizontalOffset = (int) Utils.convertDpToPixel(16, ViewPostDetailActivity.this);
+                if (dX > 0) {
+                    if (dX > (itemView.getRight() - itemView.getLeft()) * swipeActionThreshold) {
+                        if (!exceedThreshold) {
+                            exceedThreshold = true;
+                            if (vibrateWhenActionTriggered && v != null) {
+                                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                    v.vibrate(VibrationEffect.createOneShot(10, 175));
+                                } else {
+                                    //deprecated in API 26
+                                    v.vibrate(10);
+                                }
+                            }
+                        }
+                        backgroundLeft.setBounds(0, itemView.getTop(), itemView.getRight(), itemView.getBottom());
+                    } else {
+                        exceedThreshold = false;
+                        backgroundLeft.setBounds(0, 0, 0, 0);
+                    }
+
+                    drawableLeft.setBounds(itemView.getLeft() + ((int) dX) - horizontalOffset - drawableLeft.getIntrinsicWidth(),
+                            (itemView.getBottom() + itemView.getTop() - drawableLeft.getIntrinsicHeight()) / 2,
+                            itemView.getLeft() + ((int) dX) - horizontalOffset,
+                            (itemView.getBottom() + itemView.getTop() + drawableLeft.getIntrinsicHeight()) / 2);
+                    backgroundLeft.draw(c);
+                    drawableLeft.draw(c);
+                } else if (dX < 0) {
+                    if (-dX > (itemView.getRight() - itemView.getLeft()) * swipeActionThreshold) {
+                        if (!exceedThreshold) {
+                            exceedThreshold = true;
+                            if (vibrateWhenActionTriggered && v != null) {
+                                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                    v.vibrate(VibrationEffect.createOneShot(10, 175));
+                                } else {
+                                    //deprecated in API 26
+                                    v.vibrate(10);
+                                }
+                            }
+                        }
+                        backgroundRight.setBounds(0, itemView.getTop(), itemView.getRight(), itemView.getBottom());
+                    } else {
+                        exceedThreshold = false;
+                        backgroundRight.setBounds(0, 0, 0, 0);
+                    }
+                    drawableRight.setBounds(itemView.getRight() + ((int) dX) + horizontalOffset,
+                            (itemView.getBottom() + itemView.getTop() - drawableRight.getIntrinsicHeight()) / 2,
+                            itemView.getRight() + ((int) dX) + horizontalOffset + drawableRight.getIntrinsicWidth(),
+                            (itemView.getBottom() + itemView.getTop() + drawableRight.getIntrinsicHeight()) / 2);
+                    backgroundRight.draw(c);
+                    drawableRight.draw(c);
+                }
+            }
+
+            @Override
+            public float getSwipeThreshold(@NonNull RecyclerView.ViewHolder viewHolder) {
+                return swipeActionThreshold;
+            }
+        });
+
+        if (enableSwipeAction) {
+            touchHelper.attachToRecyclerView(mRecyclerView);
+        }
+
         mSwipeRefreshLayout.setOnRefreshListener(() -> refresh(true, true));
 
         mSmoothScroller = new LinearSmoothScroller(this) {
@@ -383,7 +508,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
             mNewAccountName = getIntent().getStringExtra(EXTRA_NEW_ACCOUNT_NAME);
         }
 
-        orientation = getResources().getConfiguration().orientation;
+        orientation = resources.getConfiguration().orientation;
 
         if (!mNullAccessToken && mAccessToken == null) {
             getCurrentAccountAndBindView();
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
index 67447e0d..4874dd31 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
@@ -37,6 +37,7 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.constraintlayout.widget.ConstraintSet;
 import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
@@ -1783,6 +1784,22 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         mAutoplay = autoplay;
     }
 
+    public void onItemSwipe(RecyclerView.ViewHolder viewHolder, int direction) {
+        if (viewHolder instanceof PostDetailBaseViewHolder) {
+            if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
+                ((PostDetailBaseViewHolder) viewHolder).mUpvoteButton.performClick();
+            } else {
+                ((PostDetailBaseViewHolder) viewHolder).mDownvoteButton.performClick();
+            }
+        } else if (viewHolder instanceof CommentViewHolder) {
+            if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
+                ((CommentViewHolder) viewHolder).upvoteButton.performClick();
+            } else {
+                ((CommentViewHolder) viewHolder).downvoteButton.performClick();
+            }
+        }
+    }
+
     @Override
     public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
         if (holder instanceof CommentViewHolder) {
@@ -1879,7 +1896,7 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         void retryFetchingMoreComments();
     }
 
-    class PostDetailBaseViewHolder extends RecyclerView.ViewHolder {
+    public class PostDetailBaseViewHolder extends RecyclerView.ViewHolder {
         AspectRatioGifImageView mIconGifImageView;
         TextView mSubredditTextView;
         TextView mUserTextView;
@@ -3109,7 +3126,7 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
         }
     }
 
-    class CommentViewHolder extends RecyclerView.ViewHolder {
+    public class CommentViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.linear_layout_item_comment)
         LinearLayout linearLayout;
         @BindView(R.id.author_text_view_item_post_comment)
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentsListingRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentsListingRecyclerViewAdapter.java
index eb37f28a..ded4c662 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentsListingRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentsListingRecyclerViewAdapter.java
@@ -30,6 +30,7 @@ import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.constraintlayout.widget.ConstraintSet;
 import androidx.paging.PagedListAdapter;
 import androidx.recyclerview.widget.DiffUtil;
+import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.RecyclerView;
 
 import java.util.Locale;
@@ -528,11 +529,21 @@ public class CommentsListingRecyclerViewAdapter extends PagedListAdapter<Comment
         }
     }
 
+    public void onItemSwipe(RecyclerView.ViewHolder viewHolder, int direction) {
+        if (viewHolder instanceof CommentViewHolder) {
+            if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
+                ((CommentViewHolder) viewHolder).upvoteButton.performClick();
+            } else {
+                ((CommentViewHolder) viewHolder).downvoteButton.performClick();
+            }
+        }
+    }
+
     public interface RetryLoadingMoreCallback {
         void retryLoadingMore();
     }
 
-    class CommentViewHolder extends RecyclerView.ViewHolder {
+    public class CommentViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.linear_layout_item_comment)
         LinearLayout linearLayout;
         @BindView(R.id.vertical_block_item_post_comment)
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
index d9b3da20..74ac57cc 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/PostRecyclerViewAdapter.java
@@ -1298,22 +1298,16 @@ public class PostRecyclerViewAdapter extends PagedListAdapter<Post, RecyclerView
 
     public void onItemSwipe(RecyclerView.ViewHolder viewHolder, int direction) {
         if (viewHolder instanceof PostBaseViewHolder) {
-            Post post = getItem(viewHolder.getAdapterPosition());
-            if (post != null) {
-                if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
-                    ((PostBaseViewHolder) viewHolder).upvoteButton.performClick();
-                } else {
-                    ((PostBaseViewHolder) viewHolder).downvoteButton.performClick();
-                }
+            if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
+                ((PostBaseViewHolder) viewHolder).upvoteButton.performClick();
+            } else {
+                ((PostBaseViewHolder) viewHolder).downvoteButton.performClick();
             }
         } else if (viewHolder instanceof PostCompactBaseViewHolder) {
-            Post post = getItem(viewHolder.getAdapterPosition());
-            if (post != null) {
-                if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
-                    ((PostCompactBaseViewHolder) viewHolder).upvoteButton.performClick();
-                } else {
-                    ((PostCompactBaseViewHolder) viewHolder).downvoteButton.performClick();
-                }
+            if (direction == ItemTouchHelper.LEFT || direction == ItemTouchHelper.START) {
+                ((PostCompactBaseViewHolder) viewHolder).upvoteButton.performClick();
+            } else {
+                ((PostCompactBaseViewHolder) viewHolder).downvoteButton.performClick();
             }
         }
     }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/CommentsListingFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/CommentsListingFragment.java
index 6a866fef..5be5e0ca 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/CommentsListingFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/CommentsListingFragment.java
@@ -5,8 +5,13 @@ import android.app.Activity;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.VibrationEffect;
+import android.os.Vibrator;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -16,8 +21,10 @@ import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.content.res.ResourcesCompat;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
@@ -42,6 +49,7 @@ import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.SortType;
 import ml.docilealligator.infinityforreddit.Utils.SharedPreferencesUtils;
+import ml.docilealligator.infinityforreddit.Utils.Utils;
 import retrofit2.Retrofit;
 
 
@@ -97,6 +105,12 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
     private LinearLayoutManager mLinearLayoutManager;
     private CommentsListingRecyclerViewAdapter mAdapter;
     private SortType sortType;
+    private ColorDrawable backgroundLeft;
+    private ColorDrawable backgroundRight;
+    private Drawable drawableLeft;
+    private Drawable drawableRight;
+    private float swipeActionThreshold = 0.3f;
+    private ItemTouchHelper touchHelper;
 
     public CommentsListingFragment() {
         // Required empty public constructor
@@ -128,6 +142,114 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
             }
         }
 
+        boolean enableSwipeAction = mSharedPreferences.getBoolean(SharedPreferencesUtils.ENABLE_SWIPE_ACTION, false);
+        boolean vibrateWhenActionTriggered = mSharedPreferences.getBoolean(SharedPreferencesUtils.VIBRATE_WHEN_ACTION_TRIGGERED, true);
+        Vibrator v = (Vibrator) mActivity.getSystemService(Context.VIBRATOR_SERVICE);
+        backgroundLeft = new ColorDrawable(customThemeWrapper.getDownvoted());
+        backgroundRight = new ColorDrawable(customThemeWrapper.getUpvoted());
+        drawableLeft = ResourcesCompat.getDrawable(resources, R.drawable.ic_arrow_downward_black_24dp, null);
+        drawableRight = ResourcesCompat.getDrawable(resources, R.drawable.ic_arrow_upward_black_24dp, null);
+        touchHelper = new ItemTouchHelper(new ItemTouchHelper.Callback() {
+            boolean exceedThreshold = false;
+
+            @Override
+            public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
+                if (!(viewHolder instanceof CommentsListingRecyclerViewAdapter.CommentViewHolder)) {
+                    return makeMovementFlags(0, 0);
+                }
+                int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
+                return makeMovementFlags(0, swipeFlags);
+            }
+
+            @Override
+            public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
+                return false;
+            }
+
+            @Override
+            public boolean isItemViewSwipeEnabled() {
+                return true;
+            }
+
+            @Override
+            public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
+                if (touchHelper != null) {
+                    touchHelper.attachToRecyclerView(null);
+                    touchHelper.attachToRecyclerView(mCommentRecyclerView);
+                    if (mAdapter != null) {
+                        mAdapter.onItemSwipe(viewHolder, direction);
+                    }
+                }
+            }
+
+            @Override
+            public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
+                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+
+                View itemView = viewHolder.itemView;
+                int horizontalOffset = (int) Utils.convertDpToPixel(16, mActivity);
+                if (dX > 0) {
+                    if (dX > (itemView.getRight() - itemView.getLeft()) * swipeActionThreshold) {
+                        if (!exceedThreshold) {
+                            exceedThreshold = true;
+                            if (vibrateWhenActionTriggered && v != null) {
+                                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                    v.vibrate(VibrationEffect.createOneShot(10, 175));
+                                } else {
+                                    //deprecated in API 26
+                                    v.vibrate(10);
+                                }
+                            }
+                        }
+                        backgroundLeft.setBounds(0, itemView.getTop(), itemView.getRight(), itemView.getBottom());
+                    } else {
+                        exceedThreshold = false;
+                        backgroundLeft.setBounds(0, 0, 0, 0);
+                    }
+
+                    drawableLeft.setBounds(itemView.getLeft() + ((int) dX) - horizontalOffset - drawableLeft.getIntrinsicWidth(),
+                            (itemView.getBottom() + itemView.getTop() - drawableLeft.getIntrinsicHeight()) / 2,
+                            itemView.getLeft() + ((int) dX) - horizontalOffset,
+                            (itemView.getBottom() + itemView.getTop() + drawableLeft.getIntrinsicHeight()) / 2);
+                    backgroundLeft.draw(c);
+                    drawableLeft.draw(c);
+                } else if (dX < 0) {
+                    if (-dX > (itemView.getRight() - itemView.getLeft()) * swipeActionThreshold) {
+                        if (!exceedThreshold) {
+                            exceedThreshold = true;
+                            if (vibrateWhenActionTriggered && v != null) {
+                                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                                    v.vibrate(VibrationEffect.createOneShot(10, 175));
+                                } else {
+                                    //deprecated in API 26
+                                    v.vibrate(10);
+                                }
+                            }
+                        }
+                        backgroundRight.setBounds(0, itemView.getTop(), itemView.getRight(), itemView.getBottom());
+                    } else {
+                        exceedThreshold = false;
+                        backgroundRight.setBounds(0, 0, 0, 0);
+                    }
+                    drawableRight.setBounds(itemView.getRight() + ((int) dX) + horizontalOffset,
+                            (itemView.getBottom() + itemView.getTop() - drawableRight.getIntrinsicHeight()) / 2,
+                            itemView.getRight() + ((int) dX) + horizontalOffset + drawableRight.getIntrinsicWidth(),
+                            (itemView.getBottom() + itemView.getTop() + drawableRight.getIntrinsicHeight()) / 2);
+                    backgroundRight.draw(c);
+                    drawableRight.draw(c);
+                }
+            }
+
+            @Override
+            public float getSwipeThreshold(@NonNull RecyclerView.ViewHolder viewHolder) {
+                return swipeActionThreshold;
+            }
+        });
+
+        if (enableSwipeAction) {
+            touchHelper.attachToRecyclerView(mCommentRecyclerView);
+        }
+
         if (savedInstanceState == null) {
             getCurrentAccountAndBindView(resources);
         } else {
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
index 37264783..f6361088 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Fragment/PostFragment.java
@@ -635,7 +635,6 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
         }
 
         Vibrator v = (Vibrator) activity.getSystemService(Context.VIBRATOR_SERVICE);
-        // Vibrate for 500 milliseconds
         backgroundLeft = new ColorDrawable(customThemeWrapper.getDownvoted());
         backgroundRight = new ColorDrawable(customThemeWrapper.getUpvoted());
         drawableLeft = ResourcesCompat.getDrawable(activity.getResources(), R.drawable.ic_arrow_downward_black_24dp, null);