From d74c7f50fa95220671326d83314235ca8aacc428 Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Sun, 29 Dec 2019 21:38:30 +0800
Subject: Prevent activity from sliding right when the markdown table is
 swiping left by user by using a custom LinearLayoutManager instead of setting
 the sensitivity of the Slidr library.

---
 .../Activity/ViewPostDetailActivity.java           | 20 +++++++----
 .../Adapter/CommentAndPostRecyclerViewAdapter.java | 27 ++++++++++++--
 .../CustomView/MarkwonLinearLayoutManager.java     | 42 ++++++++++++++++++++++
 3 files changed, 81 insertions(+), 8 deletions(-)
 create mode 100644 app/src/main/java/ml/docilealligator/infinityforreddit/CustomView/MarkwonLinearLayoutManager.java

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 c51c2bc5..11cc629d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Activity/ViewPostDetailActivity.java
@@ -37,7 +37,7 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.livefront.bridge.Bridge;
 import com.r0adkll.slidr.Slidr;
-import com.r0adkll.slidr.model.SlidrConfig;
+import com.r0adkll.slidr.model.SlidrInterface;
 
 import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
@@ -176,7 +176,8 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
     private LinearLayoutManager mLinearLayoutManager;
     private CommentAndPostRecyclerViewAdapter mAdapter;
     private RecyclerView.SmoothScroller mSmoothScroller;
-    private PostCommentSortTypeBottomSheetFragment postCommentSortTypeBottomSheetFragment;
+    private PostCommentSortTypeBottomSheetFragment mPostCommentSortTypeBottomSheetFragment;
+    private SlidrInterface mSlidrInterface;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -193,8 +194,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
         EventBus.getDefault().register(this);
 
         if (mSharedPreferences.getBoolean(SharedPreferencesUtils.SWIPE_RIGHT_TO_GO_BACK_FROM_POST_DETAIL, true)) {
-            SlidrConfig config = new SlidrConfig.Builder().sensitivity(0.1f).build();
-            Slidr.attach(this, config);
+            mSlidrInterface = Slidr.attach(this);
         }
 
         Resources resources = getResources();
@@ -349,7 +349,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
             postListPosition = getIntent().getIntExtra(EXTRA_POST_LIST_POSITION, -1);
         }
 
-        postCommentSortTypeBottomSheetFragment = new PostCommentSortTypeBottomSheetFragment();
+        mPostCommentSortTypeBottomSheetFragment = new PostCommentSortTypeBottomSheetFragment();
     }
 
     @Override
@@ -1306,7 +1306,7 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
                 return true;
             case R.id.action_sort_view_post_detail_activity:
                 if (mPost != null) {
-                    postCommentSortTypeBottomSheetFragment.show(getSupportFragmentManager(), postCommentSortTypeBottomSheetFragment.getTag());
+                    mPostCommentSortTypeBottomSheetFragment.show(getSupportFragmentManager(), mPostCommentSortTypeBottomSheetFragment.getTag());
                 }
                 return true;
             case R.id.action_view_crosspost_parent_view_post_detail_activity:
@@ -1524,4 +1524,12 @@ public class ViewPostDetailActivity extends BaseActivity implements FlairBottomS
         fetchComments(false, false, sortType.getType().value);
         mSharedPreferences.edit().putString(SharedPreferencesUtils.SORT_TYPE_POST_COMMENT, sortType.getType().name()).apply();
     }
+
+    public void lockSwipeRightToGoBack() {
+        mSlidrInterface.lock();
+    }
+
+    public void unlockSwipeRightToGoBack() {
+        mSlidrInterface.unlock();
+    }
 }
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 806d60a7..cd56c175 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/Adapter/CommentAndPostRecyclerViewAdapter.java
@@ -72,6 +72,7 @@ import ml.docilealligator.infinityforreddit.AsyncTask.LoadSubredditIconAsyncTask
 import ml.docilealligator.infinityforreddit.AsyncTask.LoadUserDataAsyncTask;
 import ml.docilealligator.infinityforreddit.CommentData;
 import ml.docilealligator.infinityforreddit.CustomView.AspectRatioGifImageView;
+import ml.docilealligator.infinityforreddit.CustomView.MarkwonLinearLayoutManager;
 import ml.docilealligator.infinityforreddit.FetchComment;
 import ml.docilealligator.infinityforreddit.Fragment.ModifyCommentBottomSheetFragment;
 import ml.docilealligator.infinityforreddit.Post;
@@ -507,7 +508,18 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
 
                     if (mPost.getSelfText() != null && !mPost.getSelfText().equals("")) {
                         ((PostDetailViewHolder) holder).mContentMarkdownView.setVisibility(View.VISIBLE);
-                        ((PostDetailViewHolder) holder).mContentMarkdownView.setLayoutManager(new LinearLayoutManager(mActivity));
+                        LinearLayoutManager linearLayoutManager = new MarkwonLinearLayoutManager(mActivity, new MarkwonLinearLayoutManager.HorizontalScrollViewScrolledListener() {
+                            @Override
+                            public void onScrolledLeft() {
+                                ((ViewPostDetailActivity) mActivity).lockSwipeRightToGoBack();
+                            }
+
+                            @Override
+                            public void onScrolledRight() {
+                                ((ViewPostDetailActivity) mActivity).unlockSwipeRightToGoBack();
+                            }
+                        });
+                        ((PostDetailViewHolder) holder).mContentMarkdownView.setLayoutManager(linearLayoutManager);
                         ((PostDetailViewHolder) holder).mContentMarkdownView.setAdapter(mMarkwonAdapter);
                         mMarkwonAdapter.setMarkdown(mMarkwon, mPost.getSelfText());
                         mMarkwonAdapter.notifyDataSetChanged();
@@ -530,7 +542,18 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
 
                     if (!mPost.getSelfText().equals("")) {
                         ((PostDetailViewHolder) holder).mContentMarkdownView.setVisibility(View.VISIBLE);
-                        ((PostDetailViewHolder) holder).mContentMarkdownView.setLayoutManager(new LinearLayoutManager(mActivity));
+                        LinearLayoutManager linearLayoutManager = new MarkwonLinearLayoutManager(mActivity, new MarkwonLinearLayoutManager.HorizontalScrollViewScrolledListener() {
+                            @Override
+                            public void onScrolledLeft() {
+                                ((ViewPostDetailActivity) mActivity).lockSwipeRightToGoBack();
+                            }
+
+                            @Override
+                            public void onScrolledRight() {
+                                ((ViewPostDetailActivity) mActivity).unlockSwipeRightToGoBack();
+                            }
+                        });
+                        ((PostDetailViewHolder) holder).mContentMarkdownView.setLayoutManager(linearLayoutManager);
                         ((PostDetailViewHolder) holder).mContentMarkdownView.setAdapter(mMarkwonAdapter);
                         mMarkwonAdapter.setMarkdown(mMarkwon, mPost.getSelfText());
                         mMarkwonAdapter.notifyDataSetChanged();
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CustomView/MarkwonLinearLayoutManager.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CustomView/MarkwonLinearLayoutManager.java
new file mode 100644
index 00000000..56f3dddc
--- /dev/null
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CustomView/MarkwonLinearLayoutManager.java
@@ -0,0 +1,42 @@
+package ml.docilealligator.infinityforreddit.CustomView;
+
+import android.content.Context;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.HorizontalScrollView;
+
+import androidx.recyclerview.widget.LinearLayoutManager;
+
+public class MarkwonLinearLayoutManager extends LinearLayoutManager {
+    public interface HorizontalScrollViewScrolledListener {
+        void onScrolledLeft();
+        void onScrolledRight();
+    }
+
+    private HorizontalScrollViewScrolledListener horizontalScrollViewScrolledListener;
+
+    public MarkwonLinearLayoutManager(Context context, HorizontalScrollViewScrolledListener horizontalScrollViewScrolledListener) {
+        super(context);
+        this.horizontalScrollViewScrolledListener = horizontalScrollViewScrolledListener;
+    }
+
+    @Override
+    public void addView(View child) {
+        super.addView(child);
+        if (child instanceof HorizontalScrollView) {
+            child.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
+                private int x = 0;
+                @Override
+                public void onScrollChanged() {
+                    if (child.getScrollX() < x) {
+                        horizontalScrollViewScrolledListener.onScrolledLeft();
+                    } else {
+                        horizontalScrollViewScrolledListener.onScrolledRight();
+                    }
+
+                    x = child.getScrollX();
+                }
+            });
+        }
+    }
+}
-- 
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