From e9cec91a5b53995ca6134d8e8bf9cc2c30e16735 Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Sun, 23 Jun 2019 16:28:08 +0800
Subject: Calculate the comment placeholder position if the position was
 changed.

---
 .../infinityforreddit/CommentData.java             |   3 +-
 .../CommentRecyclerViewAdapter.java                | 117 +++++++++++++++------
 .../infinityforreddit/ParseComment.java            |  11 +-
 app/src/main/res/layout/item_comment.xml           |  13 +--
 4 files changed, 94 insertions(+), 50 deletions(-)

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
index 7812a6c8..516253a1 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
@@ -50,7 +50,8 @@ class CommentData implements Parcelable {
         isPlaceHolder = false;
     }
 
-    CommentData(int depth) {
+    CommentData(String parentFullName, int depth) {
+        this.fullName = parentFullName;
         this.depth = depth;
         isPlaceHolder = true;
         isLoadingMoreChildren = false;
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentRecyclerViewAdapter.java
index 5b704cdb..8d4752d7 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentRecyclerViewAdapter.java
@@ -9,7 +9,6 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
-import android.widget.ProgressBar;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -309,27 +308,54 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
                                 && parentComment.getFullName().equals(mVisibleComments.get(parentPosition).getFullName())) {
                             if(mVisibleComments.get(parentPosition).isExpanded()) {
                                 if(mVisibleComments.get(parentPosition).getChildren().size() > childrenStartingIndex) {
-                                    mVisibleComments.get(position).setLoadingMoreChildren(false);
-                                    mVisibleComments.get(position).setLoadMoreChildrenFailed(false);
-                                    notifyItemChanged(position);
-
                                     mVisibleComments.get(parentPosition).setMoreChildrenStartingIndex(childrenStartingIndex);
                                     mVisibleComments.get(parentPosition).getChildren().get(mVisibleComments.get(parentPosition).getChildren().size() - 1)
                                             .setLoadingMoreChildren(false);
                                     mVisibleComments.get(parentPosition).getChildren().get(mVisibleComments.get(parentPosition).getChildren().size() - 1)
                                             .setLoadMoreChildrenFailed(false);
 
-                                    mVisibleComments.addAll(position, expandedComments);
-                                    notifyItemRangeInserted(position, expandedComments.size());
+                                    int placeholderPosition = position;
+                                    if(mVisibleComments.get(position).getFullName().equals(parentComment.getFullName())) {
+                                        for(int i = parentPosition + 1; i < mVisibleComments.size(); i++) {
+                                            if(mVisibleComments.get(i).getFullName().equals(parentComment.getFullName())) {
+                                                placeholderPosition = i;
+                                                break;
+                                            }
+                                        }
+                                    }
+
+                                    mVisibleComments.get(placeholderPosition).setLoadingMoreChildren(false);
+                                    mVisibleComments.get(placeholderPosition).setLoadMoreChildrenFailed(false);
+                                    notifyItemChanged(placeholderPosition);
+
+                                    mVisibleComments.addAll(placeholderPosition, expandedComments);
+                                    notifyItemRangeInserted(placeholderPosition, expandedComments.size());
                                 } else {
                                     mVisibleComments.get(parentPosition).getChildren()
                                             .remove(mVisibleComments.get(parentPosition).getChildren().size() - 1);
-                                    mVisibleComments.remove(position);
-                                    notifyItemRemoved(position);
                                     mVisibleComments.get(parentPosition).removeMoreChildrenFullnames();
 
-                                    mVisibleComments.addAll(position, expandedComments);
-                                    notifyItemRangeInserted(position, expandedComments.size());
+                                    int placeholderPosition = position;
+                                    if(mVisibleComments.get(position).getFullName().equals(parentComment.getFullName())) {
+                                        for(int i = parentPosition + 1; i < mVisibleComments.size(); i++) {
+                                            if(mVisibleComments.get(i).getFullName().equals(parentComment.getFullName())) {
+                                                placeholderPosition = i;
+                                                break;
+                                            }
+                                        }
+                                    }
+
+                                    mVisibleComments.remove(placeholderPosition);
+                                    notifyItemRemoved(placeholderPosition);
+
+                                    mVisibleComments.addAll(placeholderPosition, expandedComments);
+                                    notifyItemRangeInserted(placeholderPosition, expandedComments.size());
+                                }
+                            } else {
+                                if(mVisibleComments.get(parentPosition).hasReply() && mVisibleComments.get(parentPosition).getChildren().size() <= childrenStartingIndex) {
+                                    mVisibleComments.get(parentPosition).getChildren()
+                                            .remove(mVisibleComments.get(parentPosition).getChildren().size() - 1);
+                                    mVisibleComments.get(parentPosition).removeMoreChildrenFullnames();
                                 }
                             }
 
@@ -337,17 +363,24 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
                         } else {
                             for(int i = 0; i < mVisibleComments.size(); i++) {
                                 if(mVisibleComments.get(i).getFullName().equals(parentComment.getFullName())) {
-                                    mVisibleComments.get(i).setMoreChildrenStartingIndex(childrenStartingIndex);
-
                                     if(mVisibleComments.get(i).isExpanded()) {
-                                        mVisibleComments.get(i + mVisibleComments.get(i).getChildren().size()).setLoadingMoreChildren(false);
-                                        mVisibleComments.get(i + mVisibleComments.get(i).getChildren().size()).setLoadMoreChildrenFailed(false);
-                                        notifyItemChanged(i + mVisibleComments.get(i).getChildren().size());
-
-                                        mVisibleComments.addAll(i + mVisibleComments.get(i).getChildren().size(),
-                                                expandedComments);
-                                        notifyItemRangeInserted(i + mVisibleComments.get(i).getChildren().size(),
-                                                expandedComments.size());
+                                        int placeholderPosition = i + mVisibleComments.get(i).getChildren().size();
+
+                                        if(!mVisibleComments.get(i).getFullName()
+                                                .equals(mVisibleComments.get(placeholderPosition).getFullName())) {
+                                            for(int j = i + 1; j < mVisibleComments.size(); j++) {
+                                                if(mVisibleComments.get(j).getFullName().equals(mVisibleComments.get(i).getFullName())) {
+                                                    placeholderPosition = j;
+                                                }
+                                            }
+                                        }
+
+                                        mVisibleComments.get(placeholderPosition).setLoadingMoreChildren(false);
+                                        mVisibleComments.get(placeholderPosition).setLoadMoreChildrenFailed(false);
+                                        notifyItemChanged(placeholderPosition);
+
+                                        mVisibleComments.addAll(placeholderPosition, expandedComments);
+                                        notifyItemRangeInserted(placeholderPosition, expandedComments.size());
                                     }
 
                                     mVisibleComments.get(i).getChildren().get(mVisibleComments.get(i).getChildren().size() - 1)
@@ -367,9 +400,19 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
                         if(parentPosition < mVisibleComments.size()
                                 && parentComment.getFullName().equals(mVisibleComments.get(parentPosition).getFullName())) {
                             if(mVisibleComments.get(parentPosition).isExpanded()) {
-                                mVisibleComments.get(position).setLoadingMoreChildren(false);
-                                mVisibleComments.get(position).setLoadMoreChildrenFailed(true);
-                                notifyItemChanged(position);
+                                int placeholderPosition = position;
+                                if(!mVisibleComments.get(position).getFullName().equals(parentComment.getFullName())) {
+                                    for(int i = parentPosition + 1; i < mVisibleComments.size(); i++) {
+                                        if(mVisibleComments.get(i).getFullName().equals(parentComment.getFullName())) {
+                                            placeholderPosition = i;
+                                            break;
+                                        }
+                                    }
+                                }
+
+                                mVisibleComments.get(placeholderPosition).setLoadingMoreChildren(false);
+                                mVisibleComments.get(placeholderPosition).setLoadMoreChildrenFailed(true);
+                                notifyItemChanged(placeholderPosition);
                             }
 
                             mVisibleComments.get(parentPosition).getChildren().get(mVisibleComments.get(parentPosition).getChildren().size() - 1)
@@ -380,9 +423,19 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
                             for(int i = 0; i < mVisibleComments.size(); i++) {
                                 if(mVisibleComments.get(i).getFullName().equals(parentComment.getFullName())) {
                                     if(mVisibleComments.get(i).isExpanded()) {
-                                        mVisibleComments.get(i + mVisibleComments.get(i).getChildren().size()).setLoadingMoreChildren(false);
-                                        mVisibleComments.get(i + mVisibleComments.get(i).getChildren().size()).setLoadMoreChildrenFailed(true);
-                                        notifyItemChanged(i + mVisibleComments.get(i).getChildren().size());
+                                        int placeholderPosition = i + mVisibleComments.get(i).getChildren().size();
+                                        if(!mVisibleComments.get(placeholderPosition).getFullName().equals(mVisibleComments.get(i).getFullName())) {
+                                            for(int j = i + 1; j < mVisibleComments.size(); j++) {
+                                                if(mVisibleComments.get(j).getFullName().equals(mVisibleComments.get(i).getFullName())) {
+                                                    placeholderPosition = j;
+                                                    break;
+                                                }
+                                            }
+                                        }
+
+                                        mVisibleComments.get(placeholderPosition).setLoadingMoreChildren(false);
+                                        mVisibleComments.get(placeholderPosition).setLoadMoreChildrenFailed(true);
+                                        notifyItemChanged(placeholderPosition);
                                     }
 
                                     mVisibleComments.get(i).getChildren().get(mVisibleComments.get(i).getChildren().size() - 1).setLoadingMoreChildren(false);
@@ -478,7 +531,6 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
     public void onViewRecycled(@NonNull RecyclerView.ViewHolder holder) {
         if (holder instanceof CommentViewHolder) {
             ((CommentViewHolder) holder).expandButton.setVisibility(View.GONE);
-            ((CommentViewHolder) holder).loadMoreCommentsProgressBar.setVisibility(View.GONE);
         }
     }
 
@@ -487,14 +539,13 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
         return mVisibleComments.size();
     }
 
-    class CommentViewHolder extends RecyclerView.ViewHolder {
+    static class CommentViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.author_text_view_item_post_comment) TextView authorTextView;
         @BindView(R.id.comment_time_text_view_item_post_comment) TextView commentTimeTextView;
         @BindView(R.id.comment_markdown_view_item_post_comment) MarkwonView commentMarkdownView;
         @BindView(R.id.plus_button_item_post_comment) ImageView upvoteButton;
         @BindView(R.id.score_text_view_item_post_comment) TextView scoreTextView;
         @BindView(R.id.minus_button_item_post_comment) ImageView downvoteButton;
-        @BindView(R.id.load_more_comments_progress_bar) ProgressBar loadMoreCommentsProgressBar;
         @BindView(R.id.expand_button_item_post_comment) ImageView expandButton;
         @BindView(R.id.share_button_item_post_comment) ImageView shareButton;
         @BindView(R.id.reply_button_item_post_comment) ImageView replyButton;
@@ -506,7 +557,7 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
         }
     }
 
-    class LoadMoreCommentViewHolder extends RecyclerView.ViewHolder {
+    static class LoadMoreCommentViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.vertical_block_item_load_more_comments) View verticalBlock;
         @BindView(R.id.load_more_comments_text_view_item_load_more_comments) TextView textView;
 
@@ -516,7 +567,7 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
         }
     }
 
-    class IsLoadingMoreCommentViewHolder extends RecyclerView.ViewHolder {
+    static class IsLoadingMoreCommentViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.vertical_block_item_is_loading_more_comments) View verticalBlock;
 
         IsLoadingMoreCommentViewHolder(View itemView) {
@@ -525,7 +576,7 @@ class CommentRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewH
         }
     }
 
-    class LoadMoreCommentFailedViewHolder extends RecyclerView.ViewHolder {
+    static class LoadMoreCommentFailedViewHolder extends RecyclerView.ViewHolder {
         @BindView(R.id.vertical_block_item_load_more_comments_failed) View verticalBlock;
         @BindView(R.id.retry_text_view_item_load_more_comments_failed) TextView retryTextView;
 
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
index 61ca80a4..97170b5b 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
@@ -93,7 +93,7 @@ class ParseComment {
         protected Void doInBackground(Void... voids) {
             try {
                 parseCommentRecursion(commentsJSONArray, newComments, moreChildrenFullnames, depth, locale);
-                makeChildrenVisible(newComments, expandedNewComments);
+                expandChildren(newComments, expandedNewComments);
             } catch (JSONException e) {
                 parseFailed = true;
                 if(e.getMessage() != null) {
@@ -156,17 +156,18 @@ class ParseComment {
         }
     }
 
-    private static void makeChildrenVisible(ArrayList<CommentData> comments, ArrayList<CommentData> visibleComments) {
+    private static void expandChildren(ArrayList<CommentData> comments, ArrayList<CommentData> visibleComments) {
         for(CommentData c : comments) {
             visibleComments.add(c);
             if(c.hasReply()) {
                 c.setExpanded(true);
-                makeChildrenVisible(c.getChildren(), visibleComments);
+                expandChildren(c.getChildren(), visibleComments);
             }
             if(c.hasMoreChildrenFullnames() && c.getMoreChildrenFullnames().size() > c.getMoreChildrenStartingIndex()) {
                 //Add a load more placeholder
-                visibleComments.add(new CommentData(c.getDepth() + 1));
-                c.addChild(new CommentData(c.getDepth() + 1), c.getChildren().size());
+                CommentData placeholder = new CommentData(c.getFullName(), c.getDepth() + 1);
+                visibleComments.add(placeholder);
+                c.addChild(placeholder, c.getChildren().size());
             }
         }
     }
diff --git a/app/src/main/res/layout/item_comment.xml b/app/src/main/res/layout/item_comment.xml
index a4a3c043..088943f7 100644
--- a/app/src/main/res/layout/item_comment.xml
+++ b/app/src/main/res/layout/item_comment.xml
@@ -9,7 +9,7 @@
 
         <View
             android:id="@+id/vertical_block_item_post_comment"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:background="@color/textColorPrimaryDark"/>
 
@@ -36,9 +36,8 @@
 
                 <TextView
                     android:id="@+id/comment_time_text_view_item_post_comment"
-                    android:layout_width="0dp"
+                    android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:layout_weight="1"
                     android:gravity="end" />
 
             </LinearLayout>
@@ -92,14 +91,6 @@
                     android:clickable="true"
                     android:focusable="true"/>
 
-                <ProgressBar
-                    android:id="@+id/load_more_comments_progress_bar"
-                    android:layout_width="20dp"
-                    android:layout_height="20dp"
-                    android:layout_marginEnd="16dp"
-                    android:layout_toStartOf="@id/expand_button_item_post_comment"
-                    android:visibility="gone"/>
-
                 <ImageView
                     android:id="@+id/expand_button_item_post_comment"
                     android:layout_width="wrap_content"
-- 
cgit v1.2.3