From 1b2602ac3ac95ab556062ca4d9f336675d26459d Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Tue, 1 Dec 2020 23:53:37 +0800
Subject: [PATCH] Maybe fix IndexOutOfBoundsException when parsing spoiler
 syntax.

---
 .../activities/FullMarkdownActivity.java               |  5 +++++
 .../adapters/CommentAndPostRecyclerViewAdapter.java    | 10 ++++++++++
 .../adapters/CommentsListingRecyclerViewAdapter.java   |  5 +++++
 .../adapters/MessageRecyclerViewAdapter.java           |  5 +++++
 4 files changed, 25 insertions(+)

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/FullMarkdownActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/FullMarkdownActivity.java
index f874244c..5e0ce147 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/FullMarkdownActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/FullMarkdownActivity.java
@@ -145,6 +145,11 @@ public class FullMarkdownActivity extends BaseActivity {
                         int start = 0;
                         boolean find = false;
                         while (matcher.find(start)) {
+                            if (markdownStringBuilder.length() < 4
+                                    || matcher.start() < 0
+                                    || matcher.end() > markdownStringBuilder.length()) {
+                                break;
+                            }
                             find = true;
                             markdownStringBuilder.delete(matcher.end() - 2, matcher.end());
                             markdownStringBuilder.delete(matcher.start(), matcher.start() + 2);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentAndPostRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentAndPostRecyclerViewAdapter.java
index 682f7157..6a4dc4db 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentAndPostRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentAndPostRecyclerViewAdapter.java
@@ -279,6 +279,11 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
                         int start = 0;
                         boolean find = false;
                         while (matcher.find(start)) {
+                            if (markdownStringBuilder.length() < 4
+                                    || matcher.start() < 0
+                                    || matcher.end() > markdownStringBuilder.length()) {
+                                break;
+                            }
                             find = true;
                             markdownStringBuilder.delete(matcher.end() - 2, matcher.end());
                             markdownStringBuilder.delete(matcher.start(), matcher.start() + 2);
@@ -375,6 +380,11 @@ public class CommentAndPostRecyclerViewAdapter extends RecyclerView.Adapter<Recy
                         int start = 0;
                         boolean find = false;
                         while (matcher.find(start)) {
+                            if (markdownStringBuilder.length() < 4
+                                    || matcher.start() < 0
+                                    || matcher.end() > markdownStringBuilder.length()) {
+                                break;
+                            }
                             find = true;
                             markdownStringBuilder.delete(matcher.end() - 2, matcher.end());
                             markdownStringBuilder.delete(matcher.start(), matcher.start() + 2);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsListingRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsListingRecyclerViewAdapter.java
index fad4476f..25f19384 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsListingRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsListingRecyclerViewAdapter.java
@@ -136,6 +136,11 @@ public class CommentsListingRecyclerViewAdapter extends PagedListAdapter<Comment
                         int start = 0;
                         boolean find = false;
                         while (matcher.find(start)) {
+                            if (markdownStringBuilder.length() < 4
+                                    || matcher.start() < 0
+                                    || matcher.end() > markdownStringBuilder.length()) {
+                                break;
+                            }
                             find = true;
                             markdownStringBuilder.delete(matcher.end() - 2, matcher.end());
                             markdownStringBuilder.delete(matcher.start(), matcher.start() + 2);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/MessageRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/MessageRecyclerViewAdapter.java
index b4d74f96..04ec62f2 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/MessageRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/adapters/MessageRecyclerViewAdapter.java
@@ -121,6 +121,11 @@ public class MessageRecyclerViewAdapter extends PagedListAdapter<Message, Recycl
                         int start = 0;
                         boolean find = false;
                         while (matcher.find(start)) {
+                            if (markdownStringBuilder.length() < 4
+                                    || matcher.start() < 0
+                                    || matcher.end() > markdownStringBuilder.length()) {
+                                break;
+                            }
                             find = true;
                             markdownStringBuilder.delete(matcher.end() - 2, matcher.end());
                             markdownStringBuilder.delete(matcher.start(), matcher.start() + 2);