Fix formatting for checklist notes

app/src/main/kotlin/com/simplemobiletools/notes/pro/adapters/OpenNoteAdapter.kt

@@ -1,15 +1,24 @@
 package com.simplemobiletools.notes.pro.adapters
 
+import android.content.Context
+import android.text.SpannableString
+import android.text.style.StrikethroughSpan
 import android.view.Menu
 import android.view.View
 import android.view.ViewGroup
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.commons.activities.BaseSimpleActivity
 import com.simplemobiletools.commons.adapters.MyRecyclerViewAdapter
 import com.simplemobiletools.commons.extensions.getColoredDrawableWithColor
 import com.simplemobiletools.commons.helpers.MEDIUM_ALPHA_INT
+import com.simplemobiletools.commons.helpers.SORT_BY_CUSTOM
 import com.simplemobiletools.commons.views.MyRecyclerView
 import com.simplemobiletools.notes.pro.R
+import com.simplemobiletools.notes.pro.extensions.config
+import com.simplemobiletools.notes.pro.models.ChecklistItem
 import com.simplemobiletools.notes.pro.models.Note
+import com.simplemobiletools.notes.pro.models.NoteType
 import kotlinx.android.synthetic.main.open_note_item.view.open_note_item_holder
 import kotlinx.android.synthetic.main.open_note_item.view.open_note_item_text
 import kotlinx.android.synthetic.main.open_note_item.view.open_note_item_title
@@ -58,9 +67,50 @@ class OpenNoteAdapter(
                 setTextColor(properPrimaryColor)
             }
             open_note_item_text.apply {
-                text = note.getNoteStoredValue(context)
+                text = note.getFormattedValue(context)
                 setTextColor(textColor)
             }
         }
     }
+
+    private fun Note.getFormattedValue(context: Context): CharSequence? {
+        return when (type) {
+            NoteType.TYPE_TEXT -> getNoteStoredValue(context)
+            NoteType.TYPE_CHECKLIST -> {
+                val checklistItemType = object : TypeToken<List<ChecklistItem>>() {}.type
+                var items = Gson().fromJson<List<ChecklistItem>>(getNoteStoredValue(context), checklistItemType) ?: listOf()
+                items = items.filter { it.title != null }.let {
+                    val sorting = context.config.sorting
+                    ChecklistItem.sorting = sorting
+                    if (ChecklistItem.sorting and SORT_BY_CUSTOM == 0) {
+                        it.sorted().let {
+                            if (context.config?.moveDoneChecklistItems == true) {
+                                it.sortedBy { it.isDone }
+                            } else {
+                                it
+                            }
+                        }
+                    } else {
+                        it
+                    }
+                }
+                val linePrefix = "• "
+                val stringifiedItems = items.joinToString(separator = System.lineSeparator()) {
+                    "${linePrefix}${it.title}"
+                }
+
+                val formattedText = SpannableString(stringifiedItems)
+                var currentPos = 0
+                items.forEach { item ->
+                    currentPos += linePrefix.length
+                    if (item.isDone) {
+                        formattedText.setSpan(StrikethroughSpan(), currentPos, currentPos + item.title.length, 0)
+                    }
+                    currentPos += item.title.length
+                    currentPos += System.lineSeparator().length
+                }
+                formattedText
+            }
+        }
+    }
 }