properly handle password protection of menu items

app/src/main/kotlin/com/simplemobiletools/notes/pro/activities/MainActivity.kt

@@ -169,26 +169,27 @@ class MainActivity : SimpleActivity() {
             saveCurrentNote(false)
         }
 
+        val fragment = getCurrentFragment()
         when (item.itemId) {
-            R.id.open_search -> openSearch()
+            R.id.open_search -> fragment?.handleUnlocking { openSearch() }
             R.id.open_note -> displayOpenNoteDialog()
-            R.id.save_note -> saveNote()
+            R.id.save_note -> fragment?.handleUnlocking { saveNote() }
             R.id.undo -> undo()
             R.id.redo -> redo()
             R.id.new_note -> displayNewNoteDialog()
-            R.id.rename_note -> displayRenameDialog()
-            R.id.share -> shareText()
+            R.id.rename_note -> fragment?.handleUnlocking { displayRenameDialog() }
+            R.id.share -> fragment?.handleUnlocking { shareText() }
             R.id.lock_note -> lockNote()
             R.id.unlock_note -> unlockNote()
             R.id.open_file -> tryOpenFile()
             R.id.import_folder -> openFolder()
-            R.id.export_as_file -> tryExportAsFile()
+            R.id.export_as_file -> fragment?.handleUnlocking { tryExportAsFile() }
             R.id.export_all_notes -> tryExportAllNotes()
-            R.id.print -> printText()
-            R.id.delete_note -> displayDeleteNotePrompt()
+            R.id.print -> fragment?.handleUnlocking { printText() }
+            R.id.delete_note -> fragment?.handleUnlocking { displayDeleteNotePrompt() }
             R.id.settings -> startActivity(Intent(applicationContext, SettingsActivity::class.java))
             R.id.about -> launchAbout()
-            R.id.remove_done_items -> removeDoneItems()
+            R.id.remove_done_items -> fragment?.handleUnlocking { removeDoneItems() }
             else -> return super.onOptionsItemSelected(item)
         }
         return true
@@ -421,6 +422,8 @@ class MainActivity : SimpleActivity() {
         }
     }
 
+    private fun getCurrentFragment() = mAdapter?.getFragment(view_pager.currentItem)
+
     private val currentTextFragment: TextFragment? get() = mAdapter?.textFragment(view_pager.currentItem)
 
     private fun selectSearchMatch(editText: MyEditText) {
@@ -775,7 +778,7 @@ class MainActivity : SimpleActivity() {
                 var failCount = 0
                 NotesHelper(this).getNotes {
                     mNotes = it
-                    mNotes.forEachIndexed { index, note ->
+                    mNotes.filter { !it.isLocked() }.forEachIndexed { index, note ->
                         val filename = if (extension.isEmpty()) note.title else "${note.title}.$extension"
                         val file = File(parent, filename)
                         if (!filename.isAValidFilename()) {

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

@@ -45,6 +45,8 @@ class NotesPagerAdapter(fm: FragmentManager, val notes: List<Note>, val activity
         }
     }
 
+    fun getFragment(position: Int) = fragments[position]
+
     fun isChecklistFragment(position: Int): Boolean = (fragments[position] is ChecklistFragment)
 
     fun textFragment(position: Int): TextFragment? = (fragments[position] as? TextFragment)

app/src/main/kotlin/com/simplemobiletools/notes/pro/fragments/ChecklistFragment.kt

@@ -25,7 +25,6 @@ import kotlinx.android.synthetic.main.fragment_checklist.view.*
 class ChecklistFragment : NoteFragment(), ChecklistItemsListener {
 
     private var noteId = 0L
-    private var note: Note? = null
 
     lateinit var view: ViewGroup
 

app/src/main/kotlin/com/simplemobiletools/notes/pro/fragments/NoteFragment.kt

@@ -7,6 +7,7 @@ import com.simplemobiletools.commons.dialogs.SecurityDialog
 import com.simplemobiletools.commons.extensions.applyColorFilter
 import com.simplemobiletools.commons.extensions.beVisibleIf
 import com.simplemobiletools.commons.extensions.getAdjustedPrimaryColor
+import com.simplemobiletools.commons.helpers.PROTECTION_NONE
 import com.simplemobiletools.notes.pro.extensions.config
 import com.simplemobiletools.notes.pro.extensions.getPercentageFontSize
 import com.simplemobiletools.notes.pro.models.Note
@@ -14,6 +15,7 @@ import kotlinx.android.synthetic.main.fragment_checklist.view.*
 
 abstract class NoteFragment : Fragment() {
     protected var shouldShowLockedContent = false
+    protected var note: Note? = null
 
     protected fun setupLockedViews(view: ViewGroup, note: Note) {
         view.apply {
@@ -26,12 +28,22 @@ abstract class NoteFragment : Fragment() {
             note_locked_show.setTextColor(context!!.getAdjustedPrimaryColor())
             note_locked_show.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getPercentageFontSize())
             note_locked_show.setOnClickListener {
-                SecurityDialog(activity!!, note.protectionHash, note.protectionType) { hash, type, success ->
-                    if (success) {
-                        shouldShowLockedContent = true
-                        checkLockState()
-                    }
-                }
+                handleUnlocking()
+            }
+        }
+    }
+
+    fun handleUnlocking(callback: (() -> Unit)? = null) {
+        if (callback != null && (note!!.protectionType == PROTECTION_NONE || shouldShowLockedContent)) {
+            callback()
+            return
+        }
+
+        SecurityDialog(activity!!, note!!.protectionHash, note!!.protectionType) { hash, type, success ->
+            if (success) {
+                shouldShowLockedContent = true
+                checkLockState()
+                callback?.invoke()
             }
         }
     }

app/src/main/kotlin/com/simplemobiletools/notes/pro/fragments/TextFragment.kt

@@ -38,7 +38,6 @@ class TextFragment : NoteFragment() {
     private var isUndoOrRedo = false
     private var skipTextUpdating = false
     private var noteId = 0L
-    private var note: Note? = null
 
     lateinit var view: ViewGroup