add a cab button for editing checklist items

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

@@ -28,7 +28,7 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
         initDrawables()
     }
 
-    override fun getActionMenuId() = R.menu.cab_delete_only
+    override fun getActionMenuId() = R.menu.cab_checklist
 
     override fun actionItemPressed(id: Int) {
         if (selectedKeys.isEmpty()) {
@@ -36,6 +36,7 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
         }
 
         when (id) {
+            R.id.cab_edit -> editNote()
             R.id.cab_delete -> deleteSelection()
         }
     }
@@ -48,7 +49,14 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
 
     override fun getItemKeyPosition(key: Int) = items.indexOfFirst { it.id == key }
 
-    override fun prepareActionMode(menu: Menu) {}
+    override fun prepareActionMode(menu: Menu) {
+        val selectedItems = getSelectedItems()
+        if (selectedItems.isEmpty()) {
+            return
+        }
+
+        menu.findItem(R.id.cab_edit).isVisible = isOneItemSelected()
+    }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = createViewHolder(R.layout.item_checklist, parent)
 
@@ -68,6 +76,10 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
         checkDrawable = res.getColoredDrawableWithColor(R.drawable.ic_check_big, res.getColor(R.color.md_green_700))
     }
 
+    private fun editNote() {
+
+    }
+
     private fun deleteSelection() {
         val removeItems = ArrayList<ChecklistItem>(selectedKeys.size)
         val positions = ArrayList<Int>()
@@ -96,6 +108,8 @@ class ChecklistAdapter(activity: BaseSimpleActivity, var items: ArrayList<Checkl
 
     private fun getItemWithKey(key: Int): ChecklistItem? = items.firstOrNull { it.id == key }
 
+    private fun getSelectedItems() = items.filter { selectedKeys.contains(it.id) } as ArrayList<ChecklistItem>
+
     private fun setupView(view: View, checklistItem: ChecklistItem) {
         val isSelected = selectedKeys.contains(checklistItem.id)
         view.apply {

app/src/main/res/menu/cab_checklist.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/cab_edit"
+        android:icon="@drawable/ic_edit"
+        android:title="@string/rename"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_delete"
+        android:icon="@drawable/ic_delete"
+        android:title="@string/delete"
+        app:showAsAction="ifRoom"/>
+</menu>