Fix #329. Add confirmation before removing favorite manga on multiple selection. Add new proguard rules

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryFragment.kt

@@ -313,13 +313,8 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
                 changeSelectedCover(presenter.selectedMangas)
                 destroyActionModeIfNeeded()
             }
-            R.id.action_move_to_category -> {
-                moveMangasToCategories(presenter.selectedMangas)
-            }
-            R.id.action_delete -> {
-                presenter.deleteMangas()
-                destroyActionModeIfNeeded()
-            }
+            R.id.action_move_to_category -> moveMangasToCategories(presenter.selectedMangas)
+            R.id.action_delete -> showDeleteMangaDialog()
             else -> return false
         }
         return true
@@ -409,6 +404,18 @@ class LibraryFragment : BaseRxFragment<LibraryPresenter>(), ActionMode.Callback
                 .show()
     }
 
+    private fun showDeleteMangaDialog() {
+        MaterialDialog.Builder(activity)
+                .content(R.string.confirm_delete_manga)
+                .positiveText(android.R.string.yes)
+                .negativeText(android.R.string.no)
+                .onPositive { dialog, action ->
+                    presenter.removeMangaFromLibrary()
+                    destroyActionModeIfNeeded()
+                }
+                .show()
+    }
+
     /**
      * Creates the action mode if it's not created already.
      */

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -236,7 +236,7 @@ class LibraryPresenter : BasePresenter<LibraryFragment>() {
     /**
      * Remove the selected manga from the library.
      */
-    fun deleteMangas() {
+    fun removeMangaFromLibrary() {
         // Create a set of the list
         val mangaToDelete = selectedMangas.toSet()