Fix bug: not setting current file position when closing others tabs (#543)

Author: Deenu488

app/build.gradle.kts

@@ -196,7 +196,7 @@ dependencies {
     implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.0-alpha03")
     implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.8.0-alpha03")
     implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.2.0-alpha01")
-    implementation("androidx.viewpager2:viewpager2:1.1.0-beta02")
+    implementation("androidx.viewpager2:viewpager2:1.1.0-rc01")
     implementation("androidx.activity:activity-ktx:1.9.0-beta01")
     implementation("androidx.startup:startup-runtime:1.2.0-alpha02")
 

app/src/main/kotlin/org/cosmicide/fragment/EditorFragment.kt

@@ -145,7 +145,7 @@ class EditorFragment : BaseBindingFragment<FragmentEditorBinding>() {
             }
         })
 
-        TabLayoutMediator(binding.tabLayout, binding.pager) { tab, position ->
+        TabLayoutMediator(binding.tabLayout, binding.pager, true, false) { tab, position ->
             tab.text = fileViewModel.files.value!![position].name
             tab.view.setOnLongClickListener {
                 Log.d("EditorFragment", "onLongClick: $position")
@@ -617,7 +617,7 @@ class EditorFragment : BaseBindingFragment<FragmentEditorBinding>() {
                 R.id.close_all_tab -> fileViewModel.removeAll()
                 R.id.close_left_tab -> fileViewModel.removeLeft(pos - 1)
                 R.id.close_right_tab -> fileViewModel.removeRight(pos + 1)
-                R.id.close_other_tab -> fileViewModel.removeOthers(fileViewModel.files.value!![pos])
+                R.id.close_other_tab -> fileViewModel.removeOthers(fileViewModel.files.value!![position])
             }
             true
         }

app/src/main/kotlin/org/cosmicide/model/FileViewModel.kt

@@ -70,10 +70,12 @@ class FileViewModel : ViewModel() {
      * Removes all files from the list except for the given file, and sets the current position to 0.
      */
     fun removeOthers(file: File) {
-        files.value = mutableListOf(file)
-        setCurrentPosition(0)
+        if (files.value!!.size > 1) {
+            files.value = mutableListOf(file)
+            setCurrentPosition(0)
+        }
     }
-
+    
     /**
      * Removes all files from the list.
      * Sets the current position to -1 to indicate that there is no current file.
@@ -113,4 +115,4 @@ class FileViewModel : ViewModel() {
         files.value =
             (files.value.orEmpty() + newFiles).distinctBy { it.absolutePath }.toMutableList()
     }
-}
+}