Added superuser screen implementation

* partially

app/src/main/java/com/topjohnwu/magisk/redesign/compat/CompatActivity.kt

@@ -2,8 +2,11 @@ package com.topjohnwu.magisk.redesign.compat
 
 import android.os.Bundle
 import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.OnRebindCallback
 import androidx.databinding.ViewDataBinding
 import androidx.fragment.app.Fragment
+import androidx.transition.TransitionManager
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.base.BaseActivity
 import com.topjohnwu.magisk.model.events.ViewEvent
@@ -27,6 +30,13 @@ abstract class CompatActivity<ViewModel : CompatViewModel, Binding : ViewDataBin
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        binding.addOnRebindCallback(object : OnRebindCallback<Binding>() {
+            override fun onPreBind(binding: Binding): Boolean {
+                TransitionManager.beginDelayedTransition(binding.root as ViewGroup)
+                return super.onPreBind(binding)
+            }
+        })
+
         delegate.onCreate()
         navigation?.onCreate(savedInstanceState)
     }

app/src/main/java/com/topjohnwu/magisk/redesign/compat/CompatFragment.kt

@@ -2,7 +2,10 @@ package com.topjohnwu.magisk.redesign.compat
 
 import android.os.Bundle
 import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.OnRebindCallback
 import androidx.databinding.ViewDataBinding
+import androidx.transition.TransitionManager
 import com.topjohnwu.magisk.base.BaseFragment
 import com.topjohnwu.magisk.model.events.ViewEvent
 
@@ -19,6 +22,13 @@ abstract class CompatFragment<ViewModel : CompatViewModel, Binding : ViewDataBin
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
+        binding.addOnRebindCallback(object : OnRebindCallback<Binding>() {
+            override fun onPreBind(binding: Binding): Boolean {
+                TransitionManager.beginDelayedTransition(binding.root as ViewGroup)
+                return super.onPreBind(binding)
+            }
+        })
+
         delegate.onCreate()
     }
 

app/src/main/java/com/topjohnwu/magisk/redesign/superuser/SuperuserViewModel.kt

@@ -1,10 +1,55 @@
 package com.topjohnwu.magisk.redesign.superuser
 
+import android.content.pm.PackageManager
+import com.topjohnwu.magisk.BR
+import com.topjohnwu.magisk.data.database.PolicyDao
+import com.topjohnwu.magisk.databinding.ComparableRvItem
+import com.topjohnwu.magisk.extensions.applySchedulers
+import com.topjohnwu.magisk.extensions.subscribeK
+import com.topjohnwu.magisk.model.entity.recycler.PolicyRvItem
 import com.topjohnwu.magisk.model.navigation.Navigation
 import com.topjohnwu.magisk.redesign.compat.CompatViewModel
+import com.topjohnwu.magisk.redesign.home.itemBindingOf
+import com.topjohnwu.magisk.utils.DiffObservableList
 
-class SuperuserViewModel : CompatViewModel() {
+class SuperuserViewModel(
+    private val db: PolicyDao,
+    private val packageManager: PackageManager
+) : CompatViewModel() {
+
+    val items = diffListOf<PolicyRvItem>()
+    val itemBinding = itemBindingOf<PolicyRvItem> {
+        it.bindExtra(BR.viewModel, this)
+    }
+
+    override fun refresh() = db.fetchAll()
+        .flattenAsFlowable { it }
+        .parallel()
+        .map { PolicyRvItem(it, it.applicationInfo.loadIcon(packageManager)) }
+        .sequential()
+        .sorted { o1, o2 ->
+            compareBy<PolicyRvItem>(
+                { it.item.appName.toLowerCase() },
+                { it.item.packageName }
+            ).compare(o1, o2)
+        }
+        .toList()
+        .map { it to items.calculateDiff(it) }
+        .applySchedulers()
+        .applyViewModel(this)
+        .subscribeK { items.update(it.first, it.second) }
 
     fun hidePressed() = Navigation.hide().publish()
 
-}
+    fun deletePressed(item: PolicyRvItem) {
+        TODO()
+    }
+
+}
+
+inline fun <T : ComparableRvItem<T>> diffListOf(
+    vararg newItems: T
+) = DiffObservableList(object : DiffObservableList.Callback<T> {
+    override fun areItemsTheSame(oldItem: T, newItem: T) = oldItem.genericItemSameAs(newItem)
+    override fun areContentsTheSame(oldItem: T, newItem: T) = oldItem.genericContentSameAs(newItem)
+}).also { it.update(newItems.toList()) }