Add Dividers to ControllerActivity's RecyclerView

Dividers after titles were missing in `ControllerActivity` which made it look inconsistent with `SettingsActivity` which did have them. They have now been added by extending `DividerItemDecoration` to be drawn before any `ControllerHeaderItem`.

.idea/misc.xml

@@ -3,7 +3,17 @@
   <component name="DesignSurface">
     <option name="filePathToZoomLevelMap">
       <map>
+        <entry key="../../../../../layout/custom_preview.xml" value="0.16875" />
+        <entry key="app/src/main/res/drawable/logo_skyline.xml" value="0.152" />
+        <entry key="app/src/main/res/layout/app_dialog.xml" value="0.22335526315789472" />
+        <entry key="app/src/main/res/layout/button_dialog.xml" value="0.33" />
+        <entry key="app/src/main/res/layout/controller_activity.xml" value="0.22335526315789472" />
+        <entry key="app/src/main/res/layout/controller_header.xml" value="0.22335526315789472" />
+        <entry key="app/src/main/res/layout/header_rom_filter.xml" value="0.22335526315789472" />
+        <entry key="app/src/main/res/layout/license_dialog.xml" value="0.1" />
         <entry key="app/src/main/res/layout/main_activity.xml" value="0.2028688524590164" />
+        <entry key="app/src/main/res/layout/on_screen_edit_activity.xml" value="0.67" />
+        <entry key="app/src/main/res/layout/on_screen_edit_mini_fab.xml" value="0.22335526315789472" />
         <entry key="app/src/main/res/layout/settings_activity.xml" value="0.22302631578947368" />
         <entry key="app/src/main/res/menu/toolbar_log.xml" value="0.11019736842105263" />
       </map>

app/src/main/java/emu/skyline/adapter/GenericAdapter.kt

@@ -52,6 +52,8 @@ class GenericAdapter : RecyclerView.Adapter<GenericViewHolder<ViewBinding>>(), F
 
     override fun getItemCount() = currentItems.size
 
+    fun getFactoryViewType(factory : ViewBindingFactory) = viewTypesMapping.get(factory)
+
     override fun getItemViewType(position : Int) = viewTypesMapping.getOrPut(currentItems[position].getViewBindingFactory()) { viewTypesMapping.size }
 
     fun setHeaderItems(items : List<GenericListItem<*>>) {

app/src/main/java/emu/skyline/input/ControllerActivity.kt

@@ -6,9 +6,12 @@
 package emu.skyline.input
 
 import android.content.Intent
+import android.graphics.Canvas
 import android.os.Bundle
 import android.view.KeyEvent
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.marginTop
+import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
@@ -187,6 +190,24 @@ class ControllerActivity : AppCompatActivity() {
             }
         })
 
+        val dividerItemDecoration = object : DividerItemDecoration(this, DividerItemDecoration.VERTICAL) {
+            override fun onDraw(canvas : Canvas, parent : RecyclerView, state : RecyclerView.State) {
+                val divider = drawable!!
+                for (i in 0 until parent.childCount) {
+                    val view = parent.getChildAt(i)
+                    if (parent.adapter!!.getItemViewType(parent.getChildAdapterPosition(view)) == adapter.getFactoryViewType(ControllerHeaderBindingFactory)) {
+                        val bottom = view.top - view.marginTop
+                        val top = bottom - divider.intrinsicHeight
+                        divider.setBounds(0, top, parent.width, bottom)
+                        divider.draw(canvas)
+                    }
+                }
+            }
+        }
+
+        dividerItemDecoration.drawable.let { it?.setTint(getColor(R.color.dividerColor)); it }
+        binding.controllerList.addItemDecoration(dividerItemDecoration)
+
         update()
     }
 

app/src/main/res/values-night/colors.xml

@@ -3,4 +3,5 @@
     <color name="colorPrimary">#FF4285F4</color>
     <color name="backgroundColor">#FF121212</color>
     <color name="backgroundColorVariant">#323232</color>
+    <color name="dividerColor">@android:color/white</color>
 </resources>

app/src/main/res/values/colors.xml

@@ -4,4 +4,5 @@
     <color name="colorPrimary">#FF1E58F0</color>
     <color name="backgroundColor">@android:color/white</color>
     <color name="backgroundColorVariant">#F8F8F8</color>
+    <color name="dividerColor">@android:color/black</color>
 </resources>