ui: use colorOnSurface

Use colorOnSurface for the first time ever. I decided to pick a color
that was as non-intrusive as possible that was still differentiateable,
and I think it looks like a net improvement. It will probably be
tweaked a bit in the future as I expand it to other elevated views.

app/src/main/java/org/oxycblt/auxio/MainActivity.kt

@@ -33,7 +33,6 @@ import org.oxycblt.auxio.databinding.ActivityMainBinding
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.playback.system.PlaybackService
 import org.oxycblt.auxio.settings.SettingsManager
-import org.oxycblt.auxio.util.applyEdge
 import org.oxycblt.auxio.util.isNight
 import org.oxycblt.auxio.util.logD
 
@@ -54,12 +53,6 @@ class MainActivity : AppCompatActivity() {
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
             applyEdgeToEdgeWindow(binding)
-
-            // If there are left/right insets [signalling that we are in phone landscape mode],
-            // we will always apply them.
-            binding.applyEdge { bars ->
-                binding.root.updatePadding(left = bars.left, right = bars.right)
-            }
         } else {
             binding.root.fitsSystemWindows = true
         }
@@ -126,15 +119,35 @@ class MainActivity : AppCompatActivity() {
                         WindowInsets.Type.systemBars(),
                         insets.getInsetsIgnoringVisibility(WindowInsets.Type.systemBars())
                     )
-                    .build()
+                    .build().also {
+                        val bars = it.getInsets(WindowInsets.Type.systemBars())
+
+                        // If left/right insets are present [implying phone landscape mode],
+                        // make sure that we apply them.
+                        binding.root.updatePadding(
+                            left = bars.left,
+                            right = bars.right
+                        )
+                    }
             }
         } else {
             // Do old edge-to-edge otherwise.
             logD("Doing legacy edge-to-edge.")
 
             @Suppress("DEPRECATION")
-            binding.root.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
-                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+            binding.root.apply {
+                systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION or
+                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+
+                setOnApplyWindowInsetsListener { v, insets ->
+                    updatePadding(
+                        left = insets.systemWindowInsetLeft,
+                        right = insets.systemWindowInsetRight
+                    )
+
+                    insets
+                }
+            }
         }
     }
 

app/src/main/res/layout/fragment_home.xml

@@ -21,7 +21,7 @@
             android:elevation="@dimen/elevation_normal"
             android:focusable="true">
 
-            <androidx.appcompat.widget.Toolbar
+            <com.google.android.material.appbar.MaterialToolbar
                 android:id="@+id/home_toolbar"
                 style="@style/Widget.Toolbar"
                 app:layout_scrollFlags="scroll|enterAlways"

app/src/main/res/layout/fragment_search.xml

@@ -39,7 +39,7 @@
                     android:id="@+id/search_edit_text"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                    android:background="?attr/colorSurface"
+                    android:background="@android:color/transparent"
                     android:hint="@string/hint_search_library"
                     android:imeOptions="actionSearch|flagNoExtractUi"
                     android:inputType="textFilter"

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

@@ -1,9 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <!--
+    Sometimes we need to use the surface colors for modes that aren't the current one.
+    Colors are kept here just in case
+    -->
     <color name="surface_day">#fffafafa</color>
-    <color name="surface_night">#ff151515</color>
+    <color name="surface_night">#ff121212</color>
     <color name="surface_black">#ff000000</color>
 
+    <!--
+    By default, colorOnSurface when applied sticks out like a sore thumb, so we
+    darken it a little so it lines up with our dark mode backgrounds.
+    Yes, this is a flagrant violation of material, but they also say that #121212 is
+    the recommended black dark color so they have no right to an opinion here.
+    -->
+    <color name="on_surface">#606060</color>
+    <color name="on_surface_black">#CDCDCD</color>
+
+    <!--
+    Typical UI colors.
+    -->
     <color name="surface">@color/surface_day</color>
     <color name="selection">#cbcbcb</color>
     <color name="control">#202020</color>

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

@@ -9,13 +9,10 @@
 
     <!-- Base theme -->
     <style name="Theme.Base" parent="Theme.Splash">
-        <!-- TODO: Improve the color contrast on the dark theme [colorOnSurface] -->
-        <!-- TODO: Migrate to liftOnScroll everywhere that is not HomeFragment -->
-
         <!-- Colors -->
         <item name="colorSurface">@color/surface</item>
         <item name="colorAccent">@color/design_default_color_primary</item>
-        <item name="colorOnSurface">#00000000</item>
+        <item name="colorOnSurface">@color/on_surface</item>
 
         <item name="colorPrimary">?attr/colorAccent</item>
         <item name="colorSecondary">?attr/colorAccent</item>
@@ -50,6 +47,7 @@
     <!-- The basic black theme derived in all black accents. -->
     <style name="Theme.Base.Black" parent="Theme.Base">
         <item name="colorSurface">@color/surface_black</item>
+        <item name="colorOnSurface">@color/on_surface_black</item>
         <item name="materialAlertDialogTheme">@style/Theme.CustomDialog.Black</item>
     </style>