[M3][Color] Expose attr contrastColorThemeOverlay

PiperOrigin-RevId: 546792664

Author: Material Design Team

lib/java/com/google/android/material/color/DynamicColors.java

@@ -53,6 +53,9 @@ public class DynamicColors {
   private static final int[] DYNAMIC_COLOR_THEME_OVERLAY_ATTRIBUTE =
       new int[] {R.attr.dynamicColorThemeOverlay};
 
+  private static final int[] CONTRAST_COLOR_THEME_OVERLAY_ATTRIBUTE =
+      new int[] {R.attr.contrastColorThemeOverlay};
+
   @RequiresApi(api = VERSION_CODES.S)
   private static final int[] SYSTEM_NEUTRAL_PALETTE_RES_IDS =
       new int[] {
@@ -457,13 +460,13 @@ public static boolean isDynamicColorAvailable() {
   private static int getDefaultThemeOverlay(@NonNull Context context) {
     // TODO(b/289112889): Remove workaround and roll forward cl/528599594 as soon as U public
     // release.
-    if (isDynamicContrastAvailable(context)) {
-      return R.style.ThemeOverlay_Material3_DynamicColors_Contrast_DayNight;
-    }
-    TypedArray dynamicColorAttributes =
-        context.obtainStyledAttributes(DYNAMIC_COLOR_THEME_OVERLAY_ATTRIBUTE);
-    final int theme = dynamicColorAttributes.getResourceId(0, 0);
-    dynamicColorAttributes.recycle();
+    int[] themeOverlayAttribute =
+        isDynamicContrastAvailable(context)
+            ? CONTRAST_COLOR_THEME_OVERLAY_ATTRIBUTE
+            : DYNAMIC_COLOR_THEME_OVERLAY_ATTRIBUTE;
+    TypedArray colorAttributes = context.obtainStyledAttributes(themeOverlayAttribute);
+    final int theme = colorAttributes.getResourceId(0, 0);
+    colorAttributes.recycle();
     return theme;
   }
 

lib/java/com/google/android/material/color/res/values/attrs.xml

@@ -172,6 +172,10 @@
   <!-- TODO(b/272585197) Remove after tonal surface migration is complete. -->
   <attr name="preUDynamicNeutralChromaUpdateEnabled" format="boolean"/>
 
+  <!-- The temporary contrast color theme overlay to use when applying contrast colors. -->
+  <!-- TODO(b/289112889): Remove workaround and roll forward cl/528599594 as soon as U public release. -->
+  <attr name="contrastColorThemeOverlay" format="reference"/>
+
   <!-- Deprecated. -->
 
   <!-- A tonal variation of the primary color. -->

lib/java/com/google/android/material/dialog/res/values/themes_base.xml

@@ -278,6 +278,7 @@
 
     <!-- Theme overlays. -->
     <item name="dynamicColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Light</item>
+    <item name="contrastColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Contrast.Light</item>
   </style>
 
   <style name="Base.V14.Theme.Material3.Dark.Dialog" parent="Theme.MaterialComponents.Dialog">
@@ -539,6 +540,7 @@
 
     <!-- Theme overlays. -->
     <item name="dynamicColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Dark</item>
+    <item name="contrastColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Contrast.Dark</item>
   </style>
 
   <style name="Base.Theme.Material3.Light.Dialog" parent="Base.V14.Theme.Material3.Light.Dialog"/>

lib/java/com/google/android/material/theme/res/values-night/themes_overlay.xml

@@ -17,5 +17,4 @@
 <resources>
   <style name="ThemeOverlay.Material3.DynamicColors.DayNight" parent="ThemeOverlay.Material3.DynamicColors.Dark" />
 
-  <style name="ThemeOverlay.Material3.DynamicColors.Contrast.DayNight" parent="ThemeOverlay.Material3.DynamicColors.Contrast.Dark" />
 </resources>

lib/java/com/google/android/material/theme/res/values/themes_base.xml

@@ -281,6 +281,7 @@
 
     <!-- Theme overlays. -->
     <item name="dynamicColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Light</item>
+    <item name="contrastColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Contrast.Light</item>
   </style>
 
   <style name="Base.V14.Theme.Material3.Dark" parent="Theme.MaterialComponents">
@@ -545,6 +546,7 @@
 
     <!-- Theme overlays. -->
     <item name="dynamicColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Dark</item>
+    <item name="contrastColorThemeOverlay">@style/ThemeOverlay.Material3.DynamicColors.Contrast.Dark</item>
   </style>
 
   <style name="Base.Theme.Material3.Light" parent="Base.V14.Theme.Material3.Light"/>

lib/java/com/google/android/material/theme/res/values/themes_overlay.xml

@@ -286,6 +286,4 @@
     <item name="android:textColorHighlightInverse">@color/m3_dynamic_contrast_highlighted_text</item>
   </style>
 
-  <style name="ThemeOverlay.Material3.DynamicColors.Contrast.DayNight" parent="ThemeOverlay.Material3.DynamicColors.Contrast.Light" />
-
 </resources>