Leave a toolbar's filled button its own colours

M3's colour list for a standard toolbar ends "Standard button
(Primary)" and the vibrant list ends "Standard button (On primary
container)" (N-13) — both name the *standard* button. The two rules
painted every icon button in the toolbar instead, so a button that
brings its own container got a primary label on a primary fill and its
icon disappeared: SealShare's floating navigation marks the current page
with a filled button, and that button came out a blank circle.

A button that fills its own container is now left alone — filled, tonal,
or either of them selected — and keeps the label colour that goes with
the fill. A disabled button still falls back to button.css's disabled
ink in a toolbar of either colour, as before. AppBarTest pins the
exclusion on both rules.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

resources/css/components/toolbar.css

@@ -72,7 +72,7 @@
         color: var(--md-sys-color-on-primary-container);
     }
 
-    [data-md-toolbar][data-md-vibrant] [data-md-icon-button]:not([aria-pressed='true'], :disabled, [aria-disabled='true']) {
+    [data-md-toolbar][data-md-vibrant] [data-md-icon-button]:not([data-md-variant='filled'], [data-md-variant='tonal'], [data-md-selected='true'], [aria-pressed='true'], :disabled, [aria-disabled='true']) {
         color: var(--md-sys-color-on-primary-container);
     }
 
@@ -82,9 +82,13 @@
     }
 
     /* M3's colour list for a standard toolbar ends "Standard button (Primary)", as the vibrant list
-       ends "Standard button (On primary container)" — the row above (N-13). A disabled button keeps
+       ends "Standard button (On primary container)" — the row above (N-13). Both rows name the
-       button.css's disabled colours in either. */
+       *standard* button, so a button that fills its own container is left alone: it carries the
-    [data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]:not([aria-pressed='true'], :disabled, [aria-disabled='true']) {
+       matching label colour (`filled` on-primary, `tonal` on-tone, either selected), and painting
+       that label primary put a primary icon on a primary fill — the current page's button in a
+       navigation toolbar came out a blank circle. A disabled button keeps button.css's disabled
+       colours in either. */
+    [data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]:not([data-md-variant='filled'], [data-md-variant='tonal'], [data-md-selected='true'], [aria-pressed='true'], :disabled, [aria-disabled='true']) {
         color: var(--md-sys-color-primary);
     }
 

tests/Feature/Components/AppBarTest.php

@@ -212,9 +212,19 @@ it('keeps a toolbar at the bottom clear of the navigation bar', function () {
         ->and($css->declarations('[data-md-toolbar][data-md-vertical][data-md-toolbar-place=\'end\'], [data-md-toolbar-group][data-md-vertical][data-md-toolbar-place=\'end\']'))
         ->toBe(['inset-inline-end' => 'calc(var(--md-sys-measurement-space300) + var(--material-safe-right, env(safe-area-inset-right)))'])
         // A standard toolbar's standard buttons are primary (N-13).
-        ->and($css->declarations('[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]:not([aria-pressed=\'true\'], :disabled, [aria-disabled=\'true\'])'))
+        ->and($css->declarations('[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]:not([data-md-variant=\'filled\'], [data-md-variant=\'tonal\'], [data-md-selected=\'true\'], [aria-pressed=\'true\'], :disabled, [aria-disabled=\'true\'])'))
         ->toBe(['color' => 'var(--md-sys-color-primary)']);
 
+    // N-13 names the *standard* button, so a button that fills its own container keeps the label
+    // colour that goes with that fill: a filled button painted primary put a primary icon on a
+    // primary fill, and the current page's button in a navigation toolbar came out a blank circle.
+    foreach (['[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]', '[data-md-toolbar][data-md-vibrant] [data-md-icon-button]'] as $scope) {
+        preg_match_all('/'.preg_quote($scope, '/').':not\([^{]*\{[^}]*\bcolor:/', $css->css, $rules);
+
+        expect($rules[0])->not->toBeEmpty()
+            ->each->toContain("[data-md-variant='filled']", "[data-md-variant='tonal']", "[data-md-selected='true']");
+    }
+
     // A disabled icon button keeps button.css's disabled ink in a toolbar of either colour.
     foreach (['[data-md-toolbar]:not([data-md-vibrant]) [data-md-icon-button]', '[data-md-toolbar][data-md-vibrant] [data-md-icon-button]'] as $scope) {
         preg_match_all('/'.preg_quote($scope, '/').'[^{]*\{[^}]*\bcolor:/', $css->css, $rules);