[8.x] Blade component slot attributes

src/Illuminate/View/Compilers/ComponentTagCompiler.php

@@ -395,14 +395,53 @@ protected function compileClosingTags(string $value)
      */
     public function compileSlots(string $value)
     {
-        $value = preg_replace_callback('/<\s*x[\-\:]slot\s+(:?)name=(?<name>(\"[^\"]+\"|\\\'[^\\\']+\\\'|[^\s>]+))\s*>/', function ($matches) {
+        $pattern = "/
+            <
+                \s*
+                x[\-\:]slot
+                \s+
+                (:?)name=(?<name>(\"[^\"]+\"|\\\'[^\\\']+\\\'|[^\s>]+))
+                (?<attributes>
+                    (?:
+                        \s+
+                        (?:
+                            (?:
+                                \{\{\s*\\\$attributes(?:[^}]+?)?\s*\}\}
+                            )
+                            |
+                            (?:
+                                [\w\-:.@]+
+                                (
+                                    =
+                                    (?:
+                                        \\\"[^\\\"]*\\\"
+                                        |
+                                        \'[^\']*\'
+                                        |
+                                        [^\'\\\"=<>]+
+                                    )
+                                )?
+                            )
+                        )
+                    )*
+                    \s*
+                )
+                (?<![\/=\-])
+            >
+        /x";
+
+        $value = preg_replace_callback($pattern, function ($matches) {
             $name = $this->stripQuotes($matches['name']);
 
             if ($matches[1] !== ':') {
                 $name = "'{$name}'";
             }
 
-            return " @slot({$name}) ";
+            $this->boundAttributes = [];
+
+            $attributes = $this->getAttributesFromAttributeString($matches['attributes']);
+
+            return " @slot({$name}, null, [".$this->attributesToString($attributes, $escapeBound = false).']) ';
         }, $value);
 
         return preg_replace('/<\/\s*x[\-\:]slot[^>]*>/', ' @endslot', $value);

src/Illuminate/View/ComponentSlot.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace Illuminate\View;
+
+use Illuminate\Contracts\Support\Htmlable;
+
+class ComponentSlot implements Htmlable
+{
+    /**
+     * The slot attribute bag.
+     *
+     * @var \Illuminate\View\ComponentAttributeBag
+     */
+    public $attributes;
+
+    /**
+     * The slot contents.
+     *
+     * @var string
+     */
+    protected $contents;
+
+    /**
+     * Create a new slot instance.
+     *
+     * @param  string  $contents
+     * @param  array  $attributes
+     * @return void
+     */
+    public function __construct($contents = '', $attributes = [])
+    {
+        $this->contents = $contents;
+        $this->withAttributes($attributes);
+    }
+
+    /**
+     * Get the HTML string.
+     *
+     * @return string
+     */
+    public function toHtml()
+    {
+        return $this->contents;
+    }
+
+    /**
+     * Determine if the given slot is empty.
+     *
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return $this->contents === '';
+    }
+
+    /**
+     * Determine if the given slot is not empty.
+     *
+     * @return bool
+     */
+    public function isNotEmpty()
+    {
+        return ! $this->isEmpty();
+    }
+
+    /**
+     * Set the extra attributes that the slot should make available.
+     *
+     * @param  array  $attributes
+     * @return $this
+     */
+    public function withAttributes(array $attributes)
+    {
+        $this->attributes = new ComponentAttributeBag($attributes);
+
+        return $this;
+    }
+
+    /**
+     * Get the HTML string.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->toHtml();
+    }
+}

src/Illuminate/View/Concerns/ManagesComponents.php

@@ -6,7 +6,7 @@
 use Illuminate\Contracts\View\View;
 use Illuminate\Support\Arr;
 use Illuminate\Support\HtmlString;
-use InvalidArgumentException;
+use Illuminate\View\ComponentSlot;
 
 trait ManagesComponents
 {
@@ -119,21 +119,18 @@ protected function componentData()
      * Start the slot rendering process.
      *
      * @param  string  $name
+     * @param  array  $attributes
      * @param  string|null  $content
      * @return void
-     *
-     * @throws \InvalidArgumentException
      */
-    public function slot($name, $content = null)
+    public function slot($name, $content = null, $attributes = [])
     {
-        if (func_num_args() > 2) {
-            throw new InvalidArgumentException('You passed too many arguments to the ['.$name.'] slot.');
-        } elseif (func_num_args() === 2) {
+        if ($content) {
             $this->slots[$this->currentComponent()][$name] = $content;
         } elseif (ob_start()) {
             $this->slots[$this->currentComponent()][$name] = '';
 
-            $this->slotStack[$this->currentComponent()][] = $name;
+            $this->slotStack[$this->currentComponent()][] = [$name, $attributes];
         }
     }
 
@@ -150,7 +147,9 @@ public function endSlot()
             $this->slotStack[$this->currentComponent()]
         );
 
-        $this->slots[$this->currentComponent()][$currentSlot] = new HtmlString(trim(ob_get_clean()));
+        [$currentSlotName, $currentSlotAttributes] = $currentSlot;
+
+        $this->slots[$this->currentComponent()][$currentSlotName] = new ComponentSlot(trim(ob_get_clean()), $currentSlotAttributes);
     }
 
     /**

src/Illuminate/View/DynamicComponent.php

@@ -120,7 +120,7 @@ protected function compileBindings(array $bindings)
     protected function compileSlots(array $slots)
     {
         return collect($slots)->map(function ($slot, $name) {
-            return $name === '__default' ? null : '<x-slot name="'.$name.'">{{ $'.$name.' }}</x-slot>';
+            return $name === '__default' ? null : '<x-slot name="'.$name.'" '.((string) $slot->attributes).'>{{ $'.$name.' }}</x-slot>';
         })->filter()->implode(PHP_EOL);
     }
 

tests/View/Blade/BladeComponentTagCompilerTest.php

@@ -23,15 +23,31 @@ public function testSlotsCanBeCompiled()
         $result = $this->compiler()->compileSlots('<x-slot name="foo">
 </x-slot>');
 
-        $this->assertSame("@slot('foo') \n".' @endslot', trim($result));
+        $this->assertSame("@slot('foo', null, []) \n".' @endslot', trim($result));
     }
 
     public function testDynamicSlotsCanBeCompiled()
     {
         $result = $this->compiler()->compileSlots('<x-slot :name="$foo">
 </x-slot>');
 
-        $this->assertSame("@slot(\$foo) \n".' @endslot', trim($result));
+        $this->assertSame("@slot(\$foo, null, []) \n".' @endslot', trim($result));
+    }
+
+    public function testSlotsWithAttributesCanBeCompiled()
+    {
+        $result = $this->compiler()->compileSlots('<x-slot name="foo" class="font-bold">
+</x-slot>');
+
+        $this->assertSame("@slot('foo', null, ['class' => 'font-bold']) \n".' @endslot', trim($result));
+    }
+
+    public function testSlotsWithDynamicAttributesCanBeCompiled()
+    {
+        $result = $this->compiler()->compileSlots('<x-slot name="foo" :class="$classes">
+</x-slot>');
+
+        $this->assertSame("@slot('foo', null, ['class' => \$classes]) \n".' @endslot', trim($result));
     }
 
     public function testBasicComponentParsing()

tests/View/Blade/BladeComponentsTest.php

@@ -44,7 +44,7 @@ public function testEndComponentClassesAreCompiled()
 
     public function testSlotsAreCompiled()
     {
-        $this->assertSame('<?php $__env->slot(\'foo\', ["foo" => "bar"]); ?>', $this->compiler->compileString('@slot(\'foo\', ["foo" => "bar"])'));
+        $this->assertSame('<?php $__env->slot(\'foo\', null, ["foo" => "bar"]); ?>', $this->compiler->compileString('@slot(\'foo\', null, ["foo" => "bar"])'));
         $this->assertSame('<?php $__env->slot(\'foo\'); ?>', $this->compiler->compileString('@slot(\'foo\')'));
     }
 

tests/View/ViewFactoryTest.php

@@ -355,7 +355,7 @@ public function testComponentHandling()
         $factory->getDispatcher()->shouldReceive('dispatch');
         $factory->startComponent('component', ['name' => 'Taylor']);
         $factory->slot('title');
-        $factory->slot('website', 'laravel.com');
+        $factory->slot('website', 'laravel.com', []);
         echo 'title<hr>';
         $factory->endSlot();
         echo 'component';
@@ -371,7 +371,7 @@ public function testComponentHandlingUsingViewObject()
         $factory->getDispatcher()->shouldReceive('dispatch');
         $factory->startComponent($factory->make('component'), ['name' => 'Taylor']);
         $factory->slot('title');
-        $factory->slot('website', 'laravel.com');
+        $factory->slot('website', 'laravel.com', []);
         echo 'title<hr>';
         $factory->endSlot();
         echo 'component';
@@ -392,7 +392,7 @@ public function testComponentHandlingUsingClosure()
             return $factory->make('component');
         }, ['name' => 'Taylor']);
         $factory->slot('title');
-        $factory->slot('website', 'laravel.com');
+        $factory->slot('website', 'laravel.com', []);
         echo 'title<hr>';
         $factory->endSlot();
         echo 'component';