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plugins/editors-xtd/article/article.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<extension type="plugin" group="editors-xtd" method="upgrade">
+	<name>plg_editors-xtd_article</name>
+	<author>Joomla! Project</author>
+	<creationDate>2009-10</creationDate>
+	<copyright>(C) 2009 Open Source Matters, Inc.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>admin@joomla.org</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>3.0.0</version>
+	<description>PLG_ARTICLE_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\EditorsXtd\Article</namespace>
+	<files>
+		<folder plugin="article">services</folder>
+		<folder>src</folder>
+	</files>
+	<languages>
+		<language tag="en-GB">language/en-GB/plg_editors-xtd_article.ini</language>
+		<language tag="en-GB">language/en-GB/plg_editors-xtd_article.sys.ini</language>
+	</languages>
+</extension>

plugins/editors-xtd/article/services/provider.php

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+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Editors-xtd.article
+ *
+ * @copyright   (C) 2023 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+\defined('_JEXEC') or die;
+
+use Joomla\CMS\Extension\PluginInterface;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\DI\Container;
+use Joomla\DI\ServiceProviderInterface;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Plugin\EditorsXtd\Article\Extension\Article;
+
+return new class () implements ServiceProviderInterface {
+    /**
+     * Registers the service provider with a DI container.
+     *
+     * @param   Container  $container  The DI container.
+     *
+     * @return  void
+     *
+     * @since   4.3.0
+     */
+    public function register(Container $container)
+    {
+        $container->set(
+            PluginInterface::class,
+            function (Container $container) {
+                $plugin     = new Article(
+                    $container->get(DispatcherInterface::class),
+                    (array) PluginHelper::getPlugin('editors-xtd', 'article')
+                );
+                $plugin->setApplication(Factory::getApplication());
+
+                return $plugin;
+            }
+        );
+    }
+};

plugins/editors-xtd/article/src/Extension/Article.php

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+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Editors-xtd.article
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\EditorsXtd\Article\Extension;
+
+use Joomla\CMS\Editor\Button\Button;
+use Joomla\CMS\Event\Editor\EditorButtonsSetupEvent;
+use Joomla\CMS\Language\Text;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\CMS\Session\Session;
+use Joomla\Event\SubscriberInterface;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Editor Article button
+ *
+ * @since  1.5
+ */
+final class Article extends CMSPlugin implements SubscriberInterface
+{
+    /**
+     * Returns an array of events this subscriber will listen to.
+     *
+     * @return array
+     *
+     * @since   5.0.0
+     */
+    public static function getSubscribedEvents(): array
+    {
+        return ['onEditorButtonsSetup' => 'onEditorButtonsSetup'];
+    }
+
+    /**
+     * @param  EditorButtonsSetupEvent $event
+     * @return void
+     *
+     * @since   5.0.0
+     */
+    public function onEditorButtonsSetup(EditorButtonsSetupEvent $event)
+    {
+        $subject  = $event->getButtonsRegistry();
+        $disabled = $event->getDisabledButtons();
+
+        if (\in_array($this->_name, $disabled)) {
+            return;
+        }
+
+        $this->loadLanguage();
+
+        $button = $this->onDisplay($event->getEditorId());
+
+        if ($button) {
+            $subject->add($button);
+        }
+    }
+
+    /**
+     * Display the button
+     *
+     * @param   string  $name  The name of the button to add
+     *
+     * @return  Button|void  The button options as Button object, void if ACL check fails.
+     *
+     * @since   1.5
+     *
+     * @deprecated  6.0 Use onEditorButtonsSetup event
+     */
+    public function onDisplay($name)
+    {
+        $user  = $this->getApplication()->getIdentity();
+
+        // Can create in any category (component permission) or at least in one category
+        $canCreateRecords = $user->authorise('core.create', 'com_content')
+            || \count($user->getAuthorisedCategories('com_content', 'core.create')) > 0;
+
+        // Instead of checking edit on all records, we can use **same** check as the form editing view
+        $values           = (array) $this->getApplication()->getUserState('com_content.edit.article.id');
+        $isEditingRecords = \count($values);
+
+        // This ACL check is probably a double-check (form view already performed checks)
+        $hasAccess = $canCreateRecords || $isEditingRecords;
+        if (!$hasAccess) {
+            return;
+        }
+
+        $link = 'index.php?option=com_content&view=articles&layout=modal&tmpl=component&'
+            . Session::getFormToken() . '=1&editor=' . $name;
+
+        $button = new Button(
+            $this->_name,
+            [
+                'action'  => 'modal',
+                'link'    => $link,
+                'text'    => Text::_('PLG_ARTICLE_BUTTON_ARTICLE'),
+                'icon'    => 'file-add',
+                'iconSVG' => '<svg viewBox="0 0 32 32" width="24" height="24"><path d="M28 24v-4h-4v4h-4v4h4v4h4v-4h4v-4zM2 2h18v6h6v10h2v-10l-8-'
+                    . '8h-20v32h18v-2h-16z"></path></svg>',
+                // This is whole Plugin name, it is needed for keeping backward compatibility
+                'name' => $this->_type . '_' . $this->_name,
+            ]
+        );
+
+        return $button;
+    }
+}