From e1ef27e0b48af71c7e674b16f07502a0bb5fca9e Mon Sep 17 00:00:00 2001
From: Andreas Schempp <andreas.schempp@terminal42.ch>
Date: Fri, 15 Jul 2022 11:06:19 +0200
Subject: [PATCH] Allow to switch language in edit and paste mode

---
 .../BackendView/ArticleViewListener.php       | 18 ++++++++++++++---
 .../BackendView/PageViewListener.php          |  2 +-
 .../BackendView/ParentChildViewListener.php   | 20 +++++++++++++++++--
 src/EventListener/CallbackSetupListener.php   |  1 +
 4 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/src/EventListener/BackendView/ArticleViewListener.php b/src/EventListener/BackendView/ArticleViewListener.php
index 00b7e5d..8598480 100644
--- a/src/EventListener/BackendView/ArticleViewListener.php
+++ b/src/EventListener/BackendView/ArticleViewListener.php
@@ -7,6 +7,7 @@
 use Contao\ArticleModel;
 use Contao\Controller;
 use Contao\Input;
+use Contao\Model;
 use Contao\Model\Collection;
 use Contao\PageModel;
 use Contao\Session;
@@ -24,7 +25,10 @@ class ArticleViewListener extends AbstractViewListener
      */
     protected function isSupported()
     {
-        return 'article' === (string) Input::get('do');
+        return 'article' === (string) Input::get('do')
+            && (('edit' === Input::get('act') && empty(Input::get('table')))
+                || ($this->getTable() === Input::get('table'))
+            );
     }
 
     /**
@@ -33,7 +37,15 @@ protected function isSupported()
     protected function getCurrentPage()
     {
         if (false === $this->currentArticle) {
-            $this->currentArticle = ArticleModel::findByPk($this->dataContainer->id);
+            if (Input::get('table') === $this->getTable() && !empty(Input::get('act'))) {
+                if ('paste' !== Input::get('act')) {
+                    return null;
+                }
+
+                $this->currentArticle = ArticleModel::findOneBy(['tl_article.id=(SELECT pid FROM tl_content WHERE id=?)'], [$this->dataContainer->id]);
+            } else {
+                $this->currentArticle = ArticleModel::findByPk($this->dataContainer->id);
+            }
         }
 
         if (null === $this->currentArticle) {
@@ -96,7 +108,7 @@ protected function getAvailableLanguages(PageModel $page)
      */
     protected function doSwitchView($id): void
     {
-        $url = Url::removeQueryString(['switchLanguage']);
+        $url = Url::removeQueryString(['switchLanguage', 'act', 'mode']);
         $url = Url::addQueryString('id='.$id, $url);
 
         Controller::redirect($url);
diff --git a/src/EventListener/BackendView/PageViewListener.php b/src/EventListener/BackendView/PageViewListener.php
index cc422e7..3b9bd82 100644
--- a/src/EventListener/BackendView/PageViewListener.php
+++ b/src/EventListener/BackendView/PageViewListener.php
@@ -17,7 +17,7 @@ class PageViewListener extends AbstractViewListener
      */
     protected function isSupported()
     {
-        return 'page' === Input::get('do') || 'article' === Input::get('do');
+        return 'page' === Input::get('do') || ('article' === Input::get('do') && 'edit' !== Input::get('act'));
     }
 
     /**
diff --git a/src/EventListener/BackendView/ParentChildViewListener.php b/src/EventListener/BackendView/ParentChildViewListener.php
index 6b027f2..6ca9bec 100644
--- a/src/EventListener/BackendView/ParentChildViewListener.php
+++ b/src/EventListener/BackendView/ParentChildViewListener.php
@@ -32,7 +32,15 @@ protected function getCurrentPage()
             /** @var string|Model $class */
             $class = $this->getModelClass();
 
-            $this->current = class_exists($class) ? $class::findByPk($this->dataContainer->id) : null;
+            if (!class_exists($class)) {
+                return null;
+            }
+dump($class, $this->getTable());
+            if ('paste' === Input::get('act') || ('edit' === Input::get('act') && 'tl_content' === $this->getTable())) {
+                $this->current = $class::findOneBy(['id=(SELECT pid FROM '.$this->getTable().' WHERE id=?)'], [$this->dataContainer->id]);
+            } else {
+                $this->current = $class::findByPk($this->dataContainer->id);
+            }
         }
 
         if (null === $this->current) {
@@ -72,7 +80,11 @@ protected function getAvailableLanguages(PageModel $page)
      */
     protected function doSwitchView($id): void
     {
-        $url = Url::removeQueryString(['switchLanguage']);
+        if ('edit' === Input::get('act') && 'tl_content' !== $this->getTable()) {
+            $url = Url::removeQueryString(['switchLanguage']);
+        } else {
+            $url = Url::removeQueryString(['switchLanguage', 'act', 'mode']);
+        }
         $url = Url::addQueryString('id='.$id, $url);
 
         Controller::redirect($url);
@@ -121,6 +133,10 @@ private function getModelClass()
     {
         Controller::loadDataContainer($this->getTable());
 
+        if ('edit' === Input::get('act') && 'tl_content' !== $this->getTable()) {
+            return Model::getClassFromTable($this->getTable());
+        }
+
         return Model::getClassFromTable($GLOBALS['TL_DCA'][$this->getTable()]['config']['ptable']);
     }
 
diff --git a/src/EventListener/CallbackSetupListener.php b/src/EventListener/CallbackSetupListener.php
index 8511b92..432ae70 100644
--- a/src/EventListener/CallbackSetupListener.php
+++ b/src/EventListener/CallbackSetupListener.php
@@ -17,6 +17,7 @@ class CallbackSetupListener
         'tl_article' => [
             'Terminal42\ChangeLanguage\EventListener\DataContainer\ArticleListener',
             'Terminal42\ChangeLanguage\EventListener\BackendView\PageViewListener',
+            'Terminal42\ChangeLanguage\EventListener\BackendView\ArticleViewListener',
         ],
         'tl_content' => [
             'Terminal42\ChangeLanguage\EventListener\BackendView\ArticleViewListener',