From 009a32fbec243148d276e020ae1f7c9395b8040c Mon Sep 17 00:00:00 2001
From: Guy Sartorelli <guy.sartorelli@signify.co.nz>
Date: Tue, 29 Jun 2021 11:21:41 +1200
Subject: [PATCH 1/2] ENH Allow GridField readonly components to be globally
 modified.

---
 src/Forms/GridField/GridField.php | 41 ++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 15 deletions(-)

diff --git a/src/Forms/GridField/GridField.php b/src/Forms/GridField/GridField.php
index f5b76cd07..c3b0a2635 100644
--- a/src/Forms/GridField/GridField.php
+++ b/src/Forms/GridField/GridField.php
@@ -52,6 +52,28 @@ class GridField extends FormField
         'gridFieldAlterAction',
     ];
 
+    /**
+     * Default globally configured readonly components.
+     *
+     * @see $readonlyComponents
+     * @var array
+     */
+    private static $default_readonly_components = [
+        GridField_ActionMenu::class,
+        GridFieldConfig_RecordViewer::class,
+        GridFieldButtonRow::class,
+        GridFieldDataColumns::class,
+        GridFieldDetailForm::class,
+        GridFieldLazyLoader::class,
+        GridFieldPageCount::class,
+        GridFieldPaginator::class,
+        GridFieldFilterHeader::class,
+        GridFieldSortableHeader::class,
+        GridFieldToolbarHeader::class,
+        GridFieldViewButton::class,
+        GridState_Component::class,
+    ];
+
     /**
      * Data source.
      *
@@ -113,21 +135,7 @@ class GridField extends FormField
      *
      * @var array
      */
-    protected $readonlyComponents = [
-        GridField_ActionMenu::class,
-        GridFieldConfig_RecordViewer::class,
-        GridFieldButtonRow::class,
-        GridFieldDataColumns::class,
-        GridFieldDetailForm::class,
-        GridFieldLazyLoader::class,
-        GridFieldPageCount::class,
-        GridFieldPaginator::class,
-        GridFieldFilterHeader::class,
-        GridFieldSortableHeader::class,
-        GridFieldToolbarHeader::class,
-        GridFieldViewButton::class,
-        GridState_Component::class,
-    ];
+    protected $readonlyComponents = [];
 
     /**
      * Pattern used for looking up
@@ -144,6 +152,9 @@ class GridField extends FormField
     {
         parent::__construct($name, $title, null);
 
+        // Set readonly components for this gridfield.
+        $this->setReadonlyComponents($this->config()->get('default_readonly_components'));
+
         $this->name = $name;
 
         if ($dataList) {

From 365998f4453508cbb14d2e217a2003ae4a92ba7b Mon Sep 17 00:00:00 2001
From: Guy Sartorelli <guy.sartorelli@signify.co.nz>
Date: Tue, 29 Jun 2021 11:23:58 +1200
Subject: [PATCH 2/2] ENH Add extension point for modifying readonly
 GridFields.

Developers may want to amend a gridfield (either by modifying its
components or amending the list) after it has been transformed to be
readonly.
One such modification may be replacing the GridFieldViewButton
with something else - because components are instantiated with the "new"
keyword this would be the only way to do that.
---
 src/Forms/GridField/GridField.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Forms/GridField/GridField.php b/src/Forms/GridField/GridField.php
index c3b0a2635..a89104026 100644
--- a/src/Forms/GridField/GridField.php
+++ b/src/Forms/GridField/GridField.php
@@ -272,6 +272,8 @@ class GridField extends FormField
             $copyConfig->addComponent(new GridFieldViewButton);
         }
 
+        $copy->extend('afterPerformReadonlyTransformation', $this);
+
         return $copy;
     }