feat(editor-preview): allow to disable editor preview for all collections (#4423)

packages/netlify-cms-core/src/actions/__tests__/config.spec.js

@@ -419,6 +419,34 @@ describe('config', () => {
           ).toEqual(false);
         });
       });
+
+      describe('editor preview', () => {
+        it('should set editor preview honoring global config before and specific config after', () => {
+          const config = applyDefaults(
+            fromJS({
+              editor: {
+                preview: false,
+              },
+              collections: [
+                {
+                  fields: [{ name: 'title' }],
+                  folder: 'foo',
+                },
+                {
+                  editor: {
+                    preview: true,
+                  },
+                  fields: [{ name: 'title' }],
+                  folder: 'bar',
+                },
+              ],
+            }),
+          );
+
+          expect(config.getIn(['collections', 0, 'editor', 'preview'])).toEqual(false);
+          expect(config.getIn(['collections', 1, 'editor', 'preview'])).toEqual(true);
+        });
+      });
     });
 
     test('should convert camel case to snake case', () => {

packages/netlify-cms-core/src/actions/config.js

@@ -267,6 +267,10 @@ export function applyDefaults(config) {
             );
           }
 
+          if (map.hasIn(['editor', 'preview']) && !collection.has('editor')) {
+            collection = collection.setIn(['editor', 'preview'], map.getIn(['editor', 'preview']));
+          }
+
           return collection;
         }),
       );

packages/netlify-cms-core/src/constants/configSchema.js

@@ -284,6 +284,12 @@ const getConfigSchema = () => ({
       },
       uniqueItemProperties: ['name'],
     },
+    editor: {
+      type: 'object',
+      properties: {
+        preview: { type: 'boolean' },
+      },
+    },
   },
   required: ['backend', 'collections'],
   anyOf: [{ required: ['media_folder'] }, { required: ['media_library'] }],

website/content/docs/configuration-options.md

@@ -365,6 +365,8 @@ This setting changes options for the editor view of the collection. It has one o
      preview: false
 ```
 
+**Note**: Setting this as a top level configuration will set the default for all collections
+
 ### `summary`
 
 This setting allows the customization of the collection list view. Similar to the `slug` field, a string with templates can be used to include values of different fields, e.g. `{{title}}`. This option over-rides the default of `title` field and `identifier_field`.