BUG: Use preview renderingMode for page preview

[mhsdesign]

The "Show Preview" button in the content module, as well as the "Open page in 'Foo' workspace" in the workspace module does not work as executed.

History

• The /neos/preview?node=... endpoint was introduced to avoid cache flooding of the show-action's /my-page@user-admin;language=en_US syntax.
  • FEATURE: Custom Route for node preview #2654
• Some kind of bugfix was planned at the Berlin Post con sprint '23 but never finished
  • WIP: Rename previewAction to editAction #4217
• With Neos 9 we introduced an explicit renderingMode and replaced all workspace based inBackend checks. That makes it possible to set the renderingMode via the controller directly in the view.
  • FEATURE: Fusion renderingMode semantic correct inBackend #4396

Current state

Currently, we still fetch the renderingMode from the users' session, so the "Show Preview" will still render as edit mode instead of preview. (See todo in the NodeController)

Following new Neos 9 differences to 8.3 currently exist:

• the preview always redirects to the live workspace instead of the base workspace
  • introduced via BUGFIX: Workspace preview should point to base workspace
  • enhanced via BUGFIX: Prevent preview button to link to the personal user workspace
  • this should be fixable by adjusting BackendController::redirectToAction and NodeInfoHelper::createRedirectToNode to behave again like Neos 8.3

These issues also exits in Neos 8.3 and should be fixable via the new renderingMode:

• the "Show Preview" button is rather a "Show base version" (as the base workspace is previewed)
  • either adjust the label to better reflect that behaviour (comment)
  • or show all current user changes in of the user workspace (comment)
    • this has only become possible with the workspace independent renderingMode
• Editor preview should not show hidden elements
• Node URIs are not converted in frontend preview of workspaces
• Allow edit and preview in separate windows

Acceptance criteria

• The button "Open page in 'Foo' workspace" in the workspace module will use a preview editPreviewMode and evaluate renderingMode.isPreview to true and isEdit to false.
• The button "Show Preview" in the content module will use a preview editPreviewMode and evaluate renderingMode.isPreview to true and isEdit to false.
• Navigating inside a preview page will keep the preview renderingMode