[2.0.0-alpha1] Add new Form Builder

Form implementation too heavy

The form implementation was done using UI elements from paragraphs module, as it was initially discussed, but we underestimated the hevainess of the paragraphs source code.

Now 20 % of the project PHP code is found in /src/form/

Also, addition of:

• ui_patterns.module
• templates/
• css/
• icons/
• js/
• src/Element/DropdownAction
• src/Element/UiPatternsOperations

The current state of specifications is taking inspiration from Image Styles admin pages and Manage Display admin pages. It may be lighter because using Drupal Core native form elements.

Update of the slots & props forms when variant is changes

This is an undocumented behaviour. I know we want to make the condition mechanism addable in UI Patterns Settings 3.x, but is there a simpler way ? Also, if we change variants, do we keep our props settings?

Context management

How to add context to Source plugins was documented and tessted. But it still not clear how to set the conetxt from the consumer plugins (layout, field formatters...).

Maybe it is not implemented yet in the form builder:

  protected function getComponentSourceContexts(): array {
    return [];
  }

Failed tests

I don't know if the issue is on the "consumer" side or the form builder side:

Layout plugin:

• variant is not saved
• Issues with Layout Builder: "add blocks" not in the regions, & blcok not configurable. I guess we need to add some stuff from ui_patterns_layout_builder

Block plugin:

• "RuntimeException: The subform and parent form must contain the #parents property, which must be an array." maybe because we are using buildComponentsForm() from blockForm() instead of buildConfigurationForm()

View style plugin

• Call to undefined method Drupal\Core\Form\FormState::getCompleteFormState() in ComponentStyle->buildOptionsForm(). Do I need to use ComponentSettingsFormBuilderTrait instead?

FieldFormatters:

• Don't work on layout builder
• Some sources (example: menu and breadcrumb for links) show up in layout builder but not in manage display

alterComponent

Some source plugins have alterComponent() method which is a successor of UI Patterns Settings alterElement() method.

Examples:

• https://git.drupalcode.org/project/ui_patterns/-/blob/2.0.x/src/Plugin/U...
• https://git.drupalcode.org/project/ui_patterns/-/blob/2.0.x/src/Plugin/U...

Do we manage them in the form builder, because we already buildComponentData() here? Or do we move this and buildComponentData() to another service?

"Form implementation too heavy" will be done in #3414363: [2.0.0-alpha1] Form builder: Simpler sources selector (1/2)

"alterComponent" was already done in the ComponentElementBuilder

Merged. Future tasks will be done in dedicated issues.