Allow the view_config to be passed into the DocumentComponent

Author: cbeer

app/components/blacklight/document_component.rb

@@ -34,15 +34,15 @@ class DocumentComponent < Blacklight::Component
 
     # The document title with some reasonable default behavior
     renders_one :title, (lambda do |*args, component: nil, **kwargs|
-      component ||= @presenter&.view_config&.title_component || Blacklight::DocumentTitleComponent
+      component ||= view_config.title_component || Blacklight::DocumentTitleComponent
 
       component.new(*args, counter: @counter, document: @document, presenter: @presenter, as: @title_component, actions: !@show, link_to_document: !@show, document_component: self, **kwargs)
     end)
 
     renders_one :embed, (lambda do |static_content = nil, *args, component: nil, **kwargs|
       next static_content if static_content.present?
 
-      component ||= @presenter.view_config&.embed_component
+      component ||= view_config.embed_component
 
       next unless component
 
@@ -53,7 +53,7 @@ class DocumentComponent < Blacklight::Component
     renders_one :metadata, (lambda do |static_content = nil, *args, component: nil, fields: nil, **kwargs|
       next static_content if static_content.present?
 
-      component ||= @presenter&.view_config&.metadata_component || Blacklight::DocumentMetadataComponent
+      component ||= view_config.metadata_component || Blacklight::DocumentMetadataComponent
 
       component.new(*args, fields: fields || @presenter&.field_presenters || [], **kwargs)
     end)
@@ -64,7 +64,7 @@ class DocumentComponent < Blacklight::Component
     renders_one :thumbnail, (lambda do |image_options_or_static_content = {}, *args, component: nil, **kwargs|
       next image_options_or_static_content if image_options_or_static_content.is_a? String
 
-      component ||= @presenter&.view_config&.thumbnail_component || Blacklight::Document::ThumbnailComponent
+      component ||= view_config.thumbnail_component || Blacklight::Document::ThumbnailComponent
 
       component.new(*args, document: @document, presenter: @presenter, counter: @counter, image_options: image_options_or_static_content, **kwargs)
     end)
@@ -91,7 +91,7 @@ class DocumentComponent < Blacklight::Component
     def initialize(document: nil, presenter: nil, partials: nil,
                    id: nil, classes: [], component: :article, title_component: nil,
                    counter: nil, document_counter: nil, counter_offset: 0,
-                   show: false, **args)
+                   show: false, view_config: nil, **args)
       Blacklight.deprecation.warn('the `presenter` argument to DocumentComponent#initialize is deprecated; pass the `presenter` in as document instead') if presenter
 
       @presenter = presenter || document || args[self.class.collection_parameter]
@@ -108,6 +108,7 @@ def initialize(document: nil, presenter: nil, partials: nil,
       @counter ||= 1 + @document_counter + counter_offset if @document_counter.present?
 
       @show = show
+      @view_config = view_config
     end
     # rubocop:enable Metrics/ParameterLists
 
@@ -124,7 +125,7 @@ def classes
     def before_render
       set_slot(:title, nil) unless title
       set_slot(:thumbnail, nil) unless thumbnail || show?
-      set_slot(:metadata, nil, fields: presenter.field_presenters, show: @show) unless metadata
+      set_slot(:metadata, nil, fields: field_presenters, show: @show) unless metadata
       set_slot(:embed, nil) unless embed
       if view_partials.present?
         view_partials.each do |view_partial|
@@ -137,6 +138,12 @@ def before_render
       end
     end
 
+    def view_config
+      @view_config ||= presenter&.view_config || Blacklight::Configuration::ViewConfig.new
+    end
+
+    delegate :field_presenters, to: :presenter
+
     private
 
     attr_reader :document_counter, :presenter, :view_partials