Issue #2938132 by tedbow, tim.plunkett, xjm, EclipseGc, AaronMcHale, alexpott,...

Issue #2938132 by tedbow, tim.plunkett, xjm, EclipseGc, AaronMcHale, alexpott, DyanneNova: Ship layouts that make sense with Layout Builder's concept of sections

core/modules/layout_builder/layout_builder.layouts.yml

+layout_twocol_section:
+  label: 'Two column'
+  path: layouts/twocol_section
+  template: layout--twocol-section
+  library: layout_builder/twocol_section
+  class: '\Drupal\layout_builder\Plugin\Layout\TwoColumnLayout'
+  category: 'Columns: 2'
+  default_region: first
+  icon_map:
+    - [first, second]
+  regions:
+    first:
+      label: First
+    second:
+      label: Second
+
+layout_threecol_section:
+  label: 'Three column'
+  path: layouts/threecol_section
+  template: layout--threecol-section
+  library: layout_builder/threecol_section
+  class: '\Drupal\layout_builder\Plugin\Layout\ThreeColumnLayout'
+  category: 'Columns: 3'
+  default_region: second
+  icon_map:
+    - [first, second, third]
+  regions:
+    first:
+      label: First
+    second:
+      label: Second
+    third:
+      label: Third
+
+layout_fourcol_section:
+  label: 'Four column'
+  path: layouts/fourcol_section
+  template: layout--fourcol-section
+  library: layout_builder/fourcol_section
+  category: 'Columns: 4'
+  default_region: first
+  icon_map:
+    - [first, second, third, fourth]
+  regions:
+    first:
+      label: First
+    second:
+      label: Second
+    third:
+      label: Third
+    fourth:
+      label: Fourth

core/modules/layout_builder/layout_builder.libraries.yml

@@ -8,3 +8,20 @@ drupal.layout_builder:
   dependencies:
     - core/jquery.ui.sortable
     - core/drupal.dialog.off_canvas
+
+# CSS libraries for Layout plugins.
+twocol_section:
+  version: VERSION
+  css:
+    theme:
+      layouts/twocol_section/twocol_section.css: {}
+threecol_section:
+  version: VERSION
+  css:
+    theme:
+      layouts/threecol_section/threecol_section.css: {}
+fourcol_section:
+  version: VERSION
+  css:
+    theme:
+      layouts/fourcol_section/fourcol_section.css: {}

core/modules/layout_builder/layout_builder.module

@@ -234,3 +234,35 @@ function layout_builder_layout_builder_section_storage_alter(array &$definitions
   $definitions['overrides']->getContextDefinition('entity')
     ->addConstraint('EntityHasField', OverridesSectionStorage::FIELD_NAME);
 }
+
+/**
+ * Implements hook_plugin_filter_TYPE__CONSUMER_alter().
+ */
+function layout_builder_plugin_filter_layout__layout_builder_alter(array &$definitions, array $extra) {
+  // Remove layouts provide by layout discovery that are not needed because of
+  // layouts provided by this module.
+  $duplicate_layouts = [
+    'layout_twocol',
+    'layout_twocol_bricks',
+    'layout_threecol_25_50_25',
+    'layout_threecol_33_34_33',
+  ];
+
+  foreach ($duplicate_layouts as $duplicate_layout) {
+    /** @var \Drupal\Core\Layout\LayoutDefinition[] $definitions */
+    if (isset($definitions[$duplicate_layout])) {
+      if ($definitions[$duplicate_layout]->getProvider() === 'layout_discovery') {
+        unset($definitions[$duplicate_layout]);
+      }
+    }
+  }
+
+  // Move the one column layout to the top.
+  if (isset($definitions['layout_onecol']) && $definitions['layout_onecol']->getProvider() === 'layout_discovery') {
+    $one_col = $definitions['layout_onecol'];
+    unset($definitions['layout_onecol']);
+    $definitions = [
+      'layout_onecol' => $one_col,
+    ] + $definitions;
+  }
+}

core/modules/layout_builder/layouts/fourcol_section/fourcol_section.css

+/*
+ * @file
+ * Provides the layout styles for four-column layout section.
+ */
+
+.layout--fourcol-section {
+  display: flex;
+  flex-wrap: wrap;
+}
+
+.layout--fourcol-section > .layout__region {
+  flex: 0 1 100%;
+}
+
+@media screen and (min-width: 40em) {
+  .layout--fourcol-section > .layout__region {
+    flex: 0 1 25%;
+  }
+}

core/modules/layout_builder/layouts/fourcol_section/layout--fourcol-section.html.twig

+{#
+/**
+ * @file
+ * Default theme implementation for a four-column 25%-25%-25%-25% layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+  set classes = [
+    'layout',
+    'layout--fourcol-section',
+  ]
+%}
+{% if content %}
+  <div{{ attributes.addClass(classes) }}>
+
+    {% if content.first %}
+      <div {{ region_attributes.first.addClass('layout__region', 'layout__region--first') }}>
+        {{ content.first }}
+      </div>
+    {% endif %}
+
+    {% if content.second %}
+      <div {{ region_attributes.second.addClass('layout__region', 'layout__region--second') }}>
+        {{ content.second }}
+      </div>
+    {% endif %}
+
+    {% if content.third %}
+      <div {{ region_attributes.third.addClass('layout__region', 'layout__region--third') }}>
+        {{ content.third }}
+      </div>
+    {% endif %}
+
+    {% if content.fourth %}
+      <div {{ region_attributes.fourth.addClass('layout__region', 'layout__region--fourth') }}>
+        {{ content.fourth }}
+      </div>
+    {% endif %}
+
+  </div>
+{% endif %}

core/modules/layout_builder/layouts/threecol_section/layout--threecol-section.html.twig

+{#
+/**
+ * @file
+ * Default theme implementation for a three-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{% if content %}
+  <div{{ attributes.addClass(classes) }}>
+
+    {% if content.first %}
+      <div {{ region_attributes.first.addClass('layout__region', 'layout__region--first') }}>
+        {{ content.first }}
+      </div>
+    {% endif %}
+
+    {% if content.second %}
+      <div {{ region_attributes.second.addClass('layout__region', 'layout__region--second') }}>
+        {{ content.second }}
+      </div>
+    {% endif %}
+
+    {% if content.third %}
+      <div {{ region_attributes.third.addClass('layout__region', 'layout__region--third') }}>
+        {{ content.third }}
+      </div>
+    {% endif %}
+
+  </div>
+{% endif %}

core/modules/layout_builder/layouts/threecol_section/threecol_section.css

+/*
+ * @file
+ * Provides the layout styles for three-column layout section.
+ */
+
+.layout--threecol-section {
+  display: flex;
+  flex-wrap: wrap;
+}
+
+.layout--threecol-section > .layout__region {
+  flex: 0 1 100%;
+}
+
+@media screen and (min-width: 40em) {
+  .layout--threecol-section--25-50-25 > .layout__region--first,
+  .layout--threecol-section--25-50-25 > .layout__region--third,
+  .layout--threecol-section--25-25-50 > .layout__region--first,
+  .layout--threecol-section--25-25-50 > .layout__region--second,
+  .layout--threecol-section--50-25-25 > .layout__region--second,
+  .layout--threecol-section--50-25-25 > .layout__region--third {
+    flex: 0 1 25%;
+  }
+  .layout--threecol-section--25-50-25 > .layout__region--second,
+  .layout--threecol-section--25-25-50 > .layout__region--third,
+  .layout--threecol-section--50-25-25 > .layout__region--first {
+    flex: 0 1 50%;
+  }
+  .layout--threecol-section--33-34-33 > .layout__region--first,
+  .layout--threecol-section--33-34-33 > .layout__region--third {
+    flex: 0 1 33%;
+  }
+  .layout--threecol-section--33-34-33 > .layout__region--second {
+    flex: 0 1 34%;
+  }
+}

core/modules/layout_builder/layouts/twocol_section/layout--twocol-section.html.twig

+{#
+/**
+ * @file
+ * Default theme implementation to display a two-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{% if content %}
+  <div{{ attributes }}>
+
+    {% if content.first %}
+      <div {{ region_attributes.first.addClass('layout__region', 'layout__region--first') }}>
+        {{ content.first }}
+      </div>
+    {% endif %}
+
+    {% if content.second %}
+      <div {{ region_attributes.second.addClass('layout__region', 'layout__region--second') }}>
+        {{ content.second }}
+      </div>
+    {% endif %}
+
+  </div>
+{% endif %}

core/modules/layout_builder/layouts/twocol_section/twocol_section.css

+/*
+ * @file
+ * Provides the layout styles for two-column layout section.
+ */
+
+.layout--twocol-section {
+  display: flex;
+  flex-wrap: wrap;
+}
+
+.layout--twocol-section > .layout__region {
+  flex: 0 1 100%;
+}
+
+@media screen and (min-width: 40em) {
+  .layout--twocol-section.layout--twocol-section--50-50 > .layout__region--first,
+  .layout--twocol-section.layout--twocol-section--50-50 > .layout__region--second {
+    flex: 0 1 50%;
+  }
+
+  .layout--twocol-section.layout--twocol-section--33-67 > .layout__region--first,
+  .layout--twocol-section.layout--twocol-section--67-33 > .layout__region--second {
+    flex: 0 1 33%;
+  }
+
+  .layout--twocol-section.layout--twocol-section--33-67 > .layout__region--second,
+  .layout--twocol-section.layout--twocol-section--67-33 > .layout__region--first {
+    flex: 0 1 67%;
+  }
+
+  .layout--twocol-section.layout--twocol-section--25-75 > .layout__region--first,
+  .layout--twocol-section.layout--twocol-section--75-25 > .layout__region--second {
+    flex: 0 1 25%;
+  }
+
+  .layout--twocol-section.layout--twocol-section--25-75 > .layout__region--second,
+  .layout--twocol-section.layout--twocol-section--75-25 > .layout__region--first {
+    flex: 0 1 75%;
+  }
+}

core/modules/layout_builder/src/Plugin/Layout/MultiWidthLayoutBase.php

+<?php
+
+namespace Drupal\layout_builder\Plugin\Layout;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Layout\LayoutDefault;
+use Drupal\Core\Plugin\PluginFormInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+
+/**
+ * Base class of layouts with configurable widths.
+ *
+ * @internal
+ *   Layout Builder is currently experimental and should only be leveraged by
+ *   experimental modules and development releases of contributed modules.
+ *   See https://www.drupal.org/core/experimental for more information.
+ */
+abstract class MultiWidthLayoutBase extends LayoutDefault implements PluginFormInterface {
+
+  use StringTranslationTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    $width_classes = array_keys($this->getWidthOptions());
+    return [
+      'column_widths' => array_shift($width_classes),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form['column_widths'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Column widths'),
+      '#default_value' => $this->configuration['column_widths'],
+      '#options' => $this->getWidthOptions(),
+      '#description' => $this->t('Choose the column widths for this layout.'),
+    ];
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+    $this->configuration['column_widths'] = $form_state->getValue('column_widths');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function build(array $regions) {
+    $build = parent::build($regions);
+    $build['#attributes']['class'] = [
+      'layout',
+      $this->getPluginDefinition()->getTemplate(),
+      $this->getPluginDefinition()->getTemplate() . '--' . $this->configuration['column_widths'],
+    ];
+    return $build;
+  }
+
+  /**
+   * Gets the width options for the configuration form.
+   *
+   * The first option will be used as the default 'column_widths' configuration
+   * value.
+   *
+   * @return string[]
+   *   The width options array where the keys are strings that will be added to
+   *   the CSS classes and the values are the human readable labels.
+   */
+  abstract protected function getWidthOptions();
+
+}

core/modules/layout_builder/src/Plugin/Layout/ThreeColumnLayout.php

+<?php
+
+namespace Drupal\layout_builder\Plugin\Layout;
+
+/**
+ * Configurable three column layout plugin class.
+ *
+ * @internal
+ *   Plugin classes are internal.
+ */
+class ThreeColumnLayout extends MultiWidthLayoutBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getWidthOptions() {
+    return [
+      '25-50-25' => '25%/50%/25%',
+      '33-34-33' => '33%/34%/33%',
+      '25-25-50' => '25%/25%/50%',
+      '50-25-25' => '50%/25%/25%',
+    ];
+  }
+
+}

core/modules/layout_builder/src/Plugin/Layout/TwoColumnLayout.php

+<?php
+
+namespace Drupal\layout_builder\Plugin\Layout;
+
+/**
+ * Configurable two column layout plugin class.
+ *
+ * @internal
+ *   Plugin classes are internal.
+ */
+class TwoColumnLayout extends MultiWidthLayoutBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getWidthOptions() {
+    return [
+      '50-50' => '50%/50%',
+      '33-67' => '33%/67%',
+      '67-33' => '67%/33%',
+      '25-75' => '25%/75%',
+      '75-25' => '75%/25%',
+    ];
+  }
+
+}

core/modules/layout_builder/tests/src/Functional/LayoutBuilderTest.php

@@ -192,8 +192,11 @@ public function testLayoutBuilderUi() {
 
     // Add a new section.
     $this->clickLink('Add Section');
+    $this->assertCorrectLayouts();
     $assert_session->linkExists('Two column');
     $this->clickLink('Two column');
+    $assert_session->buttonExists('Add section');
+    $page->pressButton('Add section');
     $assert_session->linkExists('Save Layout');
     $this->clickLink('Save Layout');
     $assert_session->pageTextNotContains('The first node body');
@@ -518,7 +521,8 @@ public function testLayoutBuilderChooseBlocksAlter() {
     $this->clickLink('Add Section', 1);
     $assert_session->linkExists('Two column');
     $this->clickLink('Two column');
-
+    $assert_session->buttonExists('Add section');
+    $this->getSession()->getPage()->pressButton('Add section');
     // Add a new block to second section.
     $this->clickLink('Add Block', 1);
 
@@ -680,4 +684,31 @@ public function testSimpleConfigBasedLayout() {
     $assert_session->elementsCount('css', '.layout--onecol', 1);
   }
 
+  /**
+   * Asserts that the correct layouts are available.
+   */
+  protected function assertCorrectLayouts() {
+    $assert_session = $this->assertSession();
+    // Ensure the layouts provided by layout_builder are available.
+    $expected_layouts_hrefs = [
+      'layout_builder/add/section/overrides/node.1/0/layout_onecol',
+      'layout_builder/configure/section/overrides/node.1/0/layout_twocol_section',
+      'layout_builder/configure/section/overrides/node.1/0/layout_threecol_section',
+      'layout_builder/add/section/overrides/node.1/0/layout_fourcol_section',
+    ];
+    foreach ($expected_layouts_hrefs as $expected_layouts_href) {
+      $assert_session->linkByHrefExists($expected_layouts_href);
+    }
+    // Ensure the layout_discovery module's layouts were removed.
+    $unexpected_layouts = [
+      'twocol',
+      'twocol_bricks',
+      'threecol_25_50_25',
+      'threecol_33_34_33',
+    ];
+    foreach ($unexpected_layouts as $unexpected_layout) {
+      $assert_session->linkByHrefNotExists("layout_builder/add/section/overrides/node.1/0/$unexpected_layout");
+    }
+  }
+
 }

core/modules/layout_builder/tests/src/FunctionalJavascript/TestMultiWidthLayoutsTest.php

+<?php
+
+namespace Drupal\Tests\layout_builder\FunctionalJavascript;
+
+use Drupal\FunctionalJavascriptTests\WebDriverTestBase;
+
+/**
+ * Test the multi-width layout plugins.
+ *
+ * @group layout_builder
+ */
+class TestMultiWidthLayoutsTest extends WebDriverTestBase {
+
+  /**
+   * Path prefix for the field UI for the test bundle.
+   *
+   * @var string
+   */
+  const FIELD_UI_PREFIX = 'admin/structure/types/manage/bundle_with_section_field';
+
+  public static $modules = [
+    'layout_builder',
+    'block',
+    'node',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // @todo The Layout Builder UI relies on local tasks; fix in
+    //   https://www.drupal.org/project/drupal/issues/2917777.
+    $this->drupalPlaceBlock('local_tasks_block');
+
+    $this->createContentType(['type' => 'bundle_with_section_field']);
+
+    $this->drupalLogin($this->drupalCreateUser([
+      'configure any layout',
+      'administer node display',
+      'administer node fields',
+    ]));
+  }
+
+  /**
+   * Test changing the columns widths of a multi-width section.
+   */
+  public function testWidthChange() {
+    $assert_session = $this->assertSession();
+    $page = $this->getSession()->getPage();
+
+    // Enable layout builder.
+    $this->drupalPostForm(
+      static::FIELD_UI_PREFIX . '/display/default',
+      ['layout[enabled]' => TRUE],
+      'Save'
+    );
+
+    $this->clickLink('Manage layout');
+    $assert_session->addressEquals(static::FIELD_UI_PREFIX . '/display-layout/default');
+
+    $width_options = [
+      [
+        'label' => 'Two column',
+        'widths' => [
+          '50-50',
+          '33-67',
+          '67-33',
+          '25-75',
+          '75-25',
+        ],