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+{#
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+/**
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+ * @file
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+ * Default theme implementation for a menu block.
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+ *
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+ * Available variables:
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+ * - plugin_id: The ID of the block implementation.
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+ * - label: The configured label of the block if visible.
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+ * - configuration: A list of the block's configuration values.
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+ * - label: The configured label for the block.
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+ * - label_display: The display settings for the label.
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+ * - provider: The module or other provider that provided this block plugin.
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+ * - Block plugin specific settings will also be stored here.
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+ * - content: The content of this block.
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+ * - attributes: HTML attributes for the containing element.
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+ * - id: A valid HTML ID and guaranteed unique.
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+ * - title_attributes: HTML attributes for the title element.
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+ * - content_attributes: HTML attributes for the content element.
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+ * - title_prefix: Additional output populated by modules, intended to be
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+ * displayed in front of the main title tag that appears in the template.
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+ * - title_suffix: Additional output populated by modules, intended to be
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+ * displayed after the main title tag that appears in the template.
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+ *
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+ * Headings should be used on navigation menus that consistently appear on
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+ * multiple pages. When this menu block's label is configured to not be
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+ * displayed, it is automatically made invisible using the 'visually-hidden' CSS
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+ * class, which still keeps it visible for screen-readers and assistive
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+ * technology. Headings allow screen-reader and keyboard only users to navigate
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+ * to or skip the links.
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+ * See http://juicystudio.com/article/screen-readers-display-none.php and
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+ * http://www.w3.org/TR/WCAG-TECHS/H42.html for more information.
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+ *
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+ * @ingroup themeable
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+ */
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+#}
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+{% set heading_id = attributes.id ~ '-menu'|clean_id %}
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+
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+<nav role="navigation" aria-labelledby="{{ heading_id }}"{{ attributes|without('role', 'aria-labelledby') }}>
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+ {# Label. If not displayed, we still provide it for screen readers. #}
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+ {% if not configuration.label_display %}
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+ {% set title_attributes = title_attributes.addClass('visually-hidden') %}
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+ {% endif %}
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+ {{ title_prefix }}
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+ <h2{{ title_attributes.setAttribute('id', heading_id) }}>{{ configuration.label }}</h2>
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+ {{ title_suffix }}
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+
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+ {# Menu. #}
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+ {% block content %}
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+ {{ content }}
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+ {% endblock %}
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+</nav>
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