{# Set banner color via CSS. #}
{%- set banner_classes = 'scv-banner' %}
{%- if html_theme in ('sphinx_rtd_theme', 'bizstyle', 'classic', 'traditional') %}
    {%- set banner_classes = banner_classes + ' scv-' + html_theme %}
{%- endif %}

{# Set banner message. #}
{%- if scv_banner_main_version != current_version %}
    {# Determine base message. #}
    {%- if scv_is_branch %}
        {%- set banner_message = '<b>Warning:</b> This document is for the development version of %s.'|format(project) %}
    {%- else %}
        {%- set banner_message = '<b>Warning:</b> This document is for an old version of %s.'|format(project) %}
    {%- endif %}
    {# Determine URL of main version. #}
    {%- if vhasdoc(scv_banner_main_version) %}
        {%- set banner_message = '<a href="%s">' + banner_message + ' The %s version is %s.</a>' %}
        {%- if scv_banner_main_ref_is_tag %}
            {%- set banner_message = banner_message|format(vpathto(scv_banner_main_version), 'latest', scv_banner_main_version) %}
        {%- else %}
            {%- set banner_message = banner_message|format(vpathto(scv_banner_main_version), 'main', scv_banner_main_version) %}
        {%- endif %}
    {%- endif %}
{%- endif %}

{# Display banner. #}
{% block banner %}
{%- if banner_message %}
    <p class="{{ banner_classes }}">{{ banner_message }}</p>
{%- endif %}
{% endblock %}