{% macro govukButton(params) %}
{% from "govuk_frontend_jinja/macros/attributes.html" import govukAttributes %}

{#- Set classes for this component #}
{%- set classNames = "govuk-button" -%}

{%- if params.classes %}
  {% set classNames = classNames ~ " " ~ params.classes %}
{% endif %}

{%- if params.isStartButton %}
  {% set classNames = classNames ~ " govuk-button--start" %}
{% endif %}

{%- macro _startIcon() %}
  {#- The SVG needs `focusable="false"` so that Internet Explorer does not
  treat it as an interactive element - without this it will be
  'focusable' when using the keyboard to navigate. #}
  <svg class="govuk-button__start-icon" xmlns="http://www.w3.org/2000/svg" width="17.5" height="19" viewBox="0 0 33 40" aria-hidden="true" focusable="false">
    <path fill="currentColor" d="M0 0h13l20 20-20 20H0l20-20z"/>
  </svg>
{%- endmacro -%}

{#- Define common attributes that we can use across all element types #}

{%- set commonAttributes %} class="{{ classNames }}" data-module="govuk-button" {{- govukAttributes(params.attributes) -}} {% if params.id %} id="{{ params.id }}"{% endif %}{% endset %}

{#- Actually create a button... or a link! #}

{%- if params.href %}
<a href="{{ params.href if params.href else '#' }}" role="button" draggable="false" {{- commonAttributes | safe }}>
  {{ params.html | safe | trim | indent(2) if params.html else params.text }}
  {{- _startIcon() | safe if params.isStartButton }}
</a>

{%- else %}
<button type="{{ params.type if params.type else 'submit' }}"
  {%- if params.value %} value="{{ params.value }}"{% endif %}
  {%- if params.name %} name="{{ params.name }}"{% endif %}
  {%- if params.disabled %} disabled aria-disabled="true"{% endif %}
  {%- if params.preventDoubleClick != undefined %} data-prevent-double-click="{{ params.preventDoubleClick | lower }}"{% endif %}
  {{- commonAttributes | safe }}>
  {{ params.html | safe | trim | indent(2) if params.html else params.text }}
  {{- _startIcon() | safe if params.isStartButton }}
</button>

{%- endif %}
{% endmacro %}