web/_includes/refactor-content.html

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<!-- Refactor the HTML structure -->
{% assign _content = include.content %}
<!--
In order to allow a wide table to scroll horizontally,
we suround the markdown table with `<div class="table-wrapper">` and `</div>`
-->
{% if _content contains '<table' %}
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{% assign _content = _content
| replace: '<table', '<div class="table-wrapper"><table'
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| replace: '</table>', '</table></div>'
| replace: '<code><div class="table-wrapper">', '<code>'
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| replace: '</table></div></code>', '</table></code>'
%}
{% endif %}
<!--
Fixed kramdown code highlight rendering:
https://github.com/penibelst/jekyll-compress-html/issues/101
https://github.com/penibelst/jekyll-compress-html/issues/71#issuecomment-188144901
-->
{% if _content contains '<pre class="highlight">' %}
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{% assign _content = _content
| replace: '<div class="highlight"><pre class="highlight"><code', '<div class="highlight"><code'
| replace: '</code></pre></div>', '</code></div>'
%}
{% endif %}
<!-- Change the icon of checkbox -->
{% if _content contains '<input type="checkbox"' %}
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{% assign _content = _content
| replace: '<input type="checkbox" class="task-list-item-checkbox" disabled="disabled" checked="checked" />',
'<i class="fas fa-check-circle fa-fw checked"></i>'
| replace: '<input type="checkbox" class="task-list-item-checkbox" disabled="disabled" />',
'<i class="far fa-circle fa-fw"></i>'
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%}
{% endif %}
<!-- Handle images -->
{% assign IMG_TAG = '<img ' %}
{% if _content contains IMG_TAG %}
{% assign _img_content = null %}
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{% assign _img_snippets = _content | split: IMG_TAG %}
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{% for _img_snippet in _img_snippets %}
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{% if forloop.first %}
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{% assign _img_content = _img_snippet %}
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{% continue %}
{% endif %}
{% assign _left = _img_snippet | split: '>' | first %}
{% assign _right = _img_snippet | remove: _left %}
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{% unless _left contains 'src=' %}
{% continue %}
{% endunless %}
{% assign _left = _left | remove: ' /' | replace: ' w=', ' width=' | replace: ' h=', ' height=' %}
{% assign _attrs = _left | split: '" ' %}
{% assign _src = null %}
{% assign _lqip = null %}
{% assign _class = null %}
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{% for _attr in _attrs %}
{% unless _attr contains '=' %}
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{% continue %}
{% endunless %}
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{% assign _pair = _attr | split: '="' %}
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{% capture _key %}{{ _pair | first }}{% endcapture %}
{% capture _value %}{{ _pair | last | remove: '"' }}{% endcapture %}
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{% case _key %}
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{% when 'src' %}
{% assign _src = _value %}
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{% when 'lqip' %}
{% assign _lqip = _value %}
{% when 'class' %}
{% assign _class = _value %}
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{% endcase %}
{% endfor %}
<!-- take out classes -->
{% if _class %}
{% capture _old_class %}class="{{ _class }}"{% endcapture %}
{% assign _left = _left | remove: _old_class %}
{% endif %}
{% assign _final_src = null %}
{% assign _lazyload = true %}
{%- capture _img_url -%}
{% include img-url.html src=_src img_path=page.img_path %}
{%- endcapture -%}
{% assign _path_prefix = _img_url | remove: _src %}
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{% unless _src contains '//' %}
{% assign _final_src = _path_prefix | append: _src %}
{% assign _src_alt = 'src="' | append: _path_prefix %}
{% assign _left = _left | replace: 'src="', _src_alt %}
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{% endunless %}
{% if _lqip %}
{% assign _lazyload = false %}
{% assign _class = _class | append: ' blur' %}
{% unless _lqip contains 'data:' %}
{% assign _lqip_alt = 'lqip="' | append: _path_prefix %}
{% assign _left = _left | replace: 'lqip="', _lqip_alt %}
{% endunless %}
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<!-- add image placeholder -->
{% assign _left = _left | replace: 'src=', 'data-src=' | replace: ' lqip=', ' data-lqip="true" src=' %}
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{% else %}
{% assign _class = _class | append: ' shimmer' %}
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{% endif %}
<!-- lazy-load images -->
{% if _lazyload %}
{% assign _left = _left | append: ' loading="lazy"' %}
{% endif %}
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{% if page.layout == 'home' %}
<!-- create the image wrapper -->
{% assign _wrapper_start = '<div class="preview-img ' | append: _class | append: '">' %}
{% assign _img_content = _img_content | append: _wrapper_start %}
{% assign _right = _right | prepend: '></div' %}
{% else %}
<!-- make sure the `<img>` is wrapped by `<a>` -->
{% assign _parent = _right | slice: 1, 4 %}
{% if _parent == '</a>' %}
<!-- add class to exist <a> tag -->
{% assign _size = _img_content | size | minus: 1 %}
{% capture _class %}
class="img-link{% unless _lqip %} shimmer{% endunless %}"
{% endcapture %}
{% assign _img_content = _img_content | slice: 0, _size | append: _class | append: '>' %}
{% else %}
<!-- create the image wrapper -->
{% assign _wrapper_start = _final_src
| default: _src
| prepend: '<a href="'
| append: '" class="popup img-link '
| append: _class
| append: '">'
%}
{% assign _img_content = _img_content | append: _wrapper_start %}
{% assign _right = '></a' | append: _right %}
{% endif %}
{% endif %}
<!-- combine -->
{% assign _img_content = _img_content | append: IMG_TAG | append: _left | append: _right %}
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{% endfor %}
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{% if _img_content %}
{% assign _content = _img_content %}
{% endif %}
{% endif %}
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<!-- Add header for code snippets -->
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{% if _content contains '<div class="highlight"><code>' %}
{% assign _code_spippets = _content | split: '<div class="highlight"><code>' %}
{% assign _new_content = '' %}
{% for _snippet in _code_spippets %}
{% if forloop.last %}
{% assign _new_content = _new_content | append: _snippet %}
{% else %}
{% assign _left = _snippet | split: '><' | last %}
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{% if _left contains 'file="' %}
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{% assign _label_text = _left | split: 'file="' | last | split: '"' | first %}
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{% assign _label_icon = 'far fa-file-code fa-fw' %}
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{% else %}
{% assign _lang = _left | split: 'language-' | last | split: ' ' | first %}
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{% capture _label_text %}{% include language-alias.html language=_lang %}{% endcapture %}
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{% assign _label_icon = 'fas fa-code fa-fw small' %}
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{% endif %}
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{% capture _label %}
<span data-label-text="{{ _label_text | strip }}"><i class="{{ _label_icon }}"></i></span>
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{% endcapture %}
{% assign _new_content = _new_content
| append: _snippet
| append: '<div class="code-header">'
| append: _label
| append: '<button aria-label="copy" data-title-succeed="'
| append: site.data.locales[include.lang].post.button.copy_code.succeed
| append: '"><i class="far fa-clipboard"></i></button></div>'
| append: '<div class="highlight"><code>'
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%}
{% endif %}
{% endfor %}
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{% assign _content = _new_content %}
{% endif %}
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<!-- Create heading anchors -->
{% assign heading_levels = '2,3,4,5' | split: ',' %}
{% assign _heading_content = _content %}
{% for level in heading_levels %}
{% assign mark_start = '<h' | append: level | append: ' id="' %}
{% assign mark_end = '</h' | append: level | append: '>' %}
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{% if _heading_content contains mark_start %}
{% assign _new_content = null %}
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{% assign heading_snippets = _heading_content | split: mark_start %}
{% for snippet in heading_snippets %}
{% if forloop.first %}
{% assign _new_content = snippet %}
{% continue %}
{% endif %}
{% assign id = snippet | split: '"' | first %}
{% assign anchor = '<a href="#'
| append: id
| append: '" class="anchor text-muted"><i class="fas fa-hashtag"></i></a>'
%}
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{% assign left = snippet | split: mark_end | first %}
{% assign right = snippet | slice: left.size, snippet.size %}
{% assign left = left | replace_first: '">', '"><span class="me-2">' | append: '</span>' %}
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{% assign _new_content = _new_content | append: mark_start | append: left | append: anchor | append: right %}
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{% endfor %}
{% assign _heading_content = _new_content %}
{% endif %}
{% endfor %}
{% assign _content = _heading_content %}
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<!-- return -->
{{ _content }}