Class: AlMarimo::EmbedTag

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/al_marimo.rb

Overview

al_marimo_embed src="https://marimo.app/l/abc" height="600px" caption="..." %

Constant Summary collapse

ATTRIBUTES = 
/(\w+)\s*=\s*("[^"]*"|'[^']*'|[^\s]+)/.freeze

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, markup, options) ⇒ EmbedTag

Returns a new instance of EmbedTag.



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# File 'lib/al_marimo.rb', line 137

def initialize(tag_name, markup, options)
  super
  @attributes = {}
  markup.scan(ATTRIBUTES) do |key, value|
    @attributes[key] = value.gsub(/\A["']|["']\z/, "")
  end
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/al_marimo.rb', line 145

def render(context)
  site = context.registers[:site]
  return "" unless site

  src = resolve(@attributes["src"], context)
  url = AlMarimo.build_url(
    src,
    embed: @attributes.fetch("embed", "true") != "false",
    mode: @attributes["mode"] || "read"
  )
  # A missing or empty src is an authoring mistake. Emit nothing rather than
  # an iframe pointed at the site itself, which would silently render the
  # page inside its own post.
  return "" if url.nil?

  height = @attributes["height"] || "600px"
  width = @attributes["width"] || "100%"
  title = @attributes["title"] || "marimo notebook"
  caption = @attributes["caption"]
  extra_class = @attributes["class"]

  figure = +%(<figure class="al-marimo">)
  figure << %(<div class="al-marimo-embed">)
  figure << %(<iframe src="#{AlMarimo.escape(url)}")
  figure << %( class="#{AlMarimo.escape(extra_class)}") if extra_class
  # Deliberately omits allow-same-origin: the notebook is third-party code,
  # and granting it same-origin access to the embedding site would let it
  # read the parent document's storage and cookies.
  figure << %( sandbox="allow-scripts allow-downloads allow-popups allow-forms")
  figure << %( width="#{AlMarimo.escape(width)}" height="#{AlMarimo.escape(height)}")
  figure << %( title="#{AlMarimo.escape(title)}" loading="lazy" frameborder="0" allowfullscreen></iframe>)
  figure << %(</div>)
  figure << %(<figcaption class="caption">#{AlMarimo.escape(caption)}</figcaption>) if caption
  figure << %(</figure>)
  figure
end