Class: JekyllPDFEmbed

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/jekyll-pdf-embed/pdf-tag.rb

Constant Summary collapse 

'no_link'

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, content, tokens) ⇒ JekyllPDFEmbed

Returns a new instance of JekyllPDFEmbed.



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# File 'lib/jekyll-pdf-embed/pdf-tag.rb', line 10

def initialize(tag_name, content, tokens)
    super
    @content = content

    # define allowed extensions
    @allowed_files = %w[.pdf .ppt .pptx]

    # current container uuid
    @uuid = SecureRandom.uuid
end

Instance Method Details

#hash_from_args(args_array) ⇒ Object

Transform ‘a=b c=d’ into hash



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# File 'lib/jekyll-pdf-embed/pdf-tag.rb', line 78

def hash_from_args(args_array)
    keys_values = args_array.map { |item| item.split(/\s*=\s*/) }
    Hash[keys_values]
end

#render(context) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/jekyll-pdf-embed/pdf-tag.rb', line 21

def render(context)
    @parsed_content = Liquid::Template.parse(@content).render(context)
    @args = @parsed_content.split(/ /)

    @link_raw = @args.first
    @link = @link_raw.tr('\"', '')

    @no_link = @args.include? NO_LINK_ARG
    @extension = File.extname(@link)
    @is_allowed = @allowed_files.include? @extension

    @other_args_raw = @parsed_content.clone
    @other_args_raw.slice! @link_raw
    @other_args_raw.slice! NO_LINK_ARG
    @other_args_raw.strip!

    @other_args_array = @other_args_raw.split(/ /)

    @other_args = hash_from_args(@other_args_array)
    @width = @other_args['width']
    @height = @other_args['height']

    # default width and height values
    @width = '100%' if @width.nil?
    @height = '650px' if @height.nil?

    raise ArgumentError, "ERROR:file_not_allowed -> #{@link}" unless @is_allowed

    @label = ''

    case @extension
    when '.pdf'
        @label = 'View PDF'
    when '.ppt', '.pptx'
        @label = 'View presentation'
        # checks if the presentation is not on remote address
        if !@link.include? 'http://' and !@link.include? 'https://'
            # get base url and append file location to it
            @baseurl = context.registers[:site].config['url'].to_s
            @link = "https://view.officeapps.live.com/op/embed.aspx?src=#{@baseurl}#{@link}"
            # locally, this will not work
            # but once the Jekyll site is hosted remotely, the baseurl will not be 'localhost'
        else
            @link = "https://view.officeapps.live.com/op/embed.aspx?src=#{@link}"
        end
    else
        raise ArgumentError, "ERROR:extension_not_recognized -> #{@extension} for link -> #{@link}"
    end

    if @no_link
        %Q(<style> .pdf-embed-wrap-#{@uuid} { display:flex; flex-direction: column; width: #{@width}; height: #{@height}; } .pdf-embed-container-#{@uuid} { height: 100%; } .pdf-embed-container-#{@uuid} iframe { width: 100%; height: 100%; } </style> <div class="pdf-embed-wrap-#{@uuid}"> <div class="pdf-embed-container-#{@uuid}"> <iframe src="#{@link}" frameborder="0" allowfullscreen></iframe> </div> </div>)
    else
        %Q(<style> .pdf-embed-wrap-#{@uuid} { display:flex; flex-direction: column; width: #{@width}; height: #{@height}; } .pdf-embed-container-#{@uuid} { height: 100%; } .pdf-link-#{@uuid} { background-color: white; text-align: center; border-style: solid; } .pdf-embed-container-#{@uuid} iframe { width: 100%; height: 100%; } </style> <div class="pdf-embed-wrap-#{@uuid}"> <div class="pdf-link-#{@uuid}"> <a href="#{@link}" target="_blank">#{@label}</a> </div> <div class="pdf-embed-container-#{@uuid}"> <iframe src="#{@link}" frameborder="0" allowfullscreen></iframe> </div> </div>)
    end
end