Class: Gollum::Markup

Inherits:
Object
  • Object
show all
Defined in:
lib/gollum/markup.rb

Instance Method Summary collapse

Constructor Details

#initialize(page) ⇒ Markup

Initialize a new Markup object.

page - The Gollum::Page.

Returns a new Gollum::Markup object, ready for rendering.



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# File 'lib/gollum/markup.rb', line 14

def initialize(page)
  @wiki    = page.wiki
  @name    = page.filename
  @data    = page.text_data
  @version = page.version.id if page.version
  @format  = page.format
  @dir     = ::File.dirname(page.path)
  @tagmap  = {}
  @codemap = {}
  @texmap  = {}
  @premap  = {}
end

Instance Method Details

#check_cache(type, id) ⇒ Object

Hook for getting the formatted value of extracted tag data.

type - Symbol value identifying what type of data is being extracted. id - String SHA1 hash of original extracted tag data.

Returns the String cached formatted data, or nil.



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# File 'lib/gollum/markup.rb', line 419

def check_cache(type, id)
end

#extract_code(data) ⇒ Object

Extract all code blocks into the codemap and replace with placeholders.

data - The raw String data.

Returns the placeholder’d String data.



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# File 'lib/gollum/markup.rb', line 359

def extract_code(data)
  data.gsub!(/^``` ?([^\r\n]+)?\r?\n(.+?)\r?\n```\r?$/m) do
    id     = Digest::SHA1.hexdigest("#{$1}.#{$2}")
    cached = check_cache(:code, id)
    @codemap[id] = cached   ?
      { :output => cached } :
      { :lang => $1, :code => $2 }
    id
  end
  data
end

#extract_tags(data) ⇒ Object

Extract all tags into the tagmap and replace with placeholders.

data - The raw String data.

Returns the placeholder’d String data.



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# File 'lib/gollum/markup.rb', line 114

def extract_tags(data)
  data.gsub!(/(.?)\[\[(.+?)\]\]([^\[]?)/m) do
    if $1 == "'" && $3 != "'"
      "[[#{$2}]]#{$3}"
    elsif $2.include?('][')
      if $2[0..4] == 'file:'
        pre = $1
        post = $3
        parts = $2.split('][')
        parts[0][0..4] = ""
        link = "#{parts[1]}|#{parts[0].sub(/\.org/,'')}"
        id = Digest::SHA1.hexdigest(link)
        @tagmap[id] = link
        "#{pre}#{id}#{post}"
      else
        $&
      end
    else
      id = Digest::SHA1.hexdigest($2)
      @tagmap[id] = $2
      "#{$1}#{id}#{$3}"
    end
  end
  data
end

#extract_tex(data) ⇒ Object

Extract all TeX into the texmap and replace with placeholders.

data - The raw String data.

Returns the placeholder’d String data.



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# File 'lib/gollum/markup.rb', line 74

def extract_tex(data)
  data.gsub(/\\\[\s*(.*?)\s*\\\]/m) do
    tag = CGI.escapeHTML($1)
    id  = Digest::SHA1.hexdigest(tag)
    @texmap[id] = [:block, tag]
    id
  end.gsub(/\\\(\s*(.*?)\s*\\\)/m) do
    tag = CGI.escapeHTML($1)
    id  = Digest::SHA1.hexdigest(tag)
    @texmap[id] = [:inline, tag]
    id
  end
end

#find_file(name) ⇒ Object

Find the given file in the repo.

name - The String absolute or relative path of the file.

Returns the Gollum::File or nil if none was found.



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# File 'lib/gollum/markup.rb', line 322

def find_file(name)
  if name =~ /^\//
    @wiki.file(name[1..-1], @version)
  else
    path = @dir == '.' ? name : ::File.join(@dir, name)
    @wiki.file(path, @version)
  end
end

#find_page_from_name(cname) ⇒ Object

Find a page from a given cname. If the page has an anchor (#) and has no match, strip the anchor and try again.

cname - The String canonical page name.

Returns a Gollum::Page instance if a page is found, or an Array of

Gollum::Page, String extra

if a page without the extra anchor data

is found.



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# File 'lib/gollum/markup.rb', line 339

def find_page_from_name(cname)
  if page = @wiki.page(cname)
    return page
  end
  if pos = cname.index('#')
    [@wiki.page(cname[0...pos]), cname[pos..-1]]
  end
end

#parse_image_tag_options(tag) ⇒ Object

Parse any options present on the image tag and extract them into a Hash of option names and values.

tag - The String tag contents (the stuff inside the double brackets).

Returns the options Hash:

key - The String option name.
val - The String option value or true if it is a binary option.



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# File 'lib/gollum/markup.rb', line 250

def parse_image_tag_options(tag)
  tag.split('|')[1..-1].inject({}) do |memo, attr|
    parts = attr.split('=').map { |x| x.strip }
    memo[parts[0]] = (parts.size == 1 ? true : parts[1])
    memo
  end
end

#process_code(data) ⇒ Object

Process all code from the codemap and replace the placeholders with the final HTML.

data - The String data (with placeholders).

Returns the marked up String data.



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# File 'lib/gollum/markup.rb', line 377

def process_code(data)
  return data if data.nil? || data.size.zero? || @codemap.size.zero?

  blocks    = []
  @codemap.each do |id, spec|
    next if spec[:output] # cached

    code = spec[:code]
    if code.lines.all? { |line| line =~ /\A\r?\n\Z/ || line =~ /^(  |\t)/ }
      code.gsub!(/^(  |\t)/m, '')
    end

    blocks << [spec[:lang], code]
  end

  highlighted = begin
    blocks.map { |lang, code| Pygments.highlight(code, :lexer => lang) }
  rescue ::RubyPython::PythonError
    []
  end

  @codemap.each do |id, spec|
    body = spec[:output] || begin
      if (body = highlighted.shift.to_s).size > 0
        update_cache(:code, id, body)
        body
      else
        "<pre><code>#{CGI.escapeHTML(spec[:code])}</code></pre>"
      end
    end
    data.gsub!(id, body)
  end

  data
end

#process_file_link_tag(tag) ⇒ Object

Attempt to process the tag as a file link tag.

tag - The String tag contents (the stuff inside the double

brackets).

Returns the String HTML if the tag is a valid file link tag or nil

if it is not.



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# File 'lib/gollum/markup.rb', line 265

def process_file_link_tag(tag)
  parts = tag.split('|')
  return if parts.size.zero?

  name  = parts[0].strip
  path  = parts[1] && parts[1].strip
  path  = if path && file = find_file(path)
    ::File.join @wiki.base_path, file.path
  elsif path =~ %r{^https?://}
    path
  else
    nil
  end

  if name && path && file
    %{<a href="#{::File.join @wiki.base_path, file.path}">#{name}</a>}
  elsif name && path
    %{<a href="#{path}">#{name}</a>}
  else
    nil
  end
end

#process_image_tag(tag) ⇒ Object

Attempt to process the tag as an image tag.

tag - The String tag contents (the stuff inside the double brackets).

Returns the String HTML if the tag is a valid image tag or nil

if it is not.



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# File 'lib/gollum/markup.rb', line 175

def process_image_tag(tag)
  parts = tag.split('|')
  return if parts.size.zero?

  name  = parts[0].strip
  path  = if file = find_file(name)
    ::File.join @wiki.base_path, file.path
  elsif name =~ /^https?:\/\/.+(jpg|png|gif|svg|bmp)$/i
    name
  end

  if path
    opts = parse_image_tag_options(tag)

    containered = false

    classes = [] # applied to whatever the outermost container is
    attrs   = [] # applied to the image

    align = opts['align']
    if opts['float']
      containered = true
      align ||= 'left'
      if %w{left right}.include?(align)
        classes << "float-#{align}"
      end
    elsif %w{top texttop middle absmiddle bottom absbottom baseline}.include?(align)
      attrs << %{align="#{align}"}
    elsif align
      if %w{left center right}.include?(align)
        containered = true
        classes << "align-#{align}"
      end
    end

    if width = opts['width']
      if width =~ /^\d+(\.\d+)?(em|px)$/
        attrs << %{width="#{width}"}
      end
    end

    if height = opts['height']
      if height =~ /^\d+(\.\d+)?(em|px)$/
        attrs << %{height="#{height}"}
      end
    end

    if alt = opts['alt']
      attrs << %{alt="#{alt}"}
    end

    attr_string = attrs.size > 0 ? attrs.join(' ') + ' ' : ''

    if opts['frame'] || containered
      classes << 'frame' if opts['frame']
      %{<span class="#{classes.join(' ')}">} +
      %{<span>} +
      %{<img src="#{path}" #{attr_string}/>} +
      (alt ? %{<span>#{alt}</span>} : '') +
      %{</span>} +
      %{</span>}
    else
      %{<img src="#{path}" #{attr_string}/>}
    end
  end
end

#process_page_link_tag(tag) ⇒ Object

Attempt to process the tag as a page link tag.

tag - The String tag contents (the stuff inside the double

brackets).

Returns the String HTML if the tag is a valid page link tag or nil

if it is not.



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# File 'lib/gollum/markup.rb', line 295

def process_page_link_tag(tag)
  parts = tag.split('|')
  parts.reverse! if @format == :mediawiki

  name, page_name = *parts.compact.map(&:strip)
  cname = @wiki.page_class.cname(page_name || name)

  if name =~ %r{^https?://} && page_name.nil?
    %{<a href="#{name}">#{name}</a>}
  else
    presence    = "absent"
    link_name   = cname
    page, extra = find_page_from_name(cname)
    if page
      link_name = @wiki.page_class.cname(page.name)
      presence  = "present"
    end
    link = ::File.join(@wiki.base_path, CGI.escape(link_name))
    %{<a class="internal #{presence}" href="#{link}#{extra}">#{name}</a>}
  end
end

#process_tag(tag) ⇒ Object

Process a single tag into its final HTML form.

tag - The String tag contents (the stuff inside the double

brackets).

Returns the String HTML version of the tag.



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# File 'lib/gollum/markup.rb', line 159

def process_tag(tag)
  if html = process_image_tag(tag)
    html
  elsif html = process_file_link_tag(tag)
    html
  else
    process_page_link_tag(tag)
  end
end

#process_tags(data) ⇒ Object

Process all tags from the tagmap and replace the placeholders with the final markup.

data - The String data (with placeholders).

Returns the marked up String data.



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# File 'lib/gollum/markup.rb', line 146

def process_tags(data)
  @tagmap.each do |id, tag|
    data.gsub!(id, process_tag(tag))
  end
  data
end

#process_tex(data) ⇒ Object

Process all TeX from the texmap and replace the placeholders with the final markup.

data - The String data (with placeholders).

Returns the marked up String data.



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# File 'lib/gollum/markup.rb', line 94

def process_tex(data)
  @texmap.each do |id, spec|
    type, tex = *spec
    out = %{<img src="#{::File.join(@wiki.base_path, '_tex.png')}?type=#{type}&data=#{Base64.encode64(tex).chomp}" alt="#{CGI.escapeHTML(tex)}">}
    data.gsub!(id, out)
  end
  data
end

#render(no_follow = false) ⇒ Object

Render the content with Gollum wiki syntax on top of the file’s own markup language.

no_follow - Boolean that determines if rel=“nofollow” is added to all

<a> tags.

Returns the formatted String content.



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# File 'lib/gollum/markup.rb', line 34

def render(no_follow = false)
  sanitize = no_follow ?
    @wiki.history_sanitizer :
    @wiki.sanitizer

  data = extract_tex(@data.dup)
  data = extract_code(data)
  data = extract_tags(data)
  begin
    data = GitHub::Markup.render(@name, data)
    if data.nil?
      raise "There was an error converting #{@name} to HTML."
    end
  rescue Object => e
    data = %{<p class="gollum-error">#{e.message}</p>}
  end
  data = process_tags(data)
  data = process_code(data)
  if sanitize || block_given?
    doc  = Nokogiri::HTML::DocumentFragment.parse(data)
    doc  = sanitize.clean_node!(doc) if sanitize
    yield doc if block_given?
    data = doc.to_html
  end
  data = process_tex(data)
  data.gsub!(/<p><\/p>/, '')
  data
end

#update_cache(type, id, data) ⇒ Object

Hook for caching the formatted value of extracted tag data.

type - Symbol value identifying what type of data is being extracted. id - String SHA1 hash of original extracted tag data. data - The String formatted value to be cached.

Returns nothing.



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# File 'lib/gollum/markup.rb', line 429

def update_cache(type, id, data)
end