Class: Codex::Content

Inherits:
Object
  • Object
show all
Defined in:
lib/codex/content.rb

Defined Under Namespace

Classes: Descriptor

Constant Summary collapse

START_SLIDE = 
%{<div class="slide">\n}
END_SLIDE = 
%{</div>\n}
BETWEEN_SLIDES = 
END_SLIDE + "\n" + START_SLIDE
CODE_PATTERN = 
/^:code\s+(.+)/
INCLUDED_CODE_PREFIX =

Temporarily prepended to lines of incldued code to stop them being processed as Textfile

"XXX\001"
INCLUDED_CODE_PREFIX_REGEXP = 
/#{INCLUDED_CODE_PREFIX}/mo

Instance Method Summary collapse

Constructor Details

#initialize(original) ⇒ Content

Returns a new instance of Content.



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# File 'lib/codex/content.rb', line 57

def initialize(original)
  @original = original.sub(/__END__.*/m, '').gsub(/__SKIP__.*?__ENDSKIP__/m, '')
end

Instance Method Details

#find_content_from(desc) ⇒ Object 



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# File 'lib/codex/content.rb', line 119

def find_content_from(desc)
  begin
    content = File.read(desc.file_name)
  rescue   Exception => e
    STDERR.puts e.message
    exit 2
  end

 find_part_in(content, desc.part)
end

#find_part_in(content, part_name) ⇒ Object 



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# File 'lib/codex/content.rb', line 130

def find_part_in(content, part_name)
  result = []
  state = part_name ? :skipping : :normal
  content.each_line do |line|
    if line.sub!(/(START|END):(\w+)/, '')
      if $2 == part_name
        if $1 == "START"
          state = :normal
        else
          state = :skipping
        end
      end
      next
    end
    result << line unless state == :skipping
  end
  result.join
end

#format_code(desc, code) ⇒ Object 



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# File 'lib/codex/content.rb', line 149

def format_code(desc, code)
  code = code.gsub(/^/m, INCLUDED_CODE_PREFIX)
  %{<div class="#{desc.css_class}">\n} +
  %{\n<pre name="code" class="#{desc.lang}:nogutter:nocontrols">#{code}} +
  %{</pre></div>} +
  %{<div class="codeurl"><a href="txmt://open?url=file://#{File.expand_path(desc.file_name)}">#{desc.file_name}</a></div>\n\n}
end

#preprocess_code(text) ⇒ Object

look for :code filename and substitute in the appropriate part of the given file. Do in two steps because the regexp engine isn;t reentrant



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# File 'lib/codex/content.rb', line 71

def preprocess_code(text)
  chunks = {}
  text.scan(CODE_PATTERN) do |file,|
    desc = Descriptor.new(file)
    chunks[file] = find_content_from(desc)
  end
  text.gsub(CODE_PATTERN) { file = $1.dup; format_code(Descriptor.new(file), chunks[file]) }
end

#preprocess_inlinecode(text) ⇒ Object

Look for :inlinecode /…/:endinlinecode and substitute in as if it came from a file



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# File 'lib/codex/content.rb', line 81

def preprocess_inlinecode(text)
  state = :copying
  result = []
  text.split(/\n/).each do |line|
    case state
    when :copying
      if line =~ /^:inlinecode(.*)/
        args = $1.strip
        desc = Descriptor.new("--[#{args}]")
        result << %{<div class="#{desc.css_class}">\n}
        result << %{\n<pre name="code" class="#{desc.lang}:nogutter:nocontrols">\n}
        state = :incode
      else
        result << line
      end
    when :incode
      if line =~ /^:endinlinecode/
        result << "</pre></div>\n\n"
        state = :copying
      else
        result << INCLUDED_CODE_PREFIX + line
      end
    end
  end

  result.join("\n")
end

#remove_code_escaping_from(html) ⇒ Object 



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# File 'lib/codex/content.rb', line 157

def remove_code_escaping_from(html)
  html.gsub(INCLUDED_CODE_PREFIX_REGEXP, '')
end

#split_into_slides(textile) ⇒ Object 



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# File 'lib/codex/content.rb', line 109

def split_into_slides(textile)
  result = []
  slides = textile.split(/^h1/).each do |slide|
    unless slide.empty?
      result << START_SLIDE << "\nh1" << slide << END_SLIDE
    end
  end
  result.join
end

#to_html ⇒ Object 



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# File 'lib/codex/content.rb', line 61

def to_html
  textile = preprocess_inlinecode(@original)
  textile = preprocess_code(textile)
  content = split_into_slides(textile)
  html = RedCloth.new(content).to_html
  remove_code_escaping_from(html)
end