Class: YamlLinksToHtml

Inherits:
Object
  • Object
show all
Defined in:
lib/graphiclious/yaml-links2html.rb

Constant Summary collapse

DEL_ICIO_US_URL = 
"http://del.icio.us"
MAX_STYLES_IN_CLOUD = 
10
CLOUD_STYLES = 
(1..MAX_STYLES_IN_CLOUD).collect{ |size| 'cloud-' + size.to_s }

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ YamlLinksToHtml

Returns a new instance of YamlLinksToHtml.



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# File 'lib/graphiclious/yaml-links2html.rb', line 57

def initialize
  @include_private = false
  @write_only_diff_tags = true
  @diff_tags = Set.new
  @working_dir = Dir.getwd
  set_style(YamlLinksToHtml.guess_styles[0])
  set_user(YamlLinksToHtml.guess_users_within(@working_dir)[0])
  @link_to_delicious_if_possible = false
  @use_bundles = false
  @include_graph_views = false
  @build_graph_thumbs = @include_graph_views
  @num_files_written = 0
end

Instance Attribute Details

#build_graph_thumbs ⇒ Object

Returns the value of attribute build_graph_thumbs.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def build_graph_thumbs
  @build_graph_thumbs
end

#include_graph_views ⇒ Object

Returns the value of attribute include_graph_views.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def include_graph_views
  @include_graph_views
end

#include_private ⇒ Object

Returns the value of attribute include_private.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def include_private
  @include_private
end

#link_to_delicious_if_possible ⇒ Object

Returns the value of attribute link_to_delicious_if_possible.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def link_to_delicious_if_possible
  @link_to_delicious_if_possible
end

#use_bundles ⇒ Object

Returns the value of attribute use_bundles.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def use_bundles
  @use_bundles
end

#write_only_diff_tags ⇒ Object

Returns the value of attribute write_only_diff_tags.



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# File 'lib/graphiclious/yaml-links2html.rb', line 14

def write_only_diff_tags
  @write_only_diff_tags
end

Class Method Details

.guess_styles ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 21

def self.guess_styles
  guess_styles_within(STYLES_FOLDER)
end

.guess_styles_within(folder) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 25

def self.guess_styles_within(folder)
  Dir[File.join(folder, '*', 'dot-attributes.yaml')].collect {
    |filename|
    File.dirname(filename)
  }
end

.guess_users_within(folder) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 32

def self.guess_users_within(folder)
  Dir[File.join(folder, '*', 'delicious.yaml')].collect {
    |filename|
    File.dirname(filename)
  }
end

Instance Method Details

#check_prerequisites ⇒ Object

Lazy require things which some users won’t use



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# File 'lib/graphiclious/yaml-links2html.rb', line 17

def check_prerequisites
  require 'RMagick' if @build_graph_thumbs
end

#cloud_name_to_graph_name(cloud) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 357

def cloud_name_to_graph_name(cloud)
  UrlGraph.tag2file(cloud) + '__go'
end

#convert_to_thumbnail_filename(filename) ⇒ Object

name.extension will result in name.thumb.extension



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# File 'lib/graphiclious/yaml-links2html.rb', line 315

def convert_to_thumbnail_filename(filename)
  parts = filename.split('.')
  ext = parts.pop
  parts[0..-1].push('thumb').push(ext).join('.')
end

#copy_style_to_user ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 71

def copy_style_to_user
  ['dot-attributes.yaml', '*.jpg', '*.png', '*.gif', '*.css'].each do
    |pattern|
    Dir[File.join(@style, pattern)].each do
      |template_file|
      write_line_on_protokol("Copy #{template_file} to #{@user}")
      File.copy(template_file, File.join(@working_dir, @user)) 
    end
  end
end

#delicious_tag_url(tag1, *other_tags) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 118

def delicious_tag_url(tag1, *other_tags)
  url = "#{DEL_ICIO_US_URL}/tag/#{tag1}"
  other_tags.each { |tag| url = "#{url}+#{tag}" }
  url + '?settagview=cloud'
end

#delicious_user_url(tag1, *other_tags) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 124

def delicious_user_url(tag1, *other_tags)
  url = "#{DEL_ICIO_US_URL}/#{@user}/#{tag1}"
  other_tags.each { |tag| url = "#{url}+#{tag}" }
  url + '?settagview=cloud'
end

#do_graphviz(tag_graph, cloud_name) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 321

def do_graphviz(tag_graph, cloud_name)
  return unless @include_graph_views
  name = cloud_name_to_graph_name(cloud_name)
  # Write Graphviz-File
  tmpDotFile = 'graph.dot~'
  tag_graph.print_dotted_on_file(tmpDotFile)
  write_line_on_protokol "Wrote #{tmpDotFile} for temporary use, feel free to delete later."
  
  # Use Graphviz to create HTML with client-side imagemap
  os_gif_file = os_file_join(@html_output_path, "#{name}.gif")
  dot_command = "dot -Tgif #{tmpDotFile} -o #{os_gif_file}" 
  system(dot_command) || fatal("Error can't execute #{dot_command}\nPlease check your graphviz installation")
  write_line_on_protokol "Wrote #{os_gif_file}."
  graph_htm = File.join(@html_output_path, "#{name}.htm")
  os_graph_htm = os_file_join(@html_output_path, "#{name}.htm")
  File.open(graph_htm, 'w') { |fp|
    write_html_head_on(fp)
    fp.puts("<h1>Tag graph: #{cloud_name} </h1>")
    link_index_on(fp, '', @bundles)
    fp.puts '<div class="main">'
    fp.puts '<IMG SRC="' + "#{name}.gif" + '" USEMAP=#UrlGraph>'
    fp.puts '</div>'
  }
  dot_command = "dot -Tcmapx #{tmpDotFile} -o graph.htm~"
  system(dot_command) || fatal("Failed system call: #{dot_command}")
  File.open(graph_htm, 'a') { |fp|
    File.open('graph.htm~'){ |fp2| fp2.each_line { |line| fp.puts(line) }}
    write_html_tail_on(fp)
  }
  write_line_on_protokol "Wrote #{os_graph_htm} (which uses #{os_gif_file})."
  
  return unless @build_graph_thumbs
  gif_file = File.join(@html_output_path, "#{name}.gif")
  thumbnail(gif_file)
end

#downscale(val) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 103

def downscale(val)
  (2 * Math.log(val)).round
end

#fatal(msg) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 301

def fatal(msg)
  write_line_on_protokol(msg)
  exit(1)
end

#get_cloud_style(val, maxval) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 107

def get_cloud_style(val, maxval)
  quot = downscale(maxval) 
  quot = 1 if quot == 0
  index = (MAX_STYLES_IN_CLOUD - 1) * downscale(val) / quot
  if(index >= MAX_STYLES_IN_CLOUD)
    puts "Corrected index of cloud style for #{val} from #{index} to #{MAX_STYLES_IN_CLOUD}"
    index = MAX_STYLES_IN_CLOUD      
  end
  CLOUD_STYLES[index]
end

#init_tag_graph ⇒ Object

create an empty graph with dot attributes of chosen style



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# File 'lib/graphiclious/yaml-links2html.rb', line 222

def init_tag_graph
  @tag_graph = UrlGraph.new
  if File.exists?(@dot_attribut_file)
    @tag_graph.fixed_dot_attributes = File.open(@dot_attribut_file, 'r') { |io|
      YAML.load(io)
    }
  else
    # write out the default-attribute-file to make
    # things easy to configure
    File.open(@dot_attribut_file, 'w') { |out|
      YAML.dump(@tag_graph.fixed_dot_attributes, out)
    }
    write_line_on_protokol "Wrote #{@dot_attribut_file}, change to adopt different style."
  end
end

#link_index_on(fp, id = 'none', bundles = {}) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 151

def link_index_on(fp, id='none', bundles={})
  fp.puts '<div class="mainmenu">'|| @checkBundles.checked?
  fp.puts menuitem('cloud (all)', id, 'index.htm')
  unless bundles.empty?
    bundles.keys.sort.each do
      |bundle|
      unless bundle == 'unbundled'
        fp.puts menuitem(bundle, id, "bundle_#{bundle}.htm")
      end
    end
    unless bundles['unbundled'].empty?
      fp.puts menuitem('unbundled', id, "bundle_unbundled.htm") 
    end
  end
  fp.puts '</div>'
end

#load_links ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 238

def load_links
  if(@write_only_diff_tags)
    @diff_tags = Set.new
    diff = File.open(@diff_file, 'r') { |io| YAML.load(io) }
    diff.keys.each { |k|
      diff[k]['tags'].each {|t| @diff_tags.add(t) }
    }
  end
  
  # load yaml-file containing links as a hash
  cache = File.open(@input_file, 'r') { |io|
    YAML.load(io)
  }
  links = cache.values
  unless(@include_private)
    links = links.reject { |l| l['shared'] =~ /no/ }
  end
  @links_by_tag = Hash.new
  @links_by_edge = Hash.new
  links.each do
    |link|
    tagsOfLink = link['tags'].reject { |t| t =~ /^for:/ }
    link['tags'] = tagsOfLink
    n = tagsOfLink.size - 1
    (0..n).each do
      |i|
      tag = tagsOfLink[i]
      unless @links_by_tag.has_key?(tag)
        @links_by_tag[tag] = Array.new
        @tag_graph.add_vertex(tag)
      end
      @links_by_tag[tag].push(link)
      (i+1..n).each do
        |j|
        otherTag = tagsOfLink[j]
        # write_line_on_protokol "\t#{tag}<->#{otherTag}"
        @tag_graph.add_edge(tag, otherTag)
        edge_name = UrlGraph.edge_name(tag, otherTag)
        unless @links_by_edge.has_key?(edge_name)
          @links_by_edge[edge_name] = Array.new
        end
        @links_by_edge[edge_name].push(link)
      end
    end
  end
  
  # load bundles file
  @bundles = {}
  if @use_bundles
    @bundles = File.open(@bundles_file, 'r') { |io|
      YAML.load(io)
    }
    set_of_unbundled_tags = {}
    @tag_graph.each { |tag| set_of_unbundled_tags[tag] = tag }
    @bundles.keys.each { |bundle|
      @bundles[bundle].each { |tag|
        set_of_unbundled_tags.delete(tag)
      }
    }
    @bundles['unbundled'] = set_of_unbundled_tags.values.sort
  end
end

#menuitem(name, id, url) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 143

def menuitem(name, id, url)
  if(name == id)
    "<div class=\"menuselected\">#{name}</div>"
  else
    "<div class=\"menuitem\"><a href=\"#{url}\">#{name}</a></div>"
  end
end

#os_file_join(dir, file) ⇒ Object

methods for html-generation



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# File 'lib/graphiclious/yaml-links2html.rb', line 95

def os_file_join(dir, file)
  if RUBY_PLATFORM =~ /win32/
    File.join(dir, file).gsub(File::SEPARATOR, "\\")
  else
    File.join(dir, file)
  end
end

#reset_build_state ⇒ Object

make all run-variables garbage collectable



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# File 'lib/graphiclious/yaml-links2html.rb', line 466

def reset_build_state
  @tag_graph = nil
  @links_by_tag = nil
  @links_by_edge = nil
  @bundles = nil
  @num_files_written = 0
end

#run ⇒ Object

run the complete batch



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# File 'lib/graphiclious/yaml-links2html.rb', line 475

def run
  unless File.exists?(@input_file)
    raise "Missing input file #{@input_file}"
  end
  check_prerequisites
  Dir.mkdir(@html_output_path) unless File.directory?(@html_output_path)
  copy_style_to_user unless @user == @style
  init_tag_graph
  load_links
  write_all_overviews
  write_single_tag_files    
  write_double_tag_files
  write_line_on_protokol "#{@num_files_written.to_s} Files witten to #{@html_output_path}."
  reset_build_state
  write_line_on_protokol "Finished."
end

#set_protocol_block(aProc) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 82

def set_protocol_block(aProc)
  @protocol_block = aProc
end

#set_style(style) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 52

def set_style style
  @style = style
  @dot_attribut_file = "#{@style}/dot-attributes.yaml"
end

#set_user(user) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 44

def set_user(user)
  @user = user
  @input_file = File.join(@working_dir, @user, 'delicious.yaml')
  @diff_file = File.join(@working_dir, @user, 'delicious.diff.yaml')
  @html_output_path = File.join(@working_dir, @user, 'html')
  @bundles_file = File.join(@working_dir, @user, 'bundles.yaml')
end

#set_working_dir(new_working_dir) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 39

def set_working_dir(new_working_dir)
  @working_dir = new_working_dir
  set_user(@user)
end

#sorted_links(links) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 200

def sorted_links(links)
  links.sort { |l1, l2| l1['description'] <=> l2['description'] }
end

#thumbnail(filename) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 306

def thumbnail(filename)
  thumb_name = convert_to_thumbnail_filename(filename)
  write_line_on_protokol("Writing thumbnail #{thumb_name} for #{filename}")
  img = Magick::Image.read(filename)[0]
  thumb = img.thumbnail(100, 100)
  thumb.write(thumb_name)
end

#write_all_overviews ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 361

def write_all_overviews
  # Create a file containing a cloud of all tags
  list = @links_by_tag.keys.sort
  filename = 'index.htm'
  cloud_name = 'cloud (all)'
  write_overview(filename, cloud_name, list, @bundles, @links_by_tag)
  do_graphviz(@tag_graph, cloud_name)
  
  # The same for all bundles
  @bundles.keys.each do 
    | bundle |
    list = @bundles[bundle]
    filename = "bundle_#{bundle}.htm"
    cloud_name = bundle
    write_overview(filename, cloud_name, list, @bundles, @links_by_tag)
    @tag_graph.filter_set = Set.new(list)
    do_graphviz(@tag_graph, cloud_name)
    @tag_graph.filter_set = nil
  end
end

#write_double_tag_files ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 428

def write_double_tag_files
  # Create one Html-File for each edge between two tags
  @tag_graph.each_edge do
    |tag1,tag2|
    if !@write_only_diff_tags or (@diff_tags.include?(tag1) and @diff_tags.include?(tag2))
      edge_name = UrlGraph.edge_name(tag1, tag2)
      edge_url = UrlGraph.edge_url(tag1, tag2)
      File.open(File.join(@html_output_path, edge_url), 'w') do
        |fp|
        write_html_head_on(fp)
        fp.puts "<h1>Tags: #{tag1} AND #{tag2}</h1>"
        link_index_on(fp, 'none', @bundles)
        fp.puts '<div class="main">'
        ankor1 = UrlGraph.node_ankor(tag1)
        ankor2 = UrlGraph.node_ankor(tag2)
        fp.puts "<h3>Links for tag combination #{ankor1}/#{ankor2}</h3>"
        fp.puts '<ul>'
        sorted_links(@links_by_edge[edge_name]).each do
          |link|
          fp.puts('<li>')
          write_link_on(link, fp, [tag1, tag2])
          fp.puts('<br></li>')
        end
        fp.puts '</ul>'
        if @link_to_delicious_if_possible
          fp.puts("<h3>#{UrlGraph.ankor(DEL_ICIO_US_URL, 'del.icio.us')} links with tag combination #{ankor1}/#{ankor2}</h3>")
          fp.puts(UrlGraph.ankor(delicious_user_url(tag1, tag2), @user))
          fp.puts(UrlGraph.ankor(delicious_tag_url(tag1, tag2), 'all'))
        end
        fp.puts '</div>'
        write_html_tail_on(fp)
      end
    end
  end
  write_line_on_protokol "Wrote one html-file for each combination of two tags."
end

#write_html_head_on(fp) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 130

def write_html_head_on(fp)
  fp.puts '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">'
  fp.puts '<html><head>'
  fp.puts '<meta http-equiv="content-type" content="text/html; charset=UTF-8">'
  fp.puts '<link rel="stylesheet" type="text/css" href="../style.css">'
  fp.puts '</head><body>'
end

#write_html_tail_on(fp) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 138

def write_html_tail_on(fp)
  fp.puts '</body></html>'
  @num_files_written = @num_files_written + 1
end

#write_line_on_protokol(lineString) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 86

def write_line_on_protokol(lineString)
  puts lineString
  unless @protocol_block.nil?
    @protocol_block.call(lineString)
  end
end

#write_link_on(link, fp, skip_tags = []) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 204

def write_link_on(link, fp, skip_tags = [])
  fp.puts(UrlGraph.ankor(link['href'], link['description']))
  info = link['extended']
  unless info.nil? || info.empty?
    fp.puts('<br>')
    fp.puts("#{info}")
  end
  other_tags = link['tags'].reject { |t| skip_tags.include?(t) }
  unless other_tags.empty?
    fp.puts('<br>')
    fp.puts('More tags: ')
    other_tags.each { |t|
      fp.puts(UrlGraph.node_ankor(t))
    }
  end
end

#write_overview(filename, cloud_name, list, bundles, links_by_tag) ⇒ Object 



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# File 'lib/graphiclious/yaml-links2html.rb', line 168

def write_overview(filename, cloud_name, list, bundles, links_by_tag)
  valid_list = list.reject { |tag|
    links_by_tag[tag].nil? # doesn't make sense but seems to be possible
  }
  File.open(File.join(@html_output_path, filename), 'w') do
    | fp |
    write_html_head_on(fp)
    fp.puts "<h1>Tag overview: #{cloud_name}</h1>"
    link_index_on(fp, cloud_name, bundles)
    fp.puts '<div class="main">'
    fp.puts "<h3>Tags, size representing number of links</h3>"
    max_num_links = valid_list.collect{ |tag| links_by_tag[tag].size }.max
    valid_list.each do
      |tag|
      style = get_cloud_style(links_by_tag[tag].size, max_num_links)
      fp.puts(UrlGraph.node_ankor(tag, style))
    end
    if(@include_graph_views)
      name = cloud_name_to_graph_name(cloud_name)
      fp.puts "<h3>Graph of tag relations</h3>"
      
      link_desc = if(@build_graph_thumbs)
        "<img src=\"#{convert_to_thumbnail_filename(name + '.gif')}\">"
      else
        'view it'
      end 
      fp.puts "<a href=\"#{name}.htm\">#{link_desc}</a>"
      fp.puts '</div>'
    end 
  end
end

#write_single_tag_files ⇒ Object

Create one Html-File for each tag



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# File 'lib/graphiclious/yaml-links2html.rb', line 383

def write_single_tag_files
  @links_by_tag.keys.sort.each do
    |tag|
    if !@write_only_diff_tags or @diff_tags.include?(tag)
      File.open(File.join(@html_output_path, UrlGraph.node_url(tag)), 'w') do
        |fp|
        write_html_head_on(fp)
        fp.puts "<h1>Tag: #{tag}</h1>"
        link_index_on(fp, 'none', @bundles)
        fp.puts '<div class="main">'
        fp.puts "<h3>Subcategories for tag #{tag}</h3>"
        subcloud = @tag_graph.adjacent_vertices(tag).sort
        max_num_links = subcloud.collect{ |n| @links_by_edge[UrlGraph.edge_name(tag, n)].size }.max
        subcloud.each do
          |neighbor|
          edge_name = UrlGraph.edge_name(tag, neighbor)
          edgePage = UrlGraph.edge_url(tag, neighbor)
          style = get_cloud_style(@links_by_edge[edge_name].size, max_num_links)
          fp.puts(UrlGraph.intern_ankor(UrlGraph.edge_url(tag, neighbor), neighbor, style))
        end
        list = @links_by_tag[tag].select { |l| l['tags'].size == 1 }
        unless list.empty?
          fp.puts("<h3>Links with the single tag #{tag}</h3>")
          fp.puts('<ul>')
          sorted_links(list).each do
            |link|
            fp.puts('<li>')
            write_link_on(link, fp, [tag])
            fp.puts('</li>')
          end
          fp.puts('</ul>')
        end
        if @link_to_delicious_if_possible
          fp.puts("<h3>#{UrlGraph.ankor(DEL_ICIO_US_URL, 'del.icio.us')} links with tag #{tag}</h3>")
          fp.puts(UrlGraph.ankor(delicious_user_url(tag), "#{@user}"))
          fp.puts(UrlGraph.ankor(delicious_tag_url(tag), "all"))
        end
        fp.puts '</div>'
        write_html_tail_on(fp)
      end
    end
  end
  write_line_on_protokol "Wrote one html-file for each tag."
end