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Class: RDoc::Generator::JsonIndex

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, ::RDoc::Text
Inherits: Object
Defined in: lib/rdoc/generator/json_index.rb

Overview

The JsonIndex generator is designed to complement an HTML generator and produces a JSON search index. This generator is derived from sdoc by Vladimir Kolesnikov and contains verbatim code written by him.

This generator is designed to be used with a regular HTML generator:

class RDoc::Generator::Darkfish
  def initialize options
    # ...
    @base_dir = Pathname.pwd.expand_path

    @json_index = RDoc::Generator::JsonIndex.new self, options
  end

  def generate
    # ...
    @json_index.generate
  end
end

Index Format

The index is output as a JSON file assigned to the global variable search_data. The structure is:

var search_data = {
  "index": {
    "searchIndex":
      ["a", "b", ...],
    "longSearchIndex":
      ["a", "a::b", ...],
    "info": [
      ["A", "A", "A.html", "", ""],
      ["B", "A::B", "A::B.html", "", ""],
      #...
    ]
  }
}

The same item is described across the searchIndex, longSearchIndex and info fields. The searchIndex field contains the item’s short name, the longSearchIndex field contains the full_name (when appropriate) and the info field contains the item’s name, full_name, path, parameters and a snippet of the item’s comment.

LICENSE

Copyright © 2009 Vladimir Kolesnikov

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Constant Summary

::RDoc::Text - Included

MARKUP_FORMAT, SPACE_SEPARATED_LETTER_CLASS, TO_HTML_CHARACTERS

Class Method Summary

Instance Attribute Summary

  • #index readonly Internal use only

::RDoc::Text - Included

#language

The language for this text.

Instance Method Summary

::RDoc::Text - Included

#expand_tabs

Expands tab characters in text to eight spaces.

#flush_left

Flush text left based on the shortest line.

#markup

Convert a string in markup format into HTML.

#normalize_comment

Strips hashes, expands tabs then flushes text to the left.

#parse

Normalizes text then builds a ::RDoc::Markup::Document from it.

#snippet

The first limit characters of text as HTML.

#strip_hashes

Strips leading # characters from text

#strip_newlines

Strips leading and trailing n characters from text

#strip_stars

Strips /* */ style comments.

#to_html

Converts ampersand, dashes, ellipsis, quotes, copyright and registered trademark symbols in text to properly encoded characters.

#wrap

Wraps txt to line_len

Constructor Details

.new(parent_generator, options) ⇒ JsonIndex

Creates a new generator. parent_generator is used to determine the class_dir and file_dir of links in the output index.

options are the same options passed to the parent generator.

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 94

def initialize parent_generator, options
  @parent_generator = parent_generator
  @store            = parent_generator.store
  @options          = options

  @template_dir = File.expand_path '../template/json_index', __FILE__
  @base_dir = @parent_generator.base_dir

  @classes = nil
  @files   = nil
  @index   = nil
end

Instance Attribute Details

#index (readonly)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 86

attr_reader :index # :nodoc:

Instance Method Details

#build_index

Builds the JSON index as a Hash.

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 110

def build_index
  reset @store.all_files.sort, @store.all_classes_and_modules.sort

  index_classes
  index_methods
  index_pages

  { :index => @index }
end

#class_dir

The directory classes are written to

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 271

def class_dir
  @parent_generator.class_dir
end

#debug_msg(*msg)

Output progress information if debugging is enabled

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 123

def debug_msg *msg
  return unless $DEBUG_RDOC
  $stderr.puts(*msg)
end

#file_dir

The directory files are written to

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 278

def file_dir
  @parent_generator.file_dir
end

#generate

Writes the JSON index to disk

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 131

def generate
  debug_msg "Generating JSON index"

  debug_msg "  writing search index to %s" % SEARCH_INDEX_FILE
  data = build_index

  return if @options.dry_run

  out_dir = @base_dir + @options.op_dir
  index_file = out_dir + SEARCH_INDEX_FILE

  FileUtils.mkdir_p index_file.dirname, :verbose => $DEBUG_RDOC

  index_file.open 'w', 0644 do |io|
    io.set_encoding Encoding::UTF_8
    io.write 'var search_data = '

    JSON.dump data, io, 0
  end
  unless ENV['SOURCE_DATE_EPOCH'].nil?
    index_file.utime index_file.atime, Time.at(ENV['SOURCE_DATE_EPOCH'].to_i).gmtime
  end

  Dir.chdir @template_dir do
    Dir['**/*.js'].each do |source|
      dest = File.join out_dir, source

      FileUtils.install source, dest, :mode => 0644, :preserve => true, :verbose => $DEBUG_RDOC
    end
  end
end

#generate_gzipped

Compress the search_index.js file using gzip

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 166

def generate_gzipped
  return if @options.dry_run or not defined?(Zlib)

  debug_msg "Compressing generated JSON index"
  out_dir = @base_dir + @options.op_dir

  search_index_file = out_dir + SEARCH_INDEX_FILE
  outfile           = out_dir + "#{search_index_file}.gz"

  debug_msg "Reading the JSON index file from %s" % search_index_file
  search_index = search_index_file.read(mode: 'r:utf-8')

  debug_msg "Writing gzipped search index to %s" % outfile

  Zlib::GzipWriter.open(outfile) do |gz|
    gz.mtime = File.mtime(search_index_file)
    gz.orig_name = search_index_file.basename.to_s
    gz.write search_index
    gz.close
  end

  # GZip the rest of the js files
  Dir.chdir @template_dir do
    Dir['**/*.js'].each do |source|
      dest = out_dir + source
      outfile = out_dir + "#{dest}.gz"

      debug_msg "Reading the original js file from %s" % dest
      data = dest.read

      debug_msg "Writing gzipped file to %s" % outfile

      Zlib::GzipWriter.open(outfile) do |gz|
        gz.mtime = File.mtime(dest)
        gz.orig_name = dest.basename.to_s
        gz.write data
        gz.close
      end
    end
  end
end

#index_classes

Adds classes and modules to the index

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 211

def index_classes
  debug_msg "  generating class search index"

  documented = @classes.uniq.select do |klass|
    klass.document_self_or_methods
  end

  documented.each do |klass|
    debug_msg "    #{klass.full_name}"
    record = klass.search_record
    @index[:searchIndex]     << search_string(record.shift)
    @index[:longSearchIndex] << search_string(record.shift)
    @index[:info]            << record
  end
end

#index_methods

Adds methods to the index

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 230

def index_methods
  debug_msg "  generating method search index"

  list = @classes.uniq.flat_map do |klass|
    klass.method_list
  end.sort_by do |method|
    [method.name, method.parent.full_name]
  end

  list.each do |method|
    debug_msg "    #{method.full_name}"
    record = method.search_record
    @index[:searchIndex]     << "#{search_string record.shift}()"
    @index[:longSearchIndex] << "#{search_string record.shift}()"
    @index[:info]            << record
  end
end

#index_pages

Adds pages to the index

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 251

def index_pages
  debug_msg "  generating pages search index"

  pages = @files.select do |file|
    file.text?
  end

  pages.each do |page|
    debug_msg "    #{page.page_name}"
    record = page.search_record
    @index[:searchIndex]     << search_string(record.shift)
    @index[:longSearchIndex] << ''
    record.shift
    @index[:info]            << record
  end
end

#reset(files, classes)

This method is for internal use only.
[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 282

def reset files, classes # :nodoc:
  @files   = files
  @classes = classes

  @index = {
    :searchIndex => [],
    :longSearchIndex => [],
    :info => []
  }
end

#search_string(string)

Removes whitespace and downcases string

[ GitHub ]

  
# File 'lib/rdoc/generator/json_index.rb', line 296

def search_string string
  string.downcase.gsub(/\s/, '')
end