RDoc::Generator::

JsonIndex

class

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 top_levels
    # ...
    @json_index.generate top_levels
  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.

Constants

SEARCH_INDEX_FILE

Where the search index lives in the generated output

Public Class Methods

new(parent_generator, options)

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.

# File lib/rdoc/generator/json_index.rb, line 89
def initialize parent_generator, options
  @parent_generator = parent_generator
  @options = options

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

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

Public Instance Methods

class_dir()

The directory classes are written to

# File lib/rdoc/generator/json_index.rb, line 210
def class_dir
  @parent_generator.class_dir
end
debug_msg(*msg)

Output progress information if debugging is enabled

# File lib/rdoc/generator/json_index.rb, line 104
def debug_msg *msg
  return unless $DEBUG_RDOC
  $stderr.puts(*msg)
end
file_dir()

The directory files are written to

# File lib/rdoc/generator/json_index.rb, line 217
def file_dir
  @parent_generator.file_dir
end
generate(top_levels)

Creates the JSON index.

# File lib/rdoc/generator/json_index.rb, line 112
def generate top_levels
  debug_msg "Generating JSON index"

  reset top_levels.sort, RDoc::TopLevel.all_classes_and_modules.sort

  index_classes
  index_methods
  index_pages

  debug_msg "  writing search index to %s" % SEARCH_INDEX_FILE
  data = { :index => @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 if Object.const_defined? :Encoding
    io.write 'var search_data = '

    JSON.dump data, io, 0
  end

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

      FileUtils.install source, dest, :mode => 0644, :verbose => $DEBUG_RDOC
    end
  end
end
index_classes()

Adds classes and modules to the index

# File lib/rdoc/generator/json_index.rb, line 150
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

# File lib/rdoc/generator/json_index.rb, line 169
def index_methods
  debug_msg "  generating method search index"

  list = @classes.uniq.map do |klass|
    klass.method_list
  end.flatten.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

# File lib/rdoc/generator/json_index.rb, line 190
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
search_string(string)

Removes whitespace and downcases string

# File lib/rdoc/generator/json_index.rb, line 235
def search_string string
  string.downcase.gsub(%r\s/, '')
end