class RDoc::Generator::JsonIndex

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¶ ↑

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) click to toggle source

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
  @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

Public Instance Methods

build_index() click to toggle source

Builds the JSON index as a Hash.

# File lib/rdoc/generator/json_index.rb, line 105
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() click to toggle source

The directory classes are written to

# File lib/rdoc/generator/json_index.rb, line 218
def class_dir
  @parent_generator.class_dir
end

debug_msg(*msg) click to toggle source

Output progress information if debugging is enabled

# File lib/rdoc/generator/json_index.rb, line 118
def debug_msg *msg
  return unless $DEBUG_RDOC
  $stderr.puts(*msg)
end

file_dir() click to toggle source

The directory files are written to

# File lib/rdoc/generator/json_index.rb, line 225
def file_dir
  @parent_generator.file_dir
end

generate() click to toggle source

Writes the JSON index to disk

# File lib/rdoc/generator/json_index.rb, line 126
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 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() click to toggle source

Adds classes and modules to the index

# File lib/rdoc/generator/json_index.rb, line 158
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() click to toggle source

Adds methods to the index

# File lib/rdoc/generator/json_index.rb, line 177
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() click to toggle source

Adds pages to the index

# File lib/rdoc/generator/json_index.rb, line 198
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) click to toggle source

Removes whitespace and downcases string

# File lib/rdoc/generator/json_index.rb, line 243
def search_string string
  string.downcase.gsub(/\s/, '')
end