Module: Helper

Defined in:
lib/helper.rb,
lib/web/helper4web.rb

Overview

雑多なお助けメソッド群

Defined Under Namespace

Classes: AsyncCommand, InvalidVariableName, InvalidVariableType, UnknownVariableType

Constant Summary collapse

HOST_OS = 
RbConfig::CONFIG["host_os"]
ENTITIES = 
{ quot: '"', amp: "&", nbsp: " ", lt: "<", gt: ">", copy: "(c)", "#39" => "'" }
TYPE_OF_VALUE = 
{
  TrueClass => :boolean, FalseClass => :boolean, Fixnum => :integer,
  Float => :float, String => :string
}

Class Method Summary collapse

Class Method Details

.ampersand_to_entity(str) ⇒ Object

アンパサンドをエンティティに変換



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# File 'lib/helper.rb', line 136

def ampersand_to_entity(str)
  str.gsub(/&(?!amp;)/mi, "&amp;")
end

.convert_to_windows_path(path) ⇒ Object

CYGWINのパスからwindowsのパスへと変換(cygpathを呼び出すだけ)



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# File 'lib/helper.rb', line 129

def convert_to_windows_path(path)
  `cygpath -aw \"#{path}\"`.strip
end

.determine_os ⇒ Object 



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# File 'lib/helper.rb', line 28

def determine_os
  case
  when os_windows?
    :windows
  when os_mac?
    :mac
  when os_cygwin?
    :cygwin
  else
    :other
  end
end

.engine_jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/helper.rb', line 41

def engine_jruby?
  @@engine_is_jruby ||= RUBY_ENGINE == "jruby"
end

.extract_illust_chuki(str) ⇒ Object

文章の中から挿絵注記を分離する



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# File 'lib/helper.rb', line 143

def extract_illust_chuki(str)
  illust_chuki_array = []
  extracted_str = str.gsub(/[ 　\t]*?(［＃挿絵（.+?）入る］)\n?/) do
    illust_chuki_array << $1
    ""
  end
  [extracted_str, illust_chuki_array]
end

.getch ⇒ Object 



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# File 'lib/helper.rb', line 47

def $stdin.getch
  WinAPI._getch.chr
end

.open_browser(url) ⇒ Object 



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# File 'lib/helper.rb', line 78

def open_browser(url)
  case determine_os
  when :windows
    escaped_url = url.gsub("%", "%^").gsub("&", "^&")
    # MEMO: start の引数を "" で囲むと動かない
    system(%!start #{escaped_url}!)
  when :cygwin
    system(%!cygstart #{url}!)
  when :mac
    system(%!open "#{url}"!)
  else
    open_browser_linux(url, "ブラウザが見つかりませんでした")
  end
end

.open_browser_linux(address, error_message) ⇒ Object 



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# File 'lib/helper.rb', line 54

def open_browser_linux(address, error_message)
  %w(xdg-open firefox w3m).each do |browser|
    system(%!#{browser} "#{address}"!)
    return if $?.success?
  end
  error error_message
end

.open_directory(path, confirm_message = nil) ⇒ Object 



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# File 'lib/helper.rb', line 62

def open_directory(path, confirm_message = nil)
  if confirm_message
    return unless Narou::Input.confirm(confirm_message, false, false)
  end
  case determine_os
  when :windows
    system(%!explorer "file:///#{path.encode(Encoding::Windows_31J)}"!)
  when :cygwin
    system(%!cygstart "#{path}"!)
  when :mac
    system(%!open "#{path}"!)
  else
    open_browser_linux(path, "フォルダが開けませんでした")
  end
end

.os_cygwin? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/helper.rb', line 24

def os_cygwin?
  @@os_is_cygwin ||= HOST_OS =~ /cygwin/i
end

.os_mac? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/helper.rb', line 20

def os_mac?
  @@os_is_mac ||= HOST_OS =~ /darwin/i
end

.os_windows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/helper.rb', line 16

def os_windows?
  @@os_is_windows ||= HOST_OS =~ /mswin(?!ce)|mingw|bccwin/i
end

.pretreatment_source(src, encoding = Encoding::UTF_8) ⇒ Object

ダウンロードしてきたデータを使いやすいように処理



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# File 'lib/helper.rb', line 110

def pretreatment_source(src, encoding = Encoding::UTF_8)
  restor_entity(src.force_encoding(encoding)).gsub("\r", "")
end

.print_horizontal_rule ⇒ Object 



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# File 'lib/helper.rb', line 93

def print_horizontal_rule
  puts "―" * 35
end

.replace_filename_special_chars(str, invalid_replace = false) ⇒ Object 



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# File 'lib/helper.rb', line 97

def replace_filename_special_chars(str, invalid_replace = false)
  result = str.tr("/:*?\"<>|.", "／：＊？”〈〉｜．").gsub("\\", "￥").gsub("\t", "").gsub("\n", "")
  if invalid_replace
    org_encoding = result.encoding
    result = result.encode(Encoding::Windows_31J, invalid: :replace, undef: :replace, replace: "_")
                   .encode(org_encoding)
  end
  result
end

.restor_entity(str) ⇒ Object

エンティティ復号



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# File 'lib/helper.rb', line 118

def restor_entity(str)
  result = str.encode("UTF-16BE", "UTF-8", :invalid => :replace, :undef => :replace, :replace => "?").encode("UTF-8")
  ENTITIES.each do |key, value|
    result.gsub!("&#{key};", value)
  end
  result
end

.string_cast_to_type(value, type) ⇒ Object

文字列データを指定された型にキャストする



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# File 'lib/helper.rb', line 191

def string_cast_to_type(value, type)
  result = nil
  case type
  when :boolean
    case value.strip.downcase
    when "true"
      result = true
    when "false"
      result = false
    else
      raise InvalidVariableType, type
    end
  when :integer
    begin
      result = Integer(value)
    rescue
      raise InvalidVariableType, type
    end
  when :float
    begin
      result = Float(value)
    rescue
      raise InvalidVariableType, type
    end
  when :directory, :file
    if File.method("#{type}?").call(value)
      result = File.expand_path(value)
    else
      raise InvalidVariableType, type
    end
  when :string
    result = value
  else
    raise UnknownVariableType, type
  end
  result
end

.type_of_value(value) ⇒ Object

Rubyの変数がなんの型かシンボルで取得



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# File 'lib/helper.rb', line 237

def type_of_value(value)
  TYPE_OF_VALUE[value.class]
end

.variable_type_to_description(type) ⇒ Object

与えられた型情報の意味文字列を取得



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# File 'lib/helper.rb', line 169

def variable_type_to_description(type)
  case type
  when :boolean
    "true/false  "
  when :integer
    "整数        "
  when :float
    "小数点数    "
  when :string
    "文字列      "
  when :directory
    "フォルダパス"
  when :file
    "ファイルパス"
  else
    raise UnknownVariableType, type
  end
end