Class: Command::TextInterpreter

Inherits:
BaseInterpreter show all
Defined in:
lib/command-set/text-interpreter.rb

Instance Attribute Summary collapse

Attributes inherited from BaseInterpreter

#command_set, #logger, #out_io, #subject

Instance Method Summary collapse

Methods inherited from BaseInterpreter

#behavior, #fill_subject, #get_subject, #next_command, #pop_mode, #prep_subject, #process_input, #push_mode, #subject_requirements, #subject_template

Constructor Details

#initialize ⇒ TextInterpreter

Returns a new instance of TextInterpreter.



66
67
68
69
70
71
72
 
# File 'lib/command-set/text-interpreter.rb', line 66

def initialize
  super
  @complete_line = false
  @behavior.merge!(
    :prompt => [/(?:: )?$/, "> "]
  )
end

Instance Attribute Details

#complete_line ⇒ Object

Returns the value of attribute complete_line.



74
75
76
 
# File 'lib/command-set/text-interpreter.rb', line 74

def complete_line
  @complete_line
end

Instance Method Details

#complete(word, line) ⇒ Object 



140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/command-set/text-interpreter.rb', line 140

def complete(word, line)
  list = current_command_set.completion_list(line, word, build_subject)

  if list.length == 0
    raise CommandException, "Unrecognized term: #{word}"
  end

  return word if list[-1].empty?

  if list.length == 1
    return list[0]
  else
    raise CommandException, "Ambiguous term: #{word}"
  end
end

#cook_input(line) ⇒ Object 



124
125
126
127
128
129
130
131
132
133
134
135
 
# File 'lib/command-set/text-interpreter.rb', line 124

def cook_input(line)
  line = split_line(line)
  if(@complete_line)
    new_line = []
    line.each do |word|
      word = complete(word, new_line.dup)
      new_line << word
    end
    line = new_line
  end
  return CommandSetup.new(line)
end

#get_formatter ⇒ Object 



195
196
197
 
# File 'lib/command-set/text-interpreter.rb', line 195

def get_formatter
  return Results::StrategyFormatter.new(::Command::raw_stdout)
end

#get_prompt ⇒ Object 



199
200
201
202
203
204
205
206
207
 
# File 'lib/command-set/text-interpreter.rb', line 199

def get_prompt
  prompt = ""

  prompt.sub!(*(@command_set.prompt))
  @sub_modes.each do |mode|
    prompt.sub!(*(mode.prompt))
  end
  prompt.sub!(*(@behavior[:prompt]))
end

#go ⇒ Object 



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/command-set/text-interpreter.rb', line 76

def go
  if @command_set.nil? or @subject.nil?
    raise "command_set or subject unset!"
  end

  @stop = false

  begin
    old_proc = set_readline_completion do |prefix|
      readline_complete(Readline.line_buffer, prefix)
    end

    line = readline(get_prompt, true)
    if line.nil?
      puts
      break
    end
    next if line.empty?
    process_line(line)
  rescue Interrupt
    @out_io.puts "Interrupt: please use \"quit\""
  rescue CommandException => ce
    output_exception("Error", ce)
  rescue Exception => e
    output_exception("Exception", e)
    pause_before_dying
  ensure
    unless old_proc.nil?
      set_readline_completion(&old_proc)
    end
  end until @stop
end

#output_exception(label, ex) ⇒ Object 



109
110
111
112
113
114
115
116
 
# File 'lib/command-set/text-interpreter.rb', line 109

def output_exception(label, ex)
  @out_io.puts label + ": " + ex.message
  @out_io.puts ex.backtrace.join("\n") if @behavior[:debug_commands]
  logger.warn ex.message
  ex.backtrace.each do |line|
    logger.debug line
  end
end

#pause_before_dying ⇒ Object 



118
119
120
121
122
 
# File 'lib/command-set/text-interpreter.rb', line 118

def pause_before_dying
  puts "Waiting for return"
  $stdin.gets
  stop
end

#prompt_user(message) ⇒ Object 



213
214
215
 
# File 'lib/command-set/text-interpreter.rb', line 213

def prompt_user(message)
  readline(message)
end

#readline_complete(buffer, prefix) ⇒ Object 



156
157
158
159
160
161
162
163
164
 
# File 'lib/command-set/text-interpreter.rb', line 156

def readline_complete(buffer, prefix)
  parsed_input = split_line(buffer)
  unless prefix.empty?
    parsed_input.pop
  end

  return current_command_set.completion_list(parsed_input, 
                                             prefix, build_subject)
end

#split_line(line) ⇒ Object 



166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
 
# File 'lib/command-set/text-interpreter.rb', line 166

def split_line(line)
  line_array = []
  scanner = StringScanner.new(line)

  until scanner.eos?
    scanner.scan(/\s*/)
    quote = scanner.scan(/['"]/)
    unless quote.nil?
      line_array << ""
      until scanner.eos?
        line_array.last << scanner.scan(/[^#{quote}\\]*/)
        stopped_by = scanner.scan(/[#{quote}\\]/)
        break unless stopped_by == '\\'
        line_array.last << scanner.getch
      end
    else
      line_array << ""
      until scanner.eos?
        line_array.last << scanner.scan(/[^\s\\]*/)
        stopped_by = scanner.scan(/[\s\\]/)
        break unless stopped_by == '\\'
        line_array.last << scanner.getch
      end
    end
  end

  return line_array
end

#stop ⇒ Object 



209
210
211
 
# File 'lib/command-set/text-interpreter.rb', line 209

def stop
  @stop = true
end