Class: Debugger::ControlCommandProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-debug/processor.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(interface) ⇒ ControlCommandProcessor

Returns a new instance of ControlCommandProcessor.



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# File 'lib/ruby-debug/processor.rb', line 16

def initialize(interface)
  @interface = interface
  @printer = XmlPrinter.new(@interface)
end

Instance Method Details



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# File 'lib/ruby-debug/processor.rb', line 21

def print(*args)
  @interface.print(*args)
end

#process_commands ⇒ Object 



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# File 'lib/ruby-debug/processor.rb', line 25

def process_commands
  @printer.print_debug("Starting command read loop")
  ctrl_cmd_classes = Command.commands.select{|cmd| cmd.control}
  state = ControlState.new(@interface)
  ctrl_cmds = ctrl_cmd_classes.map{|cmd| cmd.new(state, @printer)}
  
  while input = @interface.read_command
    # escape % since print_debug might use printf
    @printer.print_debug "Processing: #{input.gsub('%', '%%')}"
    # sleep 0.3
    catch(:debug_error) do
      if cmd = ctrl_cmds.find{|c| c.match(input) }
        cmd.execute
      else
        process_context_commands(input)
      end
    end
  end
rescue IOError, Errno::EPIPE
  @printer.print_error "INTERNAL ERROR!!! #{$!}\n" rescue nil
  @printer.print_error $!.backtrace.map{|l| "\t#{l}"}.join("\n") rescue nil
rescue Exception
  @printer.print_error "INTERNAL ERROR!!! #{$!}\n" rescue nil
  @printer.print_error $!.backtrace.map{|l| "\t#{l}"}.join("\n") rescue nil
ensure
  @interface.close
end

#process_context_commands(input) ⇒ Object 



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# File 'lib/ruby-debug/processor.rb', line 53

def process_context_commands(input)
  unless Debugger.event_processor.at_line?
    @printer.print_error "There is no thread suspended at the time and therefore no context to execute '#{input.gsub('%', '%%')}'"
    return
  end
  context = Debugger.event_processor.context
  file = Debugger.event_processor.file
  line = Debugger.event_processor.line
  event_cmds_classes = Command.commands.select{|cmd| cmd.event}
  state = State.new do |s|
    s.context = context
    s.file    = file
    s.line    = line
    s.binding = context.frame_binding(0)
    s.interface = @interface
  end
  event_cmds = event_cmds_classes.map{|cmd| cmd.new(state, @printer) }
  catch(:debug_error) do
    splitter[input].each do |input|
      # escape % since print_debug might use printf
      @printer.print_debug "Processing context: #{input.gsub('%', '%%')}"
      if cmd = event_cmds.find{ |c| c.match(input) }
        if context.dead? && cmd.class.need_context
          @printer.print_msg "Command is unavailable\n"
        else
          cmd.execute
        end
      else
        @printer.print_msg "Unknown command: #{input}"
      end
    end
  end
  
  context.thread.run if state.proceed?
end

#splitter ⇒ Object 



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# File 'lib/ruby-debug/processor.rb', line 89

def splitter
  return lambda do |str|
    str.split(/;/).inject([]) do |m, v|
      if m.empty?
        m << v
      else
        if m.last[-1] == ?\\
          m.last[-1,1] = ''
          m.last << ';' << v
        else
          m << v
        end
      end
      m
    end
  end
end