Class: Textbringer::Controller

Inherits:
Object
  • Object
show all
Defined in:
lib/textbringer/controller.rb

Constant Summary collapse

@@current = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Controller

Returns a new instance of Controller.



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# File 'lib/textbringer/controller.rb', line 22

def initialize
  @key_sequence = []
  @last_key = nil
  @recursive_edit_level = 0
  @this_command = nil
  @last_command = nil
  @overriding_map = nil
  @prefix_arg = nil
  @current_prefix_arg = nil
  @echo_immediately = false
end

Instance Attribute Details

#current_prefix_arg ⇒ Object

Returns the value of attribute current_prefix_arg.



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# File 'lib/textbringer/controller.rb', line 9

def current_prefix_arg
  @current_prefix_arg
end

#key_sequence ⇒ Object (readonly)

Returns the value of attribute key_sequence.



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# File 'lib/textbringer/controller.rb', line 10

def key_sequence
  @key_sequence
end

#last_command ⇒ Object

Returns the value of attribute last_command.



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# File 'lib/textbringer/controller.rb', line 8

def last_command
  @last_command
end

#last_key ⇒ Object (readonly)

Returns the value of attribute last_key.



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# File 'lib/textbringer/controller.rb', line 10

def last_key
  @last_key
end

#overriding_map ⇒ Object

Returns the value of attribute overriding_map.



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# File 'lib/textbringer/controller.rb', line 8

def overriding_map
  @overriding_map
end

#prefix_arg ⇒ Object

Returns the value of attribute prefix_arg.



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# File 'lib/textbringer/controller.rb', line 9

def prefix_arg
  @prefix_arg
end

#recursive_edit_level ⇒ Object (readonly)

Returns the value of attribute recursive_edit_level.



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# File 'lib/textbringer/controller.rb', line 10

def recursive_edit_level
  @recursive_edit_level
end

#this_command ⇒ Object

Returns the value of attribute this_command.



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# File 'lib/textbringer/controller.rb', line 8

def this_command
  @this_command
end

Class Method Details

.current ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 14

def self.current
  @@current
end

.current=(controller) ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 18

def self.current=(controller)
  @@current = controller
end

Instance Method Details

#command_loop(tag) ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 34

def command_loop(tag)
  catch(tag) do
    loop do
      begin
        echo_input
        c = read_char
        break if c.nil?
        Window.echo_area.clear_message
        @last_key = c
        @key_sequence << @last_key
        cmd = key_binding(@key_sequence)
        if cmd.is_a?(Symbol) || cmd.respond_to?(:call)
          @key_sequence.clear
          @this_command = cmd
          @current_prefix_arg = @prefix_arg
          @prefix_arg = nil
          begin
            run_hooks(:pre_command_hook, remove_on_error: true)
            if cmd.is_a?(Symbol)
              send(cmd)
            else
              cmd.call
            end
          ensure
            run_hooks(:post_command_hook, remove_on_error: true)
            @last_command = @this_command
            @this_command = nil
          end
        else
          if cmd.nil?
            keys = @key_sequence.map { |ch| key_name(ch) }.join(" ")
            @key_sequence.clear
            @prefix_arg = nil
            message("#{keys} is undefined")
          end
        end
      rescue Exception => e
        show_exception(e)
        @prefix_arg = nil
      end
      Window.redisplay
    end
  end
end

#echo_input ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 126

def echo_input
  if @prefix_arg || !@key_sequence.empty?
    if !@echo_immediately
      return if wait_input(1000)
    end
    @echo_immediately = true
    s = String.new
    if @prefix_arg
      s << "C-u"
      if @prefix_arg != [4]
        s << "(#{@prefix_arg.inspect})"
      end
    end
    if !@key_sequence.empty?
      s << " " if !s.empty?
      s << @key_sequence.map { |ch| key_name(ch) }.join(" ")
    end
    s << "-"
    Window.echo_area.show(s)
    Window.echo_area.redisplay
    Window.current.window.noutrefresh
    Window.update
  else
    @echo_immediately = false
  end
end

#key_name(key) ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 111

def key_name(key)
  case key
  when Symbol
    "<#{key}>"
  when "\e"
    "ESC"
  when "\C-m"
    "RET"
  when /\A[\0-\b\v-\x1f\x7f]\z/
    "C-" + (key.ord ^ 0x40).chr.downcase
  else
    key.to_s
  end
end

#read_char ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 83

def read_char
  Window.current.read_char
end

#read_char_nonblock ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 87

def read_char_nonblock
  Window.current.read_char_nonblock
end

#received_keyboard_quit? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/textbringer/controller.rb', line 91

def received_keyboard_quit?
  while key = read_char_nonblock
    if GLOBAL_MAP.lookup([key]) == :keyboard_quit
      return true
    end
  end
  false
end

#recursive_edit ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 100

def recursive_edit
  @recursive_edit_level += 1
  begin
    if command_loop(RECURSIVE_EDIT_TAG)
      raise Quit
    end
  ensure
    @recursive_edit_level -= 1
  end
end

#wait_input(msecs) ⇒ Object 



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# File 'lib/textbringer/controller.rb', line 79

def wait_input(msecs)
  Window.current.wait_input(msecs)
end