Class: Kaitai::Struct::Visualizer::Tree

Inherits:
Object
  • Object
show all
Defined in:
lib/kaitai/struct/visualizer/tree.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ui, st) ⇒ Tree

Returns a new instance of Tree.



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 9

def initialize(ui, st)
  @ui = ui
  @st = st
  @root = Node.new(self, st, 0)
  @root.id = '[root]'
  @max_scr_ln = @ui.rows - 3

  @hv_shift_x = @ui.cols - HexViewer.line_width - 1

  @cur_io = nil
  @hv = HexViewer.new(ui, nil, @hv_shift_x, self)
  @hv_hidden = false

  @cur_line = 0
  @cur_shift = 0
  @do_exit = false
end

Class Method Details

.explore_object(obj, level) ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 228

def self.explore_object(obj, level)
  root = Node.new(obj, level)
  if obj.is_a?(Fixnum) or obj.is_a?(String)
    # do nothing else
  elsif obj.is_a?(Array)
    root = Node.new(obj, level)
    obj.each_with_index { |el, i|
      n = explore_object(el, level + 1)
      n.id = i
      root.add(n)
    }
  else
    root = Node.new(obj, level)
    obj.instance_variables.each { |k|
      k = k.to_s
      next if k =~ /^@_/
      el = obj.instance_eval(k)
      n = explore_object(el, level + 1)
      n.id = k
      root.add(n)
    }
  end
  root
end

Instance Method Details

#clamp_cursor ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 140

def clamp_cursor
  if @cur_line
    @cur_line = 0 if @cur_line < 0

    if @cur_line - @cur_shift < 0
      @cur_shift = @cur_line
    end
    if @cur_line - @cur_shift > @max_scr_ln
      @cur_shift = @cur_line - @max_scr_ln
    end
  end
end

#do_exit ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 193

def do_exit
  @do_exit = true
end

#draw_rec(n) ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 162

def draw_rec(n)
  scr_ln = @ln - @cur_shift
  return if @cur_node and scr_ln > @max_scr_ln

  if @ln == @cur_line
    # Seeking cur_node by cur_line
    @cur_node = n
    @ui.bg_color = :gray
    @ui.fg_color = :black
  elsif @cur_node == n
    # Seeking cur_line by cur_node
    @cur_line = @ln
    @ui.bg_color = :gray
    @ui.fg_color = :black
  end

  @draw_time += Benchmark.realtime {
#      n.draw(@ui) if scr_ln >= 0
    n.draw(@ui) if scr_ln >= 0 and scr_ln <= @max_scr_ln
  }

  @ui.reset_colors if @ln == @cur_line
  @ln += 1
  if n.open?
    n.children.each { |ch|
      draw_rec(ch)
      break if scr_ln > @max_scr_ln
    }
  end
end

#highlight_regions(max_levels) ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 209

def highlight_regions(max_levels)
  node = @cur_node
  r = []
  max_levels.times { |i|
    return r if node.nil?
    r << [node.pos1, node.pos2]
    node = node.parent
  }
  r
end

#hv_update_io ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 197

def hv_update_io
  io = @cur_node.io
  if io != @cur_io
    @cur_io = io
    io.seek(0)
    buf = io.read_bytes_full
    @hv.buf = buf

#      @hv.redraw
  end
end

#process_keypress ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 78

def process_keypress
  c = @ui.read_char_mapped
  case c
  when :up_arrow
    @cur_line -= 1
    @cur_node = nil
  when :down_arrow
    @cur_line += 1
    @cur_node = nil
  when :left_arrow
    if @cur_node.open?
      @cur_node.close
    else
      par = @cur_node.parent
      if par
        @cur_line = nil
        @cur_node = par
      end
    end
  when :right_arrow
    if @cur_node.openable?
      if @cur_node.open?
        @cur_line += 1
        @cur_node = nil
      else
        @cur_node.open
      end
    end
  when :home
    @cur_line = @cur_shift = 0
    @cur_node = nil
  when :end
    @cur_line = @root.height - 1
    @cur_node = nil
  when :pg_up
    @cur_line -= 20
    @cur_node = nil
  when :pg_dn
    @cur_line += 20
    @cur_node = nil
  when :enter
    if @cur_node.hex?
      @ui.clear
      hv = HexViewer.new(@ui, @cur_node.value)
      hv.redraw
      hv.run
      @ui.clear
      redraw
    else
      @cur_node.toggle
    end
  when :tab
    @hv.run
  when 'H'
    @hv_hidden = !@hv_hidden
    @ui.clear
    redraw
  when 'q'
    @do_exit = true
  end
end

#redraw ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 153

def redraw
  @draw_time = 0
  Benchmark.realtime {
    @ui.clear
    @ln = 0
    draw_rec(@root)
  }
end

#run ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 27

def run
  c = nil
  loop {
    t = redraw

    if @cur_node.nil? and not @cur_line.nil?
      # gone beyond the end of the tree
      @cur_line = @root.height - 1
      clamp_cursor
      redraw
    end

    raise '@cur_line is undetermined' if @cur_line.nil?
    raise '@cur_node is undetermined' if @cur_node.nil?

    thv = Benchmark.realtime {
      unless @hv_hidden
        hv_update_io

        unless @cur_node.pos1.nil?
          if (@hv.addr < @cur_node.pos1) or (@hv.addr >= @cur_node.pos2)
            @hv.addr = @cur_node.pos1
            @hv.ensure_visible
          end
        end

        @hv.redraw
        regs = highlight_regions(4)
        @hv.highlight(regs)
      end
    }

    @ui.goto(0, @max_scr_ln + 1)
    printf "all: %d, tree: %d, tree_draw: %d, hexview: %d, ln: %d, ", (t + thv) * 1e6, t * 1e6, @draw_time * 1e6, thv * 1e6, @ln
    puts "highlight = #{@cur_node.pos1}..#{@cur_node.pos2}"
    #puts "keypress: #{c.inspect}"

    begin
      process_keypress
    rescue EOFError => e
      @ui.message_box_exception(e)
    rescue Kaitai::Struct::Stream::UnexpectedDataError => e
      @ui.message_box_exception(e)
    end

    return if @do_exit

    clamp_cursor
  }
end

#tree_width ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 220

def tree_width
  if @hv_hidden
    @ui.cols
  else
    @hv_shift_x
  end
end