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

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

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 12

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

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

  recalc_sizes

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

  @ui.on_resize = proc { |redraw_needed|
    recalc_sizes
    redraw      if redraw_needed
    @hv.redraw  if redraw_needed
  }
end

Instance Method Details

#clamp_cursor ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 148

def clamp_cursor
  return unless @cur_line

  @cur_line = 0 if @cur_line.negative?

  @cur_shift = @cur_line if (@cur_line - @cur_shift).negative?
  @cur_shift = @cur_line - @max_scr_ln if (@cur_line - @cur_shift) > @max_scr_ln
end

#do_exit ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 198

def do_exit
  @do_exit = true
end

#draw_rec(n) ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 166

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

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

  @draw_time += Benchmark.realtime do
    # n.draw(@ui) if scr_ln >= 0
    n.draw(@ui) if (scr_ln >= 0) && (scr_ln <= @max_scr_ln)
  end

  @ui.reset_colors if @ln == @cur_line
  @ln += 1

  return unless n.open?

  n.children.each do |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 214

def highlight_regions(max_levels)
  node = @cur_node
  r = []
  max_levels.times do |_i|
    return r if node.nil?

    r << [node.pos1, node.pos2]
    node = node.parent
  end
  r
end

#hv_update_io ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 202

def hv_update_io
  io = @cur_node.io
  return unless io != @cur_io

  @cur_io = io
  io.seek(0)
  buf = io.read_bytes_full
  @hv.buf = buf

  # @hv.redraw
end

#process_keypress ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 86

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

#recalc_sizes ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 35

def recalc_sizes
  @max_scr_ln = @ui.rows - 3
  @hv.shift_x = @ui.cols - HexViewer.line_width - 1
end

#redraw ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 157

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

#run ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 40

def run
  loop do
    t = redraw

    if @cur_node.nil? && !@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 do
      unless @hv_hidden
        hv_update_io

        if !@cur_node.pos1.nil? && ((@hv.addr < @cur_node.pos1) || (@hv.addr >= @cur_node.pos2))
          @hv.addr = @cur_node.pos1
          @hv.ensure_visible
        end

        @hv.redraw
        regs = highlight_regions(4)
        @hv.highlight(regs)
      end
    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 Kaitai::Struct::Visualizer::KSErrorMatcher => e
      @ui.message_box_exception(e)
    end

    return if @do_exit

    clamp_cursor
  end
end

#tree_width ⇒ Object 



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# File 'lib/kaitai/struct/visualizer/tree.rb', line 226

def tree_width
  if @hv_hidden
    @ui.cols
  else
    @hv.shift_x
  end
end