class Rabbit::KeyHandler

# File lib/rabbit/key-handler.rb, line 22
def initialize(canvas, window)
  @canvas = canvas
  @window = window
  init
end

# File lib/rabbit/key-handler.rb, line 84
def attach
  @window.insert_action_group("rabbit", @canvas.actions.group)
  @window.add_controller(@shortcut_controller)
  @window.add_controller(@toggle_terminal_shortcut_controller)
  @window.add_controller(@user_shortcut_controller)
end

# File lib/rabbit/key-handler.rb, line 266
def calc_slide_number(val, modifier)
  val += 10 if modifier.control_mask?
  val += 20 if modifier.alt_mask?
  val
end

# File lib/rabbit/key-handler.rb, line 58
def clear
  super
  clear_user_shortcuts
end

# File lib/rabbit/key-handler.rb, line 163
def clear_user_accel_group
  @user_accel_group = Gtk::AccelGroup.new
end

# File lib/rabbit/key-handler.rb, line 80
def clear_user_shortcuts
  @user_shortcuts.remove_all
end

# File lib/rabbit/key-handler.rb, line 29
def connect_key(keyval, modifier, flags, &block)
  trigger = Gtk::KeyvalTrigger.new(keyval, modifier)
  action = Gio::SimpleAction.new
  action.signal_connect do
    block.call
  end
  shortcut = Gtk::Shortcut.new(trigger, action)
  @user_shortcuts.append(shortcut)
end

# File lib/rabbit/key-handler.rb, line 63
def detach
  @window.insert_action_group("rabbit", nil)
  @window.remove_controller(@user_shortcut_controller)
  @window.remove_controller(@toggle_terminal_controller)
  @window.remove_controller(@shortcut_controller)
end

# File lib/rabbit/key-handler.rb, line 39
def disconnect_key(keyval, modifier)
  @user_shortcuts.each_with_index do |shortcut, i |
    if shortcut.keyval == keyval and shortcut.modifier == modifier
      @user_shortcuts.remove(i)
      break
    end
  end
end

# File lib/rabbit/key-handler.rb, line 261
def have_slide_number_related_mask?(modifier)
  modifier.control_mask? or
    modifier.alt_mask?
end

# File lib/rabbit/key-handler.rb, line 71
def init
  @user_shortcuts = Gio::ListStore.new(Gtk::Shortcut)
  @user_shortcut_controller =
    Gtk::ShortcutController.new(@user_shortcuts)
  init_shortcuts
  init_toggle_terminal_shortcuts
  attach
end

# File lib/rabbit/key-handler.rb, line 173
def init_accel_group
  @accel_group = Gtk::AccelGroup.new
  init_keys
end

# File lib/rabbit/key-handler.rb, line 371
def init_alt_keys
  mod = Gdk::ModifierType::ALT_MASK
  [
    ["ResetAdjustment", Keys::Alt::RESET_ADJUSTMENT_KEYS],
    ["ResetTimer", Keys::Alt::RESET_TIMER_KEYS],
  ].each do |action_name, keys|
    set_keys(action_name, nil, keys, mod)
  end
end

# File lib/rabbit/key-handler.rb, line 352
def init_control_keys
  mod = Gdk::ModifierType::CONTROL_MASK
  [
    ["ClearGraffiti", Keys::Control::CLEAR_GRAFFITI_KEYS],
    ["UndoGraffiti", Keys::Control::UNDO_GRAFFITI_KEYS],
    ["ClearSlide", Keys::Control::CLEAR_SLIDE_KEYS],
    ["Print", Keys::Control::PRINT_KEYS],
    ["SearchSlideForward", Keys::Control::SEARCH_SLIDE_FORWARD_KEYS],
    ["SearchSlideBackward", Keys::Control::SEARCH_SLIDE_BACKWARD_KEYS],
    ["SearchSlideForwardNext",
     Keys::Control::SEARCH_SLIDE_FORWARD_NEXT_KEYS],
    ["SearchSlideBackwardNext",
     Keys::Control::SEARCH_SLIDE_BACKWARD_NEXT_KEYS],
    ["StopSlideSearch", Keys::Control::STOP_SLIDE_SEARCH_KEYS],
  ].each do |action_name, keys|
    set_keys(action_name, nil, keys, mod)
  end
end

# File lib/rabbit/key-handler.rb, line 253
def init_keys
  init_move_slide_keys
  init_no_prefix_keys
  init_shift_keys
  init_control_keys
  init_alt_keys
end

# File lib/rabbit/key-handler.rb, line 272
def init_move_slide_keys
  no_mod = Gdk::ModifierType.new
  mods = Utils.power_set([
                           Gdk::ModifierType::CONTROL_MASK,
                           Gdk::ModifierType::ALT_MASK,
                         ])
  mods.each do |mod|
    mod = mod.inject(no_mod) do |result, item|
      result | item
    end
    (0..9).each do |i|
      key = Gdk::Keyval.const_get("KEY_#{i}")
      index = calc_slide_number(i, mod)
      set_keys("JumpToSlide", GLib::Variant.new(index, "i"), [key], mod)
    end
    (0..9).each do |i|
      key = Gdk::Keyval.const_get("KEY_KP_#{i}")
      index = calc_slide_number(i, mod)
      set_keys("JumpToSlide", GLib::Variant.new(index, "i"), [key], mod)
    end
    if mod == no_mod
      set_keys("NextSlide",
               nil,
               Keys::MOVE_TO_NEXT_SLIDE_KEYS,
               mod)
      set_keys("PreviousSlide",
               nil,
               Keys::MOVE_TO_PREVIOUS_SLIDE_KEYS,
               mod)
    else
      set_keys("JumpToRelativeSlide",
               GLib::Variant.new(calc_slide_number(0, mod), "i"),
               Keys::MOVE_TO_NEXT_SLIDE_KEYS,
               mod)
      set_keys("JumpToRelativeSlide",
               GLib::Variant.new(-calc_slide_number(0, mod), "i"),
               Keys::MOVE_TO_PREVIOUS_SLIDE_KEYS,
               mod)
    end
  end
end

# File lib/rabbit/key-handler.rb, line 314
def init_no_prefix_keys
  mod = Gdk::ModifierType.new
  [
    ["Quit", Keys::QUIT_KEYS],
    ["Next", Keys::MOVE_TO_NEXT_KEYS],
    ["Previous", Keys::MOVE_TO_PREVIOUS_KEYS],
    ["FirstSlide", Keys::MOVE_TO_FIRST_KEYS],
    ["LastSlide", Keys::MOVE_TO_LAST_KEYS],
    ["ToggleFullscreen", Keys::TOGGLE_FULLSCREEN_KEYS],
    ["ReloadTheme", Keys::RELOAD_THEME_KEYS],
    ["SaveAsImage", Keys::SAVE_AS_IMAGE_KEYS],
    ["Iconify", Keys::ICONIFY_KEYS],
    ["ToggleIndexMode", Keys::TOGGLE_INDEX_MODE_KEYS],
    ["CacheAllSlides", Keys::CACHE_ALL_SLIDES_KEYS],
    ["SearchSlideForward", Keys::SEARCH_SLIDE_FORWARD_KEYS],
    ["SearchSlideBackward", Keys::SEARCH_SLIDE_BACKWARD_KEYS],
    ["SearchSlideForwardNext", Keys::SEARCH_SLIDE_FORWARD_NEXT_KEYS],
  ].each do |action_name, keys|
    set_keys(action_name, nil, keys, mod)
  end
end

# File lib/rabbit/key-handler.rb, line 336
def init_shift_keys
  mod = Gdk::ModifierType::SHIFT_MASK
  [
    ["ToggleWhiteout", Keys::Shift::WHITE_OUT_KEYS],
    ["ToggleBlackout", Keys::Shift::BLACK_OUT_KEYS],
    ["ExpandHole", Keys::Shift::EXPAND_HOLE_KEYS],
    ["NarrowHole", Keys::Shift::NARROW_HOLE_KEYS],
    ["ToggleGraffitiMode", Keys::Shift::TOGGLE_GRAFFITI_MODE_KEYS],
    ["SearchSlideBackwardNext",
     Keys::Shift::SEARCH_SLIDE_BACKWARD_NEXT_KEYS],
    ["ToggleInfoWindow", Keys::Shift::TOGGLE_INFO_WINDOW_KEYS],
  ].each do |action_name, keys|
    set_keys(action_name, nil, keys, mod)
  end
end

# File lib/rabbit/key-handler.rb, line 91
def init_shortcuts
  @shortcuts = Gio::ListStore.new(Gtk::Shortcut)
  @shortcut_controller = Gtk::ShortcutController.new(@shortcuts)
  init_keys
end

# File lib/rabbit/key-handler.rb, line 178
def init_toggle_terminal_accel_group
  @toggle_terminal_accel_group = Gtk::AccelGroup.new
  mod = Gdk::ModifierType::SHIFT_MASK |
        Gdk::ModifierType::CONTROL_MASK |
        Gdk::ModifierType::ALT_MASK
  keys = Keys::ShiftControlAlt::TOGGLE_TERMINAL_KEYS
  set_keys("ToggleTerminal",
           nil,
           keys,
           mod,
           nil,
           @toggle_terminal_accel_group)
end

# File lib/rabbit/key-handler.rb, line 97
def init_toggle_terminal_shortcuts
  @toggle_terminal_shortcuts = Gio::ListStore.new(Gtk::Shortcut)
  @toggle_terminal_shortcut_controller =
    Gtk::ShortcutController.new(@toggle_terminal_shortcuts)
  keys = Keys::ShiftControlAlt::TOGGLE_TERMINAL_KEYS
  modifiers = Gdk::ModifierType::SHIFT_MASK |
              Gdk::ModifierType::CONTROL_MASK |
              Gdk::ModifierType::ALT_MASK
  set_keys("ToggleTerminal",
           nil,
           keys,
           modifiers,
           @toggle_terminal_shortcuts)
end

# File lib/rabbit/key-handler.rb, line 53
def post_terminal
  @window.add_controller(@shortcut_controller)
  @window.add_controller(@user_shortcut_controller)
end

# File lib/rabbit/key-handler.rb, line 48
def pre_terminal
  @window.remove_controller(@user_shortcut_controller)
  @window.remove_controller(@shortcut_controller)
end

# File lib/rabbit/key-handler.rb, line 210
def set_key_press_event
  # We can't use Gtk::AccelGroup with unmodified direction
  # keys. See gtk_accelerator_valid() for details.
  prev_keys = [
    Gdk::Keyval::KEY_Up,
    Gdk::Keyval::KEY_Left,
    Gdk::Keyval::KEY_KP_Up,
    Gdk::Keyval::KEY_KP_Left,
  ]
  next_keys = [
    Gdk::Keyval::KEY_Right,
    Gdk::Keyval::KEY_Down,
    Gdk::Keyval::KEY_KP_Right,
    Gdk::Keyval::KEY_KP_Down,
  ]
  @key_press_event_id = @window.signal_connect("key_press_event") do |_widget, event|
    handled = true
    modifier = event.state
    case event.keyval
    when *prev_keys
      if have_slide_number_related_mask?(modifier)
        index = calc_slide_number(0, modifier)
        @canvas.activate("JumpToRelativeSlide",
                         GLib::Variant.new(-index, "i"))
      else
        @canvas.activate("PreviousSlide")
      end
    when *next_keys
      if have_slide_number_related_mask?(modifier)
        index = calc_slide_number(0, modifier)
        @canvas.activate("JumpToRelativeSlide",
                         GLib::Variant.new(index, "i"))
      else
        @canvas.activate("NextSlide")
      end
    else
      handled = false
    end
    handled
  end
end

# File lib/rabbit/key-handler.rb, line 112
def set_keys(action_name,
             action_arguments,
             keys,
             modifiers,
             shortcuts=@shortcuts)
  keys.each do |key|
    trigger = Gtk::KeyvalTrigger.new(key, modifiers)
    action = Gtk::NamedAction.new("rabbit.#{action_name}")
    shortcut = Gtk::Shortcut.new(trigger, action)
    shortcut.arguments = action_arguments
    shortcuts.append(shortcut)
  end
end