Class: VSourceView

Inherits:
GtkSource::View
  • Object
show all
Defined in:
lib/vimamsa/gui_sourceview.rb,
lib/vimamsa/gui_sourceview_autocomplete.rb

Overview

class VSourceView < Gtk::TextView

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title, bufo) ⇒ VSourceView

def initialize(title = nil,bufo=nil)



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# File 'lib/vimamsa/gui_sourceview.rb', line 7

def initialize(title, bufo)
  # super(:toplevel)
  @highlight_matching_brackets = true
  @idle_func_running = false
  super()
  @bufo = bufo #object of Buffer class (buffer.rb)
  debug "vsource init"
  @last_keyval = nil
  @last_event = [nil, nil]
  @removed_controllers = []
  self.highlight_current_line = true

  @tt = nil

  # Mainly after page-up or page-down
  signal_connect("move-cursor") do |widget, event|
    # if event.name == "GTK_MOVEMENT_PAGES" and (vma.actions.last_action == "page_up" or vma.actions.last_action == "page_down")
    # handle_scrolling()
    # end

    # handle_scrolling()
    # curpos = buffer.cursor_position
    # debug "MOVE CURSOR (sig): #{curpos}"

    # run_as_idle proc {
    # curpos = buffer.cursor_position
    # debug "MOVE CURSOR (sig2): #{curpos}"
    # }

    false
  end

  return

  signal_connect "button-release-event" do |widget, event|
    vma.buf.set_pos(buffer.cursor_position)
    false
  end
  @curpos_mark = nil
end

Instance Attribute Details

#autocp_active ⇒ Object

Returns the value of attribute autocp_active.



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# File 'lib/vimamsa/gui_sourceview.rb', line 3

def autocp_active
  @autocp_active
end

#bufo ⇒ Object

Returns the value of attribute bufo.



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# File 'lib/vimamsa/gui_sourceview.rb', line 3

def bufo
  @bufo
end

#cpl_list ⇒ Object

Returns the value of attribute cpl_list.



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# File 'lib/vimamsa/gui_sourceview.rb', line 3

def cpl_list
  @cpl_list
end

Instance Method Details

#after_action ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 555

def after_action
  iterate_gui_main_loop
  handle_deltas
  iterate_gui_main_loop
  draw_cursor
  iterate_gui_main_loop
end

#autocp_exit ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 84

def autocp_exit
  @autocp_items = []
  @autocp_active = true
  hide_completions
end

#autocp_hilight(id) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 64

def autocp_hilight(id)
  l = @autocp_items[id]
  l.set_text("<span foreground='#00ff00' weight='ultrabold'>#{cpl_list[id]}</span>")
  l.use_markup = true
end

#autocp_select ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 50

def autocp_select
  return if !@autocp_active
  bufo.complete_current_word(@cpl_list[@autocp_selected])
  autocp_exit
end

#autocp_select_next ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 76

def autocp_select_next
  return if @autocp_selected >= cpl_list.size - 1
  debug "autocp_select_next", 2
  autocp_unhilight(@autocp_selected)
  @autocp_selected += 1
  autocp_hilight(@autocp_selected)
end

#autocp_select_previous ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 56

def autocp_select_previous
  return if @autocp_selected <= 0
  autocp_hilight(@autocp_selected)
  autocp_unhilight(@autocp_selected)
  @autocp_selected -= 1
  autocp_hilight(@autocp_selected)
end

#autocp_unhilight(id) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 70

def autocp_unhilight(id)
  l = @autocp_items[id]
  l.set_text("<span>#{cpl_list[id]}</span>")
  l.use_markup = true
end

#check_controllers ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 66

def check_controllers
  clist = self.observe_controllers
  to_remove = []
  (0..(clist.n_items - 1)).each { |x|
    ctr = clist.get_item(x)
    # Sometimes a GestureClick EventController appears from somewhere
    # not initiated from this file.

    # TODO: Check which of these are needed:
    # puts ctr.class
    # Gtk::DropTarget
    # Gtk::EventControllerFocus
    # Gtk::EventControllerKey
    # Gtk::EventControllerMotion
    # Gtk::EventControllerScroll
    # Gtk::GestureClick
    # Gtk::GestureDrag
    # Gtk::ShortcutController

    if ![@click, @dt].include?(ctr) and [Gtk::DropControllerMotion, Gtk::DropTarget, Gtk::GestureDrag, Gtk::GestureClick, Gtk::EventControllerKey].include?(ctr.class)
      to_remove << ctr
    end
  }
  if to_remove.size > 0
    to_remove.each { |x|
      # To avoid GC. https://github.com/ruby-gnome/ruby-gnome/issues/15790
      @removed_controllers << x
      self.remove_controller(x)
    }
  end
end

#coord_to_iter(xloc, yloc, transform_coord = false) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 249

def coord_to_iter(xloc, yloc, transform_coord = false)
  if transform_coord
    xloc = (xloc - gutter_width).to_i
    yloc = (yloc + visible_rect.y).to_i
  end

  # Try to get exact character position
  i = get_iter_at_location(xloc, yloc)

  # If doesn't work, at least get the start of correct line
  # TODO: sometimes end of line is better choice
  if i.nil?
    r = get_line_at_y(yloc)
    i = r[0] if !r.nil?
  end

  return i.offset if !i.nil?
  return nil
end

#cur_pos_xy ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 430

def cur_pos_xy
  return pos_to_coord(buffer.cursor_position)
end

#cursor_visible_idle_func ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 498

def cursor_visible_idle_func
  # return false
  debug "cursor_visible_idle_func"
  # From https://picheta.me/articles/2013/08/gtk-plus--a-method-to-guarantee-scrolling.html

  # This is not the current buffer
  return false if vma.gui.view != self

  sleep(0.01)
  # intr = iterxy.intersect(vr)
  if is_cursor_visible == false
    # set_cursor_pos(buffer.cursor_position)

    itr = buffer.get_iter_at(:offset => buffer.cursor_position)

    within_margin = 0.075 #margin as a [0.0,0.5) fraction of screen size
    use_align = false
    xalign = 0.5 #0.0=top 1.0=bottom, 0.5=center
    yalign = 0.5

    scroll_to_iter(itr, within_margin, use_align, xalign, yalign)

    return true # Call this func again
  else
    @idle_func_running = false
    return false # Don't call this idle func again
  end
end

#draw_cursor ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 580

def draw_cursor
  sv = vma.gui.active_window[:sw].child
  return if sv.nil?
  if sv != self # if we are not the current buffer
    sv.draw_cursor
    return
  end

  mode = vma.kbd.get_mode
  ctype = vma.kbd.get_cursor_type
  ctype = :visual if vma.buf.selection_active?

  if [:command, :replace, :browse].include?(ctype)
    set_cursor_color(ctype)

    if !self.overwrite?
      self.overwrite = true

      # (Via trial and error) This combination is needed to make cursor visible:
      # TODO: determine why "self.cursor_visible = true" is not enough
      self.cursor_visible = false
      self.cursor_visible = true
    end
  elsif ctype == :visual
    set_cursor_color(ctype)
    # debug "VISUAL MODE"
    (_start, _end) = @bufo.get_visual_mode_range2
    # debug "#{_start}, #{_end}"
    itr = buffer.get_iter_at(:offset => _start)
    itr2 = buffer.get_iter_at(:offset => _end + 1)
    # Pango-CRITICAL **: pango_layout_get_cursor_pos: assertion 'index >= 0 && index <= layout->length' failed
    buffer.select_range(itr, itr2)
  elsif ctype == :insert
    set_cursor_color(ctype)
    self.overwrite = false
    debug "INSERT MODE"
  else # TODO
  end

  if [:insert, :command, :replace, :browse].include?(ctype)
    # Place cursor where it already is
    # Without this hack, the cursor doesn't always get drawn
    pos = @bufo.pos
    itr = buffer.get_iter_at(:offset => pos)
    buffer.place_cursor(itr)
  end

  # Sometimes we lose focus and the cursor vanishes because of that
  # TODO: determine why&when
  if !self.has_focus?
    self.grab_focus
    self.cursor_visible = false
    self.cursor_visible = true
  end
end

#ensure_cursor_visible ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 544

def ensure_cursor_visible
  # return
  debug "@idle_func_running=#{@idle_func_running}"
  return if @idle_func_running
  if is_cursor_visible == false
    @idle_func_running = true
    debug "Starting idle func"
    GLib::Idle.add(proc { cursor_visible_idle_func })
  end
end

#focus_in ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 105

def focus_in()
  set_cursor_color(@ctype)
  self.cursor_visible = false
  self.cursor_visible = true
  self.grab_focus
end

#focus_out ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 98

def focus_out()
  set_cursor_color(:inactive)

  # This does not seem to work: (TODO:why?)
  # self.cursor_visible = false
end

#gutter_width ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 52

def gutter_width()
  winwidth = width
  view_width = visible_rect.width
  gutter_width = winwidth - view_width
end

#handle_deltas ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 434

def handle_deltas()
  any_change = false
  while d = @bufo.deltas.shift
    any_change = true
    pos = d[0]
    op = d[1]
    num = d[2]
    txt = d[3]
    if op == DELETE
      startiter = buffer.get_iter_at(:offset => pos)
      enditer = buffer.get_iter_at(:offset => pos + num)
      buffer.delete(startiter, enditer)
    elsif op == INSERT
      startiter = buffer.get_iter_at(:offset => pos)
      buffer.insert(startiter, txt)
    end
  end
  if any_change
    #TODO: only when necessary
    self.set_cursor_pos(pos)
  end

  # sanity_check #TODO
end

#handle_key_event(keyval, keyname, sig) ⇒ Object

def handle_key_event(event, sig)



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# File 'lib/vimamsa/gui_sourceview.rb', line 301

def handle_key_event(keyval, keyname, sig)
  if $update_cursor
    handle_scrolling
  end
  debug $view.visible_rect.inspect

  debug "key event" + [keyval, @last_keyval, keyname, sig].to_s
  # debug event

  # key_name = event.string
  #TODO:??
  # if event.state.control_mask?
  # key_name = Gdk::Keyval.to_name(event.keyval)
  # Gdk::Keyval.to_name()
  # end

  keyval_trans = {}
  keyval_trans[Gdk::Keyval::KEY_Control_L] = "ctrl"
  keyval_trans[Gdk::Keyval::KEY_Control_R] = "ctrl"

  keyval_trans[Gdk::Keyval::KEY_Escape] = "esc"

  keyval_trans[Gdk::Keyval::KEY_Return] = "enter"
  keyval_trans[Gdk::Keyval::KEY_ISO_Enter] = "enter"
  keyval_trans[Gdk::Keyval::KEY_KP_Enter] = "enter"
  keyval_trans[Gdk::Keyval::KEY_Alt_L] = "alt"
  keyval_trans[Gdk::Keyval::KEY_Alt_R] = "alt"
  keyval_trans[Gdk::Keyval::KEY_Caps_Lock] = "caps"

  keyval_trans[Gdk::Keyval::KEY_BackSpace] = "backspace"
  keyval_trans[Gdk::Keyval::KEY_KP_Page_Down] = "pagedown"
  keyval_trans[Gdk::Keyval::KEY_KP_Page_Up] = "pageup"
  keyval_trans[Gdk::Keyval::KEY_Page_Down] = "pagedown"
  keyval_trans[Gdk::Keyval::KEY_Page_Up] = "pageup"
  keyval_trans[Gdk::Keyval::KEY_Left] = "left"
  keyval_trans[Gdk::Keyval::KEY_Right] = "right"
  keyval_trans[Gdk::Keyval::KEY_Down] = "down"
  keyval_trans[Gdk::Keyval::KEY_Up] = "up"
  keyval_trans[Gdk::Keyval::KEY_space] = "space"

  keyval_trans[Gdk::Keyval::KEY_Shift_L] = "shift"
  keyval_trans[Gdk::Keyval::KEY_Shift_R] = "shift"
  keyval_trans[Gdk::Keyval::KEY_Tab] = "tab"
  keyval_trans[Gdk::Keyval::KEY_ISO_Left_Tab] = "tab"

  key_trans = {}
  key_trans["\e"] = "esc"
  tk = keyval_trans[keyval]
  keyname = tk if !tk.nil?

  key_str_parts = []
  key_str_parts << "ctrl" if vma.kbd.modifiers[:ctrl]
  key_str_parts << "alt" if vma.kbd.modifiers[:alt]
  key_str_parts << "shift" if vma.kbd.modifiers[:shift]
  key_str_parts << "meta" if vma.kbd.modifiers[:meta]
  key_str_parts << "super" if vma.kbd.modifiers[:super]
  key_str_parts << keyname

  # After remapping capslock to control in gnome-tweak tool,
  # if pressing and immediately releasing the capslock (control) key,
  # we get first "caps" on keydown and ctrl-"caps" on keyup (keyval 65509, Gdk::Keyval::KEY_Caps_Lock)
  # If mapping capslock to ctrl in hardware, we get keyval 65507 (Gdk::Keyval::KEY_Control_L) instead
  if key_str_parts[0] == "ctrl" and key_str_parts[1] == "caps"
    # Replace ctrl-caps with ctrl
    key_str_parts.delete_at(1)
  end

  if key_str_parts[0] == key_str_parts[1]
    # We don't want "ctrl-ctrl" or "alt-alt"
    # TODO:There should be a better way to do this
    key_str_parts.delete_at(0)
  end

  if key_str_parts[0] == "shift" and key_str_parts.size == 2
    if key_str_parts[1].size == 1 # and key_str_parts[1].match(/^[[:upper:]]$/)
      #"shift-P" to just "P" etc.
      # but keep shift-tab as is
      key_str_parts.delete_at(0)
    end
  end

  key_str = key_str_parts.join("-")
  if key_str == "\u0000"
    key_str = ""
  end

  keynfo = { :key_str => key_str, :key_name => keyname, :keyval => keyval }
  debug keynfo.inspect
  # vma.kbd.match_key_conf(key_str, nil, :key_press)
  # debug "key_str=#{key_str} key_"

  if key_str != "" # or prefixed_key_str != ""
    if sig == :key_release and keyval == @last_keyval
      vma.kbd.match_key_conf(key_str + "!", nil, :key_release)
      @last_event = [keynfo, :key_release]
    elsif sig == :key_press
      vma.kbd.match_key_conf(key_str, nil, :key_press)
      @last_event = [keynfo, key_str, :key_press]
    end
  end
  @last_keyval = keyval

  handle_deltas

  # set_focus(5)
  # false

  draw_cursor #TODO: only when needed
end

#handle_scrolling ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 269

def handle_scrolling()
  return # TODO
  # curpos = buffer.cursor_position
  # debug "MOVE CURSOR: #{curpos}"
  return nil if vma.gui.nil?
  return nil if @bufo.nil?
  vma.gui.run_after_scrolling proc {
    debug "START UPDATE POS AFTER SCROLLING", 2
    bc = window_to_buffer_coords(Gtk::TextWindowType::WIDGET, gutter_width + 2, 60)
    if !bc.nil?
      i = coord_to_iter(bc[0], bc[1])
      if !i.nil?
        @bufo.set_pos(i)
      end
    end
    $update_cursor = false
  }
end

#hide_completions ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 43

def hide_completions
  if @acwin.class == Gtk::Popover
    @acwin.hide
  end
  @autocp_active = false
end

#is_cursor_visible ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 527

def is_cursor_visible
  vr = visible_rect
  iter = buffer.get_iter_at(:offset => buffer.cursor_position)
  iterxy = get_iter_location(iter)
  iterxy.width = 1 if iterxy.width == 0
  iterxy.height = 1 if iterxy.height == 0

  intr = iterxy.intersect(vr)
  if intr.nil?
    debug iterxy.inspect
    debug vr.inspect
    return false
  else
    return true
  end
end

#pos_to_coord(i) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 411

def pos_to_coord(i)
  b = buffer
  iter = b.get_iter_at(:offset => i)
  iterxy = get_iter_location(iter)
  winw = width #TODO

  view_width = visible_rect.width
  gutter_width = winw - view_width #TODO

  x = iterxy.x + gutter_width
  y = iterxy.y

  # buffer_to_window_coords(Gtk::TextWindowType::TEXT, iterxy.x, iterxy.y).inspect
  # debug buffer_to_window_coords(Gtk::TextWindowType::TEXT, x, y).inspect
  (x, y) = buffer_to_window_coords(Gtk::TextWindowType::TEXT, x, y)

  return [x, y]
end

#register_signals ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 112

def register_signals()
  check_controllers

  # TODO: accept GLib::Type::STRING also?
  @dt = Gtk::DropTarget.new(GLib::Type["GFile"], [Gdk::DragAction::COPY, Gdk::DragAction::MOVE])
  # GLib::Type::INVALID

  self.add_controller(@dt)
  @dt.signal_connect "drop" do |obj, v, x, y|
    if v.value.gtype == GLib::Type["GLocalFile"]
      uri = v.value.uri
    elsif v.value.class == String
      uri = v.value.gsub(/\r\n$/, "")
    end
    debug "dt,drop #{v.value},#{x},#{y}", 2
    fp = uri_to_path(uri)
    buf.handle_drag_and_drop(fp) if !fp.nil?
    true
  end

  @dt.signal_connect "enter" do |gesture, x, y, z, m|
    debug "dt,enter", 2
    Gdk::DragAction::COPY
  end

  @dt.signal_connect "motion" do |obj, x, y|
    debug "dt,move", 2

    Gdk::DragAction::COPY
  end

  # dc = Gtk::DropControllerMotion.new
  # self.add_controller(dc)
  # dc.signal_connect "enter" do |gesture, x, y|
  # debug "enter", 2
  # debug [x, y]
  # # Ripl.start :binding => binding
  # true
  # end

  # dc.signal_connect "motion" do |gesture, x, y|
  # debug "move", 2
  # debug [x, y]
  # true
  # end

  # Implement mouse selections using @cnt_mo and @cnt_drag
  @cnt_mo = Gtk::EventControllerMotion.new
  self.add_controller(@cnt_mo)
  @cnt_mo.signal_connect "motion" do |gesture, x, y|
    if !@range_start.nil? and !x.nil? and !y.nil? and buf.visual_mode?
      i = coord_to_iter(x, y, true)
      @bufo.set_pos(i) if !i.nil? and @last_iter != i
      @last_iter = i
    end
  end

  @last_coord = nil
  @cnt_drag = Gtk::GestureDrag.new
  self.add_controller(@cnt_drag)
  @cnt_drag.signal_connect "drag-begin" do |gesture, x, y|
    debug "drag-begin", 2
    i = coord_to_iter(x, y, true)
    pp i
    @range_start = i
    buf.start_selection
  end

  @cnt_drag.signal_connect "drag-end" do |gesture, offsetx, offsety|
    debug "drag-end", 2
    if offsetx.abs < 5 and offsety.abs < 5
      debug "Not enough drag", 2
      buf.end_selection
      # elsif !buf.visual_mode? and vma.kbd.get_scope != :editor
    elsif vma.kbd.get_scope != :editor
      # Can't transition from editor wide mode to buffer specific mode
      vma.kbd.set_mode(:visual)
    else
      buf.end_selection
    end
    @range_start = nil
  end

  click = Gtk::GestureClick.new
  click.set_propagation_phase(Gtk::PropagationPhase::CAPTURE)
  self.add_controller(click)
  # Detect mouse click
  @click = click

  @range_start = nil
  click.signal_connect "pressed" do |gesture, n_press, x, y, z|
    debug "SourceView, GestureClick released x=#{x} y=#{y}"

    if buf.visual_mode?
      buf.end_visual_mode
    end

    xloc = (x - gutter_width).to_i
    yloc = (y + visible_rect.y).to_i
    debug "xloc=#{xloc} yloc=#{yloc}"

    i = coord_to_iter(xloc, yloc)
    # @range_start = i

    # This needs to happen after xloc calculation, otherwise xloc gets a wrong value (around 200 bigger)
    if vma.gui.current_view != self
      vma.gui.set_current_view(self)
    end

    @bufo.set_pos(i) if !i.nil?
    true
  end

  click.signal_connect "released" do |gesture, n_press, x, y, z|
    debug "SourceView, GestureClick released x=#{x} y=#{y}"

    xloc = (x - gutter_width).to_i
    yloc = (y + visible_rect.y).to_i
    debug "xloc=#{xloc} yloc=#{yloc}"

    # This needs to happen after xloc calculation, otherwise xloc gets a wrong value (around 200 bigger)
    if vma.gui.current_view != self
      vma.gui.set_current_view(self)
    end

    i = coord_to_iter(xloc, yloc)

    # if i != @range_start
    # debug "RANGE #{[@range_start, i]}", 2
    # end

    @bufo.set_pos(i) if !i.nil?
    # @range_start = nil
    true
  end
end

#sanity_check ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 459

def sanity_check()
  a = buffer.text
  b = buf.to_s
  # debug "===================="
  # debug a.lines[0..10].join()
  # debug "===================="
  # debug b.lines[0..10].join()
  # debug "===================="
  if a == b
    debug "Buffers match"
  else
    debug "ERROR: Buffer's don't match."
  end
end

#set_content(str) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 48

def set_content(str)
  self.buffer.set_text(str)
end

#set_cursor_color(ctype) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 563

def set_cursor_color(ctype)
  if @ctype != ctype
    bg = $confh[:mode][ctype][:cursor][:background]
    if bg.class == String
      if !@cursor_prov.nil?
        self.style_context.remove_provider(@cursor_prov)
      end
      prov = Gtk::CssProvider.new
      # prov.load(data: ".view text selection { background-color: #{bg}; color: #ffffff; }")
      prov.load(data: ".view text selection { background-color: #{bg}; color: #ffffff; } .view { caret-color: #{bg};  }")
      self.style_context.add_provider(prov)
      @cursor_prov = prov
    end
    @ctype == ctype
  end
end

#set_cursor_pos(pos) ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 474

def set_cursor_pos(pos)
  itr = buffer.get_iter_at(:offset => pos)
  itr2 = buffer.get_iter_at(:offset => pos + 1)
  buffer.place_cursor(itr)

  within_margin = 0.075 #margin as a [0.0,0.5) fraction of screen size
  use_align = false
  xalign = 0.5 #0.0=top 1.0=bottom, 0.5=center
  yalign = 0.5

  if @curpos_mark.nil?
    @curpos_mark = buffer.create_mark("cursor", itr, false)
  else
    buffer.move_mark(@curpos_mark, itr)
  end
  scroll_to_mark(@curpos_mark, within_margin, use_align, xalign, yalign)
  $idle_scroll_to_mark = true
  ensure_cursor_visible

  # draw_cursor

  return true
end

#set_cursor_to_top ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 288

def set_cursor_to_top
  debug "set_cursor_to_top", 2
  bc = window_to_buffer_coords(Gtk::TextWindowType::WIDGET, gutter_width + 2, 60)
  if !bc.nil?
    i = coord_to_iter(bc[0], bc[1])
    if !i.nil?
      @bufo.set_pos(i)
      set_cursor_pos(i)
    end
  end
end

#show_completions ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 93

def show_completions
  hide_completions
  bu = vma.buf
  (w, range) = bu.get_word_in_pos(bu.pos - 1, boundary: :word)
  debug [w, range].to_s, 2
  matches = Autocomplete.matching_words w
  return if matches.empty?
  @autocp_active = true
  @cpl_list = cpl_list = matches
  win = Gtk::Popover.new()
  win.parent = self
  vbox = Gtk::Grid.new()
  win.set_child(vbox)

  i = 0
  @autocp_items = []
  @autocp_selected = 0
  for x in cpl_list
    l = Gtk::Label.new(x)
    @autocp_items << l
    # numbers: left, top, width, height
    vbox.attach(l, 0, i, 1, 1)
    i += 1
  end
  autocp_hilight(0)
  (x, y) = cur_pos_xy
  rec = Gdk::Rectangle.new(x, y + 8, 10, 10)
  win.has_arrow = false
  win.set_pointing_to(rec)
  win.autohide = false
  win.popup
  gui_remove_controllers(win)
  @acwin = win
end

#show_controllers ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview.rb', line 58

def show_controllers
  clist = self.observe_controllers
  (0..(clist.n_items - 1)).each { |x|
    ctr = clist.get_item(x)
    pp ctr
  }
end

#start_autocomplete ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 128

def start_autocomplete
  return
  # Roughly following these examples:
  # https://stackoverflow.com/questions/52359721/howto-maintain-gtksourcecompletion-when-changing-buffers-in-a-gtksourceview
  # and gedit-plugins-41.0/plugins/wordcompletion/gedit-word-completion-plugin.c
  # .. but it doesn't work. So implementing using Popover.
  # Keeping this for reference

  cp = self.completion
  prov = GtkSource::CompletionWords.new("Autocomplete") # (name,icon)
  prov.register(self.buffer)
  cp.add_provider(prov)
  pp prov
  self.show_completion
end

#try_autocomplete ⇒ Object 



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# File 'lib/vimamsa/gui_sourceview_autocomplete.rb', line 90

def try_autocomplete
end