Class: Rvim::Screen

Inherits:
Object
  • Object
show all
Defined in:
lib/rvim/screen.rb

Constant Summary collapse

SMCUP = 
"\e[?1049h"
RMCUP = 
"\e[?1049l"
HIDE_CURSOR = 
"\e[?25l"
SHOW_CURSOR = 
"\e[?25h"
CLEAR = 
"\e[2J"
HOME = 
"\e[H"
REVERSE_ON = 
"\e[7m"
REVERSE_OFF = 
"\e[27m"
DIM_ON = 
"\e[2m"
DIM_OFF = 
"\e[22m"
DIFF_BG_ON = 
"\e[48;5;52m"
DIFF_BG_OFF = 
"\e[49m"
UNDERLINE_ON = 
"\e[4m"
UNDERLINE_OFF = 
"\e[24m"
ERASE_LINE = 
"\e[2K"
CURSOR_BLOCK =

DECSCUSR cursor shapes — match NeoVim’s default ‘guicursor’ for n: block, i/c: vertical bar, r: underline.

"\e[2 q"
CURSOR_BAR = 
"\e[6 q"
CURSOR_UNDERLINE = 
"\e[4 q"
MOUSE_ENABLE = 
"\e[?1000h\e[?1006h"
MOUSE_DISABLE = 
"\e[?1006l\e[?1000l"

Instance Method Summary collapse

Constructor Details

#initialize(editor) ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/rvim/screen.rb', line 27

def initialize(editor)
  @editor = editor
  @rows = 24
  @cols = 80
end

Instance Method Details

#content_width_for(win) ⇒ Object 



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# File 'lib/rvim/screen.rb', line 146

def content_width_for(win)
  return 0 unless win

  gw = gutter_width(win.buffer)
  [win.width - gw, 0].max
end

#cursor_shape_for_mode ⇒ Object 



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# File 'lib/rvim/screen.rb', line 136

def cursor_shape_for_mode
  if @editor.respond_to?(:replace_mode) && @editor.replace_mode
    CURSOR_UNDERLINE
  elsif @editor.prompt_mode || @editor.editing_mode_label == :vi_insert
    CURSOR_BAR
  else
    CURSOR_BLOCK
  end
end

#disable_mouse ⇒ Object 



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# File 'lib/rvim/screen.rb', line 68

def disable_mouse
  $stdout.write(MOUSE_DISABLE)
end

#enable_mouse ⇒ Object 



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# File 'lib/rvim/screen.rb', line 64

def enable_mouse
  $stdout.write(MOUSE_ENABLE)
end

#gutter_width_for(buffer) ⇒ Object 



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# File 'lib/rvim/screen.rb', line 72

def gutter_width_for(buffer)
  gutter_width(buffer)
end

#mouse_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rvim/screen.rb', line 60

def mouse_enabled?
  !@editor.settings.get(:mouse).to_s.empty?
end

#render ⇒ Object 



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# File 'lib/rvim/screen.rb', line 95

def render
  @rows, @cols = Reline::IOGate.get_screen_size
  reserved = @editor.prompt_mode == :listing ? list_overlay_rows + 1 : 1
  reserved_top = tabline_height
  layout_windows(@rows - reserved - reserved_top, @cols)
  if reserved_top.positive?
    @editor.windows.each { |w| w.row += reserved_top }
  end

  out = +HIDE_CURSOR
  out << render_title if @editor.settings.get(:title)
  out << render_tabline if reserved_top.positive?
  @editor.windows.each { |win| out << render_window(win) }
  out << render_vertical_dividers
  if @editor.prompt_mode == :listing
    out << render_listing_overlay
  end
  if @editor.cmdline_popup && !@editor.cmdline_popup.empty? && @editor.settings.get(:wildmenu)
    out << render_cmdline_popup
  end
  out << move_to(@rows, 1) << ERASE_LINE << bottom_line

  cw = @editor.current_window
  if @editor.prompt_mode
    out << move_to(@rows, @editor.prompt_buffer.length + 2)
  elsif cw
    gw = gutter_width(cw.buffer)
    content_width = cw.width - gw
    wrap_on = @editor.settings.get(:wrap)
    display_row_offset, display_col = cursor_display_position(cw, content_width, wrap_on)
    cursor_row = cw.row + display_row_offset + 1
    cursor_col = cw.col + gw + display_col + 1
    out << move_to(cursor_row, cursor_col)
  end
  out << cursor_shape_for_mode
  out << SHOW_CURSOR

  $stdout.write(out)
  $stdout.flush
end

#render_title ⇒ Object 



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# File 'lib/rvim/screen.rb', line 84

def render_title
  str = @editor.settings.get(:titlestring).to_s
  title = if str.empty?
            name = @editor.filepath ? File.basename(@editor.filepath) : '[No Name]'
            "#{name} - rvim"
          else
            str
          end
  "\e]0;#{title}\a"
end

#scroll_top ⇒ Object 



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# File 'lib/rvim/screen.rb', line 33

def scroll_top
  @editor.current_window&.scroll_top || 0
end

#scroll_top=(value) ⇒ Object 



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# File 'lib/rvim/screen.rb', line 37

def scroll_top=(value)
  @editor.current_window.scroll_top = value if @editor.current_window
end

#setup ⇒ Object 



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# File 'lib/rvim/screen.rb', line 44

def setup
  $stdout.write(SMCUP)
  $stdout.write(CLEAR)
  $stdout.write(HOME)
  enable_mouse if mouse_enabled?
  $stdout.flush
end

#split_segments_public(line, max_width) ⇒ Object 



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# File 'lib/rvim/screen.rb', line 153

def split_segments_public(line, max_width)
  split_line_segments(line, max_width)
end

#tabline_height ⇒ Object 



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# File 'lib/rvim/screen.rb', line 76

def tabline_height
  stal = @editor.settings.get(:showtabline).to_i
  return 0 if stal <= 0
  return 1 if stal >= 2
  # stal == 1: only when more than one tab
  @editor.tabs.size > 1 ? 1 : 0
end

#teardown ⇒ Object 



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# File 'lib/rvim/screen.rb', line 52

def teardown
  disable_mouse
  $stdout.write(CURSOR_BLOCK)
  $stdout.write(SHOW_CURSOR)
  $stdout.write(RMCUP)
  $stdout.flush
end