Class: CommandT::MatchWindow

Inherits:
Object
  • Object
show all
Defined in:
lib/command-t/match_window.rb

Defined Under Namespace

Classes: Highlight

Constant Summary collapse

SELECTION_MARKER = 
'> '
MARKER_LENGTH = 
SELECTION_MARKER.length
UNSELECTED_MARKER = 
' ' * MARKER_LENGTH
MH_START = 
'<commandt>'
MH_END = 
'</commandt>'
@@buffer = 
nil

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ MatchWindow

Returns a new instance of MatchWindow.



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# File 'lib/command-t/match_window.rb', line 17

def initialize(options = {})
  @encoding        = options[:encoding]
  @highlight_color = options[:highlight_color] || 'PmenuSel'
  @min_height      = options[:min_height]
  @prompt          = options[:prompt]
  @reverse_list    = options[:match_window_reverse]

  quoted_name = VIM::escape_for_single_quotes(options[:name])
  escaped_name = ::VIM::evaluate("fnameescape('#{quoted_name}')")

  run_will_show_autocmd

  set 'timeout', true        # ensure mappings timeout
  set 'hlsearch', false      # don't highlight search strings
  set 'insertmode', false    # don't make Insert mode the default
  set 'showcmd', false       # don't show command info on last line
  set 'equalalways', false   # don't auto-balance window sizes
  set 'timeoutlen', 0        # respond immediately to mappings
  set 'report', 9999         # don't show "X lines changed" reports
  set 'scrolloff', 0         # don't scroll near buffer edges
  set 'sidescroll', 0        # don't sidescroll in jumps
  set 'sidescrolloff', 0     # don't sidescroll automatically

  if options[:debounce_interval] > 0
    set 'updatetime', options[:debounce_interval]
  end

  # Save existing window views so we can restore them later.
  current_window = ::VIM::evaluate('winnr()')
  @windows = (0..(::VIM::Window.count - 1)).map do |i|
    focus_window(i + 1)
    view = ::VIM::evaluate('winsaveview()')
    window = OpenStruct.new(
      :index    => i,
      :height   => ::VIM::Window[i].height,
      :width    => ::VIM::Window[i].width,
      :lnum     => view['lnum'],
      :col      => view['col'],
      :coladd   => view['coladd'],
      :curswant => view['curswant'],
      :topline  => view['topline'],
      :topfill  => view['topfill'],
      :leftcol  => view['leftcol'],
      :skipcol  => view['skipcol']
    )

    # When creating a split for the match window, move the cursor to the
    # opposite side of the window's viewport to prevent unwanted scrolling.
    boundary_line = options[:match_window_at_top] ?
      ::VIM::evaluate("line('w$')") :
      view['topline']
    ::VIM::evaluate("winrestview({'lnum': #{boundary_line}})")

    window
  end
  focus_window(current_window)

  # show match window
  split_location = options[:match_window_at_top] ? 'topleft' : 'botright'
  if ((number = buffer_number)) # still have buffer from last time
    ::VIM::command "silent! #{split_location} #{number}sbuffer"
    if $curbuf.number != number
      raise "Can't re-open Command-T match listing buffer"
    end
    $curwin.height = 1
    ::VIM::command "0file"
    ::VIM::command "keepalt file #{escaped_name}"
  else        # creating match window for first time and set it up
    ::VIM::command "silent! keepalt #{split_location} 1split #{escaped_name}"
    set 'bufhidden', 'unload'   # unload buf when no longer displayed
    set 'buftype', 'nofile'     # buffer is not related to any file
    set 'filetype', 'command-t' # provide for detectability/extensibility
    set 'modifiable', false     # prevent manual edits
    set 'readonly', false       # avoid W10 "Changing a readonly file"
    set 'swapfile', false       # don't create a swapfile
    set 'wrap', false           # don't soft-wrap
    set 'number', false         # don't show line numbers
    set 'list', false           # don't use List mode (visible tabs etc)
    set 'foldcolumn', 0         # don't show a fold column at side
    set 'foldlevel', 99         # don't fold anything
    set 'cursorline', false     # don't highlight line cursor is on
    set 'spell', false          # spell-checking off
    set 'buflisted', false      # don't show up in the buffer list
    set 'textwidth', 0          # don't hard-wrap (break long lines)

    # don't show the color column
    set 'colorcolumn', 0 if VIM::exists?('+colorcolumn')

    # don't show relative line numbers
    set 'relativenumber', false if VIM::exists?('+relativenumber')

    # sanity check: make sure the buffer really was created
    if File.basename($curbuf.name) != options[:name]
      raise "Can't find Command-T match listing buffer"
    end
    @@buffer = $curbuf
  end

  # syntax coloring
  if VIM::has?('syntax')
    ::VIM::command "syntax match CommandTSelection \"^#{SELECTION_MARKER}.\\+$\""
    ::VIM::command 'syntax match CommandTNoEntries "^-- NO MATCHES --$"'
    ::VIM::command 'syntax match CommandTNoEntries "^-- NO SUCH FILE OR DIRECTORY --$"'
    set 'synmaxcol', 9999

    if VIM::has?('conceal')
      set 'conceallevel', 2
      set 'concealcursor', 'nvic'
      ::VIM::command 'syntax region CommandTCharMatched ' \
                     "matchgroup=CommandTCharMatched start=+#{MH_START}+ " \
                     "matchgroup=CommandTCharMatchedEnd end=+#{MH_END}+ concealends"
      ::VIM::command 'highlight def CommandTCharMatched ' \
                     'term=bold,underline cterm=bold,underline ' \
                     'gui=bold,underline'
    end

    ::VIM::command "highlight link CommandTSelection #{@highlight_color}"
    ::VIM::command 'highlight link CommandTNoEntries Error'

    # hide cursor
    @cursor_highlight = get_cursor_highlight
    hide_cursor
  end

  # perform cleanup using an autocmd to ensure we don't get caught out
  # by some unexpected means of dismissing or leaving the Command-T window
  # (eg. <C-W q>, <C-W k> etc)
  ::VIM::command 'augroup CommandTMatchWindow'
  ::VIM::command 'autocmd!'
  ::VIM::command 'autocmd BufLeave <buffer> silent! ruby $command_t.leave'
  ::VIM::command 'autocmd BufUnload <buffer> silent! ruby $command_t.unload'
  ::VIM::command 'augroup END'

  @has_focus  = false
  @abbrev     = ''
  @window     = $curwin
end

Instance Method Details

#add!(char) ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 205

def add!(char)
  @abbrev += char
end

#backspace! ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 209

def backspace!
  @abbrev.chop!
end

#buffer_number ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 155

def buffer_number
  @@buffer && @@buffer.number
rescue Vim::DeletedBufferError
  # Beware of people manually deleting Command-T's hidden, unlisted buffer.
  @@buffer = nil
end

#close ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 162

def close
  # Unlisted buffers like those provided by Netrw, NERDTree and Vim's help
  # don't actually appear in the buffer list; if they are the only such
  # buffers present when Command-T is invoked (for example, when invoked
  # immediately after starting Vim with a directory argument, like `vim .`)
  # then performing the normal clean-up will yield an "E90: Cannot unload
  # last buffer" error. We can work around that by doing a :quit first.
  if ::VIM::Buffer.count == 0
    ::VIM::command 'silent quit'
  end

  # Workaround for upstream bug in Vim 7.3 on some platforms
  #
  # On some platforms, $curbuf.number always returns 0. One workaround is
  # to build Vim with --disable-largefile, but as this is producing lots of
  # support requests, implement the following fallback to the buffer name
  # instead, at least until upstream gets fixed.
  #
  # For more details, see: https://wincent.com/issues/1617
  if $curbuf.number == 0
    # use bwipeout as bunload fails if passed the name of a hidden buffer
    base = File.basename($curbuf.name)
    escaped_name = ::VIM::evaluate("fnameescape('#{base}')")
    ::VIM::command "silent! bwipeout! #{escaped_name}"
    @@buffer = nil
  else
    ::VIM::command "silent! bunload! #{@@buffer.number}"
  end
end

#find(char) ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 248

def find(char)
  # is this a new search or the continuation of a previous one?
  now = Time.now
  if @last_key_time.nil? || @last_key_time < (now - 0.5)
    @find_string = char
  else
    @find_string += char
  end
  @last_key_time = now

  # see if there's anything up ahead that matches
  matches = @reverse_list ? @matches.reverse : @matches
  matches.each_with_index do |match, idx|
    if match[0, @find_string.length].casecmp(@find_string) == 0
      old_selection = @selection
      @selection = @reverse_list ? matches.length - idx - 1 : idx
      print_match(old_selection)  # redraw old selection (removes marker)
      print_match(@selection)     # redraw new selection (adds marker)
      break
    end
  end
end

#focus ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 230

def focus
  unless @has_focus
    @has_focus = true
    if VIM::has?('syntax')
      ::VIM::command 'highlight link CommandTSelection Search'
    end
  end
end

#leave ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 192

def leave
  close
  unload
end

#matches=(matches) ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 221

def matches=(matches)
  if matches != @matches
    @matches = matches
    @selection = 0
    print_matches
    move_cursor_to_selected_line
  end
end

#print_no_such_file_or_directory ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 276

def print_no_such_file_or_directory
  print_error 'NO SUCH FILE OR DIRECTORY'
end

#select_next ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 213

def select_next
  @reverse_list ? _prev : _next
end

#select_prev ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 217

def select_prev
  @reverse_list ? _next : _prev
end

#selection ⇒ Object

Returns the currently selected item as a String.



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# File 'lib/command-t/match_window.rb', line 272

def selection
  @matches[@selection]
end

#unfocus ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 239

def unfocus
  if @has_focus
    @has_focus = false
    if VIM::has?('syntax')
      ::VIM::command "highlight link CommandTSelection #{@highlight_color}"
    end
  end
end

#unload ⇒ Object 



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# File 'lib/command-t/match_window.rb', line 197

def unload
  restore_window_views
  @prompt.dispose
  @settings.restore
  show_cursor
  run_did_hide_autocmd
end