/
match_window.rb
361 lines (321 loc) · 12.1 KB
/
match_window.rb
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# Copyright 2010 Wincent Colaiuta. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
require 'ostruct'
require 'command-t/settings'
module CommandT
class MatchWindow
@@selection_marker = '> '
@@marker_length = @@selection_marker.length
@@unselected_marker = ' ' * @@marker_length
@@buffer = nil
def initialize options = {}
@prompt = options[:prompt]
# save existing window dimensions so we can restore them later
@windows = []
(0..(::VIM::Window.count - 1)).each do |i|
window = OpenStruct.new :index => i, :height => ::VIM::Window[i].height
@windows << window
end
# global settings (must manually save and restore)
@settings = Settings.new
::VIM::set_option 'timeout' # ensure mappings timeout
::VIM::set_option 'timeoutlen=0' # respond immediately to mappings
::VIM::set_option 'nohlsearch' # don't highlight search strings
::VIM::set_option 'noinsertmode' # don't make Insert mode the default
::VIM::set_option 'noshowcmd' # don't show command info on last line
::VIM::set_option 'report=9999' # don't show "X lines changed" reports
::VIM::set_option 'sidescroll=0' # don't sidescroll in jumps
::VIM::set_option 'sidescrolloff=0' # don't sidescroll automatically
::VIM::set_option 'noequalalways' # don't auto-balance window sizes
# show match window
split_location = options[:match_window_at_top] ? 'topleft' : 'botright'
if @@buffer # still have buffer from last time
::VIM::command "silent! #{split_location} #{@@buffer.number}sbuffer"
raise "Can't re-open GoToFile buffer" unless $curbuf.number == @@buffer.number
$curwin.height = 1
else # creating match window for first time and set it up
split_command = "silent! #{split_location} 1split GoToFile"
[
split_command,
'setlocal bufhidden=unload', # unload buf when no longer displayed
'setlocal buftype=nofile', # buffer is not related to any file
'setlocal nomodifiable', # prevent manual edits
'setlocal noswapfile', # don't create a swapfile
'setlocal nowrap', # don't soft-wrap
'setlocal nonumber', # don't show line numbers
'setlocal nolist', # don't use List mode (visible tabs etc)
'setlocal foldcolumn=0', # don't show a fold column at side
'setlocal foldlevel=99', # don't fold anything
'setlocal nocursorline', # don't highlight line cursor is on
'setlocal nospell', # spell-checking off
'setlocal nobuflisted', # don't show up in the buffer list
'setlocal textwidth=0' # don't hard-wrap (break long lines)
].each { |command| ::VIM::command command }
# sanity check: make sure the buffer really was created
raise "Can't find GoToFile buffer" unless $curbuf.name.match /GoToFile/
@@buffer = $curbuf
end
# syntax coloring
if VIM::has_syntax?
::VIM::command "syntax match CommandTSelection \"^#{@@selection_marker}.\\+$\""
::VIM::command 'syntax match CommandTNoEntries "^-- NO MATCHES --$"'
::VIM::command 'syntax match CommandTNoEntries "^-- NO SUCH FILE OR DIRECTORY --$"'
::VIM::command 'highlight link CommandTSelection Visual'
::VIM::command 'highlight link CommandTNoEntries Error'
::VIM::evaluate 'clearmatches()'
# hide cursor
@cursor_highlight = get_cursor_highlight
hide_cursor
end
@has_focus = false
@selection = nil
@abbrev = ''
@window = $curwin
end
def close
# 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
::VIM::command "bwipeout! GoToFile"
@@buffer = nil
else
::VIM::command "bunload! #{@@buffer.number}"
end
restore_window_dimensions
@settings.restore
@prompt.dispose
show_cursor
end
def add! char
@abbrev += char
end
def backspace!
@abbrev.chop!
end
def select_next
if @selection < @matches.length - 1
@selection += 1
print_match(@selection - 1) # redraw old selection (removes marker)
print_match(@selection) # redraw new selection (adds marker)
else
# (possibly) loop or scroll
end
end
def select_prev
if @selection > 0
@selection -= 1
print_match(@selection + 1) # redraw old selection (removes marker)
print_match(@selection) # redraw new selection (adds marker)
else
# (possibly) loop or scroll
end
end
def matches= matches
if matches != @matches
@matches = matches
@selection = 0
print_matches
end
end
def focus
unless @has_focus
@has_focus = true
if VIM::has_syntax?
::VIM::command 'highlight link CommandTSelection Search'
end
end
end
def unfocus
if @has_focus
@has_focus = false
if VIM::has_syntax?
::VIM::command 'highlight link CommandTSelection Visual'
end
end
end
def find char
# is this a new search or the continuation of a previous one?
now = Time.now
if @last_key_time.nil? or @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.each_with_index do |match, idx|
if match[0, @find_string.length].casecmp(@find_string) == 0
old_selection = @selection
@selection = idx
print_match(old_selection) # redraw old selection (removes marker)
print_match(@selection) # redraw new selection (adds marker)
break
end
end
end
# Returns the currently selected item as a String.
def selection
@matches[@selection]
end
def print_no_such_file_or_directory
print_error 'NO SUCH FILE OR DIRECTORY'
end
private
def print_error msg
return unless VIM::Window.select(@window)
unlock
clear
@window.height = 1
@@buffer[1] = "-- #{msg} --"
lock
end
def restore_window_dimensions
# sort from tallest to shortest
@windows.sort! { |a, b| b.height <=> a.height }
# starting with the tallest ensures that there are no constraints
# preventing windows on the side of vertical splits from regaining
# their original full size
@windows.each do |w|
# beware: window may be nil
window = ::VIM::Window[w.index]
window.height = w.height if window
end
end
def match_text_for_idx idx
match = truncated_match @matches[idx]
if idx == @selection
prefix = @@selection_marker
suffix = padding_for_selected_match match
else
prefix = @@unselected_marker
suffix = ''
end
prefix + match + suffix
end
# Print just the specified match.
def print_match idx
return unless VIM::Window.select(@window)
unlock
@@buffer[idx + 1] = match_text_for_idx idx
lock
end
# Print all matches.
def print_matches
match_count = @matches.length
if match_count == 0
print_error 'NO MATCHES'
else
return unless VIM::Window.select(@window)
unlock
clear
actual_lines = 1
@window_width = @window.width # update cached value
max_lines = VIM::Screen.lines - 5
max_lines = 1 if max_lines < 0
actual_lines = match_count > max_lines ? max_lines : match_count
@window.height = actual_lines
(1..actual_lines).each do |line|
idx = line - 1
if @@buffer.count >= line
@@buffer[line] = match_text_for_idx idx
else
@@buffer.append line - 1, match_text_for_idx(idx)
end
end
lock
end
end
# Prepare padding for match text (trailing spaces) so that selection
# highlighting extends all the way to the right edge of the window.
def padding_for_selected_match str
len = str.length
if len >= @window_width - @@marker_length
''
else
' ' * (@window_width - @@marker_length - len)
end
end
# Convert "really/long/path" into "really...path" based on available
# window width.
def truncated_match str
len = str.length
available_width = @window_width - @@marker_length
return str if len <= available_width
left = (available_width / 2) - 1
right = (available_width / 2) - 2 + (available_width % 2)
str[0, left] + '...' + str[-right, right]
end
def clear
# range = % (whole buffer)
# action = d (delete)
# register = _ (black hole register, don't record deleted text)
::VIM::command 'silent %d _'
end
def get_cursor_highlight
# as :highlight returns nothing and only prints,
# must redirect its output to a variable
::VIM::command 'silent redir => g:command_t_cursor_highlight'
# force 0 verbosity to ensure origin information isn't printed as well
::VIM::command 'silent! 0verbose highlight Cursor'
::VIM::command 'silent redir END'
# there are 3 possible formats to check for, each needing to be
# transformed in a certain way in order to reapply the highlight:
# Cursor xxx guifg=bg guibg=fg -> :hi! Cursor guifg=bg guibg=fg
# Cursor xxx links to SomethingElse -> :hi! link Cursor SomethingElse
# Cursor xxx cleared -> :hi! clear Cursor
highlight = ::VIM::evaluate 'g:command_t_cursor_highlight'
if highlight =~ /^Cursor\s+xxx\s+links to (\w+)/
"link Cursor #{$~[1]}"
elsif highlight =~ /^Cursor\s+xxx\s+cleared/
'clear Cursor'
elsif highlight =~ /Cursor\s+xxx\s+(.+)/
"Cursor #{$~[1]}"
else # likely cause E411 Cursor highlight group not found
nil
end
end
def hide_cursor
if @cursor_highlight
::VIM::command 'highlight Cursor NONE'
end
end
def show_cursor
if @cursor_highlight
::VIM::command "highlight #{@cursor_highlight}"
end
end
def lock
::VIM::command 'setlocal nomodifiable'
end
def unlock
::VIM::command 'setlocal modifiable'
end
end
end