" Copyright 2015-present Greg Hurrell. All rights reserved.
" Licensed under the terms of the BSD 2-clause license.

" Provide users with means to prevent loading, as recommended in `:h
" write-plugin`.
if exists('g:TerminusLoaded') || &compatible || v:version < 700
  finish
endif
let g:TerminusLoaded=1

" Temporarily set 'cpoptions' to Vim default as per `:h use-cpo-save`.
let s:cpoptions=&cpoptions
set cpoptions&vim

set autoread " if not changed in Vim, automatically pick up changes after "git checkout" etc
if &ttimeoutlen == -1 && &timeoutlen > 50 || &ttimeoutlen > 50
  set ttimeoutlen=50 " speed up O etc in the Terminal
endif

let s:iterm=
      \ exists('$ITERM_PROFILE') ||
      \ exists('$ITERM_SESSION_ID') ||
      \ exists('$KONSOLE_DBUS_SESSION') ||
      \ exists('$KONSOLE_PROFILE_NAME') ||
      \ exists('g:TerminusAssumeITerm') ||
      \ filereadable(expand('~/.vim/.assume-iterm'))
let s:screenish=&term =~# 'screen\|tmux'
let s:tmux=exists('$TMUX')
let s:xterm=&term =~# 'xterm'

" Change shape of cursor in insert mode in iTerm 2.
let s:shape=get(g:, 'TerminusCursorShape', 1)
if s:shape
  let s:insert_shape=+get(g:, 'TerminusInsertCursorShape', 1)
  let s:replace_shape=+get(g:, 'TerminusReplaceCursorShape', 2)
  let s:normal_shape=+get(g:, 'TerminusNormalCursorShape', 0)
  if s:iterm
    let s:start_insert="\<Esc>]50;CursorShape=" . s:insert_shape . "\x7"
    let s:start_replace="\<Esc>]50;CursorShape=" . s:replace_shape . "\x7"
    let s:end_insert="\<Esc>]50;CursorShape=" . s:normal_shape . "\x7"
  else
    let s:cursor_shape_to_vte_shape={1: 6, 2: 4, 0: 2}
    let s:insert_shape=s:cursor_shape_to_vte_shape[s:insert_shape]
    let s:replace_shape=s:cursor_shape_to_vte_shape[s:replace_shape]
    let s:normal_shape=s:cursor_shape_to_vte_shape[s:normal_shape]
    let s:start_insert="\<Esc>[" . s:insert_shape . ' q'
    let s:start_replace="\<Esc>[" . s:replace_shape . ' q'
    let s:end_insert="\<Esc>[" . s:normal_shape . ' q'
  endif

  if s:tmux
    let s:start_insert=terminus#private#wrap(s:start_insert)
    let s:start_replace=terminus#private#wrap(s:start_replace)
    let s:end_insert=terminus#private#wrap(s:end_insert)
  endif

  let &t_SI=s:start_insert
  if v:version > 704 || v:version == 704 && has('patch687')
    let &t_SR=s:start_replace
  end
  let &t_EI=s:end_insert
endif

let s:mouse=get(g:, 'TerminusMouse', 1)
if s:mouse
  if has('mouse')
    set mouse=a
    if s:screenish || s:xterm
      if !has('nvim')
        if has('mouse_sgr')
          set ttymouse=sgr
        else
          set ttymouse=xterm2
        endif
      endif
    endif
  endif
endif

let s:focus=get(g:, 'TerminusFocusReporting', 1)
if s:focus
  if has('autocmd')
    augroup Terminus
      autocmd!
      autocmd FocusGained * checktime
    augroup END
  endif

  " Enable focus reporting on entering Vim.
  let &t_ti.="\e[?1004h"
  " Disable focus reporting on leaving Vim.
  let &t_te="\e[?1004l" . &t_te

  execute "set <f20>=\<Esc>[O"
  execute "set <f21>=\<Esc>[I"
  cnoremap <silent> <f20> <c-\>eterminus#private#focus_lost()<cr>
  cnoremap <silent> <f21> <c-\>eterminus#private#focus_gained()<cr>

  if v:version > 703 || v:version == 703 && has('patch438')
    " <nomodeline> was added in 7.3.438 (see `:h version7.txt`).
    inoremap <silent> <f20> <c-o>:silent doautocmd <nomodeline> FocusLost %<cr>
    inoremap <silent> <f21> <c-o>:silent doautocmd <nomodeline> FocusGained %<cr>
    nnoremap <silent> <f20> :silent doautocmd <nomodeline> FocusLost %<cr>
    nnoremap <silent> <f21> :silent doautocmd <nomodeline> FocusGained %<cr>
    onoremap <silent> <f20> <Esc>:silent doautocmd <nomodeline> FocusLost %<cr>
    onoremap <silent> <f21> <Esc>:silent doautocmd <nomodeline> FocusGained %<cr>
    vnoremap <silent> <f20> <Esc>:silent doautocmd <nomodeline> FocusLost %<cr>gv
    vnoremap <silent> <f21> <Esc>:silent doautocmd <nomodeline> FocusGained %<cr>gv
  else
    inoremap <silent> <f20> <c-o>:silent doautocmd FocusLost %<cr>
    inoremap <silent> <f21> <c-o>:silent doautocmd FocusGained %<cr>
    nnoremap <silent> <f20> :silent doautocmd FocusLost %<cr>
    nnoremap <silent> <f21> :silent doautocmd FocusGained %<cr>
    onoremap <silent> <f20> <Esc>:silent doautocmd FocusLost %<cr>
    onoremap <silent> <f21> <Esc>:silent doautocmd FocusGained %<cr>
    vnoremap <silent> <f20> <Esc>:silent doautocmd FocusLost %<cr>gv
    vnoremap <silent> <f21> <Esc>:silent doautocmd FocusGained %<cr>gv
  endif
endif

let s:paste=get(g:, 'TerminusBracketedPaste', 1)
if s:paste
  " Make use of Xterm "bracketed paste mode". See:
  "  - http://www.xfree86.org/current/ctlseqs.html#Bracketed%20Paste%20Mode
  "  - http://stackoverflow.com/questions/5585129
  if s:screenish || s:xterm
    " Enable bracketed paste mode on entering Vim.
    let &t_ti.="\e[?2004h"

    " Disable bracketed paste mode on leaving Vim.
    let &t_te="\e[?2004l" . &t_te

    set pastetoggle=<Esc>[201~
    inoremap <expr> <Esc>[200~ terminus#private#paste('')
    nnoremap <expr> <Esc>[200~ terminus#private#paste('i')
    vnoremap <expr> <Esc>[200~ terminus#private#paste('c')
    cnoremap <Esc>[200~ <nop>
    cnoremap <Esc>[201~ <nop>
  endif
endif

" Restore 'cpoptions' to its former value.
let &cpoptions=s:cpoptions
unlet s:cpoptions