Add foreground dispatch support for screen

Author: vedknom

autoload/dispatch.vim

@@ -98,18 +98,19 @@ function! dispatch#callback(request) abort
   return ''
 endfunction
 
-function! dispatch#prepare_start(request, ...) abort
+function! s:prepare_start(request, aftercmd, appendpipe) abort
   let exec = 'echo $$ > ' . a:request.file . '.pid; '
   if executable('perl')
     let exec .= 'perl -e "select(undef,undef,undef,0.1)" 2>/dev/null; '
   else
     let exec .= 'sleep 1; '
   endif
-  let exec .= a:0 ? a:1 : a:request.expanded
+  let exec .= a:request.expanded . (a:appendpipe ? dispatch#shellpipe(a:request.file) : '')
   let callback = dispatch#callback(a:request)
   let after = 'rm -f ' . a:request.file . '.pid; ' .
         \ 'touch ' . a:request.file . '.complete' .
-        \ (empty(callback) ? '' : '; ' . callback)
+        \ (empty(callback) ? '' : '; ' . callback) .
+        \ (empty(a:aftercmd) ? '' : '; ' . a:aftercmd)
   if &shellpipe =~# '2>&1'
     return 'trap ' . shellescape(after) . ' EXIT INT TERM; ' . exec
   else
@@ -118,9 +119,15 @@ function! dispatch#prepare_start(request, ...) abort
   endif
 endfunction
 
+function! dispatch#prepare_start(request, ...) abort
+  let aftercmd = a:0 >= 1 ? a:1 : ''
+  return s:prepare_start(request, aftercmd, 0)
+endfunction
+
 function! dispatch#prepare_make(request, ...) abort
-  let exec = a:0 ? a:1 : (a:request.expanded . dispatch#shellpipe(a:request.file))
-  return dispatch#prepare_start(a:request, exec, 1)
+  let aftercmd = a:0 >= 1 ? a:1 : ''
+  let appendpipe = a:0 >= 2 ? a:2 : 1
+  return s:prepare_start(a:request, aftercmd, appendpipe)
 endfunction
 
 function! dispatch#set_title(request) abort

autoload/dispatch/screen.vim

@@ -5,29 +5,43 @@ if exists('g:autoloaded_dispatch_screen')
 endif
 let g:autoloaded_dispatch_screen = 1
 
+let s:waiting = {}
+
 function! dispatch#screen#handle(request) abort
   if empty($STY) || !executable('screen')
     return 0
   endif
+  let aftercmd = 'screen -X only; screen -X at $WINDOW kill'
   if a:request.action ==# 'make'
-    if !get(a:request, 'background', 0) && empty(v:servername)
+    if !get(a:request, 'background', 0) && empty(v:servername) && !empty(s:waiting)
       return 0
     endif
-    return dispatch#screen#spawn(dispatch#prepare_make(a:request), a:request)
+    let cmd = dispatch#prepare_make(a:request, aftercmd)
+    return dispatch#screen#spawn(cmd, a:request)
   elseif a:request.action ==# 'start'
-    return dispatch#screen#spawn(dispatch#prepare_start(a:request), a:request)
+    let cmd = dispatch#prepare_start(a:request, aftercmd)
+    return dispatch#screen#spawn(cmd, a:request)
   endif
 endfunction
 
 function! dispatch#screen#spawn(command, request) abort
-  let command = 'screen -ln -fn -t '.dispatch#shellescape(a:request.title)
+  let command = ''
+  if !get(a:request, 'background', 0)
+    silent execute "!screen -X eval 'split' 'focus down' 'resize 10'"
+  endif
+  let command .= 'screen -ln -fn -t '.dispatch#shellescape(a:request.title)
         \ . ' ' . &shell . ' ' . &shellcmdflag . ' '
         \ . shellescape('exec ' . dispatch#isolate(['STY', 'WINDOW'],
         \ dispatch#set_title(a:request), a:command))
   silent execute '!' . escape(command, '!#%')
+
   if a:request.background
     silent !screen -X other
+  else
+    silent !screen -X focus up
   endif
+
+  let s:waiting = a:request
   return 1
 endfunction
 
@@ -42,3 +56,19 @@ function! dispatch#screen#activate(pid) abort
     return !v:shell_error
   endif
 endfunction
+
+function! dispatch#screen#poll() abort
+  if empty(s:waiting)
+    return
+  endif
+  let request = s:waiting
+  if !dispatch#pid(request)
+    let s:waiting = {}
+    call dispatch#complete(request)
+  endif
+endfunction
+
+augroup dispatch_screen
+  autocmd!
+  autocmd VimResized * if !has('gui_running') | call dispatch#screen#poll() | endif
+augroup END

autoload/dispatch/tmux.vim

@@ -37,8 +37,7 @@ function! dispatch#tmux#make(request) abort
         \ && a:request.format !~# '%\\[er]'
   let session = get(g:, 'tmux_session', '')
   let script = dispatch#isolate(['TMUX', 'TMUX_PANE'],
-        \ call('dispatch#prepare_make',
-        \ [a:request] + (pipepane ? [a:request.expanded] : [])))
+        \ dispatch#prepare_make(a:request, '', !pipepane))
 
   let title = shellescape(get(a:request, 'title', get(a:request, 'compiler', 'make')))
   if get(a:request, 'background', 0)