To: vim_dev@googlegroups.com
Subject: Patch 8.1.0244
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 8.1.0244
Problem:    No redraw when using a STOP signal on Vim and then a CONT signal.
Solution:   Catch the CONT signal and force a redraw. (closes #3285)
Files:	    src/os_unix.c, src/term.c, src/proto/term.pro


*** ../vim-8.1.0243/src/os_unix.c	2018-06-19 19:59:15.244704285 +0200
--- src/os_unix.c	2018-08-07 17:38:27.387722889 +0200
***************
*** 1227,1233 ****
      SIGRETURN;
  }
  
! #if defined(_REENTRANT) && defined(SIGCONT)
  /*
   * On Solaris with multi-threading, suspending might not work immediately.
   * Catch the SIGCONT signal, which will be used as an indication whether the
--- 1227,1249 ----
      SIGRETURN;
  }
  
!     static void
! after_sigcont(void)
! {
! # ifdef FEAT_TITLE
!     // Set oldtitle to NULL, so the current title is obtained again.
!     VIM_CLEAR(oldtitle);
! # endif
!     settmode(TMODE_RAW);
!     need_check_timestamps = TRUE;
!     did_check_timestamps = FALSE;
! }
! 
! #if defined(SIGCONT)
! static RETSIGTYPE sigcont_handler SIGPROTOARG;
! static int in_mch_suspend = FALSE;
! 
! # if defined(_REENTRANT) && defined(SIGCONT)
  /*
   * On Solaris with multi-threading, suspending might not work immediately.
   * Catch the SIGCONT signal, which will be used as an indication whether the
***************
*** 1239,1245 ****
   * volatile because it is used in signal handler sigcont_handler().
   */
  static volatile int sigcont_received;
! static RETSIGTYPE sigcont_handler SIGPROTOARG;
  
  /*
   * signal handler for SIGCONT
--- 1255,1261 ----
   * volatile because it is used in signal handler sigcont_handler().
   */
  static volatile int sigcont_received;
! # endif
  
  /*
   * signal handler for SIGCONT
***************
*** 1247,1253 ****
      static RETSIGTYPE
  sigcont_handler SIGDEFARG(sigarg)
  {
!     sigcont_received = TRUE;
      SIGRETURN;
  }
  #endif
--- 1263,1300 ----
      static RETSIGTYPE
  sigcont_handler SIGDEFARG(sigarg)
  {
!     if (in_mch_suspend)
!     {
! # if defined(_REENTRANT) && defined(SIGCONT)
! 	sigcont_received = TRUE;
! # endif
!     }
!     else
!     {
! 	// We didn't suspend ourselves, assume we were stopped by a SIGSTOP
! 	// signal (which can't be intercepted) and get a SIGCONT.  Need to get
! 	// back to a sane mode and redraw.
! 	after_sigcont();
! 
! 	update_screen(CLEAR);
! 	if (State & CMDLINE)
! 	    redrawcmdline();
! 	else if (State == HITRETURN || State == SETWSIZE || State == ASKMORE
! 		|| State == EXTERNCMD || State == CONFIRM || exmode_active)
! 	    repeat_message();
! 	else if (redrawing())
! 	    setcursor();
! #if defined(FEAT_INS_EXPAND)
! 	if (pum_visible())
! 	{
! 	    redraw_later(NOT_VALID);
! 	    ins_compl_show_pum();
! 	}
! #endif
! 	cursor_on_force();
! 	out_flush();
!     }
! 
      SIGRETURN;
  }
  #endif
***************
*** 1330,1335 ****
--- 1377,1384 ----
  {
      /* BeOS does have SIGTSTP, but it doesn't work. */
  #if defined(SIGTSTP) && !defined(__BEOS__)
+     in_mch_suspend = TRUE;
+ 
      out_flush();	    /* needed to make cursor visible on some systems */
      settmode(TMODE_COOK);
      out_flush();	    /* needed to disable mouse on some systems */
***************
*** 1361,1376 ****
  	    mch_delay(wait_time, FALSE);
      }
  # endif
  
! # ifdef FEAT_TITLE
!     /*
!      * Set oldtitle to NULL, so the current title is obtained again.
!      */
!     VIM_CLEAR(oldtitle);
! # endif
!     settmode(TMODE_RAW);
!     need_check_timestamps = TRUE;
!     did_check_timestamps = FALSE;
  #else
      suspend_shell();
  #endif
--- 1410,1418 ----
  	    mch_delay(wait_time, FALSE);
      }
  # endif
+     in_mch_suspend = FALSE;
  
!     after_sigcont();
  #else
      suspend_shell();
  #endif
***************
*** 1410,1416 ****
  #ifdef SIGTSTP
      signal(SIGTSTP, restricted ? SIG_IGN : SIG_DFL);
  #endif
! #if defined(_REENTRANT) && defined(SIGCONT)
      signal(SIGCONT, sigcont_handler);
  #endif
  
--- 1452,1458 ----
  #ifdef SIGTSTP
      signal(SIGTSTP, restricted ? SIG_IGN : SIG_DFL);
  #endif
! #if defined(SIGCONT)
      signal(SIGCONT, sigcont_handler);
  #endif
  
*** ../vim-8.1.0243/src/term.c	2018-07-10 17:33:41.825155261 +0200
--- src/term.c	2018-08-07 17:22:23.328496700 +0200
***************
*** 3789,3804 ****
  static int cursor_is_off = FALSE;
  
  /*
   * Enable the cursor.
   */
      void
  cursor_on(void)
  {
      if (cursor_is_off)
!     {
! 	out_str(T_VE);
! 	cursor_is_off = FALSE;
!     }
  }
  
  /*
--- 3789,3811 ----
  static int cursor_is_off = FALSE;
  
  /*
+  * Enable the cursor without checking if it's already enabled.
+  */
+     void
+ cursor_on_force(void)
+ {
+     out_str(T_VE);
+     cursor_is_off = FALSE;
+ }
+ 
+ /*
   * Enable the cursor.
   */
      void
  cursor_on(void)
  {
      if (cursor_is_off)
! 	cursor_on_force();
  }
  
  /*
*** ../vim-8.1.0243/src/proto/term.pro	2018-05-17 13:52:53.000000000 +0200
--- src/proto/term.pro	2018-08-07 17:28:27.358277122 +0200
***************
*** 50,55 ****
--- 50,56 ----
  int mouse_has(int c);
  int mouse_model_popup(void);
  void scroll_start(void);
+ void cursor_on_force(void);
  void cursor_on(void);
  void cursor_off(void);
  void term_cursor_mode(int forced);
*** ../vim-8.1.0243/src/version.c	2018-08-07 16:33:15.255728441 +0200
--- src/version.c	2018-08-07 17:35:43.784518901 +0200
***************
*** 796,797 ****
--- 796,799 ----
  {   /* Add new patch number below this line */
+ /**/
+     244,
  /**/

-- 
When I look deep into your eyes, I see JPEG artifacts.
I can tell by the pixels that we're wrong for each other.  (xkcd)

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
 \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///