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To: vim_dev@googlegroups.com
Subject: Patch 7.4.603
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.4.603
Problem:    'foldcolumn' may be set such that it fills the whole window, not
	    leaving space for text.
Solution:   Reduce the foldcolumn width when there is not sufficient room.
	    (idea by Christian Brabandt)
Files:	    src/srcreen.c


*** ../vim-7.4.602/src/screen.c	2015-01-20 19:01:32.380444290 +0100
--- src/screen.c	2015-01-27 16:25:47.264690419 +0100
***************
*** 109,114 ****
--- 109,115 ----
  
  #ifdef FEAT_FOLDING
  static foldinfo_T win_foldinfo;	/* info for 'foldcolumn' */
+ static int compute_foldcolumn __ARGS((win_T *wp, int col));
  #endif
  
  /*
***************
*** 1202,1208 ****
  			lnumb = wp->w_lines[i].wl_lnum;
  			/* When there is a fold column it might need updating
  			 * in the next line ("J" just above an open fold). */
! 			if (wp->w_p_fdc > 0)
  			    ++lnumb;
  		    }
  		}
--- 1203,1209 ----
  			lnumb = wp->w_lines[i].wl_lnum;
  			/* When there is a fold column it might need updating
  			 * in the next line ("J" just above an open fold). */
! 			if (compute_foldcolumn(wp, 0) > 0)
  			    ++lnumb;
  		    }
  		}
***************
*** 2238,2250 ****
  #else
  # define FDC_OFF 0
  #endif
  
  #ifdef FEAT_RIGHTLEFT
      if (wp->w_p_rl)
      {
  	/* No check for cmdline window: should never be right-left. */
  # ifdef FEAT_FOLDING
! 	n = wp->w_p_fdc;
  
  	if (n > 0)
  	{
--- 2239,2254 ----
  #else
  # define FDC_OFF 0
  #endif
+ #ifdef FEAT_FOLDING
+     int		fdc = compute_foldcolumn(wp, 0);
+ #endif
  
  #ifdef FEAT_RIGHTLEFT
      if (wp->w_p_rl)
      {
  	/* No check for cmdline window: should never be right-left. */
  # ifdef FEAT_FOLDING
! 	n = fdc;
  
  	if (n > 0)
  	{
***************
*** 2293,2301 ****
  	}
  #endif
  #ifdef FEAT_FOLDING
! 	if (wp->w_p_fdc > 0)
  	{
! 	    int	    nn = n + wp->w_p_fdc;
  
  	    /* draw the fold column at the left */
  	    if (nn > W_WIDTH(wp))
--- 2297,2305 ----
  	}
  #endif
  #ifdef FEAT_FOLDING
! 	if (fdc > 0)
  	{
! 	    int	    nn = n + fdc;
  
  	    /* draw the fold column at the left */
  	    if (nn > W_WIDTH(wp))
***************
*** 2346,2351 ****
--- 2350,2373 ----
  
  #ifdef FEAT_FOLDING
  /*
+  * Compute the width of the foldcolumn.  Based on 'foldcolumn' and how much
+  * space is available for window "wp", minus "col".
+  */
+     static int
+ compute_foldcolumn(wp, col)
+     win_T *wp;
+     int   col;
+ {
+     int fdc = wp->w_p_fdc;
+     int wmw = wp == curwin && p_wmw == 0 ? 1 : p_wmw;
+     int wwidth = W_WIDTH(wp);
+ 
+     if (fdc > wwidth - (col + wmw))
+ 	fdc = wwidth - (col + wmw);
+     return fdc;
+ }
+ 
+ /*
   * Display one folded line.
   */
      static void
***************
*** 2396,2405 ****
  
      /*
       * 2. Add the 'foldcolumn'
       */
!     fdc = wp->w_p_fdc;
!     if (fdc > W_WIDTH(wp) - col)
! 	fdc = W_WIDTH(wp) - col;
      if (fdc > 0)
      {
  	fill_foldcolumn(buf, wp, TRUE, lnum);
--- 2418,2426 ----
  
      /*
       * 2. Add the 'foldcolumn'
+      *    Reduce the width when there is not enough space.
       */
!     fdc = compute_foldcolumn(wp, col);
      if (fdc > 0)
      {
  	fill_foldcolumn(buf, wp, TRUE, lnum);
***************
*** 2787,2809 ****
      int		level;
      int		first_level;
      int		empty;
  
      /* Init to all spaces. */
!     copy_spaces(p, (size_t)wp->w_p_fdc);
  
      level = win_foldinfo.fi_level;
      if (level > 0)
      {
  	/* If there is only one column put more info in it. */
! 	empty = (wp->w_p_fdc == 1) ? 0 : 1;
  
  	/* If the column is too narrow, we start at the lowest level that
  	 * fits and use numbers to indicated the depth. */
! 	first_level = level - wp->w_p_fdc - closed + 1 + empty;
  	if (first_level < 1)
  	    first_level = 1;
  
! 	for (i = 0; i + empty < wp->w_p_fdc; ++i)
  	{
  	    if (win_foldinfo.fi_lnum == lnum
  			      && first_level + i >= win_foldinfo.fi_low_level)
--- 2808,2831 ----
      int		level;
      int		first_level;
      int		empty;
+     int		fdc = compute_foldcolumn(wp, 0);
  
      /* Init to all spaces. */
!     copy_spaces(p, (size_t)fdc);
  
      level = win_foldinfo.fi_level;
      if (level > 0)
      {
  	/* If there is only one column put more info in it. */
! 	empty = (fdc == 1) ? 0 : 1;
  
  	/* If the column is too narrow, we start at the lowest level that
  	 * fits and use numbers to indicated the depth. */
! 	first_level = level - fdc - closed + 1 + empty;
  	if (first_level < 1)
  	    first_level = 1;
  
! 	for (i = 0; i + empty < fdc; ++i)
  	{
  	    if (win_foldinfo.fi_lnum == lnum
  			      && first_level + i >= win_foldinfo.fi_low_level)
***************
*** 2819,2825 ****
  	}
      }
      if (closed)
! 	p[i >= wp->w_p_fdc ? i - 1 : i] = '+';
  }
  #endif /* FEAT_FOLDING */
  
--- 2841,2847 ----
  	}
      }
      if (closed)
! 	p[i >= fdc ? i - 1 : i] = '+';
  }
  #endif /* FEAT_FOLDING */
  
***************
*** 3556,3567 ****
  #ifdef FEAT_FOLDING
  	    if (draw_state == WL_FOLD - 1 && n_extra == 0)
  	    {
  		draw_state = WL_FOLD;
! 		if (wp->w_p_fdc > 0)
  		{
  		    /* Draw the 'foldcolumn'. */
  		    fill_foldcolumn(extra, wp, FALSE, lnum);
! 		    n_extra = wp->w_p_fdc;
  		    p_extra = extra;
  		    p_extra[n_extra] = NUL;
  		    c_extra = NUL;
--- 3578,3591 ----
  #ifdef FEAT_FOLDING
  	    if (draw_state == WL_FOLD - 1 && n_extra == 0)
  	    {
+ 		int fdc = compute_foldcolumn(wp, 0);
+ 
  		draw_state = WL_FOLD;
! 		if (fdc > 0)
  		{
  		    /* Draw the 'foldcolumn'. */
  		    fill_foldcolumn(extra, wp, FALSE, lnum);
! 		    n_extra = fdc;
  		    p_extra = extra;
  		    p_extra[n_extra] = NUL;
  		    c_extra = NUL;
*** ../vim-7.4.602/src/version.c	2015-01-27 15:58:37.202395482 +0100
--- src/version.c	2015-01-27 16:14:45.703878550 +0100
***************
*** 743,744 ****
--- 743,746 ----
  {   /* Add new patch number below this line */
+ /**/
+     603,
  /**/

-- 
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 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
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