To: vim-dev@vim.org
Subject: Patch 7.2.274
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.2.274
Problem:    Syntax folding doesn't work properly when adding a comment.
Solution:   Fix it and add a test. (Lech Lorens)
Files:	    src/fold.c, src/testdir/test45.in, src/testdir/test45.ok


*** ../vim-7.2.273/src/fold.c	2009-09-18 15:16:37.000000000 +0200
--- src/fold.c	2009-11-03 12:36:37.000000000 +0100
***************
*** 2256,2261 ****
--- 2256,2295 ----
  	}
      }
  
+     /*
+      * If folding is defined by the syntax, it is possible that a change in
+      * one line will cause all sub-folds of the current fold to change (e.g.,
+      * closing a C-style comment can cause folds in the subsequent lines to
+      * appear). To take that into account we should adjust the value of "bot"
+      * to point to the end of the current fold:
+      */
+     if (foldlevelSyntax == getlevel)
+     {
+ 	garray_T *gap = &wp->w_folds;
+ 	fold_T	 *fp = NULL;
+ 	int	  current_fdl = 0;
+ 	linenr_T  fold_start_lnum = 0;
+ 	linenr_T  lnum_rel = fline.lnum;
+ 
+ 	while (current_fdl < fline.lvl)
+ 	{
+ 	    if (!foldFind(gap, lnum_rel, &fp))
+ 		break;
+ 	    ++current_fdl;
+ 
+ 	    fold_start_lnum += fp->fd_top;
+ 	    gap = &fp->fd_nested;
+ 	    lnum_rel -= fp->fd_top;
+ 	}
+ 	if (fp != NULL && current_fdl == fline.lvl)
+ 	{
+ 	    linenr_T fold_end_lnum = fold_start_lnum + fp->fd_len;
+ 
+ 	    if (fold_end_lnum > bot)
+ 		bot = fold_end_lnum;
+ 	}
+     }
+ 
      start = fline.lnum;
      end = bot;
      /* Do at least one line. */
*** ../vim-7.2.273/src/testdir/test45.in	2007-09-25 17:58:43.000000000 +0200
--- src/testdir/test45.in	2009-11-03 12:22:38.000000000 +0100
***************
*** 28,36 ****
  k:call append("$", foldlevel("."))
  :" test syntax folding
  :set fdm=syntax fdl=0
! :syn region Hup start="dd" end="hh" fold
  Gzk:call append("$", "folding " . getline("."))
  k:call append("$", getline("."))
  :" test expression folding
  :fun Flvl()
    let l = getline(v:lnum)
--- 28,41 ----
  k:call append("$", foldlevel("."))
  :" test syntax folding
  :set fdm=syntax fdl=0
! :syn region Hup start="dd" end="ii" fold contains=Fd1,Fd2,Fd3
! :syn region Fd1 start="ee" end="ff" fold contained
! :syn region Fd2 start="gg" end="hh" fold contained
! :syn region Fd3 start="commentstart" end="commentend" fold contained
  Gzk:call append("$", "folding " . getline("."))
  k:call append("$", getline("."))
+ jAcommentstart  Acommentend:set fdl=1
+ 3j:call append("$", getline("."))
  :" test expression folding
  :fun Flvl()
    let l = getline(v:lnum)
*** ../vim-7.2.273/src/testdir/test45.ok	2004-06-13 17:47:37.000000000 +0200
--- src/testdir/test45.ok	2009-11-03 12:22:50.000000000 +0100
***************
*** 8,15 ****
  0
  indent 2
  1
! folding 8 hh
      3 cc
  expr 2
  1
  2
--- 8,16 ----
  0
  indent 2
  1
! folding 9 ii
      3 cc
+ 7 gg
  expr 2
  1
  2
*** ../vim-7.2.273/src/version.c	2009-11-03 14:26:29.000000000 +0100
--- src/version.c	2009-11-03 14:44:21.000000000 +0100
***************
*** 678,679 ****
--- 678,681 ----
  {   /* Add new patch number below this line */
+ /**/
+     274,
  /**/

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