# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1437483786 -7200
# Node ID 957a3bb312fa105b9476ae029742eeb4b5f9b490
# Parent  2e7b340bdba5e98de55fcdf0c236332c0545a67d
patch 7.4.791
Problem:    The buffer list can be very long.
Solution:   Add an argument to ":ls" to specify the type of buffer to list.
            (Marcin Szamotulski)

diff --git a/runtime/doc/windows.txt b/runtime/doc/windows.txt
--- a/runtime/doc/windows.txt
+++ b/runtime/doc/windows.txt
@@ -986,9 +986,10 @@ A buffer can also be unlisted.  This mea
 list of buffers. |unlisted-buffer|
 
 
-:files[!]					*:files*
-:buffers[!]					*:buffers* *:ls*
-:ls[!]		Show all buffers.  Example:
+:files[!] [flags]				*:files*
+:buffers[!] [flags]				*:buffers* *:ls*
+:ls[!] [flags]
+		Show all buffers.  Example:
 
 			1 #h   "/test/text"		line 1 ~
 			2u     "asdf"			line 0 ~
@@ -1014,6 +1015,21 @@ list of buffers. |unlisted-buffer|
 		    +	a modified buffer
 		    x   a buffer with read errors
 
+		[flags] can be a combination of the following characters,
+		which restrict the buffers to be listed:
+		     +   modified buffers
+		     -   buffers with 'modifiable' off
+		     =   readonly buffers
+		     a   active buffers
+		     u   unloaded buffers (overrides the "!")
+		     h   hidden buffers
+		     x   buffers with a read error
+		     %   current buffer
+		     #   alternate buffer
+		Combining flags means they are "and"ed together, e.g.:
+		     h+   hidden buffers which are modified
+		     a+   active buffers which are modified
+
 						*:bad* *:badd*
 :bad[d]	[+lnum] {fname}
 		Add file name {fname} to the buffer list, without loading it.
diff --git a/src/buffer.c b/src/buffer.c
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2761,7 +2761,20 @@ buflist_list(eap)
     for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
     {
 	/* skip unlisted buffers, unless ! was used */
-	if (!buf->b_p_bl && !eap->forceit)
+	if ((!buf->b_p_bl && !eap->forceit && !vim_strchr(eap->arg, 'u'))
+		|| (vim_strchr(eap->arg, 'u') && buf->b_p_bl)
+		|| (vim_strchr(eap->arg, '+')
+			&& ((buf->b_flags & BF_READERR) || !bufIsChanged(buf)))
+		|| (vim_strchr(eap->arg, 'a')
+			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows == 0))
+		|| (vim_strchr(eap->arg, 'h')
+			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows != 0))
+		|| (vim_strchr(eap->arg, '-') && buf->b_p_ma)
+		|| (vim_strchr(eap->arg, '=') && !buf->b_p_ro)
+		|| (vim_strchr(eap->arg, 'x') && !(buf->b_flags & BF_READERR))
+		|| (vim_strchr(eap->arg, '%') && buf != curbuf)
+		|| (vim_strchr(eap->arg, '#')
+		      && (buf == curbuf || curwin->w_alt_fnum != buf->b_fnum)))
 	    continue;
 	msg_putchar('\n');
 	if (buf_spname(buf) != NULL)
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -217,7 +217,7 @@ EX(CMD_browse,		"browse",	ex_wrongmodifi
 			NEEDARG|EXTRA|NOTRLCOM|CMDWIN,
 			ADDR_LINES),
 EX(CMD_buffers,		"buffers",	buflist_list,
-			BANG|TRLBAR|CMDWIN,
+			BANG|EXTRA|TRLBAR|CMDWIN,
 			ADDR_LINES),
 EX(CMD_bufdo,		"bufdo",	ex_listdo,
 			BANG|NEEDARG|EXTRA|NOTRLCOM|RANGE|NOTADR|DFLALL,
@@ -526,7 +526,7 @@ EX(CMD_file,		"file",		ex_file,
 			RANGE|NOTADR|ZEROR|BANG|FILE1|TRLBAR,
 			ADDR_LINES),
 EX(CMD_files,		"files",	buflist_list,
-			BANG|TRLBAR|CMDWIN,
+			BANG|EXTRA|TRLBAR|CMDWIN,
 			ADDR_LINES),
 EX(CMD_filetype,	"filetype",	ex_filetype,
 			EXTRA|TRLBAR|CMDWIN,
@@ -847,7 +847,7 @@ EX(CMD_lwindow,		"lwindow",	ex_cwindow,
 			RANGE|NOTADR|COUNT|TRLBAR,
 			ADDR_LINES),
 EX(CMD_ls,		"ls",		buflist_list,
-			BANG|TRLBAR|CMDWIN,
+			BANG|EXTRA|TRLBAR|CMDWIN,
 			ADDR_LINES),
 EX(CMD_move,		"move",		ex_copymove,
 			RANGE|WHOLEFOLD|EXTRA|TRLBAR|CMDWIN|MODIFY,
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    791,
+/**/
     790,
 /**/
     789,