Use GQueue instead of GList to store listbox entries.
g_list_append() function is slow because it uses g_list_last()
internally to traverse from the beginning to the end of a list, so
forming a list of results has O(n*n) complexity instead of O(n).
GQueue contains pointers to head and tail of list and list length.
So in this case we don't need seach end of list every time when we
want append listbox entry to the listbox.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
If you navigate in your shell to a directory containing symlinks and
then start mc, mc will show the canonical path instead. It would be nice
to make it show the directory with the symlinks.
Example: in your shell execute these:
user:~$ mkdir -p /tmp/a/b /tmp/x ; ln -s /tmp/a/b /tmp/x/y
user:~$ cd /tmp/x/y
user:/tmp/x/y$ mc
In mc you'll find yourself in /tmp/a/b, though it'd be nicer to see
/tmp/x/y at the top, and correspondingly navigating to the parent would
take you to /tmp/x.
If you start bash or zsh from /tmp/x/y, the new instance will start
displaying the working directory as such. They do this via the PWD env
variable. On one hand, they set and maintain PWD to point to the current
directory, using the path as specified by the user (possibly containing
symbolic links). On the other hand, they check its value at startup. If
$PWD points to the same physical directory as the actual working
directory then they use this value. If $PWD points somewhere else then
it's simply ignored (so it's a hint only as to which symlinks to use to
get to the working directory, but never alters the actual cwd).
Now mc also does the same at startup (with respect of "Cd follows
links" option). Relative directories specified in the command line are
applied after possibly replacing the canonical cwd with $PWD. This way
for example
user:/tmp/x/y$ mc . ..
opens two panels in /tmp/x/y and /tmp/x instead of /tmp/a/b and /tmp/a
(whereas /tmp/x is actually a different directory than /tmp/a).
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Instead of checking for sys/mkdev.h headerfile, there is the
AC_HEADER_MAJOR helper for how to get major(), minor(), makedev().
Sinc with GLib efb1701bf3baf6f5b05fd1a7a5a4ff990a7dc460.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
In the command line, the subdirectory completion in current directory
isn't performed if stub isn't starting with './'.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
If checkbox is the first focusable widget in a dialog, it taken the MSG_DRAW
message after MSG_FOCUS one and therefore wasn't highlighted.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
How to reproduce:
1. Set num_history_items_recorded=0 in my $HOME/.config/mc/ini
2. Run mc.
3. Press F5 to copy and then enter.
Result: nothing happens.
Solution: refactoring of initial text usage in input line.
Use def_text to fill WInput:buffer when WInput is created.
Then overwrite WInput::buffer content from history if history usage
is enabled.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
...for case where there is no MC_SEARCH_CB_INVALID or MC_SEARCH_CB_SKIP
return codes (for search from file manager), so we can copy line
at regex buffer all at once.
Thanks Sergey Naumov <sknaumov@gmail.com> for the original patch.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
MC already has its own half-ready trick: when pasting with Shift-Insert,
using the X11 extension, the newline ("Enter" as mc calls it) with the
Shift modifier pressed gets converted to a "Return", and in the editor
the Return character inserts a non-indenting newline. This makes pasting
better in terminals not supporting bracketed paste, however, it has some
problems that this commit addresses:
* Shift+newline gets this special treatment, but Ctrl+newline gets
dropped. Hence e.g. when pasting in Gnome-terminal with Ctrl+Shift+V
all the newlines will be missing. This commit adds the same
non-indenting newline behavior to Ctrl+Newline and Ctrl+Shift+Newline.
* The code forgets about Tab that also needs special treatment:
- Most terminals send \e[Z on Shift+Tab, this is not handled by MC
at all, moreover it causes a hang for about a second. This commit
teaches this sequence to MC. This is especially useful when no X11
is available, because there Ctrl+Tab is identical to Tab, so the
backwards tab feature is not available. With this commit Shift+Tab
becomes a backwards tab too on all terminals that emit \e[Z.
- When pasting to the editor, Shift+Tab, Ctrl+Tab and Ctrl+Shift+Tab
should all insert a tab for the same reason mentioned at the newline.
- It would look inconsistent in the keymap files to have logical code
such as "backtab" instead of "shift-tab" and friends, hence get rid
of KEY_BTAB and use KEY_M_SHIFT | '\t' instead.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
...if file encoding and locale are different.
Example: locale is KOI8-R, file encoding is UTF-8. Note: those encodings
are not same.
File content is following (in Russian):
йцукен
Йцукен
The difference is in first line char only: Й (lowercase letter) and й
(uppercase letter). The search of Ê gives the result Й independently of
case sensitivity. й isn't found.
If switch "All charsets" on, nothing is found.
The main idea of fix is modification of search API to allow set of search
pattern charset and use if within search engine.
Old API:
mc_search_new (pattern, pattern_len);
New API:
mc_search_new (pattern, pattern_len, pattern_charset);
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
HAVE_NCURSESW_CURSES_H included the wrong header.
Partially revert 80c8d58003
for lib/tty/tty-ncurses.h.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
When there's no mc-tmpdir and a user tries to start two mc sessions
simultaneously, sometimes (in one out of ten attempts on my machine) one
mc session emits the following error message:
Cannot create temporary directory /tmp/mc-lars: File exists (17)
Temporary files will be created in /tmp
Press any key to continue...
Steps to reproduce:
# rm /tmp/mc-$(whoami) -rf
# uxterm -e mc & uxterm -e mc
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
mc may not detect the gpm mouse under X11 on many x terminals when running together with tmux or screen.
On some cases it can even hang.
It's a small patch to the gpm maintainer to improve its checking.
Seems there is a need also to a small change on mc.
Now everything is working perfectly.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Revert "(size_trunc_len): support automatic maximum unit for specified size."
This reverts commit ef94b84eaf.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
* get rid of extra memory duplication;
* support of recursive search of correct encoding;
* add tests.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
to drop already received part - there can be more of it
coming over e.g. a serial line.
To prevent interpreting it as a random garbage,
eat and discard all chars that follow.
Small, but non-zero timeout is needed to reconnect
escape sequence split up by a serial line.
Before this change, Ctrl-Alt-Shift-Right_Arrow generates "1;8C"
bogus "input" in MC on my machine; after the change,
nothing is generated.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
tail as a garbage input. To reproduce, run "sleep 3" and
hold down Down_Arrow key until sleep runs.
With debugging log enabled, the following can be seen:
entered get_key_code(no_delay:0)
c=tty_lowlevel_getch()=27
push_char(27) !0
c=xgetch_second()=91
push_char(91) !0
2 c=tty_lowlevel_getch()=66
push_char(66)
seq_buffer[0]:27 <---- the saved Down Arrow sequence "ESC [ B"
seq_buffer[1]:91
seq_buffer[2]:66
seq_buffer[3]:0
pending_keys!=NULL. m=-1
d=*pending_keys++=27
d=ALT(*pending_keys++)=ALT(91)=8283
^^^^^^^^^^^^^^^^^^^^^^^ we misinterpret "ESC [ B" as "ESC ["
return correct_key_code(8283)
entered get_key_code(no_delay:0)
pending_keys!=NULL. m=-1
d=*pending_keys++=66
^^^^^^^^^^^^ we think user pressed "B"
return correct_key_code(66)
With this patch, no bogus "input" is generated.
Longer unknown sequences need an additional fix, coming next.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
keyboard input: simplify code, no logic changes
This change slightly simplifies and rearranges the code
in get_key_code(), reduces indentation levels there,
adds a few comments. The logic remains the same.
This is a preparatory patch for subsequent changes.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
How to reproduce:
1. Switch the "Drop down menus" option off.
2. Press F9 to activate menubar. Menu is not dropped.
3. Click somewhere below menubar, on one of the files in the directory
listing.
Buggy behavior: the corresponding "Left" or "File" etc. dropdown is
opened, and the mouse button is released, menu item under the mouse
cursor is activated.
Correct behavior: clicking with the mouse somewhere other than the
active menubar doesn't open dropdown menu, instead removes the focus from
menubar and acts on the actual item under the mouse pointer (such
as a filename in the panel).
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
for example, the config file may contain strings:
[External editor or viewer parameters]
vim = %filename +%lineno
mcedit = %filename:%lineno
And these external editors will open a file at the previously saved position.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Test case:
1. Create a file with name that contains some special chars:
touch attachment.cgi?id=564208
2. Press F6.
3. Press a. Now only the 'a' letter is in input line.
4. Press Esc Tab Enter.
5a. Input line is filled by 'attachment.cgi?id=564208'...
5b. but 'attachment.cgi\?id=564208' is expected.
6. Add 'patch_' before file name:
'patch_attachment.cgi?id=564208'.
7. Press Enter.
8a. Result: 'patch_attachment.cgiattachment.cgi?id=564208id=564208'.
8b. Expected result: 'patch_attachment.cgi?id=564208'.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Steps to Reproduce:
1. Run mc in native console (not in X terminal emulator).
2. Press Ctrl+O to switch to subshell.
3. Try select anything with mouse.
Result: mouse does't select anything.
This bug was introduced in 68468a25ac
commit.
Solution: make mouse initialization after initializaton of subshell.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
A followup extension, "SGR 1006" was invented by xterm, to overcome some
of the shortcomings of the previous one. It is becoming as widespread as
the previous one, and is likely to soon overtake it in popularity.
Note that most of the patch is just the removal of the huge complexity
introduced by the previous one. The previous extension didn't have a
unique prefix which made the whole parsing logic extremely complicated.
The new extension does have a unique prefix, so parsing becomes a piece
of cake. The code becomes much cleaner and much easier to maintain.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
* (filename_completion_function): use GString to ret rid of hand-made
low-level memory allocation.
* (variable_completion_function): likewise.
* (hostname_completion_function): likewise.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
* (hline_set_text): new function.
* (file_progress_show_total): use hline_set_text to show processed
files counter.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
...to avoid conflict with global names.
On HP-UX, inttypes.h includes ctype.h through other dependencies, ctype.h
defines macros for various functions and these macros clash with entries
of "struct str_class".
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
(mc_search): immediately return FALSE if str is NULL.
(mc_search_run): immediately return FALSE if user_data is NULL.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Added feature for the mcdiff for the bidirectional merge.
With F15 mcdiffviewer merge left panel to right panel direction.
original patch by Gergely Szasz <szaszg@hu.inter.net>
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
added bind "MergeOther" into mc.keymap.default, mc.keymap.emacs.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
Steps to reproduce:
* run mc
* change encoding one of panels to any different from system encoding
* try to copy any file to panel with changed encoding
Expected result: files should be copied.
Actual result: error box here.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Some ini files (keymaps, skins) are loaded in read-only mode. For those
files, we don't need load and keep comments.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Set defines via CPPFLAGS variable not via CFLAGS one.
Use AM_CPPFLAGS and AM_CFLAGS variables instead of per-target ones.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
In Search dialog in mcedit M-n hotkey was used for normal search mode.
Therefore, M-n as HistoryPrev in the input line was in accessible.
Change hotkey for normal seach mode to M-r. Use this hotkey for normal diff
mode in mcdiffviewer to unify i18n resources.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Steps to reproduce:
* ./configure --disable-vfs
* make
Expected result: project should be builded successfully.
Actual result:
build stopped with errors:
lib/vfs/interface.c: In function 'mc_chdir':
lib/vfs/interface.c:714: error: 'struct vfs_s_super' has no member named 'path_element'
lib/vfs/interface.c:716: error: 'struct vfs_s_super' has no member named 'path_element'
lib/vfs/interface.c:717: error: 'struct vfs_s_super' has no member named 'path_element'
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Steps to reproduce:
* cd ftp://ftp.gnome.org/
* Run "cd" in the panel where the remote site is open
* cd ftp://ftp.kernel.org/
Actual result: The directory content from ftp.gnome.org FTP-server.
Expected results: The directory content from kernel.org FTP-server.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Currently, dialog itself doesn't handle mouse events. It just
resends mouse event to each its widget. If we can several overlapped
widgets (especially, menu bar), there is some problem to decide which
widget must get event at first.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
1) login to any ftp or fish resource
2) select ftp/fish entry and change current path
3) go back to old path
4) press Ctrl+X A (open "Active VFS directories" dialog)
Expected result: should be correct path to current VFS path
Actual result: path is incorrect.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
How to reproduce:
* mkdir -p a/b/c
* touch a/b/c/d
* ln -s d a/b/c/e
* tar -cf bad.tar a
* rm -rf a
* cd bad.tar/utar://a/b/c
Expected result: 'e' should be valid symlink to 'd'
Actual result: 'e' looks like broken link
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
When mc is compiled with SEARCH_TYPE_PCRE (and without SEARCH_TYPE_GLIB,
e.g. on systems with old glib < 2.14) case (in)sensitive search works in opposite.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
On Mac OS X, in the iTerm2, when the LANG variable is set to en_US.utf-8
mcedit specifically does not correctly accept input (every character press
is interpreted as a '.'). However when LANG is set to en_US.UTF-8 mcedit
works correctly (see also http://code.google.com/p/iterm2/issues/detail?id=204).
On Linux, nl_langinfo(CODESET) returns upper case UTF-8 whether the LANG is set
to utf-8 or UTF-8.
On Mac OS X, it returns the same case as the LANG input.
So let tranform result of nl_langinfo(CODESET) to upper case unconditionally.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
If [Preallocate space] option is enabled, MC can't copy zero-length files:
"Cannot preallocate space for target file ... Invalid argument (22)"
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
fixed trouble with internal editor macro engine introduced by commit #68a8745f6dd7ded9437317a694225d599745e983
now record input char and commands.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
Unlike S-Lang, NCurses always wraps long lines and unable trancate that
to pring only visible part of text. Therefore we have to implement our
own addch() wrappers.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
New method of widget ID assignment:
now widget ID is a value of unsigned long type. Dlg_head structure now has
new filed widget_id that contains a ID of the next added widget. When new
widget is added into dialog, widget_id is set as ID of it and then
incremented.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
* path elements now are separated and shown one-by-one
(eg. ftp://some.in.net instead of ~/some/path/ftp://some.in.net)
* encoding info is shown separated at top of header line
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
added bindings 'ScrollLeft', 'ScrollRight' for scroll long filenames in panel
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
some code & typo fixes.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Hexadecimal values like "2d f0" can be used as well as "0x2d 0xf0"
in all search dialogs where hexadecimal search is supported.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Until 4.7 '/' was forward and '?' backward search.
In current releases both keys are bound to ViewSearch
so one must manually choose Backwards option in the dialog.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
Initial state: forced suspend the previous screen when new screen has
been created. Forced resume the current screen when the previous screen
has been closed. Don't redraw suspended screens, just set sinch_pending
flag. Screen will be redrawn immediately after resume.
This commit allow ret rid of setup_panels() call if screen is resized
and filemanager is not active screen at that time.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
The ancient way of reporting mouse coordinates only supports coordinates
up to 231, so if your terminal is wider (or taller, but that's unlikely),
you cannot use your mouse in the rightmost columns.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
After #2361, smb vfs module doesn't work at all.
The error message "Cannot chdir to ..." raises after hostname enter.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Since content of keymap file is ASCII-only and case insensitive,
don't use some utf8-manipulation: g_ascii_strcasecmp() is used
instead of str_casecmp().
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
added ".." at the top of file list (after external panelization)
added ".." at the top of file list (after 'find' panelization)
disable ctrl-r (refresh) for panelized content
added menu entry Left\Panelize, to restore panelized panel
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
Minor changes in goto_parent_dir()
many code optimization
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
little fixup
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
When platform does not define HAVE_POSIX_FALLOCATE we get this error:
CC vfs.lo
../../../../mc/lib/vfs/vfs.c: In function 'vfs_preallocate':
../../../../mc/lib/vfs/vfs.c:613:12: error: 'dest_desc' undeclared (first use in this function)
../../../../mc/lib/vfs/vfs.c:613:12: note: each undeclared identifier is reported only once for each function it appears in
../../../../mc/lib/vfs/vfs.c:610:22: warning: unused parameter 'dest_vfs_fd' [-Wunused-parameter]
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
For FTP servers, that do not send ".." in directory listing, mc adds one space to the name of every file and directory. Attached patch should fix this problem.
Steps to reproduce:
cd /#ftp:ftp.symantec.com
Expected result:
Correct list of files/directories
Actual result:
File/directory names with leading spaces
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Sometimes when text contain multibyte UTF-8 chars, editor shows two dots instead of some letter.
When moving text cursor after that letter it will be displayed properly.
When moving cursor back (before letter) it will be displayed again as two dots.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
added UTF8_CHAR_LEN
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
(vfs_s_close): vfs-specific data of file handler
vfs_file_handler_t::data is freed in vfs_s_subclass::fh_close method and
then can be used in vfs_s_subclass::file_store_one. Bug is related to
ftp and fish VFSes.
Added new vfs_s_subclass::fh_free_data method to free vfs-specific data
of file handler vfs_file_handler_t::data. Use it in ftp and vfs VFSes.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
(vfs_class_data_find_by_handle, vfs_class_find_by_handle): move same
code to the separate function vfs_get_openfile().
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
If first element is relative, the result path should be also relative
not absolute.
If first element is empty, the result path is relative.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
input_complete.c:874:26: warning: use of logical && with constant
operand; switch to bitwise & or remove constant
[-Wconstant-logical-operand]
if (q && q[1] == '(' && INPUT_COMPLETE_COMMANDS)
^ ~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Required for some terminals (screen/tmux) to force needed mouse type
(BUTTON_EVENT by default).
Normal tracking mode sends an escape sequence on both button press and release.
Mouse highlight tracking notifies a program of a button press, receives a range of
lines from the program, highlights the region covered by the mouse within that
range until button release, and then sends the program the release coordinates.
It is enabled by specifying parameter 1001 to DECSET.
Button-event tracking is essentially the same as normal tracking, but xterm also
reports button-motion events. Motion events are reported only if the mouse pointer
has moved to a different character cell. It is enabled by specifying parameter 1002 to DECSET.
On button press or release, xterm sends the same codes used by normal tracking mode.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
changed mc.1.in, added description of command line options -g, --oldmouse.
Signed-off-by: Ilia Maslakov <il.smind@gmail.com>
Unification of tty_shutdown() function as for S-Lang as for NCurses.
Added do_exit_ca_mode() call to the NCurses-based tty_shutdown().
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
The xterm_flag variable was initialized in setup_mc() but used
first time in init_key() and in tty_init() (in do_enter_ca_mode())
before setup_mc() call.
Now xterm initialized in early step of mc start up process and
xterm support and mouse are initialized in tty_init().
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
(mc_search__hex_translate_to_regex): don't use length of original string
after leading whitespace trim.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
files starting with space can't be acessed by mc through ftp - it
shows the file as not having the leading space and attempts to
access it produce 'permission denied' errors.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
brace '}' (which probably isn't 100% correct), this should be checked in tests
for replace_handle_esc_seq function, not process_escape_sequence - it is the
replace_handle_esq_seq who decides whether it is an escape sequence or not.
Also, \x{4344} is usually a code for wide character (UTF-8), and not for "CD".
So we can either ignore the higher bits, or generate wide character codes...
The second would be convenient, but would also introduce a hard-coded UTF-8 charset.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Enables use of escape sequences inside regex replace strings,
Enables UTF-8 caseless search in PCRE.
Supported escape sequences: \DEC, \xHEX, \0OCT, \n, \t, \v,
\b, \r, \f, \a. Any of them could be enclosed into \{}.
Signed-off-by: Slava Zanko <slavazanko@gmail.com>
... to avoid artefacts after printing of non-printable symbols.
(tty_touch_lines): new function to mark modified lines of screen.
(do_refresh): mark lines as modified before redraw of non-fullscreen dialog
and clear entire screen before redraw of fullscreen dialog.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Now history is not saved if it was not modified and content of input
line is equal to history top entry. Thanks Francesco Cosoleto
<cosoleto at gmail dot com> for the original patch.
Also fixed a regression introduced in cff5925598:
after CK_HistoryNext and CK_HistoryPrev actions in input line,
the input line content is not put to the top of history.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
(hist_next): get rid of direct access to the next histroy item.
(history_show): remove redundant check.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
