GNU nano 2.1.4 release.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4301 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,7 +1,105 @@
+GNU nano 2.1.4 - 2008.08.09
+2008-08-08 Chris Allegretta <chrisa@asty.org>
+	* files.c (write_file): Do not go on and attempt to write the main file if writing the backup file failed,
+	  related to Savannah bug 24000.
+	* text.c (do_redo): Fix improperly restoring the text when redoing a line split.
+        * text.c (add_undo): Fix check for multi-line cut check skips adding other new legit events.
+
+2008-07-23 Chris Allegretta <chrisa@asty.org>
+	* text.c: Reset openfile-> to OTHER after an undo or redo so we don't mistakenly
+	  mistakenly think this is an update when it's really an add.  Also
+          Fix an extra ; after an if statement which makes nano try to free a struct which
+          may be NULL
+
+GNU nano 2.1.3 - 2008.08.04
+2008-07-23 Chris Allegretta <chrisa@asty.org>
+	* configure.ac: Add ncursesw dir to include path if lib detected
+
+2008-07-11 Mike Frysinger <vapier@gentoo.org>
+	* doc/nanorc.sample.in: Include the updates files in the default sample nanorc.
+
+2008-07-11 Fabian Groffen <grobian@gentoo.org>
+	* nano.c: Don't include langinfo.h if not using ENABLE_UTF8
+	  (Savannah patch 6565)
+
+2008-07-11 Mitsuya Shibata <mty.shibata@gmail.com>
+	* text.c: Fix crashing in help menu when using certain locales
+	  (Savannah bug 23751)
+
+2008-07-09 Chris Allegretta <chrisa@asty.org>
+        * nano.c/nano.h/global.c/text.c: New generalized undo code, currently
+	  just works for adding and deleting text and splitting and unsplitting lines.
+
+2008-06-29 Chris Allegretta <chrisa@asty.org>
+	* global.c: Fix for not having search history when --disable-justify is used
+	  (Savannah bug 23733)
+
+
+GNU nano 2.1.2 - 2008.06.24
+2008-06-24 Chris Allegretta <chrisa@asty.org>
+	* rcfile.c: Added function check_bad_binding() to look for sequences which
+	  shouldn't be bound, per Savannah bug 22674.
+
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* prompt.c,search.c,global.c: Tentative fix for bug #23144: using arrow 
+	  keys in search buffer affects main window (by Mike Frysinger)
+
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* global.c: Fix for Savannah bug #23442: left/right arrow keys 
+	  do not work with --enable-tiny (by Mike Frysinger)
+
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* files.c,proto.h,text.c: Fix for conflicts with AIX curses
+	  variables, from William Jojo <jojowil@hvcc.edu>
+
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* global.c: Fix for compile error when --disable-speller is used 
+	  (Savannah bug 23227 by Mike Frysinger)
+
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* Fix for seg fault when window size too small, by 
+          Andreas Amann <andreas.amann@tyndall.ie>
+
+GNU nano 2.1.1 - 2008.04.01
+2008-05-31 Chris Allegretta <chrisa@asty.org>
+	* Added the following contributed files, by owner:
+	  Donnie Berkholz <dberkholz@gentoo.org>
+	    * Sample awk.nanorc
+	  Simon Rupf <simon.rupf@int-ag.ch>
+	    * Sample css.nanorc
+	  Josef 'Jupp' Schugt <jupp@rubyforge.org>
+	    * sample ruby.nanorc
+
+2008-03-31 Chris Allegretta <chrisa@asty.org>
+	* global.c: Fix for issues compiling with --enable-tiny and
+	  --enable-multibuffer, as reported by Mike Frysinger.
+	* files.c: Fix the fact that the insert file prompt text did not
+	  properly appears in tiny mode.
+
+2008-03-19  Benno Schulenberg <bensberg@justemail.net>
+	* help.c, nano.c: Fix toggle help not being translated, fix allocation
+	  issue.
+
+2008-03-19  Chris Allegretta <chrisa@asty.org>
+	* gloabl.c: Fix bracket matching sequence to be M-] not M-[, as reported
+	  Nick Warne <nick@ukfsn.org>.
+	* doc/syntax/Makefile.am - Actually include new syntaxes from Mike, etc
+	* debian.nanorc - New debian sources.list config since we're including
+	  gentoo, adapted from Milian Wolff <mail@milianw.de>
+
+2008-03-18  Mike Frysinger <vapier@gentoo.org>
+	* winio.c: Remove unneeded variable in parse_kbinput()
+	* rcfile.c: relocate check_vitals_mapped() function to just above 
+	  where it actually gets used and declare it "static void" in the process
+	* global.c: only declare nano_justify_msg when justify support is enabled
+	* php.nanorc: Php syntax highlighting config
+	* tcl.nanorc: Tcl syntax highlighting config
+	* gentoo.nanorc: Gentoo syntax highlighting config
+
 2008-03-17  Benno Schulenberg <bensberg@justemail.net>
-	* global.c - Fix incorrect first line jump messsage, fix
+	* global.c: Fix incorrect first line jump messsage, fix
 	  more comments to assist translators
-	* winio.c - Fix shortcut labels not being translated.
+	* winio.c: Fix shortcut labels not being translated.
 
 2008-03-17  Mike Frysinger <vapier@gentoo.org>
 	 * */.gitignore: Git ignore files for those running a local git

NEWS

@@ -1,4 +1,44 @@
-2008/03/18 - GNU nano 2.1.0 "under old mismanagement" is released.
+2008.08.09 - GNU nano 2.1.4 "I told you so!" is released.  This release
+		includes fixes for several severe issues with the new
+		undo/redo code.  Also the behavior of writing
+		files when using backup mode has changed as well: if writing
+		the backup file fails, nano will not attempt to write the
+		current file.  This should help folks who enjoy "extreme
+		text editing" i.e. editing files on file systems which
+		are likely to run out of space; see Savannah bug 24000.
+		Have fun with it!
+
+2008.08.04 - GNY nano 2.1.3 "least stable version ever" is released.  This
+		release includes new (and experimental) undo and redo
+		functionality for most text operations.  The default 
+		key bindings are Meta-U for undo and Meta-E for redo, but
+		these can be remapped using the new 2.1 keybinding code.
+		Also included are some fixes for configuring using wide 
+		curses, crashing when invoking the help menu with 
+		certain locales, and not saving the search history when
+		compiled with configure options.
+
+2008.04.24 - GNU nano 2.1.2 "New York City" is released.  This release
+		contains fixes for binding bad keys, some 
+		configure-specific compilation failures, and more issues 
+		with the new input back end and in particular the status 
+		bar.  Also fixed are some long standing issues with 
+		compiling on AIX, and a segfault when making the terminal
+		window too small.  Rest in Peace Tim and George!
+
+2008.04.01 - GNU nano 2.1.1 wont get fooled again.  This release contains
+		fixes for the new user-rebindable keys (in particular
+		bracket match which was mis-bound), and various
+		problems with translations and configure-related 
+		compilation problems are now fixed as well.
+		It also contains new syntax highlighting 
+		definitions for TCL, PHP, Gentoo and Debian-related 
+		files, and some documentation updates as well. 
+		Please continue to send reports with the key 
+		binding code to the Savannah page
+		(https://savannah.gnu.org/bugs/?group=nano).
+		
+2008.03.18 - GNU nano 2.1.0 "under old mismanagement" is released.
 		This first release in the 2.1 development series
 		introduces rebinadble keys for most actions inside
                 the editor.  Please see the nanorc(5) page for
@@ -8,7 +48,7 @@
 		https://savannah.gnu.org/bugs/?group=nano and
 		thanks for sticking with us!
 
-2007/12/20 - GNU nano 2.0.7 keeps its balance.  This release fixes
+2007.12.20- GNU nano 2.0.7 keeps its balance.  This release fixes
 		several bugs, among others: a segfault and several
 		cursor positioning problems when uncutting text or
 		inserting files into the current buffer; a problem where
@@ -30,12 +70,12 @@
 		under the GNU GPL version 3 or later and the GNU FDL
 		version 1.2 or later.  Have fun.
 
-2007/04/26 - GNU nano 2.0.6 "that was quick" is released.  This release
+2007.04.26- GNU nano 2.0.6 "that was quick" is released.  This release
 		fixes a potential segfault after justifying text marked
 		from the bottom up.  It also adds one more minor
 		documentation update.  Enjoy.
 
-2007/04/22 - GNU nano 2.0.5 braces for impact.  Among other things, this
+2007.04.22- GNU nano 2.0.5 braces for impact.  Among other things, this
 		release fixes various problems (including a segfault)
 		when trying to open or save a file in a directory
 		beginning with "~" that isn't a home directory; fixes a

configure.ac

@@ -20,7 +20,7 @@
 #
 # $Id$
 
-AC_INIT([GNU nano], [2.1.0], [nano-devel@gnu.org], [nano])
+AC_INIT([GNU nano], [2.1.4], [nano-devel@gnu.org], [nano])
 AC_CONFIG_SRCDIR([src/nano.c])
 AC_CANONICAL_TARGET([])
 AM_INIT_AUTOMAKE
@@ -417,7 +417,7 @@ if eval "test x$CURSES_LIB_NAME = x"; then
     AC_CHECK_HEADERS(ncurses.h)
 
     if test x$enable_utf8 != xno; then
-	AC_CHECK_LIB(ncursesw, get_wch, [CURSES_LIB="-lncursesw" CURSES_LIB_NAME=ncursesw CURSES_LIB_WIDE=yes])
+	AC_CHECK_LIB(ncursesw, get_wch, [CURSES_LIB="-lncursesw" CPPFLAGS="-I/usr/include/ncursesw $CPPFLAGS" CURSES_LIB_NAME=ncursesw CURSES_LIB_WIDE=yes])
     fi
 
     if eval "test x$CURSES_LIB_NAME = x"; then

doc/man/nanorc.5

@@ -396,6 +396,12 @@ Count the number of words in the current buffer.
 .B refresh
 Refresh the screen.
 .TP
+.B undo
+Undo the text action peformed (add text, delete text, etc).
+.TP
+.B suspend
+Redo the last action which was undone.
+.TP
 .B suspend
 Suspend the editor (if the suspend function is enabled, see the 
 "suspendenable" entry below).

doc/nanorc.sample.in

@@ -222,6 +222,9 @@
 # bind M-A casesens search
 # bind ^S research main
 
+## Set this if your backspace key sends delete most of the time (2.1.3+)
+# bind kdel backspace all
+
 
 ## Nanorc files
 # include "@PKGDATADIR@/nanorc.nanorc"
@@ -229,9 +232,24 @@
 ## C/C++
 # include "@PKGDATADIR@/c.nanorc"
 
+## Cascading Style Sheets
+# include "@PKGDATADIR@/css.nanorc"
+
+## Debian files
+# include "@PKGDATADIR@/debian.nanorc"
+
+## Gentoo files
+# include "@PKGDATADIR@/gentoo.nanorc"
+
 ## HTML
 # include "@PKGDATADIR@/html.nanorc"
 
+## PHP
+# include "@PKGDATADIR@/php.nanorc"
+
+## TCL
+# include "@PKGDATADIR@/tcl.nanorc"
+
 ## TeX
 # include "@PKGDATADIR@/tex.nanorc"
 
@@ -259,6 +277,9 @@
 ## Java
 # include "@PKGDATADIR@/java.nanorc"
 
+## AWK
+# include "@PKGDATADIR@/awk.nanorc"
+
 ## Assembler
 # include "@PKGDATADIR@/asm.nanorc"
 
@@ -267,3 +288,6 @@
 
 ## POV-Ray
 # include "@PKGDATADIR@/pov.nanorc"
+
+## XML-type files
+# include "@PKGDATADIR@/xml.nanorc"

doc/syntax/Makefile.am

@@ -12,6 +12,13 @@ pkgdata_DATA =	asm.nanorc \
 		python.nanorc \
 		ruby.nanorc \
 		sh.nanorc \
-		tex.nanorc
+		tex.nanorc \
+		tcl.nanorc \
+		php.nanorc \
+		gentoo.nanorc \
+		debian.nanorc \
+		awk.nanorc \
+		css.nanorc \
+		xml.nanorc
 
 EXTRA_DIST = $(pkgdata_DATA)

doc/syntax/awk.nanorc

@@ -0,0 +1,38 @@
+## Here is an example for awk.
+##
+syntax "awk" "\.awk$"
+## records
+icolor brightred "\$[0-9A-Z_!@#$*?-]+"
+## awk-set variables
+color red "\<(ARGC|ARGIND|ARGV|BINMODE|CONVFMT|ENVIRON|ERRNO|FIELDWIDTHS)\>"
+color red "\<(FILENAME|FNR|FS|IGNORECASE|LINT|NF|NR|OFMT|OFS|ORS)\>"
+color red "\<(PROCINFO|RS|RT|RSTART|RLENGTH|SUBSEP|TEXTDOMAIN)\>"
+## function declarations and special patterns
+color brightgreen "\<(function|extension|BEGIN|END)\>"
+## operators
+color green "(\{|\}|\(|\)|\;|\]|\[|\\|<|>|!|=|&|\+|-|\*|%|/|\?:|\^|\|)"
+## flow control
+color brightyellow "\<(for|if|while|do|else|in|delete|exit)\>"
+color brightyellow "\<(break|continue|return)\>"
+## I/O statements
+color brightgreen "\<(close|getline|next|nextfile|print|printf)\>"
+color brightgreen "\<(system|fflush)\>"
+## standard functions
+color magenta "\<(atan2|cos|exp|int|log|rand|sin|sqrt|srand)\>"
+color magenta "\<(asort|asorti|gensub|gsub|index|length|match)\>"
+color magenta "\<(split|sprintf|strtonum|sub|substr|tolower|toupper)\>"
+color magenta "\<(mktime|strftime|systime)\>"
+color magenta "\<(and|compl|lshift|or|rshift|xor)\>"
+color magenta "\<(bindtextdomain|dcgettext|dcngettext)\>"
+
+##
+## String highlighting.  You will in general want your comments and
+## strings to come last, because syntax highlighting rules will be
+## applied in the order they are read in.
+color brightyellow "<[^= 	]*>" ""(\\.|[^"])*""
+
+## Comment highlighting
+color brightblue "(^|[[:space:]])#.*$"
+
+## Trailing whitespace
+color ,green "[[:space:]]+$"

doc/syntax/css.nanorc

@@ -0,0 +1,9 @@
+## Here is an example for css files.
+##
+syntax "css" "\.css$"
+color brightred     "."
+color brightyellow  start="\{" end="\}"
+color brightwhite   start=":" end="([;^\{]|$)"
+color brightblue    ":active|:focus|:hover|:link|:visited|:link|:after|:before|$"
+color brightblue    start="\/\*" end="\\*/"
+color green         ";|:|\{|\}"

doc/syntax/debian.nanorc

@@ -0,0 +1,20 @@
+## Here is an exmaple for apt's sources.list
+## Adapted from http://milianw.de/blog/Syntax-Highlighting-in-Nano
+## (mail@milianw.de).
+##
+syntax "apt/sources.list" "sources\.list(\.old|~)?$"
+# component
+color brightmagenta "^deb(-src)? ((http|file|ftp):/[^ ]+|cdrom:\[[^\]]+\]/|cdrom:\[[-a-zA-Z0-9\._\(\) ]+\]/) [^ ]+ .+$"
+# distribution
+color brightred "^deb(-src)? ((http|file|ftp):/[^ ]+|cdrom:\[[^\]]+\]/|cdrom:\[[-a-zA-Z0-9\._\(\) ]+\]/) [^ ]+"
+# URI
+color brightgreen "(http|file|ftp):/[^ ]+"
+# cdroms
+# [^\]] does not work...
+color brightgreen "cdrom:\[[-a-zA-Z0-9\._\(\) ]+\]/"
+# deb / deb-src
+color yellow "^deb"
+color yellow "^deb-src"
+# comments
+color brightblue "#.*"
+

doc/syntax/gentoo.nanorc

@@ -0,0 +1,50 @@
+## Here is an example for Gentoo ebuilds/eclasses
+##
+syntax "ebuild" "\.e(build|class)$"
+## All the standard portage functions
+color brightgreen "^src_(unpack|compile|install|test)" "^pkg_(config|nofetch|setup|(pre|post)(inst|rm))"
+## Highlight bash related syntax
+color green "\<(case|do|done|elif|else|esac|exit|fi|for|function|if|in|local|read|return|select|shift|then|time|until|while|continue|break)\>"
+color green "(\{|\}|\(|\)|\;|\]|\[|`|\\|\$|<|>|!|=|&|\|)"
+color green "-(e|d|f|r|g|u|w|x|L)\>"
+color green "-(eq|ne|gt|lt|ge|le|s|n|z)\>"
+## Highlight variables ... official portage ones in red, all others in bright red
+color brightred "\$\{?[a-zA-Z_0-9]+\}?"
+color red "\<(ARCH|HOMEPAGE|DESCRIPTION|IUSE|SRC_URI|LICENSE|SLOT|KEYWORDS|FILESDIR|WORKDIR|(P|R)?DEPEND|PROVIDE|DISTDIR|RESTRICT|USERLAND)\>"
+color red "\<(S|D|T|PV|PF|P|PN|A)\>" "\<C(XX)?FLAGS\>" "\<LDFLAGS\>" "\<C(HOST|TARGET|BUILD)\>"
+## Highlight portage commands
+color magenta "\<use(_(with|enable))?\> [!a-zA-Z0-9_+ -]*" "inherit.*"
+color brightblue "\<e(begin|end|conf|install|make|warn|infon?|error|log|patch|new(group|user))\>"
+color brightblue "\<die\>" "\<use(_(with|enable))?\>" "\<inherit\>" "\<has\>" "\<(has|best)_version\>" "\<unpack\>"
+color brightblue "\<(do|new)(ins|s?bin|doc|lib(|\.so|\.a)|man|info|exe|initd|confd|envd|pam|menu|icon)\>"
+color brightblue "\<do(python|sed|dir|hard|sym|html|jar|mo)\>" "\<keepdir\>"
+color brightblue "prepall(|docs|info|man|strip)" "prep(info|lib|lib\.(so|a)|man|strip)"
+color brightblue "\<(|doc|ins|exe)into\>" "\<f(owners|perms)\>" "\<(exe|ins|dir)opts\>"
+## Highlight common commands used in ebuilds
+color blue "\<make\>" "\<(cat|cd|chmod|chown|cp|echo|env|export|grep|let|ln|mkdir|mv|rm|sed|set|tar|touch|unset)\>"
+## Highlight comments (doesnt work that well)
+color yellow "#.*$"
+## Highlight strings (doesnt work that well)
+color brightyellow ""(\\.|[^\"])*"" "'(\\.|[^'])*'"
+## Trailing space is bad!
+color ,green "[[:space:]]+$"
+
+## Here is an example for Portage control files
+##
+syntax "/etc/portage" "\.(keywords|mask|unmask|use)$"
+## Base text:
+color green "^.+$"
+## Use flags:
+color brightred "[[:space:]]+\+?[a-zA-Z0-9_-]+"
+color brightblue "[[:space:]]+-[a-zA-Z0-9_-]+"
+## Likely version numbers:
+color magenta "-[[:digit:]].*([[:space:]]|$)"
+## Accepted arches:
+color white "[~-]?\<(alpha|amd64|arm|hppa|ia64|mips|ppc|ppc64|s390|sh|sparc|x86|x86-fbsd)\>"
+color white "[[:space:]][~-]?\*"
+## Categories:
+color cyan "^[[:space:]]*.*/"
+## Masking regulators:
+color brightmagenta "^[[:space:]]*(=|~|<|<=|=<|>|>=|=>)"
+## Comments:
+color yellow "#.*$"

doc/syntax/php.nanorc

@@ -0,0 +1,30 @@
+## Here is an example for PHP
+##
+syntax "php" "\.php[2345s~]?$"
+
+## php markings
+color brightgreen "(<\?(php)?|\?>)"
+
+## functions
+color white "\<[a-z_]*\("
+
+## types
+color green "\<(var|float|global|double|bool|char|int|enum|const)\>"
+
+## structure
+color brightyellow "\<(class|new|private|public|function|for|foreach|if|while|do|else|elseif|case|default|switch)\>"
+
+## control flow
+color magenta "\<(goto|continue|break|return)\>"
+
+## strings
+color brightyellow "<[^=       ]*>" ""(\.|[^"])*""
+
+## comments
+color brightblue "//.*"
+color brightblue start="/\*" end="\*/"
+#color blue start="<" end=">"
+#color red "&[^;[[:space:]]]*;"
+
+## Trailing whitespace
+color ,green "[[:space:]]+$"

doc/syntax/tcl.nanorc

@@ -0,0 +1,16 @@
+syntax "tcl" "\.tcl$"
+
+## Standard Tcl [info commands]
+color green "\<(after|append|array|auto_execok|auto_import|auto_load|auto_load_index|auto_qualify|binary|break|case|catch|cd|clock|close|concat|continue|encoding|eof|error|eval|exec|exit|expr|fblocked|fconfigure|fcopy|file|fileevent|flush|for|foreach|format|gets|glob|global|history|if|incr|info|interp|join|lappend|lindex|linsert|list|llength|load|lrange|lreplace|lsearch|lset|lsort|namespace|open|package|pid|puts|pwd|read|regexp|regsub|rename|return|scan|seek|set|socket|source|split|string|subst|switch|tclLog|tell|time|trace|unknown|unset|update|uplevel|upvar|variable|vwait|while)\>"
+## Basic Tcl sub commands.
+color green "\<(array anymore|array donesearch|array exists|array get|array names|array nextelement|array set|array size|array startsearch|array statistics|array unset)\>"
+color green "\<(string bytelength|string compare|string equal|string first|string index|string is|string last|string length|string map|string match|string range|string repeat|string replace|string to|string tolower|string totitle|string toupper|string trim|string trimleft|string trimright|string will|string wordend|string wordstart)\>"
+## Extended TclX [info commands]
+color green "\<(alarm|auto_load_pkg|bsearch|catclose|catgets|catopen|ccollate|cconcat|cequal|chgrp|chmod|chown|chroot|cindex|clength|cmdtrace|commandloop|crange|csubstr|ctoken|ctype|dup|echo|execl|fcntl|flock|fork|fstat|ftruncate|funlock|host_info|id|infox|keyldel|keylget|keylkeys|keylset|kill|lassign|lcontain|lempty|lgets|link|lmatch|loadlibindex|loop|lvarcat|lvarpop|lvarpush|max|min|nice|pipe|profile|random|readdir|replicate|scancontext|scanfile|scanmatch|select|server_accept|server_create|signal|sleep|sync|system|tclx_findinit|tclx_fork|tclx_load_tndxs|tclx_sleep|tclx_system|tclx_wait|times|translit|try_eval|umask|wait)\>"
+## Syntax.
+color brightblue "proc[[:space:]]" "(\{|\})"
+color green "(\(|\)|\;|`|\\|\$|<|>|!|=|&|\|)"
+color brightyellow ""(\\.|[^"])*"" "'(\\.|[^'])*'"
+icolor brightred "\$\{?[0-9A-Z_!@#$*?-]+\}?"
+color ,green "[[:space:]]+$"
+color ,magenta "^([[:space:]]+|)#.*"

doc/syntax/xml.nanorc

@@ -0,0 +1,9 @@
+## Here is an example for xml files.
+##
+syntax "xml" "\.([jrs]html?|sgml?|xml|xslt?)$"
+color green  start="<" end=">"
+color cyan   "<[^> ]+"
+color cyan   ">"
+color yellow start="<!DOCTYPE" end="[/]?>"
+color yellow start="<!--" end="-->"
+color red    "&[^;]*;"

src/cut.c

@@ -28,7 +28,6 @@
 
 static bool keep_cutbuffer = FALSE;
 	/* Should we keep the contents of the cutbuffer? */
-static filestruct *cutbottom = NULL;
 	/* Pointer to the end of the cutbuffer. */
 
 /* Indicate that we should no longer keep the contents of the
@@ -114,7 +113,7 @@ void cut_to_eof(void)
  * position to the end of the file into the cutbuffer. */
 void do_cut_text(
 #ifndef NANO_TINY
-	bool copy_text, bool cut_till_end
+	bool copy_text, bool cut_till_end, bool undoing
 #else
 	void
 #endif
@@ -163,6 +162,7 @@ void do_cut_text(
     keep_cutbuffer = TRUE;
 
 #ifndef NANO_TINY
+
     if (cut_till_end) {
 	/* If cut_till_end is TRUE, move all text up to the end of the
 	 * file into the cutbuffer. */
@@ -204,12 +204,14 @@ void do_cut_text(
 	 * disturbing the text. */
 	if (!old_no_newlines)
 	    UNSET(NO_NEWLINES);
-    } else
+    } else if (!undoing)
+	update_undo(CUT);
 #endif
 	/* Leave the text in the cutbuffer, and mark the file as
 	 * modified. */
 	set_modified();
 
+
     /* Update the screen. */
     edit_refresh();
 
@@ -221,9 +223,12 @@ void do_cut_text(
 /* Move text from the current filestruct into the cutbuffer. */
 void do_cut_text_void(void)
 {
+#ifndef NANO_TINY
+    add_undo(CUT);
+#endif
     do_cut_text(
 #ifndef NANO_TINY
-	FALSE, FALSE
+	FALSE, FALSE, FALSE
 #endif
 	);
 }
@@ -233,13 +238,16 @@ void do_cut_text_void(void)
  * back into the filestruct afterward. */
 void do_copy_text(void)
 {
-    do_cut_text(TRUE, FALSE);
+    do_cut_text(TRUE, FALSE, FALSE);
 }
 
 /* Cut from the current cursor position to the end of the file. */
 void do_cut_till_end(void)
 {
-    do_cut_text(FALSE, TRUE);
+#ifndef NANO_TINY
+    add_undo(CUTTOEND);
+#endif
+    do_cut_text(FALSE, TRUE, FALSE);
 }
 #endif /* !NANO_TINY */
 

src/files.c

@@ -75,6 +75,8 @@ void initialize_buffer(void)
     openfile->fmt = NIX_FILE;
 
     openfile->current_stat = NULL;
+    openfile->undotop = NULL;
+    openfile->current_undo = NULL;
 #endif
 #ifdef ENABLE_COLOR
     openfile->colorstrings = NULL;
@@ -99,7 +101,7 @@ void initialize_buffer_text(void)
 
 /* If it's not "", filename is a file to open.  We make a new buffer, if
  * necessary, and then open and read the file, if applicable. */
-void open_buffer(const char *filename)
+void open_buffer(const char *filename, bool undoable)
 {
     bool new_buffer = (openfile == NULL
 #ifdef ENABLE_MULTIBUFFER
@@ -140,7 +142,7 @@ void open_buffer(const char *filename)
     /* If we have a non-new file, read it in.  Then, if the buffer has
      * no stat, update the stat, if applicable. */
     if (rc == 0) {
-	read_file(f, filename);
+	read_file(f, filename, undoable);
 #ifndef NANO_TINY
 	if (openfile->current_stat == NULL) {
 	    openfile->current_stat =
@@ -190,7 +192,7 @@ void replace_buffer(const char *filename)
 
     /* If we have a non-new file, read it in. */
     if (rc == 0)
-	read_file(f, filename);
+	read_file(f, filename, FALSE);
 
     /* Move back to the beginning of the first line of the buffer. */
     openfile->current = openfile->fileage;
@@ -337,8 +339,9 @@ filestruct *read_line(char *buf, filestruct *prevnode, bool
 }
 
 /* Read an open file into the current buffer.  f should be set to the
- * open file, and filename should be set to the name of the file. */
-void read_file(FILE *f, const char *filename)
+ * open file, and filename should be set to the name of the file.
+   undoable  means do we want to create undo records to try and undo this */
+void read_file(FILE *f, const char *filename, bool undoable)
 {
     size_t num_lines = 0;
 	/* The number of lines in the file. */
@@ -369,6 +372,11 @@ void read_file(FILE *f, const char *filename)
     buf = charalloc(bufx);
     buf[0] = '\0';
 
+#ifndef NANO_TINY
+    if (undoable)
+	add_undo(INSERT);
+#endif
+
     if (openfile->current == openfile->fileage)
 	first_line_ins = TRUE;
     else
@@ -487,7 +495,7 @@ void read_file(FILE *f, const char *filename)
     /* If we didn't get a file and we don't already have one, open a
      * blank buffer. */
     if (fileptr == NULL)
-	open_buffer("");
+	open_buffer("", FALSE);
 
     /* Attach the file we got to the filestruct.  If we got a file of
      * zero bytes, don't do anything. */
@@ -559,6 +567,9 @@ void read_file(FILE *f, const char *filename)
     openfile->placewewant = xplustabs();
 
 #ifndef NANO_TINY
+    if (undoable)
+	update_undo(INSERT);
+
     if (format == 3)
 	statusbar(
 		P_("Read %lu line (Converted from DOS and Mac format)",
@@ -738,7 +749,9 @@ void do_insertfile(
 #endif
 		MINSERTFILE, ans,
 		&meta_key, &func_key,
+#ifndef NANO_TINY
 		NULL,
+#endif
 		edit_refresh, msg,
 #ifndef DISABLE_OPERATINGDIR
 		operating_dir != NULL && strcmp(operating_dir,
@@ -849,7 +862,7 @@ void do_insertfile(
 #ifdef ENABLE_MULTIBUFFER
 		if (ISSET(MULTIBUFFER))
 		    /* Open a blank buffer. */
-		    open_buffer("");
+		    open_buffer("", FALSE);
 #endif
 
 		/* Save the command's output in the current buffer. */
@@ -873,7 +886,7 @@ void do_insertfile(
 
 		/* Save the file specified in answer in the current
 		 * buffer. */
-		open_buffer(answer);
+		open_buffer(answer, TRUE);
 #ifndef NANO_TINY
 	    }
 #endif
@@ -1461,14 +1474,15 @@ bool write_file(const char *name, FILE *f_open, bool tmp, append_type
 	    free(backuptemp);
 	    backuptemp = get_next_filename(backupname, "~");
 	    if (*backuptemp == '\0') {
-		statusbar(_("Error writing %s: %s"), backupname,
+		statusbar(_("Error writing backup file %s: %s"), backupname,
 		    _("Too many backup files?"));
 		free(backuptemp);
 		free(backupname);
-		/* If we can't write to the backup, go on, since only
-		 * saving the original file is better than saving
-		 * nothing. */
-		goto skip_backup;
+		/* If we can't write to the backup, DONT go on, since
+		   whatever caused the backup file to fail (e.g. disk
+		   full may well cause the real file write to fail, which
+		   means we could lose both the backup and the original! */
+		goto cleanup_and_exit;
 	    } else {
 		free(backupname);
 		backupname = backuptemp;
@@ -1485,14 +1499,16 @@ bool write_file(const char *name, FILE *f_open, bool tmp, append_type
 
 	if (backup_file == NULL || chmod(backupname,
 		openfile->current_stat->st_mode) == -1) {
-	    statusbar(_("Error writing %s: %s"), backupname,
+	    statusbar(_("Error writing backup file %s: %s"), backupname,
 		strerror(errno));
 	    free(backupname);
 	    if (backup_file != NULL)
 		fclose(backup_file);
-	    /* If we can't write to the backup, go on, since only saving
-	     * the original file is better than saving nothing. */
-	    goto skip_backup;
+	    /* If we can't write to the backup, DONT go on, since
+	       whatever caused the backup file to fail (e.g. disk
+	       full may well cause the real file write to fail, which
+	       means we could lose both the backup and the original! */
+	    goto cleanup_and_exit;
 	}
 
 #ifdef DEBUG
@@ -1512,17 +1528,19 @@ bool write_file(const char *name, FILE *f_open, bool tmp, append_type
 			strerror(errno));
 		beep();
 	    } else
-		statusbar(_("Error writing %s: %s"), backupname,
+		statusbar(_("Error writing backup file %s: %s"), backupname,
 			strerror(errno));
-	    /* If we can't read from or write to the backup, go on,
-	     * since only saving the original file is better than saving
-	     * nothing. */
+	    /* If we can't write to the backup, DONT go on, since
+	       whatever caused the backup file to fail (e.g. disk
+	       full may well cause the real file write to fail, which
+	       means we could lose both the backup and the original! */
+	    goto cleanup_and_exit;
 	}
 
 	free(backupname);
     }
 
-  skip_backup:
+    skip_backup:
 #endif /* !NANO_TINY */
 
     /* If NOFOLLOW_SYMLINKS is set and the file is a link, we aren't
@@ -2393,7 +2411,7 @@ char *input_tab(char *buf, bool allow_files, size_t *place, bool
 	} else if (!*lastwastab || num_matches < 2)
 	    *lastwastab = TRUE;
 	else {
-	    int longest_name = 0, columns, editline = 0;
+	    int longest_name = 0, ncols, editline = 0;
 
 	    /* Now we show a list of the available choices. */
 	    assert(num_matches > 1);
@@ -2418,7 +2436,7 @@ char *input_tab(char *buf, bool allow_files, size_t *place, bool
 	    /* Each column will be (longest_name + 2) columns wide, i.e.
 	     * two spaces between columns, except that there will be
 	     * only one space after the last column. */
-	    columns = (COLS + 1) / (longest_name + 2);
+	    ncols = (COLS + 1) / (longest_name + 2);
 
 	    /* Blank the edit window, and print the matches out
 	     * there. */
@@ -2432,11 +2450,11 @@ char *input_tab(char *buf, bool allow_files, size_t *place, bool
 		char *disp;
 
 		wmove(edit, editline, (longest_name + 2) *
-			(match % columns));
+			(match % ncols));
 
-		if (match % columns == 0 &&
+		if (match % ncols == 0 &&
 			editline == editwinrows - 1 &&
-			num_matches - match > columns) {
+			num_matches - match > ncols) {
 		    waddstr(edit, _("(more)"));
 		    break;
 		}
@@ -2446,7 +2464,7 @@ char *input_tab(char *buf, bool allow_files, size_t *place, bool
 		waddstr(edit, disp);
 		free(disp);
 
-		if ((match + 1) % columns == 0)
+		if ((match + 1) % ncols == 0)
 		    editline++;
 	    }
 

src/global.c

@@ -1,5 +1,4 @@
-/* $Id$ 
-*/
+/* $Id$ */
 /**************************************************************************
  *   global.c                                                             *
  *                                                                        *
@@ -22,11 +21,12 @@
  *                                                                        *
  **************************************************************************/
 
+#include "proto.h"
+
 #include <ctype.h>
 #include <string.h>
 #include <strings.h>
 #include "assert.h"
-#include "proto.h"
 
 /* Global variables. */
 #ifndef NANO_TINY
@@ -69,6 +69,7 @@ int editwinrows = 0;
 
 filestruct *cutbuffer = NULL;
 	/* The buffer where we store cut text. */
+filestruct *cutbottom = NULL;
 #ifndef DISABLE_JUSTIFY
 filestruct *jusbuffer = NULL;
 	/* The buffer where we store unjustified text. */
@@ -150,11 +151,6 @@ const shortcut *currshortcut;
 int currmenu;
 	/* The currently loaded menu */
 
-#ifndef NANO_TINY
-toggle *toggles = NULL;
-	/* The global toggle list. */
-#endif
-
 sc *sclist = NULL;
 	/* New shortcut key struct */
 subnfunc *allfuncs = NULL;
@@ -501,7 +497,9 @@ void shortcut_init(bool unjustify)
 	;
     const char *nano_writeout_msg =
 	N_("Write the current file to disk");
+#ifndef DISABLE_JUSTIFY
     const char *nano_justify_msg = N_("Justify the current paragraph");
+#endif
     const char *nano_insert_msg =
 	N_("Insert another file into the current one");
     const char *nano_whereis_msg =
@@ -526,6 +524,8 @@ void shortcut_init(bool unjustify)
 	N_("Copy the current line and store it in the cutbuffer");
     const char *nano_indent_msg = N_("Indent the current line");
     const char *nano_unindent_msg = N_("Unindent the current line");
+    const char *nano_undo_msg = N_("Undo the last operation");
+    const char *nano_redo_msg = N_("Redo the last undone operation");
 #endif
     const char *nano_forward_msg = N_("Go forward one character");
     const char *nano_back_msg = N_("Go back one character");
@@ -658,7 +658,11 @@ void shortcut_init(bool unjustify)
 #endif
 	exit_msg, IFSCHELP(nano_exit_msg), FALSE, VIEW);
 
-    add_to_funcs(do_exit, MBROWSER|MHELP, exit_msg, IFSCHELP(nano_exit_msg), FALSE, VIEW);
+    add_to_funcs(do_exit, MHELP, exit_msg, IFSCHELP(nano_exit_msg), FALSE, VIEW);
+
+#ifndef DISABLE_BROWSER
+    add_to_funcs(do_exit, MBROWSER, exit_msg, IFSCHELP(nano_exitbrowser_msg), FALSE, VIEW);
+#endif
 
     /* TRANSLATORS: Try to keep this at most 10 characters. */
     add_to_funcs(do_writeout_void, MMAIN, N_("WriteOut"),
@@ -692,6 +696,7 @@ void shortcut_init(bool unjustify)
     add_to_funcs(do_page_down, MMAIN|MHELP,
 	next_page_msg, IFSCHELP(nano_nextpage_msg), TRUE, VIEW);
 
+
     /* TRANSLATORS: Try to keep this at most 10 characters. */
     add_to_funcs(do_cut_text_void, MMAIN, N_("Cut Text"), IFSCHELP(nano_cut_msg),
 	FALSE, NOVIEW);
@@ -765,7 +770,13 @@ void shortcut_init(bool unjustify)
 	nano_indent_msg, FALSE, NOVIEW);
 
     add_to_funcs(do_unindent, MMAIN, N_("Unindent Text"),
-	nano_unindent_msg, TRUE, NOVIEW);
+	nano_unindent_msg, FALSE, NOVIEW);
+
+    add_to_funcs(do_undo, MMAIN, N_("Undo"),
+	nano_undo_msg, FALSE, NOVIEW);
+
+    add_to_funcs(do_redo, MMAIN, N_("Redo"),
+	nano_redo_msg, TRUE, NOVIEW);
 
 #endif
 
@@ -824,9 +835,9 @@ void shortcut_init(bool unjustify)
 
 #ifdef ENABLE_MULTIBUFFER
     add_to_funcs(switch_to_prev_buffer_void, MMAIN, _("Previous File"),
-	nano_prevfile_msg, FALSE, VIEW);
+	IFSCHELP(nano_prevfile_msg), FALSE, VIEW);
     add_to_funcs(switch_to_next_buffer_void, MMAIN, N_("Next File"),
-	nano_nextfile_msg, TRUE, VIEW);
+	IFSCHELP(nano_nextfile_msg), TRUE, VIEW);
 #endif
 
     add_to_funcs(do_verbatim_input, MMAIN, N_("Verbatim Input"),
@@ -1026,7 +1037,7 @@ void shortcut_init(bool unjustify)
     add_to_sclist(MMAIN, "F10", do_uncut_text, 0, TRUE);
     add_to_sclist(MMAIN, "^C", do_cursorpos_void, 0, TRUE);
     add_to_sclist(MMAIN, "F11", do_cursorpos_void, 0, TRUE);
-#ifndef NANO_TINY
+#ifndef DISABLE_SPELLER
     add_to_sclist(MMAIN, "^T", do_spell, 0, TRUE);
     add_to_sclist(MMAIN, "F12", do_spell, 0, TRUE);
 #endif
@@ -1049,23 +1060,31 @@ void shortcut_init(bool unjustify)
     add_to_sclist(MMAIN, "M-6", do_copy_text, 0, TRUE);
     add_to_sclist(MMAIN, "M-}", do_indent_void, 0, TRUE);
     add_to_sclist(MMAIN, "M-{", do_unindent, 0, TRUE);
+    add_to_sclist(MMAIN, "M-U", do_undo, 0, TRUE);
+    add_to_sclist(MMAIN, "M-E", do_redo, 0, TRUE);
     add_to_sclist(MALL, "^F", do_right, 0, TRUE);
-    add_to_sclist(MALL, "kright", do_right, 0, TRUE);
     add_to_sclist(MALL, "^B", do_left, 0, TRUE);
-    add_to_sclist(MALL, "kleft", do_left, 0, TRUE);
     add_to_sclist(MMAIN, "^Space", do_next_word_void, 0, TRUE);
     add_to_sclist(MMAIN, "M-Space", do_prev_word_void, 0, TRUE);
 #endif
+    add_to_sclist(MALL, "kright", do_right, 0, TRUE);
+    add_to_sclist(MALL, "kleft", do_left, 0, TRUE);
     add_to_sclist(MMAIN, "^Q", xon_complaint, 0, TRUE);
     add_to_sclist(MMAIN, "^S", xoff_complaint, 0, TRUE);
-    add_to_sclist(MALL, "^P", do_up_void, 0, TRUE);
-    add_to_sclist(MALL, "kup", do_up_void, 0, TRUE);
-    add_to_sclist(MALL, "^N", do_down_void, 0, TRUE);
-    add_to_sclist(MALL, "kdown", do_down_void, 0, TRUE);
+    add_to_sclist(MMAIN, "^P", do_up_void, 0, TRUE);
+    add_to_sclist(MMAIN, "kup", do_up_void, 0, TRUE);
+    add_to_sclist(MMAIN, "^N", do_down_void, 0, TRUE);
+    add_to_sclist(MMAIN, "kdown", do_down_void, 0, TRUE);
     add_to_sclist(MALL, "^A", do_home, 0, TRUE);
     add_to_sclist(MALL, "khome", do_home, 0, TRUE);
     add_to_sclist(MALL, "^E", do_end, 0, TRUE);
     add_to_sclist(MALL, "kend", do_end, 0, TRUE);
+#ifndef NANO_TINY
+    add_to_sclist(MWHEREIS|MREPLACE|MREPLACE2|MWHEREISFILE, "^P", (void *) prev_history_msg, 0, FALSE);
+    add_to_sclist(MWHEREIS|MREPLACE|MREPLACE2|MWHEREISFILE, "kup", (void *) prev_history_msg, 0, FALSE);
+    add_to_sclist(MWHEREIS|MREPLACE|MREPLACE2|MWHEREISFILE, "^N", (void *) next_history_msg, 0, FALSE);
+    add_to_sclist(MWHEREIS|MREPLACE|MREPLACE2|MWHEREISFILE, "kdown", (void *) next_history_msg, 0, FALSE);
+#endif
 #ifndef DISABLE_JUSTIFY
     add_to_sclist(MWHEREIS|MREPLACE|MREPLACE2,
 	"^W", do_para_begin_void, 0, TRUE);
@@ -1101,7 +1120,7 @@ void shortcut_init(bool unjustify)
     add_to_sclist(MBROWSER|MWHEREISFILE, "M-/", (void *) last_file_msg, 0, TRUE);
     add_to_sclist(MBROWSER|MWHEREISFILE, "M-?", (void *) last_file_msg, 0, TRUE);
 #ifndef NANO_TINY
-    add_to_sclist(MMAIN, "M-[", do_find_bracket, 0, TRUE);
+    add_to_sclist(MMAIN, "M-]", do_find_bracket, 0, TRUE);
     add_to_sclist(MMAIN, "M--", do_scroll_up, 0, TRUE);
     add_to_sclist(MMAIN, "M-_", do_scroll_up, 0, TRUE);
     add_to_sclist(MMAIN, "M-+", do_scroll_down, 0, TRUE);
@@ -1321,6 +1340,10 @@ sc *strtosc(int menu, char *input)
 	s->scfunc = do_find_bracket;
     else if (!strcasecmp(input, "wordcount"))
 	s->scfunc = do_wordlinechar_count;
+    else if (!strcasecmp(input, "undo"))
+	s->scfunc = do_undo;
+    else if (!strcasecmp(input, "redo"))
+	s->scfunc = do_redo;
     else if (!strcasecmp(input, "prevhistory")) {
 	s->scfunc = (void *) prev_history_msg;
 	s->execute = FALSE;
@@ -1424,6 +1447,8 @@ sc *strtosc(int menu, char *input)
 	s->scfunc = do_enter;
     else if (!strcasecmp(input, "delete"))
 	s->scfunc = do_delete;
+    else if (!strcasecmp(input, "backspace"))
+	s->scfunc = do_backspace;
     else if (!strcasecmp(input, "refresh"))
 	s->scfunc = total_refresh;
     else if (!strcasecmp(input, "casesens")) {
@@ -1564,15 +1589,6 @@ void thanks_for_all_the_fish(void)
 #ifndef DISABLE_JUSTIFY
     if (jusbuffer != NULL)
 	free_filestruct(jusbuffer);
-#endif
-#ifndef NANO_TINY
-    /* Free the memory associated with each toggle. */
-    while (toggles != NULL) {
-	toggle *t = toggles;
-
-	toggles = toggles->next;
-	free(t);
-    }
 #endif
     /* Free the memory associated with each open file buffer. */
     if (openfile != NULL)

src/help.c

@@ -414,7 +414,7 @@ void help_init(void)
 
 	for (s = sclist; s != NULL; s = s->next)
             if (s->scfunc == (void *) do_toggle)
-		allocsize += strlen(flagtostr(s->toggle)) + endis_len + 9;
+		allocsize += strlen(_(flagtostr(s->toggle))) + endis_len + 9;
 
     }
 #endif

src/nano.c

@@ -1,4 +1,4 @@
-/* $Id$ */
+/* $Id$ */ 
 /**************************************************************************
  *   nano.c                                                               *
  *                                                                        *
@@ -32,7 +32,9 @@
 #include <errno.h>
 #include <ctype.h>
 #include <locale.h>
+#ifdef ENABLE_UTF8
 #include <langinfo.h>
+#endif
 #include <termios.h>
 #ifdef HAVE_GETOPT_H
 #include <getopt.h>
@@ -502,6 +504,9 @@ openfilestruct *make_new_opennode(void)
     newnode->filebot = NULL;
     newnode->edittop = NULL;
     newnode->current = NULL;
+#ifndef NANO_TINY
+    newnode->last_action = OTHER;
+#endif
 
     return newnode;
 }
@@ -611,7 +616,7 @@ void die(const char *msg, ...)
     va_end(ap);
 
     /* Save the current file buffer if it's been modified. */
-    if (openfile->modified) {
+    if (openfile && openfile->modified) {
 	/* If we've partitioned the filestruct, unpartition it now. */
 	if (filepart != NULL)
 	    unpartition_filestruct(&filepart);
@@ -1250,7 +1255,7 @@ void do_toggle(int flag)
 	)
 	enabled = !enabled;
 
-    desc = flagtostr(flag);
+    desc = _(flagtostr(flag));
     statusbar("%s %s", desc, enabled ? _("enabled") :
 	_("disabled"));
 }
@@ -1642,6 +1647,9 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
 	set_modified();
 
 #ifndef NANO_TINY
+	update_undo(ADD);
+
+
 	/* Note that current_x has not yet been incremented. */
 	if (openfile->mark_set && openfile->current ==
 		openfile->mark_begin && openfile->current_x <
@@ -2224,7 +2232,7 @@ int main(int argc, char **argv)
 		icol == 1)
 		parse_line_column(&argv[i][1], &iline, &icol);
 	    else {
-		open_buffer(argv[i]);
+		open_buffer(argv[i], FALSE);
 
 		if (iline > 1 || icol > 1) {
 		    do_gotolinecolumn(iline, icol, FALSE, FALSE, FALSE,
@@ -2241,14 +2249,14 @@ int main(int argc, char **argv)
      * buffer or a new buffer, depending on whether multibuffer mode is
      * enabled. */
     if (optind < argc)
-	open_buffer(argv[optind]);
+	open_buffer(argv[optind], FALSE);
 
     /* We didn't open any files if all the command line arguments were
      * invalid files like directories or if there were no command line
      * arguments given.  In this case, we have to load a blank buffer.
      * Also, we unset view mode to allow editing. */
     if (openfile == NULL) {
-	open_buffer("");
+	open_buffer("", FALSE);
 	UNSET(VIEW_MODE);
     }
 

src/nano.h

@@ -169,6 +169,10 @@ typedef enum {
     CONTROL, META, FKEY, RAW
 }  function_type;
 
+typedef enum {
+    ADD, DEL, REPLACE, SPLIT, UNSPLIT, CUT, CUTTOEND, UNCUT, INSERT, OTHER
+} undo_type;
+
 /* Structure types. */
 typedef struct filestruct {
     char *data;
@@ -245,6 +249,40 @@ typedef struct syntaxtype {
 } syntaxtype;
 #endif /* ENABLE_COLOR */
 
+#ifndef NANO_TINY
+typedef struct undo {
+    ssize_t lineno;
+    undo_type type;
+	/* What type of undo was this */
+    int begin;
+	/* Where did this  action begin or end */
+    char *strdata;
+	/* String type data we will use for ccopying the affected line back */
+    int xflags;
+	/* Some flag data we need */
+
+    /* Cut specific stuff we need */
+    filestruct *cutbuffer;
+	/* Copy of the cutbuffer */
+    filestruct *cutbottom;
+	/* Copy of cutbottom */
+    bool mark_set;
+	/* was the marker set when we cut */
+    bool to_end;
+	/* was this a cut to end */
+    ssize_t mark_begin_lineno;
+	/* copy copy copy */
+    ssize_t mark_begin_x;
+	/* Another shadow variable */
+    ssize_t linescut;
+	/* How many lines we cut on a straight non-marked non-to-end cut */
+    struct undo *next;
+} undo;
+
+
+#endif /* NANO_TINY */
+
+
 typedef struct openfilestruct {
     char *filename;
 	/* The current file's name. */
@@ -278,6 +316,11 @@ typedef struct openfilestruct {
 	/* The current file's format. */
     struct stat *current_stat;
 	/* The current file's stat. */
+    undo *undotop;
+	/* Top of the undo list */
+    undo *current_undo;
+	/* The current (i.e. n ext) level of undo */
+    undo_type last_action;
 #endif
 #ifdef ENABLE_COLOR
     colortype *colorstrings;
@@ -318,25 +361,6 @@ typedef struct shortcut {
 	/* Next shortcut. */
 } shortcut;
 
-#ifndef NANO_TINY
-typedef struct toggle {
-   int val;
-	/* The sequence to toggle the key.  We should only need one. */
-   const char *desc;
-	/* The description of the toggle, e.g. "Cut to end"; we'll
-	 * append Enabled or Disabled to it. */
-#ifndef DISABLE_HELP
-   bool blank_after;
-	/* Whether there should be a blank line after the description of
-	 * the toggle. */
-#endif
-   long flag;
-	/* Which flag actually gets toggled. */
-   struct toggle *next;
-	/* Next toggle. */
-} toggle;
-#endif
-
 #ifdef ENABLE_NANORC
 typedef struct rcoption {
    const char *name;
@@ -667,6 +691,11 @@ typedef struct subnfunc {
 #define TOGGLE_BACKWARDS_KEY		NANO_META_B
 #define TOGGLE_DOS_KEY			NANO_META_D
 #define TOGGLE_MAC_KEY			NANO_META_M
+
+/* Extra bits for the undo function */
+#define UNDO_DEL_DEL		(1<<0)
+#define UNDO_DEL_BACKSPACE	(1<<1)
+
 #endif /* !NANO_TINY */
 
 #define VIEW TRUE

src/prompt.c

@@ -1010,7 +1010,7 @@ fprintf(stderr, "get_prompt_string: answer = \"%s\", statusbar_x = %d\n", answer
 	} else 
 #endif /* !DISABLE_TABCOMP */
 #ifndef NANO_TINY
-	if (s && s->scfunc == do_up_void) {
+	if (s && s->scfunc == (void *) prev_history_msg) {
 		if (history_list != NULL) {
 		    /* If we're scrolling up at the bottom of the
 		     * history list and answer isn't blank, save answer
@@ -1038,7 +1038,7 @@ fprintf(stderr, "get_prompt_string: answer = \"%s\", statusbar_x = %d\n", answer
 		     * statusbar prompt. */
 		    finished = FALSE;
 		}
-	} else if (s && s->scfunc == do_down_void) {
+	} else if (s && s->scfunc == (void *) next_history_msg) {
 		if (history_list != NULL) {
 		    /* Get the newer search from the history list and
 		     * save it in answer.  If there is no newer search,

src/proto.h

@@ -47,6 +47,7 @@ extern WINDOW *bottomwin;
 extern int editwinrows;
 
 extern filestruct *cutbuffer;
+extern filestruct *cutbottom;
 #ifndef DISABLE_JUSTIFY
 extern filestruct *jusbuffer;
 #endif
@@ -60,6 +61,7 @@ extern char *matchbrackets;
 #if !defined(NANO_TINY) && defined(ENABLE_NANORC)
 extern char *whitespace;
 extern int whitespace_len[2];
+extern undo_type last_action;
 #endif
 
 #ifndef DISABLE_JUSTIFY
@@ -100,9 +102,6 @@ extern char *syntaxstr;
 
 extern const shortcut *currshortcut;
 extern int currmenu;
-#ifndef NANO_TINY
-extern toggle *toggles;
-#endif
 
 #ifndef NANO_TINY
 extern filestruct *search_history;
@@ -240,7 +239,7 @@ void cut_to_eof(void);
 #endif
 void do_cut_text(
 #ifndef NANO_TINY
-	bool copy_text, bool cut_till_end
+	bool copy_text, bool cut_till_end, bool undoing
 #else
 	void
 #endif
@@ -256,7 +255,7 @@ void do_uncut_text(void);
 void make_new_buffer(void);
 void initialize_buffer(void);
 void initialize_buffer_text(void);
-void open_buffer(const char *filename);
+void open_buffer(const char *filename, bool undoable);
 #ifndef DISABLE_SPELLER
 void replace_buffer(const char *filename);
 #endif
@@ -269,7 +268,7 @@ bool close_buffer(void);
 #endif
 filestruct *read_line(char *buf, filestruct *prevnode, bool
 	*first_line_ins, size_t buf_len);
-void read_file(FILE *f, const char *filename);
+void read_file(FILE *f, const char *filename, bool undoable);
 int open_file(const char *filename, bool newfie, FILE **f);
 char *get_next_filename(const char *name, const char *suffix);
 void do_insertfile(
@@ -619,6 +618,8 @@ void do_tab(void);
 void do_indent(ssize_t cols);
 void do_indent_void(void);
 void do_unindent(void);
+void do_undo(void);
+void do_redo(void);
 #endif
 void do_enter(void);
 #ifndef NANO_TINY
@@ -632,7 +633,7 @@ bool do_wrap(filestruct *line);
 #if !defined(DISABLE_HELP) || !defined(DISABLE_WRAPJUSTIFY)
 ssize_t break_line(const char *line, ssize_t goal
 #ifndef DISABLE_HELP
-	, bool newline
+	, bool newln
 #endif
 	);
 #endif
@@ -706,8 +707,11 @@ void new_magicline(void);
 void remove_magicline(void);
 void mark_order(const filestruct **top, size_t *top_x, const filestruct
 	**bot, size_t *bot_x, bool *right_side_up);
+void add_undo(undo_type current_action);
+void update_undo(undo_type action);
 #endif
 size_t get_totsize(const filestruct *begin, const filestruct *end);
+filestruct *fsfromline(ssize_t lineno);
 #ifdef DEBUG
 void dump_filestruct(const filestruct *inptr);
 void dump_filestruct_reverse(void);
@@ -739,9 +743,6 @@ int get_mouseinput(int *mouse_x, int *mouse_y, bool allow_shortcuts);
 const sc *get_shortcut(int menu, int *kbinput, bool
 	*meta_key, bool *func_key);
 const sc *first_sc_for(int menu, void *func);
-#ifndef NANO_TINY
-const toggle *get_toggle(int kbinput, bool meta_key);
-#endif
 void blank_line(WINDOW *win, int y, int x, int n);
 void blank_titlebar(void);
 void blank_topbar(void);
@@ -788,6 +789,8 @@ const char *cancel_msg;
 #ifndef NANO_TINY
 const char *case_sens_msg;
 const char *backwards_msg;
+const char *prev_history_msg;
+const char *next_history_msg;
 #endif
 const char *replace_msg;
 const char *no_replace_msg;

src/rcfile.c

@@ -347,6 +347,20 @@ void parse_syntax(char *ptr)
     }
 }
 
+int check_bad_binding(sc *s)
+{
+#define BADLISTLEN 1
+    int badtypes[BADLISTLEN] = {META};
+    int badseqs[BADLISTLEN] = { 91 };
+    int i;
+
+    for (i = 0; i < BADLISTLEN; i++)
+        if (s->type == badtypes[i] && s->seq == badseqs[i])
+	    return 1;
+
+    return 0;
+}
+
 void parse_keybinding(char *ptr)
 {
     char *keyptr = NULL, *keycopy = NULL, *funcptr = NULL, *menuptr = NULL;
@@ -366,7 +380,7 @@ void parse_keybinding(char *ptr)
     for (i = 0; i < strlen(keycopy); i++)
 	keycopy[i] = toupper(keycopy[i]);
 
-    if (keycopy[0] != 'M' && keycopy[0] != '^' && keycopy[0] != 'F') {
+    if (keycopy[0] != 'M' && keycopy[0] != '^' && keycopy[0] != 'F' && keycopy[0] != 'K') {
 	rcfile_error(
 		N_("keybindings must begin with \"^\", \"M\", or \"F\"\n"));
 	return;
@@ -405,9 +419,11 @@ void parse_keybinding(char *ptr)
 		N_("Could not map name \"%s\" to a function\n"), funcptr);
 	return;
     }
+
+
 #ifdef DEBUG
     fprintf(stderr, "newsc now address %d, menu func assigned = %d, menu = %d\n",
-	(int) newsc, (int) newsc->scfunc, menu);
+	&newsc, &newsc->scfunc, menu);
 #endif
 
 
@@ -420,6 +436,13 @@ void parse_keybinding(char *ptr)
     fprintf(stderr, "s->seq = \"%d\"\n", newsc->seq);
 #endif
 
+    if (check_bad_binding(newsc)) {
+	rcfile_error(
+		N_("Sorry, keystr \"%s\" is an illegal binding\n"), newsc->keystr);
+	return;
+    }
+
+
     /* now let's have some fun.  Try and delete the other entries
        we found for the same menu, then make this new new
        beginning */
@@ -478,6 +501,10 @@ void parse_include(char *ptr)
     nanorc = full_option;
     lineno = 0;
 
+#ifdef DEBUG
+    fprintf(stderr, "Parsing file \"%s\"\n", full_option);
+#endif
+
     parse_rcfile(rcstream
 #ifdef ENABLE_COLOR
 	, TRUE
@@ -690,6 +717,32 @@ void parse_colors(char *ptr, bool icase)
 }
 #endif /* ENABLE_COLOR */
 
+/* Check whether the user has unmapped every shortcut for a
+sequence we consider 'vital', like the exit function */
+static void check_vitals_mapped(void)
+{
+    subnfunc *f;
+    int v;
+#define VITALS 5
+    void *vitals[VITALS] = { do_exit, do_exit, (void *) cancel_msg, (void *) cancel_msg, (void *) cancel_msg };
+    int inmenus[VITALS] = { MMAIN, MHELP, MWHEREIS, MREPLACE, MGOTOLINE };
+
+    for  (v = 0; v < VITALS; v++) {
+       for (f = allfuncs; f != NULL; f = f->next) {
+           if (f->scfunc == vitals[v] && f->menus & inmenus[v]) {
+               const sc *s = first_sc_for(inmenus[v], f->scfunc);
+               if (!s) {
+                   rcfile_error(N_("Fatal error: no keys mapped for function \"%s\""),
+                       f->desc);
+                   fprintf(stderr, N_("Exiting.  Please use nano with the -I option if needed to adjust your nanorc settings\n"));
+                   exit(1);
+               }
+           break;
+           }
+       }
+    }
+}
+
 /* Parse the rcfile, once it has been opened successfully at rcstream,
  * and close it afterwards.  If syntax_only is TRUE, only allow the file
  * to contain color syntax commands: syntax, color, and icolor. */
@@ -965,6 +1018,10 @@ void do_rcfile(void)
 		_("\"%s\" is a device file"), nanorc);
     }
 
+#ifdef DEBUG
+    fprintf(stderr, "Parsing file \"%s\"\n", nanorc);
+#endif
+
     /* Try to open the system-wide nanorc. */
     rcstream = fopen(nanorc, "rb");
     if (rcstream != NULL)
@@ -1022,30 +1079,4 @@ void do_rcfile(void)
 #endif
 }
 
-/* Check whether the user has unmapped every shortcut for a
-sequence we consider 'vital', like the exit function */
-int check_vitals_mapped(void)
-{
-    subnfunc *f;
-    int v;
-#define VITALS 5
-    void *vitals[VITALS] = { do_exit, do_exit, (void *) cancel_msg, (void *) cancel_msg, (void *) cancel_msg };
-    int inmenus[VITALS] = { MMAIN, MHELP, MWHEREIS, MREPLACE, MGOTOLINE };
-
-    for  (v = 0; v < VITALS; v++) {
-	for (f = allfuncs; f != NULL; f = f->next) {
-	    if (f->scfunc == vitals[v] && f->menus & inmenus[v]) {
-		const sc *s = first_sc_for(inmenus[v], f->scfunc);
-		if (!s) {
-		    rcfile_error(N_("Fatal error: no keys mapped for function \"%s\""),
-			f->desc);
-		    fprintf(stderr, N_("Exiting.  Please use nano with the -I option if needed to adjust your nanorc settings\n"));
-		    exit(1);
-		}
-	    break;
-	    }
-	}
-    }
-}
-
 #endif /* ENABLE_NANORC */

src/search.c

@@ -788,6 +788,9 @@ ssize_t do_replace_loop(
 	    char *copy;
 	    size_t length_change;
 
+#ifndef NANO_TINY
+	    update_undo(REPLACE);
+#endif
 	    if (i == 2)
 		replaceall = TRUE;
 

src/text.c

@@ -1,4 +1,4 @@
-/* $Id$ */
+/* $Id$ */ 
 /**************************************************************************
  *   text.c                                                               *
  *                                                                        *
@@ -70,6 +70,10 @@ void do_delete(void)
 	/* Do we have to call edit_refresh(), or can we get away with
 	 * just update_line()? */
 
+#ifndef NANO_TINY
+    update_undo(DEL);
+#endif
+
     assert(openfile->current != NULL && openfile->current->data != NULL && openfile->current_x <= strlen(openfile->current->data));
 
     openfile->placewewant = xplustabs();
@@ -359,6 +363,284 @@ void do_unindent(void)
 {
     do_indent(-tabsize);
 }
+
+/* Undo the last thing(s) we did */
+void do_undo(void)
+{
+    undo *u = openfile->current_undo;
+    filestruct *f = openfile->current, *t;
+    int len = 0;
+    char *undidmsg, *data;
+    filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
+
+    if (!u) {
+	statusbar(_("Nothing in undo buffer!"));
+	return;
+    }
+
+
+    if (u->lineno <= f->lineno)
+        for (; f->prev != NULL && f->lineno != u->lineno; f = f->prev)
+	    ;
+    else
+        for (; f->next != NULL && f->lineno != u->lineno; f = f->next)
+	    ;
+    if (f->lineno != u->lineno) {
+        statusbar(_("Couldnt match current undo line"));
+	return;
+    }
+#ifdef DEBUG
+    fprintf(stderr, "data we're about to undo = \"%s\"\n", f->data);
+    fprintf(stderr, "Undo running for type %d\n", u->type);
+#endif
+
+    openfile->current_x = u->begin;
+    switch(u->type) {
+    case ADD:
+	undidmsg = _("text add");
+	len = strlen(f->data) - strlen(u->strdata) + 1;
+        data = charalloc(len);
+        strncpy(data, f->data, u->begin);
+	strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
+	free(f->data);
+	f->data = data;
+	break;
+    case DEL:
+	undidmsg = _("text delete");
+	len = strlen(f->data) + strlen(u->strdata) + 1;
+	data = charalloc(len);
+
+	strncpy(data, f->data, u->begin);
+	strcpy(&data[u->begin], u->strdata);
+	strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
+	free(f->data);
+	f->data = data;
+	if (u->xflags == UNDO_DEL_BACKSPACE)
+	    openfile->current_x += strlen(u->strdata);
+	break;
+    case SPLIT:
+	undidmsg = _("line split");
+	free(f->data);
+	f->data = mallocstrcpy(NULL, u->strdata);
+	if (f->next != NULL) {
+	    filestruct *tmp = f->next;
+	    unlink_node(tmp);
+	    delete_node(tmp);
+	}
+	renumber(f);
+	break;
+    case UNSPLIT:
+	undidmsg = _("line join");
+	t = make_new_node(f);
+	t->data = mallocstrcpy(NULL, u->strdata);
+	data = mallocstrncpy(NULL, f->data, u->begin);
+	data[u->begin] = '\0';
+	free(f->data);
+	f->data = data;
+	splice_node(f, t, f->next);
+	renumber(f);
+	break;
+    case CUT:
+    case CUTTOEND:
+	undidmsg = _("text cut");
+	cutbuffer = copy_filestruct(u->cutbuffer);
+
+        /* Compute cutbottom for the uncut using out copy */
+	for (cutbottom = cutbuffer; cutbottom->next != NULL; cutbottom = cutbottom->next)
+	    ;
+
+	/* Get to where we need to uncut from */
+	if (u->mark_set && u->mark_begin_lineno < u->lineno)
+	    do_gotolinecolumn(u->mark_begin_lineno, u->mark_begin_x+1, FALSE, FALSE, FALSE, FALSE);
+	else
+	    do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
+
+	do_uncut_text();
+	free_filestruct(cutbuffer);
+	cutbuffer = NULL;
+	break;
+    case INSERT:
+	undidmsg = _("text insert");
+	cutbuffer = NULL;
+	cutbottom = NULL;
+	/* When we updated mark_begin_lineno in update_undo, it was effectively how many line
+	   were inserted due to being partitioned before read_file was called.  So we
+	   add its value here */
+	openfile->mark_begin = fsfromline(u->lineno + u->mark_begin_lineno - 1);
+	openfile->mark_begin_x = 0;
+	openfile->mark_set = TRUE;
+	do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
+	cut_marked();
+	u->cutbuffer = cutbuffer;
+	u->cutbottom = cutbottom;
+	cutbuffer = oldcutbuffer;
+	cutbottom = oldcutbottom;
+	openfile->mark_set = FALSE;
+	break;
+    case REPLACE:
+	undidmsg = _("text replace");
+	data = u->strdata;
+	u->strdata = f->data;
+	f->data = data;
+	break;
+    default:
+	undidmsg = _("wtf?");
+	break;
+
+    }
+    do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
+    statusbar(_("Undid action (%s)"), undidmsg);
+    openfile->current_undo = openfile->current_undo->next;
+    openfile->last_action = OTHER;
+}
+
+void do_redo(void)
+{
+    undo *u = openfile->undotop;
+    filestruct *f = openfile->current, *t;
+    filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
+    int len = 0, i;
+    char *undidmsg, *data;
+
+    for (; u != NULL && u->next != openfile->current_undo; u = u->next)
+	;
+    if (!u) {
+	statusbar(_("Nothing to re-do!"));
+	return;
+    }
+    if (u->next != openfile->current_undo) {
+	statusbar(_("Can't find previous undo to re-do, argh"));
+	return;
+    }
+
+    if (u->lineno <= f->lineno)
+        for (; f->prev != NULL && f->lineno != u->lineno; f = f->prev)
+	    ;
+    else
+        for (; f->next != NULL && f->lineno != u->lineno; f = f->next)
+	    ;
+    if (f->lineno != u->lineno) {
+        statusbar(_("Couldnt match current undo line"));
+	return;
+    }
+#ifdef DEBUG
+    fprintf(stderr, "data we're about to redo = \"%s\"\n", f->data);
+    fprintf(stderr, "Redo running for type %d\n", u->type);
+#endif
+
+    switch(u->type) {
+    case ADD:
+	undidmsg = _("text add");
+	len = strlen(f->data) + strlen(u->strdata) + 1;
+        data = charalloc(len);
+	strncpy(data, f->data, u->begin);
+	strcpy(&data[u->begin], u->strdata);
+	strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
+	free(f->data);
+	f->data = data;
+	break;
+    case DEL:
+	undidmsg = _("text delete");
+	len = strlen(f->data) + strlen(u->strdata) + 1;
+	data = charalloc(len);
+        strncpy(data, f->data, u->begin);
+	strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
+	free(f->data);
+	f->data = data;
+	break;
+    case SPLIT:
+	undidmsg = _("line split");
+	t = make_new_node(f);
+	t->data = mallocstrcpy(NULL, &u->strdata[u->begin]);
+	data = mallocstrncpy(NULL, f->data, u->begin);
+	data[u->begin] = '\0';
+	free(f->data);
+	f->data = data;
+	splice_node(f, t, f->next);
+	renumber(f);
+	break;
+    case UNSPLIT:
+	undidmsg = _("line join");
+	len = strlen(f->data) + strlen(u->strdata + 1);
+	data = charalloc(len);
+	strcpy(data, f->data);
+	strcat(data, u->strdata);
+	free(f->data);
+	f->data = data;
+	if (f->next != NULL) {
+	    filestruct *tmp = f->next;
+	    unlink_node(tmp);
+	    delete_node(tmp);
+	}
+	renumber(f);
+	break;
+    case CUT:
+    case CUTTOEND:
+	undidmsg = _("line cut");
+	do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
+	openfile->mark_set = u->mark_set;
+	if (cutbuffer)
+	    free(cutbuffer);
+	cutbuffer = NULL;
+
+	/* Move ahead the same # lines we had if a marked cut */
+	if (u->mark_set) {
+	    for (i = 1, t = openfile->fileage; i != u->mark_begin_lineno; i++)
+		t = t->next;
+	    openfile->mark_begin = t;
+	} else if (!u->to_end) {
+	    /* Here we have a regular old potentially multi-line ^K cut.  We'll
+		need to trick nano into thinking it's a marked cut to cut more
+		than one line again */
+#ifdef DEBUG
+	    fprintf(stderr, "Undoing multi-^K cut, u->linescut = %d\n", u->linescut);
+#endif
+	    for (i = 0, t = openfile->current; i < u->linescut; i++) {
+
+#ifdef DEBUG
+	    fprintf(stderr, "Advancing, lineno  = %d, data = \"%s\"\n", t->lineno, t->data);
+#endif
+		t = t->next;
+	    }
+	    openfile->mark_begin = t;
+	    openfile->mark_begin_x = 0;
+	    openfile->mark_set = TRUE;
+	}
+
+	openfile->mark_begin_x = u->mark_begin_x;
+	do_cut_text(FALSE, u->to_end, TRUE);
+	openfile->mark_set = FALSE;
+        openfile->mark_begin = NULL;
+        openfile->mark_begin_x = 0;
+	edit_refresh();
+	break;
+    case REPLACE:
+	undidmsg = _("text replace");
+	data = u->strdata;
+	u->strdata = f->data;
+	f->data = data;
+	break;
+     case INSERT:
+	undidmsg = _("text insert");
+	cutbuffer = u->cutbuffer;
+	cutbottom = u->cutbottom;
+	do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
+	do_uncut_text();
+	cutbuffer = oldcutbuffer;
+	cutbottom = oldcutbottom;
+	break;
+    default:
+	undidmsg = _("wtf?");
+	break;
+
+    }
+    do_gotolinecolumn(u->lineno, u->begin, FALSE, FALSE, FALSE, TRUE);
+    statusbar(_("Redid action (%s)"), undidmsg);
+
+    openfile->current_undo = u;
+    openfile->last_action = OTHER;
+
+}
 #endif /* !NANO_TINY */
 
 /* Someone hits Enter *gasp!* */
@@ -367,9 +649,12 @@ void do_enter(void)
     filestruct *newnode = make_new_node(openfile->current);
     size_t extra = 0;
 
-    assert(openfile->current != NULL && openfile->current->data != NULL);
+    assert(openfile->current != NULL && xopenfile->current->data != NULL);
 
 #ifndef NANO_TINY
+    update_undo(SPLIT);
+
+
     /* Do auto-indenting, like the neolithic Turbo Pascal editor. */
     if (ISSET(AUTOINDENT)) {
 	/* If we are breaking the line in the indentation, the new
@@ -495,7 +780,7 @@ bool execute_command(const char *command)
     if (f == NULL)
 	nperror("fdopen");
 
-    read_file(f, "stdin");
+    read_file(f, "stdin", TRUE);
 
     if (wait(NULL) == -1)
 	nperror("wait");
@@ -510,6 +795,223 @@ bool execute_command(const char *command)
 
     return TRUE;
 }
+
+/* Add a new undo struct to the top of the current pile */
+void add_undo(undo_type current_action)
+{
+    undo *u;
+    char *data;
+    openfilestruct *fs = openfile;
+
+    /* Ugh, if we were called while cutting not-to-end, non-marked and on the same lineno,
+       we need to  abort here */
+    u = fs->current_undo;
+    if (current_action == CUT && u && u->type == CUT 
+	&& !u->mark_set && u->lineno == fs->current->lineno)
+	return;
+
+    /* Blow away the old undo stack if we are starting from the middle */
+    while (fs->undotop != NULL && fs->undotop != fs->current_undo) {
+	undo *u2 = fs->undotop;
+	fs->undotop = fs->undotop->next;
+	if (u2->strdata != NULL)
+	    free(u2->strdata);
+	if (u2->cutbuffer)
+	    free_filestruct(u2->cutbuffer);
+	free(u2);
+    }
+
+    /* Allocate and initialize a new undo type */
+    u = nmalloc(sizeof(undo));
+    u->type = current_action;
+    u->lineno = fs->current->lineno;
+    u->begin = fs->current_x;
+    u->next = fs->undotop;
+    fs->undotop = u;
+    fs->current_undo = u;
+    u->strdata = NULL;
+    u->cutbuffer = NULL;
+    u->cutbottom  = NULL;
+    u->mark_begin_lineno = 0;
+    u->mark_begin_x = 0;
+    u->linescut = 0;
+    u->xflags = 0;
+
+    switch (u->type) {
+    /* We need to start copying data into the undo buffer or we wont be able
+       to restore it later */
+    case ADD:
+        data = charalloc(2);
+        data[0] = fs->current->data[fs->current_x];
+        data[1] = '\0';
+        u->strdata = data;
+	break;
+    case DEL:
+	if (u->begin != strlen(fs->current->data)) {
+            data = mallocstrncpy(NULL, &fs->current->data[u->begin], 2);
+            data[1] = '\0';
+            u->strdata = data;
+	    break;
+	}
+	/* Else purposely fall into unsplit code */
+	current_action = u->type = UNSPLIT;
+    case UNSPLIT:
+	if (fs->current->next) {
+	    data = mallocstrcpy(NULL, fs->current->next->data);
+	    u->strdata = data;
+	}
+	break;
+    case INSERT:
+    case SPLIT:
+    case REPLACE:
+	data = mallocstrcpy(NULL, fs->current->data);
+	u->strdata = data;
+	break;
+    case CUT:
+    case CUTTOEND:
+	u->mark_set = openfile->mark_set;
+	if (u->mark_set) {
+	    u->mark_begin_lineno = openfile->mark_begin->lineno;
+	    u->mark_begin_x = openfile->mark_begin_x;
+	}
+	u->to_end = (current_action == CUTTOEND);
+	break;
+    case UNCUT:
+	break;
+    case OTHER:
+	statusbar(_("OOPS. Tried to add unknown thing to undo struct, I'd save your work"));
+	break;
+    }
+
+#ifdef DEBUG
+    fprintf(stderr, "fs->current->data = \"%s\", current_x = %d, u->begin = %d, type = %d\n",
+			fs->current->data,  fs->current_x, u->begin, current_action);
+    fprintf(stderr, "left update_add...\n");
+#endif
+    fs->last_action = current_action;
+}
+
+/* Update an undo item, or determine whether a new one
+   is really needed and bounce the data to add_undo
+   instead.  The latter functionality just feels
+   gimmicky and may just be more hassle than
+   it's worth, so it should be axed if needed. */
+void update_undo(undo_type action)
+{
+    undo *u;
+    char *data;
+    int len = 0;
+    openfilestruct *fs = openfile;
+
+#ifdef DEBUG
+        fprintf(stderr, "action = %d, fs->last_action = %d,  openfile->current->lineno = %d",
+		action, fs->last_action, openfile->current->lineno);
+	if (fs->current_undo)
+	    fprintf(stderr, "fs->current_undo->lineno = %d\n",  fs->current_undo->lineno);
+	else
+	    fprintf(stderr, "\n");
+#endif
+
+    /* Change to an add if we're not using the same undo struct
+       that we should be using */
+    if (action != fs->last_action
+	|| (action != CUT && action != CUTTOEND && action != INSERT
+	    && openfile->current->lineno != fs->current_undo->lineno)) {
+        add_undo(action);
+	return;
+    }
+
+    assert(fs->undotop != NULL);
+    u = fs->undotop;
+
+    switch (u->type) {
+    case ADD:
+#ifdef DEBUG
+        fprintf(stderr, "fs->current->data = \"%s\", current_x = %d, u->begin = %d\n",
+			fs->current->data,  fs->current_x, u->begin);
+#endif
+        len = strlen(u->strdata) + 2;
+        data = nrealloc((void *) u->strdata, len * sizeof(char *));
+        data[len-2] = fs->current->data[fs->current_x];
+        data[len-1] = '\0';
+        u->strdata = (char *) data;
+#ifdef DEBUG
+	fprintf(stderr, "current undo data now \"%s\"\n", u->strdata);
+#endif
+	break;
+    case DEL:
+	len = strlen(u->strdata) + 2;
+	assert(len > 2);
+        if (fs->current_x == u->begin) {
+	    /* They're deleting */
+	    if (!u->xflags)
+		u->xflags = UNDO_DEL_DEL;
+	    else if (u->xflags != UNDO_DEL_DEL) {
+		add_undo(action);
+		return;
+	    }
+	    data = charalloc(len);
+	    strcpy(data, u->strdata);
+	    data[len-2] = fs->current->data[fs->current_x];;
+	    data[len-1] = '\0';
+	    free(u->strdata);
+	    u->strdata = data;
+	} else if (fs->current_x == u->begin - 1) {
+	    /* They're backspacing */
+	    if (!u->xflags)
+		u->xflags = UNDO_DEL_BACKSPACE;
+	    else if (u->xflags != UNDO_DEL_BACKSPACE) {
+		add_undo(action);
+		return;
+	    }
+	    data = charalloc(len);
+	    data[0] = fs->current->data[fs->current_x];
+	    strcpy(&data[1], u->strdata);
+	    free(u->strdata);
+	    u->strdata = data;
+	    u->begin--;
+	} else {
+	    /* They deleted something else on the line */
+	    add_undo(DEL);
+	    return;
+	}
+#ifdef DEBUG
+	fprintf(stderr, "current undo data now \"%s\"\nu->begin = %d\n", u->strdata, u->begin);
+#endif
+	break;
+    case CUT:
+    case CUTTOEND:
+    case UNCUT:
+	if (u->cutbuffer)
+	    free(u->cutbuffer);
+	u->cutbuffer = copy_filestruct(cutbuffer);
+	u->cutbottom = cutbottom;
+	u->linescut++;
+	break;
+    case REPLACE:
+	add_undo(action);
+	break;
+    case INSERT:
+	u->mark_begin_lineno = openfile->current->lineno;
+    case SPLIT:
+    case UNSPLIT:
+	/* These cases are handled by the earlier check for a new line and action */
+    case OTHER:
+	break;
+    }
+
+#ifdef DEBUG
+    fprintf(stderr, "Done in udpate_undo (type was %d)\n", action);
+#endif
+    if (fs->last_action != action) {
+#ifdef DEBUG
+	fprintf(stderr, "Starting add_undo for new action as it does not match last_action\n");
+#endif
+	add_undo(action);
+    }
+    fs->last_action = action;
+}
+
 #endif /* !NANO_TINY */
 
 #ifndef DISABLE_WRAPPING
@@ -761,7 +1263,7 @@ bool do_wrap(filestruct *line)
  * blank, as does a '\n' if newline is TRUE. */
 ssize_t break_line(const char *line, ssize_t goal
 #ifndef DISABLE_HELP
-	, bool newline
+	, bool newln
 #endif
 	)
 {
@@ -781,13 +1283,13 @@ ssize_t break_line(const char *line, ssize_t goal
 
 	if (is_blank_mbchar(line)
 #ifndef DISABLE_HELP
-		|| (newline && *line == '\n')
+		|| (newln && *line == '\n')
 #endif
 		) {
 	    blank_loc = cur_loc;
 
 #ifndef DISABLE_HELP
-	    if (newline && *line == '\n')
+	    if (newln && *line == '\n')
 		break;
 #endif
 	}
@@ -800,6 +1302,15 @@ ssize_t break_line(const char *line, ssize_t goal
 	/* In fact, the whole line displays shorter than goal. */
 	return cur_loc;
 
+#ifndef DISABLE_HELP
+    if (newln && blank_loc <= 0) {
+       /* If blank was not found or was found only first character,
+        * force line break. */
+       cur_loc -= line_len;
+       return cur_loc;
+    }
+#endif
+
     if (blank_loc == -1) {
 	/* No blank was found that was short enough. */
 	bool found_blank = FALSE;
@@ -810,7 +1321,7 @@ ssize_t break_line(const char *line, ssize_t goal
 
 	    if (is_blank_mbchar(line)
 #ifndef DISABLE_HELP
-		|| (newline && *line == '\n')
+		|| (newln && *line == '\n')
 #endif
 		) {
 		if (!found_blank)
@@ -834,11 +1345,11 @@ ssize_t break_line(const char *line, ssize_t goal
 
     while (*line != '\0' && (is_blank_mbchar(line)
 #ifndef DISABLE_HELP
-	|| (newline && *line == '\n')
+	|| (newln && *line == '\n')
 #endif
 	)) {
 #ifndef DISABLE_HELP
-	if (newline && *line == '\n')
+	if (newln && *line == '\n')
 	    break;
 #endif
 
@@ -2365,7 +2876,7 @@ void do_spell(void)
 void do_wordlinechar_count(void)
 {
     size_t words = 0, chars = 0;
-    ssize_t lines = 0;
+    ssize_t nlines = 0;
     size_t current_x_save = openfile->current_x;
     size_t pww_save = openfile->placewewant;
     filestruct *current_save = openfile->current;
@@ -2400,7 +2911,7 @@ void do_wordlinechar_count(void)
     /* Get the total line and character counts, as "wc -l"  and "wc -c"
      * do, but get the latter in multibyte characters. */
     if (old_mark_set) {
-	lines = openfile->filebot->lineno -
+	nlines = openfile->filebot->lineno -
 		openfile->fileage->lineno + 1;
 	chars = get_totsize(openfile->fileage, openfile->filebot);
 
@@ -2409,7 +2920,7 @@ void do_wordlinechar_count(void)
 	unpartition_filestruct(&filepart);
 	openfile->mark_set = TRUE;
     } else {
-	lines = openfile->filebot->lineno;
+	nlines = openfile->filebot->lineno;
 	chars = openfile->totsize;
     }
 
@@ -2421,7 +2932,7 @@ void do_wordlinechar_count(void)
     /* Display the total word, line, and character counts on the
      * statusbar. */
     statusbar(_("%sWords: %lu  Lines: %ld  Chars: %lu"), old_mark_set ?
-	_("In Selection:  ") : "", (unsigned long)words, (long)lines,
+	_("In Selection:  ") : "", (unsigned long)words, (long)nlines,
 	(unsigned long)chars);
 }
 #endif /* !NANO_TINY */
@@ -2464,3 +2975,4 @@ void do_verbatim_input(void)
 
     free(output);
 }
+

src/utils.c

@@ -586,6 +586,23 @@ size_t get_totsize(const filestruct *begin, const filestruct *end)
     return totsize;
 }
 
+/* Get back a pointer given a line number in the current openfilestruct */
+filestruct *fsfromline(ssize_t lineno)
+{
+    filestruct *f = openfile->current;
+
+    if (lineno <= openfile->current->lineno)
+	for (; f->lineno != lineno && f != openfile->fileage; f = f->prev)
+	   ;
+    else
+        for (; f->lineno != lineno && f->next != NULL; f = f->next)
+	    ;
+
+    if (f->lineno != lineno)
+	f = NULL;
+    return f;
+}
+
 #ifdef DEBUG
 /* Dump the filestruct inptr to stderr. */
 void dump_filestruct(const filestruct *inptr)

src/winio.c

@@ -329,7 +329,6 @@ int parse_kbinput(WINDOW *win, bool *meta_key, bool *func_key)
 
     *meta_key = FALSE;
     *func_key = FALSE;
-    const sc *s;
 
     /* Read in a character. */
     while ((kbinput = get_input(win, 1)) == NULL);