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Added matchit plugin

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406 doc/matchit.txt
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+*matchit.txt* Extended "%" matching
+
+For instructions on installing this file, type
+ :help matchit-install
+inside Vim.
+
+For Vim version 6.3. Last change: 2007 Aug 29
+
+
+ VIM REFERENCE MANUAL by Benji Fisher
+
+*matchit* *matchit.vim*
+
+1. Extended matching with "%" |matchit-intro|
+2. Activation |matchit-activate|
+3. Configuration |matchit-configure|
+4. Supporting a New Language |matchit-newlang|
+5. Known Bugs and Limitations |matchit-bugs|
+
+The functionality mentioned here is a plugin, see |add-plugin|.
+This plugin is only available if 'compatible' is not set.
+You can avoid loading this plugin by setting the "loaded_matchit" variable
+in your |vimrc| file: >
+ :let loaded_matchit = 1
+
+{Vi does not have any of this}
+
+==============================================================================
+1. Extended matching with "%" *matchit-intro*
+
+ *matchit-%*
+% Cycle forward through matching groups, such as "if", "else", "endif",
+ as specified by |b:match_words|.
+
+ *g%* *v_g%* *o_g%*
+g% Cycle backwards through matching groups, as specified by
+ |b:match_words|. For example, go from "if" to "endif" to "else".
+
+ *[%* *v_[%* *o_[%*
+[% Go to [count] previous unmatched group, as specified by
+ |b:match_words|. Similar to |[{|.
+
+ *]%* *v_]%* *o_]%*
+]% Go to [count] next unmatched group, as specified by
+ |b:match_words|. Similar to |]}|.
+
+ *v_a%*
+a% In Visual mode, select the matching group, as specified by
+ |b:match_words|, containing the cursor. Similar to |v_a[|.
+ A [count] is ignored, and only the first character of the closing
+ pattern is selected.
+
+In Vim, as in plain vi, the percent key, |%|, jumps the cursor from a brace,
+bracket, or paren to its match. This can be configured with the 'matchpairs'
+option. The matchit plugin extends this in several ways:
+
+ You can match whole words, such as "if" and "endif", not just
+ single characters. You can also specify a |regular-expression|.
+ You can define groups with more than two words, such as "if",
+ "else", "endif". Banging on the "%" key will cycle from the "if" to
+ the first "else", the next "else", ..., the closing "endif", and back
+ to the opening "if". Nested structures are skipped. Using |g%| goes
+ in the reverse direction.
+ By default, words inside comments and strings are ignored, unless
+ the cursor is inside a comment or string when you type "%". If the
+ only thing you want to do is modify the behavior of "%" so that it
+ behaves this way, you do not have to define |b:match_words|, since the
+ script uses the 'matchpairs' option as well as this variable.
+
+See |matchit-details| for details on what the script does, and |b:match_words|
+for how to specify matching patterns.
+
+MODES: *matchit-modes* *matchit-v_%* *matchit-o_%*
+
+Mostly, % and related motions (|g%| and |[%| and |]%|) work just like built-in
+|motion| commands in |Operator-pending| and |Visual| modes. However, you
+cannot make these motions |linewise| or |characterwise|, since the |:omap|s
+that define them start with "v" in order to make the default behavior
+inclusive. (See |o_v|.) In other words, "dV%" will not work. The
+work-around is to go through Visual mode: "V%d" will work.
+
+LANGUAGES: *matchit-languages*
+
+Currently, the following languages are supported: Ada, ASP with VBS, Csh,
+DTD, Entity, Essbase, Fortran, HTML, JSP (same as HTML), LaTeX, Lua, Pascal,
+SGML, Shell, Tcsh, Vim, XML. Other languages may already have support via
+the default |filetype-plugin|s in the standard vim distribution.
+
+To support a new language, see |matchit-newlang| below.
+
+DETAILS: *matchit-details* *matchit-parse*
+
+Here is an outline of what matchit.vim does each time you hit the "%" key. If
+there are |backref|s in |b:match_words| then the first step is to produce a
+version in which these back references have been eliminated; if there are no
+|backref|s then this step is skipped. This step is called parsing. For
+example, "\(foo\|bar\):end\1" is parsed to yield
+"\(foo\|bar\):end\(foo\|bar\)". This can get tricky, especially if there are
+nested groups. If debugging is turned on, the parsed version is saved as
+|b:match_pat|.
+
+ *matchit-choose*
+Next, the script looks for a word on the current line that matches the pattern
+just constructed. It includes the patterns from the 'matchpairs' option.
+The goal is to do what you expect, which turns out to be a little complicated.
+The script follows these rules:
+
+ Insist on a match that ends on or after the cursor.
+ Prefer a match that includes the cursor position (that is, one that
+ starts on or before the cursor).
+ Prefer a match that starts as close to the cursor as possible.
+ If more than one pattern in |b:match_words| matches, choose the one
+ that is listed first.
+
+Examples:
+
+ Suppose you >
+ :let b:match_words = '<:>,<tag>:</tag>'
+< and hit "%" with the cursor on or before the "<" in "a <tag> is born".
+ The pattern '<' comes first, so it is preferred over '<tag>', which
+ also matches. If the cursor is on the "t", however, then '<tag>' is
+ preferred, because this matches a bit of text containing the cursor.
+ If the two groups of patterns were reversed then '<' would never be
+ preferred.
+
+ Suppose you >
+ :let b:match_words = 'if:end if'
+< (Note the space!) and hit "%" with the cursor at the end of "end if".
+ Then "if" matches, which is probably not what you want, but if the
+ cursor starts on the "end " then "end if" is chosen. (You can avoid
+ this problem by using a more complicated pattern.)
+
+If there is no match, the cursor does not move. (Before version 1.13 of the
+script, it would fall back on the usual behavior of |%|). If debugging is
+turned on, the matched bit of text is saved as |b:match_match| and the cursor
+column of the start of the match is saved as |b:match_col|.
+
+Next, the script looks through |b:match_words| (original and parsed versions)
+for the group and pattern that match. If debugging is turned on, the group is
+saved as |b:match_ini| (the first pattern) and |b:match_tail| (the rest). If
+there are |backref|s then, in addition, the matching pattern is saved as
+|b:match_word| and a table of translations is saved as |b:match_table|. If
+there are |backref|s, these are determined from the matching pattern and
+|b:match_match| and substituted into each pattern in the matching group.
+
+The script decides whether to search forwards or backwards and chooses
+arguments for the |searchpair()| function. Then, the cursor is moved to the
+start of the match, and |searchpair()| is called. By default, matching
+structures inside strings and comments are ignored. This can be changed by
+setting |b:match_skip|.
+
+==============================================================================
+2. Activation *matchit-activate*
+
+You can use this script as a plugin, by copying it to your plugin directory.
+See |add-global-plugin| for instructions. You can also add a line to your
+|vimrc| file, such as >
+ :source $VIMRUNTIME/macros/matchit.vim
+or >
+ :runtime macros/matchit.vim
+Either way, the script should start working the next time you start up Vim.
+
+(Earlier versions of the script did nothing unless a |buffer-variable| named
+|b:match_words| was defined. Even earlier versions contained autocommands
+that set this variable for various file types. Now, |b:match_words| is
+defined in many of the default |filetype-plugin|s instead.)
+
+For a new language, you can add autocommands to the script or to your vimrc
+file, but the recommended method is to add a line such as >
+ let b:match_words = '\<foo\>:\<bar\>'
+to the |filetype-plugin| for your language. See |b:match_words| below for how
+this variable is interpreted.
+
+TROUBLESHOOTING *matchit-troubleshoot*
+
+The script should work in most installations of Vim. It may not work if Vim
+was compiled with a minimal feature set, for example if the |+syntax| option
+was not enabled. If your Vim has support for syntax compiled in, but you do
+not have |syntax| highlighting turned on, matchit.vim should work, but it may
+fail to skip matching groups in comments and strings. If the |filetype|
+mechanism is turned off, the |b:match_words| variable will probably not be
+defined automatically.
+
+==============================================================================
+3. Configuration *matchit-configure*
+
+There are several variables that govern the behavior of matchit.vim. Note
+that these are variables local to the buffer, not options, so use |:let| to
+define them, not |:set|. Some of these variables have values that matter; for
+others, it only matters whether the variable has been defined. All of these
+can be defined in the |filetype-plugin| or autocommand that defines
+|b:match_words| or "on the fly."
+
+The main variable is |b:match_words|. It is described in the section below on
+supporting a new language.
+
+ *MatchError* *matchit-hl* *matchit-highlight*
+MatchError is the highlight group for error messages from the script. By
+default, it is linked to WarningMsg. If you do not want to be bothered by
+error messages, you can define this to be something invisible. For example,
+if you use the GUI version of Vim and your command line is normally white, you
+can do >
+ :hi MatchError guifg=white guibg=white
+<
+ *b:match_ignorecase*
+If you >
+ :let b:match_ignorecase = 1
+then matchit.vim acts as if 'ignorecase' is set: for example, "end" and "END"
+are equivalent. If you >
+ :let b:match_ignorecase = 0
+then matchit.vim treats "end" and "END" differently. (There will be no
+b:match_infercase option unless someone requests it.)
+
+ *b:match_debug*
+Define b:match_debug if you want debugging information to be saved. See
+|matchit-debug|, below.
+
+ *b:match_skip*
+If b:match_skip is defined, it is passed as the skip argument to
+|searchpair()|. This controls when matching structures are skipped, or
+ignored. By default, they are ignored inside comments and strings, as
+determined by the |syntax| mechanism. (If syntax highlighting is turned off,
+nothing is skipped.) You can set b:match_skip to a string, which evaluates to
+a non-zero, numerical value if the match is to be skipped or zero if the match
+should not be skipped. In addition, the following special values are
+supported by matchit.vim:
+ s:foo becomes (current syntax item) =~ foo
+ S:foo becomes (current syntax item) !~ foo
+ r:foo becomes (line before cursor) =~ foo
+ R:foo becomes (line before cursor) !~ foo
+(The "s" is meant to suggest "syntax", and the "r" is meant to suggest
+"regular expression".)
+
+Examples:
+
+ You can get the default behavior with >
+ :let b:match_skip = 's:comment\|string'
+<
+ If you want to skip matching structures unless they are at the start
+ of the line (ignoring whitespace) then you can >
+ :let b:match_skip = 'R:^\s*'
+< Do not do this if strings or comments can span several lines, since
+ the normal syntax checking will not be done if you set b:match_skip.
+
+ In LaTeX, since "%" is used as the comment character, you can >
+ :let b:match_skip = 'r:%'
+< Unfortunately, this will skip anything after "\%", an escaped "%". To
+ allow for this, and also "\\%" (an excaped backslash followed by the
+ comment character) you can >
+ :let b:match_skip = 'r:\(^\|[^\\]\)\(\\\\\)*%'
+<
+ See the $VIMRUNTIME/ftplugin/vim.vim for an example that uses both
+ syntax and a regular expression.
+
+==============================================================================
+4. Supporting a New Language *matchit-newlang*
+ *b:match_words*
+In order for matchit.vim to support a new language, you must define a suitable
+pattern for |b:match_words|. You may also want to set some of the
+|matchit-configure| variables, as described above. If your language has a
+complicated syntax, or many keywords, you will need to know something about
+Vim's |regular-expression|s.
+
+The format for |b:match_words| is similar to that of the 'matchpairs' option:
+it is a comma (,)-separated list of groups; each group is a colon(:)-separated
+list of patterns (regular expressions). Commas and backslashes that are part
+of a pattern should be escaped with backslashes ('\:' and '\,'). It is OK to
+have only one group; the effect is undefined if a group has only one pattern.
+A simple example is >
+ :let b:match_words = '\<if\>:\<endif\>,'
+ \ . '\<while\>:\<continue\>:\<break\>:\<endwhile\>'
+(In Vim regular expressions, |\<| and |\>| denote word boundaries. Thus "if"
+matches the end of "endif" but "\<if\>" does not.) Then banging on the "%"
+key will bounce the cursor between "if" and the matching "endif"; and from
+"while" to any matching "continue" or "break", then to the matching "endwhile"
+and back to the "while". It is almost always easier to use |literal-string|s
+(single quotes) as above: '\<if\>' rather than "\\<if\\>" and so on.
+
+Exception: If the ":" character does not appear in b:match_words, then it is
+treated as an expression to be evaluated. For example, >
+ :let b:match_words = 'GetMatchWords()'
+allows you to define a function. This can return a different string depending
+on the current syntax, for example.
+
+Once you have defined the appropriate value of |b:match_words|, you will
+probably want to have this set automatically each time you edit the
+appropriate file type. The recommended way to do this is by adding the
+definition to a |filetype-plugin| file.
+
+Tips: Be careful that your initial pattern does not match your final pattern.
+See the example above for the use of word-boundary expressions. It is usually
+better to use ".\{-}" (as many as necessary) instead of ".*" (as many as
+possible). See |\{-|. For example, in the string "<tag>label</tag>", "<.*>"
+matches the whole string whereas "<.\{-}>" and "<[^>]*>" match "<tag>" and
+"</tag>".
+
+ *matchit-spaces* *matchit-s:notend*
+If "if" is to be paired with "end if" (Note the space!) then word boundaries
+are not enough. Instead, define a regular expression s:notend that will match
+anything but "end" and use it as follows: >
+ :let s:notend = '\%(\<end\s\+\)\@<!'
+ :let b:match_words = s:notend . '\<if\>:\<end\s\+if\>'
+< *matchit-s:sol*
+This is a simplified version of what is done for Ada. The s:notend is a
+|script-variable|. Similarly, you may want to define a start-of-line regular
+expression >
+ :let s:sol = '\%(^\|;\)\s*'
+if keywords are only recognized after the start of a line or after a
+semicolon (;), with optional white space.
+
+ *matchit-backref* *matchit-\1*
+In any group, the expressions |\1|, |\2|, ..., |\9| refer to parts of the
+INITIAL pattern enclosed in |\(|escaped parentheses|\)|. These are referred
+to as back references, or backrefs. For example, >
+ :let b:match_words = '\<b\(o\+\)\>:\(h\)\1\>'
+means that "bo" pairs with "ho" and "boo" pairs with "hoo" and so on. Note
+that "\1" does not refer to the "\(h\)" in this example. If you have
+"\(nested \(parentheses\)\) then "\d" refers to the d-th "\(" and everything
+up to and including the matching "\)": in "\(nested\(parentheses\)\)", "\1"
+refers to everything and "\2" refers to "\(parentheses\)". If you use a
+variable such as |s:notend| or |s:sol| in the previous paragraph then remember
+to count any "\(" patterns in this variable. You do not have to count groups
+defined by |\%(\)|.
+
+It should be possible to resolve back references from any pattern in the
+group. For example, >
+ :let b:match_words = '\(foo\)\(bar\):more\1:and\2:end\1\2'
+would not work because "\2" cannot be determined from "morefoo" and "\1"
+cannot be determined from "andbar". On the other hand, >
+ :let b:match_words = '\(\(foo\)\(bar\)\):\3\2:end\1'
+should work (and have the same effect as "foobar:barfoo:endfoobar"), although
+this has not been thoroughly tested.
+
+You can use |zero-width| patterns such as |\@<=| and |\zs|. (The latter has
+not been thouroughly tested in matchit.vim.) For example, if the keyword "if"
+must occur at the start of the line, with optional white space, you might use
+the pattern "\(^\s*\)\@<=if" so that the cursor will end on the "i" instead of
+at the start of the line. For another example, if HTML had only one tag then
+one could >
+ :let b:match_words = '<:>,<\@<=tag>:<\@<=/tag>'
+so that "%" can bounce between matching "<" and ">" pairs or (starting on
+"tag" or "/tag") between matching tags. Without the |\@<=|, the script would
+bounce from "tag" to the "<" in "</tag>", and another "%" would not take you
+back to where you started.
+
+DEBUGGING *matchit-debug* *:MatchDebug*
+
+If you are having trouble figuring out the appropriate definition of
+|b:match_words| then you can take advantage of the same information I use when
+debugging the script. This is especially true if you are not sure whether
+your patterns or my script are at fault! To make this more convenient, I have
+made the command :MatchDebug, which defines the variable |b:match_debug| and
+creates a Matchit menu. This menu makes it convenient to check the values of
+the variables described below. You will probably also want to read
+|matchit-details| above.
+
+Defining the variable |b:match_debug| causes the script to set the following
+variables, each time you hit the "%" key. Several of these are only defined
+if |b:match_words| includes |backref|s.
+
+ *b:match_pat*
+The b:match_pat variable is set to |b:match_words| with |backref|s parsed.
+ *b:match_match*
+The b:match_match variable is set to the bit of text that is recognized as a
+match.
+ *b:match_col*
+The b:match_col variable is set to the cursor column of the start of the
+matching text.
+ *b:match_wholeBR*
+The b:match_wholeBR variable is set to the comma-separated group of patterns
+that matches, with |backref|s unparsed.
+ *b:match_iniBR*
+The b:match_iniBR variable is set to the first pattern in |b:match_wholeBR|.
+ *b:match_ini*
+The b:match_ini variable is set to the first pattern in |b:match_wholeBR|,
+with |backref|s resolved from |b:match_match|.
+ *b:match_tail*
+The b:match_tail variable is set to the remaining patterns in
+|b:match_wholeBR|, with |backref|s resolved from |b:match_match|.
+ *b:match_word*
+The b:match_word variable is set to the pattern from |b:match_wholeBR| that
+matches |b:match_match|.
+ *b:match_table*
+The back reference '\'.d refers to the same thing as '\'.b:match_table[d] in
+|b:match_word|.
+
+==============================================================================
+5. Known Bugs and Limitations *matchit-bugs*
+
+Just because I know about a bug does not mean that it is on my todo list. I
+try to respond to reports of bugs that cause real problems. If it does not
+cause serious problems, or if there is a work-around, a bug may sit there for
+a while. Moral: if a bug (known or not) bothers you, let me know.
+
+The various |:vmap|s defined in the script (%, |g%|, |[%|, |]%|, |a%|) may
+have undesired effects in Select mode |Select-mode-mapping|. At least, if you
+want to replace the selection with any character in "ag%[]" there will be a
+pause of |'updatetime'| first.
+
+It would be nice if "\0" were recognized as the entire pattern. That is, it
+would be nice if "foo:\end\0" had the same effect as "\(foo\):\end\1". I may
+try to implement this in a future version. (This is not so easy to arrange as
+you might think!)
+
+==============================================================================
+vim:tw=78:fo=tcq2:
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812 plugin/matchit.vim
@@ -0,0 +1,812 @@
+" matchit.vim: (global plugin) Extended "%" matching
+" Last Change: Fri Jan 25 10:00 AM 2008 EST
+" Maintainer: Benji Fisher PhD <benji@member.AMS.org>
+" Version: 1.13.2, for Vim 6.3+
+" URL: http://www.vim.org/script.php?script_id=39
+
+" Documentation:
+" The documentation is in a separate file, matchit.txt .
+
+" Credits:
+" Vim editor by Bram Moolenaar (Thanks, Bram!)
+" Original script and design by Raul Segura Acevedo
+" Support for comments by Douglas Potts
+" Support for back references and other improvements by Benji Fisher
+" Support for many languages by Johannes Zellner
+" Suggestions for improvement, bug reports, and support for additional
+" languages by Jordi-Albert Batalla, Neil Bird, Servatius Brandt, Mark
+" Collett, Stephen Wall, Dany St-Amant, Yuheng Xie, and Johannes Zellner.
+
+" Debugging:
+" If you'd like to try the built-in debugging commands...
+" :MatchDebug to activate debugging for the current buffer
+" This saves the values of several key script variables as buffer-local
+" variables. See the MatchDebug() function, below, for details.
+
+" TODO: I should think about multi-line patterns for b:match_words.
+" This would require an option: how many lines to scan (default 1).
+" This would be useful for Python, maybe also for *ML.
+" TODO: Maybe I should add a menu so that people will actually use some of
+" the features that I have implemented.
+" TODO: Eliminate the MultiMatch function. Add yet another argument to
+" Match_wrapper() instead.
+" TODO: Allow :let b:match_words = '\(\(foo\)\(bar\)\):\3\2:end\1'
+" TODO: Make backrefs safer by using '\V' (very no-magic).
+" TODO: Add a level of indirection, so that custom % scripts can use my
+" work but extend it.
+
+" allow user to prevent loading
+" and prevent duplicate loading
+if exists("loaded_matchit") || &cp
+ finish
+endif
+let loaded_matchit = 1
+let s:last_mps = ""
+let s:last_words = ":"
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+nnoremap <silent> % :<C-U>call <SID>Match_wrapper('',1,'n') <CR>
+nnoremap <silent> g% :<C-U>call <SID>Match_wrapper('',0,'n') <CR>
+vnoremap <silent> % :<C-U>call <SID>Match_wrapper('',1,'v') <CR>m'gv``
+vnoremap <silent> g% :<C-U>call <SID>Match_wrapper('',0,'v') <CR>m'gv``
+onoremap <silent> % v:<C-U>call <SID>Match_wrapper('',1,'o') <CR>
+onoremap <silent> g% v:<C-U>call <SID>Match_wrapper('',0,'o') <CR>
+
+" Analogues of [{ and ]} using matching patterns:
+nnoremap <silent> [% :<C-U>call <SID>MultiMatch("bW", "n") <CR>
+nnoremap <silent> ]% :<C-U>call <SID>MultiMatch("W", "n") <CR>
+vmap [% <Esc>[%m'gv``
+vmap ]% <Esc>]%m'gv``
+" vnoremap <silent> [% :<C-U>call <SID>MultiMatch("bW", "v") <CR>m'gv``
+" vnoremap <silent> ]% :<C-U>call <SID>MultiMatch("W", "v") <CR>m'gv``
+onoremap <silent> [% v:<C-U>call <SID>MultiMatch("bW", "o") <CR>
+onoremap <silent> ]% v:<C-U>call <SID>MultiMatch("W", "o") <CR>
+
+" text object:
+vmap a% <Esc>[%v]%
+
+" Auto-complete mappings: (not yet "ready for prime time")
+" TODO Read :help write-plugin for the "right" way to let the user
+" specify a key binding.
+" let g:match_auto = '<C-]>'
+" let g:match_autoCR = '<C-CR>'
+" if exists("g:match_auto")
+" execute "inoremap " . g:match_auto . ' x<Esc>"=<SID>Autocomplete()<CR>Pls'
+" endif
+" if exists("g:match_autoCR")
+" execute "inoremap " . g:match_autoCR . ' <CR><C-R>=<SID>Autocomplete()<CR>'
+" endif
+" if exists("g:match_gthhoh")
+" execute "inoremap " . g:match_gthhoh . ' <C-O>:call <SID>Gthhoh()<CR>'
+" endif " gthhoh = "Get the heck out of here!"
+
+let s:notslash = '\\\@<!\%(\\\\\)*'
+
+function! s:Match_wrapper(word, forward, mode) range
+ " In s:CleanUp(), :execute "set" restore_options .
+ let restore_options = (&ic ? " " : " no") . "ignorecase"
+ if exists("b:match_ignorecase")
+ let &ignorecase = b:match_ignorecase
+ endif
+ let restore_options = " ve=" . &ve . restore_options
+ set ve=
+ " If this function was called from Visual mode, make sure that the cursor
+ " is at the correct end of the Visual range:
+ if a:mode == "v"
+ execute "normal! gv\<Esc>"
+ endif
+ " In s:CleanUp(), we may need to check whether the cursor moved forward.
+ let startline = line(".")
+ let startcol = col(".")
+ " Use default behavior if called with a count.
+ if v:count
+ exe "normal! " . v:count . "%"
+ return s:CleanUp(restore_options, a:mode, startline, startcol)
+ end
+
+ " First step: if not already done, set the script variables
+ " s:do_BR flag for whether there are backrefs
+ " s:pat parsed version of b:match_words
+ " s:all regexp based on s:pat and the default groups
+ "
+ if !exists("b:match_words") || b:match_words == ""
+ let match_words = ""
+ " Allow b:match_words = "GetVimMatchWords()" .
+ elseif b:match_words =~ ":"
+ let match_words = b:match_words
+ else
+ execute "let match_words =" b:match_words
+ endif
+" Thanks to Preben "Peppe" Guldberg and Bram Moolenaar for this suggestion!
+ if (match_words != s:last_words) || (&mps != s:last_mps) ||
+ \ exists("b:match_debug")
+ let s:last_words = match_words
+ let s:last_mps = &mps
+ " The next several lines were here before
+ " BF started messing with this script.
+ " quote the special chars in 'matchpairs', replace [,:] with \| and then
+ " append the builtin pairs (/*, */, #if, #ifdef, #else, #elif, #endif)
+ " let default = substitute(escape(&mps, '[$^.*~\\/?]'), '[,:]\+',
+ " \ '\\|', 'g').'\|\/\*\|\*\/\|#if\>\|#ifdef\>\|#else\>\|#elif\>\|#endif\>'
+ let default = escape(&mps, '[$^.*~\\/?]') . (strlen(&mps) ? "," : "") .
+ \ '\/\*:\*\/,#if\%(def\)\=:#else\>:#elif\>:#endif\>'
+ " s:all = pattern with all the keywords
+ let match_words = match_words . (strlen(match_words) ? "," : "") . default
+ if match_words !~ s:notslash . '\\\d'
+ let s:do_BR = 0
+ let s:pat = match_words
+ else
+ let s:do_BR = 1
+ let s:pat = s:ParseWords(match_words)
+ endif
+ let s:all = substitute(s:pat, s:notslash . '\zs[,:]\+', '\\|', 'g')
+ let s:all = '\%(' . s:all . '\)'
+ " let s:all = '\%(' . substitute(s:all, '\\\ze[,:]', '', 'g') . '\)'
+ if exists("b:match_debug")
+ let b:match_pat = s:pat
+ endif
+ endif
+
+ " Second step: set the following local variables:
+ " matchline = line on which the cursor started
+ " curcol = number of characters before match
+ " prefix = regexp for start of line to start of match
+ " suffix = regexp for end of match to end of line
+ " Require match to end on or after the cursor and prefer it to
+ " start on or before the cursor.
+ let matchline = getline(startline)
+ if a:word != ''
+ " word given
+ if a:word !~ s:all
+ echohl WarningMsg|echo 'Missing rule for word:"'.a:word.'"'|echohl NONE
+ return s:CleanUp(restore_options, a:mode, startline, startcol)
+ endif
+ let matchline = a:word
+ let curcol = 0
+ let prefix = '^\%('
+ let suffix = '\)$'
+ " Now the case when "word" is not given
+ else " Find the match that ends on or after the cursor and set curcol.
+ let regexp = s:Wholematch(matchline, s:all, startcol-1)
+ let curcol = match(matchline, regexp)
+ " If there is no match, give up.
+ if curcol == -1
+ return s:CleanUp(restore_options, a:mode, startline, startcol)
+ endif
+ let endcol = matchend(matchline, regexp)
+ let suf = strlen(matchline) - endcol
+ let prefix = (curcol ? '^.*\%' . (curcol + 1) . 'c\%(' : '^\%(')
+ let suffix = (suf ? '\)\%' . (endcol + 1) . 'c.*$' : '\)$')
+ endif
+ if exists("b:match_debug")
+ let b:match_match = matchstr(matchline, regexp)
+ let b:match_col = curcol+1
+ endif
+
+ " Third step: Find the group and single word that match, and the original
+ " (backref) versions of these. Then, resolve the backrefs.
+ " Set the following local variable:
+ " group = colon-separated list of patterns, one of which matches
+ " = ini:mid:fin or ini:fin
+ "
+ " Reconstruct the version with unresolved backrefs.
+ let patBR = substitute(match_words.',',
+ \ s:notslash.'\zs[,:]*,[,:]*', ',', 'g')
+ let patBR = substitute(patBR, s:notslash.'\zs:\{2,}', ':', 'g')
+ " Now, set group and groupBR to the matching group: 'if:endif' or
+ " 'while:endwhile' or whatever. A bit of a kluge: s:Choose() returns
+ " group . "," . groupBR, and we pick it apart.
+ let group = s:Choose(s:pat, matchline, ",", ":", prefix, suffix, patBR)
+ let i = matchend(group, s:notslash . ",")
+ let groupBR = strpart(group, i)
+ let group = strpart(group, 0, i-1)
+ " Now, matchline =~ prefix . substitute(group,':','\|','g') . suffix
+ if s:do_BR " Do the hard part: resolve those backrefs!
+ let group = s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+ endif
+ if exists("b:match_debug")
+ let b:match_wholeBR = groupBR
+ let i = matchend(groupBR, s:notslash . ":")
+ let b:match_iniBR = strpart(groupBR, 0, i-1)
+ endif
+
+ " Fourth step: Set the arguments for searchpair().
+ let i = matchend(group, s:notslash . ":")
+ let j = matchend(group, '.*' . s:notslash . ":")
+ let ini = strpart(group, 0, i-1)
+ let mid = substitute(strpart(group, i,j-i-1), s:notslash.'\zs:', '\\|', 'g')
+ let fin = strpart(group, j)
+ "Un-escape the remaining , and : characters.
+ let ini = substitute(ini, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+ let mid = substitute(mid, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+ let fin = substitute(fin, s:notslash . '\zs\\\(:\|,\)', '\1', 'g')
+ " searchpair() requires that these patterns avoid \(\) groups.
+ let ini = substitute(ini, s:notslash . '\zs\\(', '\\%(', 'g')
+ let mid = substitute(mid, s:notslash . '\zs\\(', '\\%(', 'g')
+ let fin = substitute(fin, s:notslash . '\zs\\(', '\\%(', 'g')
+ " Set mid. This is optimized for readability, not micro-efficiency!
+ if a:forward && matchline =~ prefix . fin . suffix
+ \ || !a:forward && matchline =~ prefix . ini . suffix
+ let mid = ""
+ endif
+ " Set flag. This is optimized for readability, not micro-efficiency!
+ if a:forward && matchline =~ prefix . fin . suffix
+ \ || !a:forward && matchline !~ prefix . ini . suffix
+ let flag = "bW"
+ else
+ let flag = "W"
+ endif
+ " Set skip.
+ if exists("b:match_skip")
+ let skip = b:match_skip
+ elseif exists("b:match_comment") " backwards compatibility and testing!
+ let skip = "r:" . b:match_comment
+ else
+ let skip = 's:comment\|string'
+ endif
+ let skip = s:ParseSkip(skip)
+ if exists("b:match_debug")
+ let b:match_ini = ini
+ let b:match_tail = (strlen(mid) ? mid.'\|' : '') . fin
+ endif
+
+ " Fifth step: actually start moving the cursor and call searchpair().
+ " Later, :execute restore_cursor to get to the original screen.
+ let restore_cursor = virtcol(".") . "|"
+ normal! g0
+ let restore_cursor = line(".") . "G" . virtcol(".") . "|zs" . restore_cursor
+ normal! H
+ let restore_cursor = "normal!" . line(".") . "Gzt" . restore_cursor
+ execute restore_cursor
+ call cursor(0, curcol + 1)
+ " normal! 0
+ " if curcol
+ " execute "normal!" . curcol . "l"
+ " endif
+ if skip =~ 'synID' && !(has("syntax") && exists("g:syntax_on"))
+ let skip = "0"
+ else
+ execute "if " . skip . "| let skip = '0' | endif"
+ endif
+ let sp_return = searchpair(ini, mid, fin, flag, skip)
+ let final_position = "call cursor(" . line(".") . "," . col(".") . ")"
+ " Restore cursor position and original screen.
+ execute restore_cursor
+ normal! m'
+ if sp_return > 0
+ execute final_position
+ endif
+ return s:CleanUp(restore_options, a:mode, startline, startcol, mid.'\|'.fin)
+endfun
+
+" Restore options and do some special handling for Operator-pending mode.
+" The optional argument is the tail of the matching group.
+fun! s:CleanUp(options, mode, startline, startcol, ...)
+ execute "set" a:options
+ " Open folds, if appropriate.
+ if a:mode != "o"
+ if &foldopen =~ "percent"
+ normal! zv
+ endif
+ " In Operator-pending mode, we want to include the whole match
+ " (for example, d%).
+ " This is only a problem if we end up moving in the forward direction.
+ elseif (a:startline < line(".")) ||
+ \ (a:startline == line(".") && a:startcol < col("."))
+ if a:0
+ " Check whether the match is a single character. If not, move to the
+ " end of the match.
+ let matchline = getline(".")
+ let currcol = col(".")
+ let regexp = s:Wholematch(matchline, a:1, currcol-1)
+ let endcol = matchend(matchline, regexp)
+ if endcol > currcol " This is NOT off by one!
+ execute "normal!" . (endcol - currcol) . "l"
+ endif
+ endif " a:0
+ endif " a:mode != "o" && etc.
+ return 0
+endfun
+
+" Example (simplified HTML patterns): if
+" a:groupBR = '<\(\k\+\)>:</\1>'
+" a:prefix = '^.\{3}\('
+" a:group = '<\(\k\+\)>:</\(\k\+\)>'
+" a:suffix = '\).\{2}$'
+" a:matchline = "123<tag>12" or "123</tag>12"
+" then extract "tag" from a:matchline and return "<tag>:</tag>" .
+fun! s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+ if a:matchline !~ a:prefix .
+ \ substitute(a:group, s:notslash . '\zs:', '\\|', 'g') . a:suffix
+ return a:group
+ endif
+ let i = matchend(a:groupBR, s:notslash . ':')
+ let ini = strpart(a:groupBR, 0, i-1)
+ let tailBR = strpart(a:groupBR, i)
+ let word = s:Choose(a:group, a:matchline, ":", "", a:prefix, a:suffix,
+ \ a:groupBR)
+ let i = matchend(word, s:notslash . ":")
+ let wordBR = strpart(word, i)
+ let word = strpart(word, 0, i-1)
+ " Now, a:matchline =~ a:prefix . word . a:suffix
+ if wordBR != ini
+ let table = s:Resolve(ini, wordBR, "table")
+ else
+ " let table = "----------"
+ let table = ""
+ let d = 0
+ while d < 10
+ if tailBR =~ s:notslash . '\\' . d
+ " let table[d] = d
+ let table = table . d
+ else
+ let table = table . "-"
+ endif
+ let d = d + 1
+ endwhile
+ endif
+ let d = 9
+ while d
+ if table[d] != "-"
+ let backref = substitute(a:matchline, a:prefix.word.a:suffix,
+ \ '\'.table[d], "")
+ " Are there any other characters that should be escaped?
+ let backref = escape(backref, '*,:')
+ execute s:Ref(ini, d, "start", "len")
+ let ini = strpart(ini, 0, start) . backref . strpart(ini, start+len)
+ let tailBR = substitute(tailBR, s:notslash . '\zs\\' . d,
+ \ escape(backref, '\\'), 'g')
+ endif
+ let d = d-1
+ endwhile
+ if exists("b:match_debug")
+ if s:do_BR
+ let b:match_table = table
+ let b:match_word = word
+ else
+ let b:match_table = ""
+ let b:match_word = ""
+ endif
+ endif
+ return ini . ":" . tailBR
+endfun
+
+" Input a comma-separated list of groups with backrefs, such as
+" a:groups = '\(foo\):end\1,\(bar\):end\1'
+" and return a comma-separated list of groups with backrefs replaced:
+" return '\(foo\):end\(foo\),\(bar\):end\(bar\)'
+fun! s:ParseWords(groups)
+ let groups = substitute(a:groups.",", s:notslash.'\zs[,:]*,[,:]*', ',', 'g')
+ let groups = substitute(groups, s:notslash . '\zs:\{2,}', ':', 'g')
+ let parsed = ""
+ while groups =~ '[^,:]'
+ let i = matchend(groups, s:notslash . ':')
+ let j = matchend(groups, s:notslash . ',')
+ let ini = strpart(groups, 0, i-1)
+ let tail = strpart(groups, i, j-i-1) . ":"
+ let groups = strpart(groups, j)
+ let parsed = parsed . ini
+ let i = matchend(tail, s:notslash . ':')
+ while i != -1
+ " In 'if:else:endif', ini='if' and word='else' and then word='endif'.
+ let word = strpart(tail, 0, i-1)
+ let tail = strpart(tail, i)
+ let i = matchend(tail, s:notslash . ':')
+ let parsed = parsed . ":" . s:Resolve(ini, word, "word")
+ endwhile " Now, tail has been used up.
+ let parsed = parsed . ","
+ endwhile " groups =~ '[^,:]'
+ let parsed = substitute(parsed, ',$', '', '')
+ return parsed
+endfun
+
+" TODO I think this can be simplified and/or made more efficient.
+" TODO What should I do if a:start is out of range?
+" Return a regexp that matches all of a:string, such that
+" matchstr(a:string, regexp) represents the match for a:pat that starts
+" as close to a:start as possible, before being preferred to after, and
+" ends after a:start .
+" Usage:
+" let regexp = s:Wholematch(getline("."), 'foo\|bar', col(".")-1)
+" let i = match(getline("."), regexp)
+" let j = matchend(getline("."), regexp)
+" let match = matchstr(getline("."), regexp)
+fun! s:Wholematch(string, pat, start)
+ let group = '\%(' . a:pat . '\)'
+ let prefix = (a:start ? '\(^.*\%<' . (a:start + 2) . 'c\)\zs' : '^')
+ let len = strlen(a:string)
+ let suffix = (a:start+1 < len ? '\(\%>'.(a:start+1).'c.*$\)\@=' : '$')
+ if a:string !~ prefix . group . suffix
+ let prefix = ''
+ endif
+ return prefix . group . suffix
+endfun
+
+" No extra arguments: s:Ref(string, d) will
+" find the d'th occurrence of '\(' and return it, along with everything up
+" to and including the matching '\)'.
+" One argument: s:Ref(string, d, "start") returns the index of the start
+" of the d'th '\(' and any other argument returns the length of the group.
+" Two arguments: s:Ref(string, d, "foo", "bar") returns a string to be
+" executed, having the effect of
+" :let foo = s:Ref(string, d, "start")
+" :let bar = s:Ref(string, d, "len")
+fun! s:Ref(string, d, ...)
+ let len = strlen(a:string)
+ if a:d == 0
+ let start = 0
+ else
+ let cnt = a:d
+ let match = a:string
+ while cnt
+ let cnt = cnt - 1
+ let index = matchend(match, s:notslash . '\\(')
+ if index == -1
+ return ""
+ endif
+ let match = strpart(match, index)
+ endwhile
+ let start = len - strlen(match)
+ if a:0 == 1 && a:1 == "start"
+ return start - 2
+ endif
+ let cnt = 1
+ while cnt
+ let index = matchend(match, s:notslash . '\\(\|\\)') - 1
+ if index == -2
+ return ""
+ endif
+ " Increment if an open, decrement if a ')':
+ let cnt = cnt + (match[index]=="(" ? 1 : -1) " ')'
+ " let cnt = stridx('0(', match[index]) + cnt
+ let match = strpart(match, index+1)
+ endwhile
+ let start = start - 2
+ let len = len - start - strlen(match)
+ endif
+ if a:0 == 1
+ return len
+ elseif a:0 == 2
+ return "let " . a:1 . "=" . start . "| let " . a:2 . "=" . len
+ else
+ return strpart(a:string, start, len)
+ endif
+endfun
+
+" Count the number of disjoint copies of pattern in string.
+" If the pattern is a literal string and contains no '0' or '1' characters
+" then s:Count(string, pattern, '0', '1') should be faster than
+" s:Count(string, pattern).
+fun! s:Count(string, pattern, ...)
+ let pat = escape(a:pattern, '\\')
+ if a:0 > 1
+ let foo = substitute(a:string, '[^'.a:pattern.']', "a:1", "g")
+ let foo = substitute(a:string, pat, a:2, "g")
+ let foo = substitute(foo, '[^' . a:2 . ']', "", "g")
+ return strlen(foo)
+ endif
+ let result = 0
+ let foo = a:string
+ let index = matchend(foo, pat)
+ while index != -1
+ let result = result + 1
+ let foo = strpart(foo, index)
+ let index = matchend(foo, pat)
+ endwhile
+ return result
+endfun
+
+" s:Resolve('\(a\)\(b\)', '\(c\)\2\1\1\2') should return table.word, where
+" word = '\(c\)\(b\)\(a\)\3\2' and table = '-32-------'. That is, the first
+" '\1' in target is replaced by '\(a\)' in word, table[1] = 3, and this
+" indicates that all other instances of '\1' in target are to be replaced
+" by '\3'. The hard part is dealing with nesting...
+" Note that ":" is an illegal character for source and target,
+" unless it is preceded by "\".
+fun! s:Resolve(source, target, output)
+ let word = a:target
+ let i = matchend(word, s:notslash . '\\\d') - 1
+ let table = "----------"
+ while i != -2 " There are back references to be replaced.
+ let d = word[i]
+ let backref = s:Ref(a:source, d)
+ " The idea is to replace '\d' with backref. Before we do this,
+ " replace any \(\) groups in backref with :1, :2, ... if they
+ " correspond to the first, second, ... group already inserted
+ " into backref. Later, replace :1 with \1 and so on. The group
+ " number w+b within backref corresponds to the group number
+ " s within a:source.
+ " w = number of '\(' in word before the current one
+ let w = s:Count(
+ \ substitute(strpart(word, 0, i-1), '\\\\', '', 'g'), '\(', '1')
+ let b = 1 " number of the current '\(' in backref
+ let s = d " number of the current '\(' in a:source
+ while b <= s:Count(substitute(backref, '\\\\', '', 'g'), '\(', '1')
+ \ && s < 10
+ if table[s] == "-"
+ if w + b < 10
+ " let table[s] = w + b
+ let table = strpart(table, 0, s) . (w+b) . strpart(table, s+1)
+ endif
+ let b = b + 1
+ let s = s + 1
+ else
+ execute s:Ref(backref, b, "start", "len")
+ let ref = strpart(backref, start, len)
+ let backref = strpart(backref, 0, start) . ":". table[s]
+ \ . strpart(backref, start+len)
+ let s = s + s:Count(substitute(ref, '\\\\', '', 'g'), '\(', '1')
+ endif
+ endwhile
+ let word = strpart(word, 0, i-1) . backref . strpart(word, i+1)
+ let i = matchend(word, s:notslash . '\\\d') - 1
+ endwhile
+ let word = substitute(word, s:notslash . '\zs:', '\\', 'g')
+ if a:output == "table"
+ return table
+ elseif a:output == "word"
+ return word
+ else
+ return table . word
+ endif
+endfun
+
+" Assume a:comma = ",". Then the format for a:patterns and a:1 is
+" a:patterns = "<pat1>,<pat2>,..."
+" a:1 = "<alt1>,<alt2>,..."
+" If <patn> is the first pattern that matches a:string then return <patn>
+" if no optional arguments are given; return <patn>,<altn> if a:1 is given.
+fun! s:Choose(patterns, string, comma, branch, prefix, suffix, ...)
+ let tail = (a:patterns =~ a:comma."$" ? a:patterns : a:patterns . a:comma)
+ let i = matchend(tail, s:notslash . a:comma)
+ if a:0
+ let alttail = (a:1 =~ a:comma."$" ? a:1 : a:1 . a:comma)
+ let j = matchend(alttail, s:notslash . a:comma)
+ endif
+ let current = strpart(tail, 0, i-1)
+ if a:branch == ""
+ let currpat = current
+ else
+ let currpat = substitute(current, s:notslash . a:branch, '\\|', 'g')
+ endif
+ while a:string !~ a:prefix . currpat . a:suffix
+ let tail = strpart(tail, i)
+ let i = matchend(tail, s:notslash . a:comma)
+ if i == -1
+ return -1
+ endif
+ let current = strpart(tail, 0, i-1)
+ if a:branch == ""
+ let currpat = current
+ else
+ let currpat = substitute(current, s:notslash . a:branch, '\\|', 'g')
+ endif
+ if a:0
+ let alttail = strpart(alttail, j)
+ let j = matchend(alttail, s:notslash . a:comma)
+ endif
+ endwhile
+ if a:0
+ let current = current . a:comma . strpart(alttail, 0, j-1)
+ endif
+ return current
+endfun
+
+" Call this function to turn on debugging information. Every time the main
+" script is run, buffer variables will be saved. These can be used directly
+" or viewed using the menu items below.
+if !exists(":MatchDebug")
+ command! -nargs=0 MatchDebug call s:Match_debug()
+endif
+
+fun! s:Match_debug()
+ let b:match_debug = 1 " Save debugging information.
+ " pat = all of b:match_words with backrefs parsed
+ amenu &Matchit.&pat :echo b:match_pat<CR>
+ " match = bit of text that is recognized as a match
+ amenu &Matchit.&match :echo b:match_match<CR>
+ " curcol = cursor column of the start of the matching text
+ amenu &Matchit.&curcol :echo b:match_col<CR>
+ " wholeBR = matching group, original version
+ amenu &Matchit.wh&oleBR :echo b:match_wholeBR<CR>
+ " iniBR = 'if' piece, original version
+ amenu &Matchit.ini&BR :echo b:match_iniBR<CR>
+ " ini = 'if' piece, with all backrefs resolved from match
+ amenu &Matchit.&ini :echo b:match_ini<CR>
+ " tail = 'else\|endif' piece, with all backrefs resolved from match
+ amenu &Matchit.&tail :echo b:match_tail<CR>
+ " fin = 'endif' piece, with all backrefs resolved from match
+ amenu &Matchit.&word :echo b:match_word<CR>
+ " '\'.d in ini refers to the same thing as '\'.table[d] in word.
+ amenu &Matchit.t&able :echo '0:' . b:match_table . ':9'<CR>
+endfun
+
+" Jump to the nearest unmatched "(" or "if" or "<tag>" if a:spflag == "bW"
+" or the nearest unmatched "</tag>" or "endif" or ")" if a:spflag == "W".
+" Return a "mark" for the original position, so that
+" let m = MultiMatch("bW", "n") ... execute m
+" will return to the original position. If there is a problem, do not
+" move the cursor and return "", unless a count is given, in which case
+" go up or down as many levels as possible and again return "".
+" TODO This relies on the same patterns as % matching. It might be a good
+" idea to give it its own matching patterns.
+fun! s:MultiMatch(spflag, mode)
+ if !exists("b:match_words") || b:match_words == ""
+ return ""
+ end
+ let restore_options = (&ic ? "" : "no") . "ignorecase"
+ if exists("b:match_ignorecase")
+ let &ignorecase = b:match_ignorecase
+ endif
+ let startline = line(".")
+ let startcol = col(".")
+
+ " First step: if not already done, set the script variables
+ " s:do_BR flag for whether there are backrefs
+ " s:pat parsed version of b:match_words
+ " s:all regexp based on s:pat and the default groups
+ " This part is copied and slightly modified from s:Match_wrapper().
+ let default = escape(&mps, '[$^.*~\\/?]') . (strlen(&mps) ? "," : "") .
+ \ '\/\*:\*\/,#if\%(def\)\=:#else\>:#elif\>:#endif\>'
+ " Allow b:match_words = "GetVimMatchWords()" .
+ if b:match_words =~ ":"
+ let match_words = b:match_words
+ else
+ execute "let match_words =" b:match_words
+ endif
+ if (match_words != s:last_words) || (&mps != s:last_mps) ||
+ \ exists("b:match_debug")
+ let s:last_words = match_words
+ let s:last_mps = &mps
+ if match_words !~ s:notslash . '\\\d'
+ let s:do_BR = 0
+ let s:pat = match_words
+ else
+ let s:do_BR = 1
+ let s:pat = s:ParseWords(match_words)
+ endif
+ let s:all = '\%(' . substitute(s:pat . (strlen(s:pat)?",":"") . default,
+ \ '[,:]\+','\\|','g') . '\)'
+ if exists("b:match_debug")
+ let b:match_pat = s:pat
+ endif
+ endif
+
+ " Second step: figure out the patterns for searchpair()
+ " and save the screen, cursor position, and 'ignorecase'.
+ " - TODO: A lot of this is copied from s:Match_wrapper().
+ " - maybe even more functionality should be split off
+ " - into separate functions!
+ let cdefault = (s:pat =~ '[^,]$' ? "," : "") . default
+ let open = substitute(s:pat . cdefault,
+ \ s:notslash . '\zs:.\{-}' . s:notslash . ',', '\\),\\(', 'g')
+ let open = '\(' . substitute(open, s:notslash . '\zs:.*$', '\\)', '')
+ let close = substitute(s:pat . cdefault,
+ \ s:notslash . '\zs,.\{-}' . s:notslash . ':', '\\),\\(', 'g')
+ let close = substitute(close, '^.\{-}' . s:notslash . ':', '\\(', '') . '\)'
+ if exists("b:match_skip")
+ let skip = b:match_skip
+ elseif exists("b:match_comment") " backwards compatibility and testing!
+ let skip = "r:" . b:match_comment
+ else
+ let skip = 's:comment\|string'
+ endif
+ let skip = s:ParseSkip(skip)
+ " let restore_cursor = line(".") . "G" . virtcol(".") . "|"
+ " normal! H
+ " let restore_cursor = "normal!" . line(".") . "Gzt" . restore_cursor
+ let restore_cursor = virtcol(".") . "|"
+ normal! g0
+ let restore_cursor = line(".") . "G" . virtcol(".") . "|zs" . restore_cursor
+ normal! H
+ let restore_cursor = "normal!" . line(".") . "Gzt" . restore_cursor
+ execute restore_cursor
+
+ " Third step: call searchpair().
+ " Replace '\('--but not '\\('--with '\%(' and ',' with '\|'.
+ let openpat = substitute(open, '\(\\\@<!\(\\\\\)*\)\@<=\\(', '\\%(', 'g')
+ let openpat = substitute(openpat, ',', '\\|', 'g')
+ let closepat = substitute(close, '\(\\\@<!\(\\\\\)*\)\@<=\\(', '\\%(', 'g')
+ let closepat = substitute(closepat, ',', '\\|', 'g')
+ if skip =~ 'synID' && !(has("syntax") && exists("g:syntax_on"))
+ let skip = '0'
+ else
+ execute "if " . skip . "| let skip = '0' | endif"
+ endif
+ mark '
+ let level = v:count1
+ while level
+ if searchpair(openpat, '', closepat, a:spflag, skip) < 1
+ call s:CleanUp(restore_options, a:mode, startline, startcol)
+ return ""
+ endif
+ let level = level - 1
+ endwhile
+
+ " Restore options and return a string to restore the original position.
+ call s:CleanUp(restore_options, a:mode, startline, startcol)
+ return restore_cursor
+endfun
+
+" Search backwards for "if" or "while" or "<tag>" or ...
+" and return "endif" or "endwhile" or "</tag>" or ... .
+" For now, this uses b:match_words and the same script variables
+" as s:Match_wrapper() . Later, it may get its own patterns,
+" either from a buffer variable or passed as arguments.
+" fun! s:Autocomplete()
+" echo "autocomplete not yet implemented :-("
+" if !exists("b:match_words") || b:match_words == ""
+" return ""
+" end
+" let startpos = s:MultiMatch("bW")
+"
+" if startpos == ""
+" return ""
+" endif
+" " - TODO: figure out whether 'if' or '<tag>' matched, and construct
+" " - the appropriate closing.
+" let matchline = getline(".")
+" let curcol = col(".") - 1
+" " - TODO: Change the s:all argument if there is a new set of match pats.
+" let regexp = s:Wholematch(matchline, s:all, curcol)
+" let suf = strlen(matchline) - matchend(matchline, regexp)
+" let prefix = (curcol ? '^.\{' . curcol . '}\%(' : '^\%(')
+" let suffix = (suf ? '\).\{' . suf . '}$' : '\)$')
+" " Reconstruct the version with unresolved backrefs.
+" let patBR = substitute(b:match_words.',', '[,:]*,[,:]*', ',', 'g')
+" let patBR = substitute(patBR, ':\{2,}', ':', "g")
+" " Now, set group and groupBR to the matching group: 'if:endif' or
+" " 'while:endwhile' or whatever.
+" let group = s:Choose(s:pat, matchline, ",", ":", prefix, suffix, patBR)
+" let i = matchend(group, s:notslash . ",")
+" let groupBR = strpart(group, i)
+" let group = strpart(group, 0, i-1)
+" " Now, matchline =~ prefix . substitute(group,':','\|','g') . suffix
+" if s:do_BR
+" let group = s:InsertRefs(groupBR, prefix, group, suffix, matchline)
+" endif
+" " let g:group = group
+"
+" " - TODO: Construct the closing from group.
+" let fake = "end" . expand("<cword>")
+" execute startpos
+" return fake
+" endfun
+
+" Close all open structures. "Get the heck out of here!"
+" fun! s:Gthhoh()
+" let close = s:Autocomplete()
+" while strlen(close)
+" put=close
+" let close = s:Autocomplete()
+" endwhile
+" endfun
+
+" Parse special strings as typical skip arguments for searchpair():
+" s:foo becomes (current syntax item) =~ foo
+" S:foo becomes (current syntax item) !~ foo
+" r:foo becomes (line before cursor) =~ foo
+" R:foo becomes (line before cursor) !~ foo
+fun! s:ParseSkip(str)
+ let skip = a:str
+ if skip[1] == ":"
+ if skip[0] == "s"
+ let skip = "synIDattr(synID(line('.'),col('.'),1),'name') =~? '" .
+ \ strpart(skip,2) . "'"
+ elseif skip[0] == "S"
+ let skip = "synIDattr(synID(line('.'),col('.'),1),'name') !~? '" .
+ \ strpart(skip,2) . "'"
+ elseif skip[0] == "r"
+ let skip = "strpart(getline('.'),0,col('.'))=~'" . strpart(skip,2). "'"
+ elseif skip[0] == "R"
+ let skip = "strpart(getline('.'),0,col('.'))!~'" . strpart(skip,2). "'"
+ endif
+ endif
+ return skip
+endfun
+
+let &cpo = s:save_cpo
+
+" vim:sts=2:sw=2:
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