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							| @ -0,0 +1,211 @@ | ||||
| *surround.txt*  Plugin for deleting, changing, and adding "surroundings" | ||||
|  | ||||
| Author:  Tim Pope <http://tpo.pe/> | ||||
| License: Same terms as Vim itself (see |license|) | ||||
|  | ||||
| This plugin is only available if 'compatible' is not set. | ||||
|  | ||||
| INTRODUCTION                                    *surround* | ||||
|  | ||||
| This plugin is a tool for dealing with pairs of "surroundings."  Examples | ||||
| of surroundings include parentheses, quotes, and HTML tags.  They are | ||||
| closely related to what Vim refers to as |text-objects|.  Provided | ||||
| are mappings to allow for removing, changing, and adding surroundings. | ||||
|  | ||||
| Details follow on the exact semantics, but first, consider the following | ||||
| examples.  An asterisk (*) is used to denote the cursor position. | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|   "Hello *world!"           ds"         Hello world! | ||||
|   [123+4*56]/2              cs])        (123+456)/2 | ||||
|   "Look ma, I'm *HTML!"     cs"<q>      <q>Look ma, I'm HTML!</q> | ||||
|   if *x>3 {                 ysW(        if ( x>3 ) { | ||||
|   my $str = *whee!;         vllllS'     my $str = 'whee!'; | ||||
|  | ||||
| While a few features of this plugin will work in older versions of Vim, | ||||
| Vim 7 is recommended for full functionality. | ||||
|  | ||||
| MAPPINGS                                        *surround-mappings* | ||||
|  | ||||
| Delete surroundings is *ds* .  The next character given determines the target | ||||
| to delete.  The exact nature of the target is explained in |surround-targets| | ||||
| but essentially it is the last character of a |text-object|.  This mapping | ||||
| deletes the difference between the "i"nner object and "a"n object.  This is | ||||
| easiest to understand with some examples: | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|   "Hello *world!"           ds"         Hello world! | ||||
|   (123+4*56)/2              ds)         123+456/2 | ||||
|   <div>Yo!*</div>           dst         Yo! | ||||
|  | ||||
| Change surroundings is *cs* .  It takes two arguments, a target like with | ||||
| |ds|, and a replacement.  Details about the second argument can be found | ||||
| below in |surround-replacements|.  Once again, examples are in order. | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|   "Hello *world!"           cs"'        'Hello world!' | ||||
|   "Hello *world!"           cs"<q>      <q>Hello world!</q> | ||||
|   (123+4*56)/2              cs)]        [123+456]/2 | ||||
|   (123+4*56)/2              cs)[        [ 123+456 ]/2 | ||||
|   <div>Yo!*</div>           cst<p>      <p>Yo!</p> | ||||
|  | ||||
| *ys* takes a valid Vim motion or text object as the first object, and wraps | ||||
| it using the second argument as with |cs|.  (It's a stretch, but a good | ||||
| mnemonic for "ys" is "you surround".) | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|   Hello w*orld!             ysiw)       Hello (world)! | ||||
|  | ||||
| As a special case, *yss* operates on the current line, ignoring leading | ||||
| whitespace. | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|       Hello w*orld!         yssB            {Hello world!} | ||||
|  | ||||
| There is also *yS* and *ySS* which indent the surrounded text and place it | ||||
| on a line of its own. | ||||
|  | ||||
| In visual mode, a simple "S" with an argument wraps the selection.  This is | ||||
| referred to as the *vS* mapping, although ordinarily there will be | ||||
| additional keystrokes between the v and S.  In linewise visual mode, the | ||||
| surroundings are placed on separate lines and indented.  In blockwise visual | ||||
| mode, each line is surrounded. | ||||
|  | ||||
| A "gS" in visual mode, known as *vgS* , behaves similarly.  In linewise visual | ||||
| mode, the automatic indenting is suppressed.  In blockwise visual mode, this | ||||
| enables surrounding past the end of the line with 'virtualedit' set (there | ||||
| seems to be no way in Vim Script to differentiate between a jagged end of line | ||||
| selection and a virtual block selected past the end of the line, so two maps | ||||
| were needed). | ||||
|  | ||||
|                                                 *i_CTRL-G_s* *i_CTRL-G_S* | ||||
| Finally, there is an experimental insert mode mapping on <C-G>s and <C-S>. | ||||
| Beware that the latter won't work on terminals with flow control (if you | ||||
| accidentally freeze your terminal, use <C-Q> to unfreeze it).  The mapping | ||||
| inserts the specified surroundings and puts the cursor between them.  If, | ||||
| immediately after the mapping and before the replacement, a second <C-S> or | ||||
| carriage return is pressed, the prefix, cursor, and suffix will be placed on | ||||
| three separate lines.  <C-G>S (not <C-G>s) also exhibits this behavior. | ||||
|  | ||||
| TARGETS                                         *surround-targets* | ||||
|  | ||||
| The |ds| and |cs| commands both take a target as their first argument.  The | ||||
| possible targets are based closely on the |text-objects| provided by Vim. | ||||
| All targets are currently just one character. | ||||
|  | ||||
| Eight punctuation marks, (, ), {, }, [, ], <, and >, represent themselves | ||||
| and their counterparts.  If the opening mark is used, contained whitespace is | ||||
| also trimmed.  The targets b, B, r, and a are aliases for ), }, ], and >  | ||||
| (the first two mirror Vim; the second two are completely arbitrary and | ||||
| subject to change). | ||||
|  | ||||
| Three quote marks, ', ", `, represent themselves, in pairs.  They are only | ||||
| searched for on the current line. | ||||
|  | ||||
| A t is a pair of HTML or XML tags.  See |tag-blocks| for details.  Remember | ||||
| that you can specify a numerical argument if you want to get to a tag other | ||||
| than the innermost one. | ||||
|  | ||||
| The letters w, W, and s correspond to a |word|, a |WORD|, and a |sentence|, | ||||
| respectively.  These are special in that they have nothing to delete, and | ||||
| used with |ds| they are a no-op.  With |cs|, one could consider them a | ||||
| slight shortcut for ysi (cswb == ysiwb, more or less). | ||||
|  | ||||
| A p represents a |paragraph|.  This behaves similarly to w, W, and s above; | ||||
| however, newlines are sometimes added and/or removed. | ||||
|  | ||||
| REPLACEMENTS                                    *surround-replacements* | ||||
|  | ||||
| A replacement argument is a single character, and is required by |cs|, |ys|, | ||||
| and |vS|.  Undefined replacement characters (with the exception of alphabetic | ||||
| characters) default to placing themselves at the beginning and end of the | ||||
| destination, which can be useful for characters like / and |. | ||||
|  | ||||
| If either ), }, ], or > is used, the text is wrapped in the appropriate pair | ||||
| of characters.  Similar behavior can be found with (, {, and [ (but not <), | ||||
| which append an additional space to the inside.  Like with the targets above, | ||||
| b, B, r, and a are aliases for ), }, ], and >.  To fulfill the common need for | ||||
| code blocks in C-style languages, <C-}> (which is really <C-]>) adds braces on | ||||
| lines separate from the content. | ||||
|  | ||||
| If t or < is used, Vim prompts for an HTML/XML tag to insert.  You may specify | ||||
| attributes here and they will be stripped from the closing tag.  End your | ||||
| input by pressing <CR> or >.  If <C-T> is used, the tags will appear on lines | ||||
| by themselves. | ||||
|  | ||||
| A deprecated replacement of a LaTeX environment is provided on \ and l.  The | ||||
| name of the environment and any arguments will be input from a prompt.  This | ||||
| will be removed once a more fully functional customization system is | ||||
| implemented.  The following shows the resulting environment from | ||||
| csp\tabular}{lc<CR> | ||||
| > | ||||
|   \begin{tabular}{lc} | ||||
|   \end{tabular} | ||||
| < | ||||
| CUSTOMIZING                                     *surround-customizing* | ||||
|  | ||||
| The following adds a potential replacement on "-" (ASCII 45) in PHP files. | ||||
| (To determine the ASCII code to use, :echo char2nr("-")).  The carriage | ||||
| return will be replaced by the original text. | ||||
| > | ||||
|   autocmd FileType php let b:surround_45 = "<?php \r ?>" | ||||
| < | ||||
| This can be used in a PHP file as in the following example. | ||||
|  | ||||
|   Old text                  Command     New text ~ | ||||
|   print "Hello *world!"     yss-        <?php print "Hello world!" ?> | ||||
|  | ||||
| Additionally, one can use a global variable for globally available | ||||
| replacements. | ||||
| > | ||||
|   let g:surround_45 = "<% \r %>" | ||||
|   let g:surround_61 = "<%= \r %>" | ||||
| < | ||||
| Advanced, experimental, and subject to change:  One can also prompt for | ||||
| replacement text.  The syntax for this is to surround the replacement in pairs | ||||
| of low numbered control characters.  If this sounds confusing, that's because | ||||
| it is (but it makes the parsing easy).  Consider the following example for a | ||||
| LaTeX environment on the "l" replacement. | ||||
| > | ||||
|   let g:surround_108 = "\\begin{\1environment: \1}\r\\end{\1\1}" | ||||
| < | ||||
| When this replacement is used,  the user is prompted with an "environment: " | ||||
| prompt for input.  This input is inserted between each set of \1's. | ||||
| Additional inputs up to \7 can be used. | ||||
|  | ||||
| Furthermore, one can specify a regular expression substitution to apply. | ||||
| > | ||||
|   let g:surround_108 = "\\begin{\1environment: \1}\r\\end{\1\r}.*\r\1}" | ||||
| < | ||||
| This will remove anything after the first } in the input when the text is | ||||
| placed within the \end{} slot.  The first \r marks where the pattern begins, | ||||
| and the second where the replacement text begins. | ||||
|  | ||||
| Here's a second example for creating an HTML <div>.  The substitution cleverly | ||||
| prompts for an id, but only adds id="" if it is non-blank.  You may have to | ||||
| read this one a few times slowly before you understand it. | ||||
| > | ||||
|   let g:surround_{char2nr("d")} = "<div\1id: \r..*\r id=\"&\"\1>\r</div>" | ||||
| < | ||||
| Inputting text replacements is a proof of concept at this point. The ugly, | ||||
| unintuitive interface and the brevity of the documentation reflect this. | ||||
|  | ||||
| Finally, It is possible to always append a string to surroundings in insert | ||||
| mode (and only insert mode).  This is useful with certain plugins and mappings | ||||
| that allow you to jump to such markings. | ||||
| > | ||||
|   let g:surround_insert_tail = "<++>" | ||||
| < | ||||
| ISSUES                                          *surround-issues* | ||||
|  | ||||
| Vim could potentially get confused when deleting/changing occurs at the very | ||||
| end of the line.  Please report any repeatable instances of this. | ||||
|  | ||||
| Do we need to use |inputsave()|/|inputrestore()| with the tag replacement? | ||||
|  | ||||
| Indenting is handled haphazardly.  Need to decide the most appropriate | ||||
| behavior and implement it.  Right now one can do :let b:surround_indent = 1 | ||||
| (or the global equivalent) to enable automatic re-indenting by Vim via |=|; | ||||
| should this be the default? | ||||
|  | ||||
|  vim:tw=78:ts=8:ft=help:norl: | ||||
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