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diff --git a/runtime/doc/helphelp.txt b/runtime/doc/helphelp.txt new file mode 100644 index 0000000..f6c6ab7 --- /dev/null +++ b/runtime/doc/helphelp.txt @@ -0,0 +1,373 @@ +*helphelp.txt* For Vim version 8.1. Last change: 2017 Mar 19 + + + VIM REFERENCE MANUAL by Bram Moolenaar + + +Help on help files *helphelp* + +1. Help commands |online-help| +2. Translated help files |help-translated| +3. Writing help files |help-writing| + +============================================================================== +1. Help commands *online-help* + + *help* *<Help>* *:h* *:help* *<F1>* *i_<F1>* *i_<Help>* +<Help> or +:h[elp] Open a window and display the help file in read-only + mode. If there is a help window open already, use + that one. Otherwise, if the current window uses the + full width of the screen or is at least 80 characters + wide, the help window will appear just above the + current window. Otherwise the new window is put at + the very top. + The 'helplang' option is used to select a language, if + the main help file is available in several languages. + {not in Vi} + + *{subject}* *E149* *E661* +:h[elp] {subject} Like ":help", additionally jump to the tag {subject}. + For example: > + :help options + +< {subject} can include wildcards such as "*", "?" and + "[a-z]": + :help z? jump to help for any "z" command + :help z. jump to the help for "z." + But when a tag exists it is taken literally: + :help :? jump to help for ":?" + + If there is no full match for the pattern, or there + are several matches, the "best" match will be used. + A sophisticated algorithm is used to decide which + match is better than another one. These items are + considered in the computation: + - A match with same case is much better than a match + with different case. + - A match that starts after a non-alphanumeric + character is better than a match in the middle of a + word. + - A match at or near the beginning of the tag is + better than a match further on. + - The more alphanumeric characters match, the better. + - The shorter the length of the match, the better. + + The 'helplang' option is used to select a language, if + the {subject} is available in several languages. + To find a tag in a specific language, append "@ab", + where "ab" is the two-letter language code. See + |help-translated|. + + Note that the longer the {subject} you give, the less + matches will be found. You can get an idea how this + all works by using commandline completion (type CTRL-D + after ":help subject" |c_CTRL-D|). + If there are several matches, you can have them listed + by hitting CTRL-D. Example: > + :help cont<Ctrl-D> + +< Instead of typing ":help CTRL-V" to search for help + for CTRL-V you can type: > + :help ^V +< This also works together with other characters, for + example to find help for CTRL-V in Insert mode: > + :help i^V +< + It is also possible to first do ":help" and then + use ":tag {pattern}" in the help window. The + ":tnext" command can then be used to jump to other + matches, "tselect" to list matches and choose one. > + :help index + :tselect /.*mode + +< When there is no argument you will see matches for + "help", to avoid listing all possible matches (that + would be very slow). + The number of matches displayed is limited to 300. + + The `:help` command can be followed by '|' and another + command, but you don't need to escape the '|' inside a + help command. So these both work: > + :help | + :help k| only +< Note that a space before the '|' is seen as part of + the ":help" argument. + You can also use <LF> or <CR> to separate the help + command from a following command. You need to type + CTRL-V first to insert the <LF> or <CR>. Example: > + :help so<C-V><CR>only +< {not in Vi} + +:h[elp]! [subject] Like ":help", but in non-English help files prefer to + find a tag in a file with the same language as the + current file. See |help-translated|. + + *:helpc* *:helpclose* +:helpc[lose] Close one help window, if there is one. + + *:helpg* *:helpgrep* +:helpg[rep] {pattern}[@xx] + Search all help text files and make a list of lines + in which {pattern} matches. Jumps to the first match. + The optional [@xx] specifies that only matches in the + "xx" language are to be found. + You can navigate through the matches with the + |quickfix| commands, e.g., |:cnext| to jump to the + next one. Or use |:cwindow| to get the list of + matches in the quickfix window. + {pattern} is used as a Vim regexp |pattern|. + 'ignorecase' is not used, add "\c" to ignore case. + Example for case sensitive search: > + :helpgrep Uganda +< Example for case ignoring search: > + :helpgrep uganda\c +< Example for searching in French help: > + :helpgrep backspace@fr +< The pattern does not support line breaks, it must + match within one line. You can use |:grep| instead, + but then you need to get the list of help files in a + complicated way. + Cannot be followed by another command, everything is + used as part of the pattern. But you can use + |:execute| when needed. + Compressed help files will not be searched (Fedora + compresses the help files). + {not in Vi} + + *:lh* *:lhelpgrep* +:lh[elpgrep] {pattern}[@xx] + Same as ":helpgrep", except the location list is used + instead of the quickfix list. If the help window is + already opened, then the location list for that window + is used. Otherwise, a new help window is opened and + the location list for that window is set. The + location list for the current window is not changed + then. + + *:exu* *:exusage* +:exu[sage] Show help on Ex commands. Added to simulate the Nvi + command. {not in Vi} + + *:viu* *:viusage* +:viu[sage] Show help on Normal mode commands. Added to simulate + the Nvi command. {not in Vi} + +When no argument is given to |:help| the file given with the 'helpfile' option +will be opened. Otherwise the specified tag is searched for in all "doc/tags" +files in the directories specified in the 'runtimepath' option. + +The initial height of the help window can be set with the 'helpheight' option +(default 20). + +Jump to specific subjects by using tags. This can be done in two ways: +- Use the "CTRL-]" command while standing on the name of a command or option. + This only works when the tag is a keyword. "<C-Leftmouse>" and + "g<LeftMouse>" work just like "CTRL-]". +- use the ":ta {subject}" command. This also works with non-keyword + characters. + +Use CTRL-T or CTRL-O to jump back. +Use ":q" to close the help window. + +If there are several matches for an item you are looking for, this is how you +can jump to each one of them: +1. Open a help window +2. Use the ":tag" command with a slash prepended to the tag. E.g.: > + :tag /min +3. Use ":tnext" to jump to the next matching tag. + +It is possible to add help files for plugins and other items. You don't need +to change the distributed help files for that. See |add-local-help|. + +To write a local help file, see |write-local-help|. + +Note that the title lines from the local help files are automagically added to +the "LOCAL ADDITIONS" section in the "help.txt" help file |local-additions|. +This is done when viewing the file in Vim, the file itself is not changed. It +is done by going through all help files and obtaining the first line of each +file. The files in $VIMRUNTIME/doc are skipped. + + *help-xterm-window* +If you want to have the help in another xterm window, you could use this +command: > + :!xterm -e vim +help & +< + + *:helpfind* *:helpf* +:helpf[ind] Like |:help|, but use a dialog to enter the argument. + Only for backwards compatibility. It now executes the + ToolBar.FindHelp menu entry instead of using a builtin + dialog. {only when compiled with |+GUI_GTK|} + {not in Vi} + + *:helpt* *:helptags* + *E154* *E150* *E151* *E152* *E153* *E670* +:helpt[ags] [++t] {dir} + Generate the help tags file(s) for directory {dir}. + When {dir} is ALL then all "doc" directories in + 'runtimepath' will be used. + + All "*.txt" and "*.??x" files in the directory and + sub-directories are scanned for a help tag definition + in between stars. The "*.??x" files are for + translated docs, they generate the "tags-??" file, see + |help-translated|. The generated tags files are + sorted. + When there are duplicates an error message is given. + An existing tags file is silently overwritten. + + The optional "++t" argument forces adding the + "help-tags" tag. This is also done when the {dir} is + equal to $VIMRUNTIME/doc. + + To rebuild the help tags in the runtime directory + (requires write permission there): > + :helptags $VIMRUNTIME/doc +< {not in Vi} + + +============================================================================== +2. Translated help files *help-translated* + +It is possible to add translated help files, next to the original English help +files. Vim will search for all help in "doc" directories in 'runtimepath'. +This is only available when compiled with the |+multi_lang| feature. + +At this moment translations are available for: + Chinese - multiple authors + French - translated by David Blanchet + Italian - translated by Antonio Colombo + Japanese - multiple authors + Polish - translated by Mikolaj Machowski + Russian - translated by Vassily Ragosin +See the Vim website to find them: http://www.vim.org/translations.php + +A set of translated help files consists of these files: + + help.abx + howto.abx + ... + tags-ab + +"ab" is the two-letter language code. Thus for Italian the names are: + + help.itx + howto.itx + ... + tags-it + +The 'helplang' option can be set to the preferred language(s). The default is +set according to the environment. Vim will first try to find a matching tag +in the preferred language(s). English is used when it cannot be found. + +To find a tag in a specific language, append "@ab" to a tag, where "ab" is the +two-letter language code. Example: > + :he user-manual@it + :he user-manual@en +The first one finds the Italian user manual, even when 'helplang' is empty. +The second one finds the English user manual, even when 'helplang' is set to +"it". + +When using command-line completion for the ":help" command, the "@en" +extension is only shown when a tag exists for multiple languages. When the +tag only exists for English "@en" is omitted. When the first candidate has an +"@ab" extension and it matches the first language in 'helplang' "@ab" is also +omitted. + +When using |CTRL-]| or ":help!" in a non-English help file Vim will try to +find the tag in the same language. If not found then 'helplang' will be used +to select a language. + +Help files must use latin1 or utf-8 encoding. Vim assumes the encoding is +utf-8 when finding non-ASCII characters in the first line. Thus you must +translate the header with "For Vim version". + +The same encoding must be used for the help files of one language in one +directory. You can use a different encoding for different languages and use +a different encoding for help files of the same language but in a different +directory. + +Hints for translators: +- Do not translate the tags. This makes it possible to use 'helplang' to + specify the preferred language. You may add new tags in your language. +- When you do not translate a part of a file, add tags to the English version, + using the "tag@en" notation. +- Make a package with all the files and the tags file available for download. + Users can drop it in one of the "doc" directories and start use it. + Report this to Bram, so that he can add a link on www.vim.org. +- Use the |:helptags| command to generate the tags files. It will find all + languages in the specified directory. + +============================================================================== +3. Writing help files *help-writing* + +For ease of use, a Vim help file for a plugin should follow the format of the +standard Vim help files. If you are writing a new help file it's best to copy +one of the existing files and use it as a template. + +The first line in a help file should have the following format: + +*helpfile_name.txt* For Vim version 7.3 Last change: 2010 June 4 + +The first field is a link to the help file name. The second field describes +the applicable Vim version. The last field specifies the last modification +date of the file. Each field is separated by a tab. + +At the bottom of the help file, place a Vim modeline to set the 'textwidth' +and 'tabstop' options and the 'filetype' to "help". Never set a global option +in such a modeline, that can have consequences undesired by whoever reads that +help. + + +TAGS + +To define a help tag, place the name between asterisks (*tag-name*). The +tag-name should be different from all the Vim help tag names and ideally +should begin with the name of the Vim plugin. The tag name is usually right +aligned on a line. + +When referring to an existing help tag and to create a hot-link, place the +name between two bars (|) eg. |help-writing|. + +When referring to a Vim command and to create a hot-link, place the +name between two backticks, eg. inside `:filetype`. You will see this is +highlighted as a command, like a code block (see below). + +When referring to a Vim option in the help file, place the option name between +two single quotes, eg. 'statusline' + + +HIGHLIGHTING + +To define a column heading, use a tilde character at the end of the line. +This will highlight the column heading in a different color. E.g. + +Column heading~ + +To separate sections in a help file, place a series of '=' characters in a +line starting from the first column. The section separator line is highlighted +differently. + +To quote a block of ex-commands verbatim, place a greater than (>) character +at the end of the line before the block and a less than (<) character as the +first non-blank on a line following the block. Any line starting in column 1 +also implicitly stops the block of ex-commands before it. E.g. > + function Example_Func() + echo "Example" + endfunction +< + +The following are highlighted differently in a Vim help file: + - a special key name expressed either in <> notation as in <PageDown>, or + as a Ctrl character as in CTRL-X + - anything between {braces}, e.g. {lhs} and {rhs} + +The word "Note", "Notes" and similar automagically receive distinctive +highlighting. So do these: + *Todo something to do + *Error something wrong + +You can find the details in $VIMRUNTIME/syntax/help.vim + + vim:tw=78:ts=8:noet:ft=help:norl: |