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diff --git a/runtime/doc/usr_05.txt b/runtime/doc/usr_05.txt new file mode 100644 index 0000000..3a7438d --- /dev/null +++ b/runtime/doc/usr_05.txt @@ -0,0 +1,776 @@ +*usr_05.txt* For Vim version 8.2. Last change: 2019 May 23 + + VIM USER MANUAL - by Bram Moolenaar + + Set your settings + + +Vim can be tuned to work like you want it to. This chapter shows you how to +make Vim start with options set to different values. Add plugins to extend +Vim's capabilities. Or define your own macros. + +|05.1| The vimrc file +|05.2| The example vimrc file explained +|05.3| The defaults.vim file explained +|05.4| Simple mappings +|05.5| Adding a package +|05.6| Adding a plugin +|05.7| Adding a help file +|05.8| The option window +|05.9| Often used options + + Next chapter: |usr_06.txt| Using syntax highlighting + Previous chapter: |usr_04.txt| Making small changes +Table of contents: |usr_toc.txt| + +============================================================================== +*05.1* The vimrc file *vimrc-intro* + +You probably got tired of typing commands that you use very often. To start +Vim with all your favorite option settings and mappings, you write them in +what is called the vimrc file. Vim executes the commands in this file when it +starts up. + +If you already have a vimrc file (e.g., when your sysadmin has one setup for +you), you can edit it this way: > + + :edit $MYVIMRC + +If you don't have a vimrc file yet, see |vimrc| to find out where you can +create a vimrc file. Also, the ":version" command mentions the name of the +"user vimrc file" Vim looks for. + +For Unix and Macintosh this file is always used and is recommended: + + ~/.vimrc ~ + +For MS-Windows you can use one of these: + + $HOME/_vimrc ~ + $VIM/_vimrc ~ + +If you are creating the vimrc file for the first time, it is recommended to +put this line at the top: > + + source $VIMRUNTIME/defaults.vim + +This initializes Vim for new users (as opposed to traditional Vi users). See +|defaults.vim| for the details. + +The vimrc file can contain all the commands that you type after a colon. The +simplest ones are for setting options. For example, if you want Vim to always +start with the 'incsearch' option on, add this line your vimrc file: > + + set incsearch + +For this new line to take effect you need to exit Vim and start it again. +Later you will learn how to do this without exiting Vim. + +This chapter only explains the most basic items. For more information on how +to write a Vim script file: |usr_41.txt|. + +============================================================================== +*05.2* The example vimrc file explained *vimrc_example.vim* + +In the first chapter was explained how the example vimrc (included in the +Vim distribution) file can be used to make Vim startup in not-compatible mode +(see |not-compatible|). The file can be found here: + + $VIMRUNTIME/vimrc_example.vim ~ + +In this section we will explain the various commands used in this file. This +will give you hints about how to set up your own preferences. Not everything +will be explained though. Use the ":help" command to find out more. + +> + " Get the defaults that most users want. + source $VIMRUNTIME/defaults.vim + +This loads the "defaults.vim" file in the $VIMRUNTIME directory. This sets up +Vim for how most users like it. If you are one of the few that don't, then +comment out this line. The commands are explained below: +|defaults.vim-explained| + +> + if has("vms") + set nobackup + else + set backup + if has('persistent_undo') + set undofile + endif + endif + +This tells Vim to keep a backup copy of a file when overwriting it. But not +on the VMS system, since it keeps old versions of files already. The backup +file will have the same name as the original file with "~" added. See |07.4| + +This also sets the 'undofile' option, if available. This will store the +multi-level undo information in a file. The result is that when you change a +file, exit Vim, and then edit the file again, you can undo the changes made +previously. It's a very powerful and useful feature, at the cost of storing a +file. For more information see |undo-persistence|. + +The "if" command is very useful to set options +only when some condition is met. More about that in |usr_41.txt|. + +> + if &t_Co > 2 || has("gui_running") + set hlsearch + endif + +This switches on the 'hlsearch' option, telling Vim to highlight matches with +the last used search pattern. + +> + augroup vimrcEx + au! + autocmd FileType text setlocal textwidth=78 + augroup END + +This makes Vim break text to avoid lines getting longer than 78 characters. +But only for files that have been detected to be plain text. There are +actually two parts here. "autocmd FileType text" is an autocommand. This +defines that when the file type is set to "text" the following command is +automatically executed. "setlocal textwidth=78" sets the 'textwidth' option +to 78, but only locally in one file. + +The wrapper with "augroup vimrcEx" and "augroup END" makes it possible to +delete the autocommand with the "au!" command. See |:augroup|. + +> + if has('syntax') && has('eval') + packadd! matchit + endif + +This loads the "matchit" plugin if the required features are available. +It makes the |%| command more powerful. This is explained at +|matchit-install|. + + +============================================================================== +*05.3* The defaults.vim file explained *defaults.vim-explained* + +The |defaults.vim| file is loaded when the user has no vimrc file. When you +create a new vimrc file, add this line near the top to keep using it: > + + source $VIMRUNTIME/defaults.vim + +Or use the vimrc_example.vim file, as explained above. + +The following explains what defaults.vim is doing. + +> + if exists('skip_defaults_vim') + finish + endif + +Loading defaults.vim can be disabled with this command: > + let skip_defaults_vim = 1 +This has to be done in the system vimrc file. See |system-vimrc|. If you +have a user vimrc this is not needed, since defaults.vim will not be loaded +automatically. + +> + set nocompatible + +As mentioned in the first chapter, these manuals explain Vim working in an +improved way, thus not completely Vi compatible. Setting the 'compatible' +option off, thus 'nocompatible' takes care of this. + +> + set backspace=indent,eol,start + +This specifies where in Insert mode the <BS> is allowed to delete the +character in front of the cursor. The three items, separated by commas, tell +Vim to delete the white space at the start of the line, a line break and the +character before where Insert mode started. See 'backspace'. + +> + set history=200 + +Keep 200 commands and 200 search patterns in the history. Use another number +if you want to remember fewer or more lines. See 'history'. + +> + set ruler + +Always display the current cursor position in the lower right corner of the +Vim window. See 'ruler'. + +> + set showcmd + +Display an incomplete command in the lower right corner of the Vim window, +left of the ruler. For example, when you type "2f", Vim is waiting for you to +type the character to find and "2f" is displayed. When you press "w" next, +the "2fw" command is executed and the displayed "2f" is removed. + + +-------------------------------------------------+ + |text in the Vim window | + |~ | + |~ | + |-- VISUAL -- 2f 43,8 17% | + +-------------------------------------------------+ + ^^^^^^^^^^^ ^^^^^^^^ ^^^^^^^^^^ + 'showmode' 'showcmd' 'ruler' + + +> + set wildmenu + +Display completion matches in a status line. That is when you type <Tab> and +there is more than one match. See 'wildmenu'. + +> + set ttimeout + set ttimeoutlen=100 + +This makes typing Esc take effect more quickly. Normally Vim waits a second +to see if the Esc is the start of an escape sequence. If you have a very slow +remote connection, increase the number. See 'ttimeout'. + +> + set display=truncate + +Show @@@ in the last line if it is truncated, instead of hiding the whole +line. See 'display'. + +> + set incsearch + +Display the match for a search pattern when halfway typing it. See +'incsearch'. + +> + set nrformats-=octal + +Do not recognize numbers starting with a zero as octal. See 'nrformats'. + +> + map Q gq + +This defines a key mapping. More about that in the next section. This +defines the "Q" command to do formatting with the "gq" operator. This is how +it worked before Vim 5.0. Otherwise the "Q" command starts Ex mode, but you +will not need it. + +> + inoremap <C-U> <C-G>u<C-U> + +CTRL-U in insert mode deletes all entered text in the current line. Use +CTRL-G u to first break undo, so that you can undo CTRL-U after inserting a +line break. Revert with ":iunmap <C-U>". + +> + if has('mouse') + set mouse=a + endif + +Enable using the mouse if available. See 'mouse'. + +> + vnoremap _g y:exe "grep /" . escape(@", '\\/') . "/ *.c *.h"<CR> + +This mapping yanks the visually selected text and searches for it in C files. +You can see that a mapping can be used to do quite complicated things. Still, +it is just a sequence of commands that are executed like you typed them. + +> + syntax on + +Enable highlighting files in color. See |syntax|. + + *vimrc-filetype* > + filetype plugin indent on + +This switches on three very clever mechanisms: +1. Filetype detection. + Whenever you start editing a file, Vim will try to figure out what kind of + file this is. When you edit "main.c", Vim will see the ".c" extension and + recognize this as a "c" filetype. When you edit a file that starts with + "#!/bin/sh", Vim will recognize it as a "sh" filetype. + The filetype detection is used for syntax highlighting and the other two + items below. + See |filetypes|. + +2. Using filetype plugin files + Many different filetypes are edited with different options. For example, + when you edit a "c" file, it's very useful to set the 'cindent' option to + automatically indent the lines. These commonly useful option settings are + included with Vim in filetype plugins. You can also add your own, see + |write-filetype-plugin|. + +3. Using indent files + When editing programs, the indent of a line can often be computed + automatically. Vim comes with these indent rules for a number of + filetypes. See |:filetype-indent-on| and 'indentexpr'. + + + *restore-cursor* *last-position-jump* > + autocmd BufReadPost * + \ if line("'\"") >= 1 && line("'\"") <= line("$") && &ft !~# 'commit' + \ | exe "normal! g`\"" + \ | endif + +Another autocommand. This time it is used after reading any file. The +complicated stuff after it checks if the '" mark is defined, and jumps to it +if so. The backslash at the start of a line is used to continue the command +from the previous line. That avoids a line getting very long. +See |line-continuation|. This only works in a Vim script file, not when +typing commands at the command-line. + +> + command DiffOrig vert new | set bt=nofile | r ++edit # | 0d_ | diffthis + \ | wincmd p | diffthis + +This adds the ":DiffOrig" command. Use this in a modified buffer to see the +differences with the file it was loaded from. See |diff| and |:DiffOrig|. + +> + set nolangremap + +Prevent that the langmap option applies to characters that result from a +mapping. If set (default), this may break plugins (but it's backward +compatible). See 'langremap'. + +============================================================================== +*05.4* Simple mappings + +A mapping enables you to bind a set of Vim commands to a single key. Suppose, +for example, that you need to surround certain words with curly braces. In +other words, you need to change a word such as "amount" into "{amount}". With +the :map command, you can tell Vim that the F5 key does this job. The command +is as follows: > + + :map <F5> i{<Esc>ea}<Esc> +< + Note: + When entering this command, you must enter <F5> by typing four + characters. Similarly, <Esc> is not entered by pressing the <Esc> + key, but by typing five characters. Watch out for this difference + when reading the manual! + +Let's break this down: + <F5> The F5 function key. This is the trigger key that causes the + command to be executed as the key is pressed. + + i{<Esc> Insert the { character. The <Esc> key ends Insert mode. + + e Move to the end of the word. + + a}<Esc> Append the } to the word. + +After you execute the ":map" command, all you have to do to put {} around a +word is to put the cursor on the first character and press F5. + +In this example, the trigger is a single key; it can be any string. But when +you use an existing Vim command, that command will no longer be available. +You better avoid that. + One key that can be used with mappings is the backslash. Since you +probably want to define more than one mapping, add another character. You +could map "\p" to add parentheses around a word, and "\c" to add curly braces, +for example: > + + :map \p i(<Esc>ea)<Esc> + :map \c i{<Esc>ea}<Esc> + +You need to type the \ and the p quickly after another, so that Vim knows they +belong together. + +The ":map" command (with no arguments) lists your current mappings. At +least the ones for Normal mode. More about mappings in section |40.1|. + +============================================================================== +*05.5* Adding a package *add-package* *matchit-install* + +A package is a set of files that you can add to Vim. There are two kinds of +packages: optional and automatically loaded on startup. + +The Vim distribution comes with a few packages that you can optionally use. +For example, the matchit plugin. This plugin makes the "%" command jump to +matching HTML tags, if/else/endif in Vim scripts, etc. Very useful, although +it's not backwards compatible (that's why it is not enabled by default). + +To start using the matchit plugin, add one line to your vimrc file: > + packadd! matchit + +That's all! After restarting Vim you can find help about this plugin: > + :help matchit + +This works, because when `:packadd` loaded the plugin it also added the +package directory in 'runtimepath', so that the help file can be found. + +You can find packages on the Internet in various places. It usually comes as +an archive or as a repository. For an archive you can follow these steps: + 1. create the package directory: > + mkdir -p ~/.vim/pack/fancy +< "fancy" can be any name of your liking. Use one that describes the + package. + 2. unpack the archive in that directory. This assumes the top + directory in the archive is "start": > + cd ~/.vim/pack/fancy + unzip /tmp/fancy.zip +< If the archive layout is different make sure that you end up with a + path like this: + ~/.vim/pack/fancy/start/fancytext/plugin/fancy.vim ~ + Here "fancytext" is the name of the package, it can be anything + else. + +More information about packages can be found here: |packages|. + +============================================================================== +*05.6* Adding a plugin *add-plugin* *plugin* + +Vim's functionality can be extended by adding plugins. A plugin is nothing +more than a Vim script file that is loaded automatically when Vim starts. You +can add a plugin very easily by dropping it in your plugin directory. +{not available when Vim was compiled without the |+eval| feature} + +There are two types of plugins: + + global plugin: Used for all kinds of files + filetype plugin: Only used for a specific type of file + +The global plugins will be discussed first, then the filetype ones +|add-filetype-plugin|. + + +GLOBAL PLUGINS *standard-plugin* + +When you start Vim, it will automatically load a number of global plugins. +You don't have to do anything for this. They add functionality that most +people will want to use, but which was implemented as a Vim script instead of +being compiled into Vim. You can find them listed in the help index +|standard-plugin-list|. Also see |load-plugins|. + + *add-global-plugin* +You can add a global plugin to add functionality that will always be present +when you use Vim. There are only two steps for adding a global plugin: +1. Get a copy of the plugin. +2. Drop it in the right directory. + + +GETTING A GLOBAL PLUGIN + +Where can you find plugins? +- Some are always loaded, you can see them in the directory $VIMRUNTIME/plugin. +- Some come with Vim. You can find them in the directory $VIMRUNTIME/macros + and its sub-directories and under $VIM/vimfiles/pack/dist/opt/. +- Download from the net. There is a large collection on http://www.vim.org. +- They are sometimes posted in a Vim |maillist|. +- You could write one yourself, see |write-plugin|. + +Some plugins come as a vimball archive, see |vimball|. +Some plugins can be updated automatically, see |getscript|. + + +USING A GLOBAL PLUGIN + +First read the text in the plugin itself to check for any special conditions. +Then copy the file to your plugin directory: + + system plugin directory ~ + Unix ~/.vim/plugin/ + PC $HOME/vimfiles/plugin or $VIM/vimfiles/plugin + Amiga s:vimfiles/plugin + Macintosh $VIM:vimfiles:plugin + Mac OS X ~/.vim/plugin/ + +Example for Unix (assuming you didn't have a plugin directory yet): > + + mkdir ~/.vim + mkdir ~/.vim/plugin + cp /tmp/yourplugin.vim ~/.vim/plugin + +That's all! Now you can use the commands defined in this plugin. + +Instead of putting plugins directly into the plugin/ directory, you may +better organize them by putting them into subdirectories under plugin/. +As an example, consider using "~/.vim/plugin/perl/*.vim" for all your Perl +plugins. + + +FILETYPE PLUGINS *add-filetype-plugin* *ftplugins* + +The Vim distribution comes with a set of plugins for different filetypes that +you can start using with this command: > + + :filetype plugin on + +That's all! See |vimrc-filetype|. + +If you are missing a plugin for a filetype you are using, or you found a +better one, you can add it. There are two steps for adding a filetype plugin: +1. Get a copy of the plugin. +2. Drop it in the right directory. + + +GETTING A FILETYPE PLUGIN + +You can find them in the same places as the global plugins. Watch out if the +type of file is mentioned, then you know if the plugin is a global or a +filetype one. The scripts in $VIMRUNTIME/macros are global ones, the filetype +plugins are in $VIMRUNTIME/ftplugin. + + +USING A FILETYPE PLUGIN *ftplugin-name* + +You can add a filetype plugin by dropping it in the right directory. The +name of this directory is in the same directory mentioned above for global +plugins, but the last part is "ftplugin". Suppose you have found a plugin for +the "stuff" filetype, and you are on Unix. Then you can move this file to the +ftplugin directory: > + + mv thefile ~/.vim/ftplugin/stuff.vim + +If that file already exists you already have a plugin for "stuff". You might +want to check if the existing plugin doesn't conflict with the one you are +adding. If it's OK, you can give the new one another name: > + + mv thefile ~/.vim/ftplugin/stuff_too.vim + +The underscore is used to separate the name of the filetype from the rest, +which can be anything. If you use "otherstuff.vim" it wouldn't work, it would +be loaded for the "otherstuff" filetype. + +On MS-DOS like filesystems you cannot use long filenames. You would run into +trouble if you add a second plugin and the filetype has more than six +characters. You can use an extra directory to get around this: > + + mkdir $VIM/vimfiles/ftplugin/fortran + copy thefile $VIM/vimfiles/ftplugin/fortran/too.vim + +The generic names for the filetype plugins are: > + + ftplugin/<filetype>.vim + ftplugin/<filetype>_<name>.vim + ftplugin/<filetype>/<name>.vim + +Here "<name>" can be any name that you prefer. +Examples for the "stuff" filetype on Unix: > + + ~/.vim/ftplugin/stuff.vim + ~/.vim/ftplugin/stuff_def.vim + ~/.vim/ftplugin/stuff/header.vim + +The <filetype> part is the name of the filetype the plugin is to be used for. +Only files of this filetype will use the settings from the plugin. The <name> +part of the plugin file doesn't matter, you can use it to have several plugins +for the same filetype. Note that it must end in ".vim". + + +Further reading: +|filetype-plugins| Documentation for the filetype plugins and information + about how to avoid that mappings cause problems. +|load-plugins| When the global plugins are loaded during startup. +|ftplugin-overrule| Overruling the settings from a global plugin. +|write-plugin| How to write a plugin script. +|plugin-details| For more information about using plugins or when your + plugin doesn't work. +|new-filetype| How to detect a new file type. + +============================================================================== +*05.7* Adding a help file *add-local-help* + +If you are lucky, the plugin you installed also comes with a help file. We +will explain how to install the help file, so that you can easily find help +for your new plugin. + Let us use the "doit.vim" plugin as an example. This plugin comes with +documentation: "doit.txt". Let's first copy the plugin to the right +directory. This time we will do it from inside Vim. (You may skip some of +the "mkdir" commands if you already have the directory.) > + + :!mkdir ~/.vim + :!mkdir ~/.vim/plugin + :!cp /tmp/doit.vim ~/.vim/plugin + +The "cp" command is for Unix, on MS-Windows you can use "copy". + +Now create a "doc" directory in one of the directories in 'runtimepath'. > + + :!mkdir ~/.vim/doc + +Copy the help file to the "doc" directory. > + + :!cp /tmp/doit.txt ~/.vim/doc + +Now comes the trick, which allows you to jump to the subjects in the new help +file: Generate the local tags file with the |:helptags| command. > + + :helptags ~/.vim/doc + +Now you can use the > + + :help doit + +command to find help for "doit" in the help file you just added. You can see +an entry for the local help file when you do: > + + :help local-additions + +The title lines from the local help files are automagically added to this +section. There you can see which local help files have been added and jump to +them through the tag. + +For writing a local help file, see |write-local-help|. + +============================================================================== +*05.8* The option window + +If you are looking for an option that does what you want, you can search in +the help files here: |options|. Another way is by using this command: > + + :options + +This opens a new window, with a list of options with a one-line explanation. +The options are grouped by subject. Move the cursor to a subject and press +<Enter> to jump there. Press <Enter> again to jump back. Or use CTRL-O. + +You can change the value of an option. For example, move to the "displaying +text" subject. Then move the cursor down to this line: + + set wrap nowrap ~ + +When you hit <Enter>, the line will change to: + + set nowrap wrap ~ + +The option has now been switched off. + +Just above this line is a short description of the 'wrap' option. Move the +cursor one line up to place it in this line. Now hit <Enter> and you jump to +the full help on the 'wrap' option. + +For options that take a number or string argument you can edit the value. +Then press <Enter> to apply the new value. For example, move the cursor a few +lines up to this line: + + set so=0 ~ + +Position the cursor on the zero with "$". Change it into a five with "r5". +Then press <Enter> to apply the new value. When you now move the cursor +around you will notice that the text starts scrolling before you reach the +border. This is what the 'scrolloff' option does, it specifies an offset +from the window border where scrolling starts. + +============================================================================== +*05.9* Often used options + +There are an awful lot of options. Most of them you will hardly ever use. +Some of the more useful ones will be mentioned here. Don't forget you can +find more help on these options with the ":help" command, with single quotes +before and after the option name. For example: > + + :help 'wrap' + +In case you have messed up an option value, you can set it back to the +default by putting an ampersand (&) after the option name. Example: > + + :set iskeyword& + + +NOT WRAPPING LINES + +Vim normally wraps long lines, so that you can see all of the text. Sometimes +it's better to let the text continue right of the window. Then you need to +scroll the text left-right to see all of a long line. Switch wrapping off +with this command: > + + :set nowrap + +Vim will automatically scroll the text when you move to text that is not +displayed. To see a context of ten characters, do this: > + + :set sidescroll=10 + +This doesn't change the text in the file, only the way it is displayed. + + +WRAPPING MOVEMENT COMMANDS + +Most commands for moving around will stop moving at the start and end of a +line. You can change that with the 'whichwrap' option. This sets it to the +default value: > + + :set whichwrap=b,s + +This allows the <BS> key, when used in the first position of a line, to move +the cursor to the end of the previous line. And the <Space> key moves from +the end of a line to the start of the next one. + +To allow the cursor keys <Left> and <Right> to also wrap, use this command: > + + :set whichwrap=b,s,<,> + +This is still only for Normal mode. To let <Left> and <Right> do this in +Insert mode as well: > + + :set whichwrap=b,s,<,>,[,] + +There are a few other flags that can be added, see 'whichwrap'. + + +VIEWING TABS + +When there are tabs in a file, you cannot see where they are. To make them +visible: > + + :set list + +Now every tab is displayed as ^I. And a $ is displayed at the end of each +line, so that you can spot trailing spaces that would otherwise go unnoticed. + A disadvantage is that this looks ugly when there are many Tabs in a file. +If you have a color terminal, or are using the GUI, Vim can show the spaces +and tabs as highlighted characters. Use the 'listchars' option: > + + :set listchars=tab:>-,trail:- + +Now every tab will be displayed as ">---" (with more or less "-") and trailing +white space as "-". Looks a lot better, doesn't it? + + +KEYWORDS + +The 'iskeyword' option specifies which characters can appear in a word: > + + :set iskeyword +< iskeyword=@,48-57,_,192-255 ~ + +The "@" stands for all alphabetic letters. "48-57" stands for ASCII +characters 48 to 57, which are the numbers 0 to 9. "192-255" are the +printable latin characters. + Sometimes you will want to include a dash in keywords, so that commands +like "w" consider "upper-case" to be one word. You can do it like this: > + + :set iskeyword+=- + :set iskeyword +< iskeyword=@,48-57,_,192-255,- ~ + +If you look at the new value, you will see that Vim has added a comma for you. + To remove a character use "-=". For example, to remove the underscore: > + + :set iskeyword-=_ + :set iskeyword +< iskeyword=@,48-57,192-255,- ~ + +This time a comma is automatically deleted. + + +ROOM FOR MESSAGES + +When Vim starts there is one line at the bottom that is used for messages. +When a message is long, it is either truncated, thus you can only see part of +it, or the text scrolls and you have to press <Enter> to continue. + You can set the 'cmdheight' option to the number of lines used for +messages. Example: > + + :set cmdheight=3 + +This does mean there is less room to edit text, thus it's a compromise. + +============================================================================== + +Next chapter: |usr_06.txt| Using syntax highlighting + +Copyright: see |manual-copyright| vim:tw=78:ts=8:noet:ft=help:norl: |