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if_ruby.txt
*if_ruby.txt* For Vim version 8.0. Last change: 2018 Mar 15 VIM REFERENCE MANUAL by Shugo Maeda The Ruby Interface to Vim *ruby* *Ruby* 1. Commands |ruby-commands| 2. The Vim module |ruby-vim| 3. Vim::Buffer objects |ruby-buffer| 4. Vim::Window objects |ruby-window| 5. Global variables |ruby-globals| 6. Dynamic loading |ruby-dynamic| {Vi does not have any of these commands} *E266* *E267* *E268* *E269* *E270* *E271* *E272* *E273* The Ruby interface only works when Vim was compiled with the |+ruby| feature. The home page for ruby is http://www.ruby-lang.org/. You can find links for downloading Ruby there. ============================================================================== 1. Commands *ruby-commands* *:ruby* *:rub* :rub[y] {cmd} Execute Ruby command {cmd}. A command to try it out: > :ruby print "Hello" :rub[y] << {endpattern} {script} {endpattern} Execute Ruby script {script}. {endpattern} must NOT be preceded by any white space. If {endpattern} is omitted, it defaults to a dot '.' like for the |:append| and |:insert| commands. This form of the |:ruby| command is mainly useful for including ruby code in vim scripts. Note: This command doesn't work when the Ruby feature wasn't compiled in. To avoid errors, see |script-here|. Example Vim script: > function! RedGem() ruby << EOF class Garnet def initialize(s) @buffer = Vim::Buffer.current vimputs(s) end def vimputs(s) @buffer.append(@buffer.count,s) end end gem = Garnet.new("pretty") EOF endfunction < To see what version of Ruby you have: > :ruby print RUBY_VERSION < *:rubydo* *:rubyd* *E265* :[range]rubyd[o] {cmd} Evaluate Ruby command {cmd} for each line in the [range], with $_ being set to the text of each line in turn, without a trailing <EOL>. Setting $_ will change the text, but note that it is not possible to add or delete lines using this command. The default for [range] is the whole file: "1,$". *:rubyfile* *:rubyf* :rubyf[ile] {file} Execute the Ruby script in {file}. This is the same as `:ruby load 'file'`, but allows file name completion. Executing Ruby commands is not possible in the |sandbox|. ============================================================================== 2. The Vim module *ruby-vim* Ruby code gets all of its access to vim via the "Vim" module. Overview: > print "Hello" # displays a message Vim.command(cmd) # execute an Ex command num = Vim::Window.count # gets the number of windows w = Vim::Window[n] # gets window "n" cw = Vim::Window.current # gets the current window num = Vim::Buffer.count # gets the number of buffers b = Vim::Buffer[n] # gets buffer "n" cb = Vim::Buffer.current # gets the current buffer w.height = lines # sets the window height w.cursor = [row, col] # sets the window cursor position pos = w.cursor # gets an array [row, col] name = b.name # gets the buffer file name line = b[n] # gets a line from the buffer num = b.count # gets the number of lines b[n] = str # sets a line in the buffer b.delete(n) # deletes a line b.append(n, str) # appends a line after n line = Vim::Buffer.current.line # gets the current line num = Vim::Buffer.current.line_number # gets the current line number Vim::Buffer.current.line = "test" # sets the current line number < Module Functions: *ruby-message* Vim::message({msg}) Displays the message {msg}. *ruby-set_option* Vim::set_option({arg}) Sets a vim option. {arg} can be any argument that the ":set" command accepts. Note that this means that no spaces are allowed in the argument! See |:set|. *ruby-command* Vim::command({cmd}) Executes Ex command {cmd}. *ruby-evaluate* Vim::evaluate({expr}) Evaluates {expr} using the vim internal expression evaluator (see |expression|). Returns the expression result as: - a Integer if the Vim expression evaluates to a number - a Float if the Vim expression evaluates to a float - a String if the Vim expression evaluates to a string - a Array if the Vim expression evaluates to a Vim list - a Hash if the Vim expression evaluates to a Vim dictionary Dictionaries and lists are recursively expanded. ============================================================================== 3. Vim::Buffer objects *ruby-buffer* Vim::Buffer objects represent vim buffers. Class Methods: current Returns the current buffer object. count Returns the number of buffers. self[{n}] Returns the buffer object for the number {n}. The first number is 0. Methods: name Returns the name of the buffer. number Returns the number of the buffer. count Returns the number of lines. length Returns the number of lines. self[{n}] Returns a line from the buffer. {n} is the line number. self[{n}] = {str} Sets a line in the buffer. {n} is the line number. delete({n}) Deletes a line from the buffer. {n} is the line number. append({n}, {str}) Appends a line after the line {n}. line Returns the current line of the buffer if the buffer is active. line = {str} Sets the current line of the buffer if the buffer is active. line_number Returns the number of the current line if the buffer is active. ============================================================================== 4. Vim::Window objects *ruby-window* Vim::Window objects represent vim windows. Class Methods: current Returns the current window object. count Returns the number of windows. self[{n}] Returns the window object for the number {n}. The first number is 0. Methods: buffer Returns the buffer displayed in the window. height Returns the height of the window. height = {n} Sets the window height to {n}. width Returns the width of the window. width = {n} Sets the window width to {n}. cursor Returns a [row, col] array for the cursor position. cursor = [{row}, {col}] Sets the cursor position to {row} and {col}. ============================================================================== 5. Global variables *ruby-globals* There are two global variables. $curwin The current window object. $curbuf The current buffer object. ============================================================================== 6. Dynamic loading *ruby-dynamic* On MS-Windows and Unix the Ruby library can be loaded dynamically. The |:version| output then includes |+ruby/dyn|. This means that Vim will search for the Ruby DLL file or shared library only when needed. When you don't use the Ruby interface you don't need it, thus you can use Vim even though this library file is not on your system. MS-Windows ~ You need to install the right version of Ruby for this to work. You can find the package to download from: http://rubyinstaller.org/downloads/ Currently that is rubyinstaller-2.2.5.exe To use the Ruby interface the Ruby DLL must be in your search path. In a console window type "path" to see what directories are used. The 'rubydll' option can be also used to specify the Ruby DLL. The name of the DLL must match the Ruby version Vim was compiled with. Currently the name is "msvcrt-ruby220.dll". That is for Ruby 2.2.X. To know for sure edit "gvim.exe" and search for "ruby\d*.dll\c". If you want to build Vim with RubyInstaller 1.9 or 2.X using MSVC, you need some tricks. See the src/INSTALLpc.txt for detail. If Vim is built with RubyInstaller 2.4 or later, you may also need to add "C:\Ruby<version>\bin\ruby_builtin_dlls" to the PATH environment variable. Unix ~ The 'rubydll' option can be used to specify the Ruby shared library file instead of DYNAMIC_RUBY_DLL file what was specified at compile time. The version of the shared library must match the Ruby version Vim was compiled with. ============================================================================== vim:tw=78:ts=8:ft=help:norl:
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