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indentLine

This plugin is used for displaying thin vertical lines at each indentation level for code indented with spaces. For code indented with tabs I think there is no need to support it, because you can use :set list lcs=tab:\|\ (here is a space).

Requirements

This plugin takes advantage of the newly provided conceal feature in Vim 7.3, so this plugin will not work with lower versions of Vim.

Installation

To install the plugin just put the plugin files in your ~/.vim (Linux) or ~/vimfiles (Windows).

If you use a plugin manager you can put the whole directory into your ~/.vim/bundle/ directory (Pathogen) or add the line Plugin 'Yggdroot/indentLine' to your .vimrc (Vundle).

Customization

To apply customization, apply the variable definitions to your .vimrc file.

Change Character Color

" Vim
let g:indentLine_color_term = 239

"GVim
let g:indentLine_color_gui = '#A4E57E'

" none X terminal
let g:indentLine_color_tty_light = 7 " (default: 4)
let g:indentLine_color_dark = 1 " (default: 2)

Change Indent Char

Vim and GVim

let g:indentLine_char = 'c'

where 'c' can be any ASCII character. You can also use one of ¦, , or to display more beautiful lines. However, these characters will only work with files whose encoding is UTF-8.

Change Conceal Behaviour

Vim 7.3 has a new feature conceal Documentation to automatically hide a stretch of text based on syntax highlighting.

let g:indentLine_concealcursor = 'vc' (default 'inc')
let g:indentLine_conceallevel = 0 (default 2)

Disable by default

let g:indentLine_enabled = 0

Commands

:IndentLinesToggle toggles lines on and off.

Font patching

If you find all the standard unicode and ASCII characters too obtrusive, you might consider patching your font with the indentLine-dotted-guide.eps glyph provided. FontForge makes the process amazingly simple:

  1. Download and install FontForge.
  2. Locate and open your terminal/gVim font.
  3. Open the font in FontForge, choose Goto from the View menu and select Private Use Area from the drop down box.
  4. In the private use area, locate a blank spot for the glyph. Make a note of the code, e.g. U+E0A3.
  5. Double-click the selected code point to open the font drawing tool.
  6. From the File menu, select Import... and locate the indentLine-dotted-guide.eps file.
  7. Once imported, choose File -> Generate Fonts and choose a location and file type for the new font.

Once completed, your new font will contain the more subtle dotted guide and all you have to do is set that glyph to g:indentLine_char in your .vimrc file.

Self promotion

If you think this script is helpful, follow the GitHub repository, and don't forget to vote for it on Vim.org! (vimscript #4354).

Screenshots

Vertical bars

Screenshot

Patched font

Screenshot

Leading Spaces

Screenshot

Screenshot

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