Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Tag: 1.6
Fetching contributors…

Cannot retrieve contributors at this time

264 lines (229 sloc) 8.485 kB
" Author: Nate Kane <nathanaelkane AT gmail DOT com>
" Homepage: http://github.com/nathanaelkane/vim-indent-guides
"
" Toggles the indent guides on and off.
"
function! indent_guides#toggle()
call indent_guides#init_matches()
if empty(w:indent_guides_matches)
call indent_guides#enable()
else
call indent_guides#disable()
endif
endfunction
"
" Called from autocmds, keeps indent guides enabled or disabled when entering
" other buffers and windows.
"
function! indent_guides#process_autocmds()
if g:indent_guides_autocmds_enabled
call indent_guides#enable()
else
call indent_guides#disable()
end
endfunction
"
" Enables the indent guides for the current buffer and any other buffer upon
" entering it.
"
function! indent_guides#enable()
let g:indent_guides_autocmds_enabled = 1
call indent_guides#init_script_vars()
call indent_guides#highlight_colors()
call indent_guides#clear_matches()
" loop through each indent level and define a highlight pattern
" will automagically figure out whether to use tabs or spaces
for l:level in range(s:start_level, s:indent_levels)
let l:group = 'IndentGuides' . ((l:level % 2 == 0) ? 'Even' : 'Odd')
let l:column_start = (l:level - 1) * s:indent_size + 1
let l:soft_pattern = indent_guides#indent_highlight_pattern('\s', l:column_start, s:guide_size)
let l:hard_pattern = indent_guides#indent_highlight_pattern('\t', l:column_start, s:indent_size)
" define the higlight patterns and add to matches list
if g:indent_guides_space_guides
call add(w:indent_guides_matches, matchadd(l:group, l:soft_pattern))
end
call add(w:indent_guides_matches, matchadd(l:group, l:hard_pattern))
endfor
endfunction
"
" Disables the indent guides for the current buffer and any other buffer upon
" entering it.
"
function! indent_guides#disable()
let g:indent_guides_autocmds_enabled = 0
call indent_guides#clear_matches()
endfunction
"
" Clear all highlight matches for the current window.
"
function! indent_guides#clear_matches()
call indent_guides#init_matches()
if !empty(w:indent_guides_matches)
let l:index = 0
for l:match_id in w:indent_guides_matches
try
call matchdelete(l:match_id)
catch /E803:/
" Do nothing
endtry
call remove(w:indent_guides_matches, l:index)
let l:index += l:index
endfor
endif
endfunction
"
" Automagically calculates and defines the indent highlight colors.
"
function! indent_guides#highlight_colors()
if s:auto_colors
if has('gui_running')
call indent_guides#gui_highlight_colors()
else
call indent_guides#basic_highlight_colors()
endif
endif
endfunction
"
" Defines some basic indent highlight colors that work for Terminal Vim and
" gVim when colors can't be automatically calculated.
"
function! indent_guides#basic_highlight_colors()
let l:cterm_colors = (&g:background == 'dark') ? ['darkgrey', 'black'] : ['lightgrey', 'white']
let l:gui_colors = (&g:background == 'dark') ? ['grey15', 'grey30'] : ['grey70', 'grey85']
exe 'hi IndentGuidesEven guibg=' . l:gui_colors[0] . ' ctermbg=' . l:cterm_colors[0]
exe 'hi IndentGuidesOdd guibg=' . l:gui_colors[1] . ' ctermbg=' . l:cterm_colors[1]
endfunction
"
" Automagically calculates and defines the indent highlight colors for gui
" vim.
"
function! indent_guides#gui_highlight_colors()
let l:hi_normal_guibg = ''
" capture the backgroud color from the normal highlight
if s:hi_normal =~ s:color_hex_bg_pat
" hex color code is being used, eg. '#FFFFFF'
let l:hi_normal_guibg = matchstr(s:hi_normal, s:color_hex_bg_pat)
elseif s:hi_normal =~ s:color_name_bg_pat
" color name is being used, eg. 'white'
let l:color_name = matchstr(s:hi_normal, s:color_name_bg_pat)
let l:hi_normal_guibg = color_helper#color_name_to_hex(l:color_name)
else
" background color could not be detected, default to basic colors
call indent_guides#basic_highlight_colors()
endif
if l:hi_normal_guibg =~ s:color_hex_pat
" calculate the highlight background colors
let l:hi_odd_bg = indent_guides#lighten_or_darken_color(l:hi_normal_guibg)
let l:hi_even_bg = indent_guides#lighten_or_darken_color(l:hi_odd_bg)
" define the new highlights
exe 'hi IndentGuidesOdd guibg=' . l:hi_odd_bg
exe 'hi IndentGuidesEven guibg=' . l:hi_even_bg
end
endfunction
"
" Takes a color and darkens or lightens it depending on whether a dark or light
" colorscheme is being used.
"
function! indent_guides#lighten_or_darken_color(color)
let l:new_color = ''
if (&g:background == 'dark')
let l:new_color = color_helper#hex_color_lighten(a:color, s:change_percent)
else
let l:new_color = color_helper#hex_color_darken (a:color, s:change_percent)
endif
return l:new_color
endfunction
"
" Define default highlights.
"
function! indent_guides#define_default_highlights()
hi default clear IndentGuidesOdd
hi default clear IndentGuidesEven
endfunction
"
" Init the w:indent_guides_matches variable.
"
function! indent_guides#init_matches()
let w:indent_guides_matches = exists('w:indent_guides_matches') ? w:indent_guides_matches : []
endfunction
"
" We need to initialize these vars every time a buffer is entered while the
" plugin is enabled.
"
function! indent_guides#init_script_vars()
let s:indent_size = &l:shiftwidth
let s:guide_size = indent_guides#calculate_guide_size()
let s:hi_normal = indent_guides#capture_highlight('Normal')
" remove 'font=<value>' from the s:hi_normal string (only seems to happen on Vim startup in Windows)
let s:hi_normal = substitute(s:hi_normal, ' font=[A-Za-z0-9:]\+', "", "")
" shortcuts to the global variables - this makes the code easier to read
let s:debug = g:indent_guides_debug
let s:indent_levels = g:indent_guides_indent_levels
let s:auto_colors = g:indent_guides_auto_colors
let s:color_hex_pat = g:indent_guides_color_hex_pattern
let s:color_hex_bg_pat = g:indent_guides_color_hex_guibg_pattern
let s:color_name_bg_pat = g:indent_guides_color_name_guibg_pattern
let s:start_level = g:indent_guides_start_level
" str2float not available in vim versions <= 7.1
if has('float')
let s:change_percent = g:indent_guides_color_change_percent / str2float('100.0')
else
let s:change_percent = g:indent_guides_color_change_percent / 100.0
endif
if s:debug
echo 's:indent_size = ' . s:indent_size
echo 's:guide_size = ' . s:guide_size
echo 's:hi_normal = ' . s:hi_normal
echo 's:indent_levels = ' . s:indent_levels
echo 's:auto_colors = ' . s:auto_colors
echo 's:change_percent = ' . string(s:change_percent)
echo 's:color_hex_pat = ' . s:color_hex_pat
echo 's:color_hex_bg_pat = ' . s:color_hex_bg_pat
echo 's:color_name_bg_pat = ' . s:color_name_bg_pat
echo 's:start_level = ' . s:start_level
endif
endfunction
"
" Calculate the indent guide size. Ensures the guide size is less than or
" equal to the actual indent size, otherwise some weird things can occur.
"
" NOTE: Currently, this only works when soft-tabs are being used.
"
function! indent_guides#calculate_guide_size()
let l:guide_size = g:indent_guides_guide_size
if l:guide_size == 0 || l:guide_size > s:indent_size
let l:guide_size = s:indent_size
endif
return l:guide_size
endfunction
"
" Captures and returns the output of highlight group definitions.
"
" Example: indent_guides#capture_highlight('normal')
" Returns: 'Normal xxx guifg=#323232 guibg=#ffffff
"
function! indent_guides#capture_highlight(group_name)
redir => l:output
exe "silent hi " . a:group_name
redir END
let l:output = substitute(l:output, "\n", "", "")
return l:output
endfunction
"
" Returns a regex pattern for highlighting an indent level.
"
" Example: indent_guides#indent_highlight_pattern(' ', 1, 4)
" Returns: /^ *\%1v\zs *\%5v\ze/
"
" Example: indent_guides#indent_highlight_pattern('\s', 5, 2)
" Returns: /^\s*\%5v\zs\s*\%7v\ze/
"
" Example: indent_guides#indent_highlight_pattern('\t', 9, 2)
" Returns: /^\t*\%9v\zs\t*\%11v\ze/
"
function! indent_guides#indent_highlight_pattern(indent_pattern, column_start, indent_size)
let l:pattern = '^' . a:indent_pattern . '*\%' . a:column_start . 'v\zs'
let l:pattern .= a:indent_pattern . '*\%' . (a:column_start + a:indent_size) . 'v'
let l:pattern .= '\ze'
return l:pattern
endfunction
Jump to Line
Something went wrong with that request. Please try again.