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Diffstat (limited to 'vim/plugin/big_file_options.vim')
-rw-r--r-- | vim/plugin/big_file_options.vim | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/vim/plugin/big_file_options.vim b/vim/plugin/big_file_options.vim new file mode 100644 index 00000000..bbbedc96 --- /dev/null +++ b/vim/plugin/big_file_options.vim @@ -0,0 +1,65 @@ +" +" big_file_options.vim: When opening a large file, take some measures to keep +" things loading quickly. +" +" Author: Tom Ryder <tom@sanctum.geek.nz> +" License: Same as Vim itself +" +if exists('g:loaded_big_file_options') + \ || !has('autocmd') + \ || &compatible + finish +endif +let g:loaded_big_file_options = 1 + +" Default threshold is 10 MiB +if !exists('g:big_file_size') + let g:big_file_size = 10 * 1024 * 1024 +endif + +" Default to leaving syntax highlighting off +if !exists('g:big_file_syntax') + let g:big_file_syntax = 0 +endif + +" Cut 'synmaxcol' down to this or smaller for big files +if !exists('g:big_file_synmaxcol') + let g:big_file_synmaxcol = 256 +endif + +" Declare function for turning off slow options +function! s:BigFileOptions() + + " Don't do anything if the buffer size is under the threshold + if line2byte(line('$') + 1) <= g:big_file_size + return + endif + + " Turn off backups, swap files, and undo files + setlocal nobackup + setlocal nowritebackup + setlocal noswapfile + if has('persistent_undo') + setlocal noundofile + endif + + " Limit the number of columns of syntax highlighting + if exists('&synmaxcol') + \ && &synmaxcol > g:big_file_synmaxcol + execute 'setlocal synmaxcol=' . g:big_file_synmaxcol + endif + + " Disable syntax highlighting if configured to do so + if !g:big_file_syntax + setlocal syntax=OFF + endif + +endfunction + +" Define autocmd for calling to check filesize +augroup big_file_options_bufreadpost + autocmd! + autocmd BufReadPost + \ * + \ call s:BigFileOptions() +augroup end |