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Diffstat (limited to 'vim/plugin/big_file_options.vim')
-rw-r--r-- | vim/plugin/big_file_options.vim | 62 |
1 files changed, 62 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..fd686fd8 --- /dev/null +++ b/vim/plugin/big_file_options.vim @@ -0,0 +1,62 @@ +" +" 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 has('eval') && has('autocmd') + + " 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 file is under the threshold + if getfsize(expand('<afile>')) <= 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_bufreadpre + autocmd! + autocmd BufReadPre + \ * + \ call s:BigFileOptions() + augroup end + +endif |