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-rw-r--r--vim/plugin/big_file_options.vim62
1 files changed, 62 insertions, 0 deletions
diff --git a/vim/plugin/big_file_options.vim b/vim/plugin/big_file_options.vim
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+"
+" 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