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authorTom Ryder <tom@sanctum.geek.nz>2018-05-31 17:41:20 +1200
committerTom Ryder <tom@sanctum.geek.nz>2018-05-31 17:41:20 +1200
commite70de13287c7a7a0a408075b7954e9d14ed606bf (patch)
tree57ce6249662e98fac91129d01b9a6322b28040b2 /plugin
downloadvim-big-file-options-e70de13287c7a7a0a408075b7954e9d14ed606bf.tar.gz
vim-big-file-options-e70de13287c7a7a0a408075b7954e9d14ed606bf.zip
Initial commitv0.1.0
Copied with minimal changes from tejr's dotfiles suite, v0.36.0.
Diffstat (limited to 'plugin')
-rw-r--r--plugin/big_file_options.vim66
1 files changed, 66 insertions, 0 deletions
diff --git a/plugin/big_file_options.vim b/plugin/big_file_options.vim
new file mode 100644
index 0000000..f7fa028
--- /dev/null
+++ b/plugin/big_file_options.vim
@@ -0,0 +1,66 @@
+"
+" 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') || &compatible
+ finish
+endif
+if !has('autocmd')
+ 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