From cebbf704f7e3048624bddb2e96eaa1db5fe9ef16 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Tue, 4 Dec 2018 08:45:38 +1300
Subject: Unseat tidy(1) as HTML 'equalprg'

Instead, remap \= specifically to use tidy(1) to reformat the whole
buffer.
---
 vim/after/ftplugin/html.vim  | 11 ++++++++---
 vim/after/ftplugin/html.vim~ | 35 +++++++++++++++++++++++++++++++++++
 vim/autoload/html.vim        |  7 +++++++
 3 files changed, 50 insertions(+), 3 deletions(-)
 create mode 100644 vim/after/ftplugin/html.vim~

diff --git a/vim/after/ftplugin/html.vim b/vim/after/ftplugin/html.vim
index b5c387fb..5f7155bc 100644
--- a/vim/after/ftplugin/html.vim
+++ b/vim/after/ftplugin/html.vim
@@ -3,11 +3,16 @@ if &filetype !=# 'html'
   finish
 endif
 
-" Use tidy(1) for checking and program formatting
+" Use tidy(1) for checking
 compiler tidy
-setlocal equalprg=tidy\ -quiet
 let b:undo_ftplugin .= '|unlet b:current_compiler'
-      \ . '|setlocal equalprg< errorformat< makeprg<'
+      \ . '|setlocal errorformat< makeprg<'
+
+" tidy(1) copes fine with formatting an entire document, but not just part of
+" it; we map \= to do the former, but don't actually set 'equalprg', falling
+" back on the good-enough built-in Vim indentation behavior.
+nnoremap <buffer> <Leader>= :<C-U>call html#TidyBuffer()<CR>
+let b:undo_ftplugin .= '|nunmap <buffer> <Leader>='
 
 " Set up hooks for timestamp updating
 augroup html_timestamp
diff --git a/vim/after/ftplugin/html.vim~ b/vim/after/ftplugin/html.vim~
new file mode 100644
index 00000000..5f7155bc
--- /dev/null
+++ b/vim/after/ftplugin/html.vim~
@@ -0,0 +1,35 @@
+" Don't load if the buffer is not actually HTML (e.g. Markdown)
+if &filetype !=# 'html'
+  finish
+endif
+
+" Use tidy(1) for checking
+compiler tidy
+let b:undo_ftplugin .= '|unlet b:current_compiler'
+      \ . '|setlocal errorformat< makeprg<'
+
+" tidy(1) copes fine with formatting an entire document, but not just part of
+" it; we map \= to do the former, but don't actually set 'equalprg', falling
+" back on the good-enough built-in Vim indentation behavior.
+nnoremap <buffer> <Leader>= :<C-U>call html#TidyBuffer()<CR>
+let b:undo_ftplugin .= '|nunmap <buffer> <Leader>='
+
+" Set up hooks for timestamp updating
+augroup html_timestamp
+  autocmd BufWritePre <buffer>
+        \ if exists('b:html_timestamp_check')
+        \|  call html#TimestampUpdate()
+        \|endif
+augroup END
+let b:undo_ftplugin .= '|execute ''autocmd! html_timestamp'''
+      \ . '|augroup! html_timestamp'
+
+" Stop here if the user doesn't want ftplugin mappings
+if exists('g:no_plugin_maps') || exists('g:no_html_maps')
+  finish
+endif
+
+" Transform URLs to HTML anchors
+nnoremap <buffer> <LocalLeader>r
+      \ :<C-U>call html#UrlLink()<CR>
+let b:undo_ftplugin .= '|nunmap <buffer> <LocalLeader>r'
diff --git a/vim/autoload/html.vim b/vim/autoload/html.vim
index c3d99706..e0d47e47 100644
--- a/vim/autoload/html.vim
+++ b/vim/autoload/html.vim
@@ -14,6 +14,13 @@ function! html#UrlLink() abort
 
 endfunction
 
+" Tidy the whole buffer
+function! html#TidyBuffer() abort
+  let l:view = winsaveview()
+  %!tidy -quiet
+  call winrestview(l:view)
+endfunction
+
 " Update a timestamp
 function! html#TimestampUpdate() abort
   if !&modified
-- 
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