runtime: Reimplement python/clipboard providers in vimscript

Clipboard is implemented with platform-specific shell commands, and python is
implemented with the external plugin facility (rpc#* functions). The
script_host.py file(legacy python-vim emulation plugin) was moved/adapted from
the python client repository.

1 files changed, 40 insertions, 0 deletions

diff --git a/runtime/autoload/provider/clipboard.vim b/runtime/autoload/provider/clipboard.vim
new file mode 100644
index 0000000000..615a80ca6d
--- /dev/null
+++ b/runtime/autoload/provider/clipboard.vim
@@ -0,0 +1,40 @@
+" The clipboard provider uses shell commands to communicate with the clipboard.
+" The provider function will only be registered if one of the supported
+" commands are available.
+let s:copy = ''
+let s:paste = ''
+
+if executable('pbcopy')
+  let s:copy = 'pbcopy'
+  let s:paste = 'pbpaste'
+elseif executable('xsel')
+  let s:copy = 'xsel -i -b'
+  let s:paste = 'xsel -o -b'
+elseif executable('xclip')
+  let s:copy = 'xclip -i -selection clipboard'
+  let s:paste = 'xclip -o -selection clipboard'
+endif
+
+if s:copy == ''
+  echom 'No shell command for communicating with the clipboard found.'
+  finish
+endif
+
+let s:methods = {}
+
+function! s:ClipboardGet(...)
+  return systemlist(s:paste)
+endfunction
+
+function! s:ClipboardSet(...)
+  call systemlist(s:copy, a:1)
+endfunction
+
+let s:methods = {
+      \ 'get': function('s:ClipboardGet'),
+      \ 'set': function('s:ClipboardSet')
+      \ }
+
+function! provider#clipboard#Call(method, args)
+  return s:methods[a:method](a:args)
+endfunction