Add support and mapping for pasting from clipboard

2 files changed, 51 insertions, 7 deletions

diff --git a/README.md b/README.md
index e7f6b5e..f87b360 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 System Copy
 ===========
 
-System copy provides vim mappings for copying text to the os specific
+System copy provides vim mappings for copying / pastying text to the os specific
 clipboard.  Most people will be happy just setting their Vim clipboard to the
 system clipboard, but I find that doing so pollutes my clipboard history.
 Instead, this plugin creates a unique mapping that explicitly pulls content
@@ -10,8 +10,9 @@ from Vim into the system clipboard.
 Usage
 -----
 
-System copy provides a mapping to copy to the system clipboard. It accepts a
-motion or can be used with a visual selection.
+System copy provides a mapping to copy to the system clipboard using a motion
+or visual selection. It also provides a mapping for pasting from the system
+clipboard.
 
 The default mapping is `cp`, and can be followed by any motion or text
 object. For instance:
@@ -21,6 +22,8 @@ object. For instance:
 
 In addition, `cP` is mapped to copy the current line directly.
 
+The sequence `cv` is mapped to paste the content of system clipboard.
+
 Clipboard Utilities
 -------------------
 
diff --git a/plugin/system_copy.vim b/plugin/system_copy.vim
index 80a58f0..2c6bc7c 100644
--- a/plugin/system_copy.vim
+++ b/plugin/system_copy.vim
@@ -2,6 +2,9 @@ let s:blockwise = 'blockwise visual'
 let s:visual = 'visual'
 let s:motion = 'motion'
 let s:linewise = 'linewise'
+let s:mac = 'mac'
+let s:windows = 'windows'
+let s:linux = 'linux'
 
 if exists('g:loaded_system_copy') || &cp || v:version < 700
   finish
@@ -22,6 +25,12 @@ function! s:system_copy(type, ...) abort
   echohl String | echon 'Copied to system clipboard via: ' . mode | echohl None
 endfunction
 
+function! s:system_paste() abort
+  let command = <SID>PasteCommandForCurrentOS()
+  put =system(command)
+  echohl String | echon 'Pasted to vim using: ' . command | echohl None
+endfunction
+
 function! s:resolve_mode(type, arg)
   let visual_mode = a:arg != 0
   if visual_mode
@@ -33,23 +42,55 @@ function! s:resolve_mode(type, arg)
   endif
 endfunction
 
-function! s:CopyCommandForCurrentOS()
+function! s:currentOS()
   let os = substitute(system('uname'), '\n', '', '')
-  if has("gui_mac") || os == 'Darwin'
-    return 'pbcopy'
+  let known_os = 'unknown'
+  if has("gui_mac") || os ==? 'Darwin'
+    let known_os = s:mac
   elseif has("gui_win32")
-    return 'clip'
+    let known_os = s:windows
+  elseif os ==? 'Linux'
+    let known_os = s:linux
   else
+    exe "normal \<Esc>"
+    throw "unknown OS: " . os
+  endif
+  return known_os
+endfunction
+
+function! s:CopyCommandForCurrentOS()
+  let os = <SID>currentOS()
+  if os == s:mac
+    return 'pbcopy'
+  elseif os == s:windows
+    return 'clip'
+  elseif os == s:linux
     return 'xsel --clipboard --input'
   endif
 endfunction
 
+function! s:PasteCommandForCurrentOS()
+  let os = <SID>currentOS()
+  if os == s:mac
+    return 'pbpaste'
+  elseif os == s:windows
+    return 'paste'
+  elseif os == s:linux
+    return 'xsel --clipboard --output'
+  endif
+endfunction
+
 xnoremap <silent> <Plug>SystemCopy :<C-U>call <SID>system_copy(visualmode(),visualmode() ==# 'V' ? 1 : 0)<CR>
 nnoremap <silent> <Plug>SystemCopy :<C-U>set opfunc=<SID>system_copy<CR>g@
 nnoremap <silent> <Plug>SystemCopyLine :<C-U>set opfunc=<SID>system_copy<Bar>exe 'norm! 'v:count1.'g@_'<CR>
+nnoremap <silent> <Plug>SystemPaste :<C-U>call <SID>system_paste()<CR>
 
 if !hasmapto('<Plug>SystemCopy') || maparg('cp','n') ==# ''
   xmap cp <Plug>SystemCopy
   nmap cp <Plug>SystemCopy
   nmap cP <Plug>SystemCopyLine
 endif
+
+if !hasmapto('<Plug>SystemPaste') || maparg('cv','n') ==# ''
+  nmap cv <Plug>SystemPaste
+endif