vim: MRU++

etc/soft/vim/vim/+plugins/MRU/plugin/mru.vim

@@ -1,14 +1,14 @@
 " File: mru.vim
 " Author: Yegappan Lakshmanan (yegappan AT yahoo DOT com)
-" Version: 3.5
-" Last Modified: May 8, 2013
-" Copyright: Copyright (C) 2003-2013 Yegappan Lakshmanan
-"            Permission is hereby granted to use and distribute this code,
+" Version: 3.8
+" Last Modified: March 5, 2014
+" Copyright: Copyright (C) 2003-2014 Yegappan Lakshmanan
+" License:   Permission is hereby granted to use and distribute this code,
 "            with or without modifications, provided that this copyright
 "            notice is copied with it. Like anything else that's free,
 "            mru.vim is provided *as is* and comes with no warranty of any
 "            kind, either expressed or implied. In no event will the copyright
-"            holder be liable for any damamges resulting from the use of this
+"            holder be liable for any damages resulting from the use of this
 "            software.
 "
 " Overview
@@ -25,6 +25,10 @@
 " The recently used filenames are stored in a file specified by the Vim
 " MRU_File variable.
 "
+" The Github repository for the MRU plugin is available at:
+"
+"	http://github.com/yegappan/mru
+"
 " Installation
 " ------------
 " 1. Copy the mru.vim file to one of the following directories:
@@ -75,7 +79,8 @@
 " some other plugin, then the file is opened in a new window.
 "
 " You can press the 'o' key to open the file name under the cursor in the
-" MRU window in a new window.
+" MRU window in a new window. You can also press <Shift-Enter> instead of 'o'
+" to open the file in a new window.
 "
 " To open a file from the MRU window in read-only mode (view), press the 'v'
 " key.
@@ -85,15 +90,16 @@
 " the cursor is moved to that tab. Otherwise, a new tab is opened.
 "
 " You can open multiple files from the MRU window by specifying a count before
-" pressing '<Enter>' or 'v' or 'o' or 't'. You can also visually select
-" multiple filenames and invoke the commands to open the files. Each selected
-" file will be opened in a separate window or tab.
+" pressing '<Enter>' or 'v' or 'o' or 't'. You can also visually (using
+" linewise visual mode) select multiple filenames and invoke the commands to
+" open the files. Each selected file will be opened in a separate window or
+" tab.
 "
 " You can press the 'u' key in the MRU window to update the file list. This is
 " useful if you keep the MRU window open always.
 "
-" You can close the MRU window by pressing the 'q' key or using one of the Vim
-" window commands.
+" You can close the MRU window by pressing the 'q' key or the <Esc> key or
+" using one of the Vim window commands.
 "
 " To display only files matching a pattern from the MRU list in the MRU
 " window, you can specify a pattern to the ":MRU" command. For example, to
@@ -118,6 +124,16 @@
 " list. When you have multiple instances of Vim running at the same time, the
 " latest MRU list will show up in all the instances of Vim.
 "
+" The MRUFilename syntax group is used to highlight the file names in the MRU
+" window. By default, this syntax group is linked to the Identifier highlight
+" group. You can change the highlight group by adding the following line in
+" your .vimrc:
+"
+"    highlight link MRUFileName LineNr
+"
+" The MRU buffer uses the 'mru file type. You can use this file type to add
+" custom auto commands, syntax highlighting, etc.
+"
 " Configuration
 " -------------
 " By changing the following variables you can configure the behavior of this
@@ -203,6 +219,16 @@
 "
 "       let MRU_Max_Submenu_Entries = 15
 "
+" In the MRU window, the filenames are displayed in two parts. The first part
+" contains the file name without the path and the second part contains the
+" full path to the file in parenthesis. This format is controlled by the
+" MRU_Filename_Format variable. If you prefer to change this to some other
+" format, then you can modify the MRU_Filename_Format variable. For example,
+" to display the full path without splitting it, you can set this variable
+" as shown below:
+"
+"       let MRU_Filename_Format={'formatter':'v:val', 'parser':'.*'}
+"
 " ****************** Do not modify after this line ************************
 if exists('loaded_mru')
     finish
@@ -296,6 +322,19 @@ if !exists('MRU_Open_File_Use_Tabs')
     let MRU_Open_File_Use_Tabs = 0
 endif
 
+" Format of the file names displayed in the MRU window.
+" The default is to display the filename followed by the complete path to the
+" file in parenthesis. This variable controls the expressions used to format
+" and parse the path. This can be changed to display the filenames in a
+" different format. The 'formatter' specifies how to split/format the filename
+" and 'parser' specifies how to read the filename back.
+if !exists('MRU_Filename_Format')
+    let MRU_Filename_Format = {
+        \   'formatter': 'fnamemodify(v:val, ":t") . " (" . v:val . ")"',
+        \   'parser': '(\zs.*\ze)'
+        \}
+endif
+
 " Control to temporarily lock the MRU list. Used to prevent files from
 " getting added to the MRU list when the ':vimgrep' command is executed.
 let s:mru_list_locked = 0
@@ -419,7 +458,11 @@ endfunction
 " that should be escaped (for security reasons)
 let s:esc_filename_chars = ' *?[{`$%#"|!<>();&' . "'\t\n"
 function! s:MRU_escape_filename(fname)
-    return escape(a:fname, s:esc_filename_chars)
+    if exists("*fnameescape")
+        return fnameescape(a:fname)
+    else
+        return escape(a:fname, s:esc_filename_chars)
+    endif
 endfunction
 
 " MRU_Edit_File                         {{{1
@@ -503,8 +546,7 @@ endfunction
 "               'edit' - Edit the file as a regular file
 "   multi     : Specifies  whether a single file or multiple files need to be
 "               opened.
-"   open_type : Specifies where to open the file. Can be one of 'useopen' or
-"               'newwin' or 'newtab'.
+"   open_type : Specifies where to open the file.
 "               useopen - If the file is already present in a window, then
 "                         jump to that window.  Otherwise, open the file in
 "                         the previous window.
@@ -512,21 +554,25 @@ endfunction
 "               newwin_vert - Open the file in a new vertical window.
 "               newtab  - Open the file in a new tab. If the file is already
 "                         opened in a tab, then jump to that tab.
+"               preview - Open the file in the preview window
 function! s:MRU_Window_Edit_File(fname, multi, edit_type, open_type)
     let esc_fname = s:MRU_escape_filename(a:fname)
 
-    if a:open_type == 'newwin_horiz'
+    if a:open_type ==# 'newwin_horiz'
         " Edit the file in a new horizontally split window above the previous
         " window
         wincmd p
         exe 'belowright new ' . esc_fname
-    elseif a:open_type == 'newwin_vert'
+    elseif a:open_type ==# 'newwin_vert'
         " Edit the file in a new vertically split window above the previous
         " window
         wincmd p
         exe 'belowright vnew ' . esc_fname
-    elseif a:open_type == 'newtab' || g:MRU_Open_File_Use_Tabs
+    elseif a:open_type ==# 'newtab' || g:MRU_Open_File_Use_Tabs
 	call s:MRU_Open_File_In_Tab(a:fname, esc_fname)
+    elseif a:open_type ==# 'preview'
+        " Edit the file in the preview window
+        exe 'topleft pedit ' . esc_fname
     else
         " If the selected file is already open in one of the windows,
         " jump to it
@@ -572,13 +618,13 @@ function! s:MRU_Window_Edit_File(fname, multi, edit_type, open_type)
             if split_window
                 " Current buffer has unsaved changes or is a special buffer or
                 " is the preview window.  So open the file in a new window
-                if a:edit_type == 'edit'
+                if a:edit_type ==# 'edit'
                     exe 'split ' . esc_fname
                 else
                     exe 'sview ' . esc_fname
                 endif
             else
-                if a:edit_type == 'edit'
+                if a:edit_type ==# 'edit'
                     exe 'edit ' . esc_fname
                 else
                     exe 'view ' . esc_fname
@@ -619,7 +665,7 @@ function! s:MRU_Select_File_Cmd(opt) range
         endif
 
         " The text in the MRU window contains the filename in parenthesis
-        let file = matchstr(f, '(\zs.*\ze)')
+        let file = matchstr(f, g:MRU_Filename_Format.parser)
 
         call s:MRU_Window_Edit_File(file, multi, edit_type, open_type)
 
@@ -668,8 +714,6 @@ function! s:MRU_Open_Window(...)
             exe winnum . 'wincmd w'
         endif
 
-        setlocal modifiable
-
         " Delete the contents of the buffer to the black-hole register
         silent! %delete _
     else
@@ -707,12 +751,17 @@ function! s:MRU_Open_Window(...)
         endif
     endif
 
+    setlocal modifiable
+
     " Mark the buffer as scratch
     setlocal buftype=nofile
     setlocal bufhidden=delete
     setlocal noswapfile
     setlocal nowrap
     setlocal nobuflisted
+    " Set the 'filetype' to 'mru'. This allows the user to apply custom
+    " syntax highlighting or other changes to the MRU bufer.
+    setlocal filetype=mru
     " Use fixed height for the MRU window
     setlocal winfixheight
 
@@ -729,6 +778,10 @@ function! s:MRU_Open_Window(...)
                 \ :call <SID>MRU_Select_File_Cmd('edit,newwin_horiz')<CR>
     vnoremap <buffer> <silent> o
                 \ :call <SID>MRU_Select_File_Cmd('edit,newwin_horiz')<CR>
+    nnoremap <buffer> <silent> <S-CR>
+                \ :call <SID>MRU_Select_File_Cmd('edit,newwin_horiz')<CR>
+    vnoremap <buffer> <silent> <S-CR>
+                \ :call <SID>MRU_Select_File_Cmd('edit,newwin_horiz')<CR>
     nnoremap <buffer> <silent> O
                 \ :call <SID>MRU_Select_File_Cmd('edit,newwin_vert')<CR>
     vnoremap <buffer> <silent> O
@@ -739,10 +792,19 @@ function! s:MRU_Open_Window(...)
                 \ :call <SID>MRU_Select_File_Cmd('edit,newtab')<CR>
     nnoremap <buffer> <silent> v
                 \ :call <SID>MRU_Select_File_Cmd('view,useopen')<CR>
+    nnoremap <buffer> <silent> p
+                \ :call <SID>MRU_Select_File_Cmd('view,preview')<CR>
+    vnoremap <buffer> <silent> p
+                \ :<C-u>if line("'<") == line("'>")<Bar>
+                \     call <SID>MRU_Select_File_Cmd('open,preview')<Bar>
+                \ else<Bar>
+                \     echoerr "Only a single file can be previewed"<Bar>
+                \ endif<CR>
     nnoremap <buffer> <silent> u :MRU<CR>
     nnoremap <buffer> <silent> <2-LeftMouse>
                 \ :call <SID>MRU_Select_File_Cmd('edit,useopen')<CR>
     nnoremap <buffer> <silent> q :close<CR>
+    nnoremap <buffer> <silent> <Esc> :close<CR>
 
     " Restore the previous cpoptions settings
     let &cpoptions = old_cpoptions
@@ -762,16 +824,20 @@ function! s:MRU_Open_Window(...)
     endif
 
     " Get the tail part of the file name (without the directory) and display
-    " it along with the full path
-    let  output = map(m, 'fnamemodify(v:val, ":t") . " (" . v:val . ")"')
+    " it along with the full path in parenthesis.
+    let  output = map(m, g:MRU_Filename_Format.formatter)
     silent! 0put =output
 
     " Delete the empty line at the end of the buffer
-    $delete
+    silent! $delete _
 
     " Move the cursor to the beginning of the file
     normal! gg
 
+    " Add syntax highlighting for the file names
+    syntax match MRUFileName '^.\{-}\ze('
+    highlight default link MRUFileName Identifier
+
     setlocal nomodifiable
 endfunction