Updated plugins

sources_non_forked/goyo.vim/plugin/goyo.vim

@@ -64,7 +64,7 @@ function! s:setup_pad(bufnr, vert, size)
   execute win . 'wincmd w'
   execute (a:vert ? 'vertical ' : '') . 'resize ' . max([0, a:size])
   augroup goyop
-    autocmd WinEnter <buffer> call s:blank()
+    autocmd WinEnter,CursorMoved <buffer> call s:blank()
   augroup END
 
   " To hide scrollbars of pad windows in GVim
@@ -127,6 +127,7 @@ function! s:goyo_on(width)
     \ { 'laststatus':     &laststatus,
     \   'showtabline':    &showtabline,
     \   'fillchars':      &fillchars,
+    \   'winminwidth':    &winminwidth,
     \   'winwidth':       &winwidth,
     \   'winminheight':   &winminheight,
     \   'winheight':      &winheight,
@@ -145,6 +146,12 @@ function! s:goyo_on(width)
     silent! GitGutterDisable
   endif
 
+  " vim-signify
+  let t:goyo_disabled_signify = exists('b:sy') && b:sy.active
+  if t:goyo_disabled_signify
+    SignifyToggle
+  endif
+
   " vim-airline
   let t:goyo_disabled_airline = exists("#airline")
   if t:goyo_disabled_airline
@@ -177,10 +184,10 @@ function! s:goyo_on(width)
   endif
 
   " Global options
-  set winwidth=1
   let &winheight = max([&winminheight, 1])
   set winminheight=1
   set winheight=1
+  set winminwidth=1 winwidth=1
   set laststatus=0
   set showtabline=0
   set noruler
@@ -241,6 +248,7 @@ function! s:goyo_off()
 
   let goyo_revert             = t:goyo_revert
   let goyo_disabled_gitgutter = t:goyo_disabled_gitgutter
+  let goyo_disabled_signify   = t:goyo_disabled_signify
   let goyo_disabled_airline   = t:goyo_disabled_airline
   let goyo_disabled_powerline = t:goyo_disabled_powerline
   let goyo_disabled_lightline = t:goyo_disabled_lightline
@@ -258,6 +266,10 @@ function! s:goyo_off()
     execute printf('normal! %dG%d|', line, col)
   endif
 
+  let wmw = remove(goyo_revert, 'winminwidth')
+  let ww  = remove(goyo_revert, 'winwidth')
+  let &winwidth     = ww
+  let &winminwidth  = wmw
   let wmh = remove(goyo_revert, 'winminheight')
   let wh  = remove(goyo_revert, 'winheight')
   let &winheight    = max([wmh, 1])
@@ -273,6 +285,12 @@ function! s:goyo_off()
     silent! GitGutterEnable
   endif
 
+  if goyo_disabled_signify
+    silent! if !b:sy.active
+      SignifyToggle
+    endif
+  endif
+
   if goyo_disabled_airline && !exists("#airline")
     AirlineToggle
     silent! AirlineRefresh
@@ -296,20 +314,26 @@ function! s:goyo_off()
   endif
 endfunction
 
-function! s:goyo(...)
+function! s:goyo(bang, ...)
   let width = a:0 > 0 ? a:1 : get(g:, 'goyo_width', 80)
 
-  if exists('#goyo') == 0
-    call s:goyo_on(width)
-  elseif a:0 > 0
-    let t:goyo_width = width
-    call s:resize_pads()
+  if a:bang
+    if exists('#goyo')
+      call s:goyo_off()
+    endif
   else
-    call s:goyo_off()
+    if exists('#goyo') == 0
+      call s:goyo_on(width)
+    elseif a:0 > 0
+      let t:goyo_width = width
+      call s:resize_pads()
+    else
+      call s:goyo_off()
+    end
   end
 endfunction
 
-command! -nargs=? Goyo call s:goyo(<args>)
+command! -nargs=? -bar -bang Goyo call s:goyo('<bang>' == '!', <args>)
 
 let &cpo = s:cpo_save
 unlet s:cpo_save

sources_non_forked/nerdtree/README.markdown

@@ -83,7 +83,7 @@ __Q. How can I open a NERDTree automatically when vim starts up if no files were
 A. Stick this in your vimrc
 
     autocmd StdinReadPre * let s:std_in=1
-    autocmd VimEnter * if !argc() == 0 && !exists("s:std_in") | NERDTree | endif
+    autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif
 
 __Q. How can I map a specific key or shortcut to open NERDTree?__
 

sources_non_forked/nerdtree/autoload/nerdtree/ui_glue.vim

@@ -0,0 +1,644 @@
+if exists("g:loaded_nerdtree_ui_glue_autoload")
+    finish
+endif
+let g:loaded_nerdtree_ui_glue_autoload = 1
+
+" FUNCTION: nerdtree#ui_glue#createDefaultBindings() {{{1
+function! nerdtree#ui_glue#createDefaultBindings()
+    let s = '<SNR>' . s:SID() . '_'
+
+    call NERDTreeAddKeyMap({ 'key': '<MiddleRelease>', 'scope': "all", 'callback': s."handleMiddleMouse" })
+    call NERDTreeAddKeyMap({ 'key': '<LeftRelease>', 'scope': "all", 'callback': s."handleLeftClick" })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': "DirNode", 'callback': s."activateDirNode" })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': "FileNode", 'callback': s."activateFileNode" })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': "Bookmark", 'callback': s."activateBookmark" })
+    call NERDTreeAddKeyMap({ 'key': '<2-LeftMouse>', 'scope': "all", 'callback': s."activateAll" })
+
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': "DirNode", 'callback': s."activateDirNode" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': "FileNode", 'callback': s."activateFileNode" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': "Bookmark", 'callback': s."activateBookmark" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapActivateNode, 'scope': "all", 'callback': s."activateAll" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenSplit, 'scope': "Node", 'callback': s."openHSplit" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenVSplit, 'scope': "Node", 'callback': s."openVSplit" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenSplit, 'scope': "Bookmark", 'callback': s."openHSplit" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenVSplit, 'scope': "Bookmark", 'callback': s."openVSplit" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreview, 'scope': "Node", 'callback': s."previewNodeCurrent" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewVSplit, 'scope': "Node", 'callback': s."previewNodeVSplit" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewSplit, 'scope': "Node", 'callback': s."previewNodeHSplit" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreview, 'scope': "Bookmark", 'callback': s."previewNodeCurrent" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewVSplit, 'scope': "Bookmark", 'callback': s."previewNodeVSplit" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapPreviewSplit, 'scope': "Bookmark", 'callback': s."previewNodeHSplit" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenRecursively, 'scope': "DirNode", 'callback': s."openNodeRecursively" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapUpdir, 'scope': "all", 'callback': s."upDirCurrentRootClosed" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapUpdirKeepOpen, 'scope': "all", 'callback': s."upDirCurrentRootOpen" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapChangeRoot, 'scope': "Node", 'callback': s."chRoot" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapChdir, 'scope': "Node", 'callback': s."chCwd" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapQuit, 'scope': "all", 'callback': s."closeTreeWindow" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCWD, 'scope': "all", 'callback': "nerdtree#ui_glue#chRootCwd" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapRefreshRoot, 'scope': "all", 'callback': s."refreshRoot" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapRefresh, 'scope': "Node", 'callback': s."refreshCurrent" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapHelp, 'scope': "all", 'callback': s."displayHelp" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleZoom, 'scope': "all", 'callback': s."toggleZoom" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleHidden, 'scope': "all", 'callback': s."toggleShowHidden" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleFilters, 'scope': "all", 'callback': s."toggleIgnoreFilter" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleFiles, 'scope': "all", 'callback': s."toggleShowFiles" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapToggleBookmarks, 'scope': "all", 'callback': s."toggleShowBookmarks" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCloseDir, 'scope': "Node", 'callback': s."closeCurrentDir" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapCloseChildren, 'scope': "DirNode", 'callback': s."closeChildren" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapMenu, 'scope': "Node", 'callback': s."showMenu" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpParent, 'scope': "Node", 'callback': s."jumpToParent" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpFirstChild, 'scope': "Node", 'callback': s."jumpToFirstChild" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpLastChild, 'scope': "Node", 'callback': s."jumpToLastChild" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpRoot, 'scope': "all", 'callback': s."jumpToRoot" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpNextSibling, 'scope': "Node", 'callback': s."jumpToNextSibling" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapJumpPrevSibling, 'scope': "Node", 'callback': s."jumpToPrevSibling" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTab, 'scope': "Node", 'callback': s."openInNewTab" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTabSilent, 'scope': "Node", 'callback': s."openInNewTabSilent" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTab, 'scope': "Bookmark", 'callback': s."openInNewTab" })
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenInTabSilent, 'scope': "Bookmark", 'callback': s."openInNewTabSilent" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapOpenExpl, 'scope': "DirNode", 'callback': s."openExplorer" })
+
+    call NERDTreeAddKeyMap({ 'key': g:NERDTreeMapDeleteBookmark, 'scope': "Bookmark", 'callback': s."deleteBookmark" })
+endfunction
+
+
+"SECTION: Interface bindings {{{1
+"============================================================
+
+"FUNCTION: s:activateAll() {{{1
+"handle the user activating the updir line
+function! s:activateAll()
+    if getline(".") ==# nerdtree#treeUpDirLine()
+        return nerdtree#ui_glue#upDir(0)
+    endif
+endfunction
+
+"FUNCTION: s:activateDirNode() {{{1
+"handle the user activating a tree node
+function! s:activateDirNode(node)
+    call a:node.activate({'reuse': 1})
+endfunction
+
+"FUNCTION: s:activateFileNode() {{{1
+"handle the user activating a tree node
+function! s:activateFileNode(node)
+    call a:node.activate({'reuse': 1, 'where': 'p'})
+endfunction
+
+"FUNCTION: s:activateBookmark() {{{1
+"handle the user activating a bookmark
+function! s:activateBookmark(bm)
+    call a:bm.activate(!a:bm.path.isDirectory ? {'where': 'p'} : {})
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#bookmarkNode(name) {{{1
+" Associate the current node with the given name
+function! nerdtree#ui_glue#bookmarkNode(...)
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    if currentNode != {}
+        let name = a:1
+        if empty(name)
+            let name = currentNode.path.getLastPathComponent(0)
+        endif
+        try
+            call currentNode.bookmark(name)
+            call b:NERDTree.render()
+        catch /^NERDTree.IllegalBookmarkNameError/
+            call nerdtree#echo("bookmark names must not contain spaces")
+        endtry
+    else
+        call nerdtree#echo("select a node first")
+    endif
+endfunction
+
+" FUNCTION: s:chCwd(node) {{{1
+function! s:chCwd(node)
+    try
+        call a:node.path.changeToDir()
+    catch /^NERDTree.PathChangeError/
+        call nerdtree#echoWarning("could not change cwd")
+    endtry
+endfunction
+
+" FUNCTION: s:chRoot(node) {{{1
+" changes the current root to the selected one
+function! s:chRoot(node)
+    call a:node.makeRoot()
+    call b:NERDTree.render()
+    call b:NERDTreeRoot.putCursorHere(0, 0)
+endfunction
+
+" FUNCTION: s:nerdtree#ui_glue#chRootCwd() {{{1
+" changes the current root to CWD
+function! nerdtree#ui_glue#chRootCwd()
+    try
+        let cwd = g:NERDTreePath.New(getcwd())
+    catch /^NERDTree.InvalidArgumentsError/
+        call nerdtree#echo("current directory does not exist.")
+        return
+    endtry
+    if cwd.str() == g:NERDTreeFileNode.GetRootForTab().path.str()
+       return
+    endif
+    call s:chRoot(g:NERDTreeDirNode.New(cwd))
+endfunction
+
+" FUNCTION: nnerdtree#ui_glue#clearBookmarks(bookmarks) {{{1
+function! nerdtree#ui_glue#clearBookmarks(bookmarks)
+    if a:bookmarks ==# ''
+        let currentNode = g:NERDTreeFileNode.GetSelected()
+        if currentNode != {}
+            call currentNode.clearBookmarks()
+        endif
+    else
+        for name in split(a:bookmarks, ' ')
+            let bookmark = g:NERDTreeBookmark.BookmarkFor(name)
+            call bookmark.delete()
+        endfor
+    endif
+    call b:NERDTree.render()
+endfunction
+
+" FUNCTION: s:closeChildren(node) {{{1
+" closes all childnodes of the current node
+function! s:closeChildren(node)
+    call a:node.closeChildren()
+    call b:NERDTree.render()
+    call a:node.putCursorHere(0, 0)
+endfunction
+
+" FUNCTION: s:closeCurrentDir(node) {{{1
+" closes the parent dir of the current node
+function! s:closeCurrentDir(node)
+    let parent = a:node.parent
+    if parent ==# {} || parent.isRoot()
+        call nerdtree#echo("cannot close tree root")
+    else
+        while g:NERDTreeCascadeOpenSingleChildDir && !parent.parent.isRoot()
+            if parent.parent.getVisibleChildCount() == 1
+                call parent.close()
+                let parent = parent.parent
+            else
+                break
+            endif
+        endwhile
+        call parent.close()
+        call b:NERDTree.render()
+        call parent.putCursorHere(0, 0)
+    endif
+endfunction
+
+" FUNCTION: s:closeTreeWindow() {{{1
+" close the tree window
+function! s:closeTreeWindow()
+    if b:NERDTreeType ==# "secondary" && b:NERDTreePreviousBuf != -1
+        exec "buffer " . b:NERDTreePreviousBuf
+    else
+        if winnr("$") > 1
+            call nerdtree#closeTree()
+        else
+            call nerdtree#echo("Cannot close last window")
+        endif
+    endif
+endfunction
+
+" FUNCTION: s:deleteBookmark(bm) {{{1
+" if the cursor is on a bookmark, prompt to delete
+function! s:deleteBookmark(bm)
+    echo  "Are you sure you wish to delete the bookmark:\n\"" . a:bm.name . "\" (yN):"
+
+    if  nr2char(getchar()) ==# 'y'
+        try
+            call a:bm.delete()
+            call b:NERDTree.render()
+            redraw
+        catch /^NERDTree/
+            call nerdtree#echoWarning("Could not remove bookmark")
+        endtry
+    else
+        call nerdtree#echo("delete aborted" )
+    endif
+
+endfunction
+
+" FUNCTION: s:displayHelp() {{{1
+" toggles the help display
+function! s:displayHelp()
+    let b:treeShowHelp = b:treeShowHelp ? 0 : 1
+    call b:NERDTree.render()
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:findAndRevealPath() {{{1
+function! s:findAndRevealPath()
+    try
+        let p = g:NERDTreePath.New(expand("%:p"))
+    catch /^NERDTree.InvalidArgumentsError/
+        call nerdtree#echo("no file for the current buffer")
+        return
+    endtry
+
+    if p.isUnixHiddenPath()
+        let showhidden=g:NERDTreeShowHidden
+        let g:NERDTreeShowHidden = 1
+    endif
+
+    if !g:NERDTree.ExistsForTab()
+        try
+            let cwd = g:NERDTreePath.New(getcwd())
+        catch /^NERDTree.InvalidArgumentsError/
+            call nerdtree#echo("current directory does not exist.")
+            let cwd = p.getParent()
+        endtry
+
+        if p.isUnder(cwd)
+            call g:NERDTreeCreator.CreatePrimary(cwd.str())
+        else
+            call g:NERDTreeCreator.CreatePrimary(p.getParent().str())
+        endif
+    else
+        if !p.isUnder(g:NERDTreeFileNode.GetRootForTab().path)
+            if !nerdtree#isTreeOpen()
+                call g:NERDTreeCreator.TogglePrimary('')
+            else
+                call nerdtree#putCursorInTreeWin()
+            endif
+            let b:NERDTreeShowHidden = g:NERDTreeShowHidden
+            call s:chRoot(g:NERDTreeDirNode.New(p.getParent()))
+        else
+            if !nerdtree#isTreeOpen()
+                call g:NERDTreeCreator.TogglePrimary("")
+            endif
+        endif
+    endif
+    call nerdtree#putCursorInTreeWin()
+    call b:NERDTreeRoot.reveal(p)
+
+    if p.isUnixHiddenFile()
+        let g:NERDTreeShowHidden = showhidden
+    endif
+endfunction
+
+"FUNCTION: s:handleLeftClick() {{{1
+"Checks if the click should open the current node
+function! s:handleLeftClick()
+    let currentNode = g:NERDTreeFileNode.GetSelected()
+    if currentNode != {}
+
+        "the dir arrows are multibyte chars, and vim's string functions only
+        "deal with single bytes - so split the line up with the hack below and
+        "take the line substring manually
+        let line = split(getline(line(".")), '\zs')
+        let startToCur = ""
+        for i in range(0,len(line)-1)
+            let startToCur .= line[i]
+        endfor
+
+        if currentNode.path.isDirectory
+            if startToCur =~# nerdtree#treeMarkupReg() && startToCur =~# '[+~▾▸] \?$'
+                call currentNode.activate()
+                return
+            endif
+        endif
+
+        if (g:NERDTreeMouseMode ==# 2 && currentNode.path.isDirectory) || g:NERDTreeMouseMode ==# 3
+            let char = strpart(startToCur, strlen(startToCur)-1, 1)
+            if char !~# nerdtree#treeMarkupReg()
+                if currentNode.path.isDirectory
+                    call currentNode.activate()
+                else
+                    call currentNode.activate({'reuse': 1, 'where': 'p'})
+                endif
+                return
+            endif
+        endif
+    endif
+endfunction
+
+" FUNCTION: s:handleMiddleMouse() {{{1
+function! s:handleMiddleMouse()
+    let curNode = g:NERDTreeFileNode.GetSelected()
+    if curNode ==# {}
+        call nerdtree#echo("Put the cursor on a node first" )
+        return
+    endif
+
+    if curNode.path.isDirectory
+        call nerdtree#openExplorer(curNode)
+    else
+        call curNode.open({'where': 'h'})
+    endif
+endfunction
+
+" FUNCTION: s:jumpToChild(direction) {{{2
+" Args:
+" direction: 0 if going to first child, 1 if going to last
+function! s:jumpToChild(currentNode, direction)
+    if a:currentNode.isRoot()
+        return nerdtree#echo("cannot jump to " . (a:direction ? "last" : "first") .  " child")
+    end
+    let dirNode = a:currentNode.parent
+    let childNodes = dirNode.getVisibleChildren()
+
+    let targetNode = childNodes[0]
+    if a:direction
+        let targetNode = childNodes[len(childNodes) - 1]
+    endif
+
+    if targetNode.equals(a:currentNode)
+        let siblingDir = a:currentNode.parent.findOpenDirSiblingWithVisibleChildren(a:direction)
+        if siblingDir != {}
+            let indx = a:direction ? siblingDir.getVisibleChildCount()-1 : 0
+            let targetNode = siblingDir.getChildByIndex(indx, 1)
+        endif
+    endif
+
+    call targetNode.putCursorHere(1, 0)
+
+    call b:NERDTree.ui.centerView()
+endfunction
+
+
+" FUNCTION: nerdtree#ui_glue#invokeKeyMap(key) {{{1
+"this is needed since I cant figure out how to invoke dict functions from a
+"key map
+function! nerdtree#ui_glue#invokeKeyMap(key)
+    call g:NERDTreeKeyMap.Invoke(a:key)
+endfunction
+
+" FUNCTION: s:jumpToFirstChild() {{{1
+" wrapper for the jump to child method
+function! s:jumpToFirstChild(node)
+    call s:jumpToChild(a:node, 0)
+endfunction
+
+" FUNCTION: s:jumpToLastChild() {{{1
+" wrapper for the jump to child method
+function! s:jumpToLastChild(node)
+    call s:jumpToChild(a:node, 1)
+endfunction
+
+" FUNCTION: s:jumpToParent(node) {{{1
+" moves the cursor to the parent of the current node
+function! s:jumpToParent(node)
+    if !empty(a:node.parent)
+        call a:node.parent.putCursorHere(1, 0)
+        call b:NERDTree.ui.centerView()
+    else
+        call nerdtree#echo("cannot jump to parent")
+    endif
+endfunction
+
+" FUNCTION: s:jumpToRoot() {{{1
+" moves the cursor to the root node
+function! s:jumpToRoot()
+    call b:NERDTreeRoot.putCursorHere(1, 0)
+    call b:NERDTree.ui.centerView()
+endfunction
+
+" FUNCTION: s:jumpToNextSibling(node) {{{1
+function! s:jumpToNextSibling(node)
+    call s:jumpToSibling(a:node, 1)
+endfunction
+
+" FUNCTION: s:jumpToPrevSibling(node) {{{1
+function! s:jumpToPrevSibling(node)
+    call s:jumpToSibling(a:node, 0)
+endfunction
+
+" FUNCTION: s:jumpToSibling(currentNode, forward) {{{2
+" moves the cursor to the sibling of the current node in the given direction
+"
+" Args:
+" forward: 1 if the cursor should move to the next sibling, 0 if it should
+" move back to the previous sibling
+function! s:jumpToSibling(currentNode, forward)
+    let sibling = a:currentNode.findSibling(a:forward)
+
+    if !empty(sibling)
+        call sibling.putCursorHere(1, 0)
+        call b:NERDTree.ui.centerView()
+    endif
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#openBookmark(name) {{{1
+" put the cursor on the given bookmark and, if its a file, open it
+function! nerdtree#ui_glue#openBookmark(name)
+    try
+        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0)
+        call targetNode.putCursorHere(0, 1)
+        redraw!
+    catch /^NERDTree.BookmarkedNodeNotFoundError/
+        call nerdtree#echo("note - target node is not cached")
+        let bookmark = g:NERDTreeBookmark.BookmarkFor(a:name)
+        let targetNode = g:NERDTreeFileNode.New(bookmark.path)
+    endtry
+    if targetNode.path.isDirectory
+        call targetNode.openExplorer()
+    else
+        call targetNode.open({'where': 'p'})
+    endif
+endfunction
+
+" FUNCTION: s:openHSplit(target) {{{1
+function! s:openHSplit(target)
+    call a:target.activate({'where': 'h'})
+endfunction
+
+" FUNCTION: s:openVSplit(target) {{{1
+function! s:openVSplit(target)
+    call a:target.activate({'where': 'v'})
+endfunction
+
+" FUNCTION: s:openExplorer(node) {{{1
+function! s:openExplorer(node)
+    call a:node.openExplorer()
+endfunction
+
+" FUNCTION: s:openInNewTab(target) {{{1
+function! s:openInNewTab(target)
+    call a:target.activate({'where': 't'})
+endfunction
+
+" FUNCTION: s:openInNewTabSilent(target) {{{1
+function! s:openInNewTabSilent(target)
+    call a:target.activate({'where': 't', 'stay': 1})
+endfunction
+
+" FUNCTION: s:openNodeRecursively(node) {{{1
+function! s:openNodeRecursively(node)
+    call nerdtree#echo("Recursively opening node. Please wait...")
+    call a:node.openRecursively()
+    call b:NERDTree.render()
+    redraw
+    call nerdtree#echo("Recursively opening node. Please wait... DONE")
+endfunction
+
+"FUNCTION: s:previewNodeCurrent(node) {{{1
+function! s:previewNodeCurrent(node)
+    call a:node.open({'stay': 1, 'where': 'p', 'keepopen': 1})
+endfunction
+
+"FUNCTION: s:previewNodeHSplit(node) {{{1
+function! s:previewNodeHSplit(node)
+    call a:node.open({'stay': 1, 'where': 'h', 'keepopen': 1})
+endfunction
+
+"FUNCTION: s:previewNodeVSplit(node) {{{1
+function! s:previewNodeVSplit(node)
+    call a:node.open({'stay': 1, 'where': 'v', 'keepopen': 1})
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#revealBookmark(name) {{{1
+" put the cursor on the node associate with the given name
+function! nerdtree#ui_glue#revealBookmark(name)
+    try
+        let targetNode = g:NERDTreeBookmark.GetNodeForName(a:name, 0)
+        call targetNode.putCursorHere(0, 1)
+    catch /^NERDTree.BookmarkNotFoundError/
+        call nerdtree#echo("Bookmark isnt cached under the current root")
+    endtry
+endfunction
+
+" FUNCTION: s:refreshRoot() {{{1
+" Reloads the current root. All nodes below this will be lost and the root dir
+" will be reloaded.
+function! s:refreshRoot()
+    call nerdtree#echo("Refreshing the root node. This could take a while...")
+    call b:NERDTreeRoot.refresh()
+    call b:NERDTree.render()
+    redraw
+    call nerdtree#echo("Refreshing the root node. This could take a while... DONE")
+endfunction
+
+" FUNCTION: s:refreshCurrent(node) {{{1
+" refreshes the root for the current node
+function! s:refreshCurrent(node)
+    let node = a:node
+    if !node.path.isDirectory
+        let node = node.parent
+    endif
+
+    call nerdtree#echo("Refreshing node. This could take a while...")
+    call node.refresh()
+    call b:NERDTree.render()
+    redraw
+    call nerdtree#echo("Refreshing node. This could take a while... DONE")
+endfunction
+
+" FUNCTION: nerdtree#ui_glue#setupCommands() {{{1
+function! nerdtree#ui_glue#setupCommands()
+    command! -n=? -complete=dir -bar NERDTree :call g:NERDTreeCreator.CreatePrimary('<args>')
+    command! -n=? -complete=dir -bar NERDTreeToggle :call g:NERDTreeCreator.TogglePrimary('<args>')
+    command! -n=0 -bar NERDTreeClose :call nerdtree#closeTreeIfOpen()
+    command! -n=1 -complete=customlist,nerdtree#completeBookmarks -bar NERDTreeFromBookmark call g:NERDTreeCreator.CreatePrimary('<args>')
+    command! -n=0 -bar NERDTreeMirror call g:NERDTreeCreator.CreateMirror()
+    command! -n=0 -bar NERDTreeFind call s:findAndRevealPath()
+    command! -n=0 -bar NERDTreeFocus call NERDTreeFocus()
+    command! -n=0 -bar NERDTreeCWD call NERDTreeCWD()
+endfunction
+
+" Function: s:SID()   {{{1
+function s:SID()
+    if !exists("s:sid")
+        let s:sid = matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze_SID$')
+    endif
+    return s:sid
+endfun
+
+" FUNCTION: s:showMenu(node) {{{1
+function! s:showMenu(node)
+    let mc = g:NERDTreeMenuController.New(g:NERDTreeMenuItem.AllEnabled())
+    call mc.showMenu()
+endfunction
+
+" FUNCTION: s:toggleIgnoreFilter() {{{1
+function! s:toggleIgnoreFilter()
+    call b:NERDTree.ui.toggleIgnoreFilter()
+endfunction
+
+" FUNCTION: s:toggleShowBookmarks() {{{1
+function! s:toggleShowBookmarks()
+    call b:NERDTree.ui.toggleShowBookmarks()
+endfunction
+
+" FUNCTION: s:toggleShowFiles() {{{1
+function! s:toggleShowFiles()
+    call b:NERDTree.ui.toggleShowFiles()
+endfunction
+
+" FUNCTION: s:toggleShowHidden() {{{1
+" toggles the display of hidden files
+function! s:toggleShowHidden()
+    call b:NERDTree.ui.toggleShowHidden()
+endfunction
+
+" FUNCTION: s:toggleZoom() {{{1
+function! s:toggleZoom()
+    call b:NERDTree.ui.toggleZoom()
+endfunction
+
+"FUNCTION: nerdtree#ui_glue#upDir(keepState) {{{1
+"moves the tree up a level
+"
+"Args:
+"keepState: 1 if the current root should be left open when the tree is
+"re-rendered
+function! nerdtree#ui_glue#upDir(keepState)
+    let cwd = b:NERDTreeRoot.path.str({'format': 'UI'})
+    if cwd ==# "/" || cwd =~# '^[^/]..$'
+        call nerdtree#echo("already at top dir")
+    else
+        if !a:keepState
+            call b:NERDTreeRoot.close()
+        endif
+
+        let oldRoot = b:NERDTreeRoot
+
+        if empty(b:NERDTreeRoot.parent)
+            let path = b:NERDTreeRoot.path.getParent()
+            let newRoot = g:NERDTreeDirNode.New(path)
+            call newRoot.open()
+            call newRoot.transplantChild(b:NERDTreeRoot)
+            let b:NERDTreeRoot = newRoot
+        else
+            let b:NERDTreeRoot = b:NERDTreeRoot.parent
+        endif
+
+        if g:NERDTreeChDirMode ==# 2
+            call b:NERDTreeRoot.path.changeToDir()
+        endif
+
+        call b:NERDTree.render()
+        call oldRoot.putCursorHere(0, 0)
+    endif
+endfunction
+
+" FUNCTION: s:upDirCurrentRootOpen() {{{1
+function! s:upDirCurrentRootOpen()
+    call nerdtree#ui_glue#upDir(1)
+endfunction
+
+" FUNCTION: s:upDirCurrentRootClosed() {{{1
+function! s:upDirCurrentRootClosed()
+    call nerdtree#ui_glue#upDir(0)
+endfunction
+
+" vim: set sw=4 sts=4 et fdm=marker:

sources_non_forked/nerdtree/doc/NERD_tree.txt

@@ -1060,6 +1060,9 @@ NERDTreeAddKeyMap({options})                             *NERDTreeAddKeyMap()*
     "callback" - the function the new mapping will be bound to
     "quickhelpText" - the text that will appear in the quickhelp (see
     |NERDTree-?|)
+    "override" - if 1 then this new mapping will override whatever previous
+    mapping was defined for the key/scope combo. Useful for overriding the
+    default mappings.
 
     Additionally, a "scope" argument may be supplied. This constrains the
     mapping so that it is only activated if the cursor is on a certain object.

sources_non_forked/nerdtree/lib/nerdtree/bookmark.vim

@@ -275,7 +275,7 @@ function! s:Bookmark.toRoot()
             let targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path)
         endtry
         call targetNode.makeRoot()
-        call nerdtree#renderView()
+        call b:NERDTree.render()
         call targetNode.putCursorHere(0, 0)
     endif
 endfunction
@@ -293,7 +293,7 @@ function! s:Bookmark.validate()
         return 1
     else
         call s:Bookmark.CacheBookmarks(1)
-        call nerdtree#renderView()
+        call b:NERDTree.render()
         call nerdtree#echo(self.name . "now points to an invalid location. See :help NERDTreeInvalidBookmarks for info.")
         return 0
     endif

sources_non_forked/nerdtree/lib/nerdtree/creator.vim

@@ -7,18 +7,18 @@ let g:NERDTreeCreator = s:Creator
 
 "FUNCTION: s:Creator._bindMappings() {{{1
 function! s:Creator._bindMappings()
-    "make <cr> do the same as the default 'o' mapping
-    exec "nnoremap <silent> <buffer> <cr> :call nerdtree#invokeKeyMap('". g:NERDTreeMapActivateNode ."')<cr>"
+    "make <cr> do the same as the activate node mapping
+    nnoremap <silent> <buffer> <cr> :call nerdtree#ui_glue#invokeKeyMap(g:NERDTreeMapActivateNode)<cr>
 
     call g:NERDTreeKeyMap.BindAll()
 
-    command! -buffer -nargs=? Bookmark :call nerdtree#bookmarkNode('<args>')
-    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 RevealBookmark :call nerdtree#revealBookmark('<args>')
-    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 OpenBookmark :call nerdtree#openBookmark('<args>')
-    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=* ClearBookmarks call nerdtree#clearBookmarks('<args>')
+    command! -buffer -nargs=? Bookmark :call nerdtree#ui_glue#bookmarkNode('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 RevealBookmark :call nerdtree#ui_glue#revealBookmark('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=1 OpenBookmark :call nerdtree#ui_glue#openBookmark('<args>')
+    command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=* ClearBookmarks call nerdtree#ui_glue#clearBookmarks('<args>')
     command! -buffer -complete=customlist,nerdtree#completeBookmarks -nargs=+ BookmarkToRoot call g:NERDTreeBookmark.ToRoot('<args>')
-    command! -buffer -nargs=0 ClearAllBookmarks call g:NERDTreeBookmark.ClearAll() <bar> call nerdtree#renderView()
-    command! -buffer -nargs=0 ReadBookmarks call g:NERDTreeBookmark.CacheBookmarks(0) <bar> call nerdtree#renderView()
+    command! -buffer -nargs=0 ClearAllBookmarks call g:NERDTreeBookmark.ClearAll() <bar> call b:NERDTree.render()
+    command! -buffer -nargs=0 ReadBookmarks call g:NERDTreeBookmark.CacheBookmarks(0) <bar> call b:NERDTree.render()
     command! -buffer -nargs=0 WriteBookmarks call g:NERDTreeBookmark.Write()
 endfunction
 
@@ -49,26 +49,23 @@ function! s:Creator.createPrimary(name)
         call path.changeToDir()
     endif
 
-    if nerdtree#treeExistsForTab()
+    if g:NERDTree.ExistsForTab()
         if nerdtree#isTreeOpen()
             call nerdtree#closeTree()
         endif
         unlet t:NERDTreeBufName
     endif
 
-    let newRoot = g:NERDTreeDirNode.New(path)
-    call newRoot.open()
-
     call self._createTreeWin()
+    call self._createNERDTree(path)
+    let b:NERDTreeType = "primary"
     let b:treeShowHelp = 0
     let b:NERDTreeIgnoreEnabled = 1
     let b:NERDTreeShowFiles = g:NERDTreeShowFiles
     let b:NERDTreeShowHidden = g:NERDTreeShowHidden
     let b:NERDTreeShowBookmarks = g:NERDTreeShowBookmarks
-    let b:NERDTreeRoot = newRoot
-    let b:NERDTreeType = "primary"
 
-    call nerdtree#renderView()
+    call b:NERDTree.render()
     call b:NERDTreeRoot.putCursorHere(0, 0)
 
     call self._broadcastInitEvent()
@@ -99,18 +96,26 @@ function! s:Creator.createSecondary(dir)
     exec "silent edit " . self._nextBufferName()
 
     let b:NERDTreePreviousBuf = bufnr(previousBuf)
-
-    let b:NERDTreeRoot = g:NERDTreeDirNode.New(path)
-    call b:NERDTreeRoot.open()
-
+    call self._createNERDTree(path)
     call self._setCommonBufOptions()
     let b:NERDTreeType = "secondary"
 
-    call nerdtree#renderView()
+    call b:NERDTree.render()
 
     call self._broadcastInitEvent()
 endfunction
 
+" FUNCTION: s:Creator._createNERDTree(path) {{{1
+function! s:Creator._createNERDTree(path)
+    let b:NERDTree = g:NERDTree.New(a:path)
+    "TODO: This is kept for compatability only since many things use
+    "b:NERDTreeRoot instead of the new NERDTree.root
+    "Remove this one day
+    let b:NERDTreeRoot = b:NERDTree.root
+
+    call b:NERDTree.root.open()
+endfunction
+
 " FUNCTION: s:Creator.CreateMirror() {{{1
 function! s:Creator.CreateMirror()
     let creator = s:Creator.New()
@@ -122,12 +127,12 @@ function! s:Creator.createMirror()
     "get the names off all the nerd tree buffers
     let treeBufNames = []
     for i in range(1, tabpagenr("$"))
-        let nextName = nerdtree#tabpagevar(i, 'NERDTreeBufName')
+        let nextName = self._tabpagevar(i, 'NERDTreeBufName')
         if nextName != -1 && (!exists("t:NERDTreeBufName") || nextName != t:NERDTreeBufName)
             call add(treeBufNames, nextName)
         endif
     endfor
-    let treeBufNames = nerdtree#unique(treeBufNames)
+    let treeBufNames = self._uniq(treeBufNames)
 
     "map the option names (that the user will be prompted with) to the nerd
     "tree buffer names
@@ -158,7 +163,7 @@ function! s:Creator.createMirror()
         return
     endif
 
-    if nerdtree#treeExistsForTab() && nerdtree#isTreeOpen()
+    if g:NERDTree.ExistsForTab() && nerdtree#isTreeOpen()
         call nerdtree#closeTree()
     endif
 
@@ -166,7 +171,7 @@ function! s:Creator.createMirror()
     call self._createTreeWin()
     exec 'buffer ' .  bufferName
     if !&hidden
-        call nerdtree#renderView()
+        call b:NERDTree.render()
     endif
 endfunction
 
@@ -290,6 +295,24 @@ function! s:Creator._setupStatusline()
     endif
 endfunction
 
+" FUNCTION: s:Creator._tabpagevar(tabnr, var) {{{1
+function! s:Creator._tabpagevar(tabnr, var)
+    let currentTab = tabpagenr()
+    let old_ei = &ei
+    set ei=all
+
+    exec "tabnext " . a:tabnr
+    let v = -1
+    if exists('t:' . a:var)
+        exec 'let v = t:' . a:var
+    endif
+    exec "tabnext " . currentTab
+
+    let &ei = old_ei
+
+    return v
+endfunction
+
 "FUNCTION: s:Creator.TogglePrimary(dir) {{{1
 function! s:Creator.TogglePrimary(dir)
     let creator = s:Creator.New()
@@ -304,13 +327,13 @@ endfunction
 "dir: the full path for the root node (is only used if the NERD tree is being
 "initialized.
 function! s:Creator.togglePrimary(dir)
-    if nerdtree#treeExistsForTab()
+    if g:NERDTree.ExistsForTab()
         if !nerdtree#isTreeOpen()
             call self._createTreeWin()
             if !&hidden
-                call nerdtree#renderView()
+                call b:NERDTree.render()
             endif
-            call nerdtree#restoreScreenState()
+            call b:NERDTree.ui.restoreScreenState()
         else
             call nerdtree#closeTree()
         endif
@@ -319,4 +342,16 @@ function! s:Creator.togglePrimary(dir)
     endif
 endfunction
 
+" Function: s:Creator._uniq(list)   {{{1
+" returns a:list without duplicates
+function! s:Creator._uniq(list)
+  let uniqlist = []
+  for elem in a:list
+    if index(uniqlist, elem) ==# -1
+      let uniqlist += [elem]
+    endif
+  endfor
+  return uniqlist
+endfunction
+
 " vim: set sw=4 sts=4 et fdm=marker:

sources_non_forked/nerdtree/lib/nerdtree/event.vim

@@ -0,0 +1,13 @@
+"CLASS: Event
+"============================================================
+let s:Event = {}
+let g:NERDTreeEvent = s:Event
+
+function! s:Event.New(nerdtree, subject, action, params) abort
+    let newObj = copy(self)
+    let newObj.nerdtree = a:nerdtree
+    let newObj.subject = a:subject
+    let newObj.action = a:action
+    let newObj.params = a:params
+    return newObj
+endfunction

sources_non_forked/nerdtree/lib/nerdtree/flag_set.vim

@@ -0,0 +1,56 @@
+"CLASS: FlagSet
+"============================================================
+let s:FlagSet = {}
+let g:NERDTreeFlagSet = s:FlagSet
+
+"FUNCTION: FlagSet.addFlag(scope, flag) {{{1
+function! s:FlagSet.addFlag(scope, flag)
+    let flags = self._flagsForScope(a:scope)
+    if index(flags, a:flag) == -1
+        call add(flags, a:flag)
+    end
+endfunction
+
+"FUNCTION: FlagSet.clearFlags(scope) {{{1
+function! s:FlagSet.clearFlags(scope)
+    let self._flags[a:scope] = []
+endfunction
+
+"FUNCTION: FlagSet._flagsForScope(scope) {{{1
+function! s:FlagSet._flagsForScope(scope)
+    if !has_key(self._flags, a:scope)
+        let self._flags[a:scope] = []
+    endif
+    return self._flags[a:scope]
+endfunction
+
+"FUNCTION: FlagSet.New() {{{1
+function! s:FlagSet.New()
+    let newObj = copy(self)
+    let newObj._flags = {}
+    return newObj
+endfunction
+
+"FUNCTION: FlagSet.removeFlag(scope, flag) {{{1
+function! s:FlagSet.removeFlag(scope, flag)
+    let flags = self._flagsForScope(a:scope)
+
+    let i = index(flags, a:flag)
+    if i >= 0
+        call remove(flags, i)
+    endif
+endfunction
+
+"FUNCTION: FlagSet.renderToString() {{{1
+function! s:FlagSet.renderToString()
+    let flagstring = ""
+    for i in values(self._flags)
+        let flagstring .= join(i)
+    endfor
+
+    if len(flagstring) == 0
+        return ""
+    endif
+
+    return '[' . flagstring . ']'
+endfunction

sources_non_forked/nerdtree/lib/nerdtree/key_map.vim

@@ -44,7 +44,7 @@ function! s:KeyMap.bind()
 
     let premap = self.key == "<LeftRelease>" ? " <LeftRelease>" : " "
 
-    exec 'nnoremap <buffer> <silent> '. self.key . premap . ':call nerdtree#invokeKeyMap("'. keymapInvokeString .'")<cr>'
+    exec 'nnoremap <buffer> <silent> '. self.key . premap . ':call nerdtree#ui_glue#invokeKeyMap("'. keymapInvokeString .'")<cr>'
 endfunction
 
 "FUNCTION: KeyMap.Remove(key, scope) {{{1
@@ -79,6 +79,16 @@ endfunction
 "If a keymap has the scope of "all" then it will be called if no other keymap
 "is found for a:key and the scope.
 function! s:KeyMap.Invoke(key)
+
+    "required because clicking the command window below another window still
+    "invokes the <LeftRelease> mapping - but changes the window cursor
+    "is in first
+    "
+    "TODO: remove this check when the vim bug is fixed
+    if !g:NERDTree.ExistsForBuf()
+        return {}
+    endif
+
     let node = g:NERDTreeFileNode.GetSelected()
     if !empty(node)
 
@@ -124,8 +134,14 @@ endfunction
 
 "FUNCTION: KeyMap.Create(options) {{{1
 function! s:KeyMap.Create(options)
-    let newKeyMap = copy(self)
     let opts = extend({'scope': 'all', 'quickhelpText': ''}, copy(a:options))
+
+    "dont override other mappings unless the 'override' option is given
+    if get(opts, 'override', 0) == 0 && !empty(s:KeyMap.FindFor(opts['key'], opts['scope']))
+        return
+    end
+
+    let newKeyMap = copy(self)
     let newKeyMap.key = opts['key']
     let newKeyMap.quickhelpText = opts['quickhelpText']
     let newKeyMap.callback = opts['callback']

sources_non_forked/nerdtree/lib/nerdtree/nerdtree.vim

@@ -0,0 +1,39 @@
+"CLASS: NERDTree
+"============================================================
+let s:NERDTree = {}
+let g:NERDTree = s:NERDTree
+
+" Function: s:NERDTree.ExistsForBuffer()   {{{1
+" Returns 1 if a nerd tree root exists in the current buffer
+function! s:NERDTree.ExistsForBuf()
+    return exists("b:NERDTreeRoot")
+endfunction
+
+" Function: s:NERDTree.ExistsForTab()   {{{1
+" Returns 1 if a nerd tree root exists in the current tab
+function! s:NERDTree.ExistsForTab()
+    return exists("t:NERDTreeBufName")
+endfunction
+
+function! s:NERDTree.ForCurrentBuf()
+    if s:NERDTree.ExistsForBuf()
+        return b:NERDTree
+    else
+        return {}
+    endif
+endfunction
+
+function! s:NERDTree.New(path)
+    let newObj = copy(self)
+    let newObj.ui = g:NERDTreeUI.New(newObj)
+    let newObj.root = g:NERDTreeDirNode.New(a:path)
+
+    return newObj
+endfunction
+
+"FUNCTION: s:NERDTree.render() {{{1
+"A convenience function - since this is called often
+function! s:NERDTree.render()
+    call self.ui.render()
+endfunction
+

sources_non_forked/nerdtree/lib/nerdtree/notifier.vim

@@ -0,0 +1,35 @@
+"CLASS: Notifier
+"============================================================
+let s:Notifier = {}
+
+function! s:Notifier.AddListener(event, funcname)
+    let listeners = s:Notifier.GetListenersForEvent(a:event)
+    if listeners == []
+        let listenersMap = s:Notifier.GetListenersMap()
+        let listenersMap[a:event] = listeners
+    endif
+    call add(listeners, a:funcname)
+endfunction
+
+function! s:Notifier.NotifyListeners(event, path, params)
+    let event = g:NERDTreeEvent.New(b:NERDTree, a:path, a:event, a:params)
+
+    for listener in s:Notifier.GetListenersForEvent(a:event)
+        call {listener}(event)
+    endfor
+endfunction
+
+function! s:Notifier.GetListenersMap()
+    if !exists("s:refreshListenersMap")
+        let s:refreshListenersMap = {}
+    endif
+    return s:refreshListenersMap
+endfunction
+
+function! s:Notifier.GetListenersForEvent(name)
+    let listenersMap = s:Notifier.GetListenersMap()
+    return get(listenersMap, a:name, [])
+endfunction
+
+let g:NERDTreePathNotifier = deepcopy(s:Notifier)
+

sources_non_forked/nerdtree/lib/nerdtree/opener.vim

@@ -3,6 +3,29 @@
 let s:Opener = {}
 let g:NERDTreeOpener = s:Opener
 
+"FUNCTION: s:Opener._bufInWindows(bnum){{{1
+"[[STOLEN FROM VTREEEXPLORER.VIM]]
+"Determine the number of windows open to this buffer number.
+"Care of Yegappan Lakshman.  Thanks!
+"
+"Args:
+"bnum: the subject buffers buffer number
+function! s:Opener._bufInWindows(bnum)
+    let cnt = 0
+    let winnum = 1
+    while 1
+        let bufnum = winbufnr(winnum)
+        if bufnum < 0
+            break
+        endif
+        if bufnum ==# a:bnum
+            let cnt = cnt + 1
+        endif
+        let winnum = winnum + 1
+    endwhile
+
+    return cnt
+endfunction
 "FUNCTION: Opener._checkToCloseTree(newtab) {{{1
 "Check the class options and global options (i.e. NERDTreeQuitOnOpen) to see
 "if the tree should be closed now.
@@ -21,6 +44,24 @@ function! s:Opener._checkToCloseTree(newtab)
     endif
 endfunction
 
+
+"FUNCTION: s:Opener._firstUsableWindow(){{{1
+"find the window number of the first normal window
+function! s:Opener._firstUsableWindow()
+    let i = 1
+    while i <= winnr("$")
+        let bnum = winbufnr(i)
+        if bnum != -1 && getbufvar(bnum, '&buftype') ==# ''
+                    \ && !getwinvar(i, '&previewwindow')
+                    \ && (!getbufvar(bnum, '&modified') || &hidden)
+            return i
+        endif
+
+        let i += 1
+    endwhile
+    return -1
+endfunction
+
 "FUNCTION: Opener._gotoTargetWin() {{{1
 function! s:Opener._gotoTargetWin()
     if b:NERDTreeType ==# "secondary"
@@ -48,6 +89,37 @@ function! s:Opener._gotoTargetWin()
     endif
 endfunction
 
+"FUNCTION: s:Opener._isWindowUsable(winnumber) {{{1
+"Returns 0 if opening a file from the tree in the given window requires it to
+"be split, 1 otherwise
+"
+"Args:
+"winnumber: the number of the window in question
+function! s:Opener._isWindowUsable(winnumber)
+    "gotta split if theres only one window (i.e. the NERD tree)
+    if winnr("$") ==# 1
+        return 0
+    endif
+
+    let oldwinnr = winnr()
+    call nerdtree#exec(a:winnumber . "wincmd p")
+    let specialWindow = getbufvar("%", '&buftype') != '' || getwinvar('%', '&previewwindow')
+    let modified = &modified
+    call nerdtree#exec(oldwinnr . "wincmd p")
+
+    "if its a special window e.g. quickfix or another explorer plugin then we
+    "have to split
+    if specialWindow
+        return 0
+    endif
+
+    if &hidden
+        return 1
+    endif
+
+    return !modified || self._bufInWindows(winbufnr(a:winnumber)) >= 2
+endfunction
+
 "FUNCTION: Opener.New(path, opts) {{{1
 "Args:
 "
@@ -190,7 +262,7 @@ function! s:Opener._openDirectory(node)
         call self._gotoTargetWin()
         if empty(self._where)
             call a:node.makeRoot()
-            call nerdtree#renderView()
+            call b:NERDTree.render()
             call a:node.putCursorHere(0, 0)
         elseif self._where == 't'
             call g:NERDTreeCreator.CreatePrimary(a:node.path.str())
@@ -206,12 +278,12 @@ endfunction
 
 "FUNCTION: Opener._previousWindow() {{{1
 function! s:Opener._previousWindow()
-    if !nerdtree#isWindowUsable(winnr("#")) && nerdtree#firstUsableWindow() ==# -1
+    if !self._isWindowUsable(winnr("#")) && self._firstUsableWindow() ==# -1
         call self._newSplit()
     else
         try
-            if !nerdtree#isWindowUsable(winnr("#"))
-                call nerdtree#exec(nerdtree#firstUsableWindow() . "wincmd w")
+            if !self._isWindowUsable(winnr("#"))
+                call nerdtree#exec(self._firstUsableWindow() . "wincmd w")
             else
                 call nerdtree#exec('wincmd p')
             endif

sources_non_forked/nerdtree/lib/nerdtree/path.vim

@@ -33,8 +33,10 @@ function! s:Path.bookmarkNames()
 endfunction