" ============================================================================
" File:        fs_menu.vim
" Description: plugin for the NERD Tree that provides a file system menu
" Maintainer:  Martin Grenfell <martin_grenfell at msn dot com>
" Last Change: 17 July, 2009
" License:     This program is free software. It comes without any warranty,
"              to the extent permitted by applicable law. You can redistribute
"              it and/or modify it under the terms of the Do What The Fuck You
"              Want To Public License, Version 2, as published by Sam Hocevar.
"              See http://sam.zoy.org/wtfpl/COPYING for more details.
"
" ============================================================================
if exists("g:loaded_nerdtree_fs_menu")
    finish
endif
let g:loaded_nerdtree_fs_menu = 1

call NERDTreeAddMenuItem({'text': '(a)dd a childnode', 'shortcut': 'a', 'callback': 'NERDTreeAddNode'})
call NERDTreeAddMenuItem({'text': '(m)ove the curent node', 'shortcut': 'm', 'callback': 'NERDTreeMoveNode'})
call NERDTreeAddMenuItem({'text': '(d)elete the curent node', 'shortcut': 'd', 'callback': 'NERDTreeDeleteNode'})
if g:NERDTreePath.CopyingSupported()
    call NERDTreeAddMenuItem({'text': '(c)copy the current node', 'shortcut': 'c', 'callback': 'NERDTreeCopyNode'})
endif

"FUNCTION: s:echo(msg){{{1
function! s:echo(msg)
    redraw
    echomsg "NERDTree: " . a:msg
endfunction

"FUNCTION: s:echoWarning(msg){{{1
function! s:echoWarning(msg)
    echohl warningmsg
    call s:echo(a:msg)
    echohl normal
endfunction

"FUNCTION: s:promptToDelBuffer(bufnum, msg){{{1
"prints out the given msg and, if the user responds by pushing 'y' then the
"buffer with the given bufnum is deleted
"
"Args:
"bufnum: the buffer that may be deleted
"msg: a message that will be echoed to the user asking them if they wish to
"     del the buffer
function! s:promptToDelBuffer(bufnum, msg)
    echo a:msg
    if nr2char(getchar()) ==# 'y'
        exec "silent bdelete! " . a:bufnum
    endif
endfunction

"FUNCTION: NERDTreeAddNode(){{{1
function! NERDTreeAddNode()
    let curDirNode = g:NERDTreeDirNode.GetSelected()

    let newNodeName = input("Add a childnode\n".
                          \ "==========================================================\n".
                          \ "Enter the dir/file name to be created. Dirs end with a '/'\n" .
                          \ "", curDirNode.path.strForGlob() . g:NERDTreePath.Slash())

    if newNodeName ==# ''
        call s:echo("Node Creation Aborted.")
        return
    endif

    try
        let newPath = g:NERDTreePath.Create(newNodeName)
        let parentNode = b:NERDTreeRoot.findNode(newPath.getParent())

        let newTreeNode = g:NERDTreeFileNode.New(newPath)
        if parentNode.isOpen || !empty(parentNode.children)
            call parentNode.addChild(newTreeNode, 1)
            call NERDTreeRender()
            call newTreeNode.putCursorHere(1, 0)
        endif
    catch /^NERDTree/
        call s:echoWarning("Node Not Created.")
    endtry
endfunction

"FUNCTION: NERDTreeMoveNode(){{{1
function! NERDTreeMoveNode()
    let curNode = g:NERDTreeFileNode.GetSelected()
    let newNodePath = input("Rename the current node\n" .
                          \ "==========================================================\n" .
                          \ "Enter the new path for the node:                          \n" .
                          \ "", curNode.path.strForOS(0))

    if newNodePath ==# ''
        call s:echo("Node Renaming Aborted.")
        return
    endif

    try
        let bufnum = bufnr(curNode.path.str())

        call curNode.rename(newNodePath)
        call NERDTreeRender()

        "if the node is open in a buffer, ask the user if they want to
        "close that buffer
        if bufnum != -1
            let prompt = "\nNode renamed.\n\nThe old file is open in buffer ". bufnum . (bufwinnr(bufnum) ==# -1 ? " (hidden)" : "") .". Delete this buffer? (yN)"
            call s:promptToDelBuffer(bufnum, prompt)
        endif

        call curNode.putCursorHere(1, 0)

        redraw
    catch /^NERDTree/
        call s:echoWarning("Node Not Renamed.")
    endtry
endfunction

" FUNCTION: NERDTreeDeleteNode() {{{1
function! NERDTreeDeleteNode()
    let currentNode = g:NERDTreeFileNode.GetSelected()
    let confirmed = 0

    if currentNode.path.isDirectory
        let choice =input("Delete the current node\n" .
                         \ "==========================================================\n" .
                         \ "STOP! To delete this entire directory, type 'yes'\n" .
                         \ "" . currentNode.path.strForOS(0) . ": ")
        let confirmed = choice ==# 'yes'
    else
        echo "Delete the current node\n" .
           \ "==========================================================\n".
           \ "Are you sure you wish to delete the node:\n" .
           \ "" . currentNode.path.strForOS(0) . " (yN):"
        let choice = nr2char(getchar())
        let confirmed = choice ==# 'y'
    endif


    if confirmed
        try
            call currentNode.delete()
            call NERDTreeRender()

            "if the node is open in a buffer, ask the user if they want to
            "close that buffer
            let bufnum = bufnr(currentNode.path.str())
            if buflisted(bufnum)
                let prompt = "\nNode deleted.\n\nThe file is open in buffer ". bufnum . (bufwinnr(bufnum) ==# -1 ? " (hidden)" : "") .". Delete this buffer? (yN)"
                call s:promptToDelBuffer(bufnum, prompt)
            endif

            redraw
        catch /^NERDTree/
            call s:echoWarning("Could not remove node")
        endtry
    else
        call s:echo("delete aborted")
    endif

endfunction

" FUNCTION: NERDTreeCopyNode() {{{1
function! NERDTreeCopyNode()
    let currentNode = g:NERDTreeFileNode.GetSelected()
    let newNodePath = input("Copy the current node\n" .
                          \ "==========================================================\n" .
                          \ "Enter the new path to copy the node to:                   \n" .
                          \ "", currentNode.path.str())

    if newNodePath != ""
        "strip trailing slash
        let newNodePath = substitute(newNodePath, '\/$', '', '')

        let confirmed = 1
        if currentNode.path.copyingWillOverwrite(newNodePath)
            call s:echo("Warning: copying may overwrite files! Continue? (yN)")
            let choice = nr2char(getchar())
            let confirmed = choice ==# 'y'
        endif

        if confirmed
            try
                let newNode = currentNode.copy(newNodePath)
                call NERDTreeRender()
                call newNode.putCursorHere(0, 0)
            catch /^NERDTree/
                call s:echoWarning("Could not copy node")
            endtry
        endif
    else
        call s:echo("Copy aborted.")
    endif
    redraw
endfunction

" vim: set sw=4 sts=4 et fdm=marker: