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Refactor the "TreeDirNode.displayString()" method

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I found this method to be unreadable and cumbersome. Cleaning it up
helped me to understand the design ideas behind it.
This commit is contained in:
Jason Franklin 2017-06-29 17:53:47 -04:00
parent 2e43ad074b
commit 18f04e0824
1 changed files with 18 additions and 8 deletions
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26
lib/nerdtree/tree_dir_node.vim
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@ -78,19 +78,29 @@ function! s:TreeDirNode.createChild(path, inOrder)
endfunction
" FUNCTION: TreeDirNode.displayString() {{{1
unlet s:TreeDirNode.displayString
" Assemble and return a string that can represent this TreeDirNode object in
" the NERDTree window.
function! s:TreeDirNode.displayString()
let cascade = self.getCascade()
let rv = ""
for node in cascade
let rv = rv . node.path.displayString()
let l:result = ''
" Build a label that identifies this TreeDirNode.
let l:label = ''
let l:cascade = self.getCascade()
for l:dirNode in l:cascade
let l:label .= l:dirNode.path.displayString()
endfor
let sym = cascade[-1].isOpen ? g:NERDTreeDirArrowCollapsible : g:NERDTreeDirArrowExpandable
" Select the appropriate open/closed status indicator symbol.
if l:cascade[-1].isOpen
let l:symbol = g:NERDTreeDirArrowCollapsible
else
let l:symbol = g:NERDTreeDirArrowExpandable
endif
let flags = cascade[-1].path.flagSet.renderToString()
let l:flags = l:cascade[-1].path.flagSet.renderToString()
return sym . ' ' . flags . rv
let l:result = l:symbol . ' ' . l:flags . l:label
return l:result
endfunction
" FUNCTION: TreeDirNode.findNode(path) {{{1