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feat(mappings): show leaf node in preview window (#518)
This revision introduces new plugin mappings for showing the current leaf node in a preview window, through the 'preview' and 'preview:*' actions available for the 'file://' scheme. Documentation has been updated accordingly.
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‎autoload/fern/scheme/file/mapping.vim

+36-12
Original file line numberDiff line numberDiff line change
@@ -1,18 +1,25 @@
11
let s:Promise = vital#fern#import('Async.Promise')
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function! fern#scheme#file#mapping#init(disable_default_mappings) abort
4-
nnoremap <buffer><silent> <Plug>(fern-action-new-path) :<C-u>call <SID>call('new_path')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-file) :<C-u>call <SID>call('new_file')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-dir) :<C-u>call <SID>call('new_dir')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-path=) :<C-u>call <SID>call_without_guard('new_path')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-file=) :<C-u>call <SID>call_without_guard('new_file')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-dir=) :<C-u>call <SID>call_without_guard('new_dir')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-copy) :<C-u>call <SID>call('copy')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-move) :<C-u>call <SID>call('move')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-trash) :<C-u>call <SID>call('trash')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-trash=) :<C-u>call <SID>call_without_guard('trash')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-remove) :<C-u>call <SID>call('remove')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-remove=) :<C-u>call <SID>call_without_guard('remove')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-path) :<C-u>call <SID>call('new_path')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-file) :<C-u>call <SID>call('new_file')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-dir) :<C-u>call <SID>call('new_dir')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-path=) :<C-u>call <SID>call_without_guard('new_path')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-file=) :<C-u>call <SID>call_without_guard('new_file')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-new-dir=) :<C-u>call <SID>call_without_guard('new_dir')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-copy) :<C-u>call <SID>call('copy')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-move) :<C-u>call <SID>call('move')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-trash) :<C-u>call <SID>call('trash')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-trash=) :<C-u>call <SID>call_without_guard('trash')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-remove) :<C-u>call <SID>call('remove')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-remove=) :<C-u>call <SID>call_without_guard('remove')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-preview:left) :<C-u>call <SID>call('preview', 'vertical topleft')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-preview:right) :<C-u>call <SID>call('preview', 'vertical botright')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-preview:top) :<C-u>call <SID>call('preview', 'topleft')<CR>
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nnoremap <buffer><silent> <Plug>(fern-action-preview:bottom) :<C-u>call <SID>call('preview', 'botright')<CR>
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" Alias map
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nnoremap <buffer><silent> <Plug>(fern-action-preview) <Plug>(fern-action-preview:bottom)
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if !a:disable_default_mappings
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nmap <buffer><nowait> N <Plug>(fern-action-new-file)
@@ -205,6 +212,23 @@ function! s:map_remove(helper) abort
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\.then({ -> a:helper.sync.echo(printf('%d items are removed', len(ps))) })
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endfunction
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function! s:map_preview(helper, prefix) abort
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let node = a:helper.sync.get_cursor_node()
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if node is# v:null
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return s:Promise.reject('cursor node is not visible')
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endif
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if node.status isnot# a:helper.STATUS_NONE
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return s:Promise.resolve()
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endif
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try
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execute printf("noautocmd %s pedit %s", a:prefix, fnameescape(node._path))
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return s:Promise.resolve()
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catch
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return s:Promise.reject(v:exception)
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endtry
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endfunction
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function! s:new_file(helper, name) abort
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let node = a:helper.sync.get_cursor_node()
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let node = node.status isnot# a:helper.STATUS_EXPANDED ? node.__owner : node

‎doc/fern.txt

+17-2
Original file line numberDiff line numberDiff line change
@@ -1037,6 +1037,7 @@ GLOBAL *fern-mapping-global*
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\ <Plug>(fern-action-open:edit)
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\ <Plug>(fern-action-open:edit-or-tabedit)
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<
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*<Plug>(fern-action-open)*
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An alias to "open:edit" action. Users can overwrite this mapping to
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change the default behavior of "open" action like:
@@ -1045,6 +1046,7 @@ GLOBAL *fern-mapping-global*
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\ <Plug>(fern-action-open)
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\ <Plug>(fern-action-open:select)
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<
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*<Plug>(fern-action-diff:select)*
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*<Plug>(fern-action-diff:select:vert)*
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Open a first marked node through "window selector"
@@ -1252,7 +1254,7 @@ The following mappings/actions are only available on file:// scheme.
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nmap <buffer>
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\ <Plug>(my-trash)
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\ <Plug>(fern-action-trash=)y<CR>
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<
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*<Plug>(fern-action-remove)*
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*<Plug>(fern-action-remove=)*
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Open a prompt to ask if fern can DELETE the cursor node or marked
@@ -1265,7 +1267,7 @@ The following mappings/actions are only available on file:// scheme.
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nmap <buffer>
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\ <Plug>(my-trash)
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\ <Plug>(fern-action-trash=)y<CR>
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<
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*<Plug>(fern-action-cd:root)*
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*<Plug>(fern-action-lcd:root)*
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*<Plug>(fern-action-tcd:root)*
@@ -1372,6 +1374,19 @@ The following mappings/actions are only available on file:// scheme.
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Yank the node path. In FILE scheme, |<Plug>(fern-action-yank)| is
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aliased to this mapping.
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*<Plug>(fern-action-preview:left)*
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*<Plug>(fern-action-preview:right)*
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*<Plug>(fern-action-preview:top)*
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*<Plug>(fern-action-preview:bottom)*
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*<Plug>(fern-action-preview)*
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Show the cursor node in a |preview-window| in similar manners of global
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"open" actions.
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If you would like to jump to the preview window, you can register a
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mapping like:
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>
1387+
nnoremap P <Plug>(fern-action-preview)<C-w>p
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<
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-----------------------------------------------------------------------------
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DICT *fern-mapping-dict*
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