Add versions of ALEGoToDefinition that open in splits

This is just like `:ALEGoToDefinitionInTab`, only a (v)split instead of
a tab.  Fixes #2140.

autoload/ale/definition.vim

@@ -86,7 +86,7 @@ function! s:OnReady(linter, lsp_details, line, column, options, ...) abort
     let l:request_id = ale#lsp#Send(l:id, l:message)
 
     let s:go_to_definition_map[l:request_id] = {
-    \   'open_in_tab': get(a:options, 'open_in_tab', 0),
+    \   'open_in': get(a:options, 'open_in', 'current-buffer'),
     \}
 endfunction
 

autoload/ale/util.vim

@@ -87,12 +87,25 @@ function! ale#util#GetFunction(string_or_ref) abort
     return a:string_or_ref
 endfunction
 
+" Open the file (at the given line).
+" options['open_in'] can be:
+"   current-buffer (default)
+"   tab
+"   vertical-split
+"   horizontal-split
 function! ale#util#Open(filename, line, column, options) abort
-    if get(a:options, 'open_in_tab', 0)
+    let l:open_in = get(a:options, 'open_in', 'current-buffer')
-        call ale#util#Execute('tabedit +' . a:line . ' ' . fnameescape(a:filename))
+    let l:args_to_open = '+' . a:line . ' ' . fnameescape(a:filename)
+
+    if l:open_in is# 'tab'
+        call ale#util#Execute('tabedit ' . l:args_to_open)
+    elseif l:open_in is# 'horizontal-split'
+        call ale#util#Execute('split ' . l:args_to_open)
+    elseif l:open_in is# 'vertical-split'
+        call ale#util#Execute('vsplit ' . l:args_to_open)
     elseif bufnr(a:filename) isnot bufnr('')
         " Open another file only if we need to.
-        call ale#util#Execute('edit +' . a:line . ' ' . fnameescape(a:filename))
+        call ale#util#Execute('edit ' . l:args_to_open)
     else
         normal! m`
     endif

doc/ale.txt

@@ -836,6 +836,8 @@ information returned by LSP servers. The following commands are supported:
 
 |ALEGoToDefinition|      - Open the definition of the symbol under the cursor.
 |ALEGoToDefinitionInTab| - The same, but for opening the file in a new tab.
+|ALEGoToDefinitionInSplit| - The same, but in a new split.
+|ALEGoToDefinitionInVSplit| - The same, but in a new vertical split.
 
 
 -------------------------------------------------------------------------------
@@ -2262,6 +2264,22 @@ ALEGoToDefinitionInTab                                 *ALEGoToDefinitionInTab*
   command.
 
 
+ALEGoToDefinitionInSplit                             *ALEGoToDefinitionInSplit*
+
+  The same as |ALEGoToDefinition|, but opens results in a new split.
+
+  A plug mapping `<Plug>(ale_go_to_definition_in_split)` is defined for this
+  command.
+
+
+ALEGoToDefinitionInVSplit                           *ALEGoToDefinitionInVSplit*
+
+  The same as |ALEGoToDefinition|, but opens results in a new vertical split.
+
+  A plug mapping `<Plug>(ale_go_to_definition_in_vsplit)` is defined for this
+  command.
+
+
 ALEHover                                                             *ALEHover*
 
   Print brief information about the symbol under the cursor, taken from any

plugin/ale.vim

@@ -188,7 +188,9 @@ command! -bar ALEFixSuggest :call ale#fix#registry#Suggest(&filetype)
 
 " Go to definition for tsserver and LSP
 command! -bar ALEGoToDefinition :call ale#definition#GoTo({})
-command! -bar ALEGoToDefinitionInTab :call ale#definition#GoTo({'open_in_tab': 1})
+command! -bar ALEGoToDefinitionInTab :call ale#definition#GoTo({'open_in': 'tab'})
+command! -bar ALEGoToDefinitionInSplit :call ale#definition#GoTo({'open_in': 'horizontal-split'})
+command! -bar ALEGoToDefinitionInVSplit :call ale#definition#GoTo({'open_in': 'vertical-split'})
 
 " Find references for tsserver and LSP
 command! -bar ALEFindReferences :call ale#references#Find()
@@ -222,6 +224,8 @@ nnoremap <silent> <Plug>(ale_detail) :ALEDetail<Return>
 nnoremap <silent> <Plug>(ale_fix) :ALEFix<Return>
 nnoremap <silent> <Plug>(ale_go_to_definition) :ALEGoToDefinition<Return>
 nnoremap <silent> <Plug>(ale_go_to_definition_in_tab) :ALEGoToDefinitionInTab<Return>
+nnoremap <silent> <Plug>(ale_go_to_definition_in_split) :ALEGoToDefinitionInSplit<Return>
+nnoremap <silent> <Plug>(ale_go_to_definition_in_vsplit) :ALEGoToDefinitionInVSplit<Return>
 nnoremap <silent> <Plug>(ale_find_references) :ALEFindReferences<Return>
 nnoremap <silent> <Plug>(ale_hover) :ALEHover<Return>
 nnoremap <silent> <Plug>(ale_documentation) :ALEDocumentation<Return>

test/test_go_to_definition.vader

@@ -71,7 +71,7 @@ Execute(Other messages for the tsserver handler should be ignored):
   call ale#definition#HandleTSServerResponse(1, {'command': 'foo'})
 
 Execute(Failed definition responses should be handled correctly):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleTSServerResponse(
   \ 1,
   \ {'command': 'definition', 'request_seq': 3}
@@ -79,7 +79,7 @@ Execute(Failed definition responses should be handled correctly):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Failed definition responses with no files should be handled correctly):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleTSServerResponse(
   \ 1,
   \ {
@@ -97,7 +97,7 @@ Given typescript(Some typescript file):
   bazxyzxyzxyz
 
 Execute(Other files should be jumped to for definition responses):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleTSServerResponse(
   \ 1,
   \ {
@@ -122,7 +122,7 @@ Execute(Other files should be jumped to for definition responses):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Other files should be jumped to for definition responses in tabs too):
-  call ale#definition#SetMap({3: {'open_in_tab': 1}})
+  call ale#definition#SetMap({3: {'open_in': 'tab'}})
   call ale#definition#HandleTSServerResponse(
   \ 1,
   \ {
@@ -146,6 +146,56 @@ Execute(Other files should be jumped to for definition responses in tabs too):
   AssertEqual [3, 7], getpos('.')[1:2]
   AssertEqual {}, ale#definition#GetMap()
 
+Execute(Other files should be jumped to for definition responses in splits too):
+  call ale#definition#SetMap({3: {'open_in': 'horizontal-split'}})
+  call ale#definition#HandleTSServerResponse(
+  \ 1,
+  \ {
+  \   'command': 'definition',
+  \   'request_seq': 3,
+  \   'success': v:true,
+  \   'body': [
+  \     {
+  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
+  \       'start': {'line': 3, 'offset': 7},
+  \     },
+  \   ],
+  \ }
+  \)
+
+  AssertEqual
+  \ [
+  \   'split +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
+  \ ],
+  \ g:expr_list
+  AssertEqual [3, 7], getpos('.')[1:2]
+  AssertEqual {}, ale#definition#GetMap()
+
+Execute(Other files should be jumped to for definition responses in vsplits too):
+  call ale#definition#SetMap({3: {'open_in': 'vertical-split'}})
+  call ale#definition#HandleTSServerResponse(
+  \ 1,
+  \ {
+  \   'command': 'definition',
+  \   'request_seq': 3,
+  \   'success': v:true,
+  \   'body': [
+  \     {
+  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
+  \       'start': {'line': 3, 'offset': 7},
+  \     },
+  \   ],
+  \ }
+  \)
+
+  AssertEqual
+  \ [
+  \   'vsplit +3 ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
+  \ ],
+  \ g:expr_list
+  AssertEqual [3, 7], getpos('.')[1:2]
+  AssertEqual {}, ale#definition#GetMap()
+
 Execute(tsserver completion requests should be sent):
   runtime ale_linters/typescript/tsserver.vim
   call setpos('.', [bufnr(''), 2, 5, 0])
@@ -165,7 +215,7 @@ Execute(tsserver completion requests should be sent):
   AssertEqual
   \ [[0, 'ts@definition', {'file': expand('%:p'), 'line': 2, 'offset': 5}]],
   \ g:message_list
-  AssertEqual {'42': {'open_in_tab': 0}}, ale#definition#GetMap()
+  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
 
 Execute(tsserver tab completion requests should be sent):
   runtime ale_linters/typescript/tsserver.vim
@@ -186,7 +236,7 @@ Execute(tsserver tab completion requests should be sent):
   AssertEqual
   \ [[0, 'ts@definition', {'file': expand('%:p'), 'line': 2, 'offset': 5}]],
   \ g:message_list
-  AssertEqual {'42': {'open_in_tab': 1}}, ale#definition#GetMap()
+  AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()
 
 Given python(Some Python file):
   foo
@@ -194,7 +244,7 @@ Given python(Some Python file):
   bazxyzxyzxyz
 
 Execute(Other files should be jumped to for LSP definition responses):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleLSPResponse(
   \ 1,
   \ {
@@ -217,7 +267,7 @@ Execute(Other files should be jumped to for LSP definition responses):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Locations inside the same file should be jumped to without using :edit):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleLSPResponse(
   \ 1,
   \ {
@@ -239,7 +289,7 @@ Execute(Locations inside the same file should be jumped to without using :edit):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Other files should be jumped to in tabs for LSP definition responses):
-  call ale#definition#SetMap({3: {'open_in_tab': 1}})
+  call ale#definition#SetMap({3: {'open_in': 'tab'}})
   call ale#definition#HandleLSPResponse(
   \ 1,
   \ {
@@ -262,7 +312,7 @@ Execute(Other files should be jumped to in tabs for LSP definition responses):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Definition responses with lists should be handled):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleLSPResponse(
   \ 1,
   \ {
@@ -293,7 +343,7 @@ Execute(Definition responses with lists should be handled):
   AssertEqual {}, ale#definition#GetMap()
 
 Execute(Definition responses with null response should be handled):
-  call ale#definition#SetMap({3: {'open_in_tab': 0}})
+  call ale#definition#SetMap({3: {'open_in': 'current-buffer'}})
   call ale#definition#HandleLSPResponse(1, {'id': 3, 'result': v:null})
 
   AssertEqual [], g:expr_list
@@ -332,7 +382,7 @@ Execute(LSP completion requests should be sent):
   \ ],
   \ g:message_list
 
-  AssertEqual {'42': {'open_in_tab': 0}}, ale#definition#GetMap()
+  AssertEqual {'42': {'open_in': 'current-buffer'}}, ale#definition#GetMap()
 
 Execute(LSP tab completion requests should be sent):
   runtime ale_linters/python/pyls.vim
@@ -368,4 +418,4 @@ Execute(LSP tab completion requests should be sent):
   \ ],
   \ g:message_list
 
-  AssertEqual {'42': {'open_in_tab': 1}}, ale#definition#GetMap()
+  AssertEqual {'42': {'open_in': 'tab'}}, ale#definition#GetMap()