wip: Possibly add support for clangd's textDocument/switchSourceHeader ?poc/switch_source_header

Issue at: https://github.com/dense-analysis/ale/issues/5007

4 files changed, 24 insertions, 0 deletions

diff --git a/autoload/ale/definition.vim b/autoload/ale/definition.vim
index e58a5642..300744dd 100644
--- a/autoload/ale/definition.vim
+++ b/autoload/ale/definition.vim
@@ -229,6 +229,8 @@ function! s:OnReady(line, column, options, capability, linter, lsp_details) abor
             let l:message = ale#lsp#message#TypeDefinition(l:buffer, a:line, a:column)
         elseif a:capability is# 'implementation'
             let l:message = ale#lsp#message#Implementation(l:buffer, a:line, a:column)
+        elseif a:capability is# 'switchsourceheader'
+            let l:message = ale#lsp#message#SwitchSourceHeader(l:buffer)
         else
             " XXX: log here?
             return
@@ -272,6 +274,12 @@ function! ale#definition#GoToImpl(options) abort
     endfor
 endfunction
 
+function! ale#definition#SwitchSourceHeader(options) abort
+    for l:linter in ale#lsp_linter#GetEnabled(bufnr(''))
+        call s:GoToLSPDefinition(l:linter, a:options, 'switchsourceheader')
+    endfor
+endfunction
+
 function! ale#definition#GoToCommandHandler(command, ...) abort
     let l:options = {}
 
@@ -299,6 +307,8 @@ function! ale#definition#GoToCommandHandler(command, ...) abort
         call ale#definition#GoToType(l:options)
     elseif a:command is# 'implementation'
         call ale#definition#GoToImpl(l:options)
+    elseif a:command is# 'switchsourceheader'
+        call ale#definition#SwitchSourceHeader(l:options)
     else
         call ale#definition#GoTo(l:options)
     endif
diff --git a/autoload/ale/lsp.vim b/autoload/ale/lsp.vim
index 07b073f8..7ba5b124 100644
--- a/autoload/ale/lsp.vim
+++ b/autoload/ale/lsp.vim
@@ -490,6 +490,9 @@ function! s:SendInitMessage(conn) abort
     \               'typeDefinition': {
     \                   'dynamicRegistration': v:false,
     \               },
+    \               'switchSourceHeader': {
+    \                   'dynamicRegistration': v:false,
+    \               },
     \               'implementation': {
     \                   'dynamicRegistration': v:false,
     \                   'linkSupport': v:false,
@@ -837,6 +840,7 @@ endfunction
 
 " Check if an LSP has a given capability.
 function! ale#lsp#HasCapability(conn_id, capability) abort
+    return 1
     let l:conn = get(s:connections, a:conn_id, {})
 
     if empty(l:conn)
diff --git a/autoload/ale/lsp/message.vim b/autoload/ale/lsp/message.vim
index 72ed7d59..36fc43f3 100644
--- a/autoload/ale/lsp/message.vim
+++ b/autoload/ale/lsp/message.vim
@@ -126,6 +126,14 @@ function! ale#lsp#message#Definition(buffer, line, column) abort
     \}]
 endfunction
 
+" https://clangd.llvm.org/extensions#switch-between-sourceheader
+function! ale#lsp#message#SwitchSourceHeader(buffer) abort
+    return [0, 'textDocument/switchSourceHeader', {
+    \   'TextDocumentIdentifier':
+    \       ale#util#ToURI(expand('#' . a:buffer . ':p')),
+    \}]
+endfunction
+
 function! ale#lsp#message#TypeDefinition(buffer, line, column) abort
     return [0, 'textDocument/typeDefinition', {
     \   'textDocument': {
diff --git a/plugin/ale.vim b/plugin/ale.vim
index ba702956..5b0101b0 100644
--- a/plugin/ale.vim
+++ b/plugin/ale.vim
@@ -297,6 +297,8 @@ command! -bar -nargs=* ALEGoToTypeDefinition :call ale#definition#GoToCommandHan
 " Go to implementation for tsserver and LSP
 command! -bar -nargs=* ALEGoToImplementation :call ale#definition#GoToCommandHandler('implementation', <f-args>)
 
+command! -bar -nargs=* ALESwitchSourceHeader :call ale#definition#GoToCommandHandler('switchsourceheader', <f-args>)
+
 " Repeat a previous selection in the preview window
 command! -bar ALERepeatSelection :call ale#preview#RepeatSelection()