added support for basic textDocument/publishDiagnostics via :LspDocumententDiagnostics

README.md

@@ -70,6 +70,7 @@ Plug 'prabirshrestha/asyncomplete-lsp.vim'
 
 | Command | Description|
 |--|--|
+|`:LspDocumentDiagnostics`| Get current document diagnostics information |
 |`:LspDefinition`| Go to definition |
 |`:LspDocumentFormat`| Format entire document |
 |`:LspDocumentRangeFormat`| Format document selection |

autoload/lsp.vim

@@ -423,7 +423,7 @@ function! s:on_notification(server_name, id, data, event) abort
     if lsp#client#is_server_instantiated_notification(a:data)
         if has_key(l:response, 'method')
             if l:response['method'] == 'textDocument/publishDiagnostics'
-                call lsp#ui#vim#handle_text_document_publish_diagnostics(a:server_name, l:response)
+                call lsp#ui#vim#handle_text_document_publish_diagnostics(a:server_name, a:data)
             endif
         endif
     else

autoload/lsp/ui/vim.vim

@@ -1,4 +1,5 @@
 let s:last_req_id = 0
+let s:diagnostics = {} " { uri: { 'server_name': response } }
 
 function! lsp#ui#vim#definition() abort
     let l:servers = filter(lsp#get_whitelisted_servers(), 'lsp#capabilities#has_definition_provider(v:val)')
@@ -233,10 +234,39 @@ function! lsp#ui#vim#document_symbol() abort
 endfunction
 
 function! lsp#ui#vim#handle_text_document_publish_diagnostics(server_name, data) abort
-    if lsp#client#is_error(a:data)
+    if lsp#client#is_error(a:data['response'])
         return
     endif
-    " TODO: handle textDocument/publishDiagnostics
+    let l:uri = a:data['response']['params']['uri']
+    if !has_key(s:diagnostics, l:uri)
+        let s:diagnostics[l:uri] = {}
+    endif
+    let s:diagnostics[l:uri][a:server_name] = a:data
+endfunction
+
+function! lsp#ui#vim#document_diagnostics() abort
+    let l:uri = lsp#utils#get_buffer_uri()
+    if !has_key(s:diagnostics, l:uri)
+        echom 'No diagnostics results'
+        return
+    endif
+
+    let l:diagnostics = s:diagnostics[l:uri]
+    let l:result = []
+    for [l:server_name, l:data] in items(l:diagnostics)
+        let l:result += lsp#ui#vim#utils#diagnostics_to_loc_list(l:data)
+    endfor
+
+    call setqflist(l:result)
+
+    " autocmd FileType qf setlocal wrap
+
+    if empty(l:result)
+        echom 'No diagnostics results found'
+    else
+        echom 'Retrieved diagnostics results'
+        copen
+    endif
 endfunction
 
 function! s:handle_symbol(server, last_req_id, type, data) abort

autoload/lsp/ui/vim/utils.vim

@@ -47,6 +47,13 @@ let s:symbol_kinds = {
     \ '18': 'array',
     \ }
 
+let s:diagnostic_severity = {
+    \ 1: 'Error',
+    \ 2: 'Warning',
+    \ 3: 'Information',
+    \ 4: 'Hint',
+    \ }
+
 function! lsp#ui#vim#utils#symbols_to_loc_list(result) abort
     if !has_key(a:result['response'], 'result')
         return []
@@ -77,6 +84,45 @@ function! lsp#ui#vim#utils#symbols_to_loc_list(result) abort
     return l:list
 endfunction
 
+function! lsp#ui#vim#utils#diagnostics_to_loc_list(result) abort
+    if !has_key(a:result['response'], 'params')
+        return
+    endif
+
+    let l:uri = a:result['response']['params']['uri']
+    let l:diagnostics = a:result['response']['params']['diagnostics']
+
+    let l:list = []
+
+    if !empty(l:diagnostics) && s:is_file_uri(l:uri)
+        let l:path = lsp#utils#uri_to_path(l:uri)
+        let l:bufnr = bufnr(l:path)
+        for l:item in l:diagnostics
+            let l:text = ''
+            if has_key(l:item, 'source') && !empty(l:item['source'])
+                let l:text .= l:item['source'] . ':'
+            endif
+            if has_key(l:item, 'severity') && !empty(l:item['severity'])
+                let l:text .= s:get_diagnostic_severity_text(l:item['severity']) . ':'
+            endif
+            if has_key(l:item, 'code') && !empty(l:item['code'])
+                let l:text .= l:item['code'] . ':'
+            endif
+            let l:text .= l:item['message']
+            let l:line = l:item['range']['start']['line'] + 1
+            let l:col = l:item['range']['start']['character'] + 1
+            call add(l:list, {
+                \ 'filename': l:path,
+                \ 'lnum': l:line,
+                \ 'col': l:col,
+                \ 'text': l:text,
+                \ })
+        endfor
+    endif
+
+    return l:list
+endfunction
+
 function! s:is_file_uri(uri) abort
     return stridx(a:uri, 'file:///') == 0
 endfunction
@@ -85,3 +131,7 @@ endfunction
 function! s:get_symbol_text_from_kind(kind)
     return has_key(s:symbol_kinds, a:kind) ? s:symbol_kinds[a:kind] : 'unknown symbol ' . a:kind
 endfunction
+
+function! s:get_diagnostic_severity_text(severity)
+    return s:diagnostic_severity[a:severity]
+endfunction

plugin/lsp.vim

@@ -15,6 +15,7 @@ endif
 
 command! LspDefinition call lsp#ui#vim#definition()
 command! LspDocumentSymbol call lsp#ui#vim#document_symbol()
+command! LspDocumentDiagnostics call lsp#ui#vim#document_diagnostics()
 command! LspHover call lsp#ui#vim#hover()
 command! LspReferences call lsp#ui#vim#references()
 command! LspRename call lsp#ui#vim#rename()