feat(lsp)!: multiple client support for vim.lsp.buf.hover()

Deprecate `vim.lsp.handlers.hover` and `vim.lsp.handlers['textDocument/hover']`

runtime/doc/deprecated.txt

@@ -47,6 +47,8 @@ LSP
 • *vim.lsp.util.jump_to_location*
 • *vim.lsp.buf.execute_command*		Use |Client:exec_cmd()| instead.
 • *vim.lsp.buf.completion*		Use |vim.lsp.completion.trigger()| instead.
+• vim.lsp.buf_request_all		The `error` key has been renamed to `err` inside
+					the result parameter of the handler.
 
 ------------------------------------------------------------------------------
 DEPRECATED IN 0.10					*deprecated-0.10*

runtime/doc/lsp.txt

@@ -702,7 +702,10 @@ buf_request_all({bufnr}, {method}, {params}, {handler})
     Parameters: ~
       • {bufnr}    (`integer`) Buffer handle, or 0 for current.
       • {method}   (`string`) LSP method name
-      • {params}   (`table?`) Parameters to send to the server
+      • {params}   (`table|(fun(client: vim.lsp.Client, bufnr: integer): table?)?`)
+                   Parameters to send to the server. Can also be passed as a
+                   function that returns the params table for cases where
+                   parameters are specific to the client.
       • {handler}  (`function`) Handler called after all requests are
                    completed. Server results are passed as a
                    `client_id:result` map.
@@ -1268,6 +1271,13 @@ Lua module: vim.lsp.buf                                              *lsp-buf*
       • {title}?    (`string`) Title for the list.
       • {context}?  (`table`) `ctx` from |lsp-handler|
 
+*vim.lsp.buf.hover.Opts*
+    Extends: |vim.lsp.util.open_floating_preview.Opts|
+
+
+    Fields: ~
+      • {silent}?  (`boolean`)
+
 
                                           *vim.lsp.buf.add_workspace_folder()*
 add_workspace_folder({workspace_folder})
@@ -1385,7 +1395,7 @@ format({opts})                                          *vim.lsp.buf.format()*
                   contain `start` and `end` keys as described above, in which
                   case `textDocument/rangesFormatting` support is required.
 
-hover()                                                  *vim.lsp.buf.hover()*
+hover({config})                                          *vim.lsp.buf.hover()*
     Displays hover information about the symbol under the cursor in a floating
     window. The window will be dismissed on cursor move. Calling the function
     twice will jump into the floating window (thus by default, "KK" will open
@@ -1393,6 +1403,9 @@ hover()                                                  *vim.lsp.buf.hover()*
     mappings are available as usual, except that "q" dismisses the window. You
     can scroll the contents the same as you would any other buffer.
 
+    Parameters: ~
+      • {config}  (`vim.lsp.buf.hover.Opts?`) See |vim.lsp.buf.hover.Opts|.
+
 implementation({opts})                          *vim.lsp.buf.implementation()*
     Lists all the implementations for the symbol under the cursor in the
     quickfix window.
@@ -1812,27 +1825,6 @@ stop({bufnr}, {client_id})                    *vim.lsp.semantic_tokens.stop()*
 ==============================================================================
 Lua module: vim.lsp.handlers                                    *lsp-handlers*
 
-hover({_}, {result}, {ctx}, {config})               *vim.lsp.handlers.hover()*
-    |lsp-handler| for the method "textDocument/hover" >lua
-        vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(
-          vim.lsp.handlers.hover, {
-            -- Use a sharp border with `FloatBorder` highlights
-            border = "single",
-            -- add the title in hover float window
-            title = "hover"
-          }
-        )
-<
-
-    Parameters: ~
-      • {result}  (`lsp.Hover`)
-      • {ctx}     (`lsp.HandlerContext`)
-      • {config}  (`table`) Configuration table.
-                  • border: (default=nil)
-                    • Add borders to the floating window
-                    • See |vim.lsp.util.open_floating_preview()| for more
-                      options.
-
                                            *vim.lsp.handlers.signature_help()*
 signature_help({_}, {result}, {ctx}, {config})
     |lsp-handler| for the method "textDocument/signatureHelp".

runtime/doc/news.txt

@@ -79,13 +79,10 @@ LSP
   customizing the transformation of an LSP CompletionItem to |complete-items|.
 • |vim.lsp.diagnostic.from()| can be used to convert a list of
   |vim.Diagnostic| objects into their LSP diagnostic representation.
-• |vim.lsp.buf.references()| now handles multiple clients but no longer
+• |vim.lsp.buf.references()|, |vim.lsp.buf.declaration()|, |vim.lsp.buf.definition()|,
-  triggers the global `textDocument/references` handler from
+  |vim.lsp.buf.type_definition()|, |vim.lsp.buf.implementation()| and
-  `vim.lsp.handlers`
+  |vim.lsp.buf.hover()| now support merging the results of multiple clients
-• |vim.lsp.buf.declaration()|, |vim.lsp.buf.definition()|,
+  but no longer trigger the global handlers from `vim.lsp.handlers`
-  |vim.lsp.buf.type_definition()| and |vim.lsp.buf.implementation()| now
-  support merging the results of multiple clients but no longer trigger the
-  global handlers from `vim.lsp.handlers`
 • |vim.lsp.buf.typehierarchy()| now passes the correct params for each
   client request.
 

runtime/lua/vim/lsp.lua

@@ -915,7 +915,9 @@ end
 ---
 ---@param bufnr (integer) Buffer handle, or 0 for current.
 ---@param method (string) LSP method name
----@param params? table|(fun(client: vim.lsp.Client, bufnr: integer): table?) Parameters to send to the server
+---@param params? table|(fun(client: vim.lsp.Client, bufnr: integer): table?) Parameters to send to the server.
+---               Can also be passed as a function that returns the params table for cases where
+---               parameters are specific to the client.
 ---@param handler lsp.MultiHandler (function)
 --- Handler called after all requests are completed. Server results are passed as
 --- a `client_id:result` map.

runtime/lua/vim/lsp/_meta.lua

@@ -2,6 +2,7 @@
 error('Cannot require a meta file')
 
 ---@alias lsp.Handler fun(err: lsp.ResponseError?, result: any, context: lsp.HandlerContext, config?: table): ...any
+---@alias lsp.MultiHandler fun(results: table<integer,{err: lsp.ResponseError?, result: any}>, context: lsp.HandlerContext, config?: table): ...any
 
 ---@class lsp.HandlerContext
 ---@field method string

runtime/lua/vim/lsp/buf.lua

@@ -20,6 +20,9 @@ local function client_positional_params(params)
   end
 end
 
+--- @class vim.lsp.buf.hover.Opts : vim.lsp.util.open_floating_preview.Opts
+--- @field silent? boolean
+
 --- Displays hover information about the symbol under the cursor in a floating
 --- window. The window will be dismissed on cursor move.
 --- Calling the function twice will jump into the floating window
@@ -27,8 +30,78 @@ end
 --- In the floating window, all commands and mappings are available as usual,
 --- except that "q" dismisses the window.
 --- You can scroll the contents the same as you would any other buffer.
-function M.hover()
+--- @param config? vim.lsp.buf.hover.Opts
-  lsp.buf_request(0, ms.textDocument_hover, client_positional_params())
+function M.hover(config)
+  config = config or {}
+  config.focus_id = ms.textDocument_hover
+
+  lsp.buf_request_all(0, ms.textDocument_hover, client_positional_params(), function(results, ctx)
+    if api.nvim_get_current_buf() ~= ctx.bufnr then
+      -- Ignore result since buffer changed. This happens for slow language servers.
+      return
+    end
+
+    -- Filter errors from results
+    local results1 = {} --- @type table<integer,lsp.Hover>
+
+    for client_id, resp in pairs(results) do
+      local err, result = resp.err, resp.result
+      if err then
+        lsp.log.error(err.code, err.message)
+      elseif result then
+        results1[client_id] = result
+      end
+    end
+
+    if #results1 == 0 then
+      if config.silent ~= true then
+        vim.notify('No information available')
+      end
+      return
+    end
+
+    local contents = {} --- @type string[]
+
+    local nresults = #vim.tbl_keys(results1)
+
+    local format = 'markdown'
+
+    for client_id, result in pairs(results1) do
+      if nresults > 1 then
+        -- Show client name if there are multiple clients
+        contents[#contents + 1] = string.format('# %s', lsp.get_client_by_id(client_id).name)
+      end
+      if type(result.contents) == 'table' and result.contents.kind == 'plaintext' then
+        if #results1 == 1 then
+          format = 'plaintext'
+          contents = vim.split(result.contents.value or '', '\n', { trimempty = true })
+        else
+          -- Surround plaintext with ``` to get correct formatting
+          contents[#contents + 1] = '```'
+          vim.list_extend(
+            contents,
+            vim.split(result.contents.value or '', '\n', { trimempty = true })
+          )
+          contents[#contents + 1] = '```'
+        end
+      else
+        vim.list_extend(contents, util.convert_input_to_markdown_lines(result.contents))
+      end
+      contents[#contents + 1] = '---'
+    end
+
+    -- Remove last linebreak ('---')
+    contents[#contents] = nil
+
+    if vim.tbl_isempty(contents) then
+      if config.silent ~= true then
+        vim.notify('No information available')
+      end
+      return
+    end
+
+    lsp.util.open_floating_preview(contents, format, config)
+  end)
 end
 
 local function request_with_opts(name, params, opts)

runtime/lua/vim/lsp/handlers.lua

@@ -317,7 +317,7 @@ M[ms.textDocument_formatting] = function(_, result, ctx, _)
   util.apply_text_edits(result, ctx.bufnr, client.offset_encoding)
 end
 
---- @deprecated
+--- @deprecated remove in 0.13
 --- @see # https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_completion
 M[ms.textDocument_completion] = function(_, result, _, _)
   if vim.tbl_isempty(result or {}) then
@@ -334,6 +334,7 @@ M[ms.textDocument_completion] = function(_, result, _, _)
   vim.fn.complete(textMatch + 1, matches)
 end
 
+--- @deprecated
 --- |lsp-handler| for the method "textDocument/hover"
 ---
 --- ```lua
@@ -384,7 +385,9 @@ function M.hover(_, result, ctx, config)
   return util.open_floating_preview(contents, format, config)
 end
 
+--- @deprecated remove in 0.13
 --- @see # https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_hover
+--- @diagnostic disable-next-line: deprecated
 M[ms.textDocument_hover] = M.hover
 
 local sig_help_ns = api.nvim_create_namespace('vim_lsp_signature_help')