fix: add custom hover handler

lua/otter/keeper.lua

@@ -9,6 +9,7 @@ local extensions = require 'otter.tools.extensions'
 local api = vim.api
 local ts = vim.treesitter
 local parsers = require 'nvim-treesitter.parsers'
+local handlers = require'otter.tools.handlers'
 
 
 M._otters_attached = {}
@@ -178,7 +179,15 @@ M.send_request = function(main_nr, request, filter)
           -- otherwise apply the filter to the one response
           response = filter(response)
         end
-        vim.lsp.handlers[request](err, response, method, ...)
+        if request == 'textDocument/hover' or request == 'textDocument/signatureHelp' then
+          local default_handler = vim.lsp.handlers[request]
+          -- can I somehow get the config out of the default_handler
+          -- if it has been modified with vim.lsp.with(...)?
+          local config = {}
+          handlers.hover(err, response, method, config)
+        else
+          vim.lsp.handlers[request](err, response, method, ...)
+        end
       end
     end
     )

lua/otter/tools/handlers.lua

@@ -0,0 +1,22 @@
+local util = require('vim.lsp.util')
+
+local M = {}
+function M.hover(_, result, ctx, config)
+  config = config or {}
+  config.focus_id = ctx.method
+  -- don't ignore hover responses from other buffers
+  if not (result and result.contents) then
+    vim.notify('No information available')
+    return
+  end
+  local markdown_lines = util.convert_input_to_markdown_lines(result.contents)
+  markdown_lines = util.trim_empty_lines(markdown_lines)
+  if vim.tbl_isempty(markdown_lines) then
+    vim.notify('No information available')
+    return
+  end
+  return util.open_floating_preview(markdown_lines, 'markdown', config)
+end
+
+return M
+