Merge pull request #672 from mjlbach/refactor_lspinfo

lspinfo: move to module

1 files changed, 117 insertions, 0 deletions

diff --git a/lua/lspconfig/lspinfo.lua b/lua/lspconfig/lspinfo.lua
new file mode 100644
index 00000000..902cd87e
--- /dev/null
+++ b/lua/lspconfig/lspinfo.lua
@@ -0,0 +1,117 @@
+local configs = require 'lspconfig/configs'
+local lspui = require 'lspconfig/_lspui'
+
+return function ()
+  -- These options need to be cached before switching to the floating
+  -- buffer.
+  local buf_clients = vim.lsp.buf_get_clients()
+  local clients = vim.lsp.get_active_clients()
+  local buffer_filetype = vim.bo.filetype
+  local buffer_dir = vim.fn.expand('%:p:h')
+
+  local win_info = lspui.percentage_range_window(0.8, 0.7)
+  local bufnr, win_id = win_info.bufnr, win_info.win_id
+
+  local buf_lines = {}
+  local header = {
+    "Available servers:",
+    "\t"..table.concat(vim.tbl_keys(configs), ', '),
+    "",
+    "Clients attached to this buffer: "..tostring(#buf_clients)
+  }
+  vim.list_extend(buf_lines, header)
+
+  local function trim_whitespace(cmd)
+    local trimmed_cmd = {}
+    for _, str in ipairs(cmd) do
+      table.insert(trimmed_cmd, str:match'^%s*(.*)')
+    end
+    return trimmed_cmd
+  end
+
+  local function remove_newlines(cmd)
+    cmd = trim_whitespace(cmd)
+    cmd = table.concat(cmd, ' ')
+    cmd = vim.split(cmd, '\n')
+    cmd = trim_whitespace(cmd)
+    cmd = table.concat(cmd, ' ')
+    return cmd
+  end
+
+  local function make_client_info(client)
+    return {
+      "",
+      "Client: "..tostring(client.id),
+      "\tname: "..client.name,
+      "\troot: "..client.workspaceFolders[1].name,
+      "\tfiletypes: "..table.concat(client.config.filetypes or {}, ', '),
+      "\tcmd: "..remove_newlines(client.config.cmd),
+    }
+  end
+
+  for _, client in ipairs(buf_clients) do
+     local client_info = make_client_info(client)
+     vim.list_extend(buf_lines, client_info)
+  end
+
+  local active_section_header = {
+    "",
+    "Total active clients: "..tostring(#clients),
+  }
+  vim.list_extend(buf_lines, active_section_header)
+  for _, client in ipairs(clients) do
+     local client_info = make_client_info(client)
+     vim.list_extend(buf_lines, client_info)
+  end
+  local matching_config_header = {
+    "",
+    "Clients that match the current buffer filetype:",
+  }
+  local cmd_not_found_msg = "False. Please check your path and ensure the server is installed"
+  vim.list_extend(buf_lines, matching_config_header)
+  for _, config in pairs(configs) do
+    local cmd_is_executable, cmd
+    if config.cmd then
+      cmd = remove_newlines(config.cmd)
+      if vim.fn.executable(config.cmd[1]) == 1 then
+        cmd_is_executable = "True"
+      else
+        cmd_is_executable = cmd_not_found_msg
+      end
+    else
+      cmd = "cmd not defined"
+      cmd_is_executable = cmd
+    end
+    if config.filetypes then
+      for _, filetype_match in ipairs(config.filetypes) do
+        if buffer_filetype == filetype_match then
+          local matching_config_info = {
+            "",
+            "Config: "..config.name,
+            "\tcmd: "..cmd,
+            "\tcmd is executable: ".. cmd_is_executable,
+            "\tidentified root: "..(config.get_root_dir(buffer_dir) or "None"),
+            "\tcustom handlers: "..table.concat(vim.tbl_keys(config.handlers), ", "),
+          }
+         vim.list_extend(buf_lines, matching_config_info)
+        end
+      end
+    else
+        local matching_config_info = {
+          "",
+          "Config: "..config.name,
+          "\tfiletype: ".."No filetypes defined, please define filetypes in setup().",
+        }
+       vim.list_extend(buf_lines, matching_config_info)
+    end
+  end
+  buf_lines = vim.lsp.util._trim_and_pad(buf_lines, { pad_left = 2, pad_top = 1})
+  vim.api.nvim_buf_set_lines(bufnr, 0, -1, true, buf_lines )
+  vim.fn.matchadd("Title", table.concat(vim.tbl_keys(configs), '\\|'))
+  vim.fn.matchadd("Error",
+    "No filetypes defined, please define filetypes in setup().\\|"..
+    "cmd not defined\\|" ..
+    cmd_not_found_msg)
+  vim.api.nvim_buf_set_keymap(bufnr, 'n', '<esc>', '<cmd>bd<CR>', { noremap = true})
+  vim.lsp.util.close_preview_autocmd({"BufHidden", "BufLeave"}, win_id)
+end;