Add error handle key bindings to lsp layer (#2774)

autoload/SpaceVim/layers/lsp.vim

@@ -71,6 +71,28 @@ function! SpaceVim#layers#lsp#config() abort
     let g:LanguageClient_diagnosticsDisplay[4].signTexthl = 'ALEInfoSign'
   endif
 
+
+  if !SpaceVim#layers#isLoaded('checkers')
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'c'], 'call call('
+          \ . string(s:_function('s:clear_errors')) . ', [])',
+          \ 'clear all errors', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'n'], 'call call('
+          \ . string(s:_function('s:jump_to_next_error')) . ', [])',
+          \ 'next-error', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'p'], 'call call('
+          \ . string(s:_function('s:jump_to_previous_error')) . ', [])',
+          \ 'previous-error', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'N'], 'call call('
+          \ . string(s:_function('s:jump_to_previous_error')) . ', [])',
+          \ 'previous-error', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'l'], 'call call('
+          \ . string(s:_function('s:toggle_show_error')) . ', [0])',
+          \ 'toggle showing the error list', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['e', 'L'], 'call call('
+          \ . string(s:_function('s:toggle_show_error')) . ', [1])',
+          \ 'toggle showing the error list', 1)
+  endif
+
   let g:LanguageClient_autoStart = 1
   let g:lsp_async_completion = 1
   " }}}
@@ -126,3 +148,70 @@ endfunction
 function! SpaceVim#layers#lsp#check_filetype(ft) abort
   return index(s:enabled_fts, a:ft) != -1
 endfunction
+
+function! s:jump_to_next_error() abort
+  try
+    lnext
+  catch
+    try
+      cnext
+    catch
+      echohl WarningMsg
+      echon 'There is no errors!'
+      echohl None
+    endtry
+  endtry
+endfunction
+
+function! s:jump_to_previous_error() abort
+  try
+    lprevious
+  catch
+    try
+      cprevious
+    catch
+      echohl WarningMsg
+      echon 'There is no errors!'
+      echohl None
+    endtry
+  endtry
+endfunction
+
+function! s:toggle_show_error(...) abort
+  try
+    botright lopen
+  catch
+    try
+      if len(getqflist()) == 0
+        echohl WarningMsg
+        echon 'There is no errors!'
+        echohl None
+      else
+        botright copen
+      endif
+    catch
+    endtry
+  endtry
+  if a:1 == 1
+    wincmd w
+  endif
+endfunction
+
+if v:version > 703 || v:version == 703 && has('patch1170')
+  function! s:_function(fstr) abort
+    return function(a:fstr)
+  endfunction
+else
+  function! s:_SID() abort
+    return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze__SID$')
+  endfunction
+  let s:_s = '<SNR>' . s:_SID() . '_'
+  function! s:_function(fstr) abort
+    return function(substitute(a:fstr, 's:', s:_s, 'g'))
+  endfunction
+endif
+
+" TODO clear errors
+function! s:clear_errors() abort
+  sign unplace *
+endfunction

docs/cn/layers/language-server-protocol.md

@@ -168,3 +168,14 @@ gem install solargraph
 | --------------- | ------------- |
 | `K` / `SPC l d` | 显示文档      |
 | `SPC l e`       | 重命名 symbol |
+
+如果 `checkers` 模块未载入，则以下快捷键将被引入：
+
+| 快捷键    | 功能描述                        |
+| --------- | ------------------------------- |
+| `SPC e c` | 清除错误列表                    |
+| `SPC e n` | 跳至下一个语法错误位置          |
+| `SPC e N` | 跳至上一个语法错误位置          |
+| `SPC e p` | 跳至上一个语法错误位置          |
+| `SPC e l` | 列出错误列表窗口                |
+| `SPC e L` | 列出错误列表窗口并跳至该窗口    |

docs/layers/language-server-protocol.md

@@ -156,7 +156,7 @@ default language server commands:
 | `php`        | `['php', 'path/to/bin/php-language-server.php']`                                                                                                                                                 |
 | `purescript` | `['purescript-language-server', '--stdio']`                                                                                                                                                      |
 | `python`     | `['pyls']`                                                                                                                                                                                       |
-| `ruby`       | `['solargraph',  'stdio']`
+| `ruby`       | `['solargraph', 'stdio']`                                                                                                                                                                        |
 | `rust`       | `['rustup', 'run', 'nightly', 'rls']`                                                                                                                                                            |
 | `sh`         | `['bash-language-server', 'start']`                                                                                                                                                              |
 | `typescript` | `['typescript-language-server', '--stdio']`                                                                                                                                                      |
@@ -181,3 +181,14 @@ To override the server command, you may need to use `override_cmd` option:
 | --------------- | ------------- |
 | `K` / `SPC l d` | show document |
 | `SPC l e`       | rename symbol |
+
+if the checkers layer is not loaded, these key bindings will be added:
+
+| Key       | description                                                  |
+| --------- | ------------------------------------------------------------ |
+| `SPC e c` | clear errors                                                 |
+| `SPC e n` | jump to the position of next error                           |
+| `SPC e N` | jump to the position of previous error                       |
+| `SPC e p` | jump to the position of previous error                       |
+| `SPC e l` | display a list of all the errors                             |
+| `SPC e L` | display a list of all the errors and focus the errors buffer |