feat(lang#c): update lsp key binding for lang#c layer

autoload/SpaceVim/layers/lang/c.vim

@@ -65,10 +65,12 @@
 " `clang_std` layer option.
 "
 " @subsection Key bindings
+"
 " >
-"   Mode            Key             Function
+"   Key             Function
-"   ---------------------------------------------
+"   --------------------------------
-"   normal          SPC l r         run current file
+"   SPC l r         run current file
+"   g d             jump to definition
 " <
 "
 " This layer also provides REPL support for c, the key bindings are:
@@ -81,6 +83,22 @@
 "   SPC l s s       send selection text
 " <
 "
+" If the lsp layer is enabled for c/c++, the following key bindings can
+" be used:
+" >
+"   key binding     Description
+"   --------------------------------
+"   g D             jump to declaration
+"   SPC l e         rename symbol
+"   SPC l x         show references
+"   SPC l h         show line diagnostics
+"   SPC l d         show document
+"   K               show document
+"   SPC l w l       list workspace folder
+"   SPC l w a       add workspace folder
+"   SPC l w r       remove workspace folder
+" <
+"
 " Known issue:
 "
 " You need to use `flush(stdout)` before `scanf()` when run code in code
@@ -301,25 +319,26 @@ function! s:language_specified_mappings() abort
         \ 'call SpaceVim#plugins#runner#open()',
         \ 'execute current file', 1)
   if SpaceVim#layers#lsp#check_filetype('c')
+        \ || SpaceVim#layers#lsp#check_server('clangd')
     nnoremap <silent><buffer> K :call SpaceVim#lsp#show_doc()<CR>
 
     call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'd'],
           \ 'call SpaceVim#lsp#show_doc()', 'show_document', 1)
     call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'e'],
           \ 'call SpaceVim#lsp#rename()', 'rename symbol', 1)
-    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'f'],
+    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'x'],
-          \ 'call SpaceVim#lsp#references()', 'references', 1)
+          \ 'call SpaceVim#lsp#references()', 'show-references', 1)
-
-    " these work for now with coc.nvim only
-
     call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'i'],
           \ 'call SpaceVim#lsp#go_to_impl()', 'implementation', 1)
-    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 't'],
+    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'h'],
-          \ 'call SpaceVim#lsp#go_to_typedef()', 'type definition', 1)
+          \ 'call SpaceVim#lsp#show_line_diagnostics()', 'show-line-diagnostics', 1)
-    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'R'],
+    let g:_spacevim_mappings_space.l.w = {'name' : '+Workspace'}
-          \ 'call SpaceVim#lsp#refactor()', 'refactor', 1)
+    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'w', 'l'],
-    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'D'],
+          \ 'call SpaceVim#lsp#list_workspace_folder()', 'list-workspace-folder', 1)
-          \ 'call SpaceVim#lsp#go_to_declaration()', 'declaration', 1)
+    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'w', 'a'],
+          \ 'call SpaceVim#lsp#add_workspace_folder()', 'add-workspace-folder', 1)
+    call SpaceVim#mapping#space#langSPC('nnoremap', ['l', 'w', 'r'],
+          \ 'call SpaceVim#lsp#remove_workspace_folder()', 'remove-workspace-folder', 1)
 
   endif
   let g:_spacevim_mappings_space.l.s = {'name' : '+Send'}
@@ -463,6 +482,7 @@ endfunction
 " local function: go_to_declaration {{{
 function! s:go_to_declaration() abort
   if !SpaceVim#layers#lsp#check_filetype(&ft)
+        \ && !SpaceVim#layers#lsp#check_server('clangd')
     try
       exe 'ts' expand('<cword>')
     catch /^Vim\%((\a\+)\)\=:E426/
@@ -479,6 +499,7 @@ endfunction
 " local function: go_to_def {{{
 function! s:go_to_def() abort
   if !SpaceVim#layers#lsp#check_filetype(&ft)
+        \ && !SpaceVim#layers#lsp#check_server('clangd')
     try
       exe 'ts' expand('<cword>')
     catch /^Vim\%((\a\+)\)\=:E426/

doc/SpaceVim.txt

@@ -2394,10 +2394,12 @@ Note: If `.clang` file contains std configuration, it will override
 
 KEY BINDINGS
 
+
 >
-  Mode            Key             Function
+  Key             Function
-  ---------------------------------------------
+  --------------------------------
-  normal          SPC l r         run current file
+  SPC l r         run current file
+  g d             jump to definition
 <
 
 This layer also provides REPL support for c, the key bindings are:
@@ -2410,6 +2412,21 @@ This layer also provides REPL support for c, the key bindings are:
   SPC l s s       send selection text
 <
 
+If the lsp layer is enabled for c/c++, the following key bindings can be used:
+>
+  key binding     Description
+  --------------------------------
+  g D             jump to declaration
+  SPC l e         rename symbol
+  SPC l x         show references
+  SPC l h         show line diagnostics
+  SPC l d         show document
+  K               show document
+  SPC l w l       list workspace folder
+  SPC l w a       add workspace folder
+  SPC l w r       remove workspace folder
+<
+
 Known issue:
 
 You need to use `flush(stdout)` before `scanf()` when run code in code runner.

docs/layers/lang/c.md

@@ -12,6 +12,10 @@ description: "C/C++/Object-C language support for SpaceVim, including code compl
 - [Features](#features)
 - [Configuration](#configuration)
 - [Key bindings](#key-bindings)
+  - [Jump to definition](#jump-to-definition)
+  - [Running current script](#running-current-script)
+  - [Inferior REPL process](#inferior-repl-process)
+  - [LSP key Bindings](#lsp-key-bindings)
 
 <!-- vim-markdown-toc -->
 
@@ -55,10 +59,10 @@ A dict containing the standards you want to use. The default is:
 
 ```json
 {
-    "c": "c11",
+  "c": "c11",
-    "cpp": "c++1z",
+  "cpp": "c++1z",
-    "objc": "c11",
+  "objc": "c11",
-    "objcpp": "c++1z",
+  "objcpp": "c++1z"
 }
 ```
 
@@ -95,18 +99,51 @@ Note: If `.clang` file contains std configuration, it will override
 
 `format_on_save`: Enable/disable file formatting when saving current file. By default,
 it is disabled, to enable it:
+
 ```toml
 [[layers]]
     name = 'lang#c'
     format_on_save = true
-  ```
+```
 
 ## Key bindings
 
-| key bindings | Descriptions                     |
+### Jump to definition
-| ------------ | -------------------------------- |
+
-| `SPC l d`    | show documentation               |
+| Mode   | Key Bindings | Description                                      |
-| `SPC l e`    | rename symbol                    |
+| ------ | ------------ | ------------------------------------------------ |
-| `SPC l f`    | references                       |
+| normal | `g d`        | Jump to the definition position of cursor symbol |
-| `SPC l r`    | compile and run the current file |
+
-| `g d`        | defintion preview                |
+### Running current script
+
+To run current file, you can press `SPC l r` to run the current file without losing focus,
+and the result will be shown in a runner buffer.
+
+### Inferior REPL process
+
+Start a `igcc` inferior REPL process with `SPC l s i`.
+
+Send code to inferior process commands:
+
+| Key Bindings | Descriptions                                     |
+| ------------ | ------------------------------------------------ |
+| `SPC l s b`  | send buffer and keep code buffer focused         |
+| `SPC l s l`  | send line and keep code buffer focused           |
+| `SPC l s s`  | send selection text and keep code buffer focused |
+
+### LSP key Bindings
+
+If the lsp layer is enabled for C/C++, the following key bindings can
+be used:
+
+| key binding | Description             |
+| ----------- | ----------------------- |
+| `g D`       | jump to declaration     |
+| `SPC l e`   | rename symbol           |
+| `SPC l x`   | show references         |
+| `SPC l s`   | show line diagnostics   |
+| `SPC l d`   | show document           |
+| `K`         | show document           |
+| `SPC l w l` | list workspace folder   |
+| `SPC l w a` | add workspace folder    |
+| `SPC l w r` | remove workspace folder |