docs(flygrep): update flygrep readme

bundle/FlyGrep/README.md

@@ -1,55 +1,78 @@
 # FlyGrep.vim
-> Asynchronously fly grep in vim
 
-This plugin is automatically detach from [SpaceVim](https://github.com/SpaceVim/SpaceVim/). you can use it without SpaceVim.
+[![](https://spacevim.org/img/build-with-SpaceVim.svg)](https://spacevim.org)
+[![GPLv3 License](https://img.spacevim.org/license-GPLv3-blue.svg)](LICENSE)
 
 ![searching project](https://img.spacevim.org/35278709-7856ed62-0010-11e8-8b1e-e6cc6374b0dc.gif)
 
+<!-- vim-markdown-toc GFM -->
+
+- [Intro](#intro)
+- [Install](#install)
+- [Usage](#usage)
+  - [Command](#command)
+  - [Key bindings in FlyGrep window](#key-bindings-in-flygrep-window)
+- [FeedBack](#feedback)
+
+<!-- vim-markdown-toc -->
+
+## Intro
+
+_FlyGrep.vim_ is a vim/neovim plugin to run the searching tool asynchronously, and display the result on the fly.
+
 ## Install
 
-for dein.vim
+Using [dein.vim](https://github.com/Shougo/dein.vim)
 
 ```vim
 call dein#add('wsdjeg/FlyGrep.vim')
 ```
 
-for vim-plug
+Using [vim-plug](https://github.com/junegunn/vim-plug)
 
 ```vim
 Plug 'wsdjeg/FlyGrep.vim'
 ```
 
-## usage
+## Usage
+
+### Command
+
+This plugin provides a `:FlyGrep` command.
 
 ```
 :FlyGrep
 ```
 
-you also can define custom mapping, for example:
+### Key bindings in FlyGrep window
 
-```vim
-nnoremap <Space>s/ :FlyGrep<cr>
-```
+| Key Bindings       | Descriptions                                  |
+| ------------------ | --------------------------------------------- |
+| Tab / Ctrl-j       | move cursor to next item                      |
+| Shift-Tab / Ctrl-K | move cursor to previous item                  |
+| ScrollWheelDown    | move cursor to next item                      |
+| ScrollWheelUp      | move cursor to previous item                  |
+| Enter              | open file at the cursor line                  |
+| Ctrl-t             | open item in new tab                          |
+| LeftMouse          | move cursor to mouse position                 |
+| 2-LeftMouse        | open file at the mouse position               |
+| Ctrl-f             | start filter mode                             |
+| Ctrl-v             | open item in vertical split window            |
+| Ctrl-s             | open item in split window                     |
+| Ctrl-q             | apply all items into quickfix                 |
+| Ctrl-e             | toggle fix-string mode                        |
+| Ctrl-h             | toggle display hidden files                   |
+| Ctrl-r             | read from register, need insert register name |
+| Left / Right       | move cursor to left or right                  |
+| BackSpace          | remove last character                         |
+| Ctrl-w             | remove the Word before the cursor             |
+| Ctrl-u             | remove the Line before the cursor             |
+| Ctrl-k             | remove the Line after the cursor              |
+| Ctrl-a / Home      | Go to the beginning of the line               |
+| End                | Go to the end of the line                     |
 
-Key Binding |	Description
------------| -----------
-`SPC s /` | Searching in project on the fly with default tools
+## FeedBack
 
-key binding in FlyGrep buffer:
-
-Key Binding |	Description
------------| -----------
-`<Esc>` | close FlyGrep buffer
-`<C-c>` | close FlyGrep buffer
-`<Enter>` | open file at the cursor line
-`<Tab>` | move cursor line down
-`<C-j>` | move cursor line down
-`<S-Tab>` | move cursor line up
-`<C-k>` | move cursor line up
-`<Bs>` | remove last character
-`<C-w>` | remove the Word before the cursor
-`<C-u>` | remove the Line before the cursor
-`<C-k>` | remove the Line after the cursor
-`<C-a>`/`<Home>` | Go to the beginning of the line
-`<C-e>`/`<End>` | Go to the end of the line
+The development of this plugin is in [`SpaceVim/bundle/FlyGrep`](https://github.com/SpaceVim/SpaceVim/tree/master/bundle/FlyGrep) directory.
 
+If you encounter any bugs or have suggestions, please file an issue in the [issue tracker](https://github.com/SpaceVim/SpaceVim/issues)