Adapt plugin sharing (#1553)

* Reuse old package config

* Add plugin config shape

* Add ButtonGroup to core components

* List all sharing sites

* Displaying buttons from config

* First iteration of Dropdown component (need CSS)

* Using Dropdown for sharing button

* Create HotKeys component

* Move Backdrop to its own file

* Trying a cleaner API for Dropdown

* Add README.md

* livereload: Add missing gitbook-plugin dependency

* sharing: Now use Immutable state

* sharing: Adapt quickly to new Dropdown

* sharing: Fix sharing from dropdown

1 files changed, 20 insertions, 0 deletions

diff --git a/packages/gitbook-plugin-sharing/src/optionsShape.js b/packages/gitbook-plugin-sharing/src/optionsShape.js
new file mode 100644
index 0000000..dd51016
--- /dev/null
+++ b/packages/gitbook-plugin-sharing/src/optionsShape.js
@@ -0,0 +1,20 @@
+const {
+    bool,
+    arrayOf,
+    oneOf,
+    shape
+} = require('gitbook-core').React.PropTypes;
+
+const { ALL } = require('./SITES');
+
+const optionsShape = shape({
+    facebook: bool,
+    twitter: bool,
+    google: bool,
+    weibo: bool,
+    instapaper: bool,
+    vk: bool,
+    all: arrayOf(oneOf(ALL)).isRequired
+});
+
+module.exports = optionsShape;