Add composer FAB to home page

src/view/com/util/FloatingActionButton.tsx

@@ -0,0 +1,50 @@
+import React from 'react'
+import {GestureResponderEvent, StyleSheet, TouchableOpacity} from 'react-native'
+import LinearGradient from 'react-native-linear-gradient'
+import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
+import {IconProp} from '@fortawesome/fontawesome-svg-core'
+import {colors, gradients} from '../../lib/styles'
+import * as zIndex from '../../lib/z-index'
+
+type OnPress = ((event: GestureResponderEvent) => void) | undefined
+export function FAB({icon, onPress}: {icon: IconProp; onPress: OnPress}) {
+  return (
+    <TouchableOpacity style={styles.outer} onPress={onPress}>
+      <LinearGradient
+        colors={[gradients.primary.start, gradients.primary.end]}
+        start={{x: 0, y: 0}}
+        end={{x: 1, y: 1}}
+        style={styles.inner}>
+        <FontAwesomeIcon
+          size={20}
+          icon={icon}
+          color={colors.white}
+          style={styles.icon}
+        />
+      </LinearGradient>
+    </TouchableOpacity>
+  )
+}
+
+const styles = StyleSheet.create({
+  outer: {
+    position: 'absolute',
+    zIndex: zIndex.FAB,
+    right: 20,
+    bottom: 20,
+    width: 50,
+    height: 50,
+    borderRadius: 25,
+    shadowColor: '#000',
+    shadowOpacity: 0.3,
+    shadowOffset: {width: 0, height: 1},
+  },
+  inner: {
+    width: 50,
+    height: 50,
+    borderRadius: 25,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  icon: {},
+})