Add copy link button in market share options

web/components/contract/contract-info-dialog.tsx

@@ -12,6 +12,7 @@ import {
   contractPath,
   getBinaryProbPercent,
 } from '../../lib/firebase/contracts'
+import { CopyLinkButton } from '../copy-link-button'
 import { Col } from '../layout/col'
 import { Modal } from '../layout/modal'
 import { Row } from '../layout/row'
@@ -100,6 +101,7 @@ export function ContractInfoDialog(props: { contract: Contract }) {
           <div className="text-gray-500">Share</div>
 
           <Row className="justify-start gap-4">
+            <CopyLinkButton contract={contract} />
             <TweetButton
               className="self-start"
               tweetText={getTweetText(contract, false)}

web/components/copy-link-button.tsx

@@ -0,0 +1,50 @@
+import { Fragment } from 'react'
+import { LinkIcon } from '@heroicons/react/outline'
+import { Menu, Transition } from '@headlessui/react'
+import { Contract } from '../../common/contract'
+import { copyToClipboard } from '../lib/util/copy'
+
+function copyCurrentUrl(contract: Contract) {
+  const url = window.location.href
+  copyToClipboard(url)
+}
+
+export function CopyLinkButton(props: { contract: Contract }) {
+  const { contract } = props
+
+  return (
+    <Menu
+      as="div"
+      className="relative z-10 flex-shrink-0"
+      onMouseUp={() => copyCurrentUrl(contract)}
+    >
+      <Menu.Button
+        className="btn btn-xs normal-case"
+        style={{
+          backgroundColor: 'white',
+          border: '2px solid #16A34A',
+          color: '#16A34A', // text-green-600
+        }}
+      >
+        <LinkIcon className="mr-1.5 h-4 w-4" aria-hidden="true" />
+        Copy link
+      </Menu.Button>
+
+      <Transition
+        as={Fragment}
+        enter="transition ease-out duration-100"
+        enterFrom="transform opacity-0 scale-95"
+        enterTo="transform opacity-100 scale-100"
+        leave="transition ease-in duration-75"
+        leaveFrom="transform opacity-100 scale-100"
+        leaveTo="transform opacity-0 scale-95"
+      >
+        <Menu.Items className="origin-top-center absolute left-0 mt-2 w-40 rounded-md bg-white py-1 shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none">
+          <Menu.Item>
+            <div className="px-2 py-1">Link copied!</div>
+          </Menu.Item>
+        </Menu.Items>
+      </Transition>
+    </Menu>
+  )
+}