Adds toggle for primary currency (#5421)

* Add UnitInput component

* Add CurrencyInput component

* Add UserPreferencedCurrencyInput component

* Add UserPreferencedCurrencyDisplay component

* Add updatePreferences action

* Add styles for CurrencyInput, CurrencyDisplay, and UnitInput

* Update SettingsTab page with Primary Currency toggle

* Refactor currency displays and inputs to use UserPreferenced displays and inputs

* Add TokenInput component

* Add UserPreferencedTokenInput component

* Use TokenInput in the send screen

* Fix unit tests

* Fix e2e and integration tests

* Remove send/CurrencyDisplay component

* Replace diamond unicode character with Eth logo. Fix typos

1 files changed, 45 insertions, 0 deletions

diff --git a/ui/app/components/user-preferenced-currency-display/user-preferenced-currency-display.component.js b/ui/app/components/user-preferenced-currency-display/user-preferenced-currency-display.component.js
new file mode 100644
index 000000000..4d948ca6a
--- /dev/null
+++ b/ui/app/components/user-preferenced-currency-display/user-preferenced-currency-display.component.js
@@ -0,0 +1,45 @@
+import React, { PureComponent } from 'react'
+import PropTypes from 'prop-types'
+import { PRIMARY, SECONDARY, ETH } from '../../constants/common'
+import CurrencyDisplay from '../currency-display'
+
+export default class UserPreferencedCurrencyDisplay extends PureComponent {
+  static propTypes = {
+    className: PropTypes.string,
+    prefix: PropTypes.string,
+    value: PropTypes.string,
+    numberOfDecimals: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
+    hideLabel: PropTypes.bool,
+    style: PropTypes.object,
+    showEthLogo: PropTypes.bool,
+    ethLogoHeight: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
+    // Used in container
+    type: PropTypes.oneOf([PRIMARY, SECONDARY]),
+    ethNumberOfDecimals: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
+    fiatNumberOfDecimals: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
+    ethPrefix: PropTypes.string,
+    fiatPrefix: PropTypes.string,
+    // From container
+    currency: PropTypes.string,
+  }
+
+  renderEthLogo () {
+    const { currency, showEthLogo, ethLogoHeight = 12 } = this.props
+
+    return currency === ETH && showEthLogo && (
+      <img
+        src="/images/eth.svg"
+        height={ethLogoHeight}
+      />
+    )
+  }
+
+  render () {
+    return (
+      <CurrencyDisplay
+        {...this.props}
+        prefixComponent={this.renderEthLogo()}
+      />
+    )
+  }
+}