add sendmax and button link for the amount field in sending funds form

package.json

@@ -81,6 +81,7 @@
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "react-final-form": "5.1.0",
+    "react-final-form-listeners": "^1.0.2",
     "react-hot-loader": "4.8.7",
     "react-infinite-scroll-component": "^4.5.2",
     "react-redux": "7.0.3",

src/components/forms/GnoForm/index.jsx

@@ -15,6 +15,7 @@ type Props = {
   padding?: number,
   validation?: (values: Object) => Object | Promise<Object>,
   initialValues?: Object,
+  formMutators: Object,
 }
 
 const stylesBasedOn = (padding: number): $Shape<CSSStyleDeclaration> => ({
@@ -24,15 +25,16 @@ const stylesBasedOn = (padding: number): $Shape<CSSStyleDeclaration> => ({
 })
 
 const GnoForm = ({
-  onSubmit, validation, initialValues, children, padding = 0,
+  onSubmit, validation, initialValues, children, padding = 0, formMutators,
 }: Props) => (
   <Form
     validate={validation}
     onSubmit={onSubmit}
     initialValues={initialValues}
+    mutators={formMutators}
     render={({ handleSubmit, ...rest }) => (
       <form onSubmit={handleSubmit} style={stylesBasedOn(padding)}>
-        {children(rest.submitting, rest.validating, rest)}
+        {children(rest.submitting, rest.validating, rest, rest.form.mutators)}
       </form>
     )}
   />

src/components/layout/ButtonLink/index.jsx

@@ -0,0 +1,29 @@
+// @flow
+/* eslint-disable react/button-has-type  */
+/* eslint-disable react/default-props-match-prop-types */
+import * as React from 'react'
+import cn from 'classnames/bind'
+import styles from './index.scss'
+
+const cx = cn.bind(styles)
+
+type Props = {
+  type: 'button' | 'submit' | 'reset',
+  size?: 'sm' | 'md' | 'lg' | 'xl' | 'xxl',
+  weight?: 'light' | 'regular' | 'bolder' | 'bold',
+  color?: 'soft' | 'medium' | 'dark' | 'white' | 'fancy' | 'primary' | 'secondary' | 'warning' | 'disabled',
+}
+
+const GnoButtonLink = ({ type, size, weight, color, ...props }: Props) => (
+  <button type={type} className={cx(styles.btnLink, size, color, weight)} {...props} />
+)
+
+
+GnoButtonLink.defaultProps = {
+  type: 'button',
+  size: 'md',
+  weight: 'regular',
+  color: 'secondary',
+}
+
+export default GnoButtonLink

src/components/layout/ButtonLink/index.scss

@@ -0,0 +1,79 @@
+.btnLink {
+  background: transparent;
+  border: none;
+  text-decoration: underline;
+  font-family: 'Roboto Mono', monospace;
+  cursor: pointer;
+}
+
+.sm {
+  font-size: $smallFontSize;
+}
+
+.md {
+  font-size: $mediumFontSize;
+}
+
+.lg {
+  font-size: $largeFontSize;
+}
+
+.xl {
+  font-size: $extraLargeFontSize;
+}
+
+.xxl {
+  font-size: $xxlFontSize;
+}
+
+.light {
+  font-weight: $lightFont;
+}
+
+.regular {
+  font-weight: $regularFont;
+}
+
+.bolder {
+  font-weight: $bolderFont;
+}
+
+.bold {
+  font-weight: $boldFont;
+}
+
+.soft {
+  color: #888888;
+}
+
+.medium {
+  color: #686868;
+}
+
+.dark {
+  color: black;
+}
+
+.fancy {
+  color: $fancy;
+}
+
+.warning {
+  color: $warning;
+}
+
+.primary {
+  color: $fontColor;
+}
+
+.secondary {
+  color: $secondary;
+}
+
+.disabled {
+  color: $disabled;
+}
+
+.white {
+  color: white;
+}

src/components/layout/Row/index.jsx

@@ -9,7 +9,7 @@ const cx = classNames.bind(styles)
 type Props = {
   className?: string,
   children: React$Node,
-  margin?: 'sm' | 'md' | 'lg' | 'xl',
+  margin?: 'xs' | 'sm' | 'md' | 'lg' | 'xl',
   align?: 'center' | 'end' | 'start',
   grow?: boolean,
 }

src/components/layout/Row/index.scss

@@ -7,6 +7,11 @@
 .grow {
   flex: 1 1 auto;
 }
+
+.marginXs {
+  margin-bottom: $xs;
+}
+
 .marginSm {
   margin-bottom: $sm;
 }

src/routes/safe/components/Balances/SendModal/screens/SendFunds/TokenSelectField/index.jsx

@@ -1,6 +1,7 @@
 // @flow
 import React from 'react'
 import { List } from 'immutable'
+import { OnChange } from 'react-final-form-listeners'
 import { withStyles } from '@material-ui/core/styles'
 import MenuItem from '@material-ui/core/MenuItem'
 import ListItemIcon from '@material-ui/core/ListItemIcon'
@@ -17,6 +18,7 @@ import { selectedTokenStyles, selectStyles } from './style'
 type SelectFieldProps = {
   tokens: List<Token>,
   classes: Object,
+  onTokenChange: Function,
 }
 
 type SelectedTokenProps = {
@@ -47,7 +49,7 @@ const SelectedToken = ({ token, classes }: SelectedTokenProps) => (
 
 const SelectedTokenStyled = withStyles(selectedTokenStyles)(SelectedToken)
 
-const TokenSelectField = ({ tokens, classes }: SelectFieldProps) => (
+const TokenSelectField = ({ tokens, onTokenChange, classes }: SelectFieldProps) => (
   <Field
     name="token"
     component={SelectField}
@@ -65,6 +67,11 @@ const TokenSelectField = ({ tokens, classes }: SelectFieldProps) => (
         <ListItemText primary={token.name} secondary={`${token.balance} ${token.symbol}`} />
       </MenuItem>
     ))}
+    <OnChange name="token">
+      {() => {
+        onTokenChange()
+      }}
+    </OnChange>
   </Field>
 )
 

src/routes/safe/components/Balances/SendModal/screens/SendFunds/index.jsx

@@ -11,11 +11,12 @@ import Row from '~/components/layout/Row'
 import GnoForm from '~/components/forms/GnoForm'
 import Link from '~/components/layout/Link'
 import Col from '~/components/layout/Col'
-import Field from '~/components/forms/Field'
-import TextField from '~/components/forms/TextField'
 import Block from '~/components/layout/Block'
 import Bold from '~/components/layout/Bold'
 import Hairline from '~/components/layout/Hairline'
+import ButtonLink from '~/components/layout/ButtonLink'
+import Field from '~/components/forms/Field'
+import TextField from '~/components/forms/TextField'
 import {
   lg, md, sm, secondary, xs,
 } from '~/theme/variables'
@@ -73,6 +74,16 @@ const SendFunds = ({
   classes, onClose, safeAddress, etherScanLink, safeName, ethBalance, tokens,
 }: Props) => {
   const handleSubmit = () => {}
+  const formMutators = {
+    setMax: (args, state, utils) => {
+      const { token } = state.formState.values
+
+      utils.changeValue(state, 'amount', () => token && token.balance)
+    },
+    onTokenChange: (args, state, utils) => {
+      utils.changeValue(state, 'amount', () => '')
+    },
+  }
 
   return (
     <React.Fragment>
@@ -121,8 +132,10 @@ ETH
             <Hairline />
           </Col>
         </Row>
-        <GnoForm onSubmit={handleSubmit}>
-          {() => (
+        <GnoForm onSubmit={handleSubmit} formMutators={formMutators}>
+          {(...args) => {
+            const mutators = args[3]
+            return (
               <React.Fragment>
                 <Row margin="md">
                   <Col xs={12}>
@@ -137,16 +150,23 @@ ETH
                     />
                   </Col>
                 </Row>
-              <Row>
+                <Row margin="sm">
                   <Col>
-                  <TokenSelectField tokens={tokens} />
+                    <TokenSelectField tokens={tokens} onTokenChange={mutators.onTokenChange} />
+                  </Col>
+                </Row>
+                <Row margin="xs">
+                  <Col between="lg">
+                    <Paragraph size="md" color="disabled" style={{ letterSpacing: '-0.5px' }} noMargin>
+                      Amount
+                    </Paragraph>
+                    <ButtonLink weight="bold" onClick={mutators.setMax}>
+                      Send max
+                    </ButtonLink>
                   </Col>
                 </Row>
                 <Row>
-                <Col layout="column">
-                  <Paragraph size="md" color="disabled" style={{ letterSpacing: '-0.5px' }}>
-                    Amount
-                  </Paragraph>
+                  <Col>
                     <Field
                       name="amount"
                       component={TextField}
@@ -159,7 +179,8 @@ ETH
                   </Col>
                 </Row>
               </React.Fragment>
-          )}
+            )
+          }}
         </GnoForm>
       </Block>
     </React.Fragment>

yarn.lock

@@ -1416,7 +1416,7 @@
   dependencies:
     regenerator-runtime "^0.13.2"
 
-"@babel/runtime@^7.4.4":
+"@babel/runtime@^7.1.5", "@babel/runtime@^7.4.4":
   version "7.4.4"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.4.4.tgz#dc2e34982eb236803aa27a07fea6857af1b9171d"
   integrity sha512-w0+uT71b6Yi7i5SE0co4NioIpSYS6lLiXvCzWzGSKvpK5vdQtCbICHMj+gbAKAOtxiV6HsVh/MBdaF9EQ6faSg==
@@ -13669,6 +13669,13 @@ react-fast-compare@^2.0.2:
   resolved "https://registry.yarnpkg.com/react-fast-compare/-/react-fast-compare-2.0.4.tgz#e84b4d455b0fec113e0402c329352715196f81f9"
   integrity sha512-suNP+J1VU1MWFKcyt7RtjiSWUjvidmQSlqu+eHslq+342xCbGTYmC0mEhPCOHxlW0CywylOC1u2DFAT+bv4dBw==
 
+react-final-form-listeners@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/react-final-form-listeners/-/react-final-form-listeners-1.0.2.tgz#b52da984300281cf1f69a6412e86df6249e2bf1c"
+  integrity sha512-AaUUHcXRhD3esC80yUfYPI8FJ3TUiMu0f4hk18QL8NMCWjokg6NWS32WkRJsH3bLWDoiy7+uNVOAAyO/XoupyA==
+  dependencies:
+    "@babel/runtime" "^7.1.5"
+
 react-final-form@5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/react-final-form/-/react-final-form-5.1.0.tgz#f9402dfdf9325e5605cd8c9c7f4ef3e9ecf0702c"