add 'width' option for Carbon container (#949)

* feat: add 'width' option for Carbon container

* feat: draggable width adjustment

* chore: auto disable widthAdjustment when edge starts dragging

* remove label width default; tweak settings style

* use only right width handler

* use react effects, add a11y role and props

* clean up code

* use clamp fn

* move max and min widths out of state

* give WidthHandler a display name

* tweak variable names

Co-authored-by: Mike Fix <mrfix84@gmail.com>
Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

components/Carbon.js

@@ -11,6 +11,7 @@ hljs.registerLanguage('javascript', javascript)
 
 import SpinnerWrapper from './SpinnerWrapper'
 import WindowControls from './WindowControls'
+import WidthHandler from './WidthHandler'
 
 import {
   COLORS,
@@ -201,12 +202,19 @@ class Carbon extends React.PureComponent {
           <div className="alpha eliminateOnRender" />
           <div className="bg" />
         </div>
+
+        <WidthHandler
+          innerRef={this.props.innerRef}
+          onChange={this.props.updateWidth}
+          paddingHorizontal={config.paddingHorizontal}
+        />
         <style jsx>
           {`
             .container {
               position: relative;
-              min-width: ${config.widthAdjustment ? '90px' : '680px'};
-              max-width: 1024px;
+              min-width: ${config.widthAdjustment ? '90px' : 'auto'};
+              max-width: ${config.widthAdjustment ? '1024px' : 'none'};
+              ${config.widthAdjustment ? '' : `width: ${config.width}px;`}
               padding: ${config.paddingVertical} ${config.paddingHorizontal};
             }
 
@@ -236,13 +244,16 @@ class Carbon extends React.PureComponent {
             }
 
             .container .bg {
-              ${this.props.config.backgroundMode === 'image'
+              ${
+                this.props.config.backgroundMode === 'image'
                   ? `background: url(${backgroundImage});
                     background-size: cover;
                     background-repeat: no-repeat;`
                   : `background: ${this.props.config.backgroundColor || config.backgroundColor};
                     background-size: auto;
-                    background-repeat: repeat;`} position: absolute;
+                    background-repeat: repeat;`
+              }
+              position: absolute;
               top: 0px;
               right: 0px;
               bottom: 0px;
@@ -268,9 +279,11 @@ class Carbon extends React.PureComponent {
               position: relative;
               z-index: 1;
               border-radius: 5px;
-              ${config.dropShadow
+              ${
+                config.dropShadow
                   ? `box-shadow: 0 ${config.dropShadowOffsetY} ${config.dropShadowBlurRadius} rgba(0, 0, 0, 0.55)`
-                : ''};
+                  : ''
+              };
             }
 
             .container :global(.CodeMirror__container .CodeMirror) {

components/Editor.js

@@ -112,6 +112,7 @@ class Editor extends React.Component {
   updateState = updates => this.setState(updates, () => this.onUpdate(this.state))
 
   updateCode = code => this.updateState({ code })
+  updateWidth = width => this.setState({ widthAdjustment: false, width })
 
   async getCarbonImage(
     {
@@ -438,6 +439,7 @@ class Editor extends React.Component {
                 ref={this.carbonNode}
                 config={this.state}
                 onChange={this.updateCode}
+                updateWidth={this.updateWidth}
                 loading={this.state.loading}
                 theme={theme}
               >

components/Settings.js

@@ -11,7 +11,7 @@ import Popout, { managePopout } from './Popout'
 import Button from './Button'
 import Presets from './Presets'
 import MenuButton from './MenuButton'
-import { COLORS, DEFAULT_PRESETS, DEFAULT_SETTINGS } from '../lib/constants'
+import { COLORS, DEFAULT_PRESETS, DEFAULT_SETTINGS, DEFAULT_WIDTHS } from '../lib/constants'
 import { toggle, getPresets, savePresets, generateId, fileToJSON } from '../lib/util'
 import SettingsIcon from './svg/Settings'
 
@@ -30,6 +30,7 @@ function WindowSettings({
   dropShadowOffsetY,
   windowControls,
   widthAdjustment,
+  width,
   watermark,
   onWidthChanging,
   onWidthChanged,
@@ -80,9 +81,27 @@ function WindowSettings({
         enabled={widthAdjustment}
         onChange={onChange.bind(null, 'widthAdjustment')}
       />
+      {!widthAdjustment && (
+        <div className="row settings-row width-row">
+          <Input
+            label="Width"
+            type="number"
+            value={width}
+            min={DEFAULT_WIDTHS.minWidth}
+            max={DEFAULT_WIDTHS.maxWidth}
+            onChange={e => onChange('width', e.target.value)}
+            width="50%"
+          />
+        </div>
+      )}
       <Toggle label="Watermark" enabled={watermark} onChange={onChange.bind(null, 'watermark')} />
       <style jsx>
         {`
+          .width-row {
+            justify-content: space-between;
+            padding: 8px 12px 8px 8px;
+          }
+
           .row > :global(div:first-child) {
             border-right: 1px solid ${COLORS.SECONDARY};
           }
@@ -353,6 +372,7 @@ class Settings extends React.PureComponent {
             dropShadowOffsetY={this.props.dropShadowOffsetY}
             windowControls={this.props.windowControls}
             widthAdjustment={this.props.widthAdjustment}
+            width={this.props.width}
             watermark={this.props.watermark}
           />
         )

components/WidthHandler.js

@@ -0,0 +1,73 @@
+import React from 'react'
+import { DEFAULT_WIDTHS, COLORS } from '../lib/constants'
+
+const { minWidth, maxWidth } = DEFAULT_WIDTHS
+
+function clamp(value, min, max) {
+  if (value < min) {
+    return min
+  }
+  if (value > max) {
+    return max
+  }
+  return value
+}
+
+export default function WidthHandler(props) {
+  const { onChange, innerRef, paddingHorizontal } = props
+
+  const startX = React.useRef(null)
+  const startWidth = React.useRef(null)
+
+  React.useEffect(() => {
+    function handleMouseMove(e) {
+      if (!startX.current) return
+
+      const delta = e.pageX - startX.current // leftOrRight === 'left' ? startX - e.pageX : (startX - e.pageX) * -1
+      const calculated = startWidth.current + delta * window.devicePixelRatio
+      const newWidth = clamp(calculated, minWidth, maxWidth)
+
+      onChange(newWidth)
+    }
+
+    window.addEventListener('mousemove', handleMouseMove)
+    return () => window.removeEventListener('mousemove', handleMouseMove)
+  }, [innerRef, onChange])
+
+  return (
+    // eslint-disable-next-line
+    <div
+      className="handler"
+      onMouseDown={e => {
+        startX.current = e.pageX
+        startWidth.current = innerRef.current.clientWidth
+      }}
+      onMouseUp={() => {
+        startX.current = null
+      }}
+      role="separator"
+      aria-orientation="vertical"
+      aria-valuemin={minWidth}
+      aria-valuemax={maxWidth}
+    >
+      <style jsx>
+        {`
+          .handler {
+            z-index: 2;
+            position: absolute;
+            background-color: ${COLORS.BLUE};
+            top: ${paddingHorizontal};
+            bottom: ${paddingHorizontal};
+            right: ${paddingHorizontal};
+            width: 8px;
+            cursor: ew-resize;
+            opacity: 0;
+          }
+          .handler:hover {
+            opacity: 0.4;
+          }
+        `}
+      </style>
+    </div>
+  )
+}

lib/constants.js

@@ -1092,6 +1092,12 @@ export const DEFAULT_SETTINGS = {
   squaredImage: false,
   hiddenCharacters: false,
   name: '',
+  width: 680,
+}
+
+export const DEFAULT_WIDTHS = {
+  minWidth: 320,
+  maxWidth: 1280,
 }
 
 export const DEFAULT_PRESETS = [