Refactor preset state (#822)

* refactor preset state

* remove unnecessary constant

components/Editor.js

@@ -25,7 +25,6 @@ import {
   DEFAULT_CODE,
   DEFAULT_SETTINGS,
   DEFAULT_LANGUAGE,
-  DEFAULT_PRESET_ID,
   DEFAULT_THEME,
   FONTS
 } from '../lib/constants'
@@ -46,7 +45,6 @@ class Editor extends React.Component {
     super(props)
     this.state = {
       ...DEFAULT_SETTINGS,
-      preset: DEFAULT_PRESET_ID,
       loading: true
     }
 
@@ -221,7 +219,7 @@ class Editor extends React.Component {
 
   updateSetting(key, value) {
     this.updateState({ [key]: value })
-    if (Object.prototype.hasOwnProperty.call(DEFAULT_SETTINGS, key)) {
+    if (Object.prototype.hasOwnProperty.call(DEFAULT_SETTINGS, key) && key !== 'preset') {
       this.updateState({ preset: null })
     }
   }
@@ -246,7 +244,7 @@ class Editor extends React.Component {
   }
 
   resetDefaultSettings() {
-    this.updateState({ ...DEFAULT_SETTINGS, preset: DEFAULT_PRESET_ID })
+    this.updateState(DEFAULT_SETTINGS)
     this.props.onReset()
   }
 

lib/constants.js

@@ -1017,16 +1017,15 @@ export const DEFAULT_SETTINGS = {
   lineNumbers: false,
   exportSize: '2x',
   watermark: false,
-  squaredImage: false
+  squaredImage: false,
+  preset: 'preset:4'
 }
 
-export const DEFAULT_PRESET_ID = 'preset:4'
-
 export const DEFAULT_PRESETS = [
   {
     ...DEFAULT_SETTINGS,
     icon: '/static/presets/4.png',
-    id: DEFAULT_PRESET_ID
+    id: 'preset:4'
   },
   {
     ...DEFAULT_SETTINGS,