Moved away from react-codemirror2 to interacting with codemirror directly.

src/components/layers/JSONEditor.jsx

@@ -1,9 +1,9 @@
 import React from 'react'
 import PropTypes from 'prop-types'
 
-import {Controlled as CodeMirror} from 'react-codemirror2'
 import InputBlock from '../inputs/InputBlock'
 import StringInput from '../inputs/StringInput'
+import CodeMirror from 'codemirror';
 
 import 'codemirror/mode/javascript/javascript'
 import 'codemirror/addon/lint/lint'
@@ -25,36 +25,82 @@ class JSONEditor extends React.Component {
   constructor(props) {
     super(props)
     this.state = {
-      code: JSON.stringify(props.layer, null, 2)
+      isEditing: false,
+      prevValue: this.getValue(),
+    };
   }
+
+  getValue () {
+    return JSON.stringify(this.props.layer, null, 2);
+  }
+
+  componentDidMount () {
+    this._doc = CodeMirror(this._el, {
+      value: this.getValue(),
+      mode: {
+        name: "javascript",
+        json: true
+      },
+      tabSize: 2,
+      theme: 'maputnik',
+      viewportMargin: Infinity,
+      lineNumbers: true,
+      lint: true,
+      gutters: ["CodeMirror-lint-markers"],
+      scrollbarStyle: "null",
+    });
+
+    this._doc.on('change', this.onChange);
+    this._doc.on('focus', this.onFocus);
+    this._doc.on('blur', this.onBlur);
+  }
+
+  onFocus = () => {
+    this.setState({
+      isEditing: true
+    });
+  }
+
+  onBlur = () => {
+    this.setState({
+      isEditing: false
+    });
+  }
+
+  componentWillUnMount () {
+    this._doc.off('change', this.onChange);
+    this._doc.off('focus', this.onFocus);
+    this._doc.off('blur', this.onBlur);
   }
 
   componentDidUpdate(prevProps) {
-    if (prevProps.layer !== this.props.layer) {
-      this.setState({
-        code: JSON.stringify(this.props.layer, null, 2)
-      })
+    if (!this.state.isEditing && prevProps.layer !== this.props.layer) {
+      this._cancelNextChange = true;
+      this._doc.setValue(
+        this.getValue(),
+      )
     }
   }
 
-  onCodeUpdate(newCode) {
+  onChange = (e) => {
+    if (this._cancelNextChange) {
+      this._cancelNextChange = false;
+      return;
+    }
+    const newCode = this._doc.getValue();
+
+    if (this.state.prevValue !== newCode) {
       try {
         const parsedLayer = JSON.parse(newCode)
         this.props.onChange(parsedLayer)
       } catch(err) {
         console.warn(err)
-    } finally {
-      this.setState({
-        code: newCode
-      })
       }
     }
 
-  resetValue() {
-    console.log('reset')
     this.setState({
-      code: JSON.stringify(this.props.layer, null, 2)
-    })
+      prevValue: newCode,
+    });
   }
 
   render() {
@@ -69,12 +115,7 @@ class JSONEditor extends React.Component {
       scrollbarStyle: "null",
     }
 
-    return <CodeMirror
-      value={this.state.code}
-      onBeforeChange={(editor, data, value) => this.onCodeUpdate(value)}
-      onFocusChange={focused => focused ? true : this.resetValue()}
-      options={codeMirrorOptions}
-    />
+    return <div ref={(el) => this._el = el} />
   }
 }