initial commit

comps/CodeMirror.js

@@ -0,0 +1,65 @@
+import { Component } from 'react'; 
+import cm from 'codemirror'; 
+import { getKey, isCtrlKey } from '../util/keys'; 
+
+if(typeof window !== 'undefined') {
+  require('codemirror/mode/markdown/markdown'); 
+}
+export default class CodeMirror extends Component {
+  handleChange = () => {
+    if(!this.editor) return; 
+    const value = this.editor.getValue();
+    if(value !== this.props.value) {
+      this.props.onChange && this.props.onChange(value);
+      if(this.editor.getValue() !== this.props.value) {
+        if(this.state.isControlled) {
+          this.editor.setValue(this.props.value);
+        } else {
+          this.props.value = value;
+        }
+      }
+    }
+  }
+  checkSubmit = (cm, e) => {
+    const key = getKey(e); 
+    if(isCtrlKey(key)) {
+      this.ctrlKey = true; 
+    } else if(key === 13 && this.ctrlKey) {
+      this.props.onSubmit(); 
+    } 
+  }
+  handleKeyUp = (cm, e) => {
+    if(isCtrlKey(getKey(e))) this.ctrlKey = false; 
+  }
+  componentDidMount() {
+    if(typeof window === 'undefined') return;
+    this.editor = cm.fromTextArea(this.textarea, this.props.options); 
+    this.editor.on('change', this.handleChange); 
+    if(typeof this.props.onSubmit === 'function') {
+      this.editor.on('keydown', this.checkSubmit);
+      this.editor.on('keyup', this.handleKeyUp); 
+      this.setupSubmitKey = true; 
+    }
+  }
+  componentWillUnmount() {
+    if(this.setupSubmitKey) {
+      this.editor.off('keydown', this.checkSubmit); 
+      this.editor.off('keyup', this.handleKeyUp); 
+      this.setupSubmitKey = false; 
+    }
+  }
+  componentDidUpdate() {
+    if(!this.editor || !this.props.value) return; 
+    if(this.editor.getValue() !== this.props.value) {
+      this.editor.setValue(this.props.value);
+    }
+  }
+  render() {
+    const { value, className, onChange } = this.props; 
+    return (
+      <div {...{className}}>
+        <textarea {...{value, onChange}} ref={el => this.textarea = el} /> 
+      </div>
+    );
+  }
+}