New file/folder menu on toolbar (#2452)

frontend/src/components/dialog/rename-dialog.js

@@ -0,0 +1,78 @@
+import React from 'react';
+import { gettext } from '../../utils/constants';
+import { Button, Modal, ModalHeader, Input, ModalBody, ModalFooter } from 'reactstrap';
+
+class Rename extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      newName: '',
+    };
+    this.newInput = React.createRef();
+  }
+  
+  handleChange = (e) => {
+    this.setState({
+      newName: e.target.value, 
+    }); 
+  }
+
+  handleSubmit = () => {
+    this.props.onRename(this.state.newName);
+  }
+
+  handleKeyPress = (e) => {
+    if (e.key === 'Enter') {
+      this.handleSubmit();
+    } 
+  }
+
+  toggle = () => {
+    this.props.toggleCancel();
+  }
+
+  componentWillMount() {
+    this.setState({
+      newName: this.props.currentNode.name
+    });
+  }
+
+  componentDidMount() {
+    this.changeState(this.props.currentNode);
+    this.newInput.focus();
+    let type = this.props.currentNode.type;
+    if (type === 'file') {
+      var endIndex = this.props.currentNode.name.lastIndexOf('.md');
+      this.newInput.setSelectionRange(0, endIndex, 'forward');
+    } else {
+      this.newInput.setSelectionRange(0, -1);
+    }
+  }
+
+  componentWillReceiveProps(nextProps) {
+    this.changeState(nextProps.currentNode);
+  }
+
+  changeState(currentNode) {
+    this.setState({newName: currentNode.name});
+  }
+
+  render() {
+    let type = this.props.currentNode.type;
+    return (
+      <Modal isOpen={true} toggle={this.toggle}>
+        <ModalHeader toggle={this.toggle}>{type === 'file' ? gettext('Rename File') : gettext('Rename Folder') }</ModalHeader>
+        <ModalBody>
+          <p>{type === 'file' ? gettext('Enter the new file name:'): gettext('Enter the new folder name:')}</p>
+          <Input onKeyPress={this.handleKeyPress} innerRef={input => {this.newInput = input;}} placeholder="newName" value={this.state.newName} onChange={this.handleChange} />
+        </ModalBody>
+        <ModalFooter>
+          <Button color="primary" onClick={this.handleSubmit}>{gettext('Submit')}</Button>
+          <Button color="secondary" onClick={this.toggle}>{gettext('Cancel')}</Button>
+        </ModalFooter>
+      </Modal>
+    );
+  }
+}
+
+export default Rename;