New file/folder menu on toolbar (#2452)

frontend/src/components/dialog/create-file-dialog.js

@@ -0,0 +1,73 @@
+import React from 'react';
+import { Button, Modal, ModalHeader, Input, ModalBody, ModalFooter, Form, FormGroup, Label, Col, FormText } from 'reactstrap';
+import { gettext } from '../../utils/constants';
+
+class CreateFile extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      parentPath: '',
+      childName: props.fileType,
+    };
+    this.newInput = React.createRef()
+  }
+
+  handleChange = (e) => {
+    this.setState({
+      childName: e.target.value, 
+    }) 
+  }
+
+  handleSubmit = () => {
+    let path = this.state.parentPath + this.state.childName
+    this.props.onAddFile(path);
+  } 
+
+  handleKeyPress = (e) => {
+    if (e.key === 'Enter') {
+      this.handleSubmit();
+    }
+  }
+
+  toggle = () => {
+    this.props.addFileCancel();
+  }
+
+  componentDidMount() {
+    if (this.props.parentPath === "/") {
+      this.setState({parentPath: this.props.parentPath});
+    } else {
+      this.setState({parentPath: this.props.parentPath + "/"});
+    }
+    this.newInput.focus();
+    this.newInput.setSelectionRange(0,0);
+  }
+
+  render() {
+    return (
+      <Modal isOpen={true} toggle={this.toggle}>
+        <ModalHeader toggle={this.toggle}>{gettext("New File")}</ModalHeader>
+        <ModalBody>
+          <Form>
+            <FormGroup row>
+              <Label sm={3}>Parent path: </Label>
+              <Col sm={9} className="parent-path"><FormText>{this.state.parentPath}</FormText></Col>
+            </FormGroup>
+            <FormGroup row>
+              <Label for="fileName" sm={3}>{gettext("Name")}: </Label>
+              <Col sm={9}>
+                <Input onKeyPress={this.handleKeyPress} innerRef={input => {this.newInput = input}} id="fileName" placeholder={gettext("newName")} value={this.state.childName} onChange={this.handleChange}/>
+              </Col>
+            </FormGroup>
+          </Form>
+        </ModalBody>
+        <ModalFooter>
+          <Button color="primary" onClick={this.handleSubmit}>{gettext("Submit")}</Button>
+          <Button color="secondary" onClick={this.toggle}>{gettext("Cancel")}</Button>
+        </ModalFooter>
+      </Modal>
+    )
+  }
+}
+
+export default CreateFile;