1 files changed, 146 insertions, 0 deletions
diff --git a/extension/react-app/src/components/ComboBox.tsx b/extension/react-app/src/components/ComboBox.tsx
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index 00000000..1b7c60e6
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+++ b/extension/react-app/src/components/ComboBox.tsx
@@ -0,0 +1,146 @@
+import React, { useCallback } from "react";
+import { useCombobox } from "downshift";
+import styled from "styled-components";
+import {
+  buttonColor,
+  defaultBorderRadius,
+  secondaryDark,
+  vscBackground,
+} from ".";
+
+const mainInputFontSize = 16;
+const MainTextInput = styled.input`
+  padding: 8px;
+  font-size: ${mainInputFontSize}px;
+  border-radius: ${defaultBorderRadius};
+  border: 1px solid #ccc;
+  margin: 8px auto;
+  width: 100%;
+  background-color: ${vscBackground};
+  color: white;
+  outline: 1px solid orange;
+`;
+
+const UlMaxHeight = 200;
+const Ul = styled.ul<{
+  hidden: boolean;
+  showAbove: boolean;
+  ulHeightPixels: number;
+}>`
+  ${(props) =>
+    props.showAbove
+      ? `transform: translateY(-${props.ulHeightPixels + 8}px);`
+      : `transform: translateY(${2 * mainInputFontSize}px);`}
+  position: absolute;
+  background: ${vscBackground};
+  background-color: ${secondaryDark};
+  color: white;
+  font-family: "Fira Code", monospace;
+  max-height: ${UlMaxHeight}px;
+  overflow: scroll;
+  padding: 0;
+  ${({ hidden }) => hidden && "display: none;"}
+  border-radius: ${defaultBorderRadius};
+  overflow: hidden;
+  border: 0.5px solid gray;
+`;
+
+const Li = styled.li<{
+  highlighted: boolean;
+  selected: boolean;
+  isLastItem: boolean;
+}>`
+  ${({ highlighted }) => highlighted && "background: #aa0000;"}
+  ${({ selected }) => selected && "font-weight: bold;"}
+    padding: 0.5rem 0.75rem;
+  display: flex;
+  flex-direction: column;
+  ${({ isLastItem }) => isLastItem && "border-bottom: 1px solid gray;"}
+  border-top: 1px solid gray;
+  cursor: pointer;
+`;
+
+interface ComboBoxProps {
+  items: { name: string; description: string }[];
+  onInputValueChange: (inputValue: string) => void;
+  disabled?: boolean;
+  onEnter?: (e: React.KeyboardEvent<HTMLInputElement>) => void;
+}
+
+const ComboBox = React.forwardRef((props: ComboBoxProps, ref) => {
+  const [items, setItems] = React.useState(props.items);
+  const {
+    isOpen,
+    getToggleButtonProps,
+    getLabelProps,
+    getMenuProps,
+    getInputProps,
+    highlightedIndex,
+    getItemProps,
+    selectedItem,
+    setInputValue,
+  } = useCombobox({
+    onInputValueChange({ inputValue }) {
+      if (!inputValue) return;
+      props.onInputValueChange(inputValue);
+      setItems(
+        props.items.filter((item) =>
+          item.name.toLowerCase().startsWith(inputValue.toLowerCase())
+        )
+      );
+    },
+    items,
+    itemToString(item) {
+      return item ? item.name : "";
+    },
+  });
+
+  const divRef = React.useRef<HTMLDivElement>(null);
+  const ulRef = React.useRef<HTMLUListElement>(null);
+  const showAbove = () => {
+    return (divRef.current?.getBoundingClientRect().top || 0) > UlMaxHeight;
+  };
+
+  return (
+    <div className="flex px-2" ref={divRef} hidden={!isOpen}>
+      <MainTextInput
+        disabled={props.disabled}
+        placeholder="Ask anything:"
+        {...getInputProps({
+          onKeyDown: (event) => {
+            if (event.key === "Enter" && (!isOpen || items.length === 0)) {
+              // Prevent Downshift's default 'Enter' behavior.
+              (event.nativeEvent as any).preventDownshiftDefault = true;
+              if (props.onEnter) props.onEnter(event);
+              setInputValue("");
+            }
+          },
+          ref: ref as any,
+        })}
+      />
+      <Ul
+        {...getMenuProps({
+          ref: ulRef,
+        })}
+        showAbove={showAbove()}
+        ulHeightPixels={ulRef.current?.getBoundingClientRect().height || 0}
+      >
+        {isOpen &&
+          items.map((item, index) => (
+            <Li
+              key={`${item.name}${index}`}
+              {...getItemProps({ item, index })}
+              highlighted={highlightedIndex === index}
+              selected={selectedItem === item}
+            >
+              <span>
+                {item.name}: {item.description}
+              </span>
+            </Li>
+          ))}
+      </Ul>
+    </div>
+  );
+});
+
+export default ComboBox;