Better markdown editor and SegmentedControl

src-web/components/core/SegmentedControl.tsx

@@ -0,0 +1,56 @@
+import { useRef } from 'react';
+import { useStateWithDeps } from '../../hooks/useStateWithDeps';
+import type { IconProps } from './Icon';
+import type { IconButtonProps } from './IconButton';
+import { IconButton } from './IconButton';
+import { HStack } from './Stacks';
+
+interface Props<T extends string> {
+  options: { value: T; label: string; icon: IconProps['icon']; event?: IconButtonProps['event'] }[];
+  onChange: (value: T) => void;
+  value: T;
+  name: string;
+}
+
+export function SegmentedControl<T extends string>({ value, onChange, options, name }: Props<T>) {
+  const [selectedValue, setSelectedValue] = useStateWithDeps<T>(value, [value]);
+  const containerRef = useRef<HTMLDivElement>(null);
+  return (
+    <HStack
+      ref={containerRef}
+      space={1}
+      role="group"
+      dir="ltr"
+      className="mb-auto bg-surface opacity-0 group-focus-within/markdown:opacity-100 group-hover/markdown:opacity-100 transition-opacity transform-gpu"
+      onKeyDown={(e) => {
+        const selectedIndex = options.findIndex((o) => o.value === selectedValue);
+        if (e.key === 'ArrowRight') {
+          const newIndex = Math.abs((selectedIndex + 1) % options.length);
+          setSelectedValue(options[newIndex]!.value);
+          const child = containerRef.current?.children[newIndex] as HTMLButtonElement;
+          child.focus();
+        } else if (e.key === 'ArrowLeft') {
+          const newIndex = Math.abs((selectedIndex - 1) % options.length);
+          setSelectedValue(options[newIndex]!.value);
+          const child = containerRef.current?.children[newIndex] as HTMLButtonElement;
+          child.focus();
+        }
+      }}
+    >
+      {options.map((o, i) => (
+        <IconButton
+          size="xs"
+          variant={value === o.value ? 'solid' : 'border'}
+          color={value === o.value ? 'secondary' : 'default'}
+          role="radio"
+          event={{ id: name, value: String(o.value) }}
+          tabIndex={selectedValue === o.value ? 0 : -1}
+          key={i}
+          title={o.label}
+          icon={o.icon}
+          onClick={() => onChange(o.value)}
+        />
+      ))}
+    </HStack>
+  );
+}