{
  "version": 3,
  "sources": ["../../src/navigable-container/container.tsx"],
  "sourcesContent": ["/**\n * External dependencies\n */\n\n/**\n * WordPress dependencies\n */\nimport { forwardRef, useRef, useEffect, useCallback } from '@wordpress/element';\nimport { useMergeRefs } from '@wordpress/compose';\nimport { focus } from '@wordpress/dom';\n\n/**\n * Internal dependencies\n */\nimport { jsx as _jsx } from \"react/jsx-runtime\";\nconst noop = () => {};\nconst MENU_ITEM_ROLES = ['menuitem', 'menuitemradio', 'menuitemcheckbox'];\nfunction cycleValue(value, total, offset) {\n  const nextValue = value + offset;\n  if (nextValue < 0) {\n    return total + nextValue;\n  } else if (nextValue >= total) {\n    return nextValue - total;\n  }\n  return nextValue;\n}\nfunction UnforwardedNavigableContainer({\n  children,\n  stopNavigationEvents,\n  eventToOffset,\n  onNavigate = noop,\n  onKeyDown,\n  cycle = true,\n  onlyBrowserTabstops,\n  ...restProps\n}, ref) {\n  const containerRef = useRef(null);\n  const getFocusableIndex = useCallback((focusables, target) => {\n    return focusables.indexOf(target);\n  }, []);\n  const getFocusableContext = useCallback(target => {\n    if (!containerRef.current) {\n      return null;\n    }\n    const finder = onlyBrowserTabstops ? focus.tabbable : focus.focusable;\n    const focusables = finder.find(containerRef.current);\n    const index = getFocusableIndex(focusables, target);\n    if (index > -1 && target) {\n      return {\n        index,\n        target,\n        focusables\n      };\n    }\n    return null;\n  }, [onlyBrowserTabstops, getFocusableIndex]);\n  useEffect(() => {\n    const container = containerRef.current;\n    if (!container) {\n      return;\n    }\n    function handleKeyDown(event) {\n      if (onKeyDown) {\n        onKeyDown(event);\n      }\n      const offset = eventToOffset(event);\n\n      // eventToOffset returns undefined if the event is not handled by the component.\n      if (offset !== undefined && stopNavigationEvents) {\n        // Prevents arrow key handlers bound to the document directly interfering.\n        event.stopImmediatePropagation();\n\n        // When navigating a collection of items, prevent scroll containers\n        // from scrolling. The preventDefault also prevents Voiceover from\n        // 'handling' the event, as voiceover will try to use arrow keys\n        // for highlighting text.\n        const targetRole = event.target?.getAttribute('role');\n        const targetHasMenuItemRole = !!targetRole && MENU_ITEM_ROLES.includes(targetRole);\n        if (targetHasMenuItemRole) {\n          event.preventDefault();\n        }\n      }\n      if (!offset) {\n        return;\n      }\n      const activeElement = event.target?.ownerDocument?.activeElement;\n      if (!activeElement) {\n        return;\n      }\n      const context = getFocusableContext(activeElement);\n      if (!context) {\n        return;\n      }\n      const {\n        index,\n        focusables\n      } = context;\n      const nextIndex = cycle ? cycleValue(index, focusables.length, offset) : index + offset;\n      if (nextIndex >= 0 && nextIndex < focusables.length) {\n        focusables[nextIndex].focus();\n        onNavigate(nextIndex, focusables[nextIndex]);\n\n        // `preventDefault()` on tab to avoid having the browser move the focus\n        // after this component has already moved it.\n        if (event.code === 'Tab') {\n          event.preventDefault();\n        }\n      }\n    }\n\n    // We use DOM event listeners instead of React event listeners\n    // because we want to catch events from the underlying DOM tree.\n    // The React Tree can be different from the DOM tree when using\n    // portals. Block Toolbars for instance are rendered in a separate\n    // React Trees.\n    container.addEventListener('keydown', handleKeyDown);\n    return () => {\n      container.removeEventListener('keydown', handleKeyDown);\n    };\n  }, [onKeyDown, eventToOffset, stopNavigationEvents, cycle, onNavigate, getFocusableContext]);\n  const mergedRef = useMergeRefs([containerRef, ref]);\n  return /*#__PURE__*/_jsx(\"div\", {\n    ref: mergedRef,\n    ...restProps,\n    children: children\n  });\n}\nconst NavigableContainer = forwardRef(UnforwardedNavigableContainer);\nNavigableContainer.displayName = 'NavigableContainer';\nexport default NavigableContainer;"],
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