// packages/block-editor/src/components/list-view/index.js
import clsx from "clsx";
import {
  useInstanceId,
  useMergeRefs,
  __experimentalUseFixedWindowList as useFixedWindowList
} from "@wordpress/compose";
import {
  __experimentalTreeGrid as TreeGrid,
  VisuallyHidden
} from "@wordpress/components";
import { AsyncModeProvider, useSelect } from "@wordpress/data";
import deprecated from "@wordpress/deprecated";
import {
  useCallback,
  useEffect,
  useMemo,
  useRef,
  useReducer,
  forwardRef,
  useState
} from "@wordpress/element";
import { __ } from "@wordpress/i18n";
import ListViewBranch from "./branch";
import { ListViewContext } from "./context";
import ListViewDropIndicatorPreview from "./drop-indicator";
import useBlockSelection from "./use-block-selection";
import useListViewBlockIndexes from "./use-list-view-block-indexes";
import useListViewClientIds from "./use-list-view-client-ids";
import useListViewCollapseItems from "./use-list-view-collapse-items";
import useListViewDropZone from "./use-list-view-drop-zone";
import useListViewExpandSelectedItem from "./use-list-view-expand-selected-item";
import { store as blockEditorStore } from "../../store";
import { BlockSettingsDropdown } from "../block-settings-menu/block-settings-dropdown";
import { focusListItem } from "./utils";
import useClipboardHandler from "./use-clipboard-handler";
import { jsx, jsxs } from "react/jsx-runtime";
var expanded = (state, action) => {
  if (action.type === "clear") {
    return {};
  }
  if (Array.isArray(action.clientIds)) {
    return {
      ...state,
      ...action.clientIds.reduce(
        (newState, id) => ({
          ...newState,
          [id]: action.type === "expand"
        }),
        {}
      )
    };
  }
  return state;
};
var BLOCK_LIST_ITEM_HEIGHT = 32;
function ListViewComponent({
  id,
  blocks,
  dropZoneElement,
  showBlockMovers = false,
  isExpanded = false,
  showAppender = false,
  blockSettingsMenu: BlockSettingsMenu = BlockSettingsDropdown,
  rootClientId,
  description,
  onSelect,
  additionalBlockContent: AdditionalBlockContent
}, ref) {
  if (blocks) {
    deprecated(
      "`blocks` property in `wp.blockEditor.__experimentalListView`",
      {
        since: "6.3",
        alternative: "`rootClientId` property"
      }
    );
  }
  const instanceId = useInstanceId(ListViewComponent);
  const { clientIdsTree, draggedClientIds, selectedClientIds } = useListViewClientIds({ blocks, rootClientId });
  const blockIndexes = useListViewBlockIndexes(clientIdsTree);
  const { getBlock } = useSelect(blockEditorStore);
  const { visibleBlockCount } = useSelect(
    (select) => {
      const { getGlobalBlockCount, getClientIdsOfDescendants } = select(blockEditorStore);
      const draggedBlockCount = draggedClientIds?.length > 0 ? getClientIdsOfDescendants(draggedClientIds).length + 1 : 0;
      return {
        visibleBlockCount: getGlobalBlockCount() - draggedBlockCount
      };
    },
    [draggedClientIds]
  );
  const { updateBlockSelection } = useBlockSelection();
  const [expandedState, setExpandedState] = useReducer(expanded, {});
  const [insertedBlock, setInsertedBlock] = useState(null);
  const { setSelectedTreeId } = useListViewExpandSelectedItem({
    firstSelectedBlockClientId: selectedClientIds[0],
    setExpandedState
  });
  const selectEditorBlock = useCallback(
    /**
     * @param {MouseEvent | KeyboardEvent | undefined} event
     * @param {string}                                 blockClientId
     * @param {null | undefined | -1 | 1}              focusPosition
     */
    (event, blockClientId, focusPosition) => {
      updateBlockSelection(event, blockClientId, null, focusPosition);
      setSelectedTreeId(blockClientId);
      if (onSelect) {
        onSelect(getBlock(blockClientId));
      }
    },
    [setSelectedTreeId, updateBlockSelection, onSelect, getBlock]
  );
  const { ref: dropZoneRef, target: blockDropTarget } = useListViewDropZone({
    dropZoneElement,
    expandedState,
    setExpandedState
  });
  const elementRef = useRef();
  const clipBoardRef = useClipboardHandler({
    selectBlock: selectEditorBlock
  });
  const treeGridRef = useMergeRefs([
    clipBoardRef,
    elementRef,
    dropZoneRef,
    ref
  ]);
  useEffect(() => {
    if (selectedClientIds?.length) {
      focusListItem(selectedClientIds[0], elementRef?.current);
    }
  }, []);
  const expand = useCallback(
    (clientId) => {
      if (!clientId) {
        return;
      }
      const clientIds = Array.isArray(clientId) ? clientId : [clientId];
      setExpandedState({ type: "expand", clientIds });
    },
    [setExpandedState]
  );
  const collapse = useCallback(
    (clientId) => {
      if (!clientId) {
        return;
      }
      setExpandedState({ type: "collapse", clientIds: [clientId] });
    },
    [setExpandedState]
  );
  const collapseAll = useCallback(() => {
    setExpandedState({ type: "clear" });
  }, [setExpandedState]);
  const expandRow = useCallback(
    (row) => {
      expand(row?.dataset?.block);
    },
    [expand]
  );
  const collapseRow = useCallback(
    (row) => {
      collapse(row?.dataset?.block);
    },
    [collapse]
  );
  const focusRow = useCallback(
    (event, startRow, endRow) => {
      if (event.shiftKey) {
        updateBlockSelection(
          event,
          startRow?.dataset?.block,
          endRow?.dataset?.block
        );
      }
    },
    [updateBlockSelection]
  );
  useListViewCollapseItems({
    collapseAll,
    expand
  });
  const firstDraggedBlockClientId = draggedClientIds?.[0];
  const { blockDropTargetIndex, blockDropPosition, firstDraggedBlockIndex } = useMemo(() => {
    let _blockDropTargetIndex, _firstDraggedBlockIndex;
    if (blockDropTarget?.clientId) {
      const foundBlockIndex = blockIndexes[blockDropTarget.clientId];
      _blockDropTargetIndex = foundBlockIndex === void 0 || blockDropTarget?.dropPosition === "top" ? foundBlockIndex : foundBlockIndex + 1;
    } else if (blockDropTarget === null) {
      _blockDropTargetIndex = null;
    }
    if (firstDraggedBlockClientId) {
      const foundBlockIndex = blockIndexes[firstDraggedBlockClientId];
      _firstDraggedBlockIndex = foundBlockIndex === void 0 || blockDropTarget?.dropPosition === "top" ? foundBlockIndex : foundBlockIndex + 1;
    }
    return {
      blockDropTargetIndex: _blockDropTargetIndex,
      blockDropPosition: blockDropTarget?.dropPosition,
      firstDraggedBlockIndex: _firstDraggedBlockIndex
    };
  }, [blockDropTarget, blockIndexes, firstDraggedBlockClientId]);
  const contextValue = useMemo(
    () => ({
      blockDropPosition,
      blockDropTargetIndex,
      blockIndexes,
      draggedClientIds,
      expandedState,
      expand,
      firstDraggedBlockIndex,
      collapse,
      collapseAll,
      BlockSettingsMenu,
      listViewInstanceId: instanceId,
      AdditionalBlockContent,
      insertedBlock,
      setInsertedBlock,
      treeGridElementRef: elementRef,
      rootClientId
    }),
    [
      blockDropPosition,
      blockDropTargetIndex,
      blockIndexes,
      draggedClientIds,
      expandedState,
      expand,
      firstDraggedBlockIndex,
      collapse,
      collapseAll,
      BlockSettingsMenu,
      instanceId,
      AdditionalBlockContent,
      insertedBlock,
      setInsertedBlock,
      rootClientId
    ]
  );
  const [fixedListWindow] = useFixedWindowList(
    elementRef,
    BLOCK_LIST_ITEM_HEIGHT,
    visibleBlockCount,
    {
      // Ensure that the windowing logic is recalculated when the expanded state changes.
      // This is necessary because expanding a collapsed block in a short list view can
      // switch the list view to a tall list view with a scrollbar, and vice versa.
      // When this happens, the windowing logic needs to be recalculated to ensure that
      // the correct number of blocks are rendered, by rechecking for a scroll container.
      expandedState,
      useWindowing: true,
      windowOverscan: 40
    }
  );
  if (!clientIdsTree.length && !showAppender) {
    return null;
  }
  const describedById = description && `block-editor-list-view-description-${instanceId}`;
  return /* @__PURE__ */ jsxs(AsyncModeProvider, { value: true, children: [
    /* @__PURE__ */ jsx(
      ListViewDropIndicatorPreview,
      {
        draggedBlockClientId: firstDraggedBlockClientId,
        listViewRef: elementRef,
        blockDropTarget
      }
    ),
    description && /* @__PURE__ */ jsx(VisuallyHidden, { id: describedById, children: description }),
    /* @__PURE__ */ jsx(
      TreeGrid,
      {
        id,
        className: clsx("block-editor-list-view-tree", {
          "is-dragging": draggedClientIds?.length > 0 && blockDropTargetIndex !== void 0
        }),
        "aria-label": __("Block navigation structure"),
        ref: treeGridRef,
        onCollapseRow: collapseRow,
        onExpandRow: expandRow,
        onFocusRow: focusRow,
        applicationAriaLabel: __("Block navigation structure"),
        "aria-describedby": describedById,
        style: {
          "--wp-admin--list-view-dragged-items-height": draggedClientIds?.length ? `${BLOCK_LIST_ITEM_HEIGHT * (draggedClientIds.length - 1)}px` : null
        },
        children: /* @__PURE__ */ jsx(ListViewContext.Provider, { value: contextValue, children: /* @__PURE__ */ jsx(
          ListViewBranch,
          {
            blocks: clientIdsTree,
            parentId: rootClientId,
            selectBlock: selectEditorBlock,
            showBlockMovers,
            fixedListWindow,
            selectedClientIds,
            isExpanded,
            showAppender
          }
        ) })
      }
    )
  ] });
}
var PrivateListView = forwardRef(ListViewComponent);
var list_view_default = forwardRef((props, ref) => {
  return /* @__PURE__ */ jsx(
    PrivateListView,
    {
      ref,
      ...props,
      showAppender: false,
      rootClientId: null,
      onSelect: null,
      additionalBlockContent: null,
      blockSettingsMenu: void 0
    }
  );
});
export {
  BLOCK_LIST_ITEM_HEIGHT,
  PrivateListView,
  list_view_default as default
};
//# sourceMappingURL=index.js.map
