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* Copyright 2020 Adobe. All rights reserved.\n * This file is licensed to you under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License. You may obtain a copy\n * of the License at http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS\n * OF ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n */\n\nimport {\n Collection,\n DisabledBehavior,\n FocusStrategy,\n Selection as ISelection,\n Key,\n LayoutDelegate,\n LongPressEvent,\n Node,\n PressEvent,\n SelectionBehavior,\n SelectionMode\n} from '@react-types/shared';\nimport {compareNodeOrder, getChildNodes, getFirstItem} from '../collections/getChildNodes';\nimport {MultipleSelectionManager, MultipleSelectionState} from './types';\nimport {Selection} from './Selection';\n\ninterface SelectionManagerOptions {\n allowsCellSelection?: boolean;\n layoutDelegate?: LayoutDelegate;\n fullCollection?: Collection<Node<unknown>>;\n}\n\n/**\n * An interface for reading and updating multiple selection state.\n */\nexport class SelectionManager implements MultipleSelectionManager {\n collection: Collection<Node<unknown>>;\n private state: MultipleSelectionState;\n private allowsCellSelection: boolean;\n private _isSelectAll: boolean | null;\n private layoutDelegate: LayoutDelegate | null;\n private fullCollection: Collection<Node<unknown>> | null;\n\n constructor(\n collection: Collection<Node<unknown>>,\n state: MultipleSelectionState,\n options?: SelectionManagerOptions\n ) {\n this.collection = collection;\n this.state = state;\n this.allowsCellSelection = options?.allowsCellSelection ?? false;\n this._isSelectAll = null;\n this.layoutDelegate = options?.layoutDelegate || null;\n this.fullCollection = options?.fullCollection || null;\n }\n\n /**\n * The type of selection that is allowed in the collection.\n */\n get selectionMode(): SelectionMode {\n return this.state.selectionMode;\n }\n\n /**\n * Whether the collection allows empty selection.\n */\n get disallowEmptySelection(): boolean {\n return this.state.disallowEmptySelection;\n }\n\n /**\n * The selection behavior for the collection.\n */\n get selectionBehavior(): SelectionBehavior {\n return this.state.selectionBehavior;\n }\n\n /**\n * Sets the selection behavior for the collection.\n */\n setSelectionBehavior(selectionBehavior: SelectionBehavior): void {\n this.state.setSelectionBehavior(selectionBehavior);\n }\n\n /**\n * Whether the collection is currently focused.\n */\n get isFocused(): boolean {\n return this.state.isFocused;\n }\n\n /**\n * Sets whether the collection is focused.\n */\n setFocused(isFocused: boolean): void {\n this.state.setFocused(isFocused);\n }\n\n /**\n * The current focused key in the collection.\n */\n get focusedKey(): Key | null {\n return this.state.focusedKey;\n }\n\n /** Whether the first or last child of the focused key should receive focus. */\n get childFocusStrategy(): FocusStrategy | null {\n return this.state.childFocusStrategy;\n }\n\n /**\n * Sets the focused key.\n */\n setFocusedKey(key: Key | null, childFocusStrategy?: FocusStrategy): void {\n if (key == null || this.collection.getItem(key)) {\n this.state.setFocusedKey(key, childFocusStrategy);\n }\n }\n\n /**\n * The currently selected keys in the collection.\n */\n get selectedKeys(): Set<Key> {\n return this.state.selectedKeys === 'all'\n ? new Set(this.getSelectAllKeys())\n : this.state.selectedKeys;\n }\n\n /**\n * The raw selection value for the collection.\n * Either 'all' for select all, or a set of keys.\n */\n get rawSelection(): ISelection {\n return this.state.selectedKeys;\n }\n\n /**\n * Returns whether a key is selected.\n */\n isSelected(key: Key): boolean {\n if (this.state.selectionMode === 'none') {\n return false;\n }\n\n let mappedKey = this.getKey(key);\n if (mappedKey == null) {\n return false;\n }\n return this.state.selectedKeys === 'all'\n ? this.canSelectItem(mappedKey)\n : this.state.selectedKeys.has(mappedKey);\n }\n\n /**\n * Whether the selection is empty.\n */\n get isEmpty(): boolean {\n return this.state.selectedKeys !== 'all' && this.state.selectedKeys.size === 0;\n }\n\n /**\n * Whether all items in the collection are selected.\n */\n get isSelectAll(): boolean {\n if (this.isEmpty) {\n return false;\n }\n\n if (this.state.selectedKeys === 'all') {\n return true;\n }\n\n if (this._isSelectAll != null) {\n return this._isSelectAll;\n }\n\n let allKeys = this.getSelectAllKeys();\n let selectedKeys = this.state.selectedKeys;\n this._isSelectAll = allKeys.every(k => selectedKeys.has(k));\n return this._isSelectAll;\n }\n\n get firstSelectedKey(): Key | null {\n let first: Node<unknown> | null = null;\n for (let key of this.state.selectedKeys) {\n let item = this.collection.getItem(key);\n if (!first || (item && compareNodeOrder(this.collection, item, first) < 0)) {\n first = item;\n }\n }\n\n return first?.key ?? null;\n }\n\n get lastSelectedKey(): Key | null {\n let last: Node<unknown> | null = null;\n for (let key of this.state.selectedKeys) {\n let item = this.collection.getItem(key);\n if (!last || (item && compareNodeOrder(this.collection, item, last) > 0)) {\n last = item;\n }\n }\n\n return last?.key ?? null;\n }\n\n get disabledKeys(): Set<Key> {\n return this.state.disabledKeys;\n }\n\n get disabledBehavior(): DisabledBehavior {\n return this.state.disabledBehavior;\n }\n\n /**\n * Extends the selection to the given key.\n */\n extendSelection(toKey: Key): void {\n if (this.selectionMode === 'none') {\n return;\n }\n\n if (this.selectionMode === 'single') {\n this.replaceSelection(toKey);\n return;\n }\n\n let mappedToKey = this.getKey(toKey);\n if (mappedToKey == null) {\n return;\n }\n\n let selection: Selection;\n\n // Only select the one key if coming from a select all.\n if (this.state.selectedKeys === 'all') {\n selection = new Selection([mappedToKey], mappedToKey, mappedToKey);\n } else {\n let selectedKeys = this.state.selectedKeys as Selection;\n let anchorKey = selectedKeys.anchorKey ?? mappedToKey;\n selection = new Selection(selectedKeys, anchorKey, mappedToKey);\n for (let key of this.getKeyRange(anchorKey, selectedKeys.currentKey ?? mappedToKey)) {\n selection.delete(key);\n }\n\n for (let key of this.getKeyRange(mappedToKey, anchorKey)) {\n if (this.canSelectItem(key)) {\n selection.add(key);\n }\n }\n }\n\n this.state.setSelectedKeys(selection);\n }\n\n private getKeyRange(from: Key, to: Key) {\n let fromItem = this.collection.getItem(from);\n let toItem = this.collection.getItem(to);\n if (fromItem && toItem) {\n if (compareNodeOrder(this.collection, fromItem, toItem) <= 0) {\n return this.getKeyRangeInternal(from, to);\n }\n\n return this.getKeyRangeInternal(to, from);\n }\n\n return [];\n }\n\n private getKeyRangeInternal(from: Key, to: Key) {\n if (this.layoutDelegate?.getKeyRange) {\n return this.layoutDelegate.getKeyRange(from, to);\n }\n\n let keys: Key[] = [];\n let key: Key | null = from;\n while (key != null) {\n let item = this.collection.getItem(key);\n if (item && (item.type === 'item' || (item.type === 'cell' && this.allowsCellSelection))) {\n keys.push(key);\n }\n\n if (key === to) {\n return keys;\n }\n\n key = this.collection.getKeyAfter(key);\n }\n\n return [];\n }\n\n private getKey(key: Key) {\n let item = this.collection.getItem(key);\n if (!item) {\n // ¯\\_(ツ)_/¯\n return key;\n }\n\n // If cell selection is allowed, just return the key.\n if (item.type === 'cell' && this.allowsCellSelection) {\n return key;\n }\n\n // Find a parent item to select\n while (item && item.type !== 'item' && item.parentKey != null) {\n item = this.collection.getItem(item.parentKey);\n }\n\n if (!item || item.type !== 'item') {\n return null;\n }\n\n return item.key;\n }\n\n /**\n * Toggles whether the given key is selected.\n */\n toggleSelection(key: Key): void {\n if (this.selectionMode === 'none') {\n return;\n }\n\n if (this.selectionMode === 'single' && !this.isSelected(key)) {\n this.replaceSelection(key);\n return;\n }\n\n let mappedKey = this.getKey(key);\n if (mappedKey == null) {\n return;\n }\n\n let keys = new Selection(\n this.state.selectedKeys === 'all' ? this.getSelectAllKeys() : this.state.selectedKeys\n );\n if (keys.has(mappedKey)) {\n keys.delete(mappedKey);\n // TODO: move anchor to last selected key...\n // Does `current` need to move here too?\n } else if (this.canSelectItem(mappedKey)) {\n keys.add(mappedKey);\n keys.anchorKey = mappedKey;\n keys.currentKey = mappedKey;\n }\n\n if (this.disallowEmptySelection && keys.size === 0) {\n return;\n }\n\n this.state.setSelectedKeys(keys);\n }\n\n /**\n * Replaces the selection with only the given key.\n */\n replaceSelection(key: Key): void {\n if (this.selectionMode === 'none') {\n return;\n }\n\n let mappedKey = this.getKey(key);\n if (mappedKey == null) {\n return;\n }\n\n let selection = this.canSelectItem(mappedKey)\n ? new Selection([mappedKey], mappedKey, mappedKey)\n : new Selection();\n\n this.state.setSelectedKeys(selection);\n }\n\n /**\n * Replaces the selection with the given keys.\n */\n setSelectedKeys(keys: Iterable<Key>): void {\n if (this.selectionMode === 'none') {\n return;\n }\n\n let selection = new Selection();\n for (let key of keys) {\n let mappedKey = this.getKey(key);\n if (mappedKey != null) {\n selection.add(mappedKey);\n if (this.selectionMode === 'single') {\n break;\n }\n }\n }\n\n this.state.setSelectedKeys(selection);\n }\n\n private getSelectAllKeys() {\n // Use the full (unfiltered) collection when available so that materializing\n // the 'all' selection includes items that are currently filtered out (e.g. by Autocomplete).\n let collection = this.fullCollection ?? this.collection;\n let keys: Key[] = [];\n let addKeys = (key: Key | null) => {\n while (key != null) {\n if (this.canSelectItemIn(key, collection)) {\n let item = collection.getItem(key);\n if (item?.type === 'item') {\n keys.push(key);\n }\n\n // Add child keys. If cell selection is allowed, then include item children too.\n if (item?.hasChildNodes && (this.allowsCellSelection || item.type !== 'item')) {\n addKeys(getFirstItem(getChildNodes(item, collection))?.key ?? null);\n }\n }\n\n key = collection.getKeyAfter(key);\n }\n };\n\n addKeys(collection.getFirstKey());\n return keys;\n }\n\n /**\n * Selects all items in the collection.\n */\n selectAll(): void {\n if (!this.isSelectAll && this.selectionMode === 'multiple') {\n this.state.setSelectedKeys('all');\n }\n }\n\n /**\n * Removes all keys from the selection.\n */\n clearSelection(): void {\n if (\n !this.disallowEmptySelection &&\n (this.state.selectedKeys === 'all' || this.state.selectedKeys.size > 0)\n ) {\n this.state.setSelectedKeys(new Selection());\n }\n }\n\n /**\n * Toggles between select all and an empty selection.\n */\n toggleSelectAll(): void {\n if (this.isSelectAll) {\n this.clearSelection();\n } else {\n this.selectAll();\n }\n }\n\n select(key: Key, e?: PressEvent | LongPressEvent | PointerEvent): void {\n if (this.selectionMode === 'none') {\n return;\n }\n\n if (this.selectionMode === 'single') {\n if (this.isSelected(key) && !this.disallowEmptySelection) {\n this.toggleSelection(key);\n } else {\n this.replaceSelection(key);\n }\n } else if (\n this.selectionBehavior === 'toggle' ||\n (e && (e.pointerType === 'touch' || e.pointerType === 'virtual'))\n ) {\n // if touch or virtual (VO) then we just want to toggle, otherwise it's impossible to multi select because they don't have modifier keys\n this.toggleSelection(key);\n } else {\n this.replaceSelection(key);\n }\n }\n\n /**\n * Returns whether the current selection is equal to the given selection.\n */\n isSelectionEqual(selection: Set<Key>): boolean {\n if (selection === this.state.selectedKeys) {\n return true;\n }\n\n // Check if the set of keys match.\n let selectedKeys = this.selectedKeys;\n if (selection.size !== selectedKeys.size) {\n return false;\n }\n\n for (let key of selection) {\n if (!selectedKeys.has(key)) {\n return false;\n }\n }\n\n for (let key of selectedKeys) {\n if (!selection.has(key)) {\n return false;\n }\n }\n\n return true;\n }\n\n canSelectItem(key: Key): boolean {\n return this.canSelectItemIn(key, this.collection);\n }\n\n private canSelectItemIn(key: Key, collection: Collection<Node<unknown>>): boolean {\n if (this.state.selectionMode === 'none' || this.state.disabledKeys.has(key)) {\n return false;\n }\n\n let item = collection.getItem(key);\n if (!item || item?.props?.isDisabled || (item.type === 'cell' && !this.allowsCellSelection)) {\n return false;\n }\n\n return true;\n }\n\n isDisabled(key: Key): boolean {\n let item = this.collection.getItem(key);\n return (\n this.state.disabledBehavior === 'all' &&\n (this.state.disabledKeys.has(key) || !!item?.props?.isDisabled) &&\n item?.props?.disabledBehavior !== 'selection'\n );\n }\n\n isLink(key: Key): boolean {\n return !!this.collection.getItem(key)?.props?.href;\n }\n\n getItemProps(key: Key): any {\n return this.collection.getItem(key)?.props;\n }\n\n withCollection(collection: Collection<Node<unknown>>): SelectionManager {\n return new SelectionManager(collection, this.state, {\n allowsCellSelection: this.allowsCellSelection,\n layoutDelegate: this.layoutDelegate || undefined,\n fullCollection: this.fullCollection ?? this.collection\n });\n }\n}\n"],"names":[],"version":3,"file":"SelectionManager.cjs.map"}