@angular/cdk/fesm2022/_recycle-view-repeater-strategy-chunk.mjs.map

Angular Material Component Development Kit

{"version":3,"file":"_recycle-view-repeater-strategy-chunk.mjs","sources":["../../../../../darwin_arm64-fastbuild-ST-fdfa778d11ba/bin/src/cdk/collections/array-data-source.ts","../../../../../darwin_arm64-fastbuild-ST-fdfa778d11ba/bin/src/cdk/collections/view-repeater.ts","../../../../../darwin_arm64-fastbuild-ST-fdfa778d11ba/bin/src/cdk/collections/recycle-view-repeater-strategy.ts"],"sourcesContent":["/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.dev/license\n */\n\nimport {Observable, isObservable, of as observableOf} from 'rxjs';\nimport {DataSource} from './data-source';\n\n/** DataSource wrapper for a native array. */\nexport class ArrayDataSource<T> extends DataSource<T> {\n  constructor(private _data: readonly T[] | Observable<readonly T[]>) {\n    super();\n  }\n\n  connect(): Observable<readonly T[]> {\n    return isObservable(this._data) ? this._data : observableOf(this._data);\n  }\n\n  disconnect() {}\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.dev/license\n */\n\nimport {\n  InjectionToken,\n  IterableChangeRecord,\n  IterableChanges,\n  TemplateRef,\n  ViewContainerRef,\n} from '@angular/core';\n\n/**\n * The context for an embedded view in the repeater's view container.\n *\n * @template T The type for the embedded view's $implicit property.\n */\nexport interface _ViewRepeaterItemContext<T> {\n  $implicit?: T;\n}\n\n/**\n * The arguments needed to construct an embedded view for an item in a view\n * container.\n *\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeaterItemInsertArgs<C> {\n  templateRef: TemplateRef<C>;\n  context?: C;\n  index?: number;\n}\n\n/**\n * A factory that derives the embedded view context for an item in a view\n * container.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport type _ViewRepeaterItemContextFactory<T, R, C extends _ViewRepeaterItemContext<T>> = (\n  record: IterableChangeRecord<R>,\n  adjustedPreviousIndex: number | null,\n  currentIndex: number | null,\n) => _ViewRepeaterItemInsertArgs<C>;\n\n/**\n * Extracts the value of an item from an `IterableChangeRecord`.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n */\nexport type _ViewRepeaterItemValueResolver<T, R> = (record: IterableChangeRecord<R>) => T;\n\n/** Indicates how a view was changed by a `_ViewRepeater`. */\nexport enum _ViewRepeaterOperation {\n  /** The content of an existing view was replaced with another item. */\n  REPLACED,\n  /** A new view was created with `createEmbeddedView`. */\n  INSERTED,\n  /** The position of a view changed, but the content remains the same. */\n  MOVED,\n  /** A view was detached from the view container. */\n  REMOVED,\n}\n\n/**\n * Meta data describing the state of a view after it was updated by a `_ViewRepeater`.\n *\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeaterItemChange<R, C> {\n  /** The view's context after it was changed. */\n  context?: C;\n  /** Indicates how the view was changed. */\n  operation: _ViewRepeaterOperation;\n  /** The view's corresponding change record. */\n  record: IterableChangeRecord<R>;\n}\n\n/**\n * Type for a callback to be executed after a view has changed.\n *\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport type _ViewRepeaterItemChanged<R, C> = (change: _ViewRepeaterItemChange<R, C>) => void;\n\n/**\n * Describes a strategy for rendering items in a `ViewContainerRef`.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport interface _ViewRepeater<T, R, C extends _ViewRepeaterItemContext<T>> {\n  applyChanges(\n    changes: IterableChanges<R>,\n    viewContainerRef: ViewContainerRef,\n    itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>,\n    itemValueResolver: _ViewRepeaterItemValueResolver<T, R>,\n    itemViewChanged?: _ViewRepeaterItemChanged<R, C>,\n  ): void;\n\n  detach(): void;\n}\n\n/**\n * Injection token for `_ViewRepeater`. This token is for use by Angular Material only.\n * @docs-private\n */\nexport const _VIEW_REPEATER_STRATEGY = new InjectionToken<\n  _ViewRepeater<unknown, unknown, _ViewRepeaterItemContext<unknown>>\n>('_ViewRepeater');\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.dev/license\n */\n\nimport {\n  EmbeddedViewRef,\n  IterableChangeRecord,\n  IterableChanges,\n  ViewContainerRef,\n} from '@angular/core';\nimport {\n  _ViewRepeater,\n  _ViewRepeaterItemChanged,\n  _ViewRepeaterItemContext,\n  _ViewRepeaterItemContextFactory,\n  _ViewRepeaterItemInsertArgs,\n  _ViewRepeaterItemValueResolver,\n  _ViewRepeaterOperation,\n} from './view-repeater';\n\n/**\n * A repeater that caches views when they are removed from a\n * `ViewContainerRef`. When new items are inserted into the container,\n * the repeater will reuse one of the cached views instead of creating a new\n * embedded view. Recycling cached views reduces the quantity of expensive DOM\n * inserts.\n *\n * @template T The type for the embedded view's $implicit property.\n * @template R The type for the item in each IterableDiffer change record.\n * @template C The type for the context passed to each embedded view.\n */\nexport class _RecycleViewRepeaterStrategy<\n  T,\n  R,\n  C extends _ViewRepeaterItemContext<T>,\n> implements _ViewRepeater<T, R, C> {\n  /**\n   * The size of the cache used to store unused views.\n   * Setting the cache size to `0` will disable caching. Defaults to 20 views.\n   */\n  viewCacheSize: number = 20;\n\n  /**\n   * View cache that stores embedded view instances that have been previously stamped out,\n   * but don't are not currently rendered. The view repeater will reuse these views rather than\n   * creating brand new ones.\n   *\n   * TODO(michaeljamesparsons) Investigate whether using a linked list would improve performance.\n   */\n  private _viewCache: EmbeddedViewRef<C>[] = [];\n\n  /** Apply changes to the DOM. */\n  applyChanges(\n    changes: IterableChanges<R>,\n    viewContainerRef: ViewContainerRef,\n    itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>,\n    itemValueResolver: _ViewRepeaterItemValueResolver<T, R>,\n    itemViewChanged?: _ViewRepeaterItemChanged<R, C>,\n  ) {\n    // Rearrange the views to put them in the right location.\n    changes.forEachOperation(\n      (\n        record: IterableChangeRecord<R>,\n        adjustedPreviousIndex: number | null,\n        currentIndex: number | null,\n      ) => {\n        let view: EmbeddedViewRef<C> | undefined;\n        let operation: _ViewRepeaterOperation;\n        if (record.previousIndex == null) {\n          // Item added.\n          const viewArgsFactory = () =>\n            itemContextFactory(record, adjustedPreviousIndex, currentIndex);\n          view = this._insertView(\n            viewArgsFactory,\n            currentIndex!,\n            viewContainerRef,\n            itemValueResolver(record),\n          );\n          operation = view ? _ViewRepeaterOperation.INSERTED : _ViewRepeaterOperation.REPLACED;\n        } else if (currentIndex == null) {\n          // Item removed.\n          this._detachAndCacheView(adjustedPreviousIndex!, viewContainerRef);\n          operation = _ViewRepeaterOperation.REMOVED;\n        } else {\n          // Item moved.\n          view = this._moveView(\n            adjustedPreviousIndex!,\n            currentIndex!,\n            viewContainerRef,\n            itemValueResolver(record),\n          );\n          operation = _ViewRepeaterOperation.MOVED;\n        }\n\n        if (itemViewChanged) {\n          itemViewChanged({\n            context: view?.context,\n            operation,\n            record,\n          });\n        }\n      },\n    );\n  }\n\n  detach() {\n    for (const view of this._viewCache) {\n      view.destroy();\n    }\n    this._viewCache = [];\n  }\n\n  /**\n   * Inserts a view for a new item, either from the cache or by creating a new\n   * one. Returns `undefined` if the item was inserted into a cached view.\n   */\n  private _insertView(\n    viewArgsFactory: () => _ViewRepeaterItemInsertArgs<C>,\n    currentIndex: number,\n    viewContainerRef: ViewContainerRef,\n    value: T,\n  ): EmbeddedViewRef<C> | undefined {\n    const cachedView = this._insertViewFromCache(currentIndex!, viewContainerRef);\n    if (cachedView) {\n      cachedView.context.$implicit = value;\n      return undefined;\n    }\n\n    const viewArgs = viewArgsFactory();\n    return viewContainerRef.createEmbeddedView(\n      viewArgs.templateRef,\n      viewArgs.context,\n      viewArgs.index,\n    );\n  }\n\n  /** Detaches the view at the given index and inserts into the view cache. */\n  private _detachAndCacheView(index: number, viewContainerRef: ViewContainerRef) {\n    const detachedView = viewContainerRef.detach(index) as EmbeddedViewRef<C>;\n    this._maybeCacheView(detachedView, viewContainerRef);\n  }\n\n  /** Moves view at the previous index to the current index. */\n  private _moveView(\n    adjustedPreviousIndex: number,\n    currentIndex: number,\n    viewContainerRef: ViewContainerRef,\n    value: T,\n  ): EmbeddedViewRef<C> {\n    const view = viewContainerRef.get(adjustedPreviousIndex!) as EmbeddedViewRef<C>;\n    viewContainerRef.move(view, currentIndex);\n    view.context.$implicit = value;\n    return view;\n  }\n\n  /**\n   * Cache the given detached view. 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It's unlikely this will occur, but just in case,\n      // destroy the view on its own, otherwise destroy it through the\n      // container to ensure that all the references are removed.\n      if (index === -1) {\n        view.destroy();\n      } else {\n        viewContainerRef.remove(index);\n      }\n    }\n  }\n\n  /** Inserts a recycled view from the cache at the given index. */\n  private _insertViewFromCache(\n    index: number,\n    viewContainerRef: ViewContainerRef,\n  ): EmbeddedViewRef<C> | null {\n    const cachedView = this._viewCache.pop();\n    if (cachedView) {\n      viewContainerRef.insert(cachedView, index);\n    }\n    return cachedView || null;\n  }\n}\n"],"names":["ArrayDataSource","DataSource","_data","constructor","connect","isObservable","observableOf","disconnect","_ViewRepeaterOperation","_VIEW_REPEATER_STRATEGY","InjectionToken","_RecycleViewRepeaterStrategy","viewCacheSize","_viewCache","applyChanges","changes","viewContainerRef","itemContextFactory","itemValueResolver","itemViewChanged","forEachOperation","record","adjustedPreviousIndex","currentIndex","view","operation","previousIndex","viewArgsFactory","_insertView","INSERTED","REPLACED","_detachAndCacheView","REMOVED","_moveView","MOVED","context","detach","destroy","value","cachedView","_insertViewFromCache","$implicit","undefined","viewArgs","createEmbeddedView","templateRef","index","detachedView","_maybeCacheView","get","move","length","push","indexOf","remove","pop","insert"],"mappings":";;;;AAYM,MAAOA,eAAmB,SAAQC,UAAa,CAAA;EAC/BC,KAAA;EAApBC,WAAAA,CAAoBD,KAA8C,EAAA;AAChE,IAAA,KAAK,EAAE;IADW,IAAK,CAAAA,KAAA,GAALA,KAAK;AAEzB;AAEAE,EAAAA,OAAOA,GAAA;AACL,IAAA,OAAOC,YAAY,CAAC,IAAI,CAACH,KAAK,CAAC,GAAG,IAAI,CAACA,KAAK,GAAGI,EAAY,CAAC,IAAI,CAACJ,KAAK,CAAC;AACzE;EAEAK,UAAUA;AACX;;ICsCWC;AAAZ,CAAA,UAAYA,sBAAsB,EAAA;EAEhCA,sBAAA,CAAAA,sBAAA,CAAA,UAAA,CAAA,GAAA,CAAA,CAAA,GAAA,UAAQ;EAERA,sBAAA,CAAAA,sBAAA,CAAA,UAAA,CAAA,GAAA,CAAA,CAAA,GAAA,UAAQ;EAERA,sBAAA,CAAAA,sBAAA,CAAA,OAAA,CAAA,GAAA,CAAA,CAAA,GAAA,OAAK;EAELA,sBAAA,CAAAA,sBAAA,CAAA,SAAA,CAAA,GAAA,CAAA,CAAA,GAAA,SAAO;AACT,CAAC,EATWA,sBAAsB,KAAtBA,sBAAsB,GASjC,EAAA,CAAA,CAAA;MAgDYC,uBAAuB,GAAG,IAAIC,cAAc,CAEvD,eAAe;;MCpFJC,4BAA4B,CAAA;AASvCC,EAAAA,aAAa,GAAW,EAAE;AASlBC,EAAAA,UAAU,GAAyB,EAAE;EAG7CC,YAAYA,CACVC,OAA2B,EAC3BC,gBAAkC,EAClCC,kBAA4D,EAC5DC,iBAAuD,EACvDC,eAAgD,EAAA;IAGhDJ,OAAO,CAACK,gBAAgB,CACtB,CACEC,MAA+B,EAC/BC,qBAAoC,EACpCC,YAA2B,KACzB;AACF,MAAA,IAAIC,IAAoC;AACxC,MAAA,IAAIC,SAAiC;AACrC,MAAA,IAAIJ,MAAM,CAACK,aAAa,IAAI,IAAI,EAAE;QAEhC,MAAMC,eAAe,GAAGA,MACtBV,kBAAkB,CAACI,MAAM,EAAEC,qBAAqB,EAAEC,YAAY,CAAC;AACjEC,QAAAA,IAAI,GAAG,IAAI,CAACI,WAAW,CACrBD,eAAe,EACfJ,YAAa,EACbP,gBAAgB,EAChBE,iBAAiB,CAACG,MAAM,CAAC,CAC1B;QACDI,SAAS,GAAGD,IAAI,GAAGhB,sBAAsB,CAACqB,QAAQ,GAAGrB,sBAAsB,CAACsB,QAAQ;AACtF,OAAA,MAAO,IAAIP,YAAY,IAAI,IAAI,EAAE;AAE/B,QAAA,IAAI,CAACQ,mBAAmB,CAACT,qBAAsB,EAAEN,gBAAgB,CAAC;QAClES,SAAS,GAAGjB,sBAAsB,CAACwB,OAAO;AAC5C,OAAA,MAAO;AAELR,QAAAA,IAAI,GAAG,IAAI,CAACS,SAAS,CACnBX,qBAAsB,EACtBC,YAAa,EACbP,gBAAgB,EAChBE,iBAAiB,CAACG,MAAM,CAAC,CAC1B;QACDI,SAAS,GAAGjB,sBAAsB,CAAC0B,KAAK;AAC1C;AAEA,MAAA,IAAIf,eAAe,EAAE;AACnBA,QAAAA,eAAe,CAAC;UACdgB,OAAO,EAAEX,IAAI,EAAEW,OAAO;UACtBV,SAAS;AACTJ,UAAAA;AACD,SAAA,CAAC;AACJ;AACF,KAAC,CACF;AACH;AAEAe,EAAAA,MAAMA,GAAA;AACJ,IAAA,KAAK,MAAMZ,IAAI,IAAI,IAAI,CAACX,UAAU,EAAE;MAClCW,IAAI,CAACa,OAAO,EAAE;AAChB;IACA,IAAI,CAACxB,UAAU,GAAG,EAAE;AACtB;EAMQe,WAAWA,CACjBD,eAAqD,EACrDJ,YAAoB,EACpBP,gBAAkC,EAClCsB,KAAQ,EAAA;IAER,MAAMC,UAAU,GAAG,IAAI,CAACC,oBAAoB,CAACjB,YAAa,EAAEP,gBAAgB,CAAC;AAC7E,IAAA,IAAIuB,UAAU,EAAE;AACdA,MAAAA,UAAU,CAACJ,OAAO,CAACM,SAAS,GAAGH,KAAK;AACpC,MAAA,OAAOI,SAAS;AAClB;AAEA,IAAA,MAAMC,QAAQ,GAAGhB,eAAe,EAAE;AAClC,IAAA,OAAOX,gBAAgB,CAAC4B,kBAAkB,CACxCD,QAAQ,CAACE,WAAW,EACpBF,QAAQ,CAACR,OAAO,EAChBQ,QAAQ,CAACG,KAAK,CACf;AACH;AAGQf,EAAAA,mBAAmBA,CAACe,KAAa,EAAE9B,gBAAkC,EAAA;AAC3E,IAAA,MAAM+B,YAAY,GAAG/B,gBAAgB,CAACoB,MAAM,CAACU,KAAK,CAAuB;AACzE,IAAA,IAAI,CAACE,eAAe,CAACD,YAAY,EAAE/B,gBAAgB,CAAC;AACtD;EAGQiB,SAASA,CACfX,qBAA6B,EAC7BC,YAAoB,EACpBP,gBAAkC,EAClCsB,KAAQ,EAAA;AAER,IAAA,MAAMd,IAAI,GAAGR,gBAAgB,CAACiC,GAAG,CAAC3B,qBAAsB,CAAuB;AAC/EN,IAAAA,gBAAgB,CAACkC,IAAI,CAAC1B,IAAI,EAAED,YAAY,CAAC;AACzCC,IAAAA,IAAI,CAACW,OAAO,CAACM,SAAS,GAAGH,KAAK;AAC9B,IAAA,OAAOd,IAAI;AACb;AAMQwB,EAAAA,eAAeA,CAACxB,IAAwB,EAAER,gBAAkC,EAAA;IAClF,IAAI,IAAI,CAACH,UAAU,CAACsC,MAAM,GAAG,IAAI,CAACvC,aAAa,EAAE;AAC/C,MAAA,IAAI,CAACC,UAAU,CAACuC,IAAI,CAAC5B,IAAI,CAAC;AAC5B,KAAA,MAAO;AACL,MAAA,MAAMsB,KAAK,GAAG9B,gBAAgB,CAACqC,OAAO,CAAC7B,IAAI,CAAC;AAM5C,MAAA,IAAIsB,KAAK,KAAK,CAAC,CAAC,EAAE;QAChBtB,IAAI,CAACa,OAAO,EAAE;AAChB,OAAA,MAAO;AACLrB,QAAAA,gBAAgB,CAACsC,MAAM,CAACR,KAAK,CAAC;AAChC;AACF;AACF;AAGQN,EAAAA,oBAAoBA,CAC1BM,KAAa,EACb9B,gBAAkC,EAAA;IAElC,MAAMuB,UAAU,GAAG,IAAI,CAAC1B,UAAU,CAAC0C,GAAG,EAAE;AACxC,IAAA,IAAIhB,UAAU,EAAE;AACdvB,MAAAA,gBAAgB,CAACwC,MAAM,CAACjB,UAAU,EAAEO,KAAK,CAAC;AAC5C;IACA,OAAOP,UAAU,IAAI,IAAI;AAC3B;AACD;;;;"}