mirror of
https://github.com/squidfunk/mkdocs-material.git
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91 lines
2.8 KiB
TypeScript
91 lines
2.8 KiB
TypeScript
/*
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* Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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import { identity } from "ramda"
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import { Observable, OperatorFunction, pipe } from "rxjs"
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import {
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distinctUntilChanged,
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filter,
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map,
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shareReplay,
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switchMap
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} from "rxjs/operators"
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import { SearchResult } from "modules"
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import {
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SearchQuery,
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Viewport,
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paintSearchResult,
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watchElementOffset
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} from "observables"
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/* ----------------------------------------------------------------------------
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* Helper types
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* ------------------------------------------------------------------------- */
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/**
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* Options
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*/
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interface Options {
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query$: Observable<SearchQuery> /* Search query observable */
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result$: Observable<SearchResult[]> /* Search result observable */
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viewport$: Observable<Viewport> /* Viewport observable */
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}
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/* ----------------------------------------------------------------------------
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* Functions
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* ------------------------------------------------------------------------- */
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/**
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* Mount search result from source observable
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*
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* @param options - Options
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*
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* @return Operator function
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*/
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export function mountSearchResult(
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{ query$, result$, viewport$ }: Options
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): OperatorFunction<HTMLElement, SearchResult[]> {
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return pipe(
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switchMap(el => {
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const container = el.parentElement!
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/* Compute whether there are more search results to fetch */
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const fetch$ = watchElementOffset(container, { viewport$ })
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.pipe(
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map(({ y }) => {
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return y >= container.scrollHeight - container.offsetHeight - 16
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}),
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distinctUntilChanged(),
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filter(identity)
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)
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/* Paint search results */
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return result$
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.pipe(
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paintSearchResult(el, { query$, fetch$ })
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)
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}),
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shareReplay(1)
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)
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}
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