Files
mkdocs-material/src/assets/javascripts/components/toc/_/index.ts
2019-12-22 16:52:28 +01:00

122 lines
3.7 KiB
TypeScript

/*
* Copyright (c) 2016-2019 Martin Donath <martin.donath@squidfunk.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
import { Observable, OperatorFunction, combineLatest, pipe } from "rxjs"
import { map, shareReplay } from "rxjs/operators"
import { switchMapIf } from "extensions"
import { Agent, getElements } from "utilities"
import { HeaderState } from "../../header"
import {
MainState,
SidebarState,
paintSidebar,
watchSidebar
} from "../../main"
import {
AnchorList,
paintAnchorList,
watchAnchorList
} from "../anchor"
/* ----------------------------------------------------------------------------
* Types
* ------------------------------------------------------------------------- */
/**
* Table of contents state
*/
export interface TableOfContentsState {
sidebar: SidebarState /* Sidebar state */
anchors: AnchorList /* Anchor list */
}
/* ----------------------------------------------------------------------------
* Helper types
* ------------------------------------------------------------------------- */
/**
* Options
*/
interface Options {
header$: Observable<HeaderState> /* Header state observable */
main$: Observable<MainState> /* Main area state observable */
}
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Watch table of contents
*
* @param el - Table of contents element
* @param agent - Agent
* @param options - Options
*
* @return Table of contents state observable
*/
export function watchTableOfContents(
el: HTMLElement, agent: Agent, { header$, main$ }: Options
): Observable<TableOfContentsState> {
/* Watch and paint sidebar */
const sidebar$ = watchSidebar(el, agent, { main$ })
.pipe(
paintSidebar(el)
)
/* Watch and paint anchor list (scroll spy) */
const els = getElements<HTMLAnchorElement>(".md-nav__link", el)
const anchors$ = watchAnchorList(els, agent, { header$ })
.pipe(
paintAnchorList(els)
)
/* Combine into a single hot observable */
return combineLatest([sidebar$, anchors$])
.pipe(
map(([sidebar, anchors]) => ({ sidebar, anchors }))
)
}
/* ------------------------------------------------------------------------- */
/**
* Mount table of contents from source observable
*
* @param agent - Agent
* @param options - Options
*
* @return Operator function
*/
export function mountTableOfContents(
agent: Agent, options: Options
): OperatorFunction<HTMLElement, TableOfContentsState> {
const { media } = agent
return pipe(
switchMapIf(media.tablet$, el => watchTableOfContents(el, agent, options)),
shareReplay(1)
)
}