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/*
* Copyright (c) 2016-2023 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,
ObservableInput,
combineLatest,
filter,
map,
startWith
} from "rxjs"
import { getLocation } from "~/browser"
import {
SearchIndex,
setupSearchHighlighter
} from "~/integrations"
import { h } from "~/utilities"
import { Component } from "../../_"
/* ----------------------------------------------------------------------------
* Types
* ------------------------------------------------------------------------- */
/**
* Search highlighting
*/
export interface SearchHighlight {
nodes: Map<ChildNode, string> /* Map of replacements */
}
/* ----------------------------------------------------------------------------
* Helper types
* ------------------------------------------------------------------------- */
/**
* Mount options
*/
interface MountOptions {
index$: ObservableInput<SearchIndex> /* Search index observable */
location$: Observable<URL> /* Location observable */
}
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Mount search highlighting
*
* @param el - Content element
* @param options - Options
*
* @returns Search highlighting component observable
*/
export function mountSearchHiglight(
el: HTMLElement, { index$, location$ }: MountOptions
): Observable<Component<SearchHighlight>> {
return combineLatest([
index$,
location$
.pipe(
startWith(getLocation()),
filter(url => !!url.searchParams.get("h"))
)
])
.pipe(
map(([index, url]) => setupSearchHighlighter(index.config)(
url.searchParams.get("h")!
)),
map(fn => {
const nodes = new Map<ChildNode, string>()
/* Traverse text nodes and collect matches */
const it = document.createNodeIterator(el, NodeFilter.SHOW_TEXT)
for (let node = it.nextNode(); node; node = it.nextNode()) {
if (node.parentElement?.offsetHeight) {
const original = node.textContent!
const replaced = fn(original)
if (replaced.length > original.length)
nodes.set(node as ChildNode, replaced)
}
}
/* Replace original nodes with matches */
for (const [node, text] of nodes) {
const { childNodes } = h("span", null, text)
node.replaceWith(...Array.from(childNodes))
}
/* Return component */
return { ref: el, nodes }
})
)
}
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