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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 { EMPTY, Observable, defer } from "rxjs"
import { Component } from "../../../_"
import { Annotation } from "../_"
import { mountAnnotationList } from "../list"
/* ----------------------------------------------------------------------------
* Helper types
* ------------------------------------------------------------------------- */
/**
* Mount options
*/
interface MountOptions {
target$: Observable<HTMLElement> /* Location target observable */
print$: Observable<boolean> /* Media print observable */
}
/* ----------------------------------------------------------------------------
* Helper functions
* ------------------------------------------------------------------------- */
/**
* Find list element directly following a block
*
* @param el - Annotation block element
*
* @returns List element or nothing
*/
function findList(el: HTMLElement): HTMLElement | undefined {
if (el.nextElementSibling) {
const sibling = el.nextElementSibling as HTMLElement
if (sibling.tagName === "OL")
return sibling
/* Skip empty paragraphs - see https://bit.ly/3r4ZJ2O */
else if (sibling.tagName === "P" && !sibling.children.length)
return findList(sibling)
}
/* Everything else */
return undefined
}
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Mount annotation block
*
* @param el - Annotation block element
* @param options - Options
*
* @returns Annotation component observable
*/
export function mountAnnotationBlock(
el: HTMLElement, options: MountOptions
): Observable<Component<Annotation>> {
return defer(() => {
const list = findList(el)
return typeof list !== "undefined"
? mountAnnotationList(list, el, options)
: EMPTY
})
}
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