sgauthier
6e64e138e2
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61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
'use strict'
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module.exports = media
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var convert = require('hast-util-is-element/convert')
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var toString = require('mdast-util-to-string')
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var visit = require('unist-util-visit')
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var all = require('../all')
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var resolve = require('../util/resolve')
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var wrap = require('../util/wrap')
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var source = convert('source')
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var video = convert('video')
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function media(h, node) {
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var nodes = all(h, node)
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var poster = video(node) && node.properties.poster
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var src = node.properties.src
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var index = -1
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var linkInFallbackContent
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visit({type: 'root', children: nodes}, 'link', findLink)
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// If the content links to something, or if it’s not phrasing…
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if (linkInFallbackContent || wrap.needed(nodes)) {
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return nodes
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}
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// Find the source.
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while (!src && ++index < node.children.length) {
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if (source(node.children[index])) {
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src = node.children[index].properties.src
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}
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}
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// If there’s a poster defined on the video, create an image.
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if (poster) {
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nodes = [
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{
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type: 'image',
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title: null,
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url: resolve(h, poster),
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alt: toString({children: nodes})
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}
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]
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}
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// Link to the media resource.
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return {
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type: 'link',
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title: node.properties.title || null,
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url: resolve(h, src),
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children: nodes
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}
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function findLink() {
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linkInFallbackContent = true
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return visit.EXIT
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}
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}
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