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/**
* TipTap is a stateful rich-text editor, which is extremely useful
* when you _want_ it to be stateful formatting such as bold and italics.
*
* However we also use "stateless" behaviors, specifically for URLs
* where the text itself drives the formatting.
*
* This plugin uses a regex to detect URIs and then applies
* link decorations (a <span> with the "autolink") class. That avoids
* adding any stateful formatting to TipTap's document model.
*
* We then run the URI detection again when constructing the
* RichText object from TipTap's output and merge their features into
* the facet-set.
*/
import {URL_REGEX} from '@atproto/api'
import {Mark} from '@tiptap/core'
import {type Node as ProsemirrorNode} from '@tiptap/pm/model'
import {Plugin, PluginKey} from '@tiptap/pm/state'
import {Decoration, DecorationSet} from '@tiptap/pm/view'
import {isValidDomain} from '#/lib/strings/url-helpers'
export const LinkDecorator = Mark.create({
name: 'link-decorator',
priority: 1000,
keepOnSplit: false,
inclusive() {
return true
},
addProseMirrorPlugins() {
return [linkDecorator()]
},
})
function getDecorations(doc: ProsemirrorNode) {
const decorations: Decoration[] = []
doc.descendants((node, pos) => {
if (node.isText && node.text) {
const textContent = node.textContent
// links
iterateUris(textContent, (from, to) => {
decorations.push(
Decoration.inline(pos + from, pos + to, {
class: 'autolink',
}),
)
})
}
})
return DecorationSet.create(doc, decorations)
}
function linkDecorator() {
const linkDecoratorPlugin: Plugin = new Plugin({
key: new PluginKey('link-decorator'),
state: {
init: (_, {doc}) => getDecorations(doc),
apply: (transaction, decorationSet) => {
if (transaction.docChanged) {
return getDecorations(transaction.doc)
}
return decorationSet.map(transaction.mapping, transaction.doc)
},
},
props: {
decorations(state) {
return linkDecoratorPlugin.getState(state)
},
},
})
return linkDecoratorPlugin
}
function iterateUris(str: string, cb: (from: number, to: number) => void) {
let match
const re = URL_REGEX
while ((match = re.exec(str))) {
let uri = match[2]
if (!uri.startsWith('http')) {
const domain = match.groups?.domain
if (!domain || !isValidDomain(domain)) {
continue
}
uri = `https://${uri}`
}
let from = str.indexOf(match[2], match.index)
let to = from + match[2].length
// strip ending puncuation
if (/[.,;!?]$/.test(uri)) {
uri = uri.slice(0, -1)
to--
}
if (/[)]$/.test(uri) && !uri.includes('(')) {
uri = uri.slice(0, -1)
to--
}
cb(from, to)
}
}
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