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import {Slice, Fragment, DOMParser, DOMSerializer, ResolvedPos, NodeType, Node} from "prosemirror-model"
import * as browser from "./browser"
import {EditorView} from "./index"
export function serializeForClipboard(view: EditorView, slice: Slice) {
view.someProp("transformCopied", f => { slice = f(slice!, view) })
let context = [], {content, openStart, openEnd} = slice
while (openStart > 1 && openEnd > 1 && content.childCount == 1 && content.firstChild!.childCount == 1) {
openStart--
openEnd--
let node = content.firstChild!
context.push(node.type.name, node.attrs != node.type.defaultAttrs ? node.attrs : null)
content = node.content
}
let serializer = view.someProp("clipboardSerializer") || DOMSerializer.fromSchema(view.state.schema)
let doc = detachedDoc(), wrap = doc.createElement("div")
wrap.appendChild(serializer.serializeFragment(content, {document: doc}))
let firstChild = wrap.firstChild, needsWrap, wrappers = 0
while (firstChild && firstChild.nodeType == 1 && (needsWrap = wrapMap[firstChild.nodeName.toLowerCase()])) {
for (let i = needsWrap.length - 1; i >= 0; i--) {
let wrapper = doc.createElement(needsWrap[i])
while (wrap.firstChild) wrapper.appendChild(wrap.firstChild)
wrap.appendChild(wrapper)
wrappers++
}
firstChild = wrap.firstChild
}
if (firstChild && firstChild.nodeType == 1)
(firstChild as HTMLElement).setAttribute(
"data-pm-slice", `${openStart} ${openEnd}${wrappers ? ` -${wrappers}` : ""} ${JSON.stringify(context)}`)
let text = view.someProp("clipboardTextSerializer", f => f(slice, view)) ||
slice.content.textBetween(0, slice.content.size, "\n\n")
return {dom: wrap, text, slice}
}
// Read a slice of content from the clipboard (or drop data).
export function parseFromClipboard(view: EditorView, text: string, html: string | null, plainText: boolean, $context: ResolvedPos) {
let inCode = $context.parent.type.spec.code
let dom: HTMLElement | undefined, slice: Slice | undefined
if (!html && !text) return null
let asText = !!text && (plainText || inCode || !html)
if (asText) {
view.someProp("transformPastedText", f => { text = f(text, inCode || plainText, view) })
if (inCode) {
slice = new Slice(Fragment.from(view.state.schema.text(text.replace(/\r\n?/g, "\n"))), 0, 0)
view.someProp("transformPasted", f => { slice = f(slice!, view, true) })
return slice
}
let parsed = view.someProp("clipboardTextParser", f => f(text, $context, plainText, view))
if (parsed) {
slice = parsed
} else {
let marks = $context.marks()
let {schema} = view.state, serializer = DOMSerializer.fromSchema(schema)
dom = document.createElement("div")
text.split(/(?:\r\n?|\n)+/).forEach(block => {
let p = dom!.appendChild(document.createElement("p"))
if (block) p.appendChild(serializer.serializeNode(schema.text(block, marks)))
})
}
} else {
view.someProp("transformPastedHTML", f => { html = f(html!, view) })
dom = readHTML(html!)
if (browser.webkit) restoreReplacedSpaces(dom)
}
let contextNode = dom && dom.querySelector("[data-pm-slice]")
let sliceData = contextNode && /^(\d+) (\d+)(?: -(\d+))? (.*)/.exec(contextNode.getAttribute("data-pm-slice") || "")
if (sliceData && sliceData[3]) for (let i = +sliceData[3]; i > 0; i--) {
let child = dom!.firstChild
while (child && child.nodeType != 1) child = child.nextSibling
if (!child) break
dom = child as HTMLElement
}
if (!slice) {
let parser = view.someProp("clipboardParser") || view.someProp("domParser") || DOMParser.fromSchema(view.state.schema)
slice = parser.parseSlice(dom!, {
preserveWhitespace: !!(asText || sliceData),
context: $context,
ruleFromNode(dom) {
if (dom.nodeName == "BR" && !dom.nextSibling &&
dom.parentNode && !inlineParents.test(dom.parentNode.nodeName)) return {ignore: true}
return null
}
})
}
if (sliceData) {
slice = addContext(closeSlice(slice, +sliceData[1], +sliceData[2]), sliceData[4])
} else { // HTML wasn't created by ProseMirror. Make sure top-level siblings are coherent
slice = Slice.maxOpen(normalizeSiblings(slice.content, $context), true)
if (slice.openStart || slice.openEnd) {
let openStart = 0, openEnd = 0
for (let node = slice.content.firstChild; openStart < slice.openStart && !node!.type.spec.isolating;
openStart++, node = node!.firstChild) {}
for (let node = slice.content.lastChild; openEnd < slice.openEnd && !node!.type.spec.isolating;
openEnd++, node = node!.lastChild) {}
slice = closeSlice(slice, openStart, openEnd)
}
}
view.someProp("transformPasted", f => { slice = f(slice!, view, asText) })
return slice
}
const inlineParents = /^(a|abbr|acronym|b|cite|code|del|em|i|ins|kbd|label|output|q|ruby|s|samp|span|strong|sub|sup|time|u|tt|var)$/i
// Takes a slice parsed with parseSlice, which means there hasn't been
// any content-expression checking done on the top nodes, tries to
// find a parent node in the current context that might fit the nodes,
// and if successful, rebuilds the slice so that it fits into that parent.
//
// This addresses the problem that Transform.replace expects a
// coherent slice, and will fail to place a set of siblings that don't
// fit anywhere in the schema.
function normalizeSiblings(fragment: Fragment, $context: ResolvedPos) {
if (fragment.childCount < 2) return fragment
for (let d = $context.depth; d >= 0; d--) {
let parent = $context.node(d)
let match = parent.contentMatchAt($context.index(d))
let lastWrap: readonly NodeType[] | undefined, result: Node[] | null = []
fragment.forEach(node => {
if (!result) return
let wrap = match.findWrapping(node.type), inLast
if (!wrap) return result = null
if (inLast = result.length && lastWrap!.length && addToSibling(wrap, lastWrap!, node, result[result.length - 1], 0)) {
result[result.length - 1] = inLast
} else {
if (result.length) result[result.length - 1] = closeRight(result[result.length - 1], lastWrap!.length)
let wrapped = withWrappers(node, wrap)
result.push(wrapped)
match = match.matchType(wrapped.type)!
lastWrap = wrap
}
})
if (result) return Fragment.from(result)
}
return fragment
}
function withWrappers(node: Node, wrap: readonly NodeType[], from = 0) {
for (let i = wrap.length - 1; i >= from; i--)
node = wrap[i].create(null, Fragment.from(node))
return node
}
// Used to group adjacent nodes wrapped in similar parents by
// normalizeSiblings into the same parent node
function addToSibling(wrap: readonly NodeType[], lastWrap: readonly NodeType[],
node: Node, sibling: Node, depth: number): Node | undefined {
if (depth < wrap.length && depth < lastWrap.length && wrap[depth] == lastWrap[depth]) {
let inner = addToSibling(wrap, lastWrap, node, sibling.lastChild!, depth + 1)
if (inner) return sibling.copy(sibling.content.replaceChild(sibling.childCount - 1, inner))
let match = sibling.contentMatchAt(sibling.childCount)
if (match.matchType(depth == wrap.length - 1 ? node.type : wrap[depth + 1]))
return sibling.copy(sibling.content.append(Fragment.from(withWrappers(node, wrap, depth + 1))))
}
}
function closeRight(node: Node, depth: number) {
if (depth == 0) return node
let fragment = node.content.replaceChild(node.childCount - 1, closeRight(node.lastChild!, depth - 1))
let fill = node.contentMatchAt(node.childCount).fillBefore(Fragment.empty, true)!
return node.copy(fragment.append(fill))
}
function closeRange(fragment: Fragment, side: number, from: number, to: number, depth: number, openEnd: number) {
let node = side < 0 ? fragment.firstChild! : fragment.lastChild!, inner = node.content
if (fragment.childCount > 1) openEnd = 0
if (depth < to - 1) inner = closeRange(inner, side, from, to, depth + 1, openEnd)
if (depth >= from)
inner = side < 0 ? node.contentMatchAt(0)!.fillBefore(inner, openEnd <= depth)!.append(inner)
: inner.append(node.contentMatchAt(node.childCount)!.fillBefore(Fragment.empty, true)!)
return fragment.replaceChild(side < 0 ? 0 : fragment.childCount - 1, node.copy(inner))
}
function closeSlice(slice: Slice, openStart: number, openEnd: number) {
if (openStart < slice.openStart)
slice = new Slice(closeRange(slice.content, -1, openStart, slice.openStart, 0, slice.openEnd), openStart, slice.openEnd)
if (openEnd < slice.openEnd)
slice = new Slice(closeRange(slice.content, 1, openEnd, slice.openEnd, 0, 0), slice.openStart, openEnd)
return slice
}
// Trick from jQuery -- some elements must be wrapped in other
// elements for innerHTML to work. I.e. if you do `div.innerHTML =
// "<td>..</td>"` the table cells are ignored.
const wrapMap: {[node: string]: string[]} = {
thead: ["table"],
tbody: ["table"],
tfoot: ["table"],
caption: ["table"],
colgroup: ["table"],
col: ["table", "colgroup"],
tr: ["table", "tbody"],
td: ["table", "tbody", "tr"],
th: ["table", "tbody", "tr"]
}
let _detachedDoc: Document | null = null
function detachedDoc() {
return _detachedDoc || (_detachedDoc = document.implementation.createHTMLDocument("title"))
}
let _policy: any = null
function maybeWrapTrusted(html: string): string {
let trustedTypes = (window as any).trustedTypes
if (!trustedTypes) return html
// With the require-trusted-types-for CSP, Chrome will block
// innerHTML, even on a detached document. This wraps the string in
// a way that makes the browser allow us to use its parser again.
if (!_policy)
_policy = trustedTypes.defaultPolicy || trustedTypes.createPolicy("ProseMirrorClipboard", {createHTML: (s: string) => s})
return _policy.createHTML(html)
}
function readHTML(html: string) {
let metas = /^(\s*<meta [^>]*>)*/.exec(html)
if (metas) html = html.slice(metas[0].length)
let elt = detachedDoc().createElement("div")
let firstTag = /<([a-z][^>\s]+)/i.exec(html), wrap
if (wrap = firstTag && wrapMap[firstTag[1].toLowerCase()])
html = wrap.map(n => "<" + n + ">").join("") + html + wrap.map(n => "</" + n + ">").reverse().join("")
elt.innerHTML = maybeWrapTrusted(html)
if (wrap) for (let i = 0; i < wrap.length; i++) elt = elt.querySelector(wrap[i]) || elt
return elt
}
// Webkit browsers do some hard-to-predict replacement of regular
// spaces with non-breaking spaces when putting content on the
// clipboard. This tries to convert such non-breaking spaces (which
// will be wrapped in a plain span on Chrome, a span with class
// Apple-converted-space on Safari) back to regular spaces.
function restoreReplacedSpaces(dom: HTMLElement) {
let nodes = dom.querySelectorAll(browser.chrome ? "span:not([class]):not([style])" : "span.Apple-converted-space")
for (let i = 0; i < nodes.length; i++) {
let node = nodes[i]
if (node.childNodes.length == 1 && node.textContent == "\u00a0" && node.parentNode)
node.parentNode.replaceChild(dom.ownerDocument.createTextNode(" "), node)
}
}
function addContext(slice: Slice, context: string) {
if (!slice.size) return slice
let schema = slice.content.firstChild!.type.schema, array
try { array = JSON.parse(context) }
catch(e) { return slice }
let {content, openStart, openEnd} = slice
for (let i = array.length - 2; i >= 0; i -= 2) {
let type = schema.nodes[array[i]]
if (!type || type.hasRequiredAttrs()) break
content = Fragment.from(type.create(array[i + 1], content))
openStart++; openEnd++
}
return new Slice(content, openStart, openEnd)
}