--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.cms/lib/codemirror/src/util/dom.js	Fri Oct 11 22:40:23 2024 +0000
@@ -0,0 +1,111 @@
+import { ie, ios } from "./browser.js"
+
+export function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
+
+export let rmClass = function(node, cls) {
+  let current = node.className
+  let match = classTest(cls).exec(current)
+  if (match) {
+    let after = current.slice(match.index + match[0].length)
+    node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
+  }
+}
+
+export function removeChildren(e) {
+  for (let count = e.childNodes.length; count > 0; --count)
+    e.removeChild(e.firstChild)
+  return e
+}
+
+export function removeChildrenAndAdd(parent, e) {
+  return removeChildren(parent).appendChild(e)
+}
+
+export function elt(tag, content, className, style) {
+  let e = document.createElement(tag)
+  if (className) e.className = className
+  if (style) e.style.cssText = style
+  if (typeof content == "string") e.appendChild(document.createTextNode(content))
+  else if (content) for (let i = 0; i < content.length; ++i) e.appendChild(content[i])
+  return e
+}
+// wrapper for elt, which removes the elt from the accessibility tree
+export function eltP(tag, content, className, style) {
+  let e = elt(tag, content, className, style)
+  e.setAttribute("role", "presentation")
+  return e
+}
+
+export let range
+if (document.createRange) range = function(node, start, end, endNode) {
+  let r = document.createRange()
+  r.setEnd(endNode || node, end)
+  r.setStart(node, start)
+  return r
+}
+else range = function(node, start, end) {
+  let r = document.body.createTextRange()
+  try { r.moveToElementText(node.parentNode) }
+  catch(e) { return r }
+  r.collapse(true)
+  r.moveEnd("character", end)
+  r.moveStart("character", start)
+  return r
+}
+
+export function contains(parent, child) {
+  if (child.nodeType == 3) // Android browser always returns false when child is a textnode
+    child = child.parentNode
+  if (parent.contains)
+    return parent.contains(child)
+  do {
+    if (child.nodeType == 11) child = child.host
+    if (child == parent) return true
+  } while (child = child.parentNode)
+}
+
+export function activeElt(rootNode) {
+  // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
+  // IE < 10 will throw when accessed while the page is loading or in an iframe.
+  // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
+  let doc = rootNode.ownerDocument || rootNode
+  let activeElement
+  try {
+    activeElement = rootNode.activeElement
+  } catch(e) {
+    activeElement = doc.body || null
+  }
+  while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
+    activeElement = activeElement.shadowRoot.activeElement
+  return activeElement
+}
+
+export function addClass(node, cls) {
+  let current = node.className
+  if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls
+}
+export function joinClasses(a, b) {
+  let as = a.split(" ")
+  for (let i = 0; i < as.length; i++)
+    if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i]
+  return b
+}
+
+export let selectInput = function(node) { node.select() }
+if (ios) // Mobile Safari apparently has a bug where select() is broken.
+  selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length }
+else if (ie) // Suppress mysterious IE10 errors
+  selectInput = function(node) { try { node.select() } catch(_e) {} }
+
+export function doc(cm) { return cm.display.wrapper.ownerDocument }
+
+export function root(cm) {
+  return rootNode(cm.display.wrapper)
+}
+
+export function rootNode(element) {
+  // Detect modern browsers (2017+).
+  return element.getRootNode ? element.getRootNode() : element.ownerDocument
+}
+
+export function win(cm) { return doc(cm).defaultView }