--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.cms/lib/codemirror/src/input/ContentEditableInput.js	Fri Oct 11 22:40:23 2024 +0000
@@ -0,0 +1,546 @@
+import { operation, runInOp } from "../display/operations.js"
+import { prepareSelection } from "../display/selection.js"
+import { regChange } from "../display/view_tracking.js"
+import { applyTextInput, copyableRanges, disableBrowserMagic, handlePaste, hiddenTextarea, lastCopied, setLastCopied } from "./input.js"
+import { cmp, maxPos, minPos, Pos } from "../line/pos.js"
+import { getBetween, getLine, lineNo } from "../line/utils_line.js"
+import { findViewForLine, findViewIndex, mapFromLineView, nodeAndOffsetInLineMap } from "../measurement/position_measurement.js"
+import { replaceRange } from "../model/changes.js"
+import { simpleSelection } from "../model/selection.js"
+import { setSelection } from "../model/selection_updates.js"
+import { getBidiPartAt, getOrder } from "../util/bidi.js"
+import { android, chrome, gecko, ie_version } from "../util/browser.js"
+import { activeElt, contains, range, removeChildrenAndAdd, selectInput, rootNode } from "../util/dom.js"
+import { on, signalDOMEvent } from "../util/event.js"
+import { Delayed, lst, sel_dontScroll } from "../util/misc.js"
+
+// CONTENTEDITABLE INPUT STYLE
+
+export default class ContentEditableInput {
+  constructor(cm) {
+    this.cm = cm
+    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
+    this.polling = new Delayed()
+    this.composing = null
+    this.gracePeriod = false
+    this.readDOMTimeout = null
+  }
+
+  init(display) {
+    let input = this, cm = input.cm
+    let div = input.div = display.lineDiv
+    div.contentEditable = true
+    disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize)
+
+    function belongsToInput(e) {
+      for (let t = e.target; t; t = t.parentNode) {
+        if (t == div) return true
+        if (/\bCodeMirror-(?:line)?widget\b/.test(t.className)) break
+      }
+      return false
+    }
+
+    on(div, "paste", e => {
+      if (!belongsToInput(e) || signalDOMEvent(cm, e) || handlePaste(e, cm)) return
+      // IE doesn't fire input events, so we schedule a read for the pasted content in this way
+      if (ie_version <= 11) setTimeout(operation(cm, () => this.updateFromDOM()), 20)
+    })
+
+    on(div, "compositionstart", e => {
+      this.composing = {data: e.data, done: false}
+    })
+    on(div, "compositionupdate", e => {
+      if (!this.composing) this.composing = {data: e.data, done: false}
+    })
+    on(div, "compositionend", e => {
+      if (this.composing) {
+        if (e.data != this.composing.data) this.readFromDOMSoon()
+        this.composing.done = true
+      }
+    })
+
+    on(div, "touchstart", () => input.forceCompositionEnd())
+
+    on(div, "input", () => {
+      if (!this.composing) this.readFromDOMSoon()
+    })
+
+    function onCopyCut(e) {
+      if (!belongsToInput(e) || signalDOMEvent(cm, e)) return
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()})
+        if (e.type == "cut") cm.replaceSelection("", null, "cut")
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        let ranges = copyableRanges(cm)
+        setLastCopied({lineWise: true, text: ranges.text})
+        if (e.type == "cut") {
+          cm.operation(() => {
+            cm.setSelections(ranges.ranges, 0, sel_dontScroll)
+            cm.replaceSelection("", null, "cut")
+          })
+        }
+      }
+      if (e.clipboardData) {
+        e.clipboardData.clearData()
+        let content = lastCopied.text.join("\n")
+        // iOS exposes the clipboard API, but seems to discard content inserted into it
+        e.clipboardData.setData("Text", content)
+        if (e.clipboardData.getData("Text") == content) {
+          e.preventDefault()
+          return
+        }
+      }
+      // Old-fashioned briefly-focus-a-textarea hack
+      let kludge = hiddenTextarea(), te = kludge.firstChild
+      disableBrowserMagic(te)
+      cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
+      te.value = lastCopied.text.join("\n")
+      let hadFocus = activeElt(rootNode(div))
+      selectInput(te)
+      setTimeout(() => {
+        cm.display.lineSpace.removeChild(kludge)
+        hadFocus.focus()
+        if (hadFocus == div) input.showPrimarySelection()
+      }, 50)
+    }
+    on(div, "copy", onCopyCut)
+    on(div, "cut", onCopyCut)
+  }
+
+  screenReaderLabelChanged(label) {
+    // Label for screenreaders, accessibility
+    if(label) {
+      this.div.setAttribute('aria-label', label)
+    } else {
+      this.div.removeAttribute('aria-label')
+    }
+  }
+
+  prepareSelection() {
+    let result = prepareSelection(this.cm, false)
+    result.focus = activeElt(rootNode(this.div)) == this.div
+    return result
+  }
+
+  showSelection(info, takeFocus) {
+    if (!info || !this.cm.display.view.length) return
+    if (info.focus || takeFocus) this.showPrimarySelection()
+    this.showMultipleSelections(info)
+  }
+
+  getSelection() {
+    return this.cm.display.wrapper.ownerDocument.getSelection()
+  }
+
+  showPrimarySelection() {
+    let sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary()
+    let from = prim.from(), to = prim.to()
+
+    if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
+      sel.removeAllRanges()
+      return
+    }
+
+    let curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+    let curFocus = domToPos(cm, sel.focusNode, sel.focusOffset)
+    if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
+        cmp(minPos(curAnchor, curFocus), from) == 0 &&
+        cmp(maxPos(curAnchor, curFocus), to) == 0)
+      return
+
+    let view = cm.display.view
+    let start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
+        {node: view[0].measure.map[2], offset: 0}
+    let end = to.line < cm.display.viewTo && posToDOM(cm, to)
+    if (!end) {
+      let measure = view[view.length - 1].measure
+      let map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
+      end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}
+    }
+
+    if (!start || !end) {
+      sel.removeAllRanges()
+      return
+    }
+
+    let old = sel.rangeCount && sel.getRangeAt(0), rng
+    try { rng = range(start.node, start.offset, end.offset, end.node) }
+    catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
+    if (rng) {
+      if (!gecko && cm.state.focused) {
+        sel.collapse(start.node, start.offset)
+        if (!rng.collapsed) {
+          sel.removeAllRanges()
+          sel.addRange(rng)
+        }
+      } else {
+        sel.removeAllRanges()
+        sel.addRange(rng)
+      }
+      if (old && sel.anchorNode == null) sel.addRange(old)
+      else if (gecko) this.startGracePeriod()
+    }
+    this.rememberSelection()
+  }
+
+  startGracePeriod() {
+    clearTimeout(this.gracePeriod)
+    this.gracePeriod = setTimeout(() => {
+      this.gracePeriod = false
+      if (this.selectionChanged())
+        this.cm.operation(() => this.cm.curOp.selectionChanged = true)
+    }, 20)
+  }
+
+  showMultipleSelections(info) {
+    removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
+    removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
+  }
+
+  rememberSelection() {
+    let sel = this.getSelection()
+    this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
+    this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
+  }
+
+  selectionInEditor() {
+    let sel = this.getSelection()
+    if (!sel.rangeCount) return false
+    let node = sel.getRangeAt(0).commonAncestorContainer
+    return contains(this.div, node)
+  }
+
+  focus() {
+    if (this.cm.options.readOnly != "nocursor") {
+      if (!this.selectionInEditor() || activeElt(rootNode(this.div)) != this.div)
+        this.showSelection(this.prepareSelection(), true)
+      this.div.focus()
+    }
+  }
+  blur() { this.div.blur() }
+  getField() { return this.div }
+
+  supportsTouch() { return true }
+
+  receivedFocus() {
+    let input = this
+    if (this.selectionInEditor())
+      setTimeout(() => this.pollSelection(), 20)
+    else
+      runInOp(this.cm, () => input.cm.curOp.selectionChanged = true)
+
+    function poll() {
+      if (input.cm.state.focused) {
+        input.pollSelection()
+        input.polling.set(input.cm.options.pollInterval, poll)
+      }
+    }
+    this.polling.set(this.cm.options.pollInterval, poll)
+  }
+
+  selectionChanged() {
+    let sel = this.getSelection()
+    return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
+      sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
+  }
+
+  pollSelection() {
+    if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) return
+    let sel = this.getSelection(), cm = this.cm
+    // On Android Chrome (version 56, at least), backspacing into an
+    // uneditable block element will put the cursor in that element,
+    // and then, because it's not editable, hide the virtual keyboard.
+    // Because Android doesn't allow us to actually detect backspace
+    // presses in a sane way, this code checks for when that happens
+    // and simulates a backspace press in this case.
+    if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
+      this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs})
+      this.blur()
+      this.focus()
+      return
+    }
+    if (this.composing) return
+    this.rememberSelection()
+    let anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
+    let head = domToPos(cm, sel.focusNode, sel.focusOffset)
+    if (anchor && head) runInOp(cm, () => {
+      setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
+      if (anchor.bad || head.bad) cm.curOp.selectionChanged = true
+    })
+  }
+
+  pollContent() {
+    if (this.readDOMTimeout != null) {
+      clearTimeout(this.readDOMTimeout)
+      this.readDOMTimeout = null
+    }
+
+    let cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
+    let from = sel.from(), to = sel.to()
+    if (from.ch == 0 && from.line > cm.firstLine())
+      from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length)
+    if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
+      to = Pos(to.line + 1, 0)
+    if (from.line < display.viewFrom || to.line > display.viewTo - 1) return false
+
+    let fromIndex, fromLine, fromNode
+    if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
+      fromLine = lineNo(display.view[0].line)
+      fromNode = display.view[0].node
+    } else {
+      fromLine = lineNo(display.view[fromIndex].line)
+      fromNode = display.view[fromIndex - 1].node.nextSibling
+    }
+    let toIndex = findViewIndex(cm, to.line)
+    let toLine, toNode
+    if (toIndex == display.view.length - 1) {
+      toLine = display.viewTo - 1
+      toNode = display.lineDiv.lastChild
+    } else {
+      toLine = lineNo(display.view[toIndex + 1].line) - 1
+      toNode = display.view[toIndex + 1].node.previousSibling
+    }
+
+    if (!fromNode) return false
+    let newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
+    let oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
+    while (newText.length > 1 && oldText.length > 1) {
+      if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
+      else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
+      else break
+    }
+
+    let cutFront = 0, cutEnd = 0
+    let newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
+    while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
+      ++cutFront
+    let newBot = lst(newText), oldBot = lst(oldText)
+    let maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
+                             oldBot.length - (oldText.length == 1 ? cutFront : 0))
+    while (cutEnd < maxCutEnd &&
+           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
+      ++cutEnd
+    // Try to move start of change to start of selection if ambiguous
+    if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
+      while (cutFront && cutFront > from.ch &&
+             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
+        cutFront--
+        cutEnd++
+      }
+    }
+
+    newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "")
+    newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "")
+
+    let chFrom = Pos(fromLine, cutFront)
+    let chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
+    if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
+      replaceRange(cm.doc, newText, chFrom, chTo, "+input")
+      return true
+    }
+  }
+
+  ensurePolled() {
+    this.forceCompositionEnd()
+  }
+  reset() {
+    this.forceCompositionEnd()
+  }
+  forceCompositionEnd() {
+    if (!this.composing) return
+    clearTimeout(this.readDOMTimeout)
+    this.composing = null
+    this.updateFromDOM()
+    this.div.blur()
+    this.div.focus()
+  }
+  readFromDOMSoon() {
+    if (this.readDOMTimeout != null) return
+    this.readDOMTimeout = setTimeout(() => {
+      this.readDOMTimeout = null
+      if (this.composing) {
+        if (this.composing.done) this.composing = null
+        else return
+      }
+      this.updateFromDOM()
+    }, 80)
+  }
+
+  updateFromDOM() {
+    if (this.cm.isReadOnly() || !this.pollContent())
+      runInOp(this.cm, () => regChange(this.cm))
+  }
+
+  setUneditable(node) {
+    node.contentEditable = "false"
+  }
+
+  onKeyPress(e) {
+    if (e.charCode == 0 || this.composing) return
+    e.preventDefault()
+    if (!this.cm.isReadOnly())
+      operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0)
+  }
+
+  readOnlyChanged(val) {
+    this.div.contentEditable = String(val != "nocursor")
+  }
+
+  onContextMenu() {}
+  resetPosition() {}
+}
+
+ContentEditableInput.prototype.needsContentAttribute = true
+
+function posToDOM(cm, pos) {
+  let view = findViewForLine(cm, pos.line)
+  if (!view || view.hidden) return null
+  let line = getLine(cm.doc, pos.line)
+  let info = mapFromLineView(view, line, pos.line)
+
+  let order = getOrder(line, cm.doc.direction), side = "left"
+  if (order) {
+    let partPos = getBidiPartAt(order, pos.ch)
+    side = partPos % 2 ? "right" : "left"
+  }
+  let result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
+  result.offset = result.collapse == "right" ? result.end : result.start
+  return result
+}
+
+function isInGutter(node) {
+  for (let scan = node; scan; scan = scan.parentNode)
+    if (/CodeMirror-gutter-wrapper/.test(scan.className)) return true
+  return false
+}
+
+function badPos(pos, bad) { if (bad) pos.bad = true; return pos }
+
+function domTextBetween(cm, from, to, fromLine, toLine) {
+  let text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false
+  function recognizeMarker(id) { return marker => marker.id == id }
+  function close() {
+    if (closing) {
+      text += lineSep
+      if (extraLinebreak) text += lineSep
+      closing = extraLinebreak = false
+    }
+  }
+  function addText(str) {
+    if (str) {
+      close()
+      text += str
+    }
+  }
+  function walk(node) {
+    if (node.nodeType == 1) {
+      let cmText = node.getAttribute("cm-text")
+      if (cmText) {
+        addText(cmText)
+        return
+      }
+      let markerID = node.getAttribute("cm-marker"), range
+      if (markerID) {
+        let found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
+        if (found.length && (range = found[0].find(0)))
+          addText(getBetween(cm.doc, range.from, range.to).join(lineSep))
+        return
+      }
+      if (node.getAttribute("contenteditable") == "false") return
+      let isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName)
+      if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) return
+
+      if (isBlock) close()
+      for (let i = 0; i < node.childNodes.length; i++)
+        walk(node.childNodes[i])
+
+      if (/^(pre|p)$/i.test(node.nodeName)) extraLinebreak = true
+      if (isBlock) closing = true
+    } else if (node.nodeType == 3) {
+      addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "))
+    }
+  }
+  for (;;) {
+    walk(from)
+    if (from == to) break
+    from = from.nextSibling
+    extraLinebreak = false
+  }
+  return text
+}
+
+function domToPos(cm, node, offset) {
+  let lineNode
+  if (node == cm.display.lineDiv) {
+    lineNode = cm.display.lineDiv.childNodes[offset]
+    if (!lineNode) return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true)
+    node = null; offset = 0
+  } else {
+    for (lineNode = node;; lineNode = lineNode.parentNode) {
+      if (!lineNode || lineNode == cm.display.lineDiv) return null
+      if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) break
+    }
+  }
+  for (let i = 0; i < cm.display.view.length; i++) {
+    let lineView = cm.display.view[i]
+    if (lineView.node == lineNode)
+      return locateNodeInLineView(lineView, node, offset)
+  }
+}
+
+function locateNodeInLineView(lineView, node, offset) {
+  let wrapper = lineView.text.firstChild, bad = false
+  if (!node || !contains(wrapper, node)) return badPos(Pos(lineNo(lineView.line), 0), true)
+  if (node == wrapper) {
+    bad = true
+    node = wrapper.childNodes[offset]
+    offset = 0
+    if (!node) {
+      let line = lineView.rest ? lst(lineView.rest) : lineView.line
+      return badPos(Pos(lineNo(line), line.text.length), bad)
+    }
+  }
+
+  let textNode = node.nodeType == 3 ? node : null, topNode = node
+  if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
+    textNode = node.firstChild
+    if (offset) offset = textNode.nodeValue.length
+  }
+  while (topNode.parentNode != wrapper) topNode = topNode.parentNode
+  let measure = lineView.measure, maps = measure.maps
+
+  function find(textNode, topNode, offset) {
+    for (let i = -1; i < (maps ? maps.length : 0); i++) {
+      let map = i < 0 ? measure.map : maps[i]
+      for (let j = 0; j < map.length; j += 3) {
+        let curNode = map[j + 2]
+        if (curNode == textNode || curNode == topNode) {
+          let line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
+          let ch = map[j] + offset
+          if (offset < 0 || curNode != textNode) ch = map[j + (offset ? 1 : 0)]
+          return Pos(line, ch)
+        }
+      }
+    }
+  }
+  let found = find(textNode, topNode, offset)
+  if (found) return badPos(found, bad)
+
+  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
+  for (let after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
+    found = find(after, after.firstChild, 0)
+    if (found)
+      return badPos(Pos(found.line, found.ch - dist), bad)
+    else
+      dist += after.textContent.length
+  }
+  for (let before = topNode.previousSibling, dist = offset; before; before = before.previousSibling) {
+    found = find(before, before.firstChild, -1)
+    if (found)
+      return badPos(Pos(found.line, found.ch + dist), bad)
+    else
+      dist += before.textContent.length
+  }
+}