planning

node_modules/codemirror/src/input/ContentEditableInput.js

@@ -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
+  }
+}

node_modules/codemirror/src/input/TextareaInput.js

@@ -0,0 +1,380 @@
+import { operation, runInOp } from "../display/operations.js"
+import { prepareSelection } from "../display/selection.js"
+import { applyTextInput, copyableRanges, handlePaste, hiddenTextarea, disableBrowserMagic, setLastCopied } from "./input.js"
+import { cursorCoords, posFromMouse } from "../measurement/position_measurement.js"
+import { eventInWidget } from "../measurement/widgets.js"
+import { simpleSelection } from "../model/selection.js"
+import { selectAll, setSelection } from "../model/selection_updates.js"
+import { captureRightClick, ie, ie_version, ios, mac, mobile, presto, webkit } from "../util/browser.js"
+import { activeElt, removeChildrenAndAdd, selectInput, rootNode } from "../util/dom.js"
+import { e_preventDefault, e_stop, off, on, signalDOMEvent } from "../util/event.js"
+import { hasSelection } from "../util/feature_detection.js"
+import { Delayed, sel_dontScroll } from "../util/misc.js"
+
+// TEXTAREA INPUT STYLE
+
+export default class TextareaInput {
+  constructor(cm) {
+    this.cm = cm
+    // See input.poll and input.reset
+    this.prevInput = ""
+
+    // Flag that indicates whether we expect input to appear real soon
+    // now (after some event like 'keypress' or 'input') and are
+    // polling intensively.
+    this.pollingFast = false
+    // Self-resetting timeout for the poller
+    this.polling = new Delayed()
+    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
+    this.hasSelection = false
+    this.composing = null
+    this.resetting = false
+  }
+
+  init(display) {
+    let input = this, cm = this.cm
+    this.createField(display)
+    const te = this.textarea
+
+    display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild)
+
+    // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
+    if (ios) te.style.width = "0px"
+
+    on(te, "input", () => {
+      if (ie && ie_version >= 9 && this.hasSelection) this.hasSelection = null
+      input.poll()
+    })
+
+    on(te, "paste", e => {
+      if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return
+
+      cm.state.pasteIncoming = +new Date
+      input.fastPoll()
+    })
+
+    function prepareCopyCut(e) {
+      if (signalDOMEvent(cm, e)) return
+      if (cm.somethingSelected()) {
+        setLastCopied({lineWise: false, text: cm.getSelections()})
+      } else if (!cm.options.lineWiseCopyCut) {
+        return
+      } else {
+        let ranges = copyableRanges(cm)
+        setLastCopied({lineWise: true, text: ranges.text})
+        if (e.type == "cut") {
+          cm.setSelections(ranges.ranges, null, sel_dontScroll)
+        } else {
+          input.prevInput = ""
+          te.value = ranges.text.join("\n")
+          selectInput(te)
+        }
+      }
+      if (e.type == "cut") cm.state.cutIncoming = +new Date
+    }
+    on(te, "cut", prepareCopyCut)
+    on(te, "copy", prepareCopyCut)
+
+    on(display.scroller, "paste", e => {
+      if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return
+      if (!te.dispatchEvent) {
+        cm.state.pasteIncoming = +new Date
+        input.focus()
+        return
+      }
+
+      // Pass the `paste` event to the textarea so it's handled by its event listener.
+      const event = new Event("paste")
+      event.clipboardData = e.clipboardData
+      te.dispatchEvent(event)
+    })
+
+    // Prevent normal selection in the editor (we handle our own)
+    on(display.lineSpace, "selectstart", e => {
+      if (!eventInWidget(display, e)) e_preventDefault(e)
+    })
+
+    on(te, "compositionstart", () => {
+      let start = cm.getCursor("from")
+      if (input.composing) input.composing.range.clear()
+      input.composing = {
+        start: start,
+        range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
+      }
+    })
+    on(te, "compositionend", () => {
+      if (input.composing) {
+        input.poll()
+        input.composing.range.clear()
+        input.composing = null
+      }
+    })
+  }
+
+  createField(_display) {
+    // Wraps and hides input textarea
+    this.wrapper = hiddenTextarea()
+    // The semihidden textarea that is focused when the editor is
+    // focused, and receives input.
+    this.textarea = this.wrapper.firstChild
+    let opts = this.cm.options
+    disableBrowserMagic(this.textarea, opts.spellcheck, opts.autocorrect, opts.autocapitalize)
+  }
+
+  screenReaderLabelChanged(label) {
+    // Label for screenreaders, accessibility
+    if(label) {
+      this.textarea.setAttribute('aria-label', label)
+    } else {
+      this.textarea.removeAttribute('aria-label')
+    }
+  }
+
+  prepareSelection() {
+    // Redraw the selection and/or cursor
+    let cm = this.cm, display = cm.display, doc = cm.doc
+    let result = prepareSelection(cm)
+
+    // Move the hidden textarea near the cursor to prevent scrolling artifacts
+    if (cm.options.moveInputWithCursor) {
+      let headPos = cursorCoords(cm, doc.sel.primary().head, "div")
+      let wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
+      result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+                                          headPos.top + lineOff.top - wrapOff.top))
+      result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+                                           headPos.left + lineOff.left - wrapOff.left))
+    }
+
+    return result
+  }
+
+  showSelection(drawn) {
+    let cm = this.cm, display = cm.display
+    removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
+    removeChildrenAndAdd(display.selectionDiv, drawn.selection)
+    if (drawn.teTop != null) {
+      this.wrapper.style.top = drawn.teTop + "px"
+      this.wrapper.style.left = drawn.teLeft + "px"
+    }
+  }
+
+  // Reset the input to correspond to the selection (or to be empty,
+  // when not typing and nothing is selected)
+  reset(typing) {
+    if (this.contextMenuPending || this.composing && typing) return
+    let cm = this.cm
+    this.resetting = true
+    if (cm.somethingSelected()) {
+      this.prevInput = ""
+      let content = cm.getSelection()
+      this.textarea.value = content
+      if (cm.state.focused) selectInput(this.textarea)
+      if (ie && ie_version >= 9) this.hasSelection = content
+    } else if (!typing) {
+      this.prevInput = this.textarea.value = ""
+      if (ie && ie_version >= 9) this.hasSelection = null
+    }
+    this.resetting = false
+  }
+
+  getField() { return this.textarea }
+
+  supportsTouch() { return false }
+
+  focus() {
+    if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt(rootNode(this.textarea)) != this.textarea)) {
+      try { this.textarea.focus() }
+      catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
+    }
+  }
+
+  blur() { this.textarea.blur() }
+
+  resetPosition() {
+    this.wrapper.style.top = this.wrapper.style.left = 0
+  }
+
+  receivedFocus() { this.slowPoll() }
+
+  // Poll for input changes, using the normal rate of polling. This
+  // runs as long as the editor is focused.
+  slowPoll() {
+    if (this.pollingFast) return
+    this.polling.set(this.cm.options.pollInterval, () => {
+      this.poll()
+      if (this.cm.state.focused) this.slowPoll()
+    })
+  }
+
+  // When an event has just come in that is likely to add or change
+  // something in the input textarea, we poll faster, to ensure that
+  // the change appears on the screen quickly.
+  fastPoll() {
+    let missed = false, input = this
+    input.pollingFast = true
+    function p() {
+      let changed = input.poll()
+      if (!changed && !missed) {missed = true; input.polling.set(60, p)}
+      else {input.pollingFast = false; input.slowPoll()}
+    }
+    input.polling.set(20, p)
+  }
+
+  // Read input from the textarea, and update the document to match.
+  // When something is selected, it is present in the textarea, and
+  // selected (unless it is huge, in which case a placeholder is
+  // used). When nothing is selected, the cursor sits after previously
+  // seen text (can be empty), which is stored in prevInput (we must
+  // not reset the textarea when typing, because that breaks IME).
+  poll() {
+    let cm = this.cm, input = this.textarea, prevInput = this.prevInput
+    // Since this is called a *lot*, try to bail out as cheaply as
+    // possible when it is clear that nothing happened. hasSelection
+    // will be the case when there is a lot of text in the textarea,
+    // in which case reading its value would be expensive.
+    if (this.contextMenuPending || this.resetting || !cm.state.focused ||
+        (hasSelection(input) && !prevInput && !this.composing) ||
+        cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
+      return false
+
+    let text = input.value
+    // If nothing changed, bail.
+    if (text == prevInput && !cm.somethingSelected()) return false
+    // Work around nonsensical selection resetting in IE9/10, and
+    // inexplicable appearance of private area unicode characters on
+    // some key combos in Mac (#2689).
+    if (ie && ie_version >= 9 && this.hasSelection === text ||
+        mac && /[\uf700-\uf7ff]/.test(text)) {
+      cm.display.input.reset()
+      return false
+    }
+
+    if (cm.doc.sel == cm.display.selForContextMenu) {
+      let first = text.charCodeAt(0)
+      if (first == 0x200b && !prevInput) prevInput = "\u200b"
+      if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
+    }
+    // Find the part of the input that is actually new
+    let same = 0, l = Math.min(prevInput.length, text.length)
+    while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same
+
+    runInOp(cm, () => {
+      applyTextInput(cm, text.slice(same), prevInput.length - same,
+                     null, this.composing ? "*compose" : null)
+
+      // Don't leave long text in the textarea, since it makes further polling slow
+      if (text.length > 1000 || text.indexOf("\n") > -1) input.value = this.prevInput = ""
+      else this.prevInput = text
+
+      if (this.composing) {
+        this.composing.range.clear()
+        this.composing.range = cm.markText(this.composing.start, cm.getCursor("to"),
+                                           {className: "CodeMirror-composing"})
+      }
+    })
+    return true
+  }
+
+  ensurePolled() {
+    if (this.pollingFast && this.poll()) this.pollingFast = false
+  }
+
+  onKeyPress() {
+    if (ie && ie_version >= 9) this.hasSelection = null
+    this.fastPoll()
+  }
+
+  onContextMenu(e) {
+    let input = this, cm = input.cm, display = cm.display, te = input.textarea
+    if (input.contextMenuPending) input.contextMenuPending()
+    let pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop
+    if (!pos || presto) return // Opera is difficult.
+
+    // Reset the current text selection only if the click is done outside of the selection
+    // and 'resetSelectionOnContextMenu' option is true.
+    let reset = cm.options.resetSelectionOnContextMenu
+    if (reset && cm.doc.sel.contains(pos) == -1)
+      operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll)
+
+    let oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText
+    let wrapperBox = input.wrapper.offsetParent.getBoundingClientRect()
+    input.wrapper.style.cssText = "position: static"
+    te.style.cssText = `position: absolute; width: 30px; height: 30px;
+      top: ${e.clientY - wrapperBox.top - 5}px; left: ${e.clientX - wrapperBox.left - 5}px;
+      z-index: 1000; background: ${ie ? "rgba(255, 255, 255, .05)" : "transparent"};
+      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);`
+    let oldScrollY
+    if (webkit) oldScrollY = te.ownerDocument.defaultView.scrollY // Work around Chrome issue (#2712)
+    display.input.focus()
+    if (webkit) te.ownerDocument.defaultView.scrollTo(null, oldScrollY)
+    display.input.reset()
+    // Adds "Select all" to context menu in FF
+    if (!cm.somethingSelected()) te.value = input.prevInput = " "
+    input.contextMenuPending = rehide
+    display.selForContextMenu = cm.doc.sel
+    clearTimeout(display.detectingSelectAll)
+
+    // Select-all will be greyed out if there's nothing to select, so
+    // this adds a zero-width space so that we can later check whether
+    // it got selected.
+    function prepareSelectAllHack() {
+      if (te.selectionStart != null) {
+        let selected = cm.somethingSelected()
+        let extval = "\u200b" + (selected ? te.value : "")
+        te.value = "\u21da" // Used to catch context-menu undo
+        te.value = extval
+        input.prevInput = selected ? "" : "\u200b"
+        te.selectionStart = 1; te.selectionEnd = extval.length
+        // Re-set this, in case some other handler touched the
+        // selection in the meantime.
+        display.selForContextMenu = cm.doc.sel
+      }
+    }
+    function rehide() {
+      if (input.contextMenuPending != rehide) return
+      input.contextMenuPending = false
+      input.wrapper.style.cssText = oldWrapperCSS
+      te.style.cssText = oldCSS
+      if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos)
+
+      // Try to detect the user choosing select-all
+      if (te.selectionStart != null) {
+        if (!ie || (ie && ie_version < 9)) prepareSelectAllHack()
+        let i = 0, poll = () => {
+          if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
+              te.selectionEnd > 0 && input.prevInput == "\u200b") {
+            operation(cm, selectAll)(cm)
+          } else if (i++ < 10) {
+            display.detectingSelectAll = setTimeout(poll, 500)
+          } else {
+            display.selForContextMenu = null
+            display.input.reset()
+          }
+        }
+        display.detectingSelectAll = setTimeout(poll, 200)
+      }
+    }
+
+    if (ie && ie_version >= 9) prepareSelectAllHack()
+    if (captureRightClick) {
+      e_stop(e)
+      let mouseup = () => {
+        off(window, "mouseup", mouseup)
+        setTimeout(rehide, 20)
+      }
+      on(window, "mouseup", mouseup)
+    } else {
+      setTimeout(rehide, 50)
+    }
+  }
+
+  readOnlyChanged(val) {
+    if (!val) this.reset()
+    this.textarea.disabled = val == "nocursor"
+    this.textarea.readOnly = !!val
+  }
+
+  setUneditable() {}
+}
+
+TextareaInput.prototype.needsContentAttribute = false

node_modules/codemirror/src/input/indent.js

@@ -0,0 +1,71 @@
+import { getContextBefore } from "../line/highlight.js"
+import { Pos } from "../line/pos.js"
+import { getLine } from "../line/utils_line.js"
+import { replaceRange } from "../model/changes.js"
+import { Range } from "../model/selection.js"
+import { replaceOneSelection } from "../model/selection_updates.js"
+import { countColumn, Pass, spaceStr } from "../util/misc.js"
+
+// Indent the given line. The how parameter can be "smart",
+// "add"/null, "subtract", or "prev". When aggressive is false
+// (typically set to true for forced single-line indents), empty
+// lines are not indented, and places where the mode returns Pass
+// are left alone.
+export function indentLine(cm, n, how, aggressive) {
+  let doc = cm.doc, state
+  if (how == null) how = "add"
+  if (how == "smart") {
+    // Fall back to "prev" when the mode doesn't have an indentation
+    // method.
+    if (!doc.mode.indent) how = "prev"
+    else state = getContextBefore(cm, n).state
+  }
+
+  let tabSize = cm.options.tabSize
+  let line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
+  if (line.stateAfter) line.stateAfter = null
+  let curSpaceString = line.text.match(/^\s*/)[0], indentation
+  if (!aggressive && !/\S/.test(line.text)) {
+    indentation = 0
+    how = "not"
+  } else if (how == "smart") {
+    indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
+    if (indentation == Pass || indentation > 150) {
+      if (!aggressive) return
+      how = "prev"
+    }
+  }
+  if (how == "prev") {
+    if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize)
+    else indentation = 0
+  } else if (how == "add") {
+    indentation = curSpace + cm.options.indentUnit
+  } else if (how == "subtract") {
+    indentation = curSpace - cm.options.indentUnit
+  } else if (typeof how == "number") {
+    indentation = curSpace + how
+  }
+  indentation = Math.max(0, indentation)
+
+  let indentString = "", pos = 0
+  if (cm.options.indentWithTabs)
+    for (let i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"}
+  if (pos < indentation) indentString += spaceStr(indentation - pos)
+
+  if (indentString != curSpaceString) {
+    replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
+    line.stateAfter = null
+    return true
+  } else {
+    // Ensure that, if the cursor was in the whitespace at the start
+    // of the line, it is moved to the end of that space.
+    for (let i = 0; i < doc.sel.ranges.length; i++) {
+      let range = doc.sel.ranges[i]
+      if (range.head.line == n && range.head.ch < curSpaceString.length) {
+        let pos = Pos(n, curSpaceString.length)
+        replaceOneSelection(doc, i, new Range(pos, pos))
+        break
+      }
+    }
+  }
+}

node_modules/codemirror/src/input/input.js

@@ -0,0 +1,134 @@
+import { runInOp } from "../display/operations.js"
+import { ensureCursorVisible } from "../display/scrolling.js"
+import { Pos } from "../line/pos.js"
+import { getLine } from "../line/utils_line.js"
+import { makeChange } from "../model/changes.js"
+import { ios, webkit } from "../util/browser.js"
+import { elt } from "../util/dom.js"
+import { lst, map } from "../util/misc.js"
+import { signalLater } from "../util/operation_group.js"
+import { splitLinesAuto } from "../util/feature_detection.js"
+
+import { indentLine } from "./indent.js"
+
+// This will be set to a {lineWise: bool, text: [string]} object, so
+// that, when pasting, we know what kind of selections the copied
+// text was made out of.
+export let lastCopied = null
+
+export function setLastCopied(newLastCopied) {
+  lastCopied = newLastCopied
+}
+
+export function applyTextInput(cm, inserted, deleted, sel, origin) {
+  let doc = cm.doc
+  cm.display.shift = false
+  if (!sel) sel = doc.sel
+
+  let recent = +new Date - 200
+  let paste = origin == "paste" || cm.state.pasteIncoming > recent
+  let textLines = splitLinesAuto(inserted), multiPaste = null
+  // When pasting N lines into N selections, insert one line per selection
+  if (paste && sel.ranges.length > 1) {
+    if (lastCopied && lastCopied.text.join("\n") == inserted) {
+      if (sel.ranges.length % lastCopied.text.length == 0) {
+        multiPaste = []
+        for (let i = 0; i < lastCopied.text.length; i++)
+          multiPaste.push(doc.splitLines(lastCopied.text[i]))
+      }
+    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
+      multiPaste = map(textLines, l => [l])
+    }
+  }
+
+  let updateInput = cm.curOp.updateInput
+  // Normal behavior is to insert the new text into every selection
+  for (let i = sel.ranges.length - 1; i >= 0; i--) {
+    let range = sel.ranges[i]
+    let from = range.from(), to = range.to()
+    if (range.empty()) {
+      if (deleted && deleted > 0) // Handle deletion
+        from = Pos(from.line, from.ch - deleted)
+      else if (cm.state.overwrite && !paste) // Handle overwrite
+        to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length))
+      else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == textLines.join("\n"))
+        from = to = Pos(from.line, 0)
+    }
+    let changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines,
+                       origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")}
+    makeChange(cm.doc, changeEvent)
+    signalLater(cm, "inputRead", cm, changeEvent)
+  }
+  if (inserted && !paste)
+    triggerElectric(cm, inserted)
+
+  ensureCursorVisible(cm)
+  if (cm.curOp.updateInput < 2) cm.curOp.updateInput = updateInput
+  cm.curOp.typing = true
+  cm.state.pasteIncoming = cm.state.cutIncoming = -1
+}
+
+export function handlePaste(e, cm) {
+  let pasted = e.clipboardData && e.clipboardData.getData("Text")
+  if (pasted) {
+    e.preventDefault()
+    if (!cm.isReadOnly() && !cm.options.disableInput && cm.hasFocus())
+      runInOp(cm, () => applyTextInput(cm, pasted, 0, null, "paste"))
+    return true
+  }
+}
+
+export function triggerElectric(cm, inserted) {
+  // When an 'electric' character is inserted, immediately trigger a reindent
+  if (!cm.options.electricChars || !cm.options.smartIndent) return
+  let sel = cm.doc.sel
+
+  for (let i = sel.ranges.length - 1; i >= 0; i--) {
+    let range = sel.ranges[i]
+    if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) continue
+    let mode = cm.getModeAt(range.head)
+    let indented = false
+    if (mode.electricChars) {
+      for (let j = 0; j < mode.electricChars.length; j++)
+        if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
+          indented = indentLine(cm, range.head.line, "smart")
+          break
+        }
+    } else if (mode.electricInput) {
+      if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
+        indented = indentLine(cm, range.head.line, "smart")
+    }
+    if (indented) signalLater(cm, "electricInput", cm, range.head.line)
+  }
+}
+
+export function copyableRanges(cm) {
+  let text = [], ranges = []
+  for (let i = 0; i < cm.doc.sel.ranges.length; i++) {
+    let line = cm.doc.sel.ranges[i].head.line
+    let lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
+    ranges.push(lineRange)
+    text.push(cm.getRange(lineRange.anchor, lineRange.head))
+  }
+  return {text: text, ranges: ranges}
+}
+
+export function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
+  field.setAttribute("autocorrect", autocorrect ? "on" : "off")
+  field.setAttribute("autocapitalize", autocapitalize ? "on" : "off")
+  field.setAttribute("spellcheck", !!spellcheck)
+}
+
+export function hiddenTextarea() {
+  let te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; min-height: 1em; outline: none")
+  let div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
+  // The textarea is kept positioned near the cursor to prevent the
+  // fact that it'll be scrolled into view on input from scrolling
+  // our fake cursor out of view. On webkit, when wrap=off, paste is
+  // very slow. So make the area wide instead.
+  if (webkit) te.style.width = "1000px"
+  else te.setAttribute("wrap", "off")
+  // If border: 0; -- iOS fails to open keyboard (issue #1287)
+  if (ios) te.style.border = "1px solid black"
+  return div
+}

node_modules/codemirror/src/input/keymap.js

@@ -0,0 +1,147 @@
+import { flipCtrlCmd, mac, presto } from "../util/browser.js"
+import { map } from "../util/misc.js"
+
+import { keyNames } from "./keynames.js"
+
+export let keyMap = {}
+
+keyMap.basic = {
+  "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
+  "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
+  "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
+  "Tab": "defaultTab", "Shift-Tab": "indentAuto",
+  "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
+  "Esc": "singleSelection"
+}
+// Note that the save and find-related commands aren't defined by
+// default. User code or addons can define them. Unknown commands
+// are simply ignored.
+keyMap.pcDefault = {
+  "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
+  "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
+  "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
+  "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
+  "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
+  "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
+  "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
+  "fallthrough": "basic"
+}
+// Very basic readline/emacs-style bindings, which are standard on Mac.
+keyMap.emacsy = {
+  "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
+  "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp",
+  "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine",
+  "Ctrl-T": "transposeChars", "Ctrl-O": "openLine"
+}
+keyMap.macDefault = {
+  "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+  "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+  "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
+  "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
+  "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
+  "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
+  "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
+  "fallthrough": ["basic", "emacsy"]
+}
+keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault
+
+// KEYMAP DISPATCH
+
+function normalizeKeyName(name) {
+  let parts = name.split(/-(?!$)/)
+  name = parts[parts.length - 1]
+  let alt, ctrl, shift, cmd
+  for (let i = 0; i < parts.length - 1; i++) {
+    let mod = parts[i]
+    if (/^(cmd|meta|m)$/i.test(mod)) cmd = true
+    else if (/^a(lt)?$/i.test(mod)) alt = true
+    else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true
+    else if (/^s(hift)?$/i.test(mod)) shift = true
+    else throw new Error("Unrecognized modifier name: " + mod)
+  }
+  if (alt) name = "Alt-" + name
+  if (ctrl) name = "Ctrl-" + name
+  if (cmd) name = "Cmd-" + name
+  if (shift) name = "Shift-" + name
+  return name
+}
+
+// This is a kludge to keep keymaps mostly working as raw objects
+// (backwards compatibility) while at the same time support features
+// like normalization and multi-stroke key bindings. It compiles a
+// new normalized keymap, and then updates the old object to reflect
+// this.
+export function normalizeKeyMap(keymap) {
+  let copy = {}
+  for (let keyname in keymap) if (keymap.hasOwnProperty(keyname)) {
+    let value = keymap[keyname]
+    if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue
+    if (value == "...") { delete keymap[keyname]; continue }
+
+    let keys = map(keyname.split(" "), normalizeKeyName)
+    for (let i = 0; i < keys.length; i++) {
+      let val, name
+      if (i == keys.length - 1) {
+        name = keys.join(" ")
+        val = value
+      } else {
+        name = keys.slice(0, i + 1).join(" ")
+        val = "..."
+      }
+      let prev = copy[name]
+      if (!prev) copy[name] = val
+      else if (prev != val) throw new Error("Inconsistent bindings for " + name)
+    }
+    delete keymap[keyname]
+  }
+  for (let prop in copy) keymap[prop] = copy[prop]
+  return keymap
+}
+
+export function lookupKey(key, map, handle, context) {
+  map = getKeyMap(map)
+  let found = map.call ? map.call(key, context) : map[key]
+  if (found === false) return "nothing"
+  if (found === "...") return "multi"
+  if (found != null && handle(found)) return "handled"
+
+  if (map.fallthrough) {
+    if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
+      return lookupKey(key, map.fallthrough, handle, context)
+    for (let i = 0; i < map.fallthrough.length; i++) {
+      let result = lookupKey(key, map.fallthrough[i], handle, context)
+      if (result) return result
+    }
+  }
+}
+
+// Modifier key presses don't count as 'real' key presses for the
+// purpose of keymap fallthrough.
+export function isModifierKey(value) {
+  let name = typeof value == "string" ? value : keyNames[value.keyCode]
+  return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
+}
+
+export function addModifierNames(name, event, noShift) {
+  let base = name
+  if (event.altKey && base != "Alt") name = "Alt-" + name
+  if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name
+  if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Mod") name = "Cmd-" + name
+  if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name
+  return name
+}
+
+// Look up the name of a key as indicated by an event object.
+export function keyName(event, noShift) {
+  if (presto && event.keyCode == 34 && event["char"]) return false
+  let name = keyNames[event.keyCode]
+  if (name == null || event.altGraphKey) return false
+  // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
+  // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
+  if (event.keyCode == 3 && event.code) name = event.code
+  return addModifierNames(name, event, noShift)
+}
+
+export function getKeyMap(val) {
+  return typeof val == "string" ? keyMap[val] : val
+}

node_modules/codemirror/src/input/keynames.js

@@ -0,0 +1,17 @@
+export let keyNames = {
+  3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
+  19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
+  36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
+  46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
+  106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
+  173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
+  221: "]", 222: "'", 224: "Mod", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+  63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
+}
+
+// Number keys
+for (let i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i)
+// Alphabetic keys
+for (let i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i)
+// Function keys
+for (let i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i

node_modules/codemirror/src/input/movement.js

@@ -0,0 +1,111 @@
+import { Pos } from "../line/pos.js"
+import { prepareMeasureForLine, measureCharPrepared, wrappedLineExtentChar } from "../measurement/position_measurement.js"
+import { getBidiPartAt, getOrder } from "../util/bidi.js"
+import { findFirst, lst, skipExtendingChars } from "../util/misc.js"
+
+function moveCharLogically(line, ch, dir) {
+  let target = skipExtendingChars(line.text, ch + dir, dir)
+  return target < 0 || target > line.text.length ? null : target
+}
+
+export function moveLogically(line, start, dir) {
+  let ch = moveCharLogically(line, start.ch, dir)
+  return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
+}
+
+export function endOfLine(visually, cm, lineObj, lineNo, dir) {
+  if (visually) {
+    if (cm.doc.direction == "rtl") dir = -dir
+    let order = getOrder(lineObj, cm.doc.direction)
+    if (order) {
+      let part = dir < 0 ? lst(order) : order[0]
+      let moveInStorageOrder = (dir < 0) == (part.level == 1)
+      let sticky = moveInStorageOrder ? "after" : "before"
+      let ch
+      // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
+      // it could be that the last bidi part is not on the last visual line,
+      // since visual lines contain content order-consecutive chunks.
+      // Thus, in rtl, we are looking for the first (content-order) character
+      // in the rtl chunk that is on the last line (that is, the same line
+      // as the last (content-order) character).
+      if (part.level > 0 || cm.doc.direction == "rtl") {
+        let prep = prepareMeasureForLine(cm, lineObj)
+        ch = dir < 0 ? lineObj.text.length - 1 : 0
+        let targetTop = measureCharPrepared(cm, prep, ch).top
+        ch = findFirst(ch => measureCharPrepared(cm, prep, ch).top == targetTop, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch)
+        if (sticky == "before") ch = moveCharLogically(lineObj, ch, 1)
+      } else ch = dir < 0 ? part.to : part.from
+      return new Pos(lineNo, ch, sticky)
+    }
+  }
+  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
+}
+
+export function moveVisually(cm, line, start, dir) {
+  let bidi = getOrder(line, cm.doc.direction)
+  if (!bidi) return moveLogically(line, start, dir)
+  if (start.ch >= line.text.length) {
+    start.ch = line.text.length
+    start.sticky = "before"
+  } else if (start.ch <= 0) {
+    start.ch = 0
+    start.sticky = "after"
+  }
+  let partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos]
+  if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
+    // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
+    // nothing interesting happens.
+    return moveLogically(line, start, dir)
+  }
+
+  let mv = (pos, dir) => moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir)
+  let prep
+  let getWrappedLineExtent = ch => {
+    if (!cm.options.lineWrapping) return {begin: 0, end: line.text.length}
+    prep = prep || prepareMeasureForLine(cm, line)
+    return wrappedLineExtentChar(cm, line, prep, ch)
+  }
+  let wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch)
+
+  if (cm.doc.direction == "rtl" || part.level == 1) {
+    let moveInStorageOrder = (part.level == 1) == (dir < 0)
+    let ch = mv(start, moveInStorageOrder ? 1 : -1)
+    if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
+      // Case 2: We move within an rtl part or in an rtl editor on the same visual line
+      let sticky = moveInStorageOrder ? "before" : "after"
+      return new Pos(start.line, ch, sticky)
+    }
+  }
+
+  // Case 3: Could not move within this bidi part in this visual line, so leave
+  // the current bidi part
+
+  let searchInVisualLine = (partPos, dir, wrappedLineExtent) => {
+    let getRes = (ch, moveInStorageOrder) => moveInStorageOrder
+      ? new Pos(start.line, mv(ch, 1), "before")
+      : new Pos(start.line, ch, "after")
+
+    for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
+      let part = bidi[partPos]
+      let moveInStorageOrder = (dir > 0) == (part.level != 1)
+      let ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1)
+      if (part.from <= ch && ch < part.to) return getRes(ch, moveInStorageOrder)
+      ch = moveInStorageOrder ? part.from : mv(part.to, -1)
+      if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) return getRes(ch, moveInStorageOrder)
+    }
+  }
+
+  // Case 3a: Look for other bidi parts on the same visual line
+  let res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent)
+  if (res) return res
+
+  // Case 3b: Look for other bidi parts on the next visual line
+  let nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1)
+  if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
+    res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh))
+    if (res) return res
+  }
+
+  // Case 4: Nowhere to move
+  return null
+}