FM / input

/usr/share/nodejs/codemirror/src/input

Name	Size	Mode	Actions
ContentEditableInput.js	19337	0644	edit dl rm
indent.js	2757	0644	edit dl rm
input.js	5548	0644	edit dl rm
keymap.js	6512	0644	edit dl rm
keynames.js	1014	0644	edit dl rm
movement.js	5090	0644	edit dl rm
TextareaInput.js	13921	0644	edit dl rm

Edit: /usr/share/nodejs/codemirror/src/input/TextareaInput.js (13921B)

import { operation, runInOp } from "../display/operations.js"
import { prepareSelection } from "../display/selection.js"
import { applyTextInput, copyableRanges, handlePaste, hiddenTextarea, 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 } 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
  }

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
  }

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) return
    let cm = this.cm
    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
    }
  }

getField() { return this.textarea }

supportsTouch() { return false }

focus() {
    if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != 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 || !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)

// 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

cmd: