save work

static/filemanager/src/input/TextareaInput.js

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+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)
+
+    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 = window.scrollY // Work around Chrome issue (#2712)
+    display.input.focus()
+    if (webkit) window.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