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