chrome-devtools-frontend
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Chrome DevTools UI
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JavaScript
/*
* Copyright (C) 2008 Apple Inc. All rights reserved.
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import * as Common from '../common/common.js';
import * as DOMExtension from '../dom_extension/dom_extension.js';
import * as Platform from '../platform/platform.js';
import * as TextUtils from '../text_utils/text_utils.js';
import * as ARIAUtils from './ARIAUtils.js';
import {SuggestBox, SuggestBoxDelegate, Suggestion, Suggestions} from './SuggestBox.js'; // eslint-disable-line no-unused-vars
import {Tooltip} from './Tooltip.js';
import {ElementFocusRestorer} from './UIUtils.js';
import {appendStyle} from './utils/append-style.js';
/**
* @implements {SuggestBoxDelegate}
*/
export class TextPrompt extends Common.ObjectWrapper.ObjectWrapper {
constructor() {
super();
/**
* @type {!HTMLElement|undefined}
*/
this._proxyElement;
this._proxyElementDisplay = 'inline-block';
this._autocompletionTimeout = DefaultAutocompletionTimeout;
this._title = '';
this._queryRange = null;
this._previousText = '';
this._currentSuggestion = null;
this._completionRequestId = 0;
this._ghostTextElement = document.createElement('span');
this._ghostTextElement.classList.add('auto-complete-text');
this._ghostTextElement.setAttribute('contenteditable', 'false');
/**
* @type {!Array<number>}
*/
this._leftParenthesesIndices = [];
ARIAUtils.markAsHidden(this._ghostTextElement);
/** @type {function(this:null, string, string, boolean=):!Promise<!Suggestions>} */
this._loadCompletions;
/** @type {string} */
this._completionStopCharacters;
/** @type {boolean} */
this._usesSuggestionBuilder;
}
/**
* @param {function(this:null, string, string, boolean=):!Promise<!Suggestions>} completions
* @param {string=} stopCharacters
* @param {boolean=} usesSuggestionBuilder
*/
initialize(completions, stopCharacters, usesSuggestionBuilder) {
this._loadCompletions = completions;
this._completionStopCharacters = stopCharacters || ' =:[({;,!+-*/&|^<>.';
this._usesSuggestionBuilder = usesSuggestionBuilder || false;
}
/**
* @param {number} timeout
*/
setAutocompletionTimeout(timeout) {
this._autocompletionTimeout = timeout;
}
renderAsBlock() {
this._proxyElementDisplay = 'block';
}
/**
* Clients should never attach any event listeners to the |element|. Instead,
* they should use the result of this method to attach listeners for bubbling events.
*
* @param {!Element} element
* @return {!Element}
*/
attach(element) {
return this._attachInternal(element);
}
/**
* Clients should never attach any event listeners to the |element|. Instead,
* they should use the result of this method to attach listeners for bubbling events
* or the |blurListener| parameter to register a "blur" event listener on the |element|
* (since the "blur" event does not bubble.)
*
* @param {!Element} element
* @param {function(!Event):*} blurListener
* @return {!Element}
*/
attachAndStartEditing(element, blurListener) {
const proxyElement = this._attachInternal(element);
this._startEditing(blurListener);
return proxyElement;
}
/**
* @param {!Element} element
* @return {!Element}
*/
_attachInternal(element) {
if (this._proxyElement) {
throw 'Cannot attach an attached TextPrompt';
}
this._element = element;
this._boundOnKeyDown = this.onKeyDown.bind(this);
this._boundOnInput = this.onInput.bind(this);
this._boundOnMouseWheel = this.onMouseWheel.bind(this);
this._boundClearAutocomplete = this.clearAutocomplete.bind(this);
this._proxyElement = /** @type {!HTMLElement} */ (element.ownerDocument.createElement('span'));
appendStyle(this._proxyElement, 'ui/textPrompt.css', {enableLegacyPatching: false});
this._contentElement = this._proxyElement.createChild('div', 'text-prompt-root');
this._proxyElement.style.display = this._proxyElementDisplay;
if (element.parentElement) {
element.parentElement.insertBefore(this._proxyElement, element);
}
this._contentElement.appendChild(element);
this._element.classList.add('text-prompt');
ARIAUtils.markAsTextBox(this._element);
this._element.setAttribute('contenteditable', 'plaintext-only');
this.element().addEventListener('keydown', this._boundOnKeyDown, false);
this._element.addEventListener('input', this._boundOnInput, false);
this._element.addEventListener('wheel', this._boundOnMouseWheel, false);
this._element.addEventListener('selectstart', this._boundClearAutocomplete, false);
this._element.addEventListener('blur', this._boundClearAutocomplete, false);
this._suggestBox = new SuggestBox(this, 20);
if (this._title) {
Tooltip.install(this._proxyElement, this._title);
}
return this._proxyElement;
}
/**
* @private
* @return {!HTMLElement}
*/
element() {
if (!this._element) {
throw new Error('Expected an already attached element!');
}
return /** @type {!HTMLElement} */ (this._element);
}
detach() {
this._removeFromElement();
if (this._focusRestorer) {
this._focusRestorer.restore();
}
if (this._proxyElement && this._proxyElement.parentElement) {
this._proxyElement.parentElement.insertBefore(this.element(), this._proxyElement);
this._proxyElement.remove();
}
delete this._proxyElement;
this.element().classList.remove('text-prompt');
this.element().removeAttribute('contenteditable');
this.element().removeAttribute('role');
}
/**
* @return {string}
*/
textWithCurrentSuggestion() {
const text = this.text();
if (!this._queryRange || !this._currentSuggestion) {
return text;
}
const suggestion = this._currentSuggestion.text;
return text.substring(0, this._queryRange.startColumn) + suggestion + text.substring(this._queryRange.endColumn);
}
/**
* @return {string}
*/
text() {
let text = this.element().textContent || '';
if (this._ghostTextElement.parentNode) {
const addition = this._ghostTextElement.textContent || '';
text = text.substring(0, text.length - addition.length);
}
return text;
}
/**
* @param {string} text
*/
setText(text) {
this.clearAutocomplete();
this.element().textContent = text;
this._previousText = this.text();
if (this.element().hasFocus()) {
this.moveCaretToEndOfPrompt();
this.element().scrollIntoView();
}
}
/**
* @param {number} startIndex
* @param {number} endIndex
*/
setSelectedRange(startIndex, endIndex) {
if (startIndex < 0) {
throw new RangeError('Selected range start must be a nonnegative integer');
}
const textContent = this.element().textContent;
const textContentLength = textContent ? textContent.length : 0;
if (endIndex > textContentLength) {
endIndex = textContentLength;
}
if (endIndex < startIndex) {
endIndex = startIndex;
}
const textNode = /** @type {!Node} */ (this.element().childNodes[0]);
const range = new Range();
range.setStart(textNode, startIndex);
range.setEnd(textNode, endIndex);
const selection = window.getSelection();
if (selection) {
selection.removeAllRanges();
selection.addRange(range);
}
}
focus() {
this.element().focus();
}
/**
* @return {string}
*/
title() {
return this._title;
}
/**
* @param {string} title
*/
setTitle(title) {
this._title = title;
if (this._proxyElement) {
Tooltip.install(this._proxyElement, title);
}
}
/**
* @param {string} placeholder
* @param {string=} ariaPlaceholder
*/
setPlaceholder(placeholder, ariaPlaceholder) {
if (placeholder) {
this.element().setAttribute('data-placeholder', placeholder);
// TODO(https://github.com/nvaccess/nvda/issues/10164): Remove ariaPlaceholder once the NVDA bug is fixed
// ariaPlaceholder and placeholder may differ, like in case the placeholder contains a '?'
ARIAUtils.setPlaceholder(this.element(), ariaPlaceholder || placeholder);
} else {
this.element().removeAttribute('data-placeholder');
ARIAUtils.setPlaceholder(this.element(), null);
}
}
/**
* @param {boolean} enabled
*/
setEnabled(enabled) {
if (enabled) {
this.element().setAttribute('contenteditable', 'plaintext-only');
} else {
this.element().removeAttribute('contenteditable');
}
this.element().classList.toggle('disabled', !enabled);
}
_removeFromElement() {
this.clearAutocomplete();
this.element().removeEventListener(
'keydown', /** @type {function(this:HTMLElement, !Event):void} */ (this._boundOnKeyDown), false);
this.element().removeEventListener(
'input', /** @type {function(this:HTMLElement, !Event):void} */ (this._boundOnInput), false);
this.element().removeEventListener(
'selectstart', /** @type {function(this:HTMLElement, !Event):void} */ (this._boundClearAutocomplete), false);
this.element().removeEventListener(
'blur', /** @type {function(this:HTMLElement, !Event):void} */ (this._boundClearAutocomplete), false);
if (this._isEditing) {
this._stopEditing();
}
if (this._suggestBox) {
this._suggestBox.hide();
}
}
/**
* @param {function(!Event):*=} blurListener
*/
_startEditing(blurListener) {
this._isEditing = true;
if (this._contentElement) {
this._contentElement.classList.add('text-prompt-editing');
}
this._focusRestorer = new ElementFocusRestorer(this.element());
if (blurListener) {
this._blurListener = blurListener;
this.element().addEventListener('blur', this._blurListener, false);
}
this._oldTabIndex = this.element().tabIndex;
if (this.element().tabIndex < 0) {
this.element().tabIndex = 0;
}
if (!this.text()) {
this.autoCompleteSoon();
}
}
_stopEditing() {
this.element().tabIndex = /** @type {number} */ (this._oldTabIndex);
if (this._blurListener) {
this.element().removeEventListener('blur', this._blurListener, false);
}
if (this._contentElement) {
this._contentElement.classList.remove('text-prompt-editing');
}
delete this._isEditing;
}
/**
* @param {!Event} event
*/
onMouseWheel(event) {
// Subclasses can implement.
}
/**
* @param {!Event} ev
*/
onKeyDown(ev) {
let handled = false;
const event = /** @type {!KeyboardEvent} */ (ev);
if (this.isSuggestBoxVisible() && this._suggestBox && this._suggestBox.keyPressed(event)) {
event.consume(true);
return;
}
switch (event.key) {
case 'Tab':
handled = this.tabKeyPressed(event);
break;
case 'ArrowLeft':
case 'ArrowUp':
case 'PageUp':
case 'Home':
this.clearAutocomplete();
break;
case 'PageDown':
case 'ArrowRight':
case 'ArrowDown':
case 'End':
if (this._isCaretAtEndOfPrompt()) {
handled = this.acceptAutoComplete();
} else {
this.clearAutocomplete();
}
break;
case 'Escape':
if (this.isSuggestBoxVisible()) {
this.clearAutocomplete();
handled = true;
}
break;
case ' ': // Space
if (event.ctrlKey && !event.metaKey && !event.altKey && !event.shiftKey) {
this.autoCompleteSoon(true);
handled = true;
}
break;
}
if (event.key === 'Enter') {
event.preventDefault();
}
if (handled) {
event.consume(true);
}
}
/**
* @param {string} key
* @return {boolean}
*/
_acceptSuggestionOnStopCharacters(key) {
if (!this._currentSuggestion || !this._queryRange || key.length !== 1 || !this._completionStopCharacters ||
!this._completionStopCharacters.includes(key)) {
return false;
}
const query = this.text().substring(this._queryRange.startColumn, this._queryRange.endColumn);
if (query && this._currentSuggestion.text.startsWith(query + key)) {
this._queryRange.endColumn += 1;
return this.acceptAutoComplete();
}
return false;
}
/**
* @param {!Event} ev
*/
onInput(ev) {
const event = /** @type {!InputEvent} */ (ev);
let text = this.text();
const currentEntry = event.data;
if (event.inputType === 'insertFromPaste' && text.includes('\n')) {
/* Ensure that we remove any linebreaks from copied/pasted content
* to avoid breaking the rendering of the filter bar.
* See crbug.com/849563.
* We don't let users enter linebreaks when
* typing manually, so we should escape them if copying text in.
*/
text = Platform.StringUtilities.stripLineBreaks(text);
this.setText(text);
}
// Skip the current ')' entry if the caret is right before a ')' and there's an unmatched '('.
const caretPosition = this._getCaretPosition();
if (currentEntry === ')' && caretPosition >= 0 && this._leftParenthesesIndices.length > 0) {
const nextCharAtCaret = text[caretPosition];
if (nextCharAtCaret === ')' && this._tryMatchingLeftParenthesis(caretPosition)) {
text = text.substring(0, caretPosition) + text.substring(caretPosition + 1);
this.setText(text);
return;
}
}
if (currentEntry && !this._acceptSuggestionOnStopCharacters(currentEntry)) {
const hasCommonPrefix = text.startsWith(this._previousText) || this._previousText.startsWith(text);
if (this._queryRange && hasCommonPrefix) {
this._queryRange.endColumn += text.length - this._previousText.length;
}
}
this._refreshGhostText();
this._previousText = text;
this.dispatchEventToListeners(Events.TextChanged);
this.autoCompleteSoon();
}
/**
* @return {boolean}
*/
acceptAutoComplete() {
let result = false;
if (this.isSuggestBoxVisible() && this._suggestBox) {
result = this._suggestBox.acceptSuggestion();
}
if (!result) {
result = this._acceptSuggestionInternal();
}
if (this._usesSuggestionBuilder && result) {
// Trigger autocompletions for text prompts using suggestion builders
this.autoCompleteSoon();
}
return result;
}
clearAutocomplete() {
const beforeText = this.textWithCurrentSuggestion();
if (this.isSuggestBoxVisible() && this._suggestBox) {
this._suggestBox.hide();
}
this._clearAutocompleteTimeout();
this._queryRange = null;
this._refreshGhostText();
if (beforeText !== this.textWithCurrentSuggestion()) {
this.dispatchEventToListeners(Events.TextChanged);
}
}
_refreshGhostText() {
if (this._currentSuggestion && this._currentSuggestion.hideGhostText) {
this._ghostTextElement.remove();
return;
}
if (this._queryRange && this._currentSuggestion && this._isCaretAtEndOfPrompt() &&
this._currentSuggestion.text.startsWith(this.text().substring(this._queryRange.startColumn))) {
this._ghostTextElement.textContent =
this._currentSuggestion.text.substring(this._queryRange.endColumn - this._queryRange.startColumn);
this.element().appendChild(this._ghostTextElement);
} else {
this._ghostTextElement.remove();
}
}
_clearAutocompleteTimeout() {
if (this._completeTimeout) {
clearTimeout(this._completeTimeout);
delete this._completeTimeout;
}
this._completionRequestId++;
}
/**
* @param {boolean=} force
*/
autoCompleteSoon(force) {
const immediately = this.isSuggestBoxVisible() || force;
if (!this._completeTimeout) {
this._completeTimeout =
setTimeout(this.complete.bind(this, force), immediately ? 0 : this._autocompletionTimeout);
}
}
/**
* @param {boolean=} force
*/
async complete(force) {
this._clearAutocompleteTimeout();
const selection = this.element().getComponentSelection();
if (!selection || selection.rangeCount === 0) {
return;
}
const selectionRange = selection.getRangeAt(0);
let shouldExit;
if (!force && !this._isCaretAtEndOfPrompt() && !this.isSuggestBoxVisible()) {
shouldExit = true;
} else if (!selection.isCollapsed) {
shouldExit = true;
}
if (shouldExit) {
this.clearAutocomplete();
return;
}
const wordQueryRange = DOMExtension.DOMExtension.rangeOfWord(
selectionRange.startContainer, selectionRange.startOffset, this._completionStopCharacters, this.element(),
'backward');
const expressionRange = wordQueryRange.cloneRange();
expressionRange.collapse(true);
expressionRange.setStartBefore(this.element());
const completionRequestId = ++this._completionRequestId;
const completions =
await this._loadCompletions.call(null, expressionRange.toString(), wordQueryRange.toString(), Boolean(force));
this._completionsReady(
completionRequestId, /** @type {!Selection} */ (selection), wordQueryRange, Boolean(force), completions);
}
disableDefaultSuggestionForEmptyInput() {
this._disableDefaultSuggestionForEmptyInput = true;
}
/**
* @param {!Selection} selection
* @param {!Range} textRange
*/
_boxForAnchorAtStart(selection, textRange) {
const rangeCopy = selection.getRangeAt(0).cloneRange();
const anchorElement = document.createElement('span');
anchorElement.textContent = '\u200B';
textRange.insertNode(anchorElement);
const box = anchorElement.boxInWindow(window);
anchorElement.remove();
selection.removeAllRanges();
selection.addRange(rangeCopy);
return box;
}
/**
* @param {string} query
* @return {!Suggestions}
*/
additionalCompletions(query) {
return [];
}
/**
* @param {number} completionRequestId
* @param {!Selection} selection
* @param {!Range} originalWordQueryRange
* @param {boolean} force
* @param {!Suggestions} completions
*/
_completionsReady(completionRequestId, selection, originalWordQueryRange, force, completions) {
if (this._completionRequestId !== completionRequestId) {
return;
}
const query = originalWordQueryRange.toString();
// Filter out dupes.
const store = new Set();
completions = completions.filter(item => !store.has(item.text) && Boolean(store.add(item.text)));
if (query || force) {
if (query) {
completions = completions.concat(this.additionalCompletions(query));
} else {
completions = this.additionalCompletions(query).concat(completions);
}
}
if (!completions.length) {
this.clearAutocomplete();
return;
}
const selectionRange = selection.getRangeAt(0);
const fullWordRange = document.createRange();
fullWordRange.setStart(originalWordQueryRange.startContainer, originalWordQueryRange.startOffset);
fullWordRange.setEnd(selectionRange.endContainer, selectionRange.endOffset);
if (query + selectionRange.toString() !== fullWordRange.toString()) {
return;
}
const beforeRange = document.createRange();
beforeRange.setStart(this.element(), 0);
beforeRange.setEnd(fullWordRange.startContainer, fullWordRange.startOffset);
this._queryRange = new TextUtils.TextRange.TextRange(
0, beforeRange.toString().length, 0, beforeRange.toString().length + fullWordRange.toString().length);
const shouldSelect = !this._disableDefaultSuggestionForEmptyInput || Boolean(this.text());
if (this._suggestBox) {
this._suggestBox.updateSuggestions(
this._boxForAnchorAtStart(selection, fullWordRange), completions, shouldSelect, !this._isCaretAtEndOfPrompt(),
this.text());
}
}
/**
* @override
* @param {?Suggestion} suggestion
* @param {boolean=} isIntermediateSuggestion
*/
applySuggestion(suggestion, isIntermediateSuggestion) {
this._currentSuggestion = suggestion;
this._refreshGhostText();
if (isIntermediateSuggestion) {
this.dispatchEventToListeners(Events.TextChanged);
}
}
/**
* @override
*/
acceptSuggestion() {
this._acceptSuggestionInternal();
}
/**
* @return {boolean}
*/
_acceptSuggestionInternal() {
if (!this._queryRange) {
return false;
}
const suggestionLength = this._currentSuggestion ? this._currentSuggestion.text.length : 0;
const selectionRange = this._currentSuggestion ? this._currentSuggestion.selectionRange : null;
const endColumn = selectionRange ? selectionRange.endColumn : suggestionLength;
const startColumn = selectionRange ? selectionRange.startColumn : suggestionLength;
this.element().textContent = this.textWithCurrentSuggestion();
this.setDOMSelection(this._queryRange.startColumn + startColumn, this._queryRange.startColumn + endColumn);
this._updateLeftParenthesesIndices();
this.clearAutocomplete();
this.dispatchEventToListeners(Events.TextChanged);
return true;
}
/**
* @param {number} startColumn
* @param {number} endColumn
*/
setDOMSelection(startColumn, endColumn) {
this.element().normalize();
const node = this.element().childNodes[0];
if (!node || node === this._ghostTextElement) {
return;
}
const range = document.createRange();
range.setStart(node, startColumn);
range.setEnd(node, endColumn);
const selection = this.element().getComponentSelection();
if (selection) {
selection.removeAllRanges();
selection.addRange(range);
}
}
/**
* @protected
* @return {boolean}
*/
isSuggestBoxVisible() {
return this._suggestBox !== undefined && this._suggestBox.visible();
}
/**
* @return {boolean}
*/
isCaretInsidePrompt() {
const selection = this.element().getComponentSelection();
if (!selection || selection.rangeCount === 0 || !selection.isCollapsed) {
return false;
}
// @see crbug.com/602541
const selectionRange = selection.getRangeAt(0);
return selectionRange.startContainer.isSelfOrDescendant(this.element());
}
/**
* @return {boolean}
*/
_isCaretAtEndOfPrompt() {
const selection = this.element().getComponentSelection();
if (!selection || selection.rangeCount === 0 || !selection.isCollapsed) {
return false;
}
const selectionRange = selection.getRangeAt(0);
/** @type {?Node} */
let node = selectionRange.startContainer;
if (!node.isSelfOrDescendant(this.element())) {
return false;
}
if (this._ghostTextElement.isAncestor(node)) {
return true;
}
if (node.nodeType === Node.TEXT_NODE && selectionRange.startOffset < (node.nodeValue || '').length) {
return false;
}
let foundNextText = false;
while (node) {
if (node.nodeType === Node.TEXT_NODE && node.nodeValue && node.nodeValue.length) {
if (foundNextText && !this._ghostTextElement.isAncestor(node)) {
return false;
}
foundNextText = true;
}
node = node.traverseNextNode(this._element);
}
return true;
}
moveCaretToEndOfPrompt() {
const selection = this.element().getComponentSelection();
const selectionRange = document.createRange();
/** @type {!Node} */
let container = this.element();
while (container.lastChild) {
container = container.lastChild;
}
let offset = 0;
if (container.nodeType === Node.TEXT_NODE) {
const textNode = /** @type {!Text} */ (container);
offset = (textNode.textContent || '').length;
}
selectionRange.setStart(container, offset);
selectionRange.setEnd(container, offset);
if (selection) {
selection.removeAllRanges();
selection.addRange(selectionRange);
}
}
/**
* @return {number} -1 if no caret can be found in text prompt
*/
_getCaretPosition() {
if (!this.element().hasFocus()) {
return -1;
}
const selection = this.element().getComponentSelection();
if (!selection || selection.rangeCount === 0 || !selection.isCollapsed) {
return -1;
}
const selectionRange = selection.getRangeAt(0);
if (selectionRange.startOffset !== selectionRange.endOffset) {
return -1;
}
return selectionRange.startOffset;
}
/**
* @param {!Event} event
* @return {boolean}
*/
tabKeyPressed(event) {
return this.acceptAutoComplete();
}
/**
* @return {?Element}
*/
proxyElementForTests() {
return this._proxyElement || null;
}
/**
* Try matching the most recent open parenthesis with the given right
* parenthesis, and closes the matched left parenthesis if found.
* Return the result of the matching.
* @param {number} rightParenthesisIndex
* @return {boolean}
*/
_tryMatchingLeftParenthesis(rightParenthesisIndex) {
const leftParenthesesIndices = this._leftParenthesesIndices;
if (leftParenthesesIndices.length === 0 || rightParenthesisIndex < 0) {
return false;
}
for (let i = leftParenthesesIndices.length - 1; i >= 0; --i) {
if (leftParenthesesIndices[i] < rightParenthesisIndex) {
leftParenthesesIndices.splice(i, 1);
return true;
}
}
return false;
}
_updateLeftParenthesesIndices() {
const text = this.text();
/** @type {!Array<number>} */
const leftParenthesesIndices = this._leftParenthesesIndices = [];
for (let i = 0; i < text.length; ++i) {
if (text[i] === '(') {
leftParenthesesIndices.push(i);
}
}
}
}
const DefaultAutocompletionTimeout = 250;
/** @enum {symbol} */
export const Events = {
TextChanged: Symbol('TextChanged')
};