Daniel Imms
bfa7a2df76
This also fine tunes some of the data events to not clear selection and scroll to the bottom of the viewport anymore. Part of #1507 Fixes #2112
1946 lines
65 KiB
TypeScript
1946 lines
65 KiB
TypeScript
/**
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* Copyright (c) 2014 The xterm.js authors. All rights reserved.
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* Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)
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* @license MIT
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*
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* Originally forked from (with the author's permission):
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* Fabrice Bellard's javascript vt100 for jslinux:
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* http://bellard.org/jslinux/
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* Copyright (c) 2011 Fabrice Bellard
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* The original design remains. The terminal itself
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* has been extended to include xterm CSI codes, among
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* other features.
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*
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* Terminal Emulation References:
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* http://vt100.net/
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* http://invisible-island.net/xterm/ctlseqs/ctlseqs.txt
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* http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
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* http://invisible-island.net/vttest/
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* http://www.inwap.com/pdp10/ansicode.txt
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* http://linux.die.net/man/4/console_codes
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* http://linux.die.net/man/7/urxvt
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*/
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import { IInputHandlingTerminal, IViewport, ICompositionHelper, ITerminalOptions, ITerminal, IBrowser, ILinkifier, ILinkMatcherOptions, CustomKeyEventHandler, LinkMatcherHandler, IMouseZoneManager } from './Types';
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import { IRenderer, CharacterJoinerHandler } from 'browser/renderer/Types';
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import { CompositionHelper } from './CompositionHelper';
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import { Viewport } from './Viewport';
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import { rightClickHandler, moveTextAreaUnderMouseCursor, pasteHandler, copyHandler } from './Clipboard';
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import { C0 } from 'common/data/EscapeSequences';
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import { InputHandler } from './InputHandler';
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import { Renderer } from './renderer/Renderer';
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import { Linkifier } from './Linkifier';
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import { SelectionManager } from './SelectionManager';
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import * as Browser from 'common/Platform';
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import { addDisposableDomListener } from 'browser/Lifecycle';
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import * as Strings from './browser/LocalizableStrings';
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import { SoundManager } from './SoundManager';
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import { MouseZoneManager } from './MouseZoneManager';
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import { AccessibilityManager } from './AccessibilityManager';
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import { ITheme, IMarker, IDisposable, ISelectionPosition } from 'xterm';
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import { removeTerminalFromCache } from './renderer/atlas/CharAtlasCache';
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import { DomRenderer } from './renderer/dom/DomRenderer';
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import { IKeyboardEvent, KeyboardResultType, ICharset, IBufferLine, IAttributeData } from 'common/Types';
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import { evaluateKeyboardEvent } from 'common/input/Keyboard';
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import { EventEmitter, IEvent } from 'common/EventEmitter';
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import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
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import { applyWindowsMode } from './WindowsMode';
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import { ColorManager } from 'browser/ColorManager';
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import { RenderService } from 'browser/services/RenderService';
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import { IOptionsService, IBufferService, ICoreService } from 'common/services/Services';
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import { OptionsService } from 'common/services/OptionsService';
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import { ICharSizeService, IRenderService, IMouseService } from 'browser/services/Services';
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import { CharSizeService } from 'browser/services/CharSizeService';
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import { BufferService, MINIMUM_COLS, MINIMUM_ROWS } from 'common/services/BufferService';
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import { Disposable } from 'common/Lifecycle';
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import { IBufferSet, IBuffer } from 'common/buffer/Types';
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import { Attributes } from 'common/buffer/Constants';
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import { MouseService } from 'browser/services/MouseService';
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import { CoreService } from 'common/services/CoreService';
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// Let it work inside Node.js for automated testing purposes.
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const document = (typeof window !== 'undefined') ? window.document : null;
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/**
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* The amount of write requests to queue before sending an XOFF signal to the
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* pty process. This number must be small in order for ^C and similar sequences
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* to be responsive.
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*/
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const WRITE_BUFFER_PAUSE_THRESHOLD = 5;
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/**
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* The max number of ms to spend on writes before allowing the renderer to
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* catch up with a 0ms setTimeout. A value of < 33 to keep us close to
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* 30fps, and a value of < 16 to try to run at 60fps. Of course, the real FPS
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* depends on the time it takes for the renderer to draw the frame.
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*/
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const WRITE_TIMEOUT_MS = 12;
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const WRITE_BUFFER_LENGTH_THRESHOLD = 50;
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export class Terminal extends Disposable implements ITerminal, IDisposable, IInputHandlingTerminal {
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public textarea: HTMLTextAreaElement;
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public element: HTMLElement;
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public screenElement: HTMLElement;
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/**
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* The HTMLElement that the terminal is created in, set by Terminal.open.
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*/
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private _parent: HTMLElement;
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private _context: Window;
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private _document: Document;
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private _viewportScrollArea: HTMLElement;
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private _viewportElement: HTMLElement;
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private _helperContainer: HTMLElement;
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private _compositionView: HTMLElement;
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private _visualBellTimer: number;
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public browser: IBrowser = <any>Browser;
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// TODO: We should remove options once components adopt optionsService
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public get options(): ITerminalOptions { return this.optionsService.options; }
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// TODO: This can be changed to an enum or boolean, 0 and 1 seem to be the only options
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public cursorState: number;
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public cursorHidden: boolean;
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private _customKeyEventHandler: CustomKeyEventHandler;
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// common services
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private _bufferService: IBufferService;
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private _coreService: ICoreService;
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public optionsService: IOptionsService;
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// browser services
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private _charSizeService: ICharSizeService;
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private _renderService: IRenderService;
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private _mouseService: IMouseService;
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// modes
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public applicationKeypad: boolean;
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public applicationCursor: boolean;
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public originMode: boolean;
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public insertMode: boolean;
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public wraparoundMode: boolean; // defaults: xterm - true, vt100 - false
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public bracketedPasteMode: boolean;
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// charset
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// The current charset
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public charset: ICharset;
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public gcharset: number;
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public glevel: number;
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public charsets: ICharset[];
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// mouse properties
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private _decLocator: boolean; // This is unstable and never set
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public x10Mouse: boolean;
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public vt200Mouse: boolean;
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private _vt300Mouse: boolean; // This is unstable and never set
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public normalMouse: boolean;
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public mouseEvents: boolean;
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public sendFocus: boolean;
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public utfMouse: boolean;
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public sgrMouse: boolean;
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public urxvtMouse: boolean;
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// misc
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private _refreshStart: number;
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private _refreshEnd: number;
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public savedCols: number;
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public curAttrData: IAttributeData;
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private _eraseAttrData: IAttributeData;
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public params: (string | number)[];
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public currentParam: string | number;
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// user input states
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public writeBuffer: string[];
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public writeBufferUtf8: Uint8Array[];
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private _writeInProgress: boolean;
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/**
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* Whether _xterm.js_ sent XOFF in order to catch up with the pty process.
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* This is a distinct state from writeStopped so that if the user requested
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* XOFF via ^S that it will not automatically resume when the writeBuffer goes
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* below threshold.
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*/
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private _xoffSentToCatchUp: boolean;
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/** Whether writing has been stopped as a result of XOFF */
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// private _writeStopped: boolean;
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// Store if user went browsing history in scrollback
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private _userScrolling: boolean;
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private _inputHandler: InputHandler;
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public soundManager: SoundManager;
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public selectionManager: SelectionManager;
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public linkifier: ILinkifier;
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public viewport: IViewport;
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private _compositionHelper: ICompositionHelper;
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private _mouseZoneManager: IMouseZoneManager;
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private _accessibilityManager: AccessibilityManager;
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private _colorManager: ColorManager;
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private _theme: ITheme;
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private _windowsMode: IDisposable | undefined;
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// bufferline to clone/copy from for new blank lines
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private _blankLine: IBufferLine = null;
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public get cols(): number { return this._bufferService.cols; }
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public get rows(): number { return this._bufferService.rows; }
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private _onCursorMove = new EventEmitter<void>();
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public get onCursorMove(): IEvent<void> { return this._onCursorMove.event; }
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private _onData = new EventEmitter<string>();
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public get onData(): IEvent<string> { return this._onData.event; }
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private _onKey = new EventEmitter<{ key: string, domEvent: KeyboardEvent }>();
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public get onKey(): IEvent<{ key: string, domEvent: KeyboardEvent }> { return this._onKey.event; }
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private _onLineFeed = new EventEmitter<void>();
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public get onLineFeed(): IEvent<void> { return this._onLineFeed.event; }
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private _onRender = new EventEmitter<{ start: number, end: number }>();
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public get onRender(): IEvent<{ start: number, end: number }> { return this._onRender.event; }
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private _onResize = new EventEmitter<{ cols: number, rows: number }>();
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public get onResize(): IEvent<{ cols: number, rows: number }> { return this._onResize.event; }
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private _onScroll = new EventEmitter<number>();
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public get onScroll(): IEvent<number> { return this._onScroll.event; }
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private _onSelectionChange = new EventEmitter<void>();
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public get onSelectionChange(): IEvent<void> { return this._onSelectionChange.event; }
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private _onTitleChange = new EventEmitter<string>();
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public get onTitleChange(): IEvent<string> { return this._onTitleChange.event; }
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private _onFocus = new EventEmitter<void>();
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public get onFocus(): IEvent<void> { return this._onFocus.event; }
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private _onBlur = new EventEmitter<void>();
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public get onBlur(): IEvent<void> { return this._onBlur.event; }
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public onA11yCharEmitter = new EventEmitter<string>();
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public get onA11yChar(): IEvent<string> { return this.onA11yCharEmitter.event; }
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public onA11yTabEmitter = new EventEmitter<number>();
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public get onA11yTab(): IEvent<number> { return this.onA11yTabEmitter.event; }
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/**
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* Creates a new `Terminal` object.
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*
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* @param options An object containing a set of options, the available options are:
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* - `cursorBlink` (boolean): Whether the terminal cursor blinks
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* - `cols` (number): The number of columns of the terminal (horizontal size)
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* - `rows` (number): The number of rows of the terminal (vertical size)
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*
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* @public
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* @class Xterm Xterm
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* @alias module:xterm/src/xterm
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*/
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constructor(
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options: ITerminalOptions = {}
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) {
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super();
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// Setup and initialize common services
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this.optionsService = new OptionsService(options);
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this._bufferService = new BufferService(this.optionsService);
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this._coreService = new CoreService(() => this.scrollToBottom(), this._bufferService, this.optionsService);
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this._coreService.onData(e => this._onData.fire(e));
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this._setupOptionsListeners();
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this._setup();
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}
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public dispose(): void {
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super.dispose();
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if (this._windowsMode) {
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this._windowsMode.dispose();
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this._windowsMode = undefined;
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}
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this._customKeyEventHandler = null;
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removeTerminalFromCache(this);
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this.write = () => {};
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if (this.element && this.element.parentNode) {
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this.element.parentNode.removeChild(this.element);
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}
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}
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private _setup(): void {
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this._parent = document ? document.body : null;
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this.cursorState = 0;
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this.cursorHidden = false;
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this._customKeyEventHandler = null;
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// modes
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this.applicationKeypad = false;
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this.applicationCursor = false;
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this.originMode = false;
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this.insertMode = false;
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this.wraparoundMode = true; // defaults: xterm - true, vt100 - false
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this.bracketedPasteMode = false;
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// charset
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this.charset = null;
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this.gcharset = null;
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this.glevel = 0;
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// TODO: Can this be just []?
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this.charsets = [null];
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this.curAttrData = DEFAULT_ATTR_DATA.clone();
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this._eraseAttrData = DEFAULT_ATTR_DATA.clone();
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this.params = [];
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this.currentParam = 0;
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// user input states
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this.writeBuffer = [];
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this.writeBufferUtf8 = [];
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this._writeInProgress = false;
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this._xoffSentToCatchUp = false;
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// this._writeStopped = false;
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this._userScrolling = false;
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// Register input handler and refire/handle events
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this._inputHandler = new InputHandler(this, this._coreService);
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this._inputHandler.onCursorMove(() => this._onCursorMove.fire());
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this._inputHandler.onLineFeed(() => this._onLineFeed.fire());
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this.register(this._inputHandler);
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this.selectionManager = this.selectionManager || null;
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this.linkifier = this.linkifier || new Linkifier(this);
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this._mouseZoneManager = this._mouseZoneManager || null;
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this.soundManager = this.soundManager || new SoundManager(this);
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if (this.selectionManager) {
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this.selectionManager.clearSelection();
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this.selectionManager.initBuffersListeners();
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}
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if (this.options.windowsMode) {
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this._windowsMode = applyWindowsMode(this);
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}
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}
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/**
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* Convenience property to active buffer.
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*/
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public get buffer(): IBuffer {
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return this.buffers.active;
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}
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public get buffers(): IBufferSet {
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return this._bufferService.buffers;
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}
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/**
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* back_color_erase feature for xterm.
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*/
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public eraseAttrData(): IAttributeData {
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this._eraseAttrData.bg &= ~(Attributes.CM_MASK | 0xFFFFFF);
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this._eraseAttrData.bg |= this.curAttrData.bg & ~0xFC000000;
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return this._eraseAttrData;
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}
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/**
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* Focus the terminal. Delegates focus handling to the terminal's DOM element.
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*/
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public focus(): void {
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if (this.textarea) {
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this.textarea.focus({ preventScroll: true });
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}
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}
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public get isFocused(): boolean {
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return document.activeElement === this.textarea && document.hasFocus();
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}
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private _setupOptionsListeners(): void {
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// TODO: These listeners should be owned by individual components
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this.optionsService.onOptionChange(key => {
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switch (key) {
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case 'fontFamily':
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case 'fontSize':
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// When the font changes the size of the cells may change which requires a renderer clear
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if (this._renderService) {
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this._renderService.clear();
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}
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if (this._charSizeService) {
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this._charSizeService.measure();
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}
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break;
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case 'drawBoldTextInBrightColors':
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case 'letterSpacing':
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case 'lineHeight':
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case 'fontWeight':
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case 'fontWeightBold':
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// When the font changes the size of the cells may change which requires a renderer clear
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if (this._renderService) {
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this._renderService.clear();
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this._renderService.onResize(this.cols, this.rows);
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this.refresh(0, this.rows - 1);
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}
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break;
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case 'rendererType':
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if (this._renderService) {
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this._renderService.setRenderer(this._createRenderer());
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}
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break;
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case 'scrollback':
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this.buffers.resize(this.cols, this.rows);
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if (this.viewport) {
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this.viewport.syncScrollArea();
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}
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break;
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case 'screenReaderMode':
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if (this.optionsService.options.screenReaderMode) {
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if (!this._accessibilityManager && this._renderService) {
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this._accessibilityManager = new AccessibilityManager(this, this._renderService.dimensions);
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}
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} else {
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if (this._accessibilityManager) {
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this._accessibilityManager.dispose();
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this._accessibilityManager = null;
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}
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}
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break;
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case 'tabStopWidth': this.buffers.setupTabStops(); break;
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case 'theme':
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this._setTheme(this.optionsService.options.theme);
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break;
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case 'scrollback':
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const newBufferLength = this.rows + this.optionsService.options.scrollback;
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if (this.buffer.lines.length > newBufferLength) {
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const amountToTrim = this.buffer.lines.length - newBufferLength;
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const needsRefresh = (this.buffer.ydisp - amountToTrim < 0);
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this.buffer.lines.trimStart(amountToTrim);
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this.buffer.ybase = Math.max(this.buffer.ybase - amountToTrim, 0);
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this.buffer.ydisp = Math.max(this.buffer.ydisp - amountToTrim, 0);
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if (needsRefresh) {
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this.refresh(0, this.rows - 1);
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}
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}
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case 'windowsMode':
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if (this.optionsService.options.windowsMode) {
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if (!this._windowsMode) {
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this._windowsMode = applyWindowsMode(this);
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}
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} else {
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if (this._windowsMode) {
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this._windowsMode.dispose();
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this._windowsMode = undefined;
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}
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}
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break;
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}
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});
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}
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/**
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* Binds the desired focus behavior on a given terminal object.
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*/
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private _onTextAreaFocus(ev: KeyboardEvent): void {
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if (this.sendFocus) {
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this._coreService.triggerDataEvent(C0.ESC + '[I');
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}
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this.updateCursorStyle(ev);
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this.element.classList.add('focus');
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this.showCursor();
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this._onFocus.fire();
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}
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/**
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* Blur the terminal, calling the blur function on the terminal's underlying
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* textarea.
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*/
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public blur(): void {
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return this.textarea.blur();
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}
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/**
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* Binds the desired blur behavior on a given terminal object.
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*/
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private _onTextAreaBlur(): void {
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// Text can safely be removed on blur. Doing it earlier could interfere with
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// screen readers reading it out.
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this.textarea.value = '';
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this.refresh(this.buffer.y, this.buffer.y);
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if (this.sendFocus) {
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this._coreService.triggerDataEvent(C0.ESC + '[O');
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}
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this.element.classList.remove('focus');
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this._onBlur.fire();
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}
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/**
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* Initialize default behavior
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*/
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private _initGlobal(): void {
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this._bindKeys();
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// Bind clipboard functionality
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this.register(addDisposableDomListener(this.element, 'copy', (event: ClipboardEvent) => {
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// If mouse events are active it means the selection manager is disabled and
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// copy should be handled by the host program.
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if (!this.hasSelection()) {
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return;
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}
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copyHandler(event, this.selectionManager);
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}));
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const pasteHandlerWrapper = (event: ClipboardEvent) => pasteHandler(event, this.textarea, this.bracketedPasteMode, e => this._coreService.triggerDataEvent(e, true));
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this.register(addDisposableDomListener(this.textarea, 'paste', pasteHandlerWrapper));
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this.register(addDisposableDomListener(this.element, 'paste', pasteHandlerWrapper));
|
|
|
|
// Handle right click context menus
|
|
if (Browser.isFirefox) {
|
|
// Firefox doesn't appear to fire the contextmenu event on right click
|
|
this.register(addDisposableDomListener(this.element, 'mousedown', (event: MouseEvent) => {
|
|
if (event.button === 2) {
|
|
rightClickHandler(event, this.textarea, this.screenElement, this.selectionManager, this.options.rightClickSelectsWord);
|
|
}
|
|
}));
|
|
} else {
|
|
this.register(addDisposableDomListener(this.element, 'contextmenu', (event: MouseEvent) => {
|
|
rightClickHandler(event, this.textarea, this.screenElement, this.selectionManager, this.options.rightClickSelectsWord);
|
|
}));
|
|
}
|
|
|
|
// Move the textarea under the cursor when middle clicking on Linux to ensure
|
|
// middle click to paste selection works. This only appears to work in Chrome
|
|
// at the time is writing.
|
|
if (Browser.isLinux) {
|
|
// Use auxclick event over mousedown the latter doesn't seem to work. Note
|
|
// that the regular click event doesn't fire for the middle mouse button.
|
|
this.register(addDisposableDomListener(this.element, 'auxclick', (event: MouseEvent) => {
|
|
if (event.button === 1) {
|
|
moveTextAreaUnderMouseCursor(event, this.textarea, this.screenElement);
|
|
}
|
|
}));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Apply key handling to the terminal
|
|
*/
|
|
private _bindKeys(): void {
|
|
const self = this;
|
|
this.register(addDisposableDomListener(this.element, 'keydown', function (ev: KeyboardEvent): void {
|
|
if (document.activeElement !== this) {
|
|
return;
|
|
}
|
|
self._keyDown(ev);
|
|
}, true));
|
|
|
|
this.register(addDisposableDomListener(this.element, 'keypress', function (ev: KeyboardEvent): void {
|
|
if (document.activeElement !== this) {
|
|
return;
|
|
}
|
|
self._keyPress(ev);
|
|
}, true));
|
|
|
|
this.register(addDisposableDomListener(this.element, 'keyup', (ev: KeyboardEvent) => {
|
|
if (!wasModifierKeyOnlyEvent(ev)) {
|
|
this.focus();
|
|
}
|
|
|
|
self._keyUp(ev);
|
|
}, true));
|
|
|
|
this.register(addDisposableDomListener(this.textarea, 'keydown', (ev: KeyboardEvent) => this._keyDown(ev), true));
|
|
this.register(addDisposableDomListener(this.textarea, 'keypress', (ev: KeyboardEvent) => this._keyPress(ev), true));
|
|
this.register(addDisposableDomListener(this.textarea, 'compositionstart', () => this._compositionHelper.compositionstart()));
|
|
this.register(addDisposableDomListener(this.textarea, 'compositionupdate', (e: CompositionEvent) => this._compositionHelper.compositionupdate(e)));
|
|
this.register(addDisposableDomListener(this.textarea, 'compositionend', () => this._compositionHelper.compositionend()));
|
|
this.register(this.onRender(() => this._compositionHelper.updateCompositionElements()));
|
|
this.register(this.onRender(e => this._queueLinkification(e.start, e.end)));
|
|
}
|
|
|
|
/**
|
|
* Opens the terminal within an element.
|
|
*
|
|
* @param parent The element to create the terminal within.
|
|
*/
|
|
public open(parent: HTMLElement): void {
|
|
this._parent = parent || this._parent;
|
|
|
|
if (!this._parent) {
|
|
throw new Error('Terminal requires a parent element.');
|
|
}
|
|
|
|
// Grab global elements
|
|
this._context = this._parent.ownerDocument.defaultView;
|
|
this._document = this._parent.ownerDocument;
|
|
|
|
// Create main element container
|
|
this.element = this._document.createElement('div');
|
|
this.element.dir = 'ltr'; // xterm.css assumes LTR
|
|
this.element.classList.add('terminal');
|
|
this.element.classList.add('xterm');
|
|
this.element.setAttribute('tabindex', '0');
|
|
this._parent.appendChild(this.element);
|
|
|
|
// Performance: Use a document fragment to build the terminal
|
|
// viewport and helper elements detached from the DOM
|
|
const fragment = document.createDocumentFragment();
|
|
this._viewportElement = document.createElement('div');
|
|
this._viewportElement.classList.add('xterm-viewport');
|
|
fragment.appendChild(this._viewportElement);
|
|
this._viewportScrollArea = document.createElement('div');
|
|
this._viewportScrollArea.classList.add('xterm-scroll-area');
|
|
this._viewportElement.appendChild(this._viewportScrollArea);
|
|
|
|
this.screenElement = document.createElement('div');
|
|
this.screenElement.classList.add('xterm-screen');
|
|
// Create the container that will hold helpers like the textarea for
|
|
// capturing DOM Events. Then produce the helpers.
|
|
this._helperContainer = document.createElement('div');
|
|
this._helperContainer.classList.add('xterm-helpers');
|
|
this.screenElement.appendChild(this._helperContainer);
|
|
fragment.appendChild(this.screenElement);
|
|
|
|
this.textarea = document.createElement('textarea');
|
|
this.textarea.classList.add('xterm-helper-textarea');
|
|
this.textarea.setAttribute('aria-label', Strings.promptLabel);
|
|
this.textarea.setAttribute('aria-multiline', 'false');
|
|
this.textarea.setAttribute('autocorrect', 'off');
|
|
this.textarea.setAttribute('autocapitalize', 'off');
|
|
this.textarea.setAttribute('spellcheck', 'false');
|
|
this.textarea.tabIndex = 0;
|
|
this.register(addDisposableDomListener(this.textarea, 'focus', (ev: KeyboardEvent) => this._onTextAreaFocus(ev)));
|
|
this.register(addDisposableDomListener(this.textarea, 'blur', () => this._onTextAreaBlur()));
|
|
this._helperContainer.appendChild(this.textarea);
|
|
|
|
this._charSizeService = new CharSizeService(this._document, this._helperContainer, this.optionsService);
|
|
|
|
this._compositionView = document.createElement('div');
|
|
this._compositionView.classList.add('composition-view');
|
|
this._compositionHelper = new CompositionHelper(this.textarea, this._compositionView, this, this._charSizeService, this._coreService);
|
|
this._helperContainer.appendChild(this._compositionView);
|
|
|
|
// Performance: Add viewport and helper elements from the fragment
|
|
this.element.appendChild(fragment);
|
|
|
|
this._theme = this.options.theme;
|
|
this.options.theme = null;
|
|
this._colorManager = new ColorManager(document, this.options.allowTransparency);
|
|
this._colorManager.setTheme(this._theme);
|
|
|
|
const renderer = this._createRenderer();
|
|
this._renderService = new RenderService(renderer, this.rows, this.screenElement, this.optionsService, this._charSizeService);
|
|
this._renderService.onRender(e => this._onRender.fire(e));
|
|
this.onResize(e => this._renderService.resize(e.cols, e.rows));
|
|
|
|
this._mouseService = new MouseService(this._renderService, this._charSizeService);
|
|
|
|
this._mouseZoneManager = new MouseZoneManager(this, this._mouseService);
|
|
this.register(this._mouseZoneManager);
|
|
this.register(this.onScroll(() => this._mouseZoneManager.clearAll()));
|
|
this.linkifier.attachToDom(this._mouseZoneManager);
|
|
|
|
this.viewport = new Viewport(this, this._viewportElement, this._viewportScrollArea, this._renderService.dimensions, this._charSizeService);
|
|
this.viewport.onThemeChange(this._colorManager.colors);
|
|
this.register(this.viewport);
|
|
|
|
this.register(this.onCursorMove(() => this._renderService.onCursorMove()));
|
|
this.register(this.onResize(() => this._renderService.onResize(this.cols, this.rows)));
|
|
this.register(this.onBlur(() => this._renderService.onBlur()));
|
|
this.register(this.onFocus(() => this._renderService.onFocus()));
|
|
this.register(this._renderService.onDimensionsChange(() => this.viewport.syncScrollArea()));
|
|
|
|
this.selectionManager = new SelectionManager(this, this.screenElement, this._charSizeService, this._bufferService, this._coreService, this._mouseService, this.optionsService);
|
|
this.register(this.selectionManager.onSelectionChange(() => this._onSelectionChange.fire()));
|
|
this.register(addDisposableDomListener(this.element, 'mousedown', (e: MouseEvent) => this.selectionManager.onMouseDown(e)));
|
|
this.register(this.selectionManager.onRedrawRequest(e => this._renderService.onSelectionChanged(e.start, e.end, e.columnSelectMode)));
|
|
this.register(this.selectionManager.onLinuxMouseSelection(text => {
|
|
// If there's a new selection, put it into the textarea, focus and select it
|
|
// in order to register it as a selection on the OS. This event is fired
|
|
// only on Linux to enable middle click to paste selection.
|
|
this.textarea.value = text;
|
|
this.textarea.focus();
|
|
this.textarea.select();
|
|
}));
|
|
this.register(this.onScroll(() => {
|
|
this.viewport.syncScrollArea();
|
|
this.selectionManager.refresh();
|
|
}));
|
|
this.register(addDisposableDomListener(this._viewportElement, 'scroll', () => this.selectionManager.refresh()));
|
|
|
|
// apply mouse event classes set by escape codes before terminal was attached
|
|
this.element.classList.toggle('enable-mouse-events', this.mouseEvents);
|
|
if (this.mouseEvents) {
|
|
this.selectionManager.disable();
|
|
} else {
|
|
this.selectionManager.enable();
|
|
}
|
|
|
|
if (this.options.screenReaderMode) {
|
|
// Note that this must be done *after* the renderer is created in order to
|
|
// ensure the correct order of the dprchange event
|
|
this._accessibilityManager = new AccessibilityManager(this, this._renderService.dimensions);
|
|
this._accessibilityManager.register(this._renderService.onDimensionsChange(e => this._accessibilityManager.setDimensions(e)));
|
|
}
|
|
|
|
// Measure the character size
|
|
this._charSizeService.measure();
|
|
|
|
// Setup loop that draws to screen
|
|
this.refresh(0, this.rows - 1);
|
|
|
|
// Initialize global actions that need to be taken on the document.
|
|
this._initGlobal();
|
|
|
|
// Listen for mouse events and translate
|
|
// them into terminal mouse protocols.
|
|
this.bindMouse();
|
|
|
|
}
|
|
|
|
private _createRenderer(): IRenderer {
|
|
switch (this.options.rendererType) {
|
|
case 'canvas': return new Renderer(this, this._colorManager.colors, this._charSizeService); break;
|
|
case 'dom': return new DomRenderer(this, this._colorManager.colors, this._charSizeService, this.optionsService); break;
|
|
default: throw new Error(`Unrecognized rendererType "${this.options.rendererType}"`);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the theme on the renderer. The renderer must have been initialized.
|
|
* @param theme The theme to set.
|
|
*/
|
|
private _setTheme(theme: ITheme): void {
|
|
this._theme = theme;
|
|
if (this._colorManager) {
|
|
this._colorManager.setTheme(theme);
|
|
}
|
|
if (this._renderService) {
|
|
this._renderService.setColors(this._colorManager.colors);
|
|
}
|
|
if (this.viewport) {
|
|
this.viewport.onThemeChange(this._colorManager.colors);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* XTerm mouse events
|
|
* http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#Mouse%20Tracking
|
|
* To better understand these
|
|
* the xterm code is very helpful:
|
|
* Relevant files:
|
|
* button.c, charproc.c, misc.c
|
|
* Relevant functions in xterm/button.c:
|
|
* BtnCode, EmitButtonCode, EditorButton, SendMousePosition
|
|
*/
|
|
public bindMouse(): void {
|
|
const el = this.element;
|
|
const self = this;
|
|
let pressed = 32;
|
|
|
|
// mouseup, mousedown, wheel
|
|
// left click: ^[[M 3<^[[M#3<
|
|
// wheel up: ^[[M`3>
|
|
function sendButton(ev: MouseEvent | WheelEvent): void {
|
|
let button;
|
|
let pos;
|
|
|
|
// get the xterm-style button
|
|
button = getButton(ev);
|
|
|
|
// get mouse coordinates
|
|
pos = self._mouseService.getRawByteCoords(ev, self.screenElement, self.cols, self.rows);
|
|
if (!pos) return;
|
|
|
|
sendEvent(button, pos);
|
|
|
|
switch ((<any>ev).overrideType || ev.type) {
|
|
case 'mousedown':
|
|
pressed = button;
|
|
break;
|
|
case 'mouseup':
|
|
// keep it at the left
|
|
// button, just in case.
|
|
pressed = 32;
|
|
break;
|
|
case 'wheel':
|
|
// nothing. don't
|
|
// interfere with
|
|
// `pressed`.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// motion example of a left click:
|
|
// ^[[M 3<^[[M@4<^[[M@5<^[[M@6<^[[M@7<^[[M#7<
|
|
function sendMove(ev: MouseEvent): void {
|
|
let button = pressed;
|
|
const pos = self._mouseService.getRawByteCoords(ev, self.screenElement, self.cols, self.rows);
|
|
if (!pos) return;
|
|
|
|
// buttons marked as motions
|
|
// are incremented by 32
|
|
button += 32;
|
|
|
|
sendEvent(button, pos);
|
|
}
|
|
|
|
// encode button and
|
|
// position to characters
|
|
function encode(data: number[], ch: number): void {
|
|
if (!self.utfMouse) {
|
|
if (ch === 255) {
|
|
data.push(0);
|
|
return;
|
|
}
|
|
if (ch > 127) ch = 127;
|
|
data.push(ch);
|
|
} else {
|
|
if (ch > 2047) {
|
|
data.push(2047);
|
|
return;
|
|
}
|
|
data.push(ch);
|
|
}
|
|
}
|
|
|
|
// send a mouse event:
|
|
// regular/utf8: ^[[M Cb Cx Cy
|
|
// urxvt: ^[[ Cb ; Cx ; Cy M
|
|
// sgr: ^[[ Cb ; Cx ; Cy M/m
|
|
// vt300: ^[[ 24(1/3/5)~ [ Cx , Cy ] \r
|
|
// locator: CSI P e ; P b ; P r ; P c ; P p & w
|
|
function sendEvent(button: number, pos: {x: number, y: number}): void {
|
|
if (self._vt300Mouse) {
|
|
// NOTE: Unstable.
|
|
// http://www.vt100.net/docs/vt3xx-gp/chapter15.html
|
|
button &= 3;
|
|
pos.x -= 32;
|
|
pos.y -= 32;
|
|
let data = C0.ESC + '[24';
|
|
if (button === 0) data += '1';
|
|
else if (button === 1) data += '3';
|
|
else if (button === 2) data += '5';
|
|
else if (button === 3) return;
|
|
else data += '0';
|
|
data += '~[' + pos.x + ',' + pos.y + ']\r';
|
|
self._coreService.triggerDataEvent(data, true);
|
|
return;
|
|
}
|
|
|
|
if (self._decLocator) {
|
|
// NOTE: Unstable.
|
|
button &= 3;
|
|
pos.x -= 32;
|
|
pos.y -= 32;
|
|
if (button === 0) button = 2;
|
|
else if (button === 1) button = 4;
|
|
else if (button === 2) button = 6;
|
|
else if (button === 3) button = 3;
|
|
self._coreService.triggerDataEvent(C0.ESC + '['
|
|
+ button
|
|
+ ';'
|
|
+ (button === 3 ? 4 : 0)
|
|
+ ';'
|
|
+ pos.y
|
|
+ ';'
|
|
+ pos.x
|
|
+ ';'
|
|
// Not sure what page is meant to be
|
|
+ (<any>pos).page || 0
|
|
+ '&w', true);
|
|
return;
|
|
}
|
|
|
|
if (self.urxvtMouse) {
|
|
pos.x -= 32;
|
|
pos.y -= 32;
|
|
pos.x++;
|
|
pos.y++;
|
|
self._coreService.triggerDataEvent(C0.ESC + '[' + button + ';' + pos.x + ';' + pos.y + 'M', true);
|
|
return;
|
|
}
|
|
|
|
if (self.sgrMouse) {
|
|
pos.x -= 32;
|
|
pos.y -= 32;
|
|
self._coreService.triggerDataEvent(C0.ESC + '[<'
|
|
+ (((button & 3) === 3 ? button & ~3 : button) - 32)
|
|
+ ';'
|
|
+ pos.x
|
|
+ ';'
|
|
+ pos.y
|
|
+ ((button & 3) === 3 ? 'm' : 'M'), true);
|
|
return;
|
|
}
|
|
|
|
const data: number[] = [];
|
|
|
|
encode(data, button);
|
|
encode(data, pos.x);
|
|
encode(data, pos.y);
|
|
|
|
self._coreService.triggerDataEvent(C0.ESC + '[M' + String.fromCharCode.apply(String, data), true);
|
|
}
|
|
|
|
function getButton(ev: MouseEvent): number {
|
|
let button;
|
|
let shift;
|
|
let meta;
|
|
let ctrl;
|
|
let mod;
|
|
|
|
// two low bits:
|
|
// 0 = left
|
|
// 1 = middle
|
|
// 2 = right
|
|
// 3 = release
|
|
// wheel up/down:
|
|
// 1, and 2 - with 64 added
|
|
switch ((<any>ev).overrideType || ev.type) {
|
|
case 'mousedown':
|
|
button = ev.button !== null && ev.button !== undefined
|
|
? +ev.button
|
|
: ev.which !== null && ev.which !== undefined
|
|
? ev.which - 1
|
|
: null;
|
|
break;
|
|
case 'mouseup':
|
|
button = 3;
|
|
break;
|
|
case 'DOMMouseScroll':
|
|
button = ev.detail < 0
|
|
? 64
|
|
: 65;
|
|
break;
|
|
case 'wheel':
|
|
button = (<WheelEvent>ev).deltaY < 0
|
|
? 64
|
|
: 65;
|
|
break;
|
|
}
|
|
|
|
// next three bits are the modifiers:
|
|
// 4 = shift, 8 = meta, 16 = control
|
|
shift = ev.shiftKey ? 4 : 0;
|
|
meta = ev.metaKey ? 8 : 0;
|
|
ctrl = ev.ctrlKey ? 16 : 0;
|
|
mod = shift | meta | ctrl;
|
|
|
|
// no mods
|
|
if (self.vt200Mouse) {
|
|
// ctrl only
|
|
mod &= ctrl;
|
|
} else if (!self.normalMouse) {
|
|
mod = 0;
|
|
}
|
|
|
|
// increment to SP
|
|
button = (32 + (mod << 2)) + button;
|
|
|
|
return button;
|
|
}
|
|
|
|
this.register(addDisposableDomListener(el, 'mousedown', (ev: MouseEvent) => {
|
|
|
|
// Prevent the focus on the textarea from getting lost
|
|
// and make sure we get focused on mousedown
|
|
ev.preventDefault();
|
|
this.focus();
|
|
|
|
// Don't send the mouse button to the pty if mouse events are disabled or
|
|
// if the selection manager is having selection forced (ie. a modifier is
|
|
// held).
|
|
if (!this.mouseEvents || this.selectionManager.shouldForceSelection(ev)) {
|
|
return;
|
|
}
|
|
|
|
// send the button
|
|
sendButton(ev);
|
|
|
|
// fix for odd bug
|
|
// if (this.vt200Mouse && !this.normalMouse) {
|
|
if (this.vt200Mouse) {
|
|
(<any>ev).overrideType = 'mouseup';
|
|
sendButton(ev);
|
|
return this.cancel(ev);
|
|
}
|
|
|
|
// TODO: All mouse handling should be pulled into its own file.
|
|
|
|
// bind events
|
|
let moveHandler: (event: MouseEvent) => void;
|
|
if (this.normalMouse) {
|
|
moveHandler = (event: MouseEvent) => {
|
|
// Do nothing if normal mouse mode is on. This can happen if the mouse is held down when the
|
|
// terminal exits normalMouse mode.
|
|
if (!this.normalMouse) {
|
|
return;
|
|
}
|
|
sendMove(event);
|
|
};
|
|
// TODO: these event listeners should be managed by the disposable, the Terminal reference may
|
|
// be kept aroud if Terminal.dispose is fired when the mouse is down
|
|
this._document.addEventListener('mousemove', moveHandler);
|
|
}
|
|
|
|
// x10 compatibility mode can't send button releases
|
|
const handler = (ev: MouseEvent) => {
|
|
if (this.normalMouse && !this.x10Mouse) {
|
|
sendButton(ev);
|
|
}
|
|
if (moveHandler) {
|
|
// Even though this should only be attached when this.normalMouse is true, holding the
|
|
// mouse button down when normalMouse changes can happen. Just always try to remove it.
|
|
this._document.removeEventListener('mousemove', moveHandler);
|
|
moveHandler = null;
|
|
}
|
|
this._document.removeEventListener('mouseup', handler);
|
|
return this.cancel(ev);
|
|
};
|
|
this._document.addEventListener('mouseup', handler);
|
|
|
|
return this.cancel(ev);
|
|
}));
|
|
|
|
// if (this.normalMouse) {
|
|
// on(this.document, 'mousemove', sendMove);
|
|
// }
|
|
|
|
this.register(addDisposableDomListener(el, 'wheel', (ev: WheelEvent) => {
|
|
if (!this.mouseEvents) {
|
|
// Convert wheel events into up/down events when the buffer does not have scrollback, this
|
|
// enables scrolling in apps hosted in the alt buffer such as vim or tmux.
|
|
if (!this.buffer.hasScrollback) {
|
|
const amount = this.viewport.getLinesScrolled(ev);
|
|
|
|
// Do nothing if there's no vertical scroll
|
|
if (amount === 0) {
|
|
return;
|
|
}
|
|
|
|
// Construct and send sequences
|
|
const sequence = C0.ESC + (this.applicationCursor ? 'O' : '[') + ( ev.deltaY < 0 ? 'A' : 'B');
|
|
let data = '';
|
|
for (let i = 0; i < Math.abs(amount); i++) {
|
|
data += sequence;
|
|
}
|
|
this._coreService.triggerDataEvent(data, true);
|
|
}
|
|
return;
|
|
}
|
|
if (this.x10Mouse || this._vt300Mouse || this._decLocator) return;
|
|
sendButton(ev);
|
|
ev.preventDefault();
|
|
}));
|
|
|
|
// allow wheel scrolling in
|
|
// the shell for example
|
|
this.register(addDisposableDomListener(el, 'wheel', (ev: WheelEvent) => {
|
|
if (this.mouseEvents) return;
|
|
this.viewport.onWheel(ev);
|
|
return this.cancel(ev);
|
|
}));
|
|
|
|
this.register(addDisposableDomListener(el, 'touchstart', (ev: TouchEvent) => {
|
|
if (this.mouseEvents) return;
|
|
this.viewport.onTouchStart(ev);
|
|
return this.cancel(ev);
|
|
}));
|
|
|
|
this.register(addDisposableDomListener(el, 'touchmove', (ev: TouchEvent) => {
|
|
if (this.mouseEvents) return;
|
|
this.viewport.onTouchMove(ev);
|
|
return this.cancel(ev);
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Tells the renderer to refresh terminal content between two rows (inclusive) at the next
|
|
* opportunity.
|
|
* @param start The row to start from (between 0 and this.rows - 1).
|
|
* @param end The row to end at (between start and this.rows - 1).
|
|
*/
|
|
public refresh(start: number, end: number): void {
|
|
if (this._renderService) {
|
|
this._renderService.refreshRows(start, end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Queues linkification for the specified rows.
|
|
* @param start The row to start from (between 0 and this.rows - 1).
|
|
* @param end The row to end at (between start and this.rows - 1).
|
|
*/
|
|
private _queueLinkification(start: number, end: number): void {
|
|
if (this.linkifier) {
|
|
this.linkifier.linkifyRows(start, end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Change the cursor style for different selection modes
|
|
*/
|
|
public updateCursorStyle(ev: KeyboardEvent): void {
|
|
if (this.selectionManager && this.selectionManager.shouldColumnSelect(ev)) {
|
|
this.element.classList.add('column-select');
|
|
} else {
|
|
this.element.classList.remove('column-select');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display the cursor element
|
|
*/
|
|
public showCursor(): void {
|
|
if (!this.cursorState) {
|
|
this.cursorState = 1;
|
|
this.refresh(this.buffer.y, this.buffer.y);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scroll the terminal down 1 row, creating a blank line.
|
|
* @param isWrapped Whether the new line is wrapped from the previous line.
|
|
*/
|
|
public scroll(isWrapped: boolean = false): void {
|
|
let newLine: IBufferLine;
|
|
newLine = this._blankLine;
|
|
const eraseAttr = this.eraseAttrData();
|
|
if (!newLine || newLine.length !== this.cols || newLine.getFg(0) !== eraseAttr.fg || newLine.getBg(0) !== eraseAttr.bg) {
|
|
newLine = this.buffer.getBlankLine(eraseAttr, isWrapped);
|
|
this._blankLine = newLine;
|
|
}
|
|
newLine.isWrapped = isWrapped;
|
|
|
|
const topRow = this.buffer.ybase + this.buffer.scrollTop;
|
|
const bottomRow = this.buffer.ybase + this.buffer.scrollBottom;
|
|
|
|
if (this.buffer.scrollTop === 0) {
|
|
// Determine whether the buffer is going to be trimmed after insertion.
|
|
const willBufferBeTrimmed = this.buffer.lines.isFull;
|
|
|
|
// Insert the line using the fastest method
|
|
if (bottomRow === this.buffer.lines.length - 1) {
|
|
if (willBufferBeTrimmed) {
|
|
this.buffer.lines.recycle().copyFrom(newLine);
|
|
} else {
|
|
this.buffer.lines.push(newLine.clone());
|
|
}
|
|
} else {
|
|
this.buffer.lines.splice(bottomRow + 1, 0, newLine.clone());
|
|
}
|
|
|
|
// Only adjust ybase and ydisp when the buffer is not trimmed
|
|
if (!willBufferBeTrimmed) {
|
|
this.buffer.ybase++;
|
|
// Only scroll the ydisp with ybase if the user has not scrolled up
|
|
if (!this._userScrolling) {
|
|
this.buffer.ydisp++;
|
|
}
|
|
} else {
|
|
// When the buffer is full and the user has scrolled up, keep the text
|
|
// stable unless ydisp is right at the top
|
|
if (this._userScrolling) {
|
|
this.buffer.ydisp = Math.max(this.buffer.ydisp - 1, 0);
|
|
}
|
|
}
|
|
} else {
|
|
// scrollTop is non-zero which means no line will be going to the
|
|
// scrollback, instead we can just shift them in-place.
|
|
const scrollRegionHeight = bottomRow - topRow + 1/*as it's zero-based*/;
|
|
this.buffer.lines.shiftElements(topRow + 1, scrollRegionHeight - 1, -1);
|
|
this.buffer.lines.set(bottomRow, newLine.clone());
|
|
}
|
|
|
|
// Move the viewport to the bottom of the buffer unless the user is
|
|
// scrolling.
|
|
if (!this._userScrolling) {
|
|
this.buffer.ydisp = this.buffer.ybase;
|
|
}
|
|
|
|
// Flag rows that need updating
|
|
this.updateRange(this.buffer.scrollTop);
|
|
this.updateRange(this.buffer.scrollBottom);
|
|
|
|
this._onScroll.fire(this.buffer.ydisp);
|
|
}
|
|
|
|
/**
|
|
* Scroll the display of the terminal
|
|
* @param disp The number of lines to scroll down (negative scroll up).
|
|
* @param suppressScrollEvent Don't emit the scroll event as scrollLines. This is used
|
|
* to avoid unwanted events being handled by the viewport when the event was triggered from the
|
|
* viewport originally.
|
|
*/
|
|
public scrollLines(disp: number, suppressScrollEvent?: boolean): void {
|
|
if (disp < 0) {
|
|
if (this.buffer.ydisp === 0) {
|
|
return;
|
|
}
|
|
this._userScrolling = true;
|
|
} else if (disp + this.buffer.ydisp >= this.buffer.ybase) {
|
|
this._userScrolling = false;
|
|
}
|
|
|
|
const oldYdisp = this.buffer.ydisp;
|
|
this.buffer.ydisp = Math.max(Math.min(this.buffer.ydisp + disp, this.buffer.ybase), 0);
|
|
|
|
// No change occurred, don't trigger scroll/refresh
|
|
if (oldYdisp === this.buffer.ydisp) {
|
|
return;
|
|
}
|
|
|
|
if (!suppressScrollEvent) {
|
|
this._onScroll.fire(this.buffer.ydisp);
|
|
}
|
|
|
|
this.refresh(0, this.rows - 1);
|
|
}
|
|
|
|
/**
|
|
* Scroll the display of the terminal by a number of pages.
|
|
* @param pageCount The number of pages to scroll (negative scrolls up).
|
|
*/
|
|
public scrollPages(pageCount: number): void {
|
|
this.scrollLines(pageCount * (this.rows - 1));
|
|
}
|
|
|
|
/**
|
|
* Scrolls the display of the terminal to the top.
|
|
*/
|
|
public scrollToTop(): void {
|
|
this.scrollLines(-this.buffer.ydisp);
|
|
}
|
|
|
|
/**
|
|
* Scrolls the display of the terminal to the bottom.
|
|
*/
|
|
public scrollToBottom(): void {
|
|
this.scrollLines(this.buffer.ybase - this.buffer.ydisp);
|
|
}
|
|
|
|
public scrollToLine(line: number): void {
|
|
const scrollAmount = line - this.buffer.ydisp;
|
|
if (scrollAmount !== 0) {
|
|
this.scrollLines(scrollAmount);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes raw utf8 bytes to the terminal.
|
|
* @param data UintArray with UTF8 bytes to write to the terminal.
|
|
*/
|
|
public writeUtf8(data: Uint8Array): void {
|
|
// Ensure the terminal isn't disposed
|
|
if (this._isDisposed) {
|
|
return;
|
|
}
|
|
|
|
// Ignore falsy data values
|
|
if (!data) {
|
|
return;
|
|
}
|
|
|
|
this.writeBufferUtf8.push(data);
|
|
|
|
// Send XOFF to pause the pty process if the write buffer becomes too large so
|
|
// xterm.js can catch up before more data is sent. This is necessary in order
|
|
// to keep signals such as ^C responsive.
|
|
if (this.options.useFlowControl && !this._xoffSentToCatchUp && this.writeBufferUtf8.length >= WRITE_BUFFER_PAUSE_THRESHOLD) {
|
|
// XOFF - stop pty pipe
|
|
// XON will be triggered by emulator before processing data chunk
|
|
this._coreService.triggerDataEvent(C0.DC3);
|
|
this._xoffSentToCatchUp = true;
|
|
}
|
|
|
|
if (!this._writeInProgress && this.writeBufferUtf8.length > 0) {
|
|
// Kick off a write which will write all data in sequence recursively
|
|
this._writeInProgress = true;
|
|
// Kick off an async innerWrite so more writes can come in while processing data
|
|
setTimeout(() => {
|
|
this._innerWriteUtf8();
|
|
});
|
|
}
|
|
}
|
|
|
|
protected _innerWriteUtf8(bufferOffset: number = 0): void {
|
|
// Ensure the terminal isn't disposed
|
|
if (this._isDisposed) {
|
|
this.writeBufferUtf8 = [];
|
|
}
|
|
|
|
const startTime = Date.now();
|
|
while (this.writeBufferUtf8.length > bufferOffset) {
|
|
const data = this.writeBufferUtf8[bufferOffset];
|
|
bufferOffset++;
|
|
|
|
// If XOFF was sent in order to catch up with the pty process, resume it if
|
|
// we reached the end of the writeBuffer to allow more data to come in.
|
|
if (this._xoffSentToCatchUp && this.writeBufferUtf8.length === bufferOffset) {
|
|
this._coreService.triggerDataEvent(C0.DC1);
|
|
this._xoffSentToCatchUp = false;
|
|
}
|
|
|
|
this._refreshStart = this.buffer.y;
|
|
this._refreshEnd = this.buffer.y;
|
|
|
|
// HACK: Set the parser state based on it's state at the time of return.
|
|
// This works around the bug #662 which saw the parser state reset in the
|
|
// middle of parsing escape sequence in two chunks. For some reason the
|
|
// state of the parser resets to 0 after exiting parser.parse. This change
|
|
// just sets the state back based on the correct return statement.
|
|
|
|
this._inputHandler.parseUtf8(data);
|
|
|
|
this.updateRange(this.buffer.y);
|
|
this.refresh(this._refreshStart, this._refreshEnd);
|
|
|
|
if (Date.now() - startTime >= WRITE_TIMEOUT_MS) {
|
|
break;
|
|
}
|
|
}
|
|
if (this.writeBufferUtf8.length > bufferOffset) {
|
|
// Allow renderer to catch up before processing the next batch
|
|
// trim already processed chunks if we are above threshold
|
|
if (bufferOffset > WRITE_BUFFER_LENGTH_THRESHOLD) {
|
|
this.writeBufferUtf8 = this.writeBufferUtf8.slice(bufferOffset);
|
|
bufferOffset = 0;
|
|
}
|
|
setTimeout(() => this._innerWriteUtf8(bufferOffset), 0);
|
|
} else {
|
|
this._writeInProgress = false;
|
|
this.writeBufferUtf8 = [];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes text to the terminal.
|
|
* @param data The text to write to the terminal.
|
|
*/
|
|
public write(data: string): void {
|
|
// Ensure the terminal isn't disposed
|
|
if (this._isDisposed) {
|
|
return;
|
|
}
|
|
|
|
// Ignore falsy data values (including the empty string)
|
|
if (!data) {
|
|
return;
|
|
}
|
|
|
|
this.writeBuffer.push(data);
|
|
|
|
// Send XOFF to pause the pty process if the write buffer becomes too large so
|
|
// xterm.js can catch up before more data is sent. This is necessary in order
|
|
// to keep signals such as ^C responsive.
|
|
if (this.options.useFlowControl && !this._xoffSentToCatchUp && this.writeBuffer.length >= WRITE_BUFFER_PAUSE_THRESHOLD) {
|
|
// XOFF - stop pty pipe
|
|
// XON will be triggered by emulator before processing data chunk
|
|
this._coreService.triggerDataEvent(C0.DC3);
|
|
this._xoffSentToCatchUp = true;
|
|
}
|
|
|
|
if (!this._writeInProgress && this.writeBuffer.length > 0) {
|
|
// Kick off a write which will write all data in sequence recursively
|
|
this._writeInProgress = true;
|
|
// Kick off an async innerWrite so more writes can come in while processing data
|
|
setTimeout(() => {
|
|
this._innerWrite();
|
|
});
|
|
}
|
|
}
|
|
|
|
protected _innerWrite(bufferOffset: number = 0): void {
|
|
// Ensure the terminal isn't disposed
|
|
if (this._isDisposed) {
|
|
this.writeBuffer = [];
|
|
}
|
|
|
|
const startTime = Date.now();
|
|
while (this.writeBuffer.length > bufferOffset) {
|
|
const data = this.writeBuffer[bufferOffset];
|
|
bufferOffset++;
|
|
|
|
// If XOFF was sent in order to catch up with the pty process, resume it if
|
|
// we reached the end of the writeBuffer to allow more data to come in.
|
|
if (this._xoffSentToCatchUp && this.writeBuffer.length === bufferOffset) {
|
|
this._coreService.triggerDataEvent(C0.DC1);
|
|
this._xoffSentToCatchUp = false;
|
|
}
|
|
|
|
this._refreshStart = this.buffer.y;
|
|
this._refreshEnd = this.buffer.y;
|
|
|
|
// HACK: Set the parser state based on it's state at the time of return.
|
|
// This works around the bug #662 which saw the parser state reset in the
|
|
// middle of parsing escape sequence in two chunks. For some reason the
|
|
// state of the parser resets to 0 after exiting parser.parse. This change
|
|
// just sets the state back based on the correct return statement.
|
|
|
|
this._inputHandler.parse(data);
|
|
|
|
this.updateRange(this.buffer.y);
|
|
this.refresh(this._refreshStart, this._refreshEnd);
|
|
|
|
if (Date.now() - startTime >= WRITE_TIMEOUT_MS) {
|
|
break;
|
|
}
|
|
}
|
|
if (this.writeBuffer.length > bufferOffset) {
|
|
// Allow renderer to catch up before processing the next batch
|
|
// trim already processed chunks if we are above threshold
|
|
if (bufferOffset > WRITE_BUFFER_LENGTH_THRESHOLD) {
|
|
this.writeBuffer = this.writeBuffer.slice(bufferOffset);
|
|
bufferOffset = 0;
|
|
}
|
|
setTimeout(() => this._innerWrite(bufferOffset), 0);
|
|
} else {
|
|
this._writeInProgress = false;
|
|
this.writeBuffer = [];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Writes text to the terminal, followed by a break line character (\n).
|
|
* @param data The text to write to the terminal.
|
|
*/
|
|
public writeln(data: string): void {
|
|
this.write(data + '\r\n');
|
|
}
|
|
|
|
/**
|
|
* Attaches a custom key event handler which is run before keys are processed,
|
|
* giving consumers of xterm.js ultimate control as to what keys should be
|
|
* processed by the terminal and what keys should not.
|
|
* @param customKeyEventHandler The custom KeyboardEvent handler to attach.
|
|
* This is a function that takes a KeyboardEvent, allowing consumers to stop
|
|
* propagation and/or prevent the default action. The function returns whether
|
|
* the event should be processed by xterm.js.
|
|
*/
|
|
public attachCustomKeyEventHandler(customKeyEventHandler: CustomKeyEventHandler): void {
|
|
this._customKeyEventHandler = customKeyEventHandler;
|
|
}
|
|
|
|
/** Add handler for CSI escape sequence. See xterm.d.ts for details. */
|
|
public addCsiHandler(flag: string, callback: (params: number[], collect: string) => boolean): IDisposable {
|
|
return this._inputHandler.addCsiHandler(flag, callback);
|
|
}
|
|
/** Add handler for OSC escape sequence. See xterm.d.ts for details. */
|
|
public addOscHandler(ident: number, callback: (data: string) => boolean): IDisposable {
|
|
return this._inputHandler.addOscHandler(ident, callback);
|
|
}
|
|
|
|
/**
|
|
* Registers a link matcher, allowing custom link patterns to be matched and
|
|
* handled.
|
|
* @param regex The regular expression to search for, specifically
|
|
* this searches the textContent of the rows. You will want to use \s to match
|
|
* a space ' ' character for example.
|
|
* @param handler The callback when the link is called.
|
|
* @param options Options for the link matcher.
|
|
* @return The ID of the new matcher, this can be used to deregister.
|
|
*/
|
|
public registerLinkMatcher(regex: RegExp, handler: LinkMatcherHandler, options?: ILinkMatcherOptions): number {
|
|
const matcherId = this.linkifier.registerLinkMatcher(regex, handler, options);
|
|
this.refresh(0, this.rows - 1);
|
|
return matcherId;
|
|
}
|
|
|
|
/**
|
|
* Deregisters a link matcher if it has been registered.
|
|
* @param matcherId The link matcher's ID (returned after register)
|
|
*/
|
|
public deregisterLinkMatcher(matcherId: number): void {
|
|
if (this.linkifier.deregisterLinkMatcher(matcherId)) {
|
|
this.refresh(0, this.rows - 1);
|
|
}
|
|
}
|
|
|
|
public registerCharacterJoiner(handler: CharacterJoinerHandler): number {
|
|
const joinerId = this._renderService.registerCharacterJoiner(handler);
|
|
this.refresh(0, this.rows - 1);
|
|
return joinerId;
|
|
}
|
|
|
|
public deregisterCharacterJoiner(joinerId: number): void {
|
|
if (this._renderService.deregisterCharacterJoiner(joinerId)) {
|
|
this.refresh(0, this.rows - 1);
|
|
}
|
|
}
|
|
|
|
public get markers(): IMarker[] {
|
|
return this.buffer.markers;
|
|
}
|
|
|
|
public addMarker(cursorYOffset: number): IMarker {
|
|
// Disallow markers on the alt buffer
|
|
if (this.buffer !== this.buffers.normal) {
|
|
return;
|
|
}
|
|
|
|
return this.buffer.addMarker(this.buffer.ybase + this.buffer.y + cursorYOffset);
|
|
}
|
|
|
|
/**
|
|
* Gets whether the terminal has an active selection.
|
|
*/
|
|
public hasSelection(): boolean {
|
|
return this.selectionManager ? this.selectionManager.hasSelection : false;
|
|
}
|
|
|
|
/**
|
|
* Selects text within the terminal.
|
|
* @param column The column the selection starts at..
|
|
* @param row The row the selection starts at.
|
|
* @param length The length of the selection.
|
|
*/
|
|
public select(column: number, row: number, length: number): void {
|
|
this.selectionManager.setSelection(column, row, length);
|
|
}
|
|
|
|
/**
|
|
* Gets the terminal's current selection, this is useful for implementing copy
|
|
* behavior outside of xterm.js.
|
|
*/
|
|
public getSelection(): string {
|
|
return this.selectionManager ? this.selectionManager.selectionText : '';
|
|
}
|
|
|
|
public getSelectionPosition(): ISelectionPosition | undefined {
|
|
if (!this.selectionManager.hasSelection) {
|
|
return undefined;
|
|
}
|
|
|
|
return {
|
|
startColumn: this.selectionManager.selectionStart[0],
|
|
startRow: this.selectionManager.selectionStart[1],
|
|
endColumn: this.selectionManager.selectionEnd[0],
|
|
endRow: this.selectionManager.selectionEnd[1]
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Clears the current terminal selection.
|
|
*/
|
|
public clearSelection(): void {
|
|
if (this.selectionManager) {
|
|
this.selectionManager.clearSelection();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Selects all text within the terminal.
|
|
*/
|
|
public selectAll(): void {
|
|
if (this.selectionManager) {
|
|
this.selectionManager.selectAll();
|
|
}
|
|
}
|
|
|
|
public selectLines(start: number, end: number): void {
|
|
if (this.selectionManager) {
|
|
this.selectionManager.selectLines(start, end);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handle a keydown event
|
|
* Key Resources:
|
|
* - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent
|
|
* @param ev The keydown event to be handled.
|
|
*/
|
|
protected _keyDown(event: KeyboardEvent): boolean {
|
|
if (this._customKeyEventHandler && this._customKeyEventHandler(event) === false) {
|
|
return false;
|
|
}
|
|
|
|
if (!this._compositionHelper.keydown(event)) {
|
|
if (this.buffer.ybase !== this.buffer.ydisp) {
|
|
this.scrollToBottom();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const result = evaluateKeyboardEvent(event, this.applicationCursor, this.browser.isMac, this.options.macOptionIsMeta);
|
|
|
|
this.updateCursorStyle(event);
|
|
|
|
// if (result.key === C0.DC3) { // XOFF
|
|
// this._writeStopped = true;
|
|
// } else if (result.key === C0.DC1) { // XON
|
|
// this._writeStopped = false;
|
|
// }
|
|
|
|
if (result.type === KeyboardResultType.PAGE_DOWN || result.type === KeyboardResultType.PAGE_UP) {
|
|
const scrollCount = this.rows - 1;
|
|
this.scrollLines(result.type === KeyboardResultType.PAGE_UP ? -scrollCount : scrollCount);
|
|
return this.cancel(event, true);
|
|
}
|
|
|
|
if (result.type === KeyboardResultType.SELECT_ALL) {
|
|
this.selectAll();
|
|
}
|
|
|
|
if (this._isThirdLevelShift(this.browser, event)) {
|
|
return true;
|
|
}
|
|
|
|
if (result.cancel) {
|
|
// The event is canceled at the end already, is this necessary?
|
|
this.cancel(event, true);
|
|
}
|
|
|
|
if (!result.key) {
|
|
return true;
|
|
}
|
|
|
|
this._onKey.fire({ key: result.key, domEvent: event });
|
|
this.showCursor();
|
|
this._coreService.triggerDataEvent(result.key, true);
|
|
|
|
return this.cancel(event, true);
|
|
}
|
|
|
|
private _isThirdLevelShift(browser: IBrowser, ev: IKeyboardEvent): boolean {
|
|
const thirdLevelKey =
|
|
(browser.isMac && !this.options.macOptionIsMeta && ev.altKey && !ev.ctrlKey && !ev.metaKey) ||
|
|
(browser.isMSWindows && ev.altKey && ev.ctrlKey && !ev.metaKey);
|
|
|
|
if (ev.type === 'keypress') {
|
|
return thirdLevelKey;
|
|
}
|
|
|
|
// Don't invoke for arrows, pageDown, home, backspace, etc. (on non-keypress events)
|
|
return thirdLevelKey && (!ev.keyCode || ev.keyCode > 47);
|
|
}
|
|
|
|
/**
|
|
* Set the G level of the terminal
|
|
* @param g
|
|
*/
|
|
public setgLevel(g: number): void {
|
|
this.glevel = g;
|
|
this.charset = this.charsets[g];
|
|
}
|
|
|
|
/**
|
|
* Set the charset for the given G level of the terminal
|
|
* @param g
|
|
* @param charset
|
|
*/
|
|
public setgCharset(g: number, charset: ICharset): void {
|
|
this.charsets[g] = charset;
|
|
if (this.glevel === g) {
|
|
this.charset = charset;
|
|
}
|
|
}
|
|
|
|
protected _keyUp(ev: KeyboardEvent): void {
|
|
this.updateCursorStyle(ev);
|
|
}
|
|
|
|
/**
|
|
* Handle a keypress event.
|
|
* Key Resources:
|
|
* - https://developer.mozilla.org/en-US/docs/DOM/KeyboardEvent
|
|
* @param ev The keypress event to be handled.
|
|
*/
|
|
protected _keyPress(ev: KeyboardEvent): boolean {
|
|
let key;
|
|
|
|
if (this._customKeyEventHandler && this._customKeyEventHandler(ev) === false) {
|
|
return false;
|
|
}
|
|
|
|
this.cancel(ev);
|
|
|
|
if (ev.charCode) {
|
|
key = ev.charCode;
|
|
} else if (ev.which === null || ev.which === undefined) {
|
|
key = ev.keyCode;
|
|
} else if (ev.which !== 0 && ev.charCode !== 0) {
|
|
key = ev.which;
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
if (!key || (
|
|
(ev.altKey || ev.ctrlKey || ev.metaKey) && !this._isThirdLevelShift(this.browser, ev)
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
key = String.fromCharCode(key);
|
|
|
|
this._onKey.fire({ key, domEvent: ev });
|
|
this.showCursor();
|
|
this._coreService.triggerDataEvent(key, true);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Ring the bell.
|
|
* Note: We could do sweet things with webaudio here
|
|
*/
|
|
public bell(): void {
|
|
if (this._soundBell()) {
|
|
this.soundManager.playBellSound();
|
|
}
|
|
|
|
if (this._visualBell()) {
|
|
this.element.classList.add('visual-bell-active');
|
|
clearTimeout(this._visualBellTimer);
|
|
this._visualBellTimer = window.setTimeout(() => {
|
|
this.element.classList.remove('visual-bell-active');
|
|
}, 200);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Log the current state to the console.
|
|
*/
|
|
public log(text: string, data?: any): void {
|
|
if (!this.options.debug) return;
|
|
if (!this._context.console || !this._context.console.log) return;
|
|
this._context.console.log(text, data);
|
|
}
|
|
|
|
/**
|
|
* Log the current state as error to the console.
|
|
*/
|
|
public error(text: string, data?: any): void {
|
|
if (!this.options.debug) return;
|
|
if (!this._context.console || !this._context.console.error) return;
|
|
this._context.console.error(text, data);
|
|
}
|
|
|
|
/**
|
|
* Resizes the terminal.
|
|
*
|
|
* @param x The number of columns to resize to.
|
|
* @param y The number of rows to resize to.
|
|
*/
|
|
public resize(x: number, y: number): void {
|
|
if (isNaN(x) || isNaN(y)) {
|
|
return;
|
|
}
|
|
|
|
if (x === this.cols && y === this.rows) {
|
|
// Check if we still need to measure the char size (fixes #785).
|
|
if (this._charSizeService && !this._charSizeService.hasValidSize) {
|
|
this._charSizeService.measure();
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (x < MINIMUM_COLS) x = MINIMUM_COLS;
|
|
if (y < MINIMUM_ROWS) y = MINIMUM_ROWS;
|
|
|
|
this.buffers.resize(x, y);
|
|
|
|
this._bufferService.resize(x, y);
|
|
this.buffers.setupTabStops(this.cols);
|
|
|
|
if (this._charSizeService) {
|
|
this._charSizeService.measure();
|
|
}
|
|
|
|
this.refresh(0, this.rows - 1);
|
|
this._onResize.fire({ cols: x, rows: y });
|
|
}
|
|
|
|
/**
|
|
* Updates the range of rows to refresh
|
|
* @param y The number of rows to refresh next.
|
|
*/
|
|
public updateRange(y: number): void {
|
|
if (y < this._refreshStart) this._refreshStart = y;
|
|
if (y > this._refreshEnd) this._refreshEnd = y;
|
|
// if (y > this.refreshEnd) {
|
|
// this.refreshEnd = y;
|
|
// if (y > this.rows - 1) {
|
|
// this.refreshEnd = this.rows - 1;
|
|
// }
|
|
// }
|
|
}
|
|
|
|
/**
|
|
* Set the range of refreshing to the maximum value
|
|
*/
|
|
public maxRange(): void {
|
|
this._refreshStart = 0;
|
|
this._refreshEnd = this.rows - 1;
|
|
}
|
|
|
|
/**
|
|
* Clear the entire buffer, making the prompt line the new first line.
|
|
*/
|
|
public clear(): void {
|
|
if (this.buffer.ybase === 0 && this.buffer.y === 0) {
|
|
// Don't clear if it's already clear
|
|
return;
|
|
}
|
|
this.buffer.lines.set(0, this.buffer.lines.get(this.buffer.ybase + this.buffer.y));
|
|
this.buffer.lines.length = 1;
|
|
this.buffer.ydisp = 0;
|
|
this.buffer.ybase = 0;
|
|
this.buffer.y = 0;
|
|
for (let i = 1; i < this.rows; i++) {
|
|
this.buffer.lines.push(this.buffer.getBlankLine(DEFAULT_ATTR_DATA));
|
|
}
|
|
this.refresh(0, this.rows - 1);
|
|
this._onScroll.fire(this.buffer.ydisp);
|
|
}
|
|
|
|
/**
|
|
* Evaluate if the current terminal is the given argument.
|
|
* @param term The terminal name to evaluate
|
|
*/
|
|
public is(term: string): boolean {
|
|
return (this.options.termName + '').indexOf(term) === 0;
|
|
}
|
|
|
|
/**
|
|
* Emit the data event and populate the given data.
|
|
* @param data The data to populate in the event.
|
|
*/
|
|
// public handler(data: string): void {
|
|
// // Prevents all events to pty process if stdin is disabled
|
|
// if (this.options.disableStdin) {
|
|
// return;
|
|
// }
|
|
|
|
// // Clear the selection if the selection manager is available and has an active selection
|
|
// if (this.selectionManager && this.selectionManager.hasSelection) {
|
|
// this.selectionManager.clearSelection();
|
|
// }
|
|
|
|
// // Input is being sent to the terminal, the terminal should focus the prompt.
|
|
// if (this.buffer.ybase !== this.buffer.ydisp) {
|
|
// this.scrollToBottom();
|
|
// }
|
|
// this._onData.fire(data);
|
|
// }
|
|
|
|
/**
|
|
* Emit the 'title' event and populate the given title.
|
|
* @param title The title to populate in the event.
|
|
*/
|
|
public handleTitle(title: string): void {
|
|
this._onTitleChange.fire(title);
|
|
}
|
|
|
|
/**
|
|
* ESC
|
|
*/
|
|
|
|
/**
|
|
* ESC D Index (IND is 0x84).
|
|
*/
|
|
public index(): void {
|
|
this.buffer.y++;
|
|
if (this.buffer.y > this.buffer.scrollBottom) {
|
|
this.buffer.y--;
|
|
this.scroll();
|
|
}
|
|
// If the end of the line is hit, prevent this action from wrapping around to the next line.
|
|
if (this.buffer.x >= this.cols) {
|
|
this.buffer.x--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ESC M Reverse Index (RI is 0x8d).
|
|
*
|
|
* Move the cursor up one row, inserting a new blank line if necessary.
|
|
*/
|
|
public reverseIndex(): void {
|
|
if (this.buffer.y === this.buffer.scrollTop) {
|
|
// possibly move the code below to term.reverseScroll();
|
|
// test: echo -ne '\e[1;1H\e[44m\eM\e[0m'
|
|
// blankLine(true) is xterm/linux behavior
|
|
const scrollRegionHeight = this.buffer.scrollBottom - this.buffer.scrollTop;
|
|
this.buffer.lines.shiftElements(this.buffer.y + this.buffer.ybase, scrollRegionHeight, 1);
|
|
this.buffer.lines.set(this.buffer.y + this.buffer.ybase, this.buffer.getBlankLine(this.eraseAttrData()));
|
|
this.updateRange(this.buffer.scrollTop);
|
|
this.updateRange(this.buffer.scrollBottom);
|
|
} else {
|
|
this.buffer.y--;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ESC c Full Reset (RIS).
|
|
*/
|
|
public reset(): void {
|
|
/**
|
|
* Since _setup handles a full terminal creation, we have to carry forward
|
|
* a few things that should not reset.
|
|
*/
|
|
this.options.rows = this.rows;
|
|
this.options.cols = this.cols;
|
|
const customKeyEventHandler = this._customKeyEventHandler;
|
|
const inputHandler = this._inputHandler;
|
|
const cursorState = this.cursorState;
|
|
const writeBuffer = this.writeBuffer;
|
|
const writeBufferUtf8 = this.writeBufferUtf8;
|
|
const writeInProgress = this._writeInProgress;
|
|
const xoffSentToCatchUp = this._xoffSentToCatchUp;
|
|
const userScrolling = this._userScrolling;
|
|
|
|
this._setup();
|
|
this._bufferService.reset();
|
|
|
|
// reattach
|
|
this._customKeyEventHandler = customKeyEventHandler;
|
|
this._inputHandler = inputHandler;
|
|
this.cursorState = cursorState;
|
|
this.writeBuffer = writeBuffer;
|
|
this.writeBufferUtf8 = writeBufferUtf8;
|
|
this._writeInProgress = writeInProgress;
|
|
this._xoffSentToCatchUp = xoffSentToCatchUp;
|
|
this._userScrolling = userScrolling;
|
|
|
|
// do a full screen refresh
|
|
this.refresh(0, this.rows - 1);
|
|
if (this.viewport) {
|
|
this.viewport.syncScrollArea();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* ESC H Tab Set (HTS is 0x88).
|
|
*/
|
|
public tabSet(): void {
|
|
this.buffer.tabs[this.buffer.x] = true;
|
|
}
|
|
|
|
// TODO: Remove cancel function and cancelEvents option
|
|
public cancel(ev: Event, force?: boolean): boolean {
|
|
if (!this.options.cancelEvents && !force) {
|
|
return;
|
|
}
|
|
ev.preventDefault();
|
|
ev.stopPropagation();
|
|
return false;
|
|
}
|
|
|
|
private _visualBell(): boolean {
|
|
return false;
|
|
// return this.options.bellStyle === 'visual' ||
|
|
// this.options.bellStyle === 'both';
|
|
}
|
|
|
|
private _soundBell(): boolean {
|
|
return this.options.bellStyle === 'sound';
|
|
// return this.options.bellStyle === 'sound' ||
|
|
// this.options.bellStyle === 'both';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helpers
|
|
*/
|
|
|
|
function wasModifierKeyOnlyEvent(ev: KeyboardEvent): boolean {
|
|
return ev.keyCode === 16 || // Shift
|
|
ev.keyCode === 17 || // Ctrl
|
|
ev.keyCode === 18; // Alt
|
|
}
|