Changed javascript to be in its own file. Began (messy) setup for terminal.

1 files changed, 1009 insertions, 0 deletions

diff --git a/node_modules/xterm/src/browser/services/SelectionService.ts b/node_modules/xterm/src/browser/services/SelectionService.ts
new file mode 100644
index 0000000..1ea2395
--- /dev/null
+++ b/node_modules/xterm/src/browser/services/SelectionService.ts
@@ -0,0 +1,1009 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { ISelectionRedrawRequestEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
+import { IBuffer } from 'common/buffer/Types';
+import { IBufferLine, IDisposable } from 'common/Types';
+import * as Browser from 'common/Platform';
+import { SelectionModel } from 'browser/selection/SelectionModel';
+import { CellData } from 'common/buffer/CellData';
+import { EventEmitter, IEvent } from 'common/EventEmitter';
+import { IMouseService, ISelectionService, IRenderService } from 'browser/services/Services';
+import { ILinkifier2 } from 'browser/Types';
+import { IBufferService, IOptionsService, ICoreService } from 'common/services/Services';
+import { getCoordsRelativeToElement } from 'browser/input/Mouse';
+import { moveToCellSequence } from 'browser/input/MoveToCell';
+import { Disposable } from 'common/Lifecycle';
+import { getRangeLength } from 'common/buffer/BufferRange';
+
+/**
+ * The number of pixels the mouse needs to be above or below the viewport in
+ * order to scroll at the maximum speed.
+ */
+const DRAG_SCROLL_MAX_THRESHOLD = 50;
+
+/**
+ * The maximum scrolling speed
+ */
+const DRAG_SCROLL_MAX_SPEED = 15;
+
+/**
+ * The number of milliseconds between drag scroll updates.
+ */
+const DRAG_SCROLL_INTERVAL = 50;
+
+/**
+ * The maximum amount of time that can have elapsed for an alt click to move the
+ * cursor.
+ */
+const ALT_CLICK_MOVE_CURSOR_TIME = 500;
+
+const NON_BREAKING_SPACE_CHAR = String.fromCharCode(160);
+const ALL_NON_BREAKING_SPACE_REGEX = new RegExp(NON_BREAKING_SPACE_CHAR, 'g');
+
+/**
+ * Represents a position of a word on a line.
+ */
+interface IWordPosition {
+  start: number;
+  length: number;
+}
+
+/**
+ * A selection mode, this drives how the selection behaves on mouse move.
+ */
+export const enum SelectionMode {
+  NORMAL,
+  WORD,
+  LINE,
+  COLUMN
+}
+
+/**
+ * A class that manages the selection of the terminal. With help from
+ * SelectionModel, SelectionService handles with all logic associated with
+ * dealing with the selection, including handling mouse interaction, wide
+ * characters and fetching the actual text within the selection. Rendering is
+ * not handled by the SelectionService but the onRedrawRequest event is fired
+ * when the selection is ready to be redrawn (on an animation frame).
+ */
+export class SelectionService extends Disposable implements ISelectionService {
+  public serviceBrand: undefined;
+
+  protected _model: SelectionModel;
+
+  /**
+   * The amount to scroll every drag scroll update (depends on how far the mouse
+   * drag is above or below the terminal).
+   */
+  private _dragScrollAmount: number = 0;
+
+  /**
+   * The current selection mode.
+   */
+  protected _activeSelectionMode: SelectionMode;
+
+  /**
+   * A setInterval timer that is active while the mouse is down whose callback
+   * scrolls the viewport when necessary.
+   */
+  private _dragScrollIntervalTimer: number | undefined;
+
+  /**
+   * The animation frame ID used for refreshing the selection.
+   */
+  private _refreshAnimationFrame: number | undefined;
+
+  /**
+   * Whether selection is enabled.
+   */
+  private _enabled = true;
+
+  private _mouseMoveListener: EventListener;
+  private _mouseUpListener: EventListener;
+  private _trimListener: IDisposable;
+  private _workCell: CellData = new CellData();
+
+  private _mouseDownTimeStamp: number = 0;
+  private _oldHasSelection: boolean = false;
+  private _oldSelectionStart: [number, number] | undefined = undefined;
+  private _oldSelectionEnd: [number, number] | undefined = undefined;
+
+  private _onLinuxMouseSelection = this.register(new EventEmitter<string>());
+  public get onLinuxMouseSelection(): IEvent<string> { return this._onLinuxMouseSelection.event; }
+  private _onRedrawRequest = this.register(new EventEmitter<ISelectionRedrawRequestEvent>());
+  public get onRequestRedraw(): IEvent<ISelectionRedrawRequestEvent> { return this._onRedrawRequest.event; }
+  private _onSelectionChange = this.register(new EventEmitter<void>());
+  public get onSelectionChange(): IEvent<void> { return this._onSelectionChange.event; }
+  private _onRequestScrollLines = this.register(new EventEmitter<ISelectionRequestScrollLinesEvent>());
+  public get onRequestScrollLines(): IEvent<ISelectionRequestScrollLinesEvent> { return this._onRequestScrollLines.event; }
+
+  constructor(
+    private readonly _element: HTMLElement,
+    private readonly _screenElement: HTMLElement,
+    private readonly _linkifier: ILinkifier2,
+    @IBufferService private readonly _bufferService: IBufferService,
+    @ICoreService private readonly _coreService: ICoreService,
+    @IMouseService private readonly _mouseService: IMouseService,
+    @IOptionsService private readonly _optionsService: IOptionsService,
+    @IRenderService private readonly _renderService: IRenderService
+  ) {
+    super();
+
+    // Init listeners
+    this._mouseMoveListener = event => this._onMouseMove(event as MouseEvent);
+    this._mouseUpListener = event => this._onMouseUp(event as MouseEvent);
+    this._coreService.onUserInput(() => {
+      if (this.hasSelection) {
+        this.clearSelection();
+      }
+    });
+    this._trimListener = this._bufferService.buffer.lines.onTrim(amount => this._onTrim(amount));
+    this.register(this._bufferService.buffers.onBufferActivate(e => this._onBufferActivate(e)));
+
+    this.enable();
+
+    this._model = new SelectionModel(this._bufferService);
+    this._activeSelectionMode = SelectionMode.NORMAL;
+  }
+
+  public dispose(): void {
+    this._removeMouseDownListeners();
+  }
+
+  public reset(): void {
+    this.clearSelection();
+  }
+
+  /**
+   * Disables the selection manager. This is useful for when terminal mouse
+   * are enabled.
+   */
+  public disable(): void {
+    this.clearSelection();
+    this._enabled = false;
+  }
+
+  /**
+   * Enable the selection manager.
+   */
+  public enable(): void {
+    this._enabled = true;
+  }
+
+  public get selectionStart(): [number, number] | undefined { return this._model.finalSelectionStart; }
+  public get selectionEnd(): [number, number] | undefined { return this._model.finalSelectionEnd; }
+
+  /**
+   * Gets whether there is an active text selection.
+   */
+  public get hasSelection(): boolean {
+    const start = this._model.finalSelectionStart;
+    const end = this._model.finalSelectionEnd;
+    if (!start || !end) {
+      return false;
+    }
+    return start[0] !== end[0] || start[1] !== end[1];
+  }
+
+  /**
+   * Gets the text currently selected.
+   */
+  public get selectionText(): string {
+    const start = this._model.finalSelectionStart;
+    const end = this._model.finalSelectionEnd;
+    if (!start || !end) {
+      return '';
+    }
+
+    const buffer = this._bufferService.buffer;
+    const result: string[] = [];
+
+    if (this._activeSelectionMode === SelectionMode.COLUMN) {
+      // Ignore zero width selections
+      if (start[0] === end[0]) {
+        return '';
+      }
+
+      for (let i = start[1]; i <= end[1]; i++) {
+        const lineText = buffer.translateBufferLineToString(i, true, start[0], end[0]);
+        result.push(lineText);
+      }
+    } else {
+      // Get first row
+      const startRowEndCol = start[1] === end[1] ? end[0] : undefined;
+      result.push(buffer.translateBufferLineToString(start[1], true, start[0], startRowEndCol));
+
+      // Get middle rows
+      for (let i = start[1] + 1; i <= end[1] - 1; i++) {
+        const bufferLine = buffer.lines.get(i);
+        const lineText = buffer.translateBufferLineToString(i, true);
+        if (bufferLine?.isWrapped) {
+          result[result.length - 1] += lineText;
+        } else {
+          result.push(lineText);
+        }
+      }
+
+      // Get final row
+      if (start[1] !== end[1]) {
+        const bufferLine = buffer.lines.get(end[1]);
+        const lineText = buffer.translateBufferLineToString(end[1], true, 0, end[0]);
+        if (bufferLine && bufferLine!.isWrapped) {
+          result[result.length - 1] += lineText;
+        } else {
+          result.push(lineText);
+        }
+      }
+    }
+
+    // Format string by replacing non-breaking space chars with regular spaces
+    // and joining the array into a multi-line string.
+    const formattedResult = result.map(line => {
+      return line.replace(ALL_NON_BREAKING_SPACE_REGEX, ' ');
+    }).join(Browser.isWindows ? '\r\n' : '\n');
+
+    return formattedResult;
+  }
+
+  /**
+   * Clears the current terminal selection.
+   */
+  public clearSelection(): void {
+    this._model.clearSelection();
+    this._removeMouseDownListeners();
+    this.refresh();
+    this._onSelectionChange.fire();
+  }
+
+  /**
+   * Queues a refresh, redrawing the selection on the next opportunity.
+   * @param isLinuxMouseSelection Whether the selection should be registered as a new
+   * selection on Linux.
+   */
+  public refresh(isLinuxMouseSelection?: boolean): void {
+    // Queue the refresh for the renderer
+    if (!this._refreshAnimationFrame) {
+      this._refreshAnimationFrame = window.requestAnimationFrame(() => this._refresh());
+    }
+
+    // If the platform is Linux and the refresh call comes from a mouse event,
+    // we need to update the selection for middle click to paste selection.
+    if (Browser.isLinux && isLinuxMouseSelection) {
+      const selectionText = this.selectionText;
+      if (selectionText.length) {
+        this._onLinuxMouseSelection.fire(this.selectionText);
+      }
+    }
+  }
+
+  /**
+   * Fires the refresh event, causing consumers to pick it up and redraw the
+   * selection state.
+   */
+  private _refresh(): void {
+    this._refreshAnimationFrame = undefined;
+    this._onRedrawRequest.fire({
+      start: this._model.finalSelectionStart,
+      end: this._model.finalSelectionEnd,
+      columnSelectMode: this._activeSelectionMode === SelectionMode.COLUMN
+    });
+  }
+
+  /**
+   * Checks if the current click was inside the current selection
+   * @param event The mouse event
+   */
+  private _isClickInSelection(event: MouseEvent): boolean {
+    const coords = this._getMouseBufferCoords(event);
+    const start = this._model.finalSelectionStart;
+    const end = this._model.finalSelectionEnd;
+
+    if (!start || !end || !coords) {
+      return false;
+    }
+
+    return this._areCoordsInSelection(coords, start, end);
+  }
+
+  protected _areCoordsInSelection(coords: [number, number], start: [number, number], end: [number, number]): boolean {
+    return (coords[1] > start[1] && coords[1] < end[1]) ||
+        (start[1] === end[1] && coords[1] === start[1] && coords[0] >= start[0] && coords[0] < end[0]) ||
+        (start[1] < end[1] && coords[1] === end[1] && coords[0] < end[0]) ||
+        (start[1] < end[1] && coords[1] === start[1] && coords[0] >= start[0]);
+  }
+
+  /**
+   * Selects word at the current mouse event coordinates.
+   * @param event The mouse event.
+   */
+  private _selectWordAtCursor(event: MouseEvent, allowWhitespaceOnlySelection: boolean): boolean {
+    // Check if there is a link under the cursor first and select that if so
+    const range = this._linkifier.currentLink?.link?.range;
+    if (range) {
+      this._model.selectionStart = [range.start.x - 1, range.start.y - 1];
+      this._model.selectionStartLength = getRangeLength(range, this._bufferService.cols);
+      this._model.selectionEnd = undefined;
+      return true;
+    }
+
+    const coords = this._getMouseBufferCoords(event);
+    if (coords) {
+      this._selectWordAt(coords, allowWhitespaceOnlySelection);
+      this._model.selectionEnd = undefined;
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Selects all text within the terminal.
+   */
+  public selectAll(): void {
+    this._model.isSelectAllActive = true;
+    this.refresh();
+    this._onSelectionChange.fire();
+  }
+
+  public selectLines(start: number, end: number): void {
+    this._model.clearSelection();
+    start = Math.max(start, 0);
+    end = Math.min(end, this._bufferService.buffer.lines.length - 1);
+    this._model.selectionStart = [0, start];
+    this._model.selectionEnd = [this._bufferService.cols, end];
+    this.refresh();
+    this._onSelectionChange.fire();
+  }
+
+  /**
+   * Handle the buffer being trimmed, adjust the selection position.
+   * @param amount The amount the buffer is being trimmed.
+   */
+  private _onTrim(amount: number): void {
+    const needsRefresh = this._model.onTrim(amount);
+    if (needsRefresh) {
+      this.refresh();
+    }
+  }
+
+  /**
+   * Gets the 0-based [x, y] buffer coordinates of the current mouse event.
+   * @param event The mouse event.
+   */
+  private _getMouseBufferCoords(event: MouseEvent): [number, number] | undefined {
+    const coords = this._mouseService.getCoords(event, this._screenElement, this._bufferService.cols, this._bufferService.rows, true);
+    if (!coords) {
+      return undefined;
+    }
+
+    // Convert to 0-based
+    coords[0]--;
+    coords[1]--;
+
+    // Convert viewport coords to buffer coords
+    coords[1] += this._bufferService.buffer.ydisp;
+    return coords;
+  }
+
+  /**
+   * Gets the amount the viewport should be scrolled based on how far out of the
+   * terminal the mouse is.
+   * @param event The mouse event.
+   */
+  private _getMouseEventScrollAmount(event: MouseEvent): number {
+    let offset = getCoordsRelativeToElement(event, this._screenElement)[1];
+    const terminalHeight = this._renderService.dimensions.canvasHeight;
+    if (offset >= 0 && offset <= terminalHeight) {
+      return 0;
+    }
+    if (offset > terminalHeight) {
+      offset -= terminalHeight;
+    }
+
+    offset = Math.min(Math.max(offset, -DRAG_SCROLL_MAX_THRESHOLD), DRAG_SCROLL_MAX_THRESHOLD);
+    offset /= DRAG_SCROLL_MAX_THRESHOLD;
+    return (offset / Math.abs(offset)) + Math.round(offset * (DRAG_SCROLL_MAX_SPEED - 1));
+  }
+
+  /**
+   * Returns whether the selection manager should force selection, regardless of
+   * whether the terminal is in mouse events mode.
+   * @param event The mouse event.
+   */
+  public shouldForceSelection(event: MouseEvent): boolean {
+    if (Browser.isMac) {
+      return event.altKey && this._optionsService.rawOptions.macOptionClickForcesSelection;
+    }
+
+    return event.shiftKey;
+  }
+
+  /**
+   * Handles te mousedown event, setting up for a new selection.
+   * @param event The mousedown event.
+   */
+  public onMouseDown(event: MouseEvent): void {
+    this._mouseDownTimeStamp = event.timeStamp;
+    // If we have selection, we want the context menu on right click even if the
+    // terminal is in mouse mode.
+    if (event.button === 2 && this.hasSelection) {
+      return;
+    }
+
+    // Only action the primary button
+    if (event.button !== 0) {
+      return;
+    }
+
+    // Allow selection when using a specific modifier key, even when disabled
+    if (!this._enabled) {
+      if (!this.shouldForceSelection(event)) {
+        return;
+      }
+
+      // Don't send the mouse down event to the current process, we want to select
+      event.stopPropagation();
+    }
+
+    // Tell the browser not to start a regular selection
+    event.preventDefault();
+
+    // Reset drag scroll state
+    this._dragScrollAmount = 0;
+
+    if (this._enabled && event.shiftKey) {
+      this._onIncrementalClick(event);
+    } else {
+      if (event.detail === 1) {
+        this._onSingleClick(event);
+      } else if (event.detail === 2) {
+        this._onDoubleClick(event);
+      } else if (event.detail === 3) {
+        this._onTripleClick(event);
+      }
+    }
+
+    this._addMouseDownListeners();
+    this.refresh(true);
+  }
+
+  /**
+   * Adds listeners when mousedown is triggered.
+   */
+  private _addMouseDownListeners(): void {
+    // Listen on the document so that dragging outside of viewport works
+    if (this._screenElement.ownerDocument) {
+      this._screenElement.ownerDocument.addEventListener('mousemove', this._mouseMoveListener);
+      this._screenElement.ownerDocument.addEventListener('mouseup', this._mouseUpListener);
+    }
+    this._dragScrollIntervalTimer = window.setInterval(() => this._dragScroll(), DRAG_SCROLL_INTERVAL);
+  }
+
+  /**
+   * Removes the listeners that are registered when mousedown is triggered.
+   */
+  private _removeMouseDownListeners(): void {
+    if (this._screenElement.ownerDocument) {
+      this._screenElement.ownerDocument.removeEventListener('mousemove', this._mouseMoveListener);
+      this._screenElement.ownerDocument.removeEventListener('mouseup', this._mouseUpListener);
+    }
+    clearInterval(this._dragScrollIntervalTimer);
+    this._dragScrollIntervalTimer = undefined;
+  }
+
+  /**
+   * Performs an incremental click, setting the selection end position to the mouse
+   * position.
+   * @param event The mouse event.
+   */
+  private _onIncrementalClick(event: MouseEvent): void {
+    if (this._model.selectionStart) {
+      this._model.selectionEnd = this._getMouseBufferCoords(event);
+    }
+  }
+
+  /**
+   * Performs a single click, resetting relevant state and setting the selection
+   * start position.
+   * @param event The mouse event.
+   */
+  private _onSingleClick(event: MouseEvent): void {
+    this._model.selectionStartLength = 0;
+    this._model.isSelectAllActive = false;
+    this._activeSelectionMode = this.shouldColumnSelect(event) ? SelectionMode.COLUMN : SelectionMode.NORMAL;
+
+    // Initialize the new selection
+    this._model.selectionStart = this._getMouseBufferCoords(event);
+    if (!this._model.selectionStart) {
+      return;
+    }
+    this._model.selectionEnd = undefined;
+
+    // Ensure the line exists
+    const line = this._bufferService.buffer.lines.get(this._model.selectionStart[1]);
+    if (!line) {
+      return;
+    }
+
+    // Return early if the click event is not in the buffer (eg. in scroll bar)
+    if (line.length === this._model.selectionStart[0]) {
+      return;
+    }
+
+    // If the mouse is over the second half of a wide character, adjust the
+    // selection to cover the whole character
+    if (line.hasWidth(this._model.selectionStart[0]) === 0) {
+      this._model.selectionStart[0]++;
+    }
+  }
+
+  /**
+   * Performs a double click, selecting the current word.
+   * @param event The mouse event.
+   */
+  private _onDoubleClick(event: MouseEvent): void {
+    if (this._selectWordAtCursor(event, true)) {
+      this._activeSelectionMode = SelectionMode.WORD;
+    }
+  }
+
+  /**
+   * Performs a triple click, selecting the current line and activating line
+   * select mode.
+   * @param event The mouse event.
+   */
+  private _onTripleClick(event: MouseEvent): void {
+    const coords = this._getMouseBufferCoords(event);
+    if (coords) {
+      this._activeSelectionMode = SelectionMode.LINE;
+      this._selectLineAt(coords[1]);
+    }
+  }
+
+  /**
+   * Returns whether the selection manager should operate in column select mode
+   * @param event the mouse or keyboard event
+   */
+  public shouldColumnSelect(event: KeyboardEvent | MouseEvent): boolean {
+    return event.altKey && !(Browser.isMac && this._optionsService.rawOptions.macOptionClickForcesSelection);
+  }
+
+  /**
+   * Handles the mousemove event when the mouse button is down, recording the
+   * end of the selection and refreshing the selection.
+   * @param event The mousemove event.
+   */
+  private _onMouseMove(event: MouseEvent): void {
+    // If the mousemove listener is active it means that a selection is
+    // currently being made, we should stop propagation to prevent mouse events
+    // to be sent to the pty.
+    event.stopImmediatePropagation();
+
+    // Do nothing if there is no selection start, this can happen if the first
+    // click in the terminal is an incremental click
+    if (!this._model.selectionStart) {
+      return;
+    }
+
+    // Record the previous position so we know whether to redraw the selection
+    // at the end.
+    const previousSelectionEnd = this._model.selectionEnd ? [this._model.selectionEnd[0], this._model.selectionEnd[1]] : null;
+
+    // Set the initial selection end based on the mouse coordinates
+    this._model.selectionEnd = this._getMouseBufferCoords(event);
+    if (!this._model.selectionEnd) {
+      this.refresh(true);
+      return;
+    }
+
+    // Select the entire line if line select mode is active.
+    if (this._activeSelectionMode === SelectionMode.LINE) {
+      if (this._model.selectionEnd[1] < this._model.selectionStart[1]) {
+        this._model.selectionEnd[0] = 0;
+      } else {
+        this._model.selectionEnd[0] = this._bufferService.cols;
+      }
+    } else if (this._activeSelectionMode === SelectionMode.WORD) {
+      this._selectToWordAt(this._model.selectionEnd);
+    }
+
+    // Determine the amount of scrolling that will happen.
+    this._dragScrollAmount = this._getMouseEventScrollAmount(event);
+
+    // If the cursor was above or below the viewport, make sure it's at the
+    // start or end of the viewport respectively. This should only happen when
+    // NOT in column select mode.
+    if (this._activeSelectionMode !== SelectionMode.COLUMN) {
+      if (this._dragScrollAmount > 0) {
+        this._model.selectionEnd[0] = this._bufferService.cols;
+      } else if (this._dragScrollAmount < 0) {
+        this._model.selectionEnd[0] = 0;
+      }
+    }
+
+    // If the character is a wide character include the cell to the right in the
+    // selection. Note that selections at the very end of the line will never
+    // have a character.
+    const buffer = this._bufferService.buffer;
+    if (this._model.selectionEnd[1] < buffer.lines.length) {
+      const line = buffer.lines.get(this._model.selectionEnd[1]);
+      if (line && line.hasWidth(this._model.selectionEnd[0]) === 0) {
+        this._model.selectionEnd[0]++;
+      }
+    }
+
+    // Only draw here if the selection changes.
+    if (!previousSelectionEnd ||
+      previousSelectionEnd[0] !== this._model.selectionEnd[0] ||
+      previousSelectionEnd[1] !== this._model.selectionEnd[1]) {
+      this.refresh(true);
+    }
+  }
+
+  /**
+   * The callback that occurs every DRAG_SCROLL_INTERVAL ms that does the
+   * scrolling of the viewport.
+   */
+  private _dragScroll(): void {
+    if (!this._model.selectionEnd || !this._model.selectionStart) {
+      return;
+    }
+    if (this._dragScrollAmount) {
+      this._onRequestScrollLines.fire({ amount: this._dragScrollAmount, suppressScrollEvent: false });
+      // Re-evaluate selection
+      // If the cursor was above or below the viewport, make sure it's at the
+      // start or end of the viewport respectively. This should only happen when
+      // NOT in column select mode.
+      const buffer = this._bufferService.buffer;
+      if (this._dragScrollAmount > 0) {
+        if (this._activeSelectionMode !== SelectionMode.COLUMN) {
+          this._model.selectionEnd[0] = this._bufferService.cols;
+        }
+        this._model.selectionEnd[1] = Math.min(buffer.ydisp + this._bufferService.rows, buffer.lines.length - 1);
+      } else {
+        if (this._activeSelectionMode !== SelectionMode.COLUMN) {
+          this._model.selectionEnd[0] = 0;
+        }
+        this._model.selectionEnd[1] = buffer.ydisp;
+      }
+      this.refresh();
+    }
+  }
+
+  /**
+   * Handles the mouseup event, removing the mousedown listeners.
+   * @param event The mouseup event.
+   */
+  private _onMouseUp(event: MouseEvent): void {
+    const timeElapsed = event.timeStamp - this._mouseDownTimeStamp;
+
+    this._removeMouseDownListeners();
+
+    if (this.selectionText.length <= 1 && timeElapsed < ALT_CLICK_MOVE_CURSOR_TIME && event.altKey && this._optionsService.getOption('altClickMovesCursor')) {
+      if (this._bufferService.buffer.ybase === this._bufferService.buffer.ydisp) {
+        const coordinates = this._mouseService.getCoords(
+          event,
+          this._element,
+          this._bufferService.cols,
+          this._bufferService.rows,
+          false
+        );
+        if (coordinates && coordinates[0] !== undefined && coordinates[1] !== undefined) {
+          const sequence = moveToCellSequence(coordinates[0] - 1, coordinates[1] - 1, this._bufferService, this._coreService.decPrivateModes.applicationCursorKeys);
+          this._coreService.triggerDataEvent(sequence, true);
+        }
+      }
+    } else {
+      this._fireEventIfSelectionChanged();
+    }
+  }
+
+  private _fireEventIfSelectionChanged(): void {
+    const start = this._model.finalSelectionStart;
+    const end = this._model.finalSelectionEnd;
+    const hasSelection = !!start && !!end && (start[0] !== end[0] || start[1] !== end[1]);
+
+    if (!hasSelection) {
+      if (this._oldHasSelection) {
+        this._fireOnSelectionChange(start, end, hasSelection);
+      }
+      return;
+    }
+
+    // Sanity check, these should not be undefined as there is a selection
+    if (!start || !end) {
+      return;
+    }
+
+    if (!this._oldSelectionStart || !this._oldSelectionEnd || (
+      start[0] !== this._oldSelectionStart[0] || start[1] !== this._oldSelectionStart[1] ||
+      end[0] !== this._oldSelectionEnd[0] || end[1] !== this._oldSelectionEnd[1])) {
+
+      this._fireOnSelectionChange(start, end, hasSelection);
+    }
+  }
+
+  private _fireOnSelectionChange(start: [number, number] | undefined, end: [number, number] | undefined, hasSelection: boolean): void {
+    this._oldSelectionStart = start;
+    this._oldSelectionEnd = end;
+    this._oldHasSelection = hasSelection;
+    this._onSelectionChange.fire();
+  }
+
+  private _onBufferActivate(e: {activeBuffer: IBuffer, inactiveBuffer: IBuffer}): void {
+    this.clearSelection();
+    // Only adjust the selection on trim, shiftElements is rarely used (only in
+    // reverseIndex) and delete in a splice is only ever used when the same
+    // number of elements was just added. Given this is could actually be
+    // beneficial to leave the selection as is for these cases.
+    this._trimListener.dispose();
+    this._trimListener = e.activeBuffer.lines.onTrim(amount => this._onTrim(amount));
+  }
+
+  /**
+   * Converts a viewport column to the character index on the buffer line, the
+   * latter takes into account wide characters.
+   * @param coords The coordinates to find the 2 index for.
+   */
+  private _convertViewportColToCharacterIndex(bufferLine: IBufferLine, coords: [number, number]): number {
+    let charIndex = coords[0];
+    for (let i = 0; coords[0] >= i; i++) {
+      const length = bufferLine.loadCell(i, this._workCell).getChars().length;
+      if (this._workCell.getWidth() === 0) {
+        // Wide characters aren't included in the line string so decrement the
+        // index so the index is back on the wide character.
+        charIndex--;
+      } else if (length > 1 && coords[0] !== i) {
+        // Emojis take up multiple characters, so adjust accordingly. For these
+        // we don't want ot include the character at the column as we're
+        // returning the start index in the string, not the end index.
+        charIndex += length - 1;
+      }
+    }
+    return charIndex;
+  }
+
+  public setSelection(col: number, row: number, length: number): void {
+    this._model.clearSelection();
+    this._removeMouseDownListeners();
+    this._model.selectionStart = [col, row];
+    this._model.selectionStartLength = length;
+    this.refresh();
+  }
+
+  public rightClickSelect(ev: MouseEvent): void {
+    if (!this._isClickInSelection(ev)) {
+      if (this._selectWordAtCursor(ev, false)) {
+        this.refresh(true);
+      }
+      this._fireEventIfSelectionChanged();
+    }
+  }
+
+  /**
+   * Gets positional information for the word at the coordinated specified.
+   * @param coords The coordinates to get the word at.
+   */
+  private _getWordAt(coords: [number, number], allowWhitespaceOnlySelection: boolean, followWrappedLinesAbove: boolean = true, followWrappedLinesBelow: boolean = true): IWordPosition | undefined {
+    // Ensure coords are within viewport (eg. not within scroll bar)
+    if (coords[0] >= this._bufferService.cols) {
+      return undefined;
+    }
+
+    const buffer = this._bufferService.buffer;
+    const bufferLine = buffer.lines.get(coords[1]);
+    if (!bufferLine) {
+      return undefined;
+    }
+
+    const line = buffer.translateBufferLineToString(coords[1], false);
+
+    // Get actual index, taking into consideration wide characters
+    let startIndex = this._convertViewportColToCharacterIndex(bufferLine, coords);
+    let endIndex = startIndex;
+
+    // Record offset to be used later
+    const charOffset = coords[0] - startIndex;
+    let leftWideCharCount = 0;
+    let rightWideCharCount = 0;
+    let leftLongCharOffset = 0;
+    let rightLongCharOffset = 0;
+
+    if (line.charAt(startIndex) === ' ') {
+      // Expand until non-whitespace is hit
+      while (startIndex > 0 && line.charAt(startIndex - 1) === ' ') {
+        startIndex--;
+      }
+      while (endIndex < line.length && line.charAt(endIndex + 1) === ' ') {
+        endIndex++;
+      }
+    } else {
+      // Expand until whitespace is hit. This algorithm works by scanning left
+      // and right from the starting position, keeping both the index format
+      // (line) and the column format (bufferLine) in sync. When a wide
+      // character is hit, it is recorded and the column index is adjusted.
+      let startCol = coords[0];
+      let endCol = coords[0];
+
+      // Consider the initial position, skip it and increment the wide char
+      // variable
+      if (bufferLine.getWidth(startCol) === 0) {
+        leftWideCharCount++;
+        startCol--;
+      }
+      if (bufferLine.getWidth(endCol) === 2) {
+        rightWideCharCount++;
+        endCol++;
+      }
+
+      // Adjust the end index for characters whose length are > 1 (emojis)
+      const length = bufferLine.getString(endCol).length;
+      if (length > 1) {
+        rightLongCharOffset += length - 1;
+        endIndex += length - 1;
+      }
+
+      // Expand the string in both directions until a space is hit
+      while (startCol > 0 && startIndex > 0 && !this._isCharWordSeparator(bufferLine.loadCell(startCol - 1, this._workCell))) {
+        bufferLine.loadCell(startCol - 1, this._workCell);
+        const length = this._workCell.getChars().length;
+        if (this._workCell.getWidth() === 0) {
+          // If the next character is a wide char, record it and skip the column
+          leftWideCharCount++;
+          startCol--;
+        } else if (length > 1) {
+          // If the next character's string is longer than 1 char (eg. emoji),
+          // adjust the index
+          leftLongCharOffset += length - 1;
+          startIndex -= length - 1;
+        }
+        startIndex--;
+        startCol--;
+      }
+      while (endCol < bufferLine.length && endIndex + 1 < line.length && !this._isCharWordSeparator(bufferLine.loadCell(endCol + 1, this._workCell))) {
+        bufferLine.loadCell(endCol + 1, this._workCell);
+        const length = this._workCell.getChars().length;
+        if (this._workCell.getWidth() === 2) {
+          // If the next character is a wide char, record it and skip the column
+          rightWideCharCount++;
+          endCol++;
+        } else if (length > 1) {
+          // If the next character's string is longer than 1 char (eg. emoji),
+          // adjust the index
+          rightLongCharOffset += length - 1;
+          endIndex += length - 1;
+        }
+        endIndex++;
+        endCol++;
+      }
+    }
+
+    // Incremenet the end index so it is at the start of the next character
+    endIndex++;
+
+    // Calculate the start _column_, converting the the string indexes back to
+    // column coordinates.
+    let start =
+        startIndex // The index of the selection's start char in the line string
+        + charOffset // The difference between the initial char's column and index
+        - leftWideCharCount // The number of wide chars left of the initial char
+        + leftLongCharOffset; // The number of additional chars left of the initial char added by columns with strings longer than 1 (emojis)
+
+    // Calculate the length in _columns_, converting the the string indexes back
+    // to column coordinates.
+    let length = Math.min(this._bufferService.cols, // Disallow lengths larger than the terminal cols
+      endIndex // The index of the selection's end char in the line string
+      - startIndex // The index of the selection's start char in the line string
+      + leftWideCharCount // The number of wide chars left of the initial char
+      + rightWideCharCount // The number of wide chars right of the initial char (inclusive)
+      - leftLongCharOffset // The number of additional chars left of the initial char added by columns with strings longer than 1 (emojis)
+      - rightLongCharOffset); // The number of additional chars right of the initial char (inclusive) added by columns with strings longer than 1 (emojis)
+
+    if (!allowWhitespaceOnlySelection && line.slice(startIndex, endIndex).trim() === '') {
+      return undefined;
+    }
+
+    // Recurse upwards if the line is wrapped and the word wraps to the above line
+    if (followWrappedLinesAbove) {
+      if (start === 0 && bufferLine.getCodePoint(0) !== 32 /* ' ' */) {
+        const previousBufferLine = buffer.lines.get(coords[1] - 1);
+        if (previousBufferLine && bufferLine.isWrapped && previousBufferLine.getCodePoint(this._bufferService.cols - 1) !== 32 /* ' ' */) {
+          const previousLineWordPosition = this._getWordAt([this._bufferService.cols - 1, coords[1] - 1], false, true, false);
+          if (previousLineWordPosition) {
+            const offset = this._bufferService.cols - previousLineWordPosition.start;
+            start -= offset;
+            length += offset;
+          }
+        }
+      }
+    }
+
+    // Recurse downwards if the line is wrapped and the word wraps to the next line
+    if (followWrappedLinesBelow) {
+      if (start + length === this._bufferService.cols && bufferLine.getCodePoint(this._bufferService.cols - 1) !== 32 /* ' ' */) {
+        const nextBufferLine = buffer.lines.get(coords[1] + 1);
+        if (nextBufferLine?.isWrapped && nextBufferLine.getCodePoint(0) !== 32 /* ' ' */) {
+          const nextLineWordPosition = this._getWordAt([0, coords[1] + 1], false, false, true);
+          if (nextLineWordPosition) {
+            length += nextLineWordPosition.length;
+          }
+        }
+      }
+    }
+
+    return { start, length };
+  }
+
+  /**
+   * Selects the word at the coordinates specified.
+   * @param coords The coordinates to get the word at.
+   * @param allowWhitespaceOnlySelection If whitespace should be selected
+   */
+  protected _selectWordAt(coords: [number, number], allowWhitespaceOnlySelection: boolean): void {
+    const wordPosition = this._getWordAt(coords, allowWhitespaceOnlySelection);
+    if (wordPosition) {
+      // Adjust negative start value
+      while (wordPosition.start < 0) {
+        wordPosition.start += this._bufferService.cols;
+        coords[1]--;
+      }
+      this._model.selectionStart = [wordPosition.start, coords[1]];
+      this._model.selectionStartLength = wordPosition.length;
+    }
+  }
+
+  /**
+   * Sets the selection end to the word at the coordinated specified.
+   * @param coords The coordinates to get the word at.
+   */
+  private _selectToWordAt(coords: [number, number]): void {
+    const wordPosition = this._getWordAt(coords, true);
+    if (wordPosition) {
+      let endRow = coords[1];
+
+      // Adjust negative start value
+      while (wordPosition.start < 0) {
+        wordPosition.start += this._bufferService.cols;
+        endRow--;
+      }
+
+      // Adjust wrapped length value, this only needs to happen when values are reversed as in that
+      // case we're interested in the start of the word, not the end
+      if (!this._model.areSelectionValuesReversed()) {
+        while (wordPosition.start + wordPosition.length > this._bufferService.cols) {
+          wordPosition.length -= this._bufferService.cols;
+          endRow++;
+        }
+      }
+
+      this._model.selectionEnd = [this._model.areSelectionValuesReversed() ? wordPosition.start : wordPosition.start + wordPosition.length, endRow];
+    }
+  }
+
+  /**
+   * Gets whether the character is considered a word separator by the select
+   * word logic.
+   * @param char The character to check.
+   */
+  private _isCharWordSeparator(cell: CellData): boolean {
+    // Zero width characters are never separators as they are always to the
+    // right of wide characters
+    if (cell.getWidth() === 0) {
+      return false;
+    }
+    return this._optionsService.rawOptions.wordSeparator.indexOf(cell.getChars()) >= 0;
+  }
+
+  /**
+   * Selects the line specified.
+   * @param line The line index.
+   */
+  protected _selectLineAt(line: number): void {
+    const wrappedRange = this._bufferService.buffer.getWrappedRangeForLine(line);
+    this._model.selectionStart = [0, wrappedRange.first];
+    this._model.selectionEnd = [this._bufferService.cols, wrappedRange.last];
+    this._model.selectionStartLength = 0;
+  }
+}