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144 changes: 144 additions & 0 deletions
144
src/vs/workbench/parts/terminal/node/terminalCommandTracker.ts
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| /*--------------------------------------------------------------------------------------------- | ||
| * Copyright (c) Microsoft Corporation. All rights reserved. | ||
| * Licensed under the MIT License. See License.txt in the project root for license information. | ||
| *--------------------------------------------------------------------------------------------*/ | ||
|
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| import { Terminal, IMarker } from 'vscode-xterm'; | ||
| import { ITerminalCommandTracker } from 'vs/workbench/parts/terminal/common/terminal'; | ||
|
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| /** | ||
| * The minimize size of the prompt in which to assume the line is a command. | ||
| */ | ||
| const MINIMUM_PROMPT_LENGTH = 2; | ||
|
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| enum Boundary { | ||
| Top, | ||
| Bottom | ||
| } | ||
|
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| export class TerminalCommandTracker implements ITerminalCommandTracker { | ||
| private _currentMarker: IMarker | Boundary = Boundary.Bottom; | ||
| private _selectionStart: IMarker | Boundary | null = null; | ||
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| constructor( | ||
| private _xterm: Terminal | ||
| ) { | ||
| this._xterm.on('key', key => this._onKey(key)); | ||
| } | ||
|
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| private _onKey(key: string): void { | ||
| if (key === '\x0d') { | ||
| this._onEnter(); | ||
| } | ||
|
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| // Clear the current marker so successive focus/selection actions are performed from the | ||
| // bottom of the buffer | ||
| this._currentMarker = Boundary.Bottom; | ||
| this._selectionStart = null; | ||
| } | ||
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| private _onEnter(): void { | ||
| if (this._xterm.buffer.x >= MINIMUM_PROMPT_LENGTH) { | ||
| this._xterm.addMarker(0); | ||
| } | ||
| } | ||
|
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| public focusPreviousCommand(retainSelection: boolean = false): void { | ||
| if (!retainSelection) { | ||
| this._selectionStart = null; | ||
| } | ||
|
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| let markerIndex; | ||
| if (this._currentMarker === Boundary.Bottom) { | ||
| markerIndex = this._xterm.markers.length - 1; | ||
| } else if (this._currentMarker === Boundary.Top) { | ||
| markerIndex = -1; | ||
| } else { | ||
| markerIndex = this._xterm.markers.indexOf(this._currentMarker) - 1; | ||
| } | ||
|
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| if (markerIndex < 0) { | ||
| this._currentMarker = Boundary.Top; | ||
| this._xterm.scrollToTop(); | ||
| return; | ||
| } | ||
|
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| this._currentMarker = this._xterm.markers[markerIndex]; | ||
| this._xterm.scrollToLine(this._currentMarker.line); | ||
| } | ||
|
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| public focusNextCommand(retainSelection: boolean = false): void { | ||
| if (!retainSelection) { | ||
| this._selectionStart = null; | ||
| } | ||
|
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| let markerIndex; | ||
| if (this._currentMarker === Boundary.Bottom) { | ||
| markerIndex = this._xterm.markers.length; | ||
| } else if (this._currentMarker === Boundary.Top) { | ||
| markerIndex = 0; | ||
| } else { | ||
| markerIndex = this._xterm.markers.indexOf(this._currentMarker) + 1; | ||
| } | ||
|
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| if (markerIndex >= this._xterm.markers.length) { | ||
| this._currentMarker = Boundary.Bottom; | ||
| this._xterm.scrollToBottom(); | ||
| return; | ||
| } | ||
|
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| this._currentMarker = this._xterm.markers[markerIndex]; | ||
| this._xterm.scrollToLine(this._currentMarker.line); | ||
| } | ||
|
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| public selectToPreviousCommand(): void { | ||
| if (this._selectionStart === null) { | ||
| this._selectionStart = this._currentMarker; | ||
| } | ||
| this.focusPreviousCommand(true); | ||
| this._selectLines(this._currentMarker, this._selectionStart); | ||
| } | ||
|
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| public selectToNextCommand(): void { | ||
| if (this._selectionStart === null) { | ||
| this._selectionStart = this._currentMarker; | ||
| } | ||
| this.focusNextCommand(true); | ||
| // if (!this._currentMarker | ||
| this._selectLines(this._currentMarker, this._selectionStart); | ||
| } | ||
|
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| private _selectLines(start: IMarker | Boundary, end: IMarker | Boundary | null): void { | ||
| if (end === null) { | ||
| end = Boundary.Bottom; | ||
| } | ||
|
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| let startLine = this._getLine(start); | ||
| let endLine = this._getLine(end); | ||
|
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| if (startLine > endLine) { | ||
| const temp = startLine; | ||
| startLine = endLine; | ||
| endLine = temp; | ||
| } | ||
|
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| // Subtract a line as the marker is on the line the command run, we do not want the next | ||
| // command in the selection for the current command | ||
| endLine -= 1; | ||
|
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| this._xterm.selectLines(startLine, endLine); | ||
| } | ||
|
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| private _getLine(marker: IMarker | Boundary): number { | ||
| // Use the _second last_ row as the last row is likely the prompt | ||
| if (marker === Boundary.Bottom) { | ||
| return this._xterm.buffer.ybase + this._xterm.rows - 1; | ||
| } | ||
|
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| if (marker === Boundary.Top) { | ||
| return 0; | ||
| } | ||
|
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| return marker.line; | ||
| } | ||
| } |