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Matt BiernerandGitHub
5e92794be6
Resubmission of #157532 with the following changes: - Use `eslint-plugin-local` instead of `yarn` link to run our plugins - Move our plugins to a top level `.eslintplugin` dir (as required by `eslint-plugin-local`) - Update all names to `local/`
78 lines
2.5 KiB
TypeScript
78 lines
2.5 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { Emitter } from 'vs/base/common/event';
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import { IPartialCommandDetectionCapability, TerminalCapability } from 'vs/platform/terminal/common/capabilities/capabilities';
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// Importing types is safe in any layer
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// eslint-disable-next-line local/code-import-patterns
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import { IMarker, Terminal } from 'xterm-headless';
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const enum Constants {
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/**
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* The minimum size of the prompt in which to assume the line is a command.
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*/
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MinimumPromptLength = 2
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}
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/**
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* This capability guesses where commands are based on where the cursor was when enter was pressed.
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* It's very hit or miss but it's often correct and better than nothing.
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*/
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export class PartialCommandDetectionCapability implements IPartialCommandDetectionCapability {
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readonly type = TerminalCapability.PartialCommandDetection;
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private readonly _commands: IMarker[] = [];
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get commands(): readonly IMarker[] { return this._commands; }
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private readonly _onCommandFinished = new Emitter<IMarker>();
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readonly onCommandFinished = this._onCommandFinished.event;
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constructor(
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private readonly _terminal: Terminal,
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) {
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this._terminal.onData(e => this._onData(e));
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this._terminal.parser.registerCsiHandler({ final: 'J' }, params => {
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if (params.length >= 1 && (params[0] === 2 || params[0] === 3)) {
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this._clearCommandsInViewport();
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}
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// We don't want to override xterm.js' default behavior, just augment it
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return false;
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});
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}
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private _onData(data: string): void {
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if (data === '\x0d') {
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this._onEnter();
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}
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}
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private _onEnter(): void {
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if (!this._terminal) {
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return;
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}
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if (this._terminal.buffer.active.cursorX >= Constants.MinimumPromptLength) {
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const marker = this._terminal.registerMarker(0);
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if (marker) {
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this._commands.push(marker);
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this._onCommandFinished.fire(marker);
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}
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}
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}
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private _clearCommandsInViewport(): void {
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// Find the number of commands on the tail end of the array that are within the viewport
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let count = 0;
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for (let i = this._commands.length - 1; i >= 0; i--) {
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if (this._commands[i].line < this._terminal.buffer.active.baseY) {
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break;
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}
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count++;
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}
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// Remove them
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this._commands.splice(this._commands.length - count, count);
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}
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}
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