Merge from vscode c58aaab8a1cc22a7139b761166a0d4f37d41e998 (#7880)

* Merge from vscode c58aaab8a1cc22a7139b761166a0d4f37d41e998

* fix pipelines

* fix strict-null-checks

* add missing files

src/vs/workbench/contrib/codeEditor/electron-browser/codeEditor.contribution.ts

@@ -4,3 +4,4 @@
  *--------------------------------------------------------------------------------------------*/
 
 import './sleepResumeRepaintMinimap';
+import './selectionClipboard';

src/vs/workbench/contrib/codeEditor/electron-browser/selectionClipboard.ts

@@ -0,0 +1,95 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { RunOnceScheduler } from 'vs/base/common/async';
+import { Disposable } from 'vs/base/common/lifecycle';
+import * as platform from 'vs/base/common/platform';
+import { ICodeEditor, IEditorMouseEvent } from 'vs/editor/browser/editorBrowser';
+import { registerEditorContribution } from 'vs/editor/browser/editorExtensions';
+import { ConfigurationChangedEvent, EditorOption } from 'vs/editor/common/config/editorOptions';
+import { ICursorSelectionChangedEvent } from 'vs/editor/common/controller/cursorEvents';
+import { Range } from 'vs/editor/common/core/range';
+import { IEditorContribution } from 'vs/editor/common/editorCommon';
+import { EndOfLinePreference } from 'vs/editor/common/model';
+import { IClipboardService } from 'vs/platform/clipboard/common/clipboardService';
+import { SelectionClipboardContributionID } from 'vs/workbench/contrib/codeEditor/browser/selectionClipboard';
+
+export class SelectionClipboard extends Disposable implements IEditorContribution {
+	private static readonly SELECTION_LENGTH_LIMIT = 65536;
+
+	constructor(editor: ICodeEditor, @IClipboardService clipboardService: IClipboardService) {
+		super();
+
+		if (platform.isLinux) {
+			let isEnabled = editor.getOption(EditorOption.selectionClipboard);
+
+			this._register(editor.onDidChangeConfiguration((e: ConfigurationChangedEvent) => {
+				if (e.hasChanged(EditorOption.selectionClipboard)) {
+					isEnabled = editor.getOption(EditorOption.selectionClipboard);
+				}
+			}));
+
+			this._register(editor.onMouseUp((e: IEditorMouseEvent) => {
+				if (!isEnabled) {
+					if (e.event.middleButton) {
+						// try to stop the upcoming paste
+						e.event.preventDefault();
+					}
+				}
+			}));
+
+			let setSelectionToClipboard = this._register(new RunOnceScheduler(() => {
+				if (!editor.hasModel()) {
+					return;
+				}
+				let model = editor.getModel();
+				let selections = editor.getSelections();
+				selections = selections.slice(0);
+				selections.sort(Range.compareRangesUsingStarts);
+
+				let resultLength = 0;
+				for (const sel of selections) {
+					if (sel.isEmpty()) {
+						// Only write if all cursors have selection
+						return;
+					}
+					resultLength += model.getValueLengthInRange(sel);
+				}
+
+				if (resultLength > SelectionClipboard.SELECTION_LENGTH_LIMIT) {
+					// This is a large selection!
+					// => do not write it to the selection clipboard
+					return;
+				}
+
+				let result: string[] = [];
+				for (const sel of selections) {
+					result.push(model.getValueInRange(sel, EndOfLinePreference.TextDefined));
+				}
+
+				let textToCopy = result.join(model.getEOL());
+				clipboardService.writeText(textToCopy, 'selection');
+			}, 100));
+
+			this._register(editor.onDidChangeCursorSelection((e: ICursorSelectionChangedEvent) => {
+				if (!isEnabled) {
+					return;
+				}
+				if (e.source === 'restoreState') {
+					// do not set selection to clipboard if this selection change
+					// was caused by restoring editors...
+					return;
+				}
+				setSelectionToClipboard.schedule();
+			}));
+		}
+	}
+
+	public dispose(): void {
+		super.dispose();
+	}
+}
+
+registerEditorContribution(SelectionClipboardContributionID, SelectionClipboard);