TypeScript contextkey.IContextKeyService類代碼示例

	protected _dispatch(e: IKeyboardEvent, target: IContextKeyServiceTarget): boolean {
		let shouldPreventDefault = false;

		const keybinding = this.resolveKeyboardEvent(e);
		if (keybinding.isChord()) {
			console.warn('Unexpected keyboard event mapped to a chord');
			return null;
		}
		const [firstPart,] = keybinding.getDispatchParts();
		if (firstPart === null) {
			// cannot be dispatched, probably only modifier keys
			return shouldPreventDefault;
		}

		const contextValue = this._contextKeyService.getContext(target);
		const currentChord = this._currentChord ? this._currentChord.keypress : null;
		const keypressLabel = keybinding.getLabel();
		const resolveResult = this._getResolver().resolve(contextValue, currentChord, firstPart);

		if (resolveResult && resolveResult.enterChord) {
			shouldPreventDefault = true;
			this._enterChordMode(firstPart, keypressLabel);
			return shouldPreventDefault;
		}

		if (this._statusService && this._currentChord) {
			if (!resolveResult || !resolveResult.commandId) {
				this._statusService.setStatusMessage(nls.localize('missing.chord', "The key combination ({0}, {1}) is not a command.", this._currentChord.label, keypressLabel), 10 * 1000 /* 10s */);
				shouldPreventDefault = true;
			}
		}

		this._leaveChordMode();

		if (resolveResult && resolveResult.commandId) {
			if (!resolveResult.bubble) {
				shouldPreventDefault = true;
			}
			if (typeof resolveResult.commandArgs === 'undefined') {
				this._commandService.executeCommand(resolveResult.commandId).then(undefined, err => this._notificationService.warn(err));
			} else {
				this._commandService.executeCommand(resolveResult.commandId, resolveResult.commandArgs).then(undefined, err => this._notificationService.warn(err));
			}
			/* __GDPR__
				"workbenchActionExecuted" : {
					"id" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
					"from": { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
				}
			*/
			this._telemetryService.publicLog('workbenchActionExecuted', { id: resolveResult.commandId, from: 'keybinding' });
		}

		return shouldPreventDefault;
	}

	public softDispatch(e: IKeyboardEvent, target: IContextKeyServiceTarget): IResolveResult {
		const keybinding = this.resolveKeyboardEvent(e);
		if (keybinding.isChord()) {
			console.warn('Unexpected keyboard event mapped to a chord');
			return null;
		}
		const [firstPart,] = keybinding.getDispatchParts();
		if (firstPart === null) {
			// cannot be dispatched, probably only modifier keys
			return null;
		}

		const contextValue = this._contextKeyService.getContext(target);
		const currentChord = this._currentChord ? this._currentChord.keypress : null;
		return this._getResolver().resolve(contextValue, currentChord, firstPart);
	}

export function getContextScopedWidget<T extends IContextScopedWidget>(contextKeyService: IContextKeyService, contextKey: string): T | undefined {
	return contextKeyService.getContext(document.activeElement).getValue(contextKey);
}

export function createWidgetScopedContextKeyService(contextKeyService: IContextKeyService, widget: IContextScopedWidget): IContextKeyService {
	return contextKeyService.createScoped(widget.target);
}

	public isSupported(): boolean {
		return this._contextKeyService.contextMatchesRules(this._precondition);
	}