org.eclipse.jface.text.tests/src/org/eclipse/jface/text/tests/contentassist/ContextInformationTest.java

/*******************************************************************************
 * Copyright (c) 2017, 2019 Stephan Wahlbrink and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Stephan Wahlbrink <sw@wahlbrink.eu>
 *******************************************************************************/
package org.eclipse.jface.text.tests.contentassist;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.List;

import org.junit.Test;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import org.eclipse.text.tests.Accessor;

import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.ContentAssistant;


public class ContextInformationTest extends AbstractContentAssistTest {


	private Shell infoShell;


	private ContentAssistant createBarContentAssist() {
		ContentAssistant contentAssistant= new ContentAssistant();
		contentAssistant.setContentAssistProcessor(new BarContentAssistProcessor(), IDocument.DEFAULT_CONTENT_TYPE);
		return contentAssistant;
	}

	@Test
	public void testContextInfo() throws Exception {
		setupSourceViewer(createBarContentAssist(), BarContentAssistProcessor.PROPOSAL);
		
		final List<Shell> beforeShells= getCurrentShells();
		
		selectAndReveal(4, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		selectAndReveal(8, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 1", getInfoText(this.infoShell));
	}

	@Test
	public void testContextInfo_hide_Bug512251() throws Exception {
		setupSourceViewer(createBarContentAssist(), BarContentAssistProcessor.PROPOSAL);
		
		final List<Shell> beforeShells= getCurrentShells();
		
		selectAndReveal(4, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		
		selectAndReveal(8, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		
		// ITextEditorActionConstants.DELETE_LINE
		getDocument().set("");
		
		new Accessor(getContentAssistant(), ContentAssistant.class).invoke("hide", new Object[0]);
	}

	@Test
	public void testContextInfo_hide_focusOut() throws Exception {
		setupSourceViewer(createBarContentAssist(), BarContentAssistProcessor.PROPOSAL);
		
		final List<Shell> beforeShells = getCurrentShells();
		
		selectAndReveal(4, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		selectAndReveal(8, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 1", getInfoText(this.infoShell));
		
		// Hide all
		getButton().setFocus();
		processEvents();
		assertTrue(this.infoShell.isDisposed() || !this.infoShell.isVisible());
	}

	@Test
	public void testContextInfo_hide_keyEsc() throws Exception {
		setupSourceViewer(createBarContentAssist(), BarContentAssistProcessor.PROPOSAL);
		
		final List<Shell> beforeShells = getCurrentShells();
		
		selectAndReveal(4, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		selectAndReveal(8, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 1", getInfoText(this.infoShell));
		
		emulatePressEscKey();
		processEvents();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		emulatePressEscKey();
		processEvents();
		assertTrue(this.infoShell.isDisposed() || !this.infoShell.isVisible());
	}

	@Test
	public void testContextInfo_hide_validRange() throws Exception {
		setupSourceViewer(createBarContentAssist(), BarContentAssistProcessor.PROPOSAL + '\n');
		
		final List<Shell> beforeShells = getCurrentShells();
		
		selectAndReveal(4, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		selectAndReveal(8, 0);
		processEvents();
		
		triggerContextInformation();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 1", getInfoText(this.infoShell));
		
		emulatePressArrowKey(SWT.ARROW_LEFT);
		processEvents();
		this.infoShell= findNewShell(beforeShells);
		assertEquals("idx= 0", getInfoText(this.infoShell));
		
		emulatePressArrowKey(SWT.ARROW_DOWN);
		processEvents();
		assertTrue(this.infoShell.isDisposed() || !this.infoShell.isVisible());
	}


	static String getInfoText(final Shell shell) {
		assertTrue(shell.isVisible());
		Control[] children= shell.getChildren();
		for (Control child : children) {
			if (child instanceof Text) {
				return ((Text) child).getText();
			}
			if (child instanceof StyledText) {
				return ((StyledText) child).getText();
			}
		}
		return null;
	}

}