org.eclipse.opencert.userguidance/src/org/eclipse/opencert/userguidance/autocomplete/StyledTextContentAdapter.java

/*******************************************************************************
 * Copyright (c) 2016 KPIT Technologies.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *   Jan Mauersberger- initial API and implementation
 *   Sascha Baumgart- initial API and implementation
 *******************************************************************************/
package org.eclipse.opencert.userguidance.autocomplete;

import org.eclipse.jface.fieldassist.IControlContentAdapter;
import org.eclipse.jface.fieldassist.IControlContentAdapter2;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;

public class StyledTextContentAdapter implements IControlContentAdapter,
		IControlContentAdapter2 {
	@Override
	public String getControlContents(Control control) {
		return ((StyledText) control).getText();
	}

	@Override
	public void setControlContents(Control control, String text,
			int cursorPosition) {
		((StyledText) control).setText(text);
		((StyledText) control).setSelection(cursorPosition, cursorPosition);
	}

	@Override
	public void insertControlContents(Control control, String text,
			int cursorPosition) {
		Point selection = ((StyledText) control).getSelection();
		((StyledText) control).insert(text);
		// Insert will leave the cursor at the end of the inserted text. If this
		// is not what we wanted, reset the selection.
		if (cursorPosition < text.length()) {
			((StyledText) control).setSelection(selection.x + cursorPosition,
					selection.x + cursorPosition);
		}
	}

	@Override
	public int getCursorPosition(Control control) {
		return ((StyledText) control).getCaretOffset();
	}

	@Override
	public Rectangle getInsertionBounds(Control control) {
		StyledText text = (StyledText) control;
		Point caretOrigin = text.getCaret().getLocation();
		// We fudge the y pixels due to problems with getCaretLocation
		// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=52520
		return new Rectangle(caretOrigin.x + text.getClientArea().x,
				caretOrigin.y + text.getClientArea().y + 3, 1,
				text.getLineHeight());
	}

	@Override
	public void setCursorPosition(Control control, int position) {
		((StyledText) control).setSelection(new Point(position, position));
	}

	@Override
	public Point getSelection(Control control) {
		return ((StyledText) control).getSelection();
	}

	@Override
	public void setSelection(Control control, Point range) {
		((StyledText) control).setSelection(range);
	}
}