org.eclipse.ui.internal.texteditor.TextChangeHover.java Source code

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Here is the source code for org.eclipse.ui.internal.texteditor.TextChangeHover.java

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/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.texteditor;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.jface.text.IInformationControl;
import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.source.ILineRange;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.LineChangeHover;

import org.eclipse.ui.editors.text.EditorsUI;

/**
 * Change hover for text editors. Respects tab settings and text editor font.
 *
 * @since 3.0
 */
public class TextChangeHover extends LineChangeHover {

    /** The last created information control. */
    private int fLastScrollIndex = 0;

    /*
     * @see org.eclipse.jface.text.source.LineChangeHover#getTabReplacement()
     */
    protected String getTabReplacement() {
        return Character.toString('\t');
    }

    /*
     * @see org.eclipse.jface.text.source.LineChangeHover#getHoverInfo(org.eclipse.jface.text.source.ISourceViewer, org.eclipse.jface.text.source.ILineRange, int)
     */
    public Object getHoverInfo(ISourceViewer sourceViewer, ILineRange lineRange, int visibleLines) {
        fLastScrollIndex = sourceViewer.getTextWidget().getHorizontalPixel();
        return super.getHoverInfo(sourceViewer, lineRange, visibleLines);
    }

    /*
     * @see org.eclipse.jface.text.source.IAnnotationHoverExtension#getHoverControlCreator()
     */
    public IInformationControlCreator getHoverControlCreator() {
        return new IInformationControlCreator() {
            public IInformationControl createInformationControl(Shell parent) {
                SourceViewerInformationControl control = new SourceViewerInformationControl(parent, false,
                        JFaceResources.TEXT_FONT, EditorsUI.getTooltipAffordanceString());
                control.setHorizontalScrollPixel(fLastScrollIndex);
                return control;
            }
        };
    }

    /*
     * @see org.eclipse.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
     * @since 3.3
     */
    public IInformationControlCreator getInformationPresenterControlCreator() {
        return new IInformationControlCreator() {
            public IInformationControl createInformationControl(Shell parent) {
                return new SourceViewerInformationControl(parent, true, JFaceResources.TEXT_FONT, null);
            }
        };
    }

}