org.jboss.tools.jst.css.dialog.tabs.TabPreviewControl.java Source code

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Here is the source code for org.jboss.tools.jst.css.dialog.tabs.TabPreviewControl.java

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/*******************************************************************************
 * Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Exadel, Inc. and Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.jst.css.dialog.tabs;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.source.SourceViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.wst.css.ui.StructuredTextViewerConfigurationCSS;
import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration;
import org.eclipse.wst.sse.ui.internal.StructuredTextViewer;
import org.jboss.tools.jst.css.dialog.common.ICSSDialogModel;
import org.jboss.tools.jst.css.dialog.common.StyleAttributes;

/**
 * Class for creating Preview sheet tab
 */
public class TabPreviewControl extends Composite implements ICSSTabControl {

    /** Editor in which we open visual page. */
    SourceViewer viewer = null;
    private ICSSDialogModel cssModel = null;
    private String selector = null;
    private StyleAttributes styleAttributes;

    public void setSelector(String selector) {
        this.selector = selector;
    }

    /**
     * Constructor for creating controls
     * 
     * @param composite
     *            The parent composite for tab
     * @param styleAttributes
     *            the StyleAttributes object
     */
    public TabPreviewControl(Composite tabFolder, StyleAttributes styleAttributes, ICSSDialogModel cssModel) {
        super(tabFolder, SWT.NONE);
        setLayout(new FillLayout());
        this.cssModel = cssModel;
        this.styleAttributes = styleAttributes;
        initPreview(cssModel);
    }

    /**
     * Method update preview tab with information from the CSS file passed by
     * parameter.
     * 
     * @param cssFile
     *            CSS file to be displayed in preview area
     */
    public void initPreview(ICSSDialogModel cssModel) {
        this.cssModel = cssModel;
        if (cssModel != null) {

            StructuredTextViewerConfiguration baseConfiguration = new StructuredTextViewerConfigurationCSS();

            viewer = new StructuredTextViewer(this, null, null, false, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
            ((StructuredTextViewer) viewer).getTextWidget()
                    .setFont(JFaceResources.getFont("org.eclipse.wst.sse.ui.textfont")); //$NON-NLS-1$

            viewer.configure(baseConfiguration);
            viewer.setDocument(cssModel.getDocument());
            viewer.setEditable(false);

            layout();
        }
    }

    public void reinit(ICSSDialogModel cssModel) {
        this.cssModel = cssModel;
        viewer.setDocument(cssModel.getDocument());
    }

    public void releaseModel() {
        viewer.setDocument(null);
        cssModel = null;
    }

    /**
     * 
     * @param selector
     */
    public void selectClass(String selector) {
        if (cssModel != null) {
            IndexedRegion indexedRegion = cssModel.getIndexedRegion(selector);
            if (viewer != null) {
                if (indexedRegion != null) {
                    viewer.setSelectedRange(indexedRegion.getStartOffset(), indexedRegion.getLength());
                    viewer.revealRange(indexedRegion.getStartOffset(), indexedRegion.getLength());
                } else {
                    viewer.setSelectedRange(0, 0);
                    viewer.revealRange(0, 0);
                }
            }
        }
    }

    public void update() {
        cssModel.updateCSSStyle(selector, styleAttributes);
        selectClass(selector);

    }

}