org.eclipse.e4.tools.emf.ui.internal.common.ComponentLabelProvider.java Source code

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Here is the source code for org.eclipse.e4.tools.emf.ui.internal.common.ComponentLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2010 BestSolution.at 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common;

import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.Messages;
import org.eclipse.e4.ui.model.application.ui.MUIElement;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.jface.viewers.StyledString.Styler;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.TextStyle;

public class ComponentLabelProvider extends StyledCellLabelProvider {

    private ModelEditor editor;

    public static final String NOT_RENDERED_KEY = "NOT_RENDERED_STYLER";//$NON-NLS-1$

    public static final String NOT_VISIBLE_KEY = "NOT_VISIBLE_KEY";//$NON-NLS-1$

    public static final String NOT_VISIBLE_AND_RENDERED_KEY = "NOT_VISIBLE_AND_RENDERED_KEY";//$NON-NLS-1$

    private Font font;

    private Messages Messages;

    private static Styler BOTH_STYLER = new Styler() {
        @Override
        public void applyStyles(TextStyle textStyle) {
            textStyle.foreground = JFaceResources.getColorRegistry().get(NOT_VISIBLE_AND_RENDERED_KEY);
            textStyle.strikeout = true;
        }
    };

    private static Styler NOT_RENDERED_STYLER = new Styler() {
        @Override
        public void applyStyles(TextStyle textStyle) {
            textStyle.foreground = JFaceResources.getColorRegistry().get(NOT_RENDERED_KEY);
            textStyle.strikeout = true;
        }
    };

    private static Styler NOT_VISIBLE_STYLER = new Styler() {
        @Override
        public void applyStyles(TextStyle textStyle) {
            textStyle.foreground = JFaceResources.getColorRegistry().get(NOT_VISIBLE_KEY);
        }
    };

    public ComponentLabelProvider(ModelEditor editor, Messages Messages) {
        this.editor = editor;
        this.Messages = Messages;
    }

    @Override
    public void update(final ViewerCell cell) {
        if (cell.getElement() instanceof EObject) {

            EObject o = (EObject) cell.getElement();
            AbstractComponentEditor elementEditor = editor.getEditor(o.eClass());
            if (elementEditor != null) {
                String label = elementEditor.getLabel(o);
                String detailText = elementEditor.getDetailLabel(o);
                Styler styler = null;

                if (o instanceof MUIElement) {

                    if (!((MUIElement) o).isVisible() && !((MUIElement) o).isToBeRendered()) {
                        label += "<" + Messages.ComponentLabelProvider_invisible + "/" //$NON-NLS-1$//$NON-NLS-2$
                                + Messages.ComponentLabelProvider_notrendered + ">"; //$NON-NLS-1$
                        styler = BOTH_STYLER;
                    } else if (!((MUIElement) o).isVisible()) {
                        label += "<" + Messages.ComponentLabelProvider_invisible + ">"; //$NON-NLS-1$//$NON-NLS-2$
                        styler = NOT_VISIBLE_STYLER;
                    } else if (!((MUIElement) o).isToBeRendered()) {
                        label += "<" + Messages.ComponentLabelProvider_notrendered + ">"; //$NON-NLS-1$ //$NON-NLS-2$
                        styler = NOT_RENDERED_STYLER;
                    }
                }

                if (detailText == null) {
                    StyledString styledString = new StyledString(label, styler);
                    cell.setText(styledString.getString());
                    cell.setStyleRanges(styledString.getStyleRanges());
                } else {
                    StyledString styledString = new StyledString(label, styler);
                    styledString.append(" - " + detailText, StyledString.DECORATIONS_STYLER); //$NON-NLS-1$
                    cell.setText(styledString.getString());
                    cell.setStyleRanges(styledString.getStyleRanges());
                }
                cell.setImage(elementEditor.getImage(o, cell.getControl().getDisplay()));
            } else {
                cell.setText(cell.getElement().toString());
            }
        } else if (cell.getElement() instanceof VirtualEntry<?>) {
            String s = cell.getElement().toString();
            if (font == null) {
                FontData[] data = cell.getControl().getFont().getFontData();
                font = new Font(cell.getControl().getDisplay(),
                        new FontData(data[0].getName(), data[0].getHeight(), SWT.ITALIC));
            }
            cell.setFont(font);
            cell.setText(s);
        } else {
            cell.setText(cell.getElement().toString());
        }
    }

    @Override
    public void dispose() {
        if (font != null) {
            font.dispose();
            font = null;
        }
        super.dispose();
    }
}