tern.eclipse.jface.images.TernCompositeImageDescriptor.java Source code

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Here is the source code for tern.eclipse.jface.images.TernCompositeImageDescriptor.java

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/**
 *  Copyright (c) 2013-2016 Angelo ZERR.
 *  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:
 *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
 */
package tern.eclipse.jface.images;

import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;

/**
 * 
 * Tern composuet image descriptor used to merge tern module icon (YUI, AUI,
 * Angular, etc) with JavaScript type (boolean, string, function, number,
 * array).
 *
 */
public class TernCompositeImageDescriptor extends CompositeImageDescriptor {

    private static final Point SMALL_SIZE = new Point(16, 16);

    private ImageDescriptor fBaseImage;
    private String typeKey;
    private Point fSize;

    public TernCompositeImageDescriptor(ImageDescriptor baseImage, String typeKey) {
        this(baseImage, typeKey, SMALL_SIZE);
    }

    /**
     * Creates a new TernCompositeImageDescriptor.
     * 
     * @param baseImage
     *            an image descriptor used as the base image
     * @param flags
     *            flags indicating which adornments are to be rendered. See
     *            {@link #setAdornments(int)} for valid values.
     * @param size
     *            the size of the resulting image
     */
    public TernCompositeImageDescriptor(ImageDescriptor baseImage, String typeKey, Point size) {
        fBaseImage = baseImage;
        Assert.isNotNull(fBaseImage);
        this.typeKey = typeKey;
        // Assert.isTrue(fFlags >= 0);
        fSize = size;
        Assert.isNotNull(fSize);
    }

    @Override
    protected void drawCompositeImage(int width, int height) {
        ImageData bg = getImageData(fBaseImage);
        drawImage(bg, 0, 0);

        drawBottomRight();
    }

    private void drawBottomRight() {
        Point size = getSize();
        Point pos = new Point(size.x, size.y);

        addBottomRightImage(TernImagesRegistry.getImageDescriptor(TernImagesRegistry.getOvr(typeKey)), pos);
    }

    private void addBottomRightImage(ImageDescriptor desc, Point pos) {
        ImageData data = getImageData(desc);
        int x = pos.x - data.width;
        int y = pos.y - data.height;
        if (x >= 0 && y >= 0) {
            drawImage(data, x, y);
            pos.x = x;
        }
    }

    @Override
    protected Point getSize() {
        return fSize;
    }

    private ImageData getImageData(ImageDescriptor descriptor) {
        ImageData data = descriptor.getImageData(); // see bug 51965:
        // getImageData can return
        // null
        if (data == null) {
            data = DEFAULT_IMAGE_DATA;
            //      JavaScriptPlugin.logErrorMessage("Image data not available: " + descriptor.toString()); //$NON-NLS-1$
        }
        return data;
    }

}