org.rstudio.core.client.resources.ImageResource2x.java Source code

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Here is the source code for org.rstudio.core.client.resources.ImageResource2x.java

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/*
 * ImageResource2x.java
 *
 * Copyright (C) 2009-17 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.core.client.resources;

import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeUri;

public class ImageResource2x implements ImageResource {
    public ImageResource2x(ImageResource ref2x) {
        this(null, ref2x);
    }

    public ImageResource2x(ImageResource ref, ImageResource ref2x) {
        ref_ = ref;
        ref2x_ = ref2x;
    }

    private boolean getUse2xResolution() {
        return use2xResolution_ && ref2x_ != null;
    }

    private ImageResource getResource() {
        return getUse2xResolution() ? ref2x_ : ref_;
    }

    @Override
    public String getName() {
        return getResource().getName();
    }

    @Override
    public int getHeight() {
        return getUse2xResolution() ? getResource().getHeight() / 2 : getResource().getHeight();
    }

    @Override
    public int getLeft() {
        return getResource().getLeft();
    }

    @Override
    public SafeUri getSafeUri() {
        return getResource().getSafeUri();
    }

    @Override
    public int getTop() {
        return getResource().getTop();
    }

    @SuppressWarnings("deprecation")
    @Override
    public String getURL() {
        return getResource().getURL();
    }

    @Override
    public int getWidth() {
        return getUse2xResolution() ? getResource().getWidth() / 2 : getResource().getWidth();
    }

    @Override
    public boolean isAnimated() {
        return getResource().isAnimated();
    }

    public SafeHtml getSafeHtml() {
        if (html_ == null) {
            SafeHtmlBuilder sb = new SafeHtmlBuilder();

            sb.appendHtmlConstant("<img src=\"");
            sb.appendHtmlConstant(getSafeUri().asString());
            sb.appendHtmlConstant("\" width=\"");
            sb.appendHtmlConstant(new Integer(getWidth()).toString());
            sb.appendHtmlConstant("\" height=\"");
            sb.appendHtmlConstant(new Integer(getHeight()).toString());
            sb.appendHtmlConstant("\">");

            html_ = sb.toSafeHtml();
        }

        return html_;
    }

    private ImageResource ref_;
    private ImageResource ref2x_;
    private SafeHtml html_;
    private boolean use2xResolution_ = true;
}