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Merge FileImageDescriptor into URLImageDescriptor and clean it up #2899

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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,10 @@
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.nio.file.Path;
import java.util.function.Supplier;

import org.eclipse.jface.util.Policy;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.Image;
Expand Down Expand Up @@ -76,6 +78,9 @@ protected ImageDescriptor() {
ImageDescriptor(boolean shouldBeCached) {
super(shouldBeCached);
}

private static final ImageDescriptor NULL_IMAGE = createFromImageDataProvider(z -> null);

/**
* Creates and returns a new image descriptor from a file.
*
Expand All @@ -84,7 +89,21 @@ protected ImageDescriptor() {
* @return a new image descriptor
*/
public static ImageDescriptor createFromFile(Class<?> location, String filename) {
return new FileImageDescriptor(location, filename);
URL url;
if (location == null) {
try {
url = Path.of(filename).toUri().toURL();
} catch (MalformedURLException e) {
Policy.logException(e);
url = null;
}
} else {
url = location.getResource(filename);
}
if (url == null) {
return NULL_IMAGE; // Defer failure to the time when the image is created
}
return new URLImageDescriptor(url);
}

/**
Expand Down
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