+package org.argeo.cms.swt.osgi;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.argeo.api.cms.ux.CmsIcon;
+import org.argeo.cms.osgi.BundleCmsTheme;
+import org.argeo.cms.swt.CmsSwtTheme;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.widgets.Display;
+
+/** Centralises some generic {@link CmsSwtTheme} patterns. */
+public class BundleCmsSwtTheme extends BundleCmsTheme implements CmsSwtTheme {
+ private Map<String, ImageData> imageCache = new HashMap<>();
+
+ private Map<String, Map<Integer, String>> iconPaths = new HashMap<>();
+
+ protected Image getImage(String path) {
+ if (!imageCache.containsKey(path)) {
+ try (InputStream in = getResourceAsStream(path)) {
+ if (in == null)
+ return null;
+ ImageData imageData = new ImageData(in);
+ imageCache.put(path, imageData);
+ } catch (IOException e) {
+ throw new IllegalStateException(e);
+ }
+ }
+ ImageData imageData = imageCache.get(path);
+ Image image = new Image(Display.getCurrent(), imageData);
+ return image;
+ }
+
+ /**
+ * And icon with this file name (without the extension), with a best effort to
+ * find the appropriate size, or <code>null</code> if not found.
+ *
+ * @param name An icon file name without path and extension.
+ * @param preferredSize the preferred size, if <code>null</code>,
+ * {@link #getSmallIconSize()} will be tried.
+ */
+ public Image getIcon(String name, Integer preferredSize) {
+ if (preferredSize == null)
+ preferredSize = getSmallIconSize();
+ Map<Integer, String> subCache;
+ if (!iconPaths.containsKey(name))
+ subCache = new HashMap<>();
+ else
+ subCache = iconPaths.get(name);
+ Image image = null;
+ if (!subCache.containsKey(preferredSize)) {
+ Image bestMatchSoFar = null;
+ paths: for (String p : getImagesPaths()) {
+ int lastSlash = p.lastIndexOf('/');
+ String fileName = p;
+ String ext = "";
+ if (lastSlash >= 0)
+ fileName = p.substring(lastSlash + 1);
+ int lastDot = fileName.lastIndexOf('.');
+ if (lastDot >= 0) {
+ ext = fileName.substring(lastDot + 1);
+ fileName = fileName.substring(0, lastDot);
+ }
+
+ if ("svg".equals(ext))
+ continue paths;
+
+ if (fileName.equals(name)) {// matched
+ Image img = getImage(p);
+ int width = img.getBounds().width;
+ if (width == preferredSize) {// perfect match
+ subCache.put(preferredSize, p);
+ image = img;
+ break paths;
+ }
+ if (bestMatchSoFar == null) {
+ bestMatchSoFar = img;
+ } else {
+ if (Math.abs(width - preferredSize) < Math
+ .abs(bestMatchSoFar.getBounds().width - preferredSize))
+ bestMatchSoFar = img;
+ }
+ }
+ }
+
+ if (image == null)
+ image = bestMatchSoFar;
+ } else {
+ image = getImage(subCache.get(preferredSize));
+ }
+
+ if (image != null && !iconPaths.containsKey(name))
+ iconPaths.put(name, subCache);
+
+ return image;
+ }
+
+ @Override
+ public Image getSmallIcon(CmsIcon icon) {
+ return getIcon(icon.name(), getSmallIconSize());
+ }
+
+ @Override
+ public Image getBigIcon(CmsIcon icon) {
+ return getIcon(icon.name(), getBigIconSize());
+ }
+
+}