Remove UI dependencies to JCR.

[lgpl/argeo-commons.git] / jcr / org.argeo.cms.jcr.ui / src / org / argeo / cms / ui / util / StyleSheetResourceLoader.java

diff --git a/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/util/StyleSheetResourceLoader.java b/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/util/StyleSheetResourceLoader.java
new file mode 100644 (file)
index 0000000..1e17dc9
--- /dev/null
+++ b/jcr/org.argeo.cms.jcr.ui/src/org/argeo/cms/ui/util/StyleSheetResourceLoader.java
@@ -0,0 +1,71 @@
+package org.argeo.cms.ui.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.cms.swt.CmsException;
+import org.eclipse.rap.rwt.service.ResourceLoader;
+import org.osgi.framework.Bundle;
+
+/** {@link ResourceLoader} caching stylesheets. */
+public class StyleSheetResourceLoader implements ResourceLoader {
+       private Bundle themeBundle;
+       private Map<String, StyleSheet> stylesheets = new LinkedHashMap<String, StyleSheet>();
+
+       public StyleSheetResourceLoader(Bundle themeBundle) {
+               this.themeBundle = themeBundle;
+       }
+
+       @Override
+       public InputStream getResourceAsStream(String resourceName) throws IOException {
+               if (!stylesheets.containsKey(resourceName)) {
+                       // TODO deal with other bundles
+                       // Bundle bundle = bundleContext.getBundle();
+                       // String location =
+                       // bundle.getLocation().substring("initial@reference:".length());
+                       // if (location.startsWith("file:")) {
+                       // Path path = null;
+                       // try {
+                       // path = Paths.get(new URI(location));
+                       // } catch (URISyntaxException e) {
+                       // e.printStackTrace();
+                       // }
+                       // if (path != null) {
+                       // Path resourcePath = path.resolve(resourceName);
+                       // if (Files.exists(resourcePath))
+                       // return Files.newInputStream(resourcePath);
+                       // }
+                       // }
+
+                       URL res = themeBundle.getEntry(resourceName);
+                       if (res == null)
+                               throw new CmsException(
+                                               "Entry " + resourceName + " not found in bundle " + themeBundle.getSymbolicName());
+                       ByteArrayOutputStream out = new ByteArrayOutputStream();
+                       IOUtils.copy(res.openStream(), out);
+                       stylesheets.put(resourceName, new StyleSheet(out.toByteArray()));
+               }
+               return new ByteArrayInputStream(stylesheets.get(resourceName).getData());
+               // return res.openStream();
+       }
+
+       private class StyleSheet {
+               private byte[] data;
+
+               public StyleSheet(byte[] data) {
+                       super();
+                       this.data = data;
+               }
+
+               public byte[] getData() {
+                       return data;
+               }
+
+       }
+}