--- /dev/null
+package org.argeo.cms.util;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.cms.CmsException;
+import org.eclipse.rap.rwt.RWT;
+import org.eclipse.rap.rwt.application.Application;
+import org.eclipse.rap.rwt.service.ResourceLoader;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Simplifies the theming of an app (only RAP is supported at this stage).<br>
+ *
+ * Additional fonts listed in <code>/fonts.txt</code>.<br>
+ * Additional (standard CSS) header in <code>/header.css</code>.<br>
+ * RAP specific CSS files in <code>/rap/*.css</code>.<br>
+ * All images added as additional resources based on extensions
+ * <code>/ ** /*.{png,gif,jpeg,...}</code>.<br>
+ */
+public class CmsTheme {
+ private final static Log log = LogFactory.getLog(CmsTheme.class);
+
+ private String themeId;
+ private Map<String, ResourceLoader> css = new HashMap<>();
+ private Map<String, ResourceLoader> resources = new HashMap<>();
+
+ private String headerCss;
+ private List<String> fonts = new ArrayList<>();
+
+ private String basePath;
+ private String cssPath;
+
+ public CmsTheme(BundleContext bundleContext) {
+ this(bundleContext, null);
+ }
+
+ public CmsTheme(BundleContext bundleContext, String symbolicName) {
+ Bundle themeBundle;
+ if (symbolicName == null) {
+ themeBundle = bundleContext.getBundle();
+// basePath = "/theme/";
+// cssPath = basePath;
+ } else {
+ themeBundle = ThemeUtils.findThemeBundle(bundleContext, symbolicName);
+ }
+ basePath = "/";
+ cssPath = "/rap/";
+ this.themeId = RWT.DEFAULT_THEME_ID;
+ addStyleSheets(themeBundle, new BundleResourceLoader(themeBundle));
+ BundleResourceLoader themeBRL = new BundleResourceLoader(themeBundle);
+ addResources(themeBRL, "*.png");
+ addResources(themeBRL, "*.gif");
+ addResources(themeBRL, "*.jpg");
+ addResources(themeBRL, "*.jpeg");
+ addResources(themeBRL, "*.svg");
+ addResources(themeBRL, "*.ico");
+
+ // fonts
+ URL fontsUrl = themeBundle.getEntry(basePath + "fonts.txt");
+ if (fontsUrl != null) {
+ loadFontsUrl(fontsUrl);
+ }
+
+ // common CSS header (plain CSS)
+ URL headerCssUrl = themeBundle.getEntry(basePath + "header.css");
+ if (headerCssUrl != null) {
+ try (BufferedReader buffer = new BufferedReader(new InputStreamReader(headerCssUrl.openStream(), UTF_8))) {
+ headerCss = buffer.lines().collect(Collectors.joining("\n"));
+ } catch (IOException e) {
+ throw new CmsException("Cannot read " + headerCssUrl, e);
+ }
+ }
+
+ }
+
+ public void apply(Application application) {
+ resources: for (String name : resources.keySet()) {
+ if (name.startsWith("target/"))
+ continue resources; // skip maven output
+ application.addResource(name, resources.get(name));
+ if (log.isDebugEnabled())
+ log.debug("Added resource " + name);
+ }
+ for (String name : css.keySet()) {
+ application.addStyleSheet(themeId, name, css.get(name));
+ if (log.isDebugEnabled())
+ log.debug("Added RAP CSS " + name);
+ }
+ }
+
+ public String getAdditionalHeaders() {
+ StringBuilder sb = new StringBuilder();
+ if (headerCss != null) {
+ sb.append("<style type='text/css'>\n");
+ sb.append(headerCss);
+ sb.append("\n</style>\n");
+ }
+ for (String link : fonts) {
+ sb.append("<link rel='stylesheet' href='");
+ sb.append(link);
+ sb.append("'/>\n");
+ }
+ if (sb.length() == 0)
+ return null;
+ else
+ return sb.toString();
+ }
+
+ void addStyleSheets(Bundle themeBundle, ResourceLoader ssRL) {
+ Enumeration<URL> themeResources = themeBundle.findEntries(cssPath, "*.css", true);
+ if (themeResources == null)
+ return;
+ while (themeResources.hasMoreElements()) {
+ String resource = themeResources.nextElement().getPath();
+ // remove first '/' so that RWT registers it
+ resource = resource.substring(1);
+ if (!resource.endsWith("/")) {
+ if (css.containsKey(resource))
+ log.warn("Overriding " + resource + " from " + themeBundle.getSymbolicName());
+ css.put(resource, ssRL);
+ }
+
+ }
+
+ }
+
+ void loadFontsUrl(URL url) {
+ try (BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), UTF_8))) {
+ String line = null;
+ while ((line = in.readLine()) != null) {
+ line = line.trim();
+ if (!line.equals("") && !line.startsWith("#")) {
+ fonts.add(line);
+ }
+ }
+ } catch (IOException e) {
+ throw new CmsException("Cannot load URL " + url, e);
+ }
+ }
+
+ void addResources(BundleResourceLoader themeBRL, String pattern) {
+ Bundle themeBundle = themeBRL.getBundle();
+ Enumeration<URL> themeResources = themeBundle.findEntries(basePath, pattern, true);
+ if (themeResources == null)
+ return;
+ while (themeResources.hasMoreElements()) {
+ String resource = themeResources.nextElement().getPath();
+ // remove first '/' so that RWT registers it
+ resource = resource.substring(1);
+ if (!resource.endsWith("/")) {
+ if (resources.containsKey(resource))
+ log.warn("Overriding " + resource + " from " + themeBundle.getSymbolicName());
+ resources.put(resource, themeBRL);
+ }
+
+ }
+
+ }
+
+ public String getThemeId() {
+ return themeId;
+ }
+
+ public void setThemeId(String themeId) {
+ this.themeId = themeId;
+ }
+
+ public String getBasePath() {
+ return basePath;
+ }
+
+ public void setBasePath(String basePath) {
+ this.basePath = basePath;
+ }
+
+ public String getCssPath() {
+ return cssPath;
+ }
+
+ public void setCssPath(String cssPath) {
+ this.cssPath = cssPath;
+ }
+
+}
projects / lgpl / argeo-commons.git / blobdiff