X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Futil%2FCmsTheme.java;fp=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Futil%2FCmsTheme.java;h=76b1854a47f3642f1d52d1ab372850ed3031b097;hb=890b1739c54daf0b2f5a40b808f3cff78917d80c;hp=0000000000000000000000000000000000000000;hpb=21171ced2bce875e64db47d95bf4a00a0e141a9a;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.cms.ui/src/org/argeo/cms/util/CmsTheme.java b/org.argeo.cms.ui/src/org/argeo/cms/util/CmsTheme.java
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index 000000000..76b1854a4
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+++ b/org.argeo.cms.ui/src/org/argeo/cms/util/CmsTheme.java
@@ -0,0 +1,198 @@
+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;
+	}
+
+}