Method load

app/src/processing/app/Theme.java:281–308

Attempts to parse the supplied zip file as a theme file. This is largely determined by the file being readable and containing a theme.txt entry. Returns null if the file is unreadable or doesn't contain theme.txt

(String namespace, File file)

     * Returns null if the file is unreadable or doesn't contain theme.txt 
     */
    static ZippedTheme load(String namespace, File file) {
      ZipFile zip = null;
      try {
        zip = new ZipFile(file);
        ZipEntry themeTxtEntry = zip.getEntry(THEME_FILE_NAME);
        if (themeTxtEntry != null) {
          String name = file.getName().substring(0, file.getName().length() - 4);
          String version = "";
          
          ZipEntry themePropsEntry = zip.getEntry("theme.properties");
          if (themePropsEntry != null) {
            Properties themeProperties = new Properties();
            themeProperties.load(zip.getInputStream(themePropsEntry));
            
            name = themeProperties.getProperty("name", name);
            version = themeProperties.getProperty("version", version);
          }
          
          return new ZippedTheme(namespace, file, zip, name, version);
        }
      } catch (Exception ex) {
        System.err.println(format(tr("Error loading theme {0}: {1}"),
                                  file.getAbsolutePath(), ex.getMessage()));
        IOUtils.closeQuietly(zip);
      }
      
      return null;
    }
    
  }