package be.nikiroo.fanfix.supported; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import be.nikiroo.fanfix.Instance; import be.nikiroo.utils.Image; /** * Helper class for {@link BasicSupport}, mostly dedicated to images for * the classes that implement {@link BasicSupport}. * * @author niki */ public class BasicSupportImages { /** * Check if the given resource can be a local image or a remote image, then * refresh the cache with it if it is. * * @param dir * the local directory to search, if any * @param line * the resource to check * * @return the image if found, or NULL * */ public Image getImage(BasicSupport support, File dir, String line) { URL url = getImageUrl(support, dir, line); if (url != null) { if ("file".equals(url.getProtocol())) { if (new File(url.getPath()).isDirectory()) { return null; } } InputStream in = null; try { in = Instance.getCache().open(url, support, true); return new Image(in); } catch (IOException e) { } finally { if (in != null) { try { in.close(); } catch (IOException e) { } } } } return null; } /** * Check if the given resource can be a local image or a remote image, then * refresh the cache with it if it is. * * @param dir * the local directory to search, if any * @param line * the resource to check * * @return the image URL if found, or NULL * */ public URL getImageUrl(BasicSupport support, File dir, String line) { URL url = null; if (line != null) { // try for files if (dir != null && dir.exists() && !dir.isFile()) { try { String relPath = null; String absPath = null; try { relPath = new File(dir, line.trim()).getAbsolutePath(); } catch (Exception e) { // Cannot be converted to path (one possibility to take // into account: absolute path on Windows) } try { absPath = new File(line.trim()).getAbsolutePath(); } catch (Exception e) { // Cannot be converted to path (at all) } for (String ext : getImageExt(true)) { File absFile = new File(absPath + ext); File relFile = new File(relPath + ext); if (absPath != null && absFile.exists() && absFile.isFile()) { url = absFile.toURI().toURL(); } else if (relPath != null && relFile.exists() && relFile.isFile()) { url = relFile.toURI().toURL(); } } } catch (Exception e) { // Should not happen since we control the correct arguments } } if (url == null) { // try for URLs try { for (String ext : getImageExt(true)) { if (Instance.getCache() .check(new URL(line + ext), true)) { url = new URL(line + ext); break; } } // try out of cache if (url == null) { for (String ext : getImageExt(true)) { try { url = new URL(line + ext); Instance.getCache().refresh(url, support, true); break; } catch (IOException e) { // no image with this ext url = null; } } } } catch (MalformedURLException e) { // Not an url } } // refresh the cached file if (url != null) { try { Instance.getCache().refresh(url, support, true); } catch (IOException e) { // woops, broken image url = null; } } } return url; } /** * Return the list of supported image extensions. * * @param emptyAllowed * TRUE to allow an empty extension on first place, which can be * used when you may already have an extension in your input but * are not sure about it * * @return the extensions */ public String[] getImageExt(boolean emptyAllowed) { if (emptyAllowed) { return new String[] { "", ".png", ".jpg", ".jpeg", ".gif", ".bmp" }; } return new String[] { ".png", ".jpg", ".jpeg", ".gif", ".bmp" }; } }