Package ij.plugin

Source Code of ij.plugin.URLOpener

package ij.plugin;
import java.awt.*;
import java.io.*;
import java.net.URL;
import ij.*;
import ij.io.*;
import ij.gui.*;
import ij.plugin.frame.Editor;

/** Opens TIFFs, ZIP compressed TIFFs, DICOMs, GIFs and JPEGs using a URL.
  TIFF file names must end in ".tif", ZIP file names must end
  in ".zip" and DICOM file names must end in ".dcm".
  Opens a Web page in the default browser if the URL ends with "/".
*/
public class URLOpener implements PlugIn {

  private static String url = "http://rsb.info.nih.gov/ij/images/clown.gif";

  /** If 'urlOrName' is a URL, opens the image at that URL. If it is
    a file name, opens the image with that name from the 'images.location'
    URL in IJ_Props.txt. If it is blank, prompts for an image
    URL and open the specified image. */
  public void run(String urlOrName) {
    if (!urlOrName.equals("")) {
      if (urlOrName.endsWith("StartupMacros.txt"))
        openTextFile(urlOrName, true);
      else {
        String url = urlOrName.indexOf("://")>0?urlOrName:Prefs.getImagesURL()+urlOrName;
        ImagePlus imp = new ImagePlus(url);
        if (imp.getType()==ImagePlus.COLOR_RGB)
          Opener.convertGrayJpegTo8Bits(imp);
        WindowManager.checkForDuplicateName = true;
        FileInfo fi = imp.getOriginalFileInfo();
        if (fi!=null && fi.fileType==FileInfo.RGB48)
          imp = new CompositeImage(imp, 3);
        imp.show();
      }
      return;
    }
   
    GenericDialog gd = new GenericDialog("Enter a URL");
    gd.addMessage("Enter URL of a TIFF, JPEG, GIF, PNG or DICOM image");
    gd.addStringField("URL:", url, 40);
    gd.showDialog();
    if (gd.wasCanceled())
      return;
    url = gd.getNextString();
    url = url.trim();
    if (url.indexOf("://")==-1)
      url = "http://" + url;
    if (url.endsWith("/"))
      IJ.runPlugIn("ij.plugin.BrowserLauncher", url.substring(0, url.length()-1));
    else if (url.endsWith(".html") || url.endsWith(".htm") ||  url.indexOf(".html#")>0)
      IJ.runPlugIn("ij.plugin.BrowserLauncher", url);
    else if (url.endsWith(".txt")||url.endsWith(".ijm"))
      openTextFile(url, false);
    else {
      IJ.showStatus("Opening: " + url);
      ImagePlus imp = new ImagePlus(url);
      WindowManager.checkForDuplicateName = true;
      FileInfo fi = imp.getOriginalFileInfo();
      if (fi!=null && fi.fileType==FileInfo.RGB48)
        imp = new CompositeImage(imp, 3);
      imp.show();
      IJ.showStatus("");
    }
    IJ.register(URLOpener.class)// keeps this class from being GC'd
  }
 
  void openTextFile(String urlString, boolean install) {
    StringBuffer sb = null;
    try {
      URL url = new URL(urlString);
      InputStream in = url.openStream();
      BufferedReader br = new BufferedReader(new InputStreamReader(in));
      sb = new StringBuffer() ;
      String line;
      while ((line=br.readLine()) != null)
        sb.append (line + "\n");
      in.close ();
    } catch (IOException e) {
      if  (!(install&&urlString.endsWith("StartupMacros.txt")))
        IJ.error("URL Opener", ""+e);
      sb = null;
    }
    if (sb!=null) {
      if (install)
        (new MacroInstaller()).install(new String(sb));
      else
        (new Editor()).create(urlString, new String(sb));
    }
  }
}
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