2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $$Year-Rel$$ The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
24 import java.io.IOException;
25 import java.lang.reflect.Constructor;
26 import java.lang.reflect.Field;
27 import java.lang.reflect.InvocationTargetException;
28 import java.lang.reflect.Method;
31 * BrowserLauncher is a class that provides one static method, openURL, which
32 * opens the default web browser for the current user of the system to the given
33 * URL. It may support other protocols depending on the system -- mailto, ftp,
34 * etc. -- but that has not been rigorously tested and is not guaranteed to
37 * Yes, this is platform-specific code, and yes, it may rely on classes on
38 * certain platforms that are not part of the standard JDK. What we're trying to
39 * do, though, is to take something that's frequently desirable but inherently
40 * platform-specific -- opening a default browser -- and allow programmers (you,
41 * for example) to do so without worrying about dropping into native code or
42 * doing anything else similarly evil.
44 * Anyway, this code is completely in Java and will run on all JDK 1.1-compliant
45 * systems without modification or a need for additional libraries. All classes
46 * that are required on certain platforms to allow this to run are dynamically
47 * loaded at runtime via reflection and, if not found, will not cause this to do
48 * anything other than returning an error when opening the browser.
50 * There are certain system requirements for this class, as it's running through
51 * Runtime.exec(), which is Java's way of making a native system call.
52 * Currently, this requires that a Macintosh have a Finder which supports the
53 * GURL event, which is true for Mac OS 8.0 and 8.1 systems that have the
54 * Internet Scripting AppleScript dictionary installed in the Scripting
55 * Additions folder in the Extensions folder (which is installed by default as
56 * far as I know under Mac OS 8.0 and 8.1), and for all Mac OS 8.5 and later
57 * systems. On Windows, it only runs under Win32 systems (Windows 95, 98, and NT
58 * 4.0, as well as later versions of all). On other systems, this drops back
59 * from the inherently platform-sensitive concept of a default browser and
60 * simply attempts to launch Netscape via a shell command.
62 * This code is Copyright 1999-2001 by Eric Albert (ejalbert\@cs.stanford.edu)
63 * and may be redistributed or modified in any form without restrictions as long
64 * as the portion of this comment from this paragraph through the end of the
65 * comment is not removed. The author requests that he be notified of any
66 * application, applet, or other binary that makes use of this code, but that's
67 * more out of curiosity than anything and is not required. This software
68 * includes no warranty. The author is not repsonsible for any loss of data or
69 * functionality or any adverse or unexpected effects of using this software.
72 * Steven Spencer, JavaWorld magazine
73 * (<a href="http://www.javaworld.com/javaworld/javatips/jw-javatip66.html">Java
75 * Thanks also to Ron B. Yeh, Eric Shapiro, Ben Engber, Paul Teitlebaum, Andrea
76 * Cantatore, Larry Barowski, Trevor Bedzek, Frank Miedrich, and Ron Rabakukk
78 * @author Eric Albert (<a href=
79 * "mailto:ejalbert@cs.stanford.edu">ejalbert@cs.stanford.edu</a>)
80 * @version 1.4b1 (Released June 20, 2001)
82 public class BrowserLauncher
85 * The Java virtual machine that we are running on. Actually, in most cases we
86 * only care about the operating system, but some operating systems require us
87 * to switch on the VM.
89 private static int jvm;
91 /** The browser for the system */
92 private static Object browser;
95 * Caches whether any classes, methods, and fields that are not part of the
96 * JDK and need to be dynamically loaded at runtime loaded successfully.
98 * Note that if this is <code>false</code>, <code>openURL()</code> will always
99 * return an IOException.
101 private static boolean loadedWithoutErrors;
103 /** The com.apple.mrj.MRJFileUtils class */
104 private static Class mrjFileUtilsClass;
106 /** The com.apple.mrj.MRJOSType class */
107 private static Class mrjOSTypeClass;
109 /** The com.apple.MacOS.AEDesc class */
110 private static Class aeDescClass;
112 /** The <init>(int) method of com.apple.MacOS.AETarget */
113 private static Constructor aeTargetConstructor;
115 /** The <init>(int, int, int) method of com.apple.MacOS.AppleEvent */
116 private static Constructor appleEventConstructor;
118 /** The <init>(String) method of com.apple.MacOS.AEDesc */
119 private static Constructor aeDescConstructor;
121 /** The findFolder method of com.apple.mrj.MRJFileUtils */
122 private static Method findFolder;
124 /** The getFileCreator method of com.apple.mrj.MRJFileUtils */
125 private static Method getFileCreator;
127 /** The getFileType method of com.apple.mrj.MRJFileUtils */
128 private static Method getFileType;
130 /** The openURL method of com.apple.mrj.MRJFileUtils */
131 private static Method openURL;
133 /** The makeOSType method of com.apple.MacOS.OSUtils */
134 private static Method makeOSType;
136 /** The putParameter method of com.apple.MacOS.AppleEvent */
137 private static Method putParameter;
139 /** The sendNoReply method of com.apple.MacOS.AppleEvent */
140 private static Method sendNoReply;
142 /** Actually an MRJOSType pointing to the System Folder on a Macintosh */
143 private static Object kSystemFolderType;
145 /** The keyDirectObject AppleEvent parameter type */
146 private static Integer keyDirectObject;
148 /** The kAutoGenerateReturnID AppleEvent code */
149 private static Integer kAutoGenerateReturnID;
151 /** The kAnyTransactionID AppleEvent code */
152 private static Integer kAnyTransactionID;
154 /** The linkage object required for JDirect 3 on Mac OS X. */
155 private static Object linkage;
157 /** The framework to reference on Mac OS X */
158 private static final String JDirect_MacOSX = "/System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/HIToolbox";
160 /** JVM constant for MRJ 2.0 */
161 private static final int MRJ_2_0 = 0;
163 /** JVM constant for MRJ 2.1 or later */
164 private static final int MRJ_2_1 = 1;
166 /** JVM constant for Java on Mac OS X 10.0 (MRJ 3.0) */
167 private static final int MRJ_3_0 = 3;
169 /** JVM constant for MRJ 3.1 */
170 private static final int MRJ_3_1 = 4;
172 /** JVM constant for any Windows NT JVM */
173 private static final int WINDOWS_NT = 5;
175 /** JVM constant for any Windows 9x JVM */
176 private static final int WINDOWS_9x = 6;
178 /** JVM constant for any other platform */
179 private static final int OTHER = -1;
182 * The file type of the Finder on a Macintosh. Hardcoding "Finder" would keep
183 * non-U.S. English systems from working properly.
185 private static final String FINDER_TYPE = "FNDR";
188 * The creator code of the Finder on a Macintosh, which is needed to send
189 * AppleEvents to the application.
191 private static final String FINDER_CREATOR = "MACS";
193 /** The name for the AppleEvent type corresponding to a GetURL event. */
194 private static final String GURL_EVENT = "GURL";
197 * The first parameter that needs to be passed into Runtime.exec() to open the
198 * default web browser on Windows.
200 private static final String FIRST_WINDOWS_PARAMETER = "/c";
202 /** The second parameter for Runtime.exec() on Windows. */
203 private static final String SECOND_WINDOWS_PARAMETER = "start";
206 * The third parameter for Runtime.exec() on Windows. This is a "title"
207 * parameter that the command line expects. Setting this parameter allows URLs
208 * containing spaces to work.
210 private static final String THIRD_WINDOWS_PARAMETER = "\"\"";
213 * The shell parameters for Netscape that opens a given URL in an already-open
214 * copy of Netscape on many command-line systems.
216 private static final String NETSCAPE_REMOTE_PARAMETER = "-remote";
218 private static final String NETSCAPE_OPEN_PARAMETER_START = "openURL(";
220 private static final String NETSCAPE_OPEN_NEW_WINDOW = ", new-window";
222 private static final String NETSCAPE_OPEN_PARAMETER_END = ")";
225 * The message from any exception thrown throughout the initialization
228 private static String errorMessage;
231 * An initialization block that determines the operating system and loads the
232 * necessary runtime data.
237 loadedWithoutErrors = true;
239 if (!Platform.isJS())
247 String osName = System.getProperty("os.name");
249 if (osName.startsWith("Mac OS"))
251 String mrjVersion = System.getProperty("mrj.version");
252 String majorMRJVersion;
253 if (mrjVersion == null)
255 // must be on some later build with mrj support
256 majorMRJVersion = "3.1";
260 majorMRJVersion = mrjVersion.substring(0, 3);
265 double version = Double.valueOf(majorMRJVersion).doubleValue();
271 else if ((version >= 2.1) && (version < 3))
273 // Assume that all 2.x versions of MRJ work the same. MRJ 2.1 actually
274 // works via Runtime.exec() and 2.2 supports that but has an openURL()
276 // as well that we currently ignore.
279 else if (version == 3.0)
283 else if (version >= 3.1)
285 // Assume that all 3.1 and later versions of MRJ work the same.
290 loadedWithoutErrors = false;
291 errorMessage = "Unsupported MRJ version: " + version;
293 } catch (NumberFormatException nfe)
295 loadedWithoutErrors = false;
296 errorMessage = "Invalid MRJ version: " + mrjVersion;
299 else if (osName.startsWith("Windows"))
301 if (osName.indexOf("9") != -1)
315 if (loadedWithoutErrors)
316 { // if we haven't hit any errors yet
317 loadedWithoutErrors = loadClasses();
323 * This class should be never be instantiated; this just ensures so.
325 private BrowserLauncher()
330 * Called by a static initializer to load any classes, fields, and methods
331 * required at runtime to locate the user's web browser.
333 * @return <code>true</code> if all intialization succeeded <code>false</code>
334 * if any portion of the initialization failed
336 private static boolean loadClasses()
339 if (!Platform.isJS())
353 Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
354 Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
355 Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
356 Class aeClass = Class.forName("com.apple.MacOS.ae");
357 aeDescClass = Class.forName("com.apple.MacOS.AEDesc");
359 aeTargetConstructor = aeTargetClass
360 .getDeclaredConstructor(new Class[]
362 appleEventConstructor = appleEventClass
363 .getDeclaredConstructor(new Class[]
364 { int.class, int.class, aeTargetClass, int.class,
366 aeDescConstructor = aeDescClass
367 .getDeclaredConstructor(new Class[]
370 makeOSType = osUtilsClass.getDeclaredMethod("makeOSType",
373 putParameter = appleEventClass.getDeclaredMethod("putParameter",
375 { int.class, aeDescClass });
376 sendNoReply = appleEventClass.getDeclaredMethod("sendNoReply",
379 Field keyDirectObjectField = aeClass
380 .getDeclaredField("keyDirectObject");
381 keyDirectObject = (Integer) keyDirectObjectField.get(null);
383 Field autoGenerateReturnIDField = appleEventClass
384 .getDeclaredField("kAutoGenerateReturnID");
385 kAutoGenerateReturnID = (Integer) autoGenerateReturnIDField
388 Field anyTransactionIDField = appleEventClass
389 .getDeclaredField("kAnyTransactionID");
390 kAnyTransactionID = (Integer) anyTransactionIDField.get(null);
391 } catch (ClassNotFoundException cnfe)
393 errorMessage = cnfe.getMessage();
396 } catch (NoSuchMethodException nsme)
398 errorMessage = nsme.getMessage();
401 } catch (NoSuchFieldException nsfe)
403 errorMessage = nsfe.getMessage();
406 } catch (IllegalAccessException iae)
408 errorMessage = iae.getMessage();
419 mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
420 mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
422 Field systemFolderField = mrjFileUtilsClass
423 .getDeclaredField("kSystemFolderType");
424 kSystemFolderType = systemFolderField.get(null);
425 findFolder = mrjFileUtilsClass.getDeclaredMethod("findFolder",
428 getFileCreator = mrjFileUtilsClass
429 .getDeclaredMethod("getFileCreator", new Class[]
431 getFileType = mrjFileUtilsClass.getDeclaredMethod("getFileType",
434 } catch (ClassNotFoundException cnfe)
436 errorMessage = cnfe.getMessage();
439 } catch (NoSuchFieldException nsfe)
441 errorMessage = nsfe.getMessage();
444 } catch (NoSuchMethodException nsme)
446 errorMessage = nsme.getMessage();
449 } catch (SecurityException se)
451 errorMessage = se.getMessage();
454 } catch (IllegalAccessException iae)
456 errorMessage = iae.getMessage();
467 Class linker = Class.forName("com.apple.mrj.jdirect.Linker");
468 Constructor constructor = linker
469 .getConstructor(new Class[]
471 linkage = constructor
472 .newInstance(new Object[]
473 { BrowserLauncher.class });
474 } catch (ClassNotFoundException cnfe)
476 errorMessage = cnfe.getMessage();
479 } catch (NoSuchMethodException nsme)
481 errorMessage = nsme.getMessage();
484 } catch (InvocationTargetException ite)
486 errorMessage = ite.getMessage();
489 } catch (InstantiationException ie)
491 errorMessage = ie.getMessage();
494 } catch (IllegalAccessException iae)
496 errorMessage = iae.getMessage();
507 mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
508 openURL = mrjFileUtilsClass.getDeclaredMethod("openURL",
511 } catch (ClassNotFoundException cnfe)
513 errorMessage = cnfe.getMessage();
516 } catch (NoSuchMethodException nsme)
518 errorMessage = nsme.getMessage();
534 * Attempts to locate the default web browser on the local system. s results
535 * so it only locates the browser once for each use of this class per JVM
538 * @return The browser for the system. Note that this may not be what you
539 * would consider to be a standard web browser; instead, it's the
540 * application that gets called to open the default web browser. In
541 * some cases, this will be a non-String object that provides the
542 * means of calling the default browser.
544 private static Object locateBrowser()
546 if (!Platform.isJS())
565 Integer finderCreatorCode = (Integer) makeOSType.invoke(null,
568 Object aeTarget = aeTargetConstructor
569 .newInstance(new Object[]
570 { finderCreatorCode });
571 Integer gurlType = (Integer) makeOSType.invoke(null,
574 Object appleEvent = appleEventConstructor
575 .newInstance(new Object[]
576 { gurlType, gurlType, aeTarget, kAutoGenerateReturnID,
577 kAnyTransactionID });
579 // Don't set browser = appleEvent because then the next time we call
580 // locateBrowser(), we'll get the same AppleEvent, to which we'll
582 // added the relevant parameter. Instead, regenerate the AppleEvent
584 // There's probably a way to do this better; if any has any ideas,
588 } catch (IllegalAccessException iae)
591 errorMessage = iae.getMessage();
594 } catch (InstantiationException ie)
597 errorMessage = ie.getMessage();
600 } catch (InvocationTargetException ite)
603 errorMessage = ite.getMessage();
614 systemFolder = (File) findFolder.invoke(null,
616 { kSystemFolderType });
617 } catch (IllegalArgumentException iare)
620 errorMessage = iare.getMessage();
623 } catch (IllegalAccessException iae)
626 errorMessage = iae.getMessage();
629 } catch (InvocationTargetException ite)
632 errorMessage = ite.getTargetException().getClass() + ": "
633 + ite.getTargetException().getMessage();
638 String[] systemFolderFiles = systemFolder.list();
640 // Avoid a FilenameFilter because that can't be stopped mid-list
641 for (int i = 0; i < systemFolderFiles.length; i++)
645 File file = new File(systemFolder, systemFolderFiles[i]);
652 // We're looking for a file with a creator code of 'MACS' and
653 // a type of 'FNDR'. Only requiring the type results in non-Finder
654 // applications being picked up on certain Mac OS 9 systems,
655 // especially German ones, and sending a GURL event to those
656 // applications results in a logout under Multiple Users.
657 Object fileType = getFileType.invoke(null, new Object[] { file });
659 if (FINDER_TYPE.equals(fileType.toString()))
661 Object fileCreator = getFileCreator.invoke(null,
665 if (FINDER_CREATOR.equals(fileCreator.toString()))
667 browser = file.toString(); // Actually the Finder, but that's OK
672 } catch (IllegalArgumentException iare)
674 errorMessage = iare.getMessage();
677 } catch (IllegalAccessException iae)
680 errorMessage = iae.getMessage();
683 } catch (InvocationTargetException ite)
686 errorMessage = ite.getTargetException().getClass() + ": "
687 + ite.getTargetException().getMessage();
699 browser = ""; // Return something non-null
709 browser = "command.com";
715 browser = jalview.bin.Cache.getDefault("DEFAULT_BROWSER", "firefox");
727 * used to ensure that browser is up-to-date after a configuration change
728 * (Unix DEFAULT_BROWSER property change).
730 public static void resetBrowser()
736 * Attempts to open the default web browser to the given URL.
740 * @throws IOException
741 * If the web browser could not be located or does not run
743 public static void openURL(String url) throws IOException
748 Platform.openURL(url);
759 if (!loadedWithoutErrors)
761 throw new IOException(MessageManager
762 .formatMessage("exception.browser_not_found", new String[]
766 Object browser = locateBrowser();
770 throw new IOException(MessageManager.formatMessage(
771 "exception.browser_unable_to_locate", new String[]
779 Object aeDesc = null;
783 aeDesc = aeDescConstructor.newInstance(new Object[] { url });
784 putParameter.invoke(browser,
786 { keyDirectObject, aeDesc });
787 sendNoReply.invoke(browser, new Object[] {});
788 } catch (InvocationTargetException ite)
790 throw new IOException(MessageManager.formatMessage(
791 "exception.invocation_target_exception_creating_aedesc",
793 { ite.getMessage() }));
794 } catch (IllegalAccessException iae)
796 throw new IOException(MessageManager.formatMessage(
797 "exception.illegal_access_building_apple_evt", new String[]
798 { iae.getMessage() }));
799 } catch (InstantiationException ie)
801 throw new IOException(MessageManager.formatMessage(
802 "exception.illegal_access_building_apple_evt", new String[]
803 { ie.getMessage() }));
806 aeDesc = null; // Encourage it to get disposed if it was created
807 browser = null; // Ditto
813 Runtime.getRuntime().exec(new String[] { (String) browser, url });
819 int[] instance = new int[1];
820 int result = ICStart(instance, 0);
824 int[] selectionStart = new int[] { 0 };
825 byte[] urlBytes = url.getBytes();
826 int[] selectionEnd = new int[] { urlBytes.length };
827 result = ICLaunchURL(instance[0], new byte[] { 0 }, urlBytes,
828 urlBytes.length, selectionStart, selectionEnd);
832 // Ignore the return value; the URL was launched successfully
833 // regardless of what happens here.
838 throw new IOException(MessageManager.formatMessage(
839 "exception.unable_to_launch_url", new String[]
840 { Integer.valueOf(result).toString() }));
845 throw new IOException(MessageManager.formatMessage(
846 "exception.unable_to_create_internet_config", new String[]
847 { Integer.valueOf(result).toString() }));
856 openURL.invoke(null, new Object[] { url });
857 } catch (InvocationTargetException ite)
859 throw new IOException(MessageManager.formatMessage(
860 "exception.invocation_target_calling_url", new String[]
861 { ite.getMessage() }));
862 } catch (IllegalAccessException iae)
864 throw new IOException(MessageManager.formatMessage(
865 "exception.illegal_access_calling_url", new String[]
866 { iae.getMessage() }));
874 // Add quotes around the URL to allow ampersands and other special
875 // characters to work.
876 Process process = Runtime.getRuntime()
878 { (String) browser, FIRST_WINDOWS_PARAMETER,
879 SECOND_WINDOWS_PARAMETER, THIRD_WINDOWS_PARAMETER,
882 // This avoids a memory leak on some versions of Java on Windows.
883 // That's hinted at in
884 // <http://developer.java.sun.com/developer/qow/archive/68/>.
889 } catch (InterruptedException ie)
891 throw new IOException(MessageManager.formatMessage(
892 "exception.interrupted_launching_browser", new String[]
893 { ie.getMessage() }));
900 // Assume that we're on Unix and that Netscape (actually Firefox) is
902 // First, attempt to open the URL in a currently running session of
907 * System.out.println("Executing : "+browser+" "+
908 * NETSCAPE_REMOTE_PARAMETER+" "+ NETSCAPE_OPEN_PARAMETER_START + url +
909 * NETSCAPE_OPEN_NEW_WINDOW + NETSCAPE_OPEN_PARAMETER_END);
911 process = Runtime.getRuntime()
913 { (String) browser, NETSCAPE_REMOTE_PARAMETER,
915 NETSCAPE_OPEN_PARAMETER_START + url
916 + NETSCAPE_OPEN_NEW_WINDOW
917 + NETSCAPE_OPEN_PARAMETER_END });
921 int exitCode = process.waitFor();
924 { // if Netscape was not open
925 Runtime.getRuntime().exec(new String[] { (String) browser, url });
927 } catch (InterruptedException ie)
929 throw new IOException(MessageManager.formatMessage(
930 "exception.interrupted_launching_browser", new String[]
931 { ie.getMessage() }));
938 // This should never occur, but if it does, we'll try the simplest thing
940 Runtime.getRuntime().exec(new String[] { (String) browser, url });
949 * Methods required for Mac OS X. The presence of native methods does not
950 * cause any problems on other platforms.
952 private native static int ICStart(int[] instance, int signature);
954 private native static int ICStop(int[] instance);
956 private native static int ICLaunchURL(int instance, byte[] hint,
957 byte[] data, int len, int[] selectionStart, int[] selectionEnd);