Add a new LaunchHandler to show error messages when starting applications

This LaunchHandler is only used when not running in headless mode. This
launchHandler is also responsible for showing the splash screen.

2011-03-30  Omair Majid  <[email protected]>

    * netx/net/sourceforge/jnlp/LaunchHandler.java
    (launchInitialized, launchStarting): New methods.
    * netx/net/sourceforge/jnlp/DefaultLaunchHandler.java
    (launchInitialized, launchStarting): New methods. No-op
    implementation.
    (printMessage): Make it static.
    * netx/net/sourceforge/jnlp/GuiLaunchHandler.java: New file.
    (launchCompleted, launchError, launchStarting, launchInitialized),
    (launchWarning, validationError): New methods.
    * netx/net/sourceforge/jnlp/Launcher.java (launchApplication):
    Invoke handler.launchInitialized and handler.launchStarting instead
    of showing a splash screen directly.
    * netx/net/sourceforge/jnlp/resources/Messages.properties: Add
    ButShowDetails, ButHideDetails and Error.
    * netx/net/sourceforge/jnlp/runtime/Boot.java (run): Do not exit on
    error.
    * netx/net/sourceforge/jnlp/runtime/JNLPRuntime.java
    (initialize): Set handler to GuiLaunchHandler if not running in
    headless mode.
    * netx/net/sourceforge/jnlp/util/BasicExceptionDialog.java: New
    file.
    (exceptionToString, show): New methods.

1 files changed, 123 insertions, 0 deletions

diff --git a/netx/net/sourceforge/jnlp/GuiLaunchHandler.java b/netx/net/sourceforge/jnlp/GuiLaunchHandler.java
new file mode 100644
index 0000000..28a2013
--- /dev/null
+++ b/netx/net/sourceforge/jnlp/GuiLaunchHandler.java
@@ -0,0 +1,123 @@
+/* GuiLaunchHandler.java
+   Copyright (C) 2011 Red Hat, Inc.
+
+This file is part of IcedTea.
+
+IcedTea is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+IcedTea is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with IcedTea; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package net.sourceforge.jnlp;
+
+import java.net.URL;
+
+import javax.swing.SwingUtilities;
+
+import net.sourceforge.jnlp.cache.ResourceTracker;
+import net.sourceforge.jnlp.cache.UpdatePolicy;
+import net.sourceforge.jnlp.runtime.ApplicationInstance;
+import net.sourceforge.jnlp.util.BasicExceptionDialog;
+
+/**
+ * A {@link LaunchHandler} that gives feedback to the user using GUI elements
+ * including splash screens and exception dialogs.
+ */
+public class GuiLaunchHandler implements LaunchHandler {
+
+    private JNLPSplashScreen splashScreen = null;
+    private UpdatePolicy policy = UpdatePolicy.ALWAYS;
+
+    @Override
+    public void launchCompleted(ApplicationInstance application) {
+        // do nothing
+    }
+
+    @Override
+    public void launchError(final LaunchException exception) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                BasicExceptionDialog.show(exception);
+            }
+        });
+    }
+
+    @Override
+    public void launchStarting(ApplicationInstance application) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                if (splashScreen != null) {
+                    if (splashScreen.isSplashScreenValid()) {
+                        splashScreen.setVisible(false);
+                    }
+                    splashScreen.dispose();
+                }
+            }
+        });
+    }
+
+    @Override
+    public void launchInitialized(final JNLPFile file) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                final int preferredWidth = 500;
+                final int preferredHeight = 400;
+
+                URL splashImageURL = file.getInformation().getIconLocation(
+                        IconDesc.SPLASH, preferredWidth, preferredHeight);
+                if (splashImageURL != null) {
+                    ResourceTracker resourceTracker = new ResourceTracker(true);
+                    resourceTracker.addResource(splashImageURL, file.getFileVersion(), null, policy);
+                    splashScreen = new JNLPSplashScreen(resourceTracker, null, null);
+                    splashScreen.setSplashImageURL(splashImageURL);
+                    if (splashScreen.isSplashScreenValid()) {
+                        splashScreen.setVisible(true);
+                    }
+                }
+            }
+        });
+    }
+
+    @Override
+    public boolean launchWarning(LaunchException warning) {
+        DefaultLaunchHandler.printMessage(warning);
+        return true;
+    }
+
+    @Override
+    public boolean validationError(LaunchException security) {
+        DefaultLaunchHandler.printMessage(security);
+        return true;
+    }
+
+}