Moved source into separate src directory due to popular request

[GpsPrune.git] / src / tim / prune / function / browser / BrowserLauncher.java

diff --git a/src/tim/prune/function/browser/BrowserLauncher.java b/src/tim/prune/function/browser/BrowserLauncher.java
new file mode 100644 (file)
index 0000000..7c6fa58
--- /dev/null
+++ b/src/tim/prune/function/browser/BrowserLauncher.java
@@ -0,0 +1,122 @@
+package tim.prune.function.browser;
+
+import java.net.URI;
+import javax.swing.JOptionPane;
+
+
+/**
+ * Class to launch a browser window to show an external map
+ * Some code and ideas taken from BareBonesBrowserLaunch at centerkey.com
+ */
+public abstract class BrowserLauncher
+{
+       private static boolean _initialised = false;
+       private static String[] _browserCommand = null;
+       private static boolean _urlNeedsQuotes = false;
+
+
+       /**
+        * Init method to set up browser
+        */
+       private static void init()
+       {
+               _browserCommand = null;
+               // First check if "which" command is available
+               if (commandExists("which"))
+               {
+                       // which exists, so try browsers in turn
+                       String[] browsersToTry = {"firefox", "iceweasel", "konqueror", "opera", "epiphany",
+                               "mozilla", "chromium", "midori", "safari", "lynx"};
+                       String browserFound = null;
+                       for (String browser : browsersToTry)
+                       {
+                               if (commandExists(browser))
+                               {
+                                       browserFound = browser;
+                                       break;
+                               }
+                       }
+                       if (browserFound != null) {
+                               _browserCommand = new String[] {browserFound, null};
+                       }
+               }
+
+               if (_browserCommand == null)
+               {
+                       // no which command (or none of the browsers found), so check if os name looks like a mac
+                       String osName = System.getProperty("os.name").toLowerCase();
+                       boolean isMacOsx = osName.indexOf("mac os") >= 0 || osName.indexOf("darwin") >= 0;
+                       if (isMacOsx) {
+                               // for Mac Osx just use "open" command
+                               _browserCommand = new String[] {"open", null};
+                       }
+                       else {
+                               // assume it's not linux or mac, so try windows method using "start" command
+                               _browserCommand = new String[] {"cmd.exe", "/C", "start", "\"\"", null};
+                               _urlNeedsQuotes = true;
+                       }
+               }
+               _initialised = true;
+       }
+
+
+       /**
+        * Check if the specified command exists on the system
+        * @param inCommand command to check
+        * @return true if the command exists
+        */
+       private static boolean commandExists(String inCommand)
+       {
+               try
+               {
+                       String[] commands = {"which", inCommand};
+                       if (Runtime.getRuntime().exec(commands).waitFor() == 0)
+                       {
+                               return true;
+                       }
+               }
+               catch (Exception e) {} // failed
+               return false;
+       }
+
+
+       /**
+        * Launch a browser window to show the given url
+        * @param inUrl url to show
+        */
+       public static void launchBrowser(String inUrl)
+       {
+               if (inUrl == null) {return;}
+               // First choice is to try the Desktop library from java 6, if available
+               try {
+                       Class<?> d = Class.forName("java.awt.Desktop");
+                       d.getDeclaredMethod("browse", new Class[] {URI.class}).invoke(
+                               d.getDeclaredMethod("getDesktop").invoke(null), new Object[] {URI.create(inUrl)});
+                       //above code mimics: Desktop.getDesktop().browse(URI.create(inUrl));
+               }
+               catch (Exception ignore)
+               {
+                       // The Desktop call failed, need to try backup methods
+                       if (!_initialised) {init();}
+                       if (_browserCommand == null) {
+                               JOptionPane.showMessageDialog(null, "Cannot show url: " + inUrl);
+                       }
+                       else
+                       {
+                               try
+                               {
+                                       // enclose url in quotes if necessary
+                                       String url = inUrl;
+                                       if (_urlNeedsQuotes) {url = "\"" + url + "\"";}
+                                       // Fill in url in last element of command array
+                                       _browserCommand[_browserCommand.length - 1] = url;
+                                       // execute command to launch browser
+                                       Runtime.getRuntime().exec(_browserCommand);
+                               }
+                               catch (Exception e) {
+                                       JOptionPane.showMessageDialog(null, "Failed to show url: " + inUrl);
+                               }
+                       }
+               }
+       }
+}