altoslib: Add non-persistent 'last logdir' preference

This is used to record the last directory for reading or writing log
files so that the UI can pop back to the same place next time.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/altoslib/AltosPreferences.java b/altoslib/AltosPreferences.java
index 392497ef6909de1324a26d62d47db3aba8b1624e..088ca3d7589c7507c1e17afb090158043737a218 100644 (file)
--- a/altoslib/AltosPreferences.java
+++ b/altoslib/AltosPreferences.java
@@ -62,6 +62,9 @@ public class AltosPreferences {
        /* Log directory */
        public static File logdir;
 
+       /* Last log directory - use this next time we open or save something */
+       public static File last_logdir;
+
        /* Map directory -- hangs of logdir */
        public static File mapdir;
 
@@ -198,6 +201,24 @@ public class AltosPreferences {
                }
        }
 
+       public static File last_logdir() {
+               synchronized (backend) {
+                       if (last_logdir == null)
+                               last_logdir = logdir;
+                       return last_logdir;
+               }
+       }
+
+       public static void set_last_logdir(File file) {
+               synchronized(backend) {
+                       if (file != null && !file.isDirectory())
+                               file = file.getParentFile();
+                       if (file == null)
+                               file = new File(".");
+                       last_logdir = file;
+               }
+       }
+
        public static File mapdir() {
                synchronized (backend) {
                        return mapdir;