altosui: Use persistent list of bluetooth devices for device dialogs

[fw/altos] / altosui / AltosBTKnown.java

diff --git a/altosui/AltosBTKnown.java b/altosui/AltosBTKnown.java
new file mode 100644 (file)
index 0000000..9583063
--- /dev/null
+++ b/altosui/AltosBTKnown.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright © 2011 Keith Packard <keithp@keithp.com>
+ *
+ * This program 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; version 2 of the License.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package altosui;
+import java.lang.*;
+import java.util.*;
+import libaltosJNI.*;
+import java.util.prefs.*;
+
+public class AltosBTKnown implements Iterable<AltosBTDevice> {
+       LinkedList<AltosBTDevice>       devices = new LinkedList<AltosBTDevice>();
+       Preferences                     bt_pref = AltosPreferences.bt_devices();
+
+       private String get_address(String name) {
+               return bt_pref.get(name, "");
+       }
+
+       private void set_address(String name, String addr) {
+               bt_pref.put(name, addr);
+               System.out.printf("saving known %s %s\n", name, addr);
+       }
+
+       private void remove(String name) {
+               bt_pref.remove(name);
+       }
+
+       private void load() {
+               try {
+                       String[] names = bt_pref.keys();
+                       for (int i = 0; i < names.length; i++) {
+                               String  name = names[i];
+                               String  addr = get_address(name);
+                               System.out.printf("Known device %s %s\n", name, addr);
+                               devices.add(new AltosBTDevice(name, addr));
+                       }
+               } catch (BackingStoreException be) {
+               } catch (IllegalStateException ie) {
+               }
+       }
+
+       public Iterator<AltosBTDevice> iterator() {
+               return devices.iterator();
+       }
+
+       private void flush() {
+               AltosPreferences.flush_preferences();
+       }
+
+       public void set(Iterable<AltosBTDevice> new_devices) {
+               for (AltosBTDevice old : devices) {
+                       boolean found = false;
+                       for (AltosBTDevice new_device : new_devices) {
+                               if (new_device.equals(old)) {
+                                       found = true;
+                                       break;
+                               }
+                       }
+                       if (!found)
+                               remove(old.getName());
+               }
+               devices = new LinkedList<AltosBTDevice>();
+               for (AltosBTDevice new_device : new_devices) {
+                       devices.add(new_device);
+                       set_address(new_device.getName(), new_device.getAddr());
+               }
+               flush();
+       }
+
+       public List<AltosDevice> list(int product) {
+               LinkedList<AltosDevice> list = new LinkedList<AltosDevice>();
+               for (AltosBTDevice device : devices) {
+                       if (device.matchProduct(product))
+                               list.add(device);
+               }
+               return list;
+       }
+
+       public AltosBTKnown() {
+               devices = new LinkedList<AltosBTDevice>();
+               bt_pref = AltosPreferences.bt_devices();
+               load();
+       }
+}
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