Implements #1676, custom themes

- Adds the selection of a base folder for map themes to settings
- Reworks the map menu to allow selection of a custom theme
- Implements a reusable version of listDir to get a list of files

1 files changed, 64 insertions, 0 deletions

diff --git a/main/src/cgeo/geocaching/utils/FileUtils.java b/main/src/cgeo/geocaching/utils/FileUtils.java
new file mode 100644
index 0000000..6fefc02
--- /dev/null
+++ b/main/src/cgeo/geocaching/utils/FileUtils.java
@@ -0,0 +1,64 @@
+package cgeo.geocaching.utils;
+
+import org.apache.commons.lang3.ArrayUtils;
+
+import android.os.Handler;
+import android.os.Message;
+
+import java.io.File;
+import java.util.List;
+
+/**
+ * Utiliy class for files
+ *
+ * @author rsudev
+ *
+ */
+public class FileUtils {
+
+    public static void listDir(List<File> result, File directory, FileSelector chooser, Handler feedBackHandler) {
+
+        if (directory == null || !directory.isDirectory() || !directory.canRead()
+                || result == null
+                || chooser == null) {
+            return;
+        }
+
+        final File[] files = directory.listFiles();
+
+        if (ArrayUtils.isNotEmpty(files)) {
+            for (File file : files) {
+                if (chooser.shouldEnd()) {
+                    return;
+                }
+                if (!file.canRead()) {
+                    continue;
+                }
+                String name = file.getName();
+                if (file.isFile()) {
+                    if (chooser.isSelected(file)) {
+                        result.add(file); // add file to list
+                    }
+                } else if (file.isDirectory()) {
+                    if (name.charAt(0) == '.') {
+                        continue; // skip hidden directories
+                    }
+                    if (name.length() > 16) {
+                        name = name.substring(0, 14) + '…';
+                    }
+                    if (feedBackHandler != null) {
+                        feedBackHandler.sendMessage(Message.obtain(feedBackHandler, 0, name));
+                    }
+
+                    listDir(result, file, chooser, feedBackHandler); // go deeper
+                }
+            }
+        }
+    }
+
+    public static abstract class FileSelector {
+        public abstract boolean isSelected(File file);
+
+        public abstract boolean shouldEnd();
+    }
+}