1 files changed, 103 insertions, 0 deletions
diff --git a/altosui/AltosSiteMapCache.java b/altosui/AltosSiteMapCache.java
new file mode 100644
index 00000000..2e62cc45
--- /dev/null
+++ b/altosui/AltosSiteMapCache.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
+ *
+ * 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.awt.*;
+import java.awt.image.*;
+import java.awt.event.*;
+import javax.swing.*;
+import javax.imageio.ImageIO;
+import javax.swing.table.*;
+import java.io.*;
+import java.util.*;
+import java.text.*;
+import java.util.prefs.*;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class AltosSiteMapCache extends JLabel {
+	public static boolean fetchMap(File file, String url) {
+		URL u;
+
+		try {
+			u = new URL(url);
+		} catch (java.net.MalformedURLException e) {
+			return false;
+		}
+
+		byte[] data;
+		try {
+			URLConnection uc = u.openConnection();
+			int contentLength = uc.getContentLength();
+			InputStream in = new BufferedInputStream(uc.getInputStream());
+			int bytesRead = 0;
+			int offset = 0;
+			data = new byte[contentLength];
+			while (offset < contentLength) {
+				bytesRead = in.read(data, offset, data.length - offset);
+				if (bytesRead == -1)
+					break;
+				offset += bytesRead;
+			}
+			in.close();
+
+			if (offset != contentLength) {
+				return false;
+			}
+		} catch (IOException e) {
+			return false;
+		}
+
+		try {
+			FileOutputStream out = new FileOutputStream(file);
+			out.write(data);
+			out.flush();
+			out.close();
+		} catch (FileNotFoundException e) {
+			return false;
+		} catch (IOException e) {
+			if (file.exists()) {
+				file.delete();
+			}
+			return false;
+		}
+		return true;
+	}
+
+	public static ImageIcon fetchAndLoadMap(File pngfile, String url) {
+		if (!pngfile.exists()) {
+			if (!fetchMap(pngfile, url)) {
+				return null;
+			}
+		}
+		return loadMap(pngfile, url);
+	}
+
+	public static ImageIcon loadMap(File pngfile, String url) {
+		if (!pngfile.exists()) {
+			return null;
+		}
+
+		try {
+			return new ImageIcon(ImageIO.read(pngfile));
+		} catch (IOException e) {
+			System.out.printf("# IO error trying to load %s\n", pngfile);
+			return null;
+		}
+	}
+}