--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project_files/Android-build/SDL-android-project/src/org/hedgewars/hedgeroid/ChatlogAdapter.java	Sat Aug 18 00:47:51 2012 +0200
@@ -0,0 +1,95 @@
+package org.hedgewars.hedgeroid;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.hedgewars.hedgeroid.netplay.MessageLog.Observer;
+
+import android.content.Context;
+import android.text.method.LinkMovementMethod;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AbsListView.LayoutParams;
+import android.widget.BaseAdapter;
+import android.widget.TextView;
+
+/**
+ * Optimization: ListView is smart enough to try re-using the same view for an item
+ * with the same ID, but it still calls getView for those items when the list changes.
+ * Since lines with a given ID never change in our chatlog, we can avoid the effort
+ * of TextView.setText in many cases by checking if the view is already set up for the
+ * line with the right ID - but to do that, the view needs to remember the ID it's
+ * holding the text for. That's what the LoglineView does. 
+ */
+class LoglineView extends TextView {
+	long chatlogId = -1;
+	
+	public LoglineView(Context context) {
+		super(context);
+	}
+}
+
+public class ChatlogAdapter extends BaseAdapter implements Observer {
+	long idOffset = 0;
+	private List<CharSequence> log = new ArrayList<CharSequence>();
+	private Context context;
+	
+	public ChatlogAdapter(Context context) {
+		this.context = context;
+	}
+	
+	public int getCount() {
+		return log.size();
+	}
+
+	public Object getItem(int position) {
+		return log.get(position);
+	}
+
+	public long getItemId(int position) {
+		return position+idOffset;
+	}
+
+	public boolean hasStableIds() {
+		return true;
+	}
+
+	public void clear() {
+		idOffset += log.size();
+		log.clear();
+		notifyDataSetChanged();
+	}
+	
+	public void lineAdded(CharSequence text) {
+		log.add(text);
+		notifyDataSetChanged();
+	}
+	
+	public void lineRemoved() {
+		log.remove(0);
+		idOffset += 1;
+		notifyDataSetChanged();
+	}
+	
+	public void setLog(Collection<CharSequence> log) {
+		idOffset += log.size();
+		this.log = new ArrayList<CharSequence>(log);
+		notifyDataSetChanged();
+	}
+	
+	public View getView(int position, View convertView, ViewGroup parent) {
+		LoglineView v = (LoglineView)convertView;
+		if (v == null) {
+			v = new LoglineView(context);
+			v.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
+			v.setMovementMethod(LinkMovementMethod.getInstance());
+		}
+		long id = getItemId(position);
+		if(id != v.chatlogId) {
+			v.setText(log.get(position));
+			v.chatlogId = id;
+		}
+		return v;
+	}
+}
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