DroidFish: When receiving a fen file from an external program, let the user select which fen position to use.

DroidFish/AndroidManifest.xml

@@ -62,6 +62,10 @@
                   android:label="@string/load_scid_game_title"
                   android:configChanges="orientation">
         </activity>
+        <activity android:name=".activities.LoadFEN"
+                  android:label="@string/load_fen_title"
+                  android:configChanges="orientation">
+        </activity>
         <activity android:name=".activities.CPUWarning"
                   android:label="@string/cpu_warning_title">
         </activity>

DroidFish/res/layout-land/load_fen.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:orientation="horizontal">
+    <ListView
+        android:id="@android:id/list"
+        android:layout_weight="1"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:focusable="false">
+    </ListView>
+    <LinearLayout
+        android:orientation="vertical"
+        android:layout_weight="2"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:baselineAligned="false">
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_weight="1"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content">
+            <view
+                class="org.petero.droidfish.ChessBoardPlay"
+                android:id="@+id/loadfen_chessboard"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content">
+            </view>
+        </LinearLayout>
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_weight="1"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent">
+            <Button
+                android:id="@+id/loadfen_ok"
+                android:text="@android:string/ok"
+                android:layout_weight="1"
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent">
+            </Button>
+            <Button
+                android:id="@+id/loadfen_cancel"
+                android:text="@string/cancel"
+                android:layout_weight="1"
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent">
+            </Button>
+        </LinearLayout>
+    </LinearLayout>
+</LinearLayout>

DroidFish/res/layout/load_fen.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:orientation="vertical">
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:baselineAligned="false">
+        <LinearLayout
+            android:orientation="vertical"
+            android:layout_weight="1"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content">
+            <view
+                class="org.petero.droidfish.ChessBoardPlay"
+                android:id="@+id/loadfen_chessboard"
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent">
+            </view>
+        </LinearLayout>
+        <LinearLayout
+            android:orientation="vertical"
+            android:layout_weight="1"
+            android:layout_width="fill_parent"
+            android:layout_height="wrap_content">
+            <Button
+                android:text="@android:string/ok"
+                android:id="@+id/loadfen_ok"
+                android:layout_width="fill_parent"
+                android:layout_height="wrap_content">
+            </Button>
+            <Button
+                android:id="@+id/loadfen_cancel"
+                android:layout_width="fill_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/cancel">
+            </Button>
+        </LinearLayout>
+    </LinearLayout>
+    <ListView
+        android:id="@android:id/list"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:focusable="false">
+    </ListView>
+</LinearLayout>

DroidFish/res/values/strings.xml

@@ -76,6 +76,7 @@ you are not actively using the program.\
     <string name="pgn_load">Load</string>
     <string name="pgn_save">Save</string>
     <string name="reading_pgn_file">Reading PGN file</string>
+    <string name="reading_fen_file">Reading FEN file</string>
     <string name="reading_scid_file">Reading Scid file</string>
     <string name="new_file">&lt;New File&gt;</string>
     <string name="new_engine">&lt;New Engine&gt;</string>
@@ -111,6 +112,8 @@ you are not actively using the program.\
     <string name="load_next_game">Load Next Game</string>
     <string name="no_prev_game">No previous game</string>
     <string name="no_next_game">No next game</string>
+    <string name="no_prev_fen">No previous position</string>
+    <string name="no_next_fen">No next position</string>
     <string name="select_action">Select Action</string>
     <string name="flip_board">Flip Board</string>
     <string name="blind_mode">Blindfold mode</string>
@@ -160,6 +163,7 @@ you are not actively using the program.\
     <string name="save_game_title">Edit File / Save Game</string>
     <string name="save_game_hint">Select an existing game to control where to save the game. Long press an existing game to delete it.</string>
     <string name="load_scid_game_title">Load Scid Game</string>
+    <string name="load_fen_title">Load Position</string>
     <string name="cpu_warning_title">CPU Warning</string>
     <string name="failed_to_read_pgn_data">Failed to read PGN data</string>
     <string name="variation">Var:</string>

DroidFish/src/org/petero/droidfish/DroidFish.java

@@ -1,6 +1,6 @@
 /*
     DroidFish - An Android chess program.
-    Copyright (C) 2011-2012  Peter Österlund, peterosterlund2@gmail.com
+    Copyright (C) 2011-2013  Peter Österlund, peterosterlund2@gmail.com
     Copyright (C) 2012 Leo Mayer
 
     This program is free software: you can redistribute it and/or modify
@@ -22,7 +22,6 @@ package org.petero.droidfish;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
@@ -40,6 +39,7 @@ import org.petero.droidfish.activities.CPUWarning;
 import org.petero.droidfish.activities.EditBoard;
 import org.petero.droidfish.activities.EditPGNLoad;
 import org.petero.droidfish.activities.EditPGNSave;
+import org.petero.droidfish.activities.LoadFEN;
 import org.petero.droidfish.activities.LoadScid;
 import org.petero.droidfish.activities.Preferences;
 import org.petero.droidfish.book.BookOptions;
@@ -1161,6 +1161,7 @@ public class DroidFish extends Activity implements GUIInterface {
     static private final int RESULT_OI_PGN_SAVE = 4;
     static private final int RESULT_OI_PGN_LOAD = 5;
     static private final int RESULT_GET_FEN = 6;
+    static private final int RESULT_LOAD_FEN = 7;
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
@@ -1296,32 +1297,15 @@ public class DroidFish extends Activity implements GUIInterface {
                 String fen = data.getStringExtra(Intent.EXTRA_TEXT);
                 if (fen == null) {
                     String pathName = getFilePathFromUri(data.getData());
-                    if (pathName != null) {
+                    loadFENFromFile(pathName);
-                        InputStream is = null;
-                        try {
-                            is = new FileInputStream(pathName);
-                            fen = Util.readFromStream(is);
-                        } catch (FileNotFoundException e) {
-                            Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
-                        } finally {
-                            if (is != null)
-                                try { is.close(); } catch (IOException e) {}
-                        }
-                    }
-                }
-                if (fen != null) {
-                    try {
-                        ctrl.setFENOrPGN(fen);
-                    } catch (ChessParseError e) {
-                        // If FEN corresponds to illegal chess position, go into edit board mode.
-                        try {
-                            TextIO.readFEN(fen);
-                        } catch (ChessParseError e2) {
-                            if (e2.pos != null)
-                                startEditBoard(fen);
-                        }
                 }
+                setFenHelper(fen);
             }
+            break;
+        case RESULT_LOAD_FEN:
+            if (resultCode == RESULT_OK) {
+                String fen = data.getAction();
+                setFenHelper(fen);
             }
             break;
         }
@@ -2439,12 +2423,18 @@ public class DroidFish extends Activity implements GUIInterface {
                         i = new Intent(DroidFish.this, EditPGNLoad.class);
                         i.setAction("org.petero.droidfish.loadFilePrevGame");
                         i.putExtra("org.petero.droidfish.pathname", currPathName);
-                    } else {
+                        startActivityForResult(i, RESULT_LOAD_PGN);
+                    } else if (currFT == FT_SCID) {
                         i = new Intent(DroidFish.this, LoadScid.class);
                         i.setAction("org.petero.droidfish.loadScidPrevGame");
                         i.putExtra("org.petero.droidfish.pathname", currPathName);
-                    }
                         startActivityForResult(i, RESULT_LOAD_PGN);
+                    } else if (currFT == FT_FEN) {
+                        i = new Intent(DroidFish.this, LoadFEN.class);
+                        i.setAction("org.petero.droidfish.loadPrevFen");
+                        i.putExtra("org.petero.droidfish.pathname", currPathName);
+                        startActivityForResult(i, RESULT_LOAD_FEN);
+                    }
                     break;
                 }
             }
@@ -2483,12 +2473,18 @@ public class DroidFish extends Activity implements GUIInterface {
                         i = new Intent(DroidFish.this, EditPGNLoad.class);
                         i.setAction("org.petero.droidfish.loadFileNextGame");
                         i.putExtra("org.petero.droidfish.pathname", currPathName);
-                    } else {
+                        startActivityForResult(i, RESULT_LOAD_PGN);
+                    } else if (currFT == FT_SCID) {
                         i = new Intent(DroidFish.this, LoadScid.class);
                         i.setAction("org.petero.droidfish.loadScidNextGame");
                         i.putExtra("org.petero.droidfish.pathname", currPathName);
-                    }
                         startActivityForResult(i, RESULT_LOAD_PGN);
+                    } else if (currFT == FT_FEN) {
+                        i = new Intent(DroidFish.this, LoadFEN.class);
+                        i.setAction("org.petero.droidfish.loadNextFen");
+                        i.putExtra("org.petero.droidfish.pathname", currPathName);
+                        startActivityForResult(i, RESULT_LOAD_FEN);
+                    }
                     break;
                 }
             }
@@ -2874,6 +2870,7 @@ public class DroidFish extends Activity implements GUIInterface {
     final static int FT_NONE = 0;
     final static int FT_PGN  = 1;
     final static int FT_SCID = 2;
+    final static int FT_FEN  = 3;
 
     private final int currFileType() {
         if (gameMode.clocksActive())
@@ -2895,6 +2892,8 @@ public class DroidFish extends Activity implements GUIInterface {
         }
         case FT_SCID:
             return settings.getString("currentScidFile", "");
+        case FT_FEN:
+            return settings.getString("currentFENFile", "");
         default:
             return "";
         }
@@ -2952,6 +2951,36 @@ public class DroidFish extends Activity implements GUIInterface {
         startActivityForResult(i, RESULT_LOAD_PGN);
     }
 
+    /** Load a FEN position from a file. */
+    private final void loadFENFromFile(String pathName) {
+        if (pathName == null)
+            return;
+        Editor editor = settings.edit();
+        editor.putString("currentFENFile", pathName);
+        editor.putInt("currFT", FT_FEN);
+        editor.commit();
+        Intent i = new Intent(DroidFish.this, LoadFEN.class);
+        i.setAction("org.petero.droidfish.loadFen");
+        i.putExtra("org.petero.droidfish.pathname", pathName);
+        startActivityForResult(i, RESULT_LOAD_FEN);
+    }
+
+    private final void setFenHelper(String fen) {
+        if (fen == null)
+            return;
+        try {
+            ctrl.setFENOrPGN(fen);
+        } catch (ChessParseError e) {
+            // If FEN corresponds to illegal chess position, go into edit board mode.
+            try {
+                TextIO.readFEN(fen);
+            } catch (ChessParseError e2) {
+                if (e2.pos != null)
+                    startEditBoard(fen);
+            }
+        }
+    }
+
     @Override
     public void requestPromotePiece() {
         showDialog(PROMOTE_DIALOG);

DroidFish/src/org/petero/droidfish/activities/BufferedRandomAccessFileReader.java

@@ -0,0 +1,100 @@
+/*
+    DroidFish - An Android chess program.
+    Copyright (C) 2011-2013  Peter Österlund, peterosterlund2@gmail.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, either version 3 of the License, or
+    (at your option) any later version.
+
+    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, see <http://www.gnu.org/licenses/>.
+*/
+package org.petero.droidfish.activities;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+final class BufferedRandomAccessFileReader {
+    RandomAccessFile f;
+    byte[] buffer = new byte[8192];
+    long bufStartFilePos = 0;
+    int bufLen = 0;
+    int bufPos = 0;
+
+    BufferedRandomAccessFileReader(String fileName) throws FileNotFoundException {
+        f = new RandomAccessFile(fileName, "r");
+    }
+    final long length() throws IOException {
+        return f.length();
+    }
+    final long getFilePointer() throws IOException {
+        return bufStartFilePos + bufPos;
+    }
+    final void close() throws IOException {
+        f.close();
+    }
+
+    private final static int EOF = -1024;
+
+    final String readLine() throws IOException {
+        // First handle the common case where the next line is entirely
+        // contained in the buffer
+        for (int i = bufPos; i < bufLen; i++) {
+            byte b = buffer[i];
+            if ((b == '\n') || (b == '\r')) {
+                String line = new String(buffer, bufPos, i - bufPos);
+                for ( ; i < bufLen; i++) {
+                    b = buffer[i];
+                    if ((b != '\n') && (b != '\r')) {
+                        bufPos = i;
+                        return line;
+                    }
+                }
+                break;
+            }
+        }
+
+        // Generic case
+        byte[] lineBuf = new byte[8192];
+        int lineLen = 0;
+        int b;
+        while (true) {
+            b = getByte();
+            if (b == '\n' || b == '\r' || b == EOF)
+                break;
+            lineBuf[lineLen++] = (byte)b;
+            if (lineLen >= lineBuf.length)
+                break;
+        }
+        while (true) {
+            b = getByte();
+            if ((b != '\n') && (b != '\r')) {
+                if (b != EOF)
+                    bufPos--;
+                break;
+            }
+        }
+        if ((b == EOF) && (lineLen == 0))
+            return null;
+        else
+            return new String(lineBuf, 0, lineLen);
+    }
+
+    private final int getByte() throws IOException {
+        if (bufPos >= bufLen) {
+            bufStartFilePos = f.getFilePointer();
+            bufLen = f.read(buffer);
+            bufPos = 0;
+            if (bufLen <= 0)
+                return EOF;
+        }
+        return buffer[bufPos++];
+    }
+}

DroidFish/src/org/petero/droidfish/activities/EditBoard.java

@@ -1,6 +1,6 @@
 /*
     DroidFish - An Android chess program.
-    Copyright (C) 2011  Peter Österlund, peterosterlund2@gmail.com
+    Copyright (C) 2011-2013  Peter Österlund, peterosterlund2@gmail.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
@@ -18,10 +18,6 @@
 
 package org.petero.droidfish.activities;
 
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -606,6 +602,7 @@ public class EditBoard extends Activity {
     }
 
     static private final int RESULT_GET_FEN  = 0;
+    static private final int RESULT_LOAD_FEN = 1;
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
@@ -615,19 +612,17 @@ public class EditBoard extends Activity {
                 String fen = data.getStringExtra(Intent.EXTRA_TEXT);
                 if (fen == null) {
                     String pathName = DroidFish.getFilePathFromUri(data.getData());
-                    if (pathName != null) {
+                    Intent i = new Intent(EditBoard.this, LoadFEN.class);
-                        InputStream is = null;
+                    i.setAction("org.petero.droidfish.loadFen");
-                        try {
+                    i.putExtra("org.petero.droidfish.pathname", pathName);
-                            is = new FileInputStream(pathName);
+                    startActivityForResult(i, RESULT_LOAD_FEN);
-                            fen = Util.readFromStream(is);
-                        } catch (FileNotFoundException e) {
-                            Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
-                        } finally {
-                            if (is != null)
-                                try { is.close(); } catch (IOException e) {}
-                        }
                 }
+                setFEN(fen);
             }
+            break;
+        case RESULT_LOAD_FEN:
+            if (resultCode == RESULT_OK) {
+                String fen = data.getAction();
                 setFEN(fen);
             }
             break;

DroidFish/src/org/petero/droidfish/activities/FENFile.java

@@ -0,0 +1,108 @@
+/*
+    DroidFish - An Android chess program.
+    Copyright (C) 2013  Peter Österlund, peterosterlund2@gmail.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, either version 3 of the License, or
+    (at your option) any later version.
+
+    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, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.petero.droidfish.activities;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+
+import org.petero.droidfish.gamelogic.Pair;
+
+import android.app.Activity;
+import android.app.ProgressDialog;
+
+public class FENFile {
+    private final File fileName;
+
+    public FENFile(String fileName) {
+        this.fileName = new File(fileName);
+    }
+
+    public final String getName() {
+        return fileName.getAbsolutePath();
+    }
+
+    static final class FenInfo {
+        int gameNo;
+        String fen;
+
+        FenInfo(int gameNo, String fen) {
+            this.gameNo = gameNo;
+            this.fen = fen;
+        }
+
+        public String toString() {
+            StringBuilder info = new StringBuilder(128);
+            info.append(gameNo);
+            info.append(". ");
+            info.append(fen);
+            return info.toString();
+        }
+    }
+
+    public static enum FenInfoResult {
+        OK,
+        CANCEL,
+        OUT_OF_MEMORY;
+    }
+
+    /** Read all FEN strings (one per line) in a file. */
+    public final Pair<FenInfoResult,ArrayList<FenInfo>> getFenInfo(Activity activity,
+                                                                   final ProgressDialog progress) {
+        ArrayList<FenInfo> fensInFile = new ArrayList<FenInfo>();
+        try {
+            int percent = -1;
+            fensInFile.clear();
+            BufferedRandomAccessFileReader f = new BufferedRandomAccessFileReader(fileName.getAbsolutePath());
+            long fileLen = f.length();
+            long filePos = 0;
+            int fenNo = 1;
+            while (true) {
+                filePos = f.getFilePointer();
+                String line = f.readLine();
+                if (line == null)
+                    break; // EOF
+                if ((line.length() == 0) || (line.charAt(0) == '#'))
+                    continue;
+                FenInfo fi = new FenInfo(fenNo++, line.trim());
+                fensInFile.add(fi);
+                final int newPercent = (int)(filePos * 100 / fileLen);
+                if (newPercent > percent) {
+                    percent =  newPercent;
+                    if (progress != null) {
+                        activity.runOnUiThread(new Runnable() {
+                            public void run() {
+                                progress.setProgress(newPercent);
+                            }
+                        });
+                    }
+                }
+                if (Thread.currentThread().isInterrupted())
+                    return new Pair<FenInfoResult,ArrayList<FenInfo>>(FenInfoResult.CANCEL, null);
+            }
+            f.close();
+        } catch (IOException e) {
+        } catch (OutOfMemoryError e) {
+            fensInFile.clear();
+            fensInFile = null;
+            return new Pair<FenInfoResult,ArrayList<FenInfo>>(FenInfoResult.OUT_OF_MEMORY, null);
+        }
+        return new Pair<FenInfoResult,ArrayList<FenInfo>>(FenInfoResult.OK, fensInFile);
+    }
+}

DroidFish/src/org/petero/droidfish/activities/LoadFEN.java

@@ -0,0 +1,317 @@
+/*
+    DroidFish - An Android chess program.
+    Copyright (C) 2013  Peter Österlund, peterosterlund2@gmail.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, either version 3 of the License, or
+    (at your option) any later version.
+
+    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, see <http://www.gnu.org/licenses/>.
+*/
+
+package org.petero.droidfish.activities;
+
+import java.io.File;
+import java.util.ArrayList;
+
+import org.petero.droidfish.ChessBoardPlay;
+import org.petero.droidfish.ColorTheme;
+import org.petero.droidfish.R;
+import org.petero.droidfish.Util;
+import org.petero.droidfish.activities.FENFile.FenInfo;
+import org.petero.droidfish.activities.FENFile.FenInfoResult;
+import org.petero.droidfish.gamelogic.ChessParseError;
+import org.petero.droidfish.gamelogic.Pair;
+import org.petero.droidfish.gamelogic.Position;
+import org.petero.droidfish.gamelogic.TextIO;
+
+import android.app.Dialog;
+import android.app.ListActivity;
+import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.DialogInterface.OnCancelListener;
+import android.content.SharedPreferences.Editor;
+import android.content.res.Configuration;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.TextView;
+import android.widget.Toast;
+import android.widget.AdapterView.OnItemClickListener;
+
+public class LoadFEN extends ListActivity {
+    private static ArrayList<FenInfo> fensInFile = new ArrayList<FenInfo>();
+    private static boolean cacheValid = false;
+    private FENFile fenFile;
+    private ProgressDialog progress;
+    private FenInfo selectedFi = null;
+    private ArrayAdapter<FenInfo> aa = null;
+
+    private SharedPreferences settings;
+    private int defaultItem = 0;
+    private String lastFileName = "";
+    private long lastModTime = -1;
+
+    private Thread workThread = null;
+
+    private ChessBoardPlay cb;
+    private Button okButton;
+    private Button cancelButton;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        settings = PreferenceManager.getDefaultSharedPreferences(this);
+        Util.setFullScreenMode(this, settings);
+
+        if (savedInstanceState != null) {
+            defaultItem = savedInstanceState.getInt("defaultItem");
+            lastFileName = savedInstanceState.getString("lastFenFileName");
+            if (lastFileName == null) lastFileName = "";
+            lastModTime = savedInstanceState.getLong("lastFenModTime");
+        } else {
+            defaultItem = settings.getInt("defaultItem", 0);
+            lastFileName = settings.getString("lastFenFileName", "");
+            lastModTime = settings.getLong("lastFenModTime", 0);
+        }
+
+        Intent i = getIntent();
+        String action = i.getAction();
+        String fileName = i.getStringExtra("org.petero.droidfish.pathname");
+        if (action.equals("org.petero.droidfish.loadFen")) {
+            fenFile = new FENFile(fileName);
+            showDialog(PROGRESS_DIALOG);
+            final LoadFEN lfen = this;
+            workThread = new Thread(new Runnable() {
+                public void run() {
+                    if (!readFile())
+                        return;
+                    runOnUiThread(new Runnable() {
+                        public void run() {
+                            lfen.showList();
+                        }
+                    });
+                }
+            });
+            workThread.start();
+        } else if (action.equals("org.petero.droidfish.loadNextFen") ||
+                   action.equals("org.petero.droidfish.loadPrevFen")) {
+            fenFile = new FENFile(fileName);
+            boolean next = action.equals("org.petero.droidfish.loadNextFen");
+            final int loadItem = defaultItem + (next ? 1 : -1);
+            if (loadItem < 0) {
+                Toast.makeText(getApplicationContext(), R.string.no_prev_fen,
+                               Toast.LENGTH_SHORT).show();
+                setResult(RESULT_CANCELED);
+                finish();
+            } else {
+                workThread = new Thread(new Runnable() {
+                    public void run() {
+                        if (!readFile())
+                            return;
+                        runOnUiThread(new Runnable() {
+                            public void run() {
+                                if (loadItem >= fensInFile.size()) {
+                                    Toast.makeText(getApplicationContext(), R.string.no_next_fen,
+                                                   Toast.LENGTH_SHORT).show();
+                                    setResult(RESULT_CANCELED);
+                                    finish();
+                                } else {
+                                    defaultItem = loadItem;
+                                    sendBackResult(fensInFile.get(loadItem));
+                                }
+                            }
+                        });
+                    }
+                });
+                workThread.start();
+            }
+        } else { // Unsupported action
+            setResult(RESULT_CANCELED);
+            finish();
+        }
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putInt("defaultItem", defaultItem);
+        outState.putString("lastFenFileName", lastFileName);
+        outState.putLong("lastFenModTime", lastModTime);
+    }
+
+    @Override
+    protected void onPause() {
+        Editor editor = settings.edit();
+        editor.putInt("defaultItem", defaultItem);
+        editor.putString("lastFenFileName", lastFileName);
+        editor.putLong("lastFenModTime", lastModTime);
+        editor.commit();
+        super.onPause();
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (workThread != null) {
+            workThread.interrupt();
+            try {
+                workThread.join();
+            } catch (InterruptedException e) {
+            }
+            workThread = null;
+        }
+        super.onDestroy();
+    }
+
+    private final void showList() {
+        progress.dismiss();
+        setContentView(R.layout.load_fen);
+
+        cb = (ChessBoardPlay)findViewById(R.id.loadfen_chessboard);
+        okButton = (Button)findViewById(R.id.loadfen_ok);
+        cancelButton = (Button)findViewById(R.id.loadfen_cancel);
+
+        okButton.setEnabled(false);
+        okButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                if (selectedFi != null)
+                    sendBackResult(selectedFi);
+            }
+        });
+        cancelButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                setResult(RESULT_CANCELED);
+                finish();
+            }
+        });
+
+        Util.overrideFonts(findViewById(android.R.id.content));
+        aa = new ArrayAdapter<FenInfo>(this, R.layout.select_game_list_item, fensInFile) {
+            @Override
+            public View getView(int position, View convertView, ViewGroup parent) {
+                View view = super.getView(position, convertView, parent);
+                if (view instanceof TextView) {
+                    int fg = ColorTheme.instance().getColor(ColorTheme.FONT_FOREGROUND);
+                    ((TextView) view).setTextColor(fg);
+                }
+                return view;
+            }
+        };
+        setListAdapter(aa);
+        final ListView lv = getListView();
+        lv.setSelectionFromTop(defaultItem, 0);
+        lv.setFastScrollEnabled(true);
+        lv.setOnItemClickListener(new OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {
+                selectedFi = aa.getItem(pos);
+                if (selectedFi == null)
+                    return;
+                defaultItem = pos;
+                Position chessPos;
+                try {
+                    chessPos = TextIO.readFEN(selectedFi.fen);
+                } catch (ChessParseError e2) {
+                    chessPos = e2.pos;
+                }
+                if (chessPos != null) {
+                    cb.setPosition(chessPos);
+                    okButton.setEnabled(true);
+                }
+            }
+        });
+        lv.requestFocus();
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        Position pos = cb.pos;
+        showList();
+        cb.setPosition(pos);
+        okButton.setEnabled(selectedFi != null);
+    }
+
+    final static int PROGRESS_DIALOG = 0;
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        switch (id) {
+        case PROGRESS_DIALOG:
+            progress = new ProgressDialog(this);
+            progress.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
+            progress.setTitle(R.string.reading_fen_file);
+            progress.setMessage(getString(R.string.please_wait));
+            progress.setOnCancelListener(new OnCancelListener() {
+                @Override
+                public void onCancel(DialogInterface dialog) {
+                    Thread thr = workThread;
+                    if (thr != null)
+                        thr.interrupt();
+                }
+            });
+            return progress;
+        default:
+            return null;
+        }
+    }
+
+    private final boolean readFile() {
+        String fileName = fenFile.getName();
+        if (!fileName.equals(lastFileName))
+            defaultItem = 0;
+        long modTime = new File(fileName).lastModified();
+        if (cacheValid && (modTime == lastModTime) && fileName.equals(lastFileName))
+            return true;
+        fenFile = new FENFile(fileName);
+        Pair<FenInfoResult, ArrayList<FenInfo>> p = fenFile.getFenInfo(this, progress);
+        if (p.first != FenInfoResult.OK) {
+            fensInFile = new ArrayList<FenInfo>();
+            switch (p.first) {
+            case OUT_OF_MEMORY:
+                runOnUiThread(new Runnable() {
+                    public void run() {
+                        Toast.makeText(getApplicationContext(), R.string.file_too_large,
+                                       Toast.LENGTH_SHORT).show();
+                    }
+                });
+                break;
+            }
+            setResult(RESULT_CANCELED);
+            finish();
+            return false;
+        }
+        fensInFile = p.second;
+        cacheValid = true;
+        lastModTime = modTime;
+        lastFileName = fileName;
+        return true;
+    }
+
+    private final void sendBackResult(FenInfo fi) {
+        String fen = fi.fen;
+        if (fen != null) {
+            setResult(RESULT_OK, (new Intent()).setAction(fen));
+            finish();
+        } else {
+            setResult(RESULT_CANCELED);
+            finish();
+        }
+    }
+}

DroidFish/src/org/petero/droidfish/activities/PGNFile.java

@@ -1,6 +1,6 @@
 /*
     DroidFish - An Android chess program.
-    Copyright (C) 2011  Peter Österlund, peterosterlund2@gmail.com
+    Copyright (C) 2011-2013  Peter Österlund, peterosterlund2@gmail.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
@@ -19,7 +19,6 @@
 package org.petero.droidfish.activities;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.RandomAccessFile;
@@ -65,85 +64,6 @@ public class PGNFile {
         }
     }
 
-
-    static private final class BufferedRandomAccessFileReader {
-        RandomAccessFile f;
-        byte[] buffer = new byte[8192];
-        long bufStartFilePos = 0;
-        int bufLen = 0;
-        int bufPos = 0;
-
-        BufferedRandomAccessFileReader(String fileName) throws FileNotFoundException {
-            f = new RandomAccessFile(fileName, "r");
-        }
-        final long length() throws IOException {
-            return f.length();
-        }
-        final long getFilePointer() throws IOException {
-            return bufStartFilePos + bufPos;
-        }
-        final void close() throws IOException {
-            f.close();
-        }
-
-        private final static int EOF = -1024;
-
-        final String readLine() throws IOException {
-            // First handle the common case where the next line is entirely
-            // contained in the buffer
-            for (int i = bufPos; i < bufLen; i++) {
-                byte b = buffer[i];
-                if ((b == '\n') || (b == '\r')) {
-                    String line = new String(buffer, bufPos, i - bufPos);
-                    for ( ; i < bufLen; i++) {
-                        b = buffer[i];
-                        if ((b != '\n') && (b != '\r')) {
-                            bufPos = i;
-                            return line;
-                        }
-                    }
-                    break;
-                }
-            }
-
-            // Generic case
-            byte[] lineBuf = new byte[8192];
-            int lineLen = 0;
-            int b;
-            while (true) {
-                b = getByte();
-                if (b == '\n' || b == '\r' || b == EOF)
-                    break;
-                lineBuf[lineLen++] = (byte)b;
-                if (lineLen >= lineBuf.length)
-                    break;
-            }
-            while (true) {
-                b = getByte();
-                if ((b != '\n') && (b != '\r')) {
-                    if (b != EOF)
-                        bufPos--;
-                    break;
-                }
-            }
-            if ((b == EOF) && (lineLen == 0))
-                return null;
-            else
-                return new String(lineBuf, 0, lineLen);
-        }
-
-        private final int getByte() throws IOException {
-            if (bufPos >= bufLen) {
-                bufStartFilePos = f.getFilePointer();
-                bufLen = f.read(buffer);
-                bufPos = 0;
-                if (bufLen <= 0)
-                    return EOF;
-            }
-            return buffer[bufPos++];
-        }
-    }
-
     private final static class HeaderInfo {
         int gameNo;
         String event = "";