Android Open Source - typewriter Font Manipulator

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Back to project page typewriter.

License

The source code is released under:

Apache License

Java Source Code

package com.aeclarke.typewriter;
/*  ww  w.j  a v a  2s . co  m*/
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import android.app.Activity;

import com.google.typography.font.sfntly.Font;
import com.google.typography.font.sfntly.FontFactory;
import com.google.typography.font.sfntly.Tag;
import com.google.typography.font.sfntly.table.core.CMap;
import com.google.typography.font.sfntly.table.core.CMapTable;
import com.google.typography.font.sfntly.table.core.CMapTable.CMapId;
import com.google.typography.font.tools.subsetter.CMapTableBuilder;
import com.google.typography.font.sfntly.Font.Builder;

public class FontManipulator {

  private String fontPath;

  public FontManipulator(String fontPath) {
    this.fontPath = fontPath;
  }

  public Font applyCaesarCypherToFont(Font font) throws IOException, FileNotFoundException {
    Builder builder = FontFactory.getInstance().loadFontsForBuilding(new FileInputStream(fontPath))[0];
    Map<Integer, Integer> characterMapping = new HashMap<Integer, Integer>();
    CMap cmap = font.<CMapTable>getTable(Tag.cmap).cmap(CMapId.getInstance(0,3));
    
    for (Iterator<Integer> cmapIterator = cmap.iterator(); cmapIterator.hasNext();) {
      int characterId = cmapIterator.next();
      int glyphId  = cmap.glyphId(characterId);
      if(characterId < 100) {
        characterMapping.put(characterId, glyphId + 1);
      } else {
        characterMapping.put(characterId, glyphId);
      }
    }
    
    CMapTableBuilder cMapTableBuilder = new CMapTableBuilder(builder, characterMapping);
    cMapTableBuilder.build();      
    return builder.build();
  }
  
  public Font[] loadFont(File file) throws IOException {
    FontFactory fontFactory = FontFactory.getInstance();
    fontFactory.fingerprintFont(true);
    FileInputStream is = null;
    try {
      is = new FileInputStream(file);
      return fontFactory.loadFonts(is);
    } finally {
      if (is != null) {
        is.close();
      }
    }
  }

  public void saveFontAs(Font font, String path, Activity activty) throws IOException {
    backupFont(path);
    String tempFontFile = activty.getFilesDir().getAbsolutePath() + "/temp_font.ttf";
    FontFactory fontFactory = FontFactory.getInstance();
    fontFactory.fingerprintFont(true);
    FileOutputStream os = null;
    try {
      os = new FileOutputStream(tempFontFile);
      fontFactory.serializeFont(font, os);
      runWithSu(new String[] {"rm " + path,
                  "mv " + tempFontFile + " " + path,
                  "chmod 644 " + path});
    } finally {
      if (os != null) {
        os.flush();
        os.close();
      }
    }
  }
  
  public void backupFont() {
    backupFont(fontPath);
  }

  private void backupFont(String pathToBackup) {
    try {
      runWithSu(new String[] {"mount -o remount,rw /system;",
                  "cp " + pathToBackup + " " + pathToBackup + ".bkp",
                  "chmod 644 " + pathToBackup});
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  private void runWithSu(String[] commands) throws IOException {
    Process p = Runtime.getRuntime().exec("su");
    DataOutputStream os = new DataOutputStream(p.getOutputStream());            
    for (String tmpCmd : commands) {
      os.writeBytes(tmpCmd+"\n");
    }           
    os.writeBytes("exit\n");  
    os.flush();
  }
}

Java Source Code List

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