Android Open Source - sigilui Font Loader

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Back to project page sigilui.

License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * This file is part of sigilui/*w w w .  ja  v a  2s.  c  o  m*/
 *
 * Sigilui 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.
 *
 * Sigilui 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.sigil.ui.font;

import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Typeface;
import android.util.Log;
import java.util.*;

/**
 * Class to load and cache fonts
 */
public class FontLoader {

  private static final String TAG = ""+FontLoader.class;
  
  private static final Map<String,Typeface> _fontMap = new HashMap<>(16);

  /**
   * Loads the requested font if not already loaded
   *
   * @param context a Context to access assets
   * @param path the path to the font
   * @param textStyle the integer representation of the text style (bold, italic, bolditalic)
   */
  public static final Typeface load( final Context context, String path, int textStyle ) {

    if ( null == path || 0 == path.length() ) {
      return null;
    }

    // build a postfix 
    String postfix = "";
    if ( ( Typeface.BOLD & textStyle ) == Typeface.BOLD ) {
      postfix = "bold";
    }
    if ( ( Typeface.ITALIC & textStyle ) == Typeface.ITALIC ) {
      postfix += "italic";
    }

    // normalize path
    if ( ! path.startsWith( "fonts/" ) ) {
      path = "fonts/"+path;
    }

    // create path for the styled version
    String styled = null;
    if ( ! "".equals( postfix ) ) {
      styled = "";
      String[] parts = path.split( "\\." );
      for ( int i=0; i<parts.length; i++ ) {
        styled += parts[i];
        if ( i == parts.length-2 ) {
          styled += "-";
          styled += postfix;
          styled += ".";
        }
      }
    }

    Log.d( TAG, "Searching for font: "+path+", styled="+styled+", textStyle="+textStyle );
    Typeface typeface = null;
    synchronized ( _fontMap ) {
      if ( null != styled ) {
        typeface = inflate( context, styled );
      }
      if ( null == typeface ) {
        if ( null != styled ) {
          Log.w( TAG, "Could not find styled variant "+styled+" - falling back to "+path );
        }
        typeface = inflate( context, path );
      }
    }
    return typeface;
  }

  /**
   * Inflate a font. <b>Must be called within a synchronized block around _fontMap</b>. Caches any
   * inflated fonts
   *
   * @param context a Context to access assets
   * @param path the path to the font
   */
  private static Typeface inflate( final Context context, final String path ) {
    Typeface typeface = _fontMap.get( path );
    if ( null == typeface ) {
      try {
        typeface = Typeface.createFromAsset( context.getAssets(), path );
      } catch ( Exception e ) {
        // don't really care
        Log.d( TAG, "Could not inflate "+path );
      }
      if ( null != typeface ) {
        _fontMap.put( path, typeface );
      }
    }
    return typeface;
  }
}

Java Source Code List

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