/*
 * Copyright 2012 - 2014 Benjamin Weiss
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.keyboardsurfer.android.widget.crouton;

import android.content.Context;
import android.graphics.Typeface;
import android.support.v4.util.LruCache;
import android.text.TextPaint;
import android.text.style.MetricAffectingSpan;

/**
 * Style a spannable with a custom {@link android.graphics.Typeface}.
 */
public class TypefaceSpan extends MetricAffectingSpan {
  /** An <code>LruCache</code> for previously loaded typefaces. */
  private static LruCache<String, Typeface> sTypefaceCache = new LruCache<String, Typeface>(5);

  private Typeface mTypeface;

  /**
   * Load the {@link android.graphics.Typeface} and apply to a spannable.
   */
  public TypefaceSpan(Context context, String typefaceName) {
    mTypeface = sTypefaceCache.get(typefaceName);

    if (mTypeface == null) {
      mTypeface = Typeface.createFromAsset(context.getApplicationContext()
          .getAssets(), String.format("%s", typefaceName));

      // Cache the loaded Typeface
      sTypefaceCache.put(typefaceName, mTypeface);
    }
  }

  @Override
  public void updateMeasureState(TextPaint p) {
    p.setTypeface(mTypeface);
  }

  @Override
  public void updateDrawState(TextPaint tp) {
    tp.setTypeface(mTypeface);
  }
}