package com.alcoapps.actionbarextras;

import org.appcelerator.titanium.util.TiUIHelper;

import android.content.Context;
import android.graphics.Paint;
import android.graphics.Typeface;
import androidx.collection.LruCache;
import android.text.Spannable;
import android.text.TextPaint;
import android.text.style.MetricAffectingSpan;

/*
 * Copyright 2013 Simple Finance Corporation. All rights reserved.
 * 
 * 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.
 */
 
/**
 * Style a {@link Spannable} with a custom {@link Typeface}.
 * 
 * @author Tristan Waddington
 */
public class TypefaceSpan extends MetricAffectingSpan {
      /** An <code>LruCache</code> for previously loaded typefaces. */
    private static LruCache<String, Typeface> sTypefaceCache =
            new LruCache<String, Typeface>(12);
 
    private Typeface mTypeface;
 
    /**
     * Load the {@link Typeface} and apply to a {@link Spannable}.
     */
    public TypefaceSpan(Context context, String typefaceName) {
        mTypeface = sTypefaceCache.get(typefaceName);
        if (mTypeface == null) {
        	mTypeface = TiUIHelper.toTypeface( context, typefaceName );
 
            // Cache the loaded Typeface
            sTypefaceCache.put(typefaceName, mTypeface);
        }
    }
 
    @Override
    public void updateMeasureState(TextPaint p) {
        p.setTypeface(mTypeface);
        
        // Note: This flag is required for proper typeface rendering
        p.setFlags(p.getFlags() | Paint.SUBPIXEL_TEXT_FLAG);
    }
 
    @Override
    public void updateDrawState(TextPaint tp) {
        tp.setTypeface(mTypeface);
        
        // Note: This flag is required for proper typeface rendering
        tp.setFlags(tp.getFlags() | Paint.SUBPIXEL_TEXT_FLAG);
    }
}