Android Open Source - bitfynd-wallet-android Monetary Spannable

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2014 the original author or authors.
 *//from  w  ww  .  j  av a 2  s.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 de.schildbach.wallet.util;

import static com.google.common.base.Preconditions.checkArgument;

import java.util.regex.Matcher;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import org.bitcoinj.core.Monetary;
import org.bitcoinj.utils.MonetaryFormat;

import android.graphics.Typeface;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.RelativeSizeSpan;
import android.text.style.StyleSpan;
import de.schildbach.wallet.Constants;

/**
 * @author Andreas Schildbach
 */
public final class MonetarySpannable extends SpannableString
{
  public MonetarySpannable(final MonetaryFormat format, final boolean signed, @Nullable final Monetary monetary)
  {
    super(format(format, signed, monetary));
  }

  public MonetarySpannable(final MonetaryFormat format, @Nullable final Monetary monetary)
  {
    super(format(format, false, monetary));
  }

  private static CharSequence format(final MonetaryFormat format, final boolean signed, final Monetary monetary)
  {
    if (monetary == null)
      return "";

    checkArgument(monetary.signum() >= 0 || signed);

    if (signed)
      return format.negativeSign(Constants.CURRENCY_MINUS_SIGN).positiveSign(Constants.CURRENCY_PLUS_SIGN).format(monetary);
    else
      return format.format(monetary);
  }

  public MonetarySpannable applyMarkup(@Nullable final Object prefixSpan1, @Nullable final Object prefixSpan2,
      @Nullable final Object insignificantSpan)
  {
    applyMarkup(this, prefixSpan1, prefixSpan2, BOLD_SPAN, insignificantSpan);
    return this;
  }

  public static final Object BOLD_SPAN = new StyleSpan(Typeface.BOLD);
  public static final RelativeSizeSpan SMALLER_SPAN = new RelativeSizeSpan(0.85f);

  public static void applyMarkup(@Nonnull final Spannable spannable, @Nullable final Object prefixSpan1, @Nullable final Object prefixSpan2,
      @Nullable final Object significantSpan, @Nullable final Object insignificantSpan)
  {
    if (prefixSpan1 != null)
      spannable.removeSpan(prefixSpan1);
    if (prefixSpan2 != null)
      spannable.removeSpan(prefixSpan2);
    if (significantSpan != null)
      spannable.removeSpan(significantSpan);
    if (insignificantSpan != null)
      spannable.removeSpan(insignificantSpan);

    final Matcher m = Formats.PATTERN_MONETARY_SPANNABLE.matcher(spannable);
    if (m.find())
    {
      int i = 0;

      if (m.group(Formats.PATTERN_GROUP_PREFIX) != null)
      {
        final int end = m.end(Formats.PATTERN_GROUP_PREFIX);
        if (prefixSpan1 != null)
          spannable.setSpan(prefixSpan1, i, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        if (prefixSpan2 != null)
          spannable.setSpan(prefixSpan2, i, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        i = end;
      }

      if (m.group(Formats.PATTERN_GROUP_SIGNIFICANT) != null)
      {
        final int end = m.end(Formats.PATTERN_GROUP_SIGNIFICANT);
        if (significantSpan != null)
          spannable.setSpan(significantSpan, i, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        i = end;
      }

      if (m.group(Formats.PATTERN_GROUP_INSIGNIFICANT) != null)
      {
        final int end = m.end(Formats.PATTERN_GROUP_INSIGNIFICANT);
        if (insignificantSpan != null)
          spannable.setSpan(insignificantSpan, i, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        i = end;
      }
    }
  }
}

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