74 lines
2.4 KiB
Java
74 lines
2.4 KiB
Java
/*
|
|
* Copyright (C) 2014-2016 Dominik Schürmann <dominik@dominikschuermann.de>
|
|
*
|
|
* 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 org.sufficientlysecure.keychain.ui.util;
|
|
|
|
import android.content.Context;
|
|
import android.text.Spannable;
|
|
import android.text.style.ForegroundColorSpan;
|
|
|
|
import org.sufficientlysecure.keychain.R;
|
|
|
|
import java.util.regex.Matcher;
|
|
import java.util.regex.Pattern;
|
|
|
|
public class Highlighter {
|
|
private Context mContext;
|
|
private String mQuery;
|
|
|
|
public Highlighter(Context context, String query) {
|
|
mContext = context;
|
|
mQuery = query;
|
|
}
|
|
|
|
public Spannable highlight(CharSequence text) {
|
|
Spannable highlight = Spannable.Factory.getInstance().newSpannable(text);
|
|
|
|
if (mQuery == null) {
|
|
return highlight;
|
|
}
|
|
|
|
String queryPattern = buildPatternFromQuery(mQuery);
|
|
Pattern pattern = Pattern.compile("(" + queryPattern + ")", Pattern.CASE_INSENSITIVE);
|
|
Matcher matcher = pattern.matcher(text);
|
|
|
|
int colorEmphasis = FormattingUtils.getColorFromAttr(mContext, R.attr.colorEmphasis);
|
|
|
|
while (matcher.find()) {
|
|
highlight.setSpan(new ForegroundColorSpan(colorEmphasis),
|
|
matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
return highlight;
|
|
}
|
|
|
|
private static String buildPatternFromQuery(String mQuery) {
|
|
String chunks[] = mQuery.split(" *, *");
|
|
boolean firstChunk = true;
|
|
StringBuilder patternPiece = new StringBuilder();
|
|
for (int i = 0; i < chunks.length; ++i) {
|
|
patternPiece.append(Pattern.quote(chunks[i]));
|
|
if (firstChunk) {
|
|
firstChunk = false;
|
|
continue;
|
|
}
|
|
patternPiece.append('|');
|
|
}
|
|
return patternPiece.toString();
|
|
}
|
|
}
|