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/*
* Nextcloud Notes application
*
* @author Mario Danic
* Copyright (C) 2018 Mario Danic <mario@lovelyhq.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 it.niedermann.owncloud.notes.util;
import android.content.Context;
import android.graphics.Color;
import android.text.Spannable;
import android.text.TextPaint;
import android.text.TextUtils;
import android.text.style.MetricAffectingSpan;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import it.niedermann.owncloud.notes.R;
public class DisplayUtils {
private DisplayUtils() {
}
public static Spannable searchAndColor(Spannable spannable, CharSequence searchText, Context context, @Nullable Integer current) {
CharSequence text = spannable.toString();
Object[] spansToRemove = spannable.getSpans(0, text.length(), Object.class);
for (Object span : spansToRemove) {
if (span instanceof SearchSpan)
spannable.removeSpan(span);
}
if (TextUtils.isEmpty(text) || TextUtils.isEmpty(searchText)) {
return spannable;
}
Matcher m = Pattern.compile(searchText.toString(), Pattern.CASE_INSENSITIVE | Pattern.LITERAL)
.matcher(text);
int i = 1;
while (m.find()) {
int start = m.start();
int end = m.end();
spannable.setSpan(new SearchSpan(context, (current != null && i == current)), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
i++;
}
return spannable;
}
static class SearchSpan extends MetricAffectingSpan {
private final boolean current;
private final int bgColorPrimary;
private final int bgColorSecondary;
SearchSpan(Context context, boolean current) {
this.current = current;
this.bgColorPrimary = context.getResources().getColor(R.color.bg_search_primary);
this.bgColorSecondary = context.getResources().getColor(R.color.bg_search_secondary);
}
@Override
public void updateDrawState(TextPaint tp) {
tp.bgColor = current ? bgColorPrimary : bgColorSecondary;
tp.setColor(current ? (getForeground(Integer.toHexString(tp.bgColor)) ? Color.WHITE : Color.BLACK) : bgColorPrimary);
tp.setFakeBoldText(true);
}
@Override
public void updateMeasureState(@NonNull TextPaint tp) {
tp.setFakeBoldText(true);
}
}
public static boolean getForeground(String backgroundColorHex) {
return ((float) (
0.2126 * Integer.valueOf(backgroundColorHex.substring(1, 3), 16)
+ 0.7152 * Integer.valueOf(backgroundColorHex.substring(3, 5), 16)
+ 0.0722 * Integer.valueOf(backgroundColorHex.substring(5, 7), 16)
) < 140);
}
}
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