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/*
* Copyright (c) 2018, Daniel Gultsch All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package de.pixart.messenger.ui.util;
import android.os.Build;
import android.text.Editable;
import android.text.util.Linkify;
import java.util.Locale;
import de.pixart.messenger.ui.text.FixedURLSpan;
import de.pixart.messenger.utils.GeoHelper;
import de.pixart.messenger.utils.Patterns;
import de.pixart.messenger.utils.XmppUri;
import static java.lang.Character.isAlphabetic;
public class MyLinkify {
private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = (matcher, url) -> {
if (url == null) {
return null;
}
final String lcUrl = url.toLowerCase(Locale.US);
if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
return removeTrailingBracket(url);
} else {
return "http://" + removeTrailingBracket(url);
}
};
private static String removeTrailingBracket(final String url) {
int numOpenBrackets = 0;
for (char c : url.toCharArray()) {
if (c == '(') {
++numOpenBrackets;
} else if (c == ')') {
--numOpenBrackets;
}
}
if (numOpenBrackets != 0 && url.charAt(url.length() - 1) == ')') {
return url.substring(0, url.length() - 1);
} else {
return url;
}
}
private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = (cs, start, end) -> {
if (start > 0) {
if (cs.charAt(start - 1) == '@' || cs.charAt(start - 1) == '.'
|| cs.subSequence(Math.max(0, start - 3), start).equals("://")) {
return false;
}
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
if (end < cs.length()) {
// Reject strings that were probably matched only because they contain a dot followed by
// by some known TLD (see also comment for WORD_BOUNDARY in Patterns.java)
if (isAlphabetic(cs.charAt(end - 1)) && isAlphabetic(cs.charAt(end))) {
return false;
}
}
}
return true;
};
private static final Linkify.MatchFilter XMPPURI_MATCH_FILTER = (s, start, end) -> {
XmppUri uri = new XmppUri(s.subSequence(start, end).toString());
return uri.isJidValid();
};
private static boolean isAlphabetic(final int code) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
return Character.isAlphabetic(code);
}
switch (Character.getType(code)) {
case Character.UPPERCASE_LETTER:
case Character.LOWERCASE_LETTER:
case Character.TITLECASE_LETTER:
case Character.MODIFIER_LETTER:
case Character.OTHER_LETTER:
case Character.LETTER_NUMBER:
return true;
default:
return false;
}
}
public static void addLinks(Editable body, boolean includeGeo) {
Linkify.addLinks(body, Patterns.XMPP_PATTERN, "xmpp", XMPPURI_MATCH_FILTER, null);
Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
if (includeGeo) {
Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
}
FixedURLSpan.fix(body);
}
}
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