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Add whitespaces around smileys.

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Only replace smileys with an image when they are surrounded by whitespaces.
This fixes smileys in links and other text that happen to include the sequence for a smiley.
This commit is contained in:
sehraf 2016-01-05 14:58:41 +01:00
parent f1f111f096
commit 54f9912c32
2 changed files with 49 additions and 3 deletions
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44
retroshare-gui/src/util/HandleRichText.cpp
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@ -105,7 +105,33 @@ void RsHtml::initEmoticons(const QHash< QString, QString >& hash)
continue;
}
defEmbedImg.smileys.insert(smile, it.value());
newRE += "(" + QRegExp::escape(smile) + ")|";
// add space around smileys
newRE += "(?:^|\\s)(" + QRegExp::escape(smile) + ")(?:$|\\s)|";
// explanations:
// (?:^|\s)(*smiley*)(?:$|\s)
//
// (?:^|\s) Non-capturing group
// 1st Alternative: ^
// ^ assert position at start of the string
// 2nd Alternative: \s
// \s match any white space character [\r\n\t\f ]
//
// 1st Capturing group (*smiley*)
// *smiley* matches the characters *smiley* literally (case sensitive)
//
// (?:$|\s) Non-capturing group
// 1st Alternative: $
// $ assert position at end of the string
// 2nd Alternative: \s
// \s match any white space character [\r\n\t\f ]
/*
* TODO
* a better version is:
* (?<=^|\s)(*smile*)(?=$|\s) using the lookbehind/lookahead operator instead of non-capturing groups.
* This solves the problem that spaces are matched, too (see workaround in RsHtml::embedHtml)
* This is not supported by Qt4!
*/
}
newRE.chop(1); // remove last |
defEmbedImg.myRE.setPattern(newRE);
@ -312,7 +338,21 @@ void RsHtml::embedHtml(QTextDocument *textDocument, QDomDocument& doc, QDomEleme
{
insertedTag = doc.createElement("img");
const EmbedInHtmlImg& embedImg = static_cast<const EmbedInHtmlImg&>(embedInfos);
insertedTag.setAttribute("src", embedImg.smileys[embedInfos.myRE.cap(0)]);
// embedInfos.myRE.cap(0) may include spaces at the end/beginning -> trim!
insertedTag.setAttribute("src", embedImg.smileys[embedInfos.myRE.cap(0).trimmed()]);
/*
* NOTE
* Trailing spaces are matched, too. This leads to embedInfos.myRE.matchedLength() being incorrect.
* This hack reduces nextPos by one so that the new value of currentPos is calculated corretly.
* This is needed to match multiple smileys since the leading whitespace in front of a smiley is required!
*
* This can be avoided by using Qt5 (see comment in RsHtml::initEmoticons)
*
* NOTE
* Preceding spaces are also matched and removed.
*/
if(embedInfos.myRE.cap(0).endsWith(' '))
nextPos--;
}
break;
}