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Allow striking through text with ~~

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Similar to spoilers, some Markdown flavors like GitHub's or Discord's
allow you to strike through text with ~~. Normally, the only way to do
this on most Matrix clients (including Element) is surrounding text with
<del> tags. As expected, no one knows how to do this.

So now NeoChat supports the ~~ syntax. We can reuse the existing spoiler
parser for this after making it generic. I have added new test cases for
this syntax. This does not affect the quick format bar yet.
This commit is contained in:
Joshua Goins
2025-05-08 14:50:24 -04:00
parent 14cbbd394f
commit 4757ac11dc
2 changed files with 61 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
autotests/texthandlertest.cpp
View File

@@ -43,8 +43,8 @@ private Q_SLOTS:
void sendCustomEmoji();
void sendCustomEmojiCode_data();
void sendCustomEmojiCode();
void sendSpoilerTags_data();
void sendSpoilerTags();
void sendCustomTags_data();
void sendCustomTags();
void receiveSpacelessSelfClosingTag();
void receiveStripReply();
@@ -251,20 +251,28 @@ void TextHandlerTest::sendCustomEmojiCode()
QCOMPARE(testTextHandler.handleSendText(), testOutputString);
}
void TextHandlerTest::sendSpoilerTags_data()
void TextHandlerTest::sendCustomTags_data()
{
QTest::addColumn<QString>("testInputString");
QTest::addColumn<QString>("testOutputString");
QTest::newRow("incomplete") << u"||test"_s << u"||test"_s;
QTest::newRow("complete") << u"||test||"_s << u"<span data-mx-spoiler>test</span>"_s;
QTest::newRow("multiple") << u"||apple||banana||pear||"_s << u"<span data-mx-spoiler>apple</span>banana<span data-mx-spoiler>pear</span>"_s;
QTest::newRow("inside code block") << u"```||apple||```"_s << u"<code>||apple||</code>"_s;
QTest::newRow("outside code block") << u"||apple|| ```||banana||``` ||pear||"_s
<< u"<span data-mx-spoiler>apple</span> <code>||banana||</code> <span data-mx-spoiler>pear</span>"_s;
// spoiler
QTest::newRow("incomplete spoiler") << u"||test"_s << u"||test"_s;
QTest::newRow("complete spoiler") << u"||test||"_s << u"<span data-mx-spoiler>test</span>"_s;
QTest::newRow("multiple spoiler") << u"||apple||banana||pear||"_s << u"<span data-mx-spoiler>apple</span>banana<span data-mx-spoiler>pear</span>"_s;
QTest::newRow("inside code block spoiler") << u"```||apple||```"_s << u"<code>||apple||</code>"_s;
QTest::newRow("outside code block spoiler") << u"||apple|| ```||banana||``` ||pear||"_s
<< u"<span data-mx-spoiler>apple</span> <code>||banana||</code> <span data-mx-spoiler>pear</span>"_s;
// strikethrough
QTest::newRow("incomplete strikethrough") << u"~~test"_s << u"~~test"_s;
QTest::newRow("complete strikethrough") << u"~~test~~"_s << u"<del>test</del>"_s;
QTest::newRow("inside code block strikethrough") << u"```~~apple~~```"_s << u"<code>~~apple~~</code>"_s;
QTest::newRow("outside code block strikethrough") << u"~~apple~~ ```~~banana~~``` ~~pear~~"_s
<< u"<del>apple</del> <code>~~banana~~</code> <del>pear</del>"_s;
}
void TextHandlerTest::sendSpoilerTags()
void TextHandlerTest::sendCustomTags()
{
QFETCH(QString, testInputString);
QFETCH(QString, testOutputString);

78
src/libneochat/texthandler.cpp
View File

@@ -706,45 +706,53 @@ QString TextHandler::customMarkdownToHtml(const QString &stringIn)
{
QString buffer = stringIn;
qsizetype beginCodeBlockTag = buffer.indexOf(u"<code>"_s);
qsizetype endCodeBlockTag = buffer.indexOf(u"</code>"_s, beginCodeBlockTag + 1);
const auto processSyntax = [&buffer](const QString &syntax, const QString &beginTag, const QString &endTag) {
qsizetype beginCodeBlockTag = buffer.indexOf(u"<code>"_s);
qsizetype endCodeBlockTag = buffer.indexOf(u"</code>"_s, beginCodeBlockTag + 1);
// Indesx to search from
qsizetype lastPos = 0;
while (true) {
const qsizetype pos = buffer.indexOf(u"||"_s, lastPos);
if (pos == -1) {
break;
// Index to search from
qsizetype lastPos = 0;
while (true) {
const qsizetype pos = buffer.indexOf(syntax, lastPos);
if (pos == -1) {
break;
}
// If we're inside a code block, ignore and move the search past the code block
const bool validCodeBlock = beginCodeBlockTag != -1 && endCodeBlockTag != -1;
if (validCodeBlock && pos > beginCodeBlockTag && pos < endCodeBlockTag) {
lastPos = endCodeBlockTag + 5;
continue;
}
qsizetype nextPos = buffer.indexOf(syntax, pos + 1);
if (nextPos == -1) {
break;
}
// Replace the beginning syntax
buffer.replace(pos, 2, beginTag);
// Update positions and re-search since the underlying text buffer changed
nextPos = buffer.indexOf(syntax, pos + 1);
beginCodeBlockTag = buffer.indexOf(u"<code>"_s, pos + 1);
endCodeBlockTag = buffer.indexOf(u"</code>"_s, beginCodeBlockTag + 1);
// Now replace the end syntax
buffer.replace(nextPos, 2, endTag);
// Move the search pointer past this point.
// Not technically needed in most cases since we replaced the original tag, but needed for code blocks
// which still have the characters.
lastPos = nextPos + 2;
}
};
// If we're inside of a code block, ignore and move the search past the code block
const bool validCodeBlock = beginCodeBlockTag != -1 && endCodeBlockTag != -1;
if (validCodeBlock && pos > beginCodeBlockTag && pos < endCodeBlockTag) {
lastPos = endCodeBlockTag + 5;
continue;
}
// spoilers
processSyntax(u"||"_s, u"<span data-mx-spoiler>"_s, u"</span>"_s);
qsizetype nextPos = buffer.indexOf(u"||"_s, pos + 1);
if (nextPos == -1) {
break;
}
// Replace the begin ||
buffer.replace(pos, 2, QStringLiteral("<span data-mx-spoiler>"));
// Update positions and re-search since the underlying text buffer changed
nextPos = buffer.indexOf(u"||"_s, pos + 1);
beginCodeBlockTag = buffer.indexOf(u"<code>"_s, pos + 1);
endCodeBlockTag = buffer.indexOf(u"</code>"_s, beginCodeBlockTag + 1);
// Now replace the end ||
buffer.replace(nextPos, 2, QStringLiteral("</span>"));
// Move the search pointer past this point.
// Not technically needed in most cases since we replaced the original tag, but needed for code blocks
// which still have the characters.
lastPos = nextPos + 2;
}
// strikethrough
processSyntax(u"~~"_s, u"<del>"_s, u"</del>"_s);
return buffer;
}