Merge pull request #1688 from Nheko-Reborn/glitchtext

Add a glitch text command

man/nheko.1.adoc

@@ -215,6 +215,12 @@ Redacts a specific event.
 */roomnick* _<roomname>_::
 Change your nickname in a single room.
 
+*/glitch* _<message>_::
+Applies a glitch effect to the given _message_. Beware that this will break mentions, HTML, and some Markdown in your message.
+
+*/gradualglitch* _<message>_::
+Applies a progressively more severe glitch effect to the _message_. Again, this will break mentions, HTML, and some Markdown.
+
 === Emoticons
 
 */shrug* _[message]_::

src/CommandCompleter.cpp

@@ -91,6 +91,10 @@ CommandCompleter::data(const QModelIndex &index, int role) const
                 return QStringLiteral("/rainfall ");
             case Msgtype:
                 return QStringLiteral("/msgtype ");
+            case Glitch:
+                return QStringLiteral("/glitch ");
+            case GradualGlitch:
+                return QStringLiteral("/gradualglitch ");
             case Goto:
                 return QStringLiteral("/goto ");
             case ConvertToDm:
@@ -170,6 +174,10 @@ CommandCompleter::data(const QModelIndex &index, int role) const
                 return tr("/msgtype <msgtype> [message]");
             case Goto:
                 return tr("/goto <message reference>");
+            case Glitch:
+                return tr("/glitch <message>");
+            case GradualGlitch:
+                return tr("/gradualglitch <message>");
             case ConvertToDm:
                 return QStringLiteral("/converttodm");
             case ConvertToRoom:
@@ -245,6 +253,10 @@ CommandCompleter::data(const QModelIndex &index, int role) const
                 return tr("Send a message with rain.");
             case Msgtype:
                 return tr("Send a message with a custom message type.");
+            case Glitch:
+                return tr("Send a message with a glitch effect.");
+            case GradualGlitch:
+                return tr("Send a message that gradually glitches.");
             case Goto:
                 return tr("Go to a specific message using an event id, index or matrix: link");
             case ConvertToDm:

src/CommandCompleter.h

@@ -48,6 +48,8 @@ public:
         RainbowConfetti,
         Rainfall,
         Msgtype,
+        Glitch,
+        GradualGlitch,
         Goto,
         ConvertToDm,
         ConvertToRoom,

src/Utils.cpp

@@ -16,6 +16,7 @@
 #include <QGuiApplication>
 #include <QImageReader>
 #include <QProcessEnvironment>
+#include <QRandomGenerator64>
 #include <QScreen>
 #include <QSettings>
 #include <QStringBuilder>
@@ -2012,3 +2013,61 @@ utils::removeExpiredEvents()
 
     ApplyEventExpiration::next(std::move(asus));
 }
+
+namespace {
+static const QList<QChar> diacritics = []() {
+    QList<QChar> ret;
+    for (wchar_t c = u'\u0300'; c <= u'\u036f'; ++c)
+        ret.append(QChar(c));
+    return ret;
+}();
+}
+
+QString
+utils::glitchText(const QString &text)
+{
+    QString result;
+    for (int i = 0; i < text.size(); ++i) {
+        result.append(text.at(i));
+        if (QRandomGenerator64::global()->bounded(0, 100) >= 25)
+            result.append(
+              diacritics.at(QRandomGenerator64::global()->bounded(0, diacritics.size())));
+    }
+    return result;
+}
+
+QString
+utils::graduallyGlitchText(const QString &text)
+{
+    QString result;
+
+    const int noGlitch     = text.size() * 0.5;
+    const int someGlitch   = text.size() * 0.8;
+    const int lotsOfGlitch = text.size() * 0.95;
+
+    for (int i = 0; i < text.size(); ++i) {
+        result.append(text.at(i));
+
+        if (i < noGlitch) // first 40% of text is normal
+            continue;
+        else if (i < someGlitch) // next 25% is progressively glitchier
+        {
+            if (QRandomGenerator64::global()->bounded(noGlitch, someGlitch) <
+                noGlitch + (i - noGlitch) * 0.05)
+                result.append(
+                  diacritics.at(QRandomGenerator64::global()->bounded(0, diacritics.size())));
+        } else if (i < lotsOfGlitch) { // oh no, it's spreading!
+            if (QRandomGenerator64::global()->bounded(someGlitch, lotsOfGlitch) < i)
+                result.append(
+                  diacritics.at(QRandomGenerator64::global()->bounded(0, diacritics.size())));
+        } else { // just give up, your computer is cursed now
+            do {
+                if (QRandomGenerator64::global()->bounded(text.size() / 5, text.size()) < i)
+                    result.append(
+                      diacritics.at(QRandomGenerator64::global()->bounded(0, diacritics.size())));
+            } while (QRandomGenerator64::global()->bounded(0, 100) < 35);
+        }
+    }
+
+    return result;
+}

src/Utils.h

@@ -205,4 +205,10 @@ updateSpaceVias();
 
 void
 removeExpiredEvents();
+
+QString
+glitchText(const QString &text);
+
+QString
+graduallyGlitchText(const QString &text);
 }

src/timeline/InputBar.cpp

@@ -238,6 +238,8 @@ InputBar::updateTextContentProperties(const QString &t)
                                              QStringLiteral("rainbowconfetti"),
                                              QStringLiteral("rainfall"),
                                              QStringLiteral("msgtype"),
+                                             QStringLiteral("glitch"),
+                                             QStringLiteral("gradualglitch"),
                                              QStringLiteral("goto"),
                                              QStringLiteral("converttodm"),
                                              QStringLiteral("converttoroom"),
@@ -918,6 +920,10 @@ InputBar::command(const QString &command, QString args)
         rainfall(args);
     } else if (command == QLatin1String("msgtype")) {
         customMsgtype(args.section(' ', 0, 0), args.section(' ', 1, -1));
+    } else if (command == QLatin1String("glitch")) {
+        message(utils::glitchText(args));
+    } else if (command == QLatin1String("gradualglitch")) {
+        message(utils::graduallyGlitchText(args));
     } else if (command == QLatin1String("goto")) {
         // Goto has three different modes:
         // 1 - Going directly to a given event ID