feat: add RXValidator

a QRegularExpression validator with Unicode support

Needed for status-im/status-desktop#8115

vendor/DOtherSide/lib/CMakeLists.txt

@@ -35,7 +35,7 @@ macro(add_target name type)
     endif()
 
     # for DOtherSide.pc
-    set(PC_REQUIRES "Qt5Core, Qt5Gui, Qt5Widgets, Qt5Qml, Qt5Quick, Qt5Network, Qt5DBus, Qt5Multimedia SortFilterProxyModel")
+    set(PC_REQUIRES "Qt5Core, Qt5Gui, Qt5Widgets, Qt5Qml, Qt5Quick, Qt5Network, Qt5DBus, Qt5Multimedia, SortFilterProxyModel")
     if (${Qt5QuickControls2_FOUND})
         target_link_libraries(${name} PRIVATE Qt5::QuickControls2)
         set(PC_REQUIRES "${PC_REQUIRES}, Qt5QuickControls2")

vendor/DOtherSide/lib/include/DOtherSide/Status/RXValidator.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <QValidator>
+
+// A QValidator built around QRegularExpression, but with Unicode support
+// (RegularExpressionValidator doesn't expose this to QML)
+
+class RXValidator : public QValidator
+{
+    Q_OBJECT
+    Q_PROPERTY(QRegularExpression regularExpression READ regularExpression WRITE setRegularExpression NOTIFY regularExpressionChanged)
+
+public:
+    RXValidator(QObject* parent = nullptr);
+
+    // helper QML function
+    Q_INVOKABLE bool test(QString input) const;
+
+protected:
+    QValidator::State validate(QString &input, int &pos) const override;
+
+signals:
+    void regularExpressionChanged(const QRegularExpression &re);
+
+private:
+    QRegularExpression regularExpression() const;
+    void setRegularExpression(const QRegularExpression &re);
+
+    QRegularExpression m_rx;
+};

vendor/DOtherSide/lib/src/DOtherSide.cpp

@@ -72,6 +72,7 @@
 #include "DOtherSide/Status/KeychainManager.h"
 #include "DOtherSide/Status/SoundManager.h"
 #include "DOtherSide/Status/QClipboardProxy.h"
+#include "DOtherSide/Status/RXValidator.h"
 #include "DOtherSide/DosSpellchecker.h"
 
 #include <qqmlsortfilterproxymodeltypes.h>
@@ -85,6 +86,7 @@ void register_meta_types()
     qmlRegisterType<StatusSyntaxHighlighterHelper>("DotherSide", 0 , 1, "StatusSyntaxHighlighter");
     qmlRegisterType<SpellChecker>("DotherSide", 0, 1, "SpellChecker");
     qmlRegisterSingletonType<QClipboardProxy>("DotherSide", 0 , 1, "QClipboardProxy", &QClipboardProxy::qmlInstance);
+    qmlRegisterType<RXValidator>("DotherSide", 0, 1, "RXValidator");
     qqsfpm::registerTypes();
 }
 

vendor/DOtherSide/lib/src/Status/RXValidator.cpp

@@ -0,0 +1,44 @@
+#include "DOtherSide/Status/RXValidator.h"
+
+RXValidator::RXValidator(QObject* parent)
+    : QValidator(parent)
+{
+}
+
+bool RXValidator::test(QString input) const
+{
+    int dummy_pos = 0;
+    return validate(input, dummy_pos) == QValidator::Acceptable;
+}
+
+QRegularExpression RXValidator::regularExpression() const
+{
+    return m_rx;
+}
+
+void RXValidator::setRegularExpression(const QRegularExpression& re)
+{
+    if (m_rx != re) {
+        m_rx = re;
+        m_rx.setPatternOptions(re.patternOptions() | QRegularExpression::UseUnicodePropertiesOption);
+        m_rx.setPattern(QRegularExpression::anchoredPattern(re.pattern()));
+        emit regularExpressionChanged(m_rx);
+        emit changed();
+    }
+}
+
+QValidator::State RXValidator::validate(QString& input, int& pos) const
+{
+    if (m_rx.pattern().isEmpty())
+        return Acceptable;
+
+    const QRegularExpressionMatch m = m_rx.match(input, 0, QRegularExpression::PartialPreferCompleteMatch);
+    if (m.hasMatch())
+        return Acceptable;
+
+    if (input.isEmpty() || m.hasPartialMatch())
+        return Intermediate;
+
+    pos = input.size();
+    return Invalid;
+}