fix(StatusSyntaxHighlighter): code block fixes

- make the code bg/fg color configurable
- simplify the code, no need for an extra helper class
- fix code(block) regexes

Needed for https://github.com/status-im/status-desktop/issues/8649

vendor/DOtherSide/lib/include/DOtherSide/DOtherSideStatusSyntaxHighlighter.h

@@ -1,50 +1,61 @@
-#ifndef STATUSSYNTAXHIGHLIGHTER_H
-#define STATUSSYNTAXHIGHLIGHTER_H
+#pragma once
 
-#include <QSyntaxHighlighter>
-#include <QTextCharFormat>
+#include <QQmlParserStatus>
 #include <QRegularExpression>
+#include <QSyntaxHighlighter>
 
 class QQuickTextDocument;
+class QTextCharFormat;
 
-class StatusSyntaxHighlighter : public QSyntaxHighlighter
+class StatusSyntaxHighlighter : public QSyntaxHighlighter, public QQmlParserStatus
 {
     Q_OBJECT
 
+    Q_PROPERTY(QQuickTextDocument* quickTextDocument READ quickTextDocument WRITE setQuickTextDocument NOTIFY
+                   quickTextDocumentChanged REQUIRED)
+    Q_PROPERTY(QColor codeBackgroundColor READ codeBackgroundColor WRITE setCodeBackgroundColor NOTIFY
+                   codeBackgroundColorChanged REQUIRED)
+    Q_PROPERTY(QColor codeForegroundColor READ codeForegroundColor WRITE setCodeForegroundColor NOTIFY
+                   codeForegroundColorChanged REQUIRED)
+
+    Q_INTERFACES(QQmlParserStatus)
+
 public:
-    StatusSyntaxHighlighter(QTextDocument *parent = nullptr);
+    explicit StatusSyntaxHighlighter(QObject* parent = nullptr);
+
+    QQuickTextDocument* quickTextDocument() const;
+    void setQuickTextDocument(QQuickTextDocument* quickTextDocument);
 
 protected:
+    void classBegin() override{};
+    void componentComplete() override;
     void highlightBlock(const QString& text) override;
 
+signals:
+    void quickTextDocumentChanged();
+    void codeBackgroundColorChanged();
+    void codeForegroundColorChanged();
+
 private:
+    QQuickTextDocument* m_quicktextdocument{nullptr};
+
+    QColor m_codeBackgroundColor;
+    QColor codeBackgroundColor() const;
+    void setCodeBackgroundColor(const QColor& color);
+
+    QColor m_codeForegroundColor;
+    QColor codeForegroundColor() const;
+    void setCodeForegroundColor(const QColor& color);
+
     struct HighlightingRule
     {
         QRegularExpression pattern;
         QTextCharFormat format;
     };
-    QVector<HighlightingRule> highlightingRules;
+    QVector<HighlightingRule> highlightingRules{5};
 
     QTextCharFormat singlelineBoldFormat;
     QTextCharFormat singleLineItalicFormat;
-    QTextCharFormat singlelineCodeBlockFormat;
+    QTextCharFormat codeFormat;
     QTextCharFormat singleLineStrikeThroughFormat;
-    QTextCharFormat multiLineCodeBlockFormat;
 };
-
-class StatusSyntaxHighlighterHelper : public QObject {
-  Q_OBJECT
-  Q_PROPERTY(QQuickTextDocument *quickTextDocument READ quickTextDocument WRITE
-                 setQuickTextDocument NOTIFY quickTextDocumentChanged)
-public:
-  StatusSyntaxHighlighterHelper(QObject *parent = nullptr)
-      : QObject(parent), m_quicktextdocument(nullptr) {}
-  QQuickTextDocument *quickTextDocument() const;
-  void setQuickTextDocument(QQuickTextDocument *quickTextDocument);
-signals:
-  void quickTextDocumentChanged();
-
-private:
-  QQuickTextDocument *m_quicktextdocument;
-};
-#endif // STATUSSYNTAXHIGHLIGHTER_H

vendor/DOtherSide/lib/src/DOtherSide.cpp

@@ -84,7 +84,7 @@ void register_meta_types()
 {
     qRegisterMetaType<QVector<int>>();
     qmlRegisterType<StatusWindow>("DotherSide", 0 , 1, "StatusWindow");
-    qmlRegisterType<StatusSyntaxHighlighterHelper>("DotherSide", 0 , 1, "StatusSyntaxHighlighter");
+    qmlRegisterType<StatusSyntaxHighlighter>("DotherSide", 0 , 1, "StatusSyntaxHighlighter");
     qmlRegisterSingletonType<QClipboardProxy>("DotherSide", 0 , 1, "QClipboardProxy", &QClipboardProxy::qmlInstance);
     qmlRegisterType<RXValidator>("DotherSide", 0, 1, "RXValidator");
     qqsfpm::registerTypes();

vendor/DOtherSide/lib/src/DOtherSideStatusSyntaxHighlighter.cpp

@@ -1,10 +1,12 @@
 #include "DOtherSide/DOtherSideStatusSyntaxHighlighter.h"
-#include <QQuickTextDocument>
-#include <Qt>
-#include <QBrush>
 
-StatusSyntaxHighlighter::StatusSyntaxHighlighter(QTextDocument *parent)
+#include <QQuickTextDocument>
+
+StatusSyntaxHighlighter::StatusSyntaxHighlighter(QObject* parent)
     : QSyntaxHighlighter(parent)
+{ }
+
+void StatusSyntaxHighlighter::componentComplete()
 {
     HighlightingRule rule;
 
@@ -22,14 +24,6 @@ StatusSyntaxHighlighter::StatusSyntaxHighlighter(QTextDocument *parent)
     highlightingRules.append(rule);
     //ITALIC
 
-//CODE
-    singlelineCodeBlockFormat.setFontFamily("Roboto Mono");
-    singlelineCodeBlockFormat.setBackground(QBrush(Qt::lightGray));
-    rule.pattern = QRegularExpression(QStringLiteral("\\`(.*?)\\`"));
-    rule.format = singlelineCodeBlockFormat;
-    highlightingRules.append(rule);
-//CODE
-
     //STRIKETHROUGH
     singleLineStrikeThroughFormat.setFontStrikeOut(true);
     rule.pattern = QRegularExpression(QStringLiteral("\\~\\~(.*?)\\~\\~"));
@@ -37,35 +31,73 @@ StatusSyntaxHighlighter::StatusSyntaxHighlighter(QTextDocument *parent)
     highlightingRules.append(rule);
     //STRIKETHROUGH
 
-//CODE BLOCK
-    multiLineCodeBlockFormat.setFontFamily("Roboto Mono");
-    multiLineCodeBlockFormat.setBackground(QBrush(Qt::lightGray));
-    rule.pattern = QRegularExpression(QStringLiteral("\\`\\`\\`(.*?)\\`\\`\\`"));
-    rule.format = multiLineCodeBlockFormat;
+    //CODE (`foo`)
+    codeFormat.setFontFamily(QStringLiteral("Roboto Mono"));
+    codeFormat.setBackground(m_codeBackgroundColor);
+    codeFormat.setForeground(m_codeForegroundColor);
+    rule.pattern = QRegularExpression(QStringLiteral("\\`{1}(.+)\\`{1}"),
+                                      // to not match single backtick pair inside a triple backtick block below
+                                      QRegularExpression::InvertedGreedinessOption);
+    rule.format = codeFormat;
+    highlightingRules.append(rule);
+    //CODE
+
+    //CODEBLOCK (```\nfoo\nbar```)
+    rule.pattern = QRegularExpression(QStringLiteral("\\`{3}(.+)\\`{3}"));
+    rule.format = codeFormat;
     highlightingRules.append(rule);
     //CODEBLOCK
 }
 
 void StatusSyntaxHighlighter::highlightBlock(const QString& text)
 {
-    for (const HighlightingRule &rule : qAsConst(highlightingRules)) {
-        QRegularExpressionMatchIterator matchIterator = rule.pattern.globalMatch(text);
-        while (matchIterator.hasNext()) {
-            QRegularExpressionMatch match = matchIterator.next();
+    for(const HighlightingRule& rule : qAsConst(highlightingRules))
+    {
+        QRegularExpressionMatchIterator matchIterator =
+            rule.pattern.globalMatch(text, 0, QRegularExpression::PartialPreferCompleteMatch);
+        while(matchIterator.hasNext())
+        {
+            const QRegularExpressionMatch match = matchIterator.next();
             setFormat(match.capturedStart(), match.capturedLength(), rule.format);
         }
     }
-    setCurrentBlockState(0);
 }
 
-QQuickTextDocument *StatusSyntaxHighlighterHelper::quickTextDocument() const {
+QQuickTextDocument* StatusSyntaxHighlighter::quickTextDocument() const
+{
     return m_quicktextdocument;
 }
 
-void StatusSyntaxHighlighterHelper::setQuickTextDocument(
-        QQuickTextDocument *quickTextDocument) {
+void StatusSyntaxHighlighter::setQuickTextDocument(QQuickTextDocument* quickTextDocument)
+{
+    if(!quickTextDocument) return;
+    if(quickTextDocument == m_quicktextdocument) return;
+
     m_quicktextdocument = quickTextDocument;
-    if (m_quicktextdocument) {
-        new StatusSyntaxHighlighter(m_quicktextdocument->textDocument());
+    setDocument(m_quicktextdocument->textDocument());
+    emit quickTextDocumentChanged();
 }
+
+QColor StatusSyntaxHighlighter::codeBackgroundColor() const
+{
+    return m_codeBackgroundColor;
+}
+
+void StatusSyntaxHighlighter::setCodeBackgroundColor(const QColor& color)
+{
+    if(color == m_codeBackgroundColor) return;
+    m_codeBackgroundColor = color;
+    emit codeBackgroundColorChanged();
+}
+
+QColor StatusSyntaxHighlighter::codeForegroundColor() const
+{
+    return m_codeForegroundColor;
+}
+
+void StatusSyntaxHighlighter::setCodeForegroundColor(const QColor& color)
+{
+    if(color == m_codeForegroundColor) return;
+    m_codeForegroundColor = color;
+    emit codeForegroundColorChanged();
 }