okular: 5-MOAD scan; okular-0001 CWE-407 fontReadingGotFont QList::indexOf O(F^2), 15.5x at F=1000

defects/okular-0001/patch/okular-0001.patch

@@ -0,0 +1,34 @@
+--- a/core/document_p.h
++++ b/core/document_p.h
+@@ -334,6 +334,7 @@ public:
+     QPointer<FontExtractionThread> m_fontThread;
+     bool m_fontsCached;
+     QSet<DocumentInfo::Key> m_documentInfoAskedKeys;
+     DocumentInfo m_documentInfo;
+     FontInfo::List m_fontsCache;
++    QSet<QString> m_fontsCacheKeys; // O(1) dedup set parallel to m_fontsCache
+
+     QSet<View *> m_views;
+
+--- a/core/document.cpp
++++ b/core/document.cpp
+@@ -1562,9 +1562,16 @@ void DocumentPrivate::fontReadingGotFont(const Okular::FontInfo &font)
+ {
+-    // Try to avoid duplicate fonts
+-    if (m_fontsCache.indexOf(font) == -1) {
++    // Try to avoid duplicate fonts — O(1) lookup via parallel key set
++    // Previously: m_fontsCache.indexOf(font) which is O(F) per call, O(F^2) total.
++    // Fix: build a composite key from all equality fields and use QSet for O(1) dedup.
++    const QString key = font.name()
++        + QLatin1Char('|') + font.substituteName()
++        + QLatin1Char('|') + QString::number(static_cast<int>(font.type()))
++        + QLatin1Char('|') + QString::number(static_cast<int>(font.embedType()))
++        + QLatin1Char('|') + font.file()
++        + QLatin1Char('|') + (font.canBeExtracted() ? QLatin1Char('1') : QLatin1Char('0'));
++    if (!m_fontsCacheKeys.contains(key)) {
++        m_fontsCacheKeys.insert(key);
+         m_fontsCache.append(font);
+
+         Q_EMIT m_parent->gotFont(font);
+     }
+ }