Close: chris2511#366 Not Responding after upgrade

cache the results of visibility check as long as the search text remains.
This function is called many times when displaying the data,
even if the search string does not change.

lib/db_base.cpp

@@ -553,6 +553,7 @@ void db_base::updateItem(pki_base *pki, const QString &name,
 	TransDone(e);
 	pki->setIntName(name);
 	pki->setComment(comment);
+	pki->recheckVisibility();
 
 	QModelIndex i, j;
 	i = index(pki);

lib/pki_base.cpp

@@ -84,8 +84,9 @@ QString pki_base::getUnderlinedName() const
 
 bool pki_base::visible() const
 {
-	if (limitPattern.isEmpty())
+	if (limitPattern.isEmpty() || limitPattern == lastPattern)
 		return true;
+	lastPattern = limitPattern;
 	return getIntName().contains(limitPattern) ||
 		comment.contains(limitPattern);
 }

lib/pki_base.h

@@ -68,6 +68,7 @@ class pki_base : public QObject
 		virtual QByteArray PEM_comment() const;
 		virtual void collect_properties(QMap<QString, QString> &) const;
 		QList<pki_base*> childItems;
+		mutable QRegExp lastPattern;
 
 	public:
 		enum msg_type {
@@ -89,12 +90,17 @@ class pki_base : public QObject
 
 		QList<pki_base*> getChildItems() const;
 		void clear();
+		void recheckVisibility()
+		{
+			lastPattern = QRegExp();
+		}
 		QString getIntName() const
 		{
 			return desc;
 		}
 		void setFilename(const QString &s)
 		{
+			recheckVisibility();
 			filename = s;
 		}
 		QString getFilename() const
@@ -110,6 +116,7 @@ class pki_base : public QObject
 		QString getUnderlinedName() const;
 		void setIntName(const QString &d)
 		{
+			recheckVisibility();
 			desc = d;
 		}
 		virtual void autoIntName(const QString &file);
@@ -119,6 +126,7 @@ class pki_base : public QObject
 		}
 		void setComment(const QString &c)
 		{
+			recheckVisibility();
 			comment = c;
 		}
 		QVariant getSqlItemId() const