filtering of messages is run with delay to avoid repeated filtering

src/librssguard/gui/messagesview.cpp

@@ -659,6 +659,10 @@ void MessagesView::selectNextUnreadItem() {
 }
 
 void MessagesView::searchMessages(const QString& pattern) {
+  qDebugNN << LOGSEC_GUI
+           << "Running search of messages with pattern"
+           << QUOTE_W_SPACE_DOT(pattern);
+
 #if QT_VERSION < 0x050C00 // Qt < 5.12.0
   m_proxyModel->setFilterRegExp(pattern.toLower());
 #else

src/librssguard/gui/toolbars/messagestoolbar.cpp

@@ -7,10 +7,14 @@
 #include "miscellaneous/iconfactory.h"
 #include "miscellaneous/settings.h"
 
+#include <chrono>
 #include <QMenu>
+#include <QTimer>
 #include <QToolButton>
 #include <QWidgetAction>
 
+using namespace std::chrono_literals;
+
 MessagesToolBar::MessagesToolBar(const QString& title, QWidget* parent) : BaseToolBar(title, parent) {
   initializeSearchBox();
   initializeHighlighter();
@@ -101,6 +105,9 @@ void MessagesToolBar::handleMessageHighlighterChange(QAction* action) {
 }
 
 void MessagesToolBar::initializeSearchBox() {
+  m_tmrSearchPattern = new QTimer(this);
+  m_tmrSearchPattern->setSingleShot(true);
+
   m_txtSearchMessages = new BaseLineEdit(this);
   m_txtSearchMessages->setSizePolicy(QSizePolicy::Policy::Expanding, m_txtSearchMessages->sizePolicy().verticalPolicy());
   m_txtSearchMessages->setPlaceholderText(tr("Search articles"));
@@ -112,7 +119,10 @@ void MessagesToolBar::initializeSearchBox() {
   m_actionSearchMessages->setProperty("type", SEARCH_BOX_ACTION_NAME);
   m_actionSearchMessages->setProperty("name", tr("Article search box"));
 
-  connect(m_txtSearchMessages, &BaseLineEdit::textChanged, this, &MessagesToolBar::messageSearchPatternChanged);
+  connect(m_txtSearchMessages, &BaseLineEdit::textChanged, this, &MessagesToolBar::onSearchPatternChanged);
+  connect(m_tmrSearchPattern, &QTimer::timeout, this, [this]() {
+    emit messageSearchPatternChanged(m_searchPattern);
+  });
 }
 
 void MessagesToolBar::initializeHighlighter() {
@@ -155,3 +165,8 @@ QStringList MessagesToolBar::savedActions() const {
                                                                                                QString::SplitBehavior::SkipEmptyParts);
 #endif
 }
+
+void MessagesToolBar::onSearchPatternChanged(const QString& search_pattern) {
+  m_searchPattern = search_pattern;
+  m_tmrSearchPattern->start(700ms);
+}

src/librssguard/gui/toolbars/messagestoolbar.h

@@ -11,6 +11,7 @@ class BaseLineEdit;
 class QWidgetAction;
 class QToolButton;
 class QMenu;
+class QTimer;
 
 class MessagesToolBar : public BaseToolBar {
   Q_OBJECT
@@ -31,6 +32,7 @@ class MessagesToolBar : public BaseToolBar {
     void messageFilterChanged(MessagesModel::MessageHighlighter filter);
 
   private slots:
+    void onSearchPatternChanged(const QString& search_pattern);
     void handleMessageHighlighterChange(QAction* action);
 
   private:
@@ -43,6 +45,8 @@ class MessagesToolBar : public BaseToolBar {
     QMenu* m_menuMessageHighlighter;
     QWidgetAction* m_actionSearchMessages;
     BaseLineEdit* m_txtSearchMessages;
+    QTimer* m_tmrSearchPattern;
+    QString m_searchPattern;
 };
 
 #endif // NEWSTOOLBAR_H