Changing of size via wheel is now persistent for message viewer.

src/gui/messagepreviewer.cpp

@@ -29,11 +29,7 @@
 #include <QToolTip>
 
 
-MessagePreviewer::MessagePreviewer(QWidget *parent) : QWidget(parent),
-  m_ui(new Ui::MessagePreviewer) {
-  m_ui->setupUi(this);
-  m_ui->m_txtMessage->viewport()->setAutoFillBackground(true);
-
+void MessagePreviewer::createConnections() {
   connect(m_ui->m_txtMessage, &QTextBrowser::anchorClicked, [=](const QUrl &url) {
     if (!url.isEmpty()) {
       // User clicked some URL. Open it in external browser or download?
@@ -65,11 +61,6 @@ MessagePreviewer::MessagePreviewer(QWidget *parent) : QWidget(parent),
                        tr("Selected hyperlink is invalid."));
     }
   });
-
-  m_toolBar = new QToolBar(this);
-  m_toolBar->setOrientation(Qt::Vertical);
-  m_ui->m_layout->addWidget(m_toolBar, 0, 0, -1, 1);
-
   connect(m_actionMarkRead = m_toolBar->addAction(qApp->icons()->fromTheme("mail-mark-read"), tr("Mark message as read")),
           &QAction::triggered,
           this,
@@ -89,6 +80,18 @@ MessagePreviewer::MessagePreviewer(QWidget *parent) : QWidget(parent),
 
     QToolTip::showText(QCursor::pos(), tr("Click this link to download it or open it with external browser."), this);
   });
+  connect(m_ui->m_txtMessage, &MessageTextBrowser::imageRequested, this, &MessagePreviewer::addMessageImage);
+}
+
+MessagePreviewer::MessagePreviewer(QWidget *parent) : QWidget(parent),
+  m_ui(new Ui::MessagePreviewer), m_messageImages(QStringList()) {
+  m_ui->setupUi(this);
+  m_ui->m_txtMessage->viewport()->setAutoFillBackground(true);
+  m_toolBar = new QToolBar(this);
+  m_toolBar->setOrientation(Qt::Vertical);
+  m_ui->m_layout->addWidget(m_toolBar, 0, 0, -1, 1);
+
+  createConnections();
 
   m_actionSwitchImportance->setCheckable(true);
 
@@ -111,6 +114,7 @@ void MessagePreviewer::reloadFontSettings() {
 
 void MessagePreviewer::clear() {
   m_ui->m_txtMessage->clear();
+  m_messageImages.clear();
 
   hide();
 }
@@ -118,18 +122,23 @@ void MessagePreviewer::clear() {
 void MessagePreviewer::loadMessage(const Message &message, RootItem *root) {
   m_message = message;
   m_root = root;
+  m_messageImages.clear();
 
   if (!m_root.isNull()) {
-    updateButtons();
     m_actionSwitchImportance->setChecked(m_message.m_isImportant);
     m_ui->m_txtMessage->setHtml(prepareHtmlForMessage(m_message));
 
+    updateButtons();
     show();
 
     m_ui->m_txtMessage->verticalScrollBar()->triggerAction(QScrollBar::SliderToMinimum);
   }
 }
 
+void MessagePreviewer::addMessageImage(const QString &image_url) {
+  m_messageImages.append(image_url);
+}
+
 void MessagePreviewer::markMessageAsRead() {
   if (!m_root.isNull()) {
     if (m_root->getParentServiceRoot()->onBeforeSetMessagesRead(m_root.data(),

src/gui/messagepreviewer.h

@@ -48,6 +48,7 @@ class MessagePreviewer : public QWidget {
     void loadMessage(const Message &message, RootItem *root);
 
   private slots:
+    void addMessageImage(const QString &image_url);
     void markMessageAsRead();
     void markMessageAsUnread();
     void switchMessageImportance(bool checked);
@@ -56,6 +57,7 @@ class MessagePreviewer : public QWidget {
     void requestMessageListReload(bool mark_current_as_read);
 
   private:
+        void createConnections();
     void updateButtons();
     QString prepareHtmlForMessage(const Message &message);
 
@@ -63,6 +65,7 @@ class MessagePreviewer : public QWidget {
     QScopedPointer<Ui::MessagePreviewer> m_ui;
     Message m_message;
     QPointer<RootItem> m_root;
+    QStringList m_messageImages;
 
     QAction *m_actionMarkRead;
     QAction *m_actionMarkUnread;

src/gui/messagetextbrowser.cpp

@@ -28,3 +28,8 @@ QVariant MessageTextBrowser::loadResource(int type, const QUrl &name) {
       return QVariant();
   }
 }
+
+void MessageTextBrowser::wheelEvent(QWheelEvent *e) {
+  QTextBrowser::wheelEvent(e);
+  qApp->settings()->setValue(GROUP(Messages), Messages::PreviewerFontStandard, font().toString());
+}

src/gui/messagetextbrowser.h

@@ -17,6 +17,9 @@ class MessageTextBrowser : public QTextBrowser {
   signals:
     void imageRequested(const QString &image_url);
 
+  protected:
+    void wheelEvent(QWheelEvent *e);
+
   private:
     QPixmap m_imagePlaceholder;
 };