Addded find capabalities, fixes #63.

resources/skins/vergilius/theme.css

@@ -33,6 +33,10 @@ QTreeView[hideTree="true"]::branch:!has-chlidren:hasSiblings {
   image: none;
 }
 
+QTextEdit {
+  selection-background-color: #3297FD;
+}
+
 QStatusBar::item {
   border: none;
 }

resources/text/CHANGELOG

@@ -2,6 +2,11 @@
 —————
 
 Added:
+▪ Internal message web viewer (and also lighter message text viewer) now support (#63) text searching. How to use:
+   1. Select some messages, it now gets displayed in internal viewer.
+   2. Give focus to internal viewer (click somehwere in it).
+   3. Press standard "find" keyboard shortcut (CTRL+F on Windows).
+   4. Search box appears on the bottom if internal message previewer.
 ▪ New context menu internal web viewer action to open links in ext. browser (#80)
 ▪ New bindable menu action Messages -> Enable message preview, which can disable opening message preview in internal web viewer. (#141)
 

src/gui/messagepreviewer.cpp

@@ -14,7 +14,22 @@
 #include <QToolTip>
 
 void MessagePreviewer::createConnections() {
-  connect(m_ui->m_txtMessage, &QTextBrowser::anchorClicked, [=](const QUrl& url) {
+  installEventFilter(this);
+
+  connect(m_ui.m_searchWidget, &SearchTextWidget::cancelSearch, this, [this]() {
+    m_ui.m_txtMessage->textCursor().clearSelection();
+    m_ui.m_txtMessage->moveCursor(QTextCursor::MoveOperation::Left);
+  });
+  connect(m_ui.m_searchWidget, &SearchTextWidget::searchForText, this, [this](const QString& text, bool backwards) {
+    if (backwards) {
+      m_ui.m_txtMessage->find(text, QTextDocument::FindFlag::FindBackward);
+    }
+    else {
+      m_ui.m_txtMessage->find(text);
+    }
+  });
+
+  connect(m_ui.m_txtMessage, &QTextBrowser::anchorClicked, [=](const QUrl& url) {
     if (url.toString().startsWith(INTERNAL_URL_PASSATTACHMENT) &&
         m_root != nullptr &&
         m_root->getParentServiceRoot()->downloadAttachmentOnMyOwn(url)) {
@@ -78,7 +93,7 @@ void MessagePreviewer::createConnections() {
           &QAction::triggered,
           this,
           &MessagePreviewer::switchMessageImportance);
-  connect(m_ui->m_txtMessage,
+  connect(m_ui.m_txtMessage,
           static_cast<void (QTextBrowser::*)(const QString&)>(&QTextBrowser::highlighted),
           [=](const QString& text) {
     Q_UNUSED(text)
@@ -86,31 +101,31 @@ void MessagePreviewer::createConnections() {
   });
 }
 
-MessagePreviewer::MessagePreviewer(QWidget* parent) : QWidget(parent),
-  m_ui(new Ui::MessagePreviewer), m_pictures(QStringList()) {
-  m_ui->setupUi(this);
-  m_ui->m_txtMessage->viewport()->setAutoFillBackground(true);
+MessagePreviewer::MessagePreviewer(QWidget* parent) : QWidget(parent), m_pictures(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);
+  m_ui.m_layout->addWidget(m_toolBar, 0, 0, -1, 1);
   createConnections();
+
   m_actionSwitchImportance->setCheckable(true);
+  m_ui.m_searchWidget->hide();
+
   reloadFontSettings();
   clear();
 }
 
-MessagePreviewer::~MessagePreviewer() {}
-
 void MessagePreviewer::reloadFontSettings() {
   const Settings* settings = qApp->settings();
   QFont fon;
 
   fon.fromString(settings->value(GROUP(Messages), SETTING(Messages::PreviewerFontStandard)).toString());
-  m_ui->m_txtMessage->setFont(fon);
+  m_ui.m_txtMessage->setFont(fon);
 }
 
 void MessagePreviewer::clear() {
-  m_ui->m_txtMessage->clear();
+  m_ui.m_txtMessage->clear();
   m_pictures.clear();
   hide();
 }
@@ -125,10 +140,10 @@ void MessagePreviewer::loadMessage(const Message& message, RootItem* root) {
 
   if (!m_root.isNull()) {
     m_actionSwitchImportance->setChecked(m_message.m_isImportant);
-    m_ui->m_txtMessage->setHtml(prepareHtmlForMessage(m_message));
+    m_ui.m_txtMessage->setHtml(prepareHtmlForMessage(m_message));
     updateButtons();
     show();
-    m_ui->m_txtMessage->verticalScrollBar()->triggerAction(QScrollBar::SliderToMinimum);
+    m_ui.m_txtMessage->verticalScrollBar()->triggerAction(QScrollBar::SliderToMinimum);
   }
 }
 
@@ -183,6 +198,23 @@ void MessagePreviewer::switchMessageImportance(bool checked) {
   }
 }
 
+bool MessagePreviewer::eventFilter(QObject* watched, QEvent* event) {
+  Q_UNUSED(watched)
+
+  if (event->type() == QEvent::KeyPress) {
+    QKeyEvent* key_event = static_cast<QKeyEvent*>(event);
+
+    if (key_event->matches(QKeySequence::StandardKey::Find)) {
+      m_ui.m_searchWidget->clear();
+      m_ui.m_searchWidget->show();
+      m_ui.m_searchWidget->setFocus();
+      return true;
+    }
+  }
+
+  return false;
+}
+
 void MessagePreviewer::updateButtons() {
   m_actionMarkRead->setEnabled(!m_message.m_isRead);
   m_actionMarkUnread->setEnabled(m_message.m_isRead);

src/gui/messagepreviewer.h

@@ -22,8 +22,7 @@ class MessagePreviewer : public QWidget {
   Q_OBJECT
 
   public:
-    explicit MessagePreviewer(QWidget* parent = 0);
-    virtual ~MessagePreviewer();
+    explicit MessagePreviewer(QWidget* parent = nullptr);
 
     void reloadFontSettings();
 
@@ -38,6 +37,9 @@ class MessagePreviewer : public QWidget {
     void markMessageAsReadUnread(RootItem::ReadStatus read);
     void switchMessageImportance(bool checked);
 
+  protected:
+    bool eventFilter(QObject* watched, QEvent* event);
+
   signals:
     void markMessageRead(int id, RootItem::ReadStatus read);
     void markMessageImportant(int id, RootItem::Importance important);
@@ -50,7 +52,7 @@ class MessagePreviewer : public QWidget {
 
     QToolBar* m_toolBar;
 
-    QScopedPointer<Ui::MessagePreviewer> m_ui;
+    Ui::MessagePreviewer m_ui;
     Message m_message;
     QStringList m_pictures;
 

src/gui/messagepreviewer.ui

@@ -42,6 +42,9 @@
      </property>
     </widget>
    </item>
+   <item row="1" column="1">
+    <widget class="SearchTextWidget" name="m_searchWidget" native="true"/>
+   </item>
   </layout>
  </widget>
  <customwidgets>
@@ -50,6 +53,12 @@
    <extends>QTextBrowser</extends>
    <header>messagetextbrowser.h</header>
   </customwidget>
+  <customwidget>
+   <class>SearchTextWidget</class>
+   <extends>QWidget</extends>
+   <header>searchtextwidget.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>

src/gui/webbrowser.cpp

@@ -136,6 +136,8 @@ void WebBrowser::loadMessage(const Message& message, RootItem* root) {
 }
 
 bool WebBrowser::eventFilter(QObject* watched, QEvent* event) {
+  Q_UNUSED(watched)
+
   if (event->type() == QEvent::KeyPress) {
     QKeyEvent* key_event = static_cast<QKeyEvent*>(event);