Add reset font size shortcut

Summary:
Whenever I change the font size doing so is usually temporary and I usually go back to the default font size in after a short time. Currently I do so by changing to a different profile and discarding the change, which resets the font size to the default. I feel like there should be a shortcut for resetting the size.

I could not find an appropriate icon, so I left it without icon.
The default shortcut ctrl+r seemed reasonable and easy to type, 'r' reset.

Test Plan: Manual.

Reviewers: hindenburg, tcanabrava, #vdg, ngraham

Reviewed By: #vdg, ngraham

Subscribers: muhlenpfordt, ach, kvermette, rizzitello, lbergdoll, hindenburg, fabianr, dhaumann, kde-doc-english, z3ntu, ngraham, konsole-devel

Tags: #konsole, #documentation

Differential Revision: https://phabricator.kde.org/D15380

desktop/sessionui.rc

@@ -1,6 +1,6 @@
 <!DOCTYPE kpartgui>
 
-<kpartgui name="session" version="25">
+<kpartgui name="session" version="26">
     <MenuBar>
         <Menu name="file">
             <Action name="file_save_as" group="session-operations"/>
@@ -32,6 +32,7 @@
             <Action name="view-readonly" group="session-view-operations"/>
             <Separator group="session-view-operations"/>
             <Action name="enlarge-font" group="session-view-operations"/>
+            <Action name="reset-font-size" group="session-view-operations"/>
             <Action name="shrink-font" group="session-view-operations"/>
             <Action name="set-encoding" group="session-view-operations"/>
             <Separator group="session-view-operations"/>

doc/manual/index.docbook

@@ -768,6 +768,14 @@ drag and drop is disabled.
 <listitem><para><action>Increases the text font size</action></para></listitem>
 </varlistentry>
 
+<varlistentry>
+<term><menuchoice>
+<shortcut><keycombo action="simul">&Ctrl;<keycap>0</keycap></keycombo></shortcut>
+<guimenu>View</guimenu><guimenuitem>Reset Font Size</guimenuitem></menuchoice></term>
+<listitem><para><action>Reset the text font size to the profile default</action></para></listitem>
+</varlistentry>
+
+
 <varlistentry>
 <term><menuchoice>
 <shortcut><keycombo action="simul">&Ctrl;<keycap>-</keycap></keycombo></shortcut>

src/SessionController.cpp

@@ -718,6 +718,9 @@ void SessionController::setupExtraActions()
     action->setIcon(QIcon::fromTheme(QStringLiteral("format-font-size-less")));
     collection->setDefaultShortcut(action, Konsole::ACCEL + Qt::Key_Minus);
 
+    action = collection->addAction(QStringLiteral("reset-font-size"), this, SLOT(resetFontSize()));
+    action->setText(i18n("Reset Font Size"));
+    collection->setDefaultShortcut(action, Konsole::ACCEL + Qt::ALT + Qt::Key_0);
 
     // Send signal
     KSelectAction* sendSignalActions = collection->add<KSelectAction>(QStringLiteral("send-signal"));
@@ -1508,6 +1511,11 @@ void SessionController::decreaseFontSize()
     _view->decreaseFontSize();
 }
 
+void SessionController::resetFontSize()
+{
+    _view->resetFontSize();
+}
+
 void SessionController::monitorActivity(bool monitor)
 {
     _session->setMonitorActivity(monitor);
@@ -2115,4 +2123,3 @@ QString SessionController::userTitle() const
         return QString();
     }
 }
-

src/SessionController.h

@@ -219,6 +219,9 @@ public Q_SLOTS:
     /**  Decrease font size */
     void decreaseFontSize();
 
+    /** Reset font size */
+    void resetFontSize();
+
 private Q_SLOTS:
     // menu item handlers
     void openBrowser();

src/TerminalDisplay.cpp

@@ -336,6 +336,18 @@ void TerminalDisplay::decreaseFontSize()
     setVTFont(font);
 }
 
+void TerminalDisplay::resetFontSize()
+{
+    const qreal MinimumFontSize = 6;
+
+    QFont font = getVTFont();
+    Profile::Ptr currentProfile = SessionManager::instance()->sessionProfile(_sessionController->session());
+    const qreal defaultFontSize = currentProfile->font().pointSizeF();
+
+    font.setPointSizeF(qMax(defaultFontSize, MinimumFontSize));
+    setVTFont(font);
+}
+
 uint TerminalDisplay::lineSpacing() const
 {
     return _lineSpacing;

src/TerminalDisplay.h

@@ -427,6 +427,9 @@ public:
     /** Decreases the font size */
     void decreaseFontSize();
 
+    /** Reset the font size */
+    void resetFontSize();
+
     /**
      * Specified whether anti-aliasing of text in the terminal display
      * is enabled or not.  Defaults to enabled.