From 03d1fe434c58ce0071a69d864481ae4ab8075a3e Mon Sep 17 00:00:00 2001
From: Anubhav Choudhary <ac.10edu@gmail.com>
Date: Sun, 6 Dec 2020 04:32:18 +0530
Subject: [PATCH] Navigation button hideability added

---
 src/calamares/calamares-navigation.qml |  4 ++--
 src/libcalamares/Settings.cpp          |  1 +
 src/libcalamares/Settings.h            |  3 +++
 src/libcalamaresui/ViewManager.cpp     |  7 +++++++
 src/libcalamaresui/ViewManager.h       | 10 ++++++++++
 5 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/src/calamares/calamares-navigation.qml b/src/calamares/calamares-navigation.qml
index 131926175..937e35529 100644
--- a/src/calamares/calamares-navigation.qml
+++ b/src/calamares/calamares-navigation.qml
@@ -35,7 +35,7 @@ Rectangle {
             icon.name: ViewManager.backIcon;
 
             enabled: ViewManager.backEnabled;
-            visible: true;
+            visible: ViewManager.backAndNextVisible;
             onClicked: { ViewManager.back(); }
         }
         Button
@@ -44,7 +44,7 @@ Rectangle {
             icon.name: ViewManager.nextIcon;
 
             enabled: ViewManager.nextEnabled;
-            visible: true;
+            visible: ViewManager.backAndNextVisible;
             onClicked: { ViewManager.next(); }
         }
         Button
diff --git a/src/libcalamares/Settings.cpp b/src/libcalamares/Settings.cpp
index dcb5c70b0..9453075b6 100644
--- a/src/libcalamares/Settings.cpp
+++ b/src/libcalamares/Settings.cpp
@@ -308,6 +308,7 @@ Settings::setConfiguration( const QByteArray& ba, const QString& explainName )
         m_isSetupMode = requireBool( config, "oem-setup", !m_doChroot );
         m_disableCancel = requireBool( config, "disable-cancel", false );
         m_disableCancelDuringExec = requireBool( config, "disable-cancel-during-exec", false );
+        m_hideBackAndNextDuringExec = requireBool( config, "hide-back-and-next-during-exec", false );
         m_quitAtEnd = requireBool( config, "quit-at-end", false );
 
         reconcileInstancesAndSequence();
diff --git a/src/libcalamares/Settings.h b/src/libcalamares/Settings.h
index 0abf3b866..b1a1c661c 100644
--- a/src/libcalamares/Settings.h
+++ b/src/libcalamares/Settings.h
@@ -157,6 +157,8 @@ public:
     /** @brief Temporary setting of disable-cancel: can't cancel during exec. */
     bool disableCancelDuringExec() const { return m_disableCancelDuringExec; }
 
+    bool hideBackAndNextDuringExec() const { return m_hideBackAndNextDuringExec; }
+
     /** @brief Is quit-at-end set? (Quit automatically when done) */
     bool quitAtEnd() const { return m_quitAtEnd; }
 
@@ -176,6 +178,7 @@ private:
     bool m_promptInstall;
     bool m_disableCancel;
     bool m_disableCancelDuringExec;
+    bool m_hideBackAndNextDuringExec;
     bool m_quitAtEnd;
 };
 
diff --git a/src/libcalamaresui/ViewManager.cpp b/src/libcalamaresui/ViewManager.cpp
index 8094e5223..0c5987bb8 100644
--- a/src/libcalamaresui/ViewManager.cpp
+++ b/src/libcalamaresui/ViewManager.cpp
@@ -369,6 +369,7 @@ ViewManager::next()
             UPDATE_BUTTON_PROPERTY( backEnabled, false )
         }
         updateCancelEnabled( !settings->disableCancel() && !( executing && settings->disableCancelDuringExec() ) );
+        updateBackAndNextVisibility(!executing || !settings->hideBackAndNextDuringExec());
     }
     else
     {
@@ -528,6 +529,12 @@ ViewManager::updateCancelEnabled( bool enabled )
     emit cancelEnabled( enabled );
 }
 
+void
+ViewManager::updateBackAndNextVisibility( bool visible)
+{
+    UPDATE_BUTTON_PROPERTY( backAndNextVisible, visible )
+}
+
 QVariant
 ViewManager::data( const QModelIndex& index, int role ) const
 {
diff --git a/src/libcalamaresui/ViewManager.h b/src/libcalamaresui/ViewManager.h
index 165358b76..4fbcda39d 100644
--- a/src/libcalamaresui/ViewManager.h
+++ b/src/libcalamaresui/ViewManager.h
@@ -45,6 +45,8 @@ class UIDLLEXPORT ViewManager : public QAbstractListModel
 
     Q_PROPERTY( bool quitVisible READ quitVisible NOTIFY quitVisibleChanged FINAL )
 
+    Q_PROPERTY( bool backAndNextVisible READ backAndNextVisible NOTIFY backAndNextVisibleChanged FINAL )
+
     ///@brief Sides on which the ViewManager has side-panels
     Q_PROPERTY( Qt::Orientations panelSides READ panelSides WRITE setPanelSides MEMBER m_panelSides )
 
@@ -144,6 +146,10 @@ public Q_SLOTS:
         return m_backIcon;  ///< Name of the icon to show
     }
 
+    bool backAndNextVisible() const
+    {
+        return m_backAndNextVisible;  ///< Is the quit-button to be enabled
+    }
     /**
      * @brief Probably quit
      *
@@ -203,6 +209,7 @@ signals:
     void backEnabledChanged( bool ) const;
     void backLabelChanged( QString ) const;
     void backIconChanged( QString ) const;
+    void backAndNextVisibleChanged( bool ) const;
 
     void quitEnabledChanged( bool ) const;
     void quitLabelChanged( QString ) const;
@@ -217,6 +224,7 @@ private:
     void insertViewStep( int before, ViewStep* step );
     void updateButtonLabels();
     void updateCancelEnabled( bool enabled );
+    void updateBackAndNextVisibility( bool visible );
 
     inline bool currentStepValid() const { return ( 0 <= m_currentStep ) && ( m_currentStep < m_steps.length() ); }
 
@@ -236,6 +244,8 @@ private:
     QString m_backLabel;
     QString m_backIcon;
 
+    bool m_backAndNextVisible = true;
+
     bool m_quitEnabled = false;
     QString m_quitLabel;
     QString m_quitIcon;