save zoom factor per zim

Each time the zoom of a zim is changed, it is saved in the QSettings.

The SettingsManager class has new methods that wrap QSettings method :
- void setSettings(const QString &key, const QVariant &value);
- void deleteSettings(const QString &key);
- bool settingsExists(const QString &key);
- QVariant getSettings(const QString &key);

ChangeLog

@@ -6,6 +6,7 @@ kiwix-desktop rc4
  * Fix Reading list with bookmarks from missing books
  * Support video fullscreen mode
  * Support the default zoom level setting
+ * Support zoom level per zim
 
 kiwix-desktop rc3
 =================

src/contentmanager.cpp

@@ -241,6 +241,7 @@ void ContentManager::eraseBook(const QString& id)
     } else {
         emit(oneBookChanged(id));
     }
+    KiwixApp::instance()->getSettingsManager()->deleteSettings(id);
 }
 
 void ContentManager::pauseBook(const QString& id)

src/settingsmanager.cpp

@@ -5,7 +5,7 @@ SettingsManager::SettingsManager(QObject *parent)
     m_settings("Kiwix", "Kiwix-desktop"),
     m_settingsViewDisplayed(false)
 {
-    setSettings();
+    initSettings();
 }
 
 SettingsManagerView* SettingsManager::getView()
@@ -18,6 +18,36 @@ SettingsManagerView* SettingsManager::getView()
     return view;
 }
 
+void SettingsManager::setSettings(const QString &key, const QVariant &value)
+{
+    m_settings.setValue(key, value);
+}
+
+void SettingsManager::deleteSettings(const QString &key)
+{
+    m_settings.remove(key);
+}
+
+bool SettingsManager::settingsExists(const QString &key)
+{
+    return m_settings.contains(key);
+}
+
+QVariant SettingsManager::getSettings(const QString &key)
+{
+    return m_settings.value(key);
+}
+
+qreal SettingsManager::getZoomFactorByZimId(const QString &id)
+{
+    auto zoomFactor = m_zoomFactor;
+    QString key = id + "/zoomFactor";
+    if (settingsExists(key)) {
+        zoomFactor = getSettings(key).toDouble();
+    }
+    return zoomFactor;
+}
+
 void SettingsManager::setKiwixServerPort(int port)
 {
     m_kiwixServerPort = port;
@@ -31,7 +61,7 @@ void SettingsManager::setZoomFactor(qreal zoomFactor)
     m_settings.setValue("view/zoomFactor", zoomFactor);
 }
 
-void SettingsManager::setSettings()
+void SettingsManager::initSettings()
 {
     m_kiwixServerPort = m_settings.value("localKiwixServer/port", 8181).toInt();
     m_zoomFactor = m_settings.value("view/zoomFactor", 1).toDouble();

src/settingsmanager.h

@@ -17,6 +17,11 @@ public:
 
     SettingsManagerView* getView();
     bool isSettingsViewdisplayed() { return m_settingsViewDisplayed; };
+    void setSettings(const QString &key, const QVariant &value);
+    void deleteSettings(const QString &key);
+    bool settingsExists(const QString &key);
+    QVariant getSettings(const QString &key);
+    qreal getZoomFactorByZimId(const QString &id);
 
 public slots:
     void setKiwixServerPort(int port);
@@ -25,7 +30,7 @@ public slots:
     qreal getZoomFactor() { return m_zoomFactor; };
 
 private:
-    void setSettings();
+    void initSettings();
 
 signals:
     void portChanged(int port);

src/tabbar.cpp

@@ -46,6 +46,8 @@ TabBar::TabBar(QWidget *parent) :
                 zoomFactor += 0.1;
                 zoomFactor = max(min(zoomFactor, 5.0), 0.25);
                 current->setZoomFactor(zoomFactor);
+                auto key = this->currentZimId() + "/zoomFactor";
+                KiwixApp::instance()->getSettingsManager()->setSettings(key, zoomFactor);
             });
     connect(app->getAction(KiwixApp::ZoomOutAction), &QAction::triggered,
             this, [=]() {
@@ -55,12 +57,17 @@ TabBar::TabBar(QWidget *parent) :
                 zoomFactor -= 0.1;
                 zoomFactor = max(min(zoomFactor, 5.0), 0.25);
                 current->setZoomFactor(zoomFactor);
+                auto key = this->currentZimId() + "/zoomFactor";
+                KiwixApp::instance()->getSettingsManager()->setSettings(key, zoomFactor);
             });
     connect(app->getAction(KiwixApp::ZoomResetAction), &QAction::triggered,
             this, [=]() {
                 auto current = this->currentWidget();
                 QUITIFNULL(current);
-                current->setZoomFactor(1.0);
+                auto settingsManager = KiwixApp::instance()->getSettingsManager();
+                current->setZoomFactor(settingsManager->getZoomFactor());
+                auto key = this->currentZimId() + "/zoomFactor";
+                settingsManager->deleteSettings(key);
             });
     connect(app->getAction(KiwixApp::OpenHomePageAction), &QAction::triggered,
             this, [=]() {
@@ -170,8 +177,6 @@ void TabBar::openUrl(const QUrl& url, bool newTab)
     }
     QUITIFNULL(webView);
     webView->setUrl(url);
-    auto zoomFactor = KiwixApp::instance()->getSettingsManager()->getZoomFactor();
-    webView->setZoomFactor(zoomFactor);
 }
 
 void TabBar::setTitleOf(const QString& title, WebView* webView)

src/webview.cpp

@@ -54,6 +54,8 @@ void WebView::onUrlChanged(const QUrl& url) {
         pixmap.loadFromData((const uchar*)favicon.data(), favicon.size());
         m_icon = QIcon(pixmap);
         emit iconChanged(m_icon);
+        auto zoomFactor = app->getSettingsManager()->getZoomFactorByZimId(zimId);
+        this->setZoomFactor(zoomFactor);
     }
 }