feat: support adaptive sync

Add a switch to toggle the mode. It is visible only when the Disman backend
supports adaptive sync.

Author: romangg

kcm/config_handler.cpp

@@ -111,6 +111,7 @@ void ConfigHandler::checkNeedsSave()
                     || output->position() != initialOutput->position()
                     || output->scale() != initialOutput->scale()
                     || output->rotation() != initialOutput->rotation()
+                    || output->adaptive_sync() != initialOutput->adaptive_sync()
                     || output->replication_source() != initialOutput->replication_source()
                     || output->retention() != initialOutput->retention()
                     || output->auto_resolution() != initialOutput->auto_resolution()

kcm/kcm.cpp

@@ -79,6 +79,7 @@ void KCMKDisplay::configReady(ConfigOperation* op)
     m_config->setConfig(config);
     setBackendReady(true);
     Q_EMIT perOutputScalingChanged();
+    Q_EMIT supports_adaptive_sync_changed();
     Q_EMIT primaryOutputSupportedChanged();
     Q_EMIT outputReplicationSupportedChanged();
     Q_EMIT tabletModeAvailableChanged();
@@ -127,6 +128,10 @@ void KCMKDisplay::doSave(bool force)
                               << (perOutputScaling() ? QString::number(output->scale())
                                                      : QStringLiteral("global"))
                               << "\n"
+                              << "    Adapt Sync:" << output->adaptive_sync()
+                              << (output->adaptive_sync_toggle_support() ? "(no toggle support)"
+                                                                         : ("supports toggle"))
+                              << "\n"
                               << "    Replicates:"
                               << (output->replication_source() == 0 ? "no" : "yes");
     }
@@ -218,6 +223,14 @@ bool KCMKDisplay::perOutputScaling() const
     return m_config->config()->supported_features().testFlag(Config::Feature::PerOutputScaling);
 }
 
+bool KCMKDisplay::supports_adaptive_sync() const
+{
+    if (!m_config || !m_config->config()) {
+        return false;
+    }
+    return m_config->config()->supported_features().testFlag(Config::Feature::AdaptiveSync);
+}
+
 bool KCMKDisplay::primaryOutputSupported() const
 {
     if (!m_config || !m_config->config()) {
@@ -294,6 +307,7 @@ void KCMKDisplay::load()
 
     m_config.reset(new ConfigHandler(this));
     Q_EMIT perOutputScalingChanged();
+    Q_EMIT supports_adaptive_sync_changed();
     connect(
         m_config.get(), &ConfigHandler::outputModelChanged, this, &KCMKDisplay::outputModelChanged);
     connect(m_config.get(), &ConfigHandler::outputConnect, this, [this](bool connected) {

kcm/kcm.h

@@ -36,6 +36,8 @@ class KCMKDisplay : public KQuickAddons::ConfigModule
     Q_PROPERTY(bool backendReady READ backendReady NOTIFY backendReadyChanged)
     Q_PROPERTY(bool screenNormalized READ screenNormalized NOTIFY screenNormalizedChanged)
     Q_PROPERTY(bool perOutputScaling READ perOutputScaling NOTIFY perOutputScalingChanged)
+    Q_PROPERTY(bool adaptiveSyncSupported READ supports_adaptive_sync NOTIFY
+                   supports_adaptive_sync_changed)
     Q_PROPERTY(bool primaryOutputSupported READ primaryOutputSupported NOTIFY
                    primaryOutputSupportedChanged)
     Q_PROPERTY(bool outputReplicationSupported READ outputReplicationSupported NOTIFY
@@ -70,6 +72,7 @@ class KCMKDisplay : public KQuickAddons::ConfigModule
 
     bool perOutputScaling() const;
     bool primaryOutputSupported() const;
+    bool supports_adaptive_sync() const;
     bool outputReplicationSupported() const;
 
     qreal globalScale() const;
@@ -92,6 +95,7 @@ class KCMKDisplay : public KQuickAddons::ConfigModule
     void changed();
     void screenNormalizedChanged();
     void perOutputScalingChanged();
+    void supports_adaptive_sync_changed();
     void primaryOutputSupportedChanged();
     void outputReplicationSupportedChanged();
     void globalScaleChanged();

kcm/output_model.cpp

@@ -83,7 +83,7 @@ QVariant OutputModel::data(const QModelIndex& index, int role) const
         return replicationSourceIndex(index.row());
     case ReplicasModelRole:
         return replicasModel(output);
-    case RefreshRatesRole:
+    case RefreshRatesRole: {
         QVariantList ret;
         for (auto rate : refreshRates(output)) {
             if (output->auto_refresh_rate()) {
@@ -99,6 +99,11 @@ QVariant OutputModel::data(const QModelIndex& index, int role) const
         }
         return ret;
     }
+    case AdaptiveSyncToggleSupportRole:
+        return output->adaptive_sync_toggle_support();
+    case AdaptiveSyncRole:
+        return output->adaptive_sync();
+    }
     return QVariant();
 }
 
@@ -181,7 +186,7 @@ bool OutputModel::setData(const QModelIndex& index, const QVariant& value, int r
             return setReplicationSourceIndex(index.row(), value.toInt() - 1);
         }
         break;
-    case ScaleRole:
+    case ScaleRole: {
         bool ok;
         const qreal scale = value.toReal(&ok);
         if (ok && !qFuzzyCompare(output.ptr->scale(), scale)) {
@@ -192,6 +197,12 @@ bool OutputModel::setData(const QModelIndex& index, const QVariant& value, int r
         }
         break;
     }
+    case AdaptiveSyncRole:
+        if (value.canConvert<bool>()) {
+            return set_adaptive_sync(index.row(), value.value<bool>());
+        }
+        break;
+    }
     return false;
 }
 
@@ -217,6 +228,8 @@ QHash<int, QByteArray> OutputModel::roleNames() const
     roles[ReplicationSourceModelRole] = "replicationSourceModel";
     roles[ReplicationSourceIndexRole] = "replicationSourceIndex";
     roles[ReplicasModelRole] = "replicasModel";
+    roles[AdaptiveSyncToggleSupportRole] = "adaptiveSyncToggleSupport";
+    roles[AdaptiveSyncRole] = "adaptiveSync";
     return roles;
 }
 
@@ -442,6 +455,20 @@ bool OutputModel::setRotation(int outputIndex, Disman::Output::Rotation rotation
     return true;
 }
 
+bool OutputModel::set_adaptive_sync(int outputIndex, bool value)
+{
+    Output& output = m_outputs[outputIndex];
+
+    if (output.ptr->adaptive_sync() == value) {
+        return false;
+    }
+    output.ptr->set_adaptive_sync(value);
+
+    auto index = createIndex(outputIndex, 0);
+    Q_EMIT dataChanged(index, index, {AdaptiveSyncRole});
+    return true;
+}
+
 int OutputModel::resolutionIndex(const Disman::OutputPtr& output) const
 {
     const QSize currentResolution = output->auto_mode()->size();

kcm/output_model.h

@@ -49,7 +49,9 @@ class OutputModel : public QAbstractListModel
         RefreshRatesRole,
         ReplicationSourceModelRole,
         ReplicationSourceIndexRole,
-        ReplicasModelRole
+        ReplicasModelRole,
+        AdaptiveSyncToggleSupportRole,
+        AdaptiveSyncRole,
     };
 
     explicit OutputModel(ConfigHandler* configHandler);
@@ -129,6 +131,7 @@ class OutputModel : public QAbstractListModel
     bool setResolution(int outputIndex, int resIndex);
     bool setRefreshRate(int outputIndex, int refIndex);
     bool setRotation(int outputIndex, Disman::Output::Rotation rotation);
+    bool set_adaptive_sync(int outputIndex, bool value);
 
     bool setAutoResolution(int outputIndex, bool value);
     bool setAutoRefreshRate(int outputIndex, bool value);

kcm/package/contents/ui/OutputPanel.qml

@@ -150,6 +150,14 @@ Kirigami.FormLayout {
             currentIndex: element.refreshRateIndex
             onActivated: element.refreshRateIndex = currentIndex
         }
+
+        Controls.Switch {
+            text: i18n("Adaptive Sync")
+            visible: kcm.adaptiveSyncSupported
+            enabled: element.adaptiveSyncToggleSupport
+            checked: element.adaptiveSync
+            onToggled: element.adaptiveSync = checked
+        }
     }
 
     Controls.ComboBox {

kcm/po/kcm_kdisplay.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-05-01 13:44-0500\n"
+"POT-Creation-Date: 2023-03-31 00:13+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -44,19 +44,19 @@ msgctxt "Refresh rate in Hz (rounded to 3 digits)"
 msgid "%1 Hz"
 msgstr ""
 
-#: kcm/output_model.cpp:501
+#: kcm/output_model.cpp:528
 #, kde-format
 msgctxt "Width x height (aspect ratio)"
 msgid "%1x%2 (%3:%4)"
 msgstr ""
 
-#: kcm/output_model.cpp:563
+#: kcm/output_model.cpp:590
 #, kde-format
 msgctxt "Displayed when no replication source is selected."
 msgid "None"
 msgstr ""
 
-#: kcm/output_model.cpp:570
+#: kcm/output_model.cpp:597
 #, kde-format
 msgid "Replicated by other display"
 msgstr ""
@@ -116,7 +116,12 @@ msgstr ""
 msgid "Refresh rate:"
 msgstr ""
 
-#: kcm/package/contents/ui/OutputPanel.qml:156
+#: kcm/package/contents/ui/OutputPanel.qml:155
+#, kde-format
+msgid "Adaptive Sync"
+msgstr ""
+
+#: kcm/package/contents/ui/OutputPanel.qml:164
 #, kde-format
 msgid "Replica of:"
 msgstr ""