feat: add notification application rules

config/dot/quickshell/modules/settings/NotificationsPage.qml

@@ -50,6 +50,70 @@ SettingsPage {
         SliderRow { setting: "maxVisibleToasts"; divider: false }
     }
 
+    SettingsCard {
+        title: "Application rules"
+        subtitle: "Apps appear here after they send a notification."
+
+        TextRow {
+            visible: Notifs.applications.length === 0
+            label: "No applications remembered yet"
+            detail: "Application controls will appear after the first notification arrives."
+            divider: false
+        }
+
+        Repeater {
+            model: Notifs.applications
+
+            Column {
+                required property var modelData
+
+                readonly property var app: modelData
+
+                width: parent.width
+
+                SettingRow {
+                    label: app.name
+                    detail: app.id
+                    controlWidth: 48
+
+                    SettingsToggle {
+                        anchors.right: parent.right
+                        anchors.verticalCenter: parent.verticalCenter
+                        checked: Notifs.appRule(app.id).enabled
+                        onToggled: value => Notifs.setAppRule(app.id, { enabled: value })
+                    }
+                }
+
+                SettingRow {
+                    label: "Show on lock screen"
+                    detail: "Allow this app's notifications on the lock screen"
+                    controlWidth: 48
+
+                    SettingsToggle {
+                        anchors.right: parent.right
+                        anchors.verticalCenter: parent.verticalCenter
+                        checked: Notifs.appRule(app.id).showOnLockScreen
+                        onToggled: value => Notifs.setAppRule(app.id, { showOnLockScreen: value })
+                    }
+                }
+
+                SettingRow {
+                    label: "Show content on lock screen"
+                    detail: "Show message details when this app is visible there"
+                    divider: false
+                    controlWidth: 48
+
+                    SettingsToggle {
+                        anchors.right: parent.right
+                        anchors.verticalCenter: parent.verticalCenter
+                        checked: Notifs.appRule(app.id).showContentOnLockScreen
+                        onToggled: value => Notifs.setAppRule(app.id, { showContentOnLockScreen: value })
+                    }
+                }
+            }
+        }
+    }
+
     SettingsCard {
         title: "Focus sessions"
         subtitle: "A focus session binds quiet mode and Caffeine to the current workspace."

config/dot/quickshell/services/Notifs.qml

@@ -37,6 +37,31 @@ Singleton {
     // Cleared when the notification centre is opened. The bar binds to this.
     property int unreadCount: 0
 
+    // Kept separate from the persisted map so this version can safely run
+    // before the matching schema entry lands. A later accepted write folds the
+    // complete map into DesktopPreferences and clears this fallback.
+    property var fallbackAppRules: ({})
+
+    // Display metadata is intentionally session-only. The durable shape stays
+    // just the per-application rule map, while a fresh notification gives the
+    // settings page a human-readable name straight away.
+    property var rememberedApplications: ({})
+
+    readonly property var persistedAppRules: {
+        const stored = DesktopPreferences.get("notificationAppRules");
+        return stored && typeof stored === "object" && !Array.isArray(stored) ? stored : {};
+    }
+
+    readonly property var appRules: Object.assign({}, root.persistedAppRules, root.fallbackAppRules)
+
+    readonly property var applications: {
+        const remembered = root.rememberedApplications;
+        return Object.keys(root.appRules).map(appId => ({
+            id: appId,
+            name: remembered[appId]?.name || appId
+        })).sort((a, b) => a.name.localeCompare(b.name));
+    }
+
     // Arrival times, keyed by notification id — the protocol carries no
     // timestamp. Deliberately formatted once at arrival rather than shown as
     // "5 minutes ago", which would need a clock ticking behind every card.
@@ -49,6 +74,70 @@ Singleton {
 
     readonly property bool hasNotifications: root.history.length > 0
 
+    function notificationAppId(notification: Notification): string {
+        const desktopEntry = String(notification.desktopEntry ?? "").trim();
+        return desktopEntry || String(notification.appName ?? "").trim() || "Notifications";
+    }
+
+    function normalizedAppRule(rule: var): var {
+        const source = rule && typeof rule === "object" && !Array.isArray(rule) ? rule : {};
+        return {
+            enabled: source.enabled !== false,
+            showOnLockScreen: source.showOnLockScreen !== false,
+            showContentOnLockScreen: source.showContentOnLockScreen !== false
+        };
+    }
+
+    function appRule(appId: string): var {
+        return root.normalizedAppRule(root.appRules[appId]);
+    }
+
+    function setAppRule(appId: string, patch: var): bool {
+        if (!appId)
+            return false;
+
+        const current = root.appRule(appId);
+        const next = {};
+        for (const knownAppId of Object.keys(root.appRules))
+            next[knownAppId] = root.appRule(knownAppId);
+        next[appId] = {
+            enabled: patch.enabled === undefined ? current.enabled : patch.enabled === true,
+            showOnLockScreen: patch.showOnLockScreen === undefined ? current.showOnLockScreen : patch.showOnLockScreen === true,
+            showContentOnLockScreen: patch.showContentOnLockScreen === undefined ? current.showContentOnLockScreen : patch.showContentOnLockScreen === true
+        };
+
+        if (DesktopPreferences.set("notificationAppRules", next))
+            root.fallbackAppRules = {};
+        else
+            root.fallbackAppRules = next;
+        return true;
+    }
+
+    function rememberApplication(notification: Notification): string {
+        const appId = root.notificationAppId(notification);
+        const next = Object.assign({}, root.rememberedApplications);
+        next[appId] = {
+            name: String(notification.appName ?? "").trim() || appId
+        };
+        root.rememberedApplications = next;
+
+        if (root.appRules[appId] === undefined)
+            root.setAppRule(appId, {});
+        return appId;
+    }
+
+    // These policy getters deliberately accept Notification objects, so a lock
+    // screen can use the same source of truth without duplicating app matching.
+    function shouldShowOnLockScreen(notification: Notification): bool {
+        const rule = root.appRule(root.notificationAppId(notification));
+        return rule.enabled && rule.showOnLockScreen;
+    }
+
+    function shouldShowContentOnLockScreen(notification: Notification): bool {
+        const rule = root.appRule(root.notificationAppId(notification));
+        return rule.enabled && rule.showOnLockScreen && rule.showContentOnLockScreen;
+    }
+
     // history grouped by app, in most-recent-app-first order — the shape
     // NotificationCenter.qml renders directly.
     readonly property var groups: {
@@ -92,6 +181,10 @@ Singleton {
             if (notification.lastGeneration)
                 return;
 
+            const appId = root.rememberApplication(notification);
+            if (!root.appRule(appId).enabled)
+                return;
+
             // Without this the object is destroyed the instant this returns.
             notification.tracked = true;
             root.arrivals[notification.id] = new Date();