Show the screensaver branding on the login screen

default/sddm/blob/Main.qml

@@ -23,6 +23,11 @@ Rectangle {
   readonly property int smallFontSize: 14
   readonly property int sectionGap: 48
   readonly property int edgeMargin: 32
+  readonly property int brandingMaxWidth: 1100
+  readonly property int brandingMaxFontSize: 36
+  readonly property int brandingMinFontSize: 4
+
+  readonly property string brandingText: brandingLoader.item ? brandingLoader.item.text : ""
 
   property string username: userModel.lastUser
   property bool enteringUsername: username.length === 0
@@ -111,7 +116,31 @@ Rectangle {
     onClicked: fieldInput.forceActiveFocus()
   }
 
+  Loader {
+    id: brandingLoader
+    source: "Branding.qml"
+  }
+
+  Text {
+    anchors.horizontalCenter: parent.horizontalCenter
+    anchors.bottom: clockColumn.top
+    anchors.bottomMargin: root.sectionGap
+    width: Math.min(parent.width * 0.86, root.brandingMaxWidth)
+    height: Math.max(0, clockColumn.y - root.sectionGap * 2)
+    visible: root.brandingText.length > 0
+    text: root.brandingText
+    textFormat: Text.PlainText
+    color: root.textColor
+    font.family: root.fontFamily
+    font.pixelSize: root.brandingMaxFontSize
+    minimumPixelSize: root.brandingMinFontSize
+    fontSizeMode: Text.Fit
+    horizontalAlignment: Text.AlignHCenter
+    verticalAlignment: Text.AlignBottom
+  }
+
   Image {
+    visible: root.brandingText.length === 0
     anchors.horizontalCenter: parent.horizontalCenter
     anchors.bottom: clockColumn.top
     anchors.bottomMargin: root.sectionGap

install/steps/login.sh

@@ -18,6 +18,7 @@ greeter_theme_files=(Main.qml metadata.desktop theme.conf)
 # the greeter with no compositor and the screen black.
 install_login_config() {
   install_greeter_theme
+  install_greeter_branding
   install_root_file "$repo_dir/default/sddm/hyprland-greeter.lua" \
     "$greeter_compositor_config" "sddm/hyprland-greeter.lua"
   install_root_file "$repo_dir/default/sddm/zz-blob.conf" \
@@ -29,7 +30,7 @@ install_login_config() {
 }
 
 install_greeter_theme() {
-  local file
+  local file force=true
   for file in "${greeter_theme_files[@]}"; do
     install_root_file "$repo_dir/default/sddm/blob/$file" \
       "$greeter_theme_dir/$file" "sddm/themes/blob/$file"
@@ -38,6 +39,19 @@ install_greeter_theme() {
     "$greeter_theme_dir/logo.svg" "sddm/themes/blob/logo.svg"
 }
 
+install_greeter_branding() {
+  local source="$HOME/.config/blob/branding/screensaver.txt"
+  [[ -r $source ]] || source="$repo_dir/branding/screensaver.txt"
+  [[ -r $source ]] && command -v jq >/dev/null || return 0
+
+  local generated force=true
+  generated="$(mktemp)"
+  printf 'import QtQuick\n\nQtObject {\n  readonly property string text: %s\n}\n' \
+    "$(jq -Rs . <"$source")" >"$generated"
+  install_root_file "$generated" "$greeter_theme_dir/Branding.qml" "sddm/themes/blob/Branding.qml"
+  rm -f "$generated"
+}
+
 install_session_entry() {
   install_root_file "$repo_dir/session/blob.desktop" \
     "$session_entry_dir/blob.desktop" "wayland session entry"