config: Add zoom configuration

cosmic-comp-config/src/lib.rs

@@ -48,6 +48,7 @@ pub struct CosmicCompConfig {
     pub descale_xwayland: bool,
     /// The threshold before windows snap themselves to output edges
     pub edge_snap_threshold: u32,
+    pub accessibility_zoom: ZoomConfig,
 }
 
 impl Default for CosmicCompConfig {
@@ -79,6 +80,7 @@ impl Default for CosmicCompConfig {
             focus_follows_cursor_delay: 250,
             descale_xwayland: false,
             edge_snap_threshold: 0,
+            accessibility_zoom: ZoomConfig::default(),
         }
     }
 }
@@ -124,3 +126,27 @@ fn default_repeat_rate() -> u32 {
 fn default_repeat_delay() -> u32 {
     600
 }
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
+pub struct ZoomConfig {
+    pub start_on_login: bool,
+    pub increment: u32,
+    pub view_moves: ZoomMovement,
+}
+
+impl Default for ZoomConfig {
+    fn default() -> Self {
+        ZoomConfig {
+            start_on_login: false,
+            increment: 100,
+            view_moves: ZoomMovement::OnEdge,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
+pub enum ZoomMovement {
+    OnEdge,
+    Centered,
+    Continuously,
+}

src/config/mod.rs

@@ -45,7 +45,7 @@ pub use self::types::*;
 use cosmic::config::CosmicTk;
 use cosmic_comp_config::{
     input::InputConfig, workspace::WorkspaceConfig, CosmicCompConfig, KeyboardConfig, TileBehavior,
-    XkbConfig,
+    XkbConfig, ZoomConfig,
 };
 
 #[derive(Debug)]
@@ -852,6 +852,12 @@ fn config_changed(config: cosmic_config::Config, keys: Vec<String>, state: &mut
                     state.common.config.cosmic_conf.edge_snap_threshold = new;
                 }
             }
+            "accessibility_zoom" => {
+                let new = get_config::<ZoomConfig>(&config, "accessibility_zoom");
+                if new != state.common.config.cosmic_conf.accessibility_zoom {
+                    state.common.config.cosmic_conf.accessibility_zoom = new;
+                }
+            }
             _ => {}
         }
     }