layout: Keep content purpose around

This allows to add proper CSS style classes based on that

src/data/loading.rs

@@ -61,7 +61,7 @@ pub mod c {
         };
 
         let (kind, layout) = load_layout_data_with_fallback(&name, type_, variant, overlay_str);
-        let layout = ::layout::Layout::new(layout, kind);
+        let layout = ::layout::Layout::new(layout, kind, variant);
         Box::into_raw(Box::new(layout))
     }
 }

src/imservice.rs

@@ -233,7 +233,7 @@ bitflags!{
 /// use rs::imservice::ContentPurpose;
 /// assert_eq!(ContentPurpose::Alpha as u32, 1);
 /// ```
-#[derive(Debug, Clone)]
+#[derive(Debug, Copy, Clone)]
 pub enum ContentPurpose {
     Normal = 0,
     Alpha = 1,

src/layout.h

@@ -33,6 +33,7 @@ struct transformation squeek_layout_calculate_transformation(
 
 struct squeek_layout *squeek_load_layout(const char *name, uint32_t type, uint32_t variant_type, const char *overlay_name);
 enum squeek_arrangement_kind squeek_layout_get_kind(const struct squeek_layout *);
+uint32_t squeek_layout_get_purpose(const struct squeek_layout *);
 void squeek_layout_free(struct squeek_layout*);
 
 void squeek_layout_release(struct squeek_layout *layout,

src/layout.rs

@@ -32,6 +32,8 @@ use ::manager;
 use ::submission::{ Submission, SubmitData, Timestamp };
 use ::util::find_max_double;
 
+use ::imservice::ContentPurpose;
+
 // Traits
 use std::borrow::Borrow;
 use ::logging::Warn;
@@ -183,6 +185,13 @@ pub mod c {
         layout.kind.clone() as u32
     }
 
+    #[no_mangle]
+    pub extern "C"
+    fn squeek_layout_get_purpose(layout: *const Layout) -> u32 {
+        let layout = unsafe { &*layout };
+        layout.purpose.clone() as u32
+    }
+
     #[no_mangle]
     pub extern "C"
     fn squeek_layout_free(layout: *mut Layout) {
@@ -627,6 +636,7 @@ pub enum LatchedState {
 pub struct Layout {
     pub margins: Margins,
     pub kind: ArrangementKind,
+    pub purpose: ContentPurpose,
     pub current_view: String,
 
     // If current view is latched,
@@ -676,7 +686,7 @@ impl fmt::Display for NoSuchView {
 // The usage of &mut on Rc<RefCell<KeyState>> doesn't mean anything special.
 // Cloning could also be used.
 impl Layout {
-    pub fn new(data: LayoutData, kind: ArrangementKind) -> Layout {
+    pub fn new(data: LayoutData, kind: ArrangementKind, purpose: ContentPurpose) -> Layout {
         Layout {
             kind,
             current_view: "base".to_owned(),
@@ -685,6 +695,7 @@ impl Layout {
             keymaps: data.keymaps,
             pressed_keys: HashSet::new(),
             margins: data.margins,
+            purpose,
         }
     }
 
@@ -1194,6 +1205,7 @@ mod test {
                 "base".into() => (c::Point { x: 0.0, y: 0.0 }, view.clone()),
                 "locked".into() => (c::Point { x: 0.0, y: 0.0 }, view),
             },
+            purpose: ContentPurpose::Normal,
         };
 
         // Basic cycle
@@ -1270,6 +1282,7 @@ mod test {
                 "locked".into() => (c::Point { x: 0.0, y: 0.0 }, view.clone()),
                 "unlocked".into() => (c::Point { x: 0.0, y: 0.0 }, view),
             },
+            purpose: ContentPurpose::Normal,
         };
 
         layout.apply_view_transition(&switch);
@@ -1336,6 +1349,7 @@ mod test {
                 "locked".into() => (c::Point { x: 0.0, y: 0.0 }, view.clone()),
                 "ĄĘ".into() => (c::Point { x: 0.0, y: 0.0 }, view),
             },
+            purpose: ContentPurpose::Normal,
         };
 
         // Latch twice, then Ąto-unlatch across 2 levels
@@ -1436,6 +1450,7 @@ mod test {
             views: hashmap! {
                 String::new() => (c::Point { x: 0.0, y: 0.0 }, view),
             },
+            purpose: ContentPurpose::Normal,
         };
         assert_eq!(
             layout.calculate_inner_size(),