Apply resize edge restrictions from configure to our decorations

src/deco.rs

@@ -17,12 +17,17 @@ use wl_proxy::{
     },
 };
 
-use crate::{buffer::SimpleBufferPool, globals::Globals, util::Bounds};
+use crate::{
+    buffer::SimpleBufferPool,
+    globals::Globals,
+    util::{Bounds, Edges},
+};
 
 #[derive(Default, Debug, Clone, PartialEq)]
 struct DecoParams {
     has_geometry: bool,
     bounds: Bounds,
+    restricted_edges: Edges<bool>,
 }
 
 pub struct Deco {
@@ -40,26 +45,26 @@ pub struct Deco {
 
 impl Deco {
     fn resize_anchor(&self, x: i32, y: i32) -> XdgToplevelResizeEdge {
-        let bounds = &self.last_params.borrow().bounds;
+        let params = self.last_params.borrow();
         let n = y < self.border_size;
-        let e = x >= bounds.width + self.border_size;
+        let e = x >= params.bounds.width + self.border_size;
         let w = x < self.border_size;
-        let s = y >= bounds.height + self.border_size;
-        if n && e {
+        let s = y >= params.bounds.height + self.border_size;
+        if n && e && !params.restricted_edges.top && !params.restricted_edges.right {
             XdgToplevelResizeEdge::TOP_RIGHT
-        } else if n && w {
+        } else if n && w && !params.restricted_edges.top && !params.restricted_edges.left {
             XdgToplevelResizeEdge::TOP_LEFT
-        } else if s && e {
+        } else if s && e && !params.restricted_edges.bottom && !params.restricted_edges.right {
             XdgToplevelResizeEdge::BOTTOM_RIGHT
-        } else if s && w {
+        } else if s && w && !params.restricted_edges.bottom && !params.restricted_edges.left {
             XdgToplevelResizeEdge::BOTTOM_LEFT
-        } else if n {
+        } else if n && !params.restricted_edges.top {
             XdgToplevelResizeEdge::TOP
-        } else if e {
+        } else if e && !params.restricted_edges.right {
             XdgToplevelResizeEdge::RIGHT
-        } else if w {
+        } else if w && !params.restricted_edges.left {
             XdgToplevelResizeEdge::LEFT
-        } else if s {
+        } else if s && !params.restricted_edges.bottom {
             XdgToplevelResizeEdge::BOTTOM
         } else {
             XdgToplevelResizeEdge::NONE
@@ -198,6 +203,11 @@ impl Deco {
         (x - self.border_size, y - self.top_size, width, height)
     }
 
+    pub fn set_restricted_edges(&self, edges: Edges<bool>) {
+        let mut params = self.next_params.borrow_mut();
+        params.restricted_edges = edges;
+    }
+
     pub fn handle_commit(&self) -> eyre::Result<()> {
         self.draw()
     }

src/util.rs

@@ -5,3 +5,11 @@ pub struct Bounds {
     pub width: i32,
     pub height: i32,
 }
+
+#[derive(Default, Debug, Clone, PartialEq)]
+pub struct Edges<T> {
+    pub top: T,
+    pub right: T,
+    pub bottom: T,
+    pub left: T,
+}

src/xdg.rs

@@ -18,7 +18,12 @@ use wl_proxy::{
     },
 };
 
-use crate::{client_buffer, deco::Deco, globals::Globals, util::Bounds};
+use crate::{
+    client_buffer,
+    deco::Deco,
+    globals::Globals,
+    util::{Bounds, Edges},
+};
 
 pub struct ClientWlSurface {
     pub xdg_surface: Rc<XdgSurface>,
@@ -222,6 +227,7 @@ impl XdgToplevelHandler for ClientXdgToplevel {
     fn handle_configure(&mut self, slf: &Rc<XdgToplevel>, width: i32, height: i32, states: &[u8]) {
         log::debug!("configure {slf:?}: {width}x{height}, {states:?}");
         let (_prefix, states, _suffix) = unsafe { states.align_to::<u32>() };
+        let mut restricted_edges = Edges::default();
         let mut top_state = ToplevelState::Normal;
         let mut resizing = false;
         let mut activated = false;
@@ -237,6 +243,31 @@ impl XdgToplevelHandler for ClientXdgToplevel {
                 top_state = ToplevelState::Maximixed;
             } else if *state == XdgToplevelState::FULLSCREEN.0 {
                 top_state = ToplevelState::Fullscreen;
+            } else if *state == XdgToplevelState::TILED_TOP.0
+                || *state == XdgToplevelState::CONSTRAINED_TOP.0
+            {
+                restricted_edges.top = true;
+            } else if *state == XdgToplevelState::TILED_RIGHT.0
+                || *state == XdgToplevelState::CONSTRAINED_RIGHT.0
+            {
+                restricted_edges.right = true;
+            } else if *state == XdgToplevelState::TILED_BOTTOM.0
+                || *state == XdgToplevelState::CONSTRAINED_BOTTOM.0
+            {
+                restricted_edges.bottom = true;
+            } else if *state == XdgToplevelState::TILED_LEFT.0
+                || *state == XdgToplevelState::CONSTRAINED_LEFT.0
+            {
+                restricted_edges.left = true;
+            }
+
+            if *state == XdgToplevelState::MAXIMIZED.0 || *state == XdgToplevelState::FULLSCREEN.0 {
+                restricted_edges = Edges {
+                    top: true,
+                    right: true,
+                    bottom: true,
+                    left: true,
+                }
             }
         }
 
@@ -262,6 +293,7 @@ impl XdgToplevelHandler for ClientXdgToplevel {
             ToplevelState::Fullscreen => outer_state.push(XdgToplevelState::FULLSCREEN),
         };
 
+        self.deco.set_restricted_edges(restricted_edges);
         let (width, height) = self.deco.transform_configure(width, height);
         let (_prefix, states, _suffix) = unsafe { outer_state.align_to::<u8>() };
         slf.send_configure(width, height, &states[..]);