2 files changed, 32 insertions, 1 deletions
diff --git a/src/layout/floating.rs b/src/layout/floating.rs
index 3633ad18..08a74b37 100644
--- a/src/layout/floating.rs
+++ b/src/layout/floating.rs
@@ -1,3 +1,4 @@
+use std::cmp::max;
 use std::iter::zip;
 use std::rc::Rc;
 
@@ -1097,6 +1098,36 @@ impl<W: LayoutElement> FloatingSpace<W> {
         }
     }
 
+    pub fn resolve_width(&self, width: ColumnWidth) -> ResolvedSize {
+        width.resolve_no_gaps(&self.options, self.working_area.size.w)
+    }
+
+    pub fn new_window_size(
+        &self,
+        width: Option<ColumnWidth>,
+        rules: &ResolvedWindowRules,
+    ) -> Size<i32, Logical> {
+        let border = rules.border.resolve_against(self.options.border);
+
+        let width = if let Some(width) = width {
+            let width = match self.resolve_width(width) {
+                ResolvedSize::Tile(mut size) => {
+                    if !border.off {
+                        size -= border.width.0 * 2.;
+                    }
+                    size
+                }
+                ResolvedSize::Window(size) => size,
+            };
+
+            max(1, width.floor() as i32)
+        } else {
+            0
+        };
+
+        Size::from((width, 0))
+    }
+
     #[cfg(test)]
     pub fn view_size(&self) -> Size<f64, Logical> {
         self.view_size
diff --git a/src/layout/workspace.rs b/src/layout/workspace.rs
index a9ba091b..516e02fd 100644
--- a/src/layout/workspace.rs
+++ b/src/layout/workspace.rs
@@ -723,7 +723,7 @@ impl<W: LayoutElement> Workspace<W> {
         (min_size, max_size): (Size<i32, Logical>, Size<i32, Logical>),
     ) -> Size<i32, Logical> {
         let mut size = if is_floating {
-            Size::from((0, 0))
+            self.floating.new_window_size(width, rules)
         } else {
             self.scrolling.new_window_size(width, rules)
         };