Prepare axis setting for flex layouter ♟

src/layout/flex.rs

@@ -48,6 +48,7 @@ enum FlexUnit {
     Space(Size),
     /// A forced break of the current flex run.
     Break,
+    SetAxes(LayoutAxes),
 }
 
 #[derive(Debug, Clone)]
@@ -97,6 +98,11 @@ impl FlexLayouter {
         self.units.push(FlexUnit::Break);
     }
 
+    /// Update the axes in use by this flex layouter.
+    pub fn set_axes(&self, axes: LayoutAxes) {
+        self.units.push(FlexUnit::SetAxes(axes));
+    }
+
     /// Compute the justified layout.
     ///
     /// The layouter is not consumed by this to prevent ownership problems
@@ -117,6 +123,8 @@ impl FlexLayouter {
                     self.space = None;
                     self.finish_run()?;
                 },
+
+                FlexUnit::SetAxes(axes) => self.layout_set_axes(axes),
             }
         }
 
@@ -162,6 +170,10 @@ impl FlexLayouter {
         Ok(())
     }
 
+    fn layout_set_axes(&mut self, axes: LayoutAxes) {
+        // TODO
+    }
+
     /// Finish the current flex run.
     fn finish_run(&mut self) -> LayoutResult<()> {
         let mut actions = LayoutActionList::new();
@@ -183,11 +195,6 @@ impl FlexLayouter {
         Ok(())
     }
 
-    /// Update the axes in use by this flex layouter.
-    pub fn set_axes(&self, axes: LayoutAxes) {
-
-    }
-
     /// This layouter's context.
     pub fn ctx(&self) -> FlexContext {
         self.ctx

src/layout/tree.rs

@@ -100,8 +100,10 @@ impl<'a, 'p> TreeLayouter<'a, 'p> {
 
             Command::SetStyle(style) => *self.style.to_mut() = style,
             Command::SetAxes(axes) => {
-                self.stack.set_axes(axes);
                 self.flex.set_axes(axes);
+                if axes.secondary != self.ctx.axes.secondary {
+                    self.stack.set_axes(axes);
+                }
                 self.ctx.axes = axes;
             }
         }