From 82d32f96551479cac850884e47a12e3698c48129 Mon Sep 17 00:00:00 2001
From: Kevin Reid <kpreid@switchb.org>
Date: Tue, 21 Nov 2023 19:35:03 -0800
Subject: [PATCH] Remove `SpaceTransaction::set()`.

The majority of its uses were replaced with `SpaceTransaction::filling()`.
---
 all-is-cubes-ui/src/vui/widgets/toolbar.rs | 14 +++---
 all-is-cubes/src/space/space_txn.rs        | 54 +---------------------
 2 files changed, 9 insertions(+), 59 deletions(-)

diff --git a/all-is-cubes-ui/src/vui/widgets/toolbar.rs b/all-is-cubes-ui/src/vui/widgets/toolbar.rs
index 58dd72d7d..fe9a8e10b 100644
--- a/all-is-cubes-ui/src/vui/widgets/toolbar.rs
+++ b/all-is-cubes-ui/src/vui/widgets/toolbar.rs
@@ -14,7 +14,7 @@ use all_is_cubes::drawing::embedded_graphics::{
 use all_is_cubes::inv::{Slot, TOOL_SELECTIONS};
 use all_is_cubes::listen::{DirtyFlag, Gate, Listen as _, ListenableSource, Listener};
 use all_is_cubes::math::{Cube, FaceMap, GridAab, GridCoordinate, GridPoint, GridVector, Gridgid};
-use all_is_cubes::space::{Space, SpacePhysics, SpaceTransaction};
+use all_is_cubes::space::{CubeTransaction, Space, SpacePhysics, SpaceTransaction};
 use all_is_cubes::time::Duration;
 use all_is_cubes::transaction::Merge as _;
 use all_is_cubes::universe::{URef, Universe};
@@ -196,12 +196,14 @@ impl ToolbarController {
                 break;
             }
 
-            let position = self.slot_position(index);
+            let cube = self.slot_position(index);
             // Draw icon
-            txn.set(
-                position,
-                None,
-                Some(stack.icon(&self.definition.hud_blocks.icons).into_owned()),
+            txn.merge_from(
+                CubeTransaction::replacing(
+                    None,
+                    Some(stack.icon(&self.definition.hud_blocks.icons).into_owned()),
+                )
+                .at(cube),
             )?;
         }
 
diff --git a/all-is-cubes/src/space/space_txn.rs b/all-is-cubes/src/space/space_txn.rs
index 6b2736a6c..af03e9735 100644
--- a/all-is-cubes/src/space/space_txn.rs
+++ b/all-is-cubes/src/space/space_txn.rs
@@ -66,29 +66,11 @@ impl SpaceTransaction {
     /// transaction will fail.
     /// If `new` is not [`None`], replaces the existing block with `new`.
     ///
-    /// TODO: This name is a poor name now that [`Self::set`] exists.
+    /// TODO: Consider replacing all uses of this with `CubeTransaction::replacing()`.
     pub fn set_cube(cube: impl Into<Cube>, old: Option<Block>, new: Option<Block>) -> Self {
         CubeTransaction::replacing(old, new).at(cube.into())
     }
 
-    /// Expand this transaction to include modifying the given cube, or return an error if
-    /// that would conflict (by the same definition as transaction merging).
-    ///
-    /// If `old` is not [`None`], requires that the existing block is that block or the
-    /// transaction will fail.
-    /// If `new` is not [`None`], replaces the existing block with `new`.
-    pub fn set(
-        &mut self,
-        cube: impl Into<Cube>,
-        old: Option<Block>,
-        new: Option<Block>,
-    ) -> Result<(), SpaceTransactionConflict> {
-        let cube: Cube = cube.into();
-        self.at(cube)
-            .merge_from(CubeTransaction::replacing(old, new))
-            .map_err(|conflict| SpaceTransactionConflict::Cube { cube, conflict })
-    }
-
     /// Provides an [`DrawTarget`](embedded_graphics::prelude::DrawTarget)
     /// adapter for 2.5D drawing.
     ///
@@ -653,40 +635,6 @@ mod tests {
             .unwrap_err();
     }
 
-    #[test]
-    fn set_cube_mutate_equivalent_to_merge() {
-        let [b1, b2, b3] = make_some_blocks();
-
-        // A basic single-cube transaction is the same either way.
-        let mut t = SpaceTransaction::default();
-        t.set([0, 0, 0], Some(b1.clone()), Some(b2.clone()))
-            .unwrap();
-        assert_eq!(
-            t,
-            SpaceTransaction::set_cube([0, 0, 0], Some(b1.clone()), Some(b2.clone())),
-        );
-
-        // Two-cube transaction.
-        let prev = t.clone();
-        t.set([1, 0, 0], Some(b2.clone()), Some(b3.clone()))
-            .unwrap();
-        assert_eq!(
-            t,
-            prev.merge(SpaceTransaction::set_cube(
-                [1, 0, 0],
-                Some(b2.clone()),
-                Some(b3.clone())
-            ))
-            .unwrap(),
-        );
-
-        // Conflict
-        let prev = t.clone();
-        t.set([0, 0, 0], Some(b1.clone()), Some(b3.clone()))
-            .expect_err("should have merge failure");
-        assert_eq!(t, prev,);
-    }
-
     #[test]
     fn merge_allows_independent() {
         let [b1, b2, b3] = make_some_blocks();