apprt/gtk: stylistic changes

src/apprt/gtk/Split.zig

@@ -15,7 +15,25 @@ const c = @import("c.zig");
 
 const log = std.log.scoped(.gtk);
 
-pub const Orientation = enum { horizontal, vertical };
+/// The split orientation.
+pub const Orientation = enum {
+    horizontal,
+    vertical,
+
+    pub fn fromDirection(direction: input.SplitDirection) Orientation {
+        return switch (direction) {
+            .right => .horizontal,
+            .down => .vertical,
+        };
+    }
+
+    pub fn fromResizeDirection(direction: input.SplitResizeDirection) Orientation {
+        return switch (direction) {
+            .up, .down => .vertical,
+            .left, .right => .horizontal,
+        };
+    }
+};
 
 /// Our actual GtkPaned widget
 paned: *c.GtkPaned,
@@ -83,10 +101,7 @@ pub fn init(
         .container = container,
         .top_left = .{ .surface = sibling },
         .bottom_right = .{ .surface = surface },
-        .orientation = (switch (direction) {
+        .orientation = Orientation.fromDirection(direction),
-            .right => .horizontal,
-            .down => .vertical,
-        }),
     };
 
     // Replace the previous containers element with our split.
@@ -146,12 +161,14 @@ fn removeChild(
     alloc.destroy(self);
 }
 
+/// Move the divider in the given direction by the given amount.
 pub fn moveDivider(self: *Split, direction: input.SplitResizeDirection, amount: u16) void {
     const pos = c.gtk_paned_get_position(self.paned);
     const new = switch (direction) {
         .up, .left => pos - amount,
         .down, .right => pos + amount,
     };
+
     c.gtk_paned_set_position(self.paned, new);
 }
 

src/apprt/gtk/Surface.zig

@@ -153,7 +153,10 @@ pub const Container = union(enum) {
 
     /// Returns the first split with the given orientation, walking upwards in
     /// the tree.
-    pub fn firstSplitWithOrientation(self: Container, orientation: Split.Orientation) ?*Split {
+    pub fn firstSplitWithOrientation(
+        self: Container,
+        orientation: Split.Orientation,
+    ) ?*Split {
         return switch (self) {
             .none, .tab_ => null,
             .split_tl, .split_br => split: {
@@ -573,10 +576,9 @@ pub fn gotoSplit(self: *const Surface, direction: input.SplitFocusDirection) voi
 }
 
 pub fn resizeSplit(self: *const Surface, direction: input.SplitResizeDirection, amount: u16) void {
-    const s = self.container.firstSplitWithOrientation(switch (direction) {
+    const s = self.container.firstSplitWithOrientation(
-        .up, .down => .vertical,
+        Split.Orientation.fromResizeDirection(direction),
-        .left, .right => .horizontal,
+    ) orelse return;
-    }) orelse return;
     s.moveDivider(direction, amount);
 }