feat: support horizontal mouse scrolling

closes #382

src/renderer/vaxis/input.zig

@@ -18,8 +18,8 @@ pub const mouse = struct {
     pub const BUTTON3: Mouse = vaxis.Mouse.Button.right;
     pub const BUTTON4: Mouse = vaxis.Mouse.Button.wheel_up;
     pub const BUTTON5: Mouse = vaxis.Mouse.Button.wheel_down;
-    // pub const BUTTON6: Mouse = vaxis.Mouse.Button.button_6;
+    pub const BUTTON6: Mouse = vaxis.Mouse.Button.wheel_right;
-    // pub const BUTTON7: Mouse = vaxis.Mouse.Button.button_7;
+    pub const BUTTON7: Mouse = vaxis.Mouse.Button.wheel_left;
     pub const BUTTON8: Mouse = vaxis.Mouse.Button.button_8;
     pub const BUTTON9: Mouse = vaxis.Mouse.Button.button_9;
     pub const BUTTON10: Mouse = vaxis.Mouse.Button.button_10;
@@ -323,13 +323,12 @@ pub const utils = struct {
             mouse.BUTTON3 => "button3",
             mouse.BUTTON4 => "button4",
             mouse.BUTTON5 => "button5",
-            // mouse.BUTTON6 => "button6",
+            mouse.BUTTON6 => "button6",
-            // mouse.BUTTON7 => "button7",
+            mouse.BUTTON7 => "button7",
             mouse.BUTTON8 => "button8",
             mouse.BUTTON9 => "button9",
             mouse.BUTTON10 => "button10",
             mouse.BUTTON11 => "button11",
-            else => "",
         };
     }
 };

src/tui/editor.zig

@@ -6488,6 +6488,8 @@ pub const EditorWidget = struct {
             input.mouse.BUTTON3 => &mouse_click_button3,
             input.mouse.BUTTON4 => &mouse_click_button4,
             input.mouse.BUTTON5 => &mouse_click_button5,
+            input.mouse.BUTTON6 => &mouse_click_button6,
+            input.mouse.BUTTON7 => &mouse_click_button7,
             input.mouse.BUTTON8 => &mouse_click_button8, //back
             input.mouse.BUTTON9 => &mouse_click_button9, //forward
             else => return,
@@ -6568,6 +6570,14 @@ pub const EditorWidget = struct {
         try self.editor.scroll_down_pagedown(.{});
     }
 
+    fn mouse_click_button6(self: *Self, _: c_int, _: c_int, _: c_int, _: c_int) Result {
+        try self.editor.move_scroll_left(.{});
+    }
+
+    fn mouse_click_button7(self: *Self, _: c_int, _: c_int, _: c_int, _: c_int) Result {
+        try self.editor.move_scroll_right(.{});
+    }
+
     fn mouse_click_button8(_: *Self, _: c_int, _: c_int, _: c_int, _: c_int) Result {
         try command.executeName("jump_back", .{});
     }