Implement floating windows with pointer and keyboard controls

Add interactive move/resize operations using configurable pointer bindings
(Mod4+BTN_LEFT to move, Mod4+BTN_RIGHT to resize). Tiled windows
automatically float when dragged or resized.

Add keyboard commands for floating windows:
- move_up/down/left/right: move by pixel amount
- resize_width/height: resize by pixel amount
- swap_next/swap_prev: swap position in window stack

Fix float dimension initialization when windows first become floating,
and fix clamp crash when resizing windows larger than output bounds.

Update example config with documented keybinds and new pointer_binds block.

README.md

@@ -10,7 +10,6 @@ SPDX-License-Identifier: GPL-3.0-or-later
 
 These are in rough order of my priority, though no promises I do them in this order.
 
-- [ ] Support floating windows
 - [ ] Support wallpapers
 - [ ] Support a bar
 - [ ] Support starting programs at WM launch
@@ -19,6 +18,7 @@ These are in rough order of my priority, though no promises I do them in this or
 - [ ] Make "orelse return" bits into errors; handle gracefully
 - [ ] Support multiple seats
 - [ ] Support clipping floating windows on edge of/between outputs
-- [x] Support changeable primary count
 - [x] Support changeable primary ratio
+- [x] Support changeable primary count
 - [x] Support multiple outputs
+- [X] Support floating windows

examples/config.kdl

@@ -1,31 +1,68 @@
+// Whether new windows should go to the top or bottom of the window stack
 attach_mode top
+// Whether mousing over a new window should move focus
 focus_follows_pointer #true
+// Whether the focus should warp to the center of newly-focused windows
 pointer_warp_on_focus_change #true
 borders {
     width 2
+    // 8 or 10 digit hex color
     color_focused "0x89b4fa"
     color_unfocused "0x1e1e2e"
 }
 keybinds {
+    // Swap a window
     spawn Mod4 T foot
+    // Move focus up or down the windows stack
     focus_next_window Mod4 J
     focus_prev_window Mod4 K
-    focus_next_output Mod4+Shift J
+    // Move focus between windows
-    focus_prev_output Mod4+Shift K
+    focus_next_output Mod4 Period
-    send_to_next_output Mod1+Shift J
+    focus_prev_output Mod4 Comma
-    send_to_prev_output Mod1+Shift K
+    // Move windows between outputs
+    send_to_next_output Mod4+Shift Period
+    send_to_prev_output Mod4+Shift Comma
+    // Swap the currently-focused window with the current primary
     zoom Mod4 Z
+    // Float/unfloat the currently-focused window
     toggle_float Mod4+Shift F
-    change_ratio Mod4 H +0.05
+    // Change the primary ratio of the current output
+    change_ratio Mod4 H 0.05
     change_ratio Mod4 L -0.05
+    // Change the number of windows in the primary side
     increment_primary_count Mod4 I
     decrement_primary_count Mod4 D
+    // Reload config file
     reload_config Mod4+Shift R
+    // Toggle fullscreen on the currently-focused window
     toggle_fullscreen Mod4 F
+    // Close the currently-focused window
     close_window Mod4+Shift Q
-    // Generates keybinds for keys 1-9 → tags 1<<0 through 1<<9
+    // Move windows up or down the stack
+    swap_next Mod4+Shift N
+    swap_prev Mod4+Shift P
+    // Move floating windows; noop on tiled windows
+    move_left Mod4+Shift H 100
+    move_down Mod4+Shift J 100
+    move_up Mod4+Shift K 100
+    move_right Mod4+Shift L 100
+    // Resize floating windows; noop on tiled windows
+    resize_width Mod4+Alt+Shift H -100
+    resize_height Mod4+Alt+Shift J 100
+    resize_height Mod4+Alt+Shift K -100
+    resize_width Mod4+Alt+Shift L 100
+    // Special command to generate keybinds for keys 1-9 and tags 1<<0 through 1<<9
     tag_bind Mod4 set_output_tags
-    tag_bind Mod4+shift set_window_tags
+    tag_bind Mod4+Shift set_window_tags
-    tag_bind Mod4+ctrl toggle_output_tags
+    tag_bind Mod4+Ctrl toggle_output_tags
-    tag_bind Mod4+ctrl+shift toggle_window_tags
+    tag_bind Mod4+Ctrl+Shift toggle_window_tags
 }
+pointer_binds {
+    // Mod4 + Left click to move floating windows;
+    // tiled windows will automatically float if moved
+    move_window Mod4 BTN_LEFT
+    // Mod4 + Right click to resize floating windows;
+    // tiled windows will automatically float if resized
+    resize_window Mod4 BTN_RIGHT
+}
+

src/Config.zig

@@ -21,8 +21,9 @@ focus_follows_pointer: bool = true,
 pointer_warp_on_focus_change: bool = true,
 
 /// Tag bind entries parsed from config (tag_bind nodes in keybinds block)
-tag_binds: std.ArrayListUnmanaged(Keybind) = .{},
+tag_binds: std.ArrayList(Keybind) = .{},
-keybinds: std.ArrayListUnmanaged(Keybind) = .{},
+keybinds: std.ArrayList(Keybind) = .{},
+pointer_binds: std.ArrayList(PointerBind) = .{},
 
 pub const Keybind = struct {
     modifiers: river.SeatV1.Modifiers,
@@ -30,6 +31,17 @@ pub const Keybind = struct {
     keysym: ?xkbcommon.Keysym,
 };
 
+pub const PointerBind = struct {
+    modifiers: river.SeatV1.Modifiers,
+    button: u32, // Linux button code (BTN_LEFT=0x110, BTN_RIGHT=0x111, BTN_MIDDLE=0x112)
+    action: PointerAction,
+};
+
+pub const PointerAction = enum {
+    move_window,
+    resize_window,
+};
+
 pub const AttachMode = enum {
     top,
     bottom,
@@ -41,6 +53,7 @@ const NodeName = enum {
     pointer_warp_on_focus_change,
     borders,
     keybinds,
+    pointer_binds,
 };
 
 const BorderNodeName = enum {
@@ -49,6 +62,11 @@ const BorderNodeName = enum {
     color_unfocused,
 };
 
+const PointerBindNodeName = enum {
+    move_window,
+    resize_window,
+};
+
 // We can just directly use the tag type from Command as our node name
 const KeybindNodeName = @typeInfo(XkbBindings.Command).@"union".tag_type.?;
 
@@ -82,6 +100,7 @@ pub fn create() !*Config {
             }
             config.keybinds.clearAndFree(utils.allocator);
             config.tag_binds.clearAndFree(utils.allocator);
+            config.pointer_binds.clearAndFree(utils.allocator);
             config.* = .{};
         };
     }
@@ -101,6 +120,7 @@ pub fn destroy(config: *Config) void {
     }
     config.keybinds.deinit(utils.allocator);
     config.tag_binds.deinit(utils.allocator);
+    config.pointer_binds.deinit(utils.allocator);
     utils.allocator.destroy(config);
 }
 
@@ -161,6 +181,9 @@ fn load(config: *Config, reader: *Io.Reader) !void {
                         .keybinds => {
                             next_child_block = .keybinds;
                         },
+                        .pointer_binds => {
+                            next_child_block = .pointer_binds;
+                        },
                     }
                 } else {
                     logWarnInvalidNode(node.name);
@@ -171,6 +194,7 @@ fn load(config: *Config, reader: *Io.Reader) !void {
                     switch (child_block) {
                         .borders => try config.loadBordersChildBlock(&parser),
                         .keybinds => try config.loadKeybindsChildBlock(&parser),
+                        .pointer_binds => try config.loadPointerBindsChildBlock(&parser),
                         else => {
                             // Nothing else should ever be marked as a next_child_block
                             unreachable;
@@ -337,10 +361,29 @@ fn loadKeybindsChildBlock(config: *Config, parser: *kdl.Parser) !void {
                         .close_window,
                         .increment_primary_count,
                         .decrement_primary_count,
+                        .swap_next,
+                        .swap_prev,
                         => |cmd| {
                             // None of these have arguments, just create the union and give it back
                             break :sw @unionInit(XkbBindings.Command, @tagName(cmd), {});
                         },
+                        inline .move_up,
+                        .move_down,
+                        .move_left,
+                        .move_right,
+                        .resize_width,
+                        .resize_height,
+                        => |cmd| {
+                            const amount_str = utils.stripQuotes(node.arg(parser, 2) orelse {
+                                logWarnMissingNodeArg(name, "amount");
+                                continue;
+                            });
+                            const amount = fmt.parseInt(i32, amount_str, 0) catch {
+                                logWarnInvalidNodeArg(name, amount_str);
+                                continue;
+                            };
+                            break :sw @unionInit(XkbBindings.Command, @tagName(cmd), amount);
+                        },
                         inline .set_output_tags, .set_window_tags, .toggle_output_tags, .toggle_window_tags => |cmd| {
                             const tags_str = utils.stripQuotes(node.arg(parser, 2) orelse {
                                 logWarnMissingNodeArg(name, "tags");
@@ -375,6 +418,76 @@ fn loadKeybindsChildBlock(config: *Config, parser: *kdl.Parser) !void {
     }
 }
 
+fn loadPointerBindsChildBlock(config: *Config, parser: *kdl.Parser) !void {
+    while (try parser.next()) |event| {
+        switch (event) {
+            .node => |node| {
+                const node_name = std.meta.stringToEnum(PointerBindNodeName, node.name);
+                if (node_name) |name| {
+                    // Parse modifiers (arg 0)
+                    const mod_str = utils.stripQuotes(node.arg(parser, 0) orelse {
+                        logWarnMissingNodeArg(name, "modifier(s)");
+                        continue;
+                    });
+                    const modifiers = try utils.parseModifiers(mod_str) orelse {
+                        logWarnInvalidNodeArg(name, mod_str);
+                        continue;
+                    };
+
+                    // Parse button (arg 1)
+                    const button_str = utils.stripQuotes(node.arg(parser, 1) orelse {
+                        logWarnMissingNodeArg(name, "button");
+                        continue;
+                    });
+                    const button = parseButton(button_str) orelse {
+                        logWarnInvalidNodeArg(name, button_str);
+                        continue;
+                    };
+
+                    const action: PointerAction = switch (name) {
+                        .move_window => .move_window,
+                        .resize_window => .resize_window,
+                    };
+
+                    try config.pointer_binds.append(utils.allocator, .{
+                        .modifiers = modifiers,
+                        .button = button,
+                        .action = action,
+                    });
+
+                    log.debug("pointer_binds.{s}: {s} {s}", .{ @tagName(name), mod_str, button_str });
+                } else {
+                    logWarnInvalidNode(node.name);
+                }
+            },
+            .child_block_begin => {
+                try config.skipChildBlock(parser);
+            },
+            .child_block_end => {
+                return;
+            },
+        }
+    }
+}
+
+fn parseButton(s: []const u8) ?u32 {
+    // Support both numeric and named buttons
+    var lower_buf: [16]u8 = undefined;
+    const len = @min(s.len, 16);
+    const lower = std.ascii.lowerString(lower_buf[0..len], s[0..len]);
+
+    if (mem.eql(u8, lower, "btn_left") or mem.eql(u8, lower, "button1")) {
+        return 0x110; // BTN_LEFT = 272
+    } else if (mem.eql(u8, lower, "btn_right") or mem.eql(u8, lower, "button3")) {
+        return 0x111; // BTN_RIGHT = 273
+    } else if (mem.eql(u8, lower, "btn_middle") or mem.eql(u8, lower, "button2")) {
+        return 0x112; // BTN_MIDDLE = 274
+    }
+
+    // Try parsing as hex or decimal
+    return fmt.parseInt(u32, s, 0) catch null;
+}
+
 /// Skips an entire child block including any nested child blocks
 fn skipChildBlock(_: *Config, parser: *kdl.Parser) !void {
     log.warn("Unexpected child block. Skipping it", .{});
@@ -422,6 +535,7 @@ fn logWarnInvalidNodeArg(node_name: anytype, node_value: []const u8) void {
         NodeName => log.warn("Invalid \"{s}\" ({s}). Using default value", .{ @tagName(node_name), node_value }),
         BorderNodeName => log.warn("Invalid \"border.{s}\" ({s}). Using default value", .{ @tagName(node_name), node_value }),
         KeybindNodeName => log.warn("Invalid \"keybind.{s}\" ({s}). Ignoring", .{ @tagName(node_name), node_value }),
+        PointerBindNodeName => log.warn("Invalid \"pointer_binds.{s}\" ({s}). Ignoring", .{ @tagName(node_name), node_value }),
         else => @compileError("This function does not (yet) support type \"" ++ @typeName(node_name_type) ++ "\""),
     }
 }
@@ -430,6 +544,7 @@ fn logWarnMissingNodeArg(node_name: anytype, comptime arg: []const u8) void {
     const node_name_type = @TypeOf(node_name);
     switch (node_name_type) {
         KeybindNodeName => log.warn("\"keybind.{s}\" missing " ++ arg ++ " argument. Ignoring", .{@tagName(node_name)}),
+        PointerBindNodeName => log.warn("\"pointer_binds.{s}\" missing " ++ arg ++ " argument. Ignoring", .{@tagName(node_name)}),
         else => @compileError("This function does not (yet) support type \"" ++ @typeName(node_name_type) ++ "\""),
     }
 }

src/Seat.zig

@@ -11,16 +11,27 @@ river_seat_v1: *river.SeatV1,
 focused_window: ?*Window,
 focused_output: ?*Output,
 
+pointer_op: PointerOp = .none,
+
 /// State consumed in manage phase, reset at end of manage().
 pending_manage: PendingManage = .{},
 
 link: wl.list.Link,
 
+// Pointer bindings for interactive move/resize
+move_pointer_binding: ?*river.PointerBindingV1 = null,
+resize_pointer_binding: ?*river.PointerBindingV1 = null,
+
 pub const PendingManage = struct {
     window: ?PendingWindow = null,
     output: ?PendingOutput = null,
     should_warp_pointer: bool = false,
 
+    op_delta: ?struct { dx: i32, dy: i32 } = null,
+    op_released: bool = false,
+    pointer_move_request: ?*Window = null,
+    pointer_resize_request: ?struct { window: *Window, edges: river.WindowV1.Edges } = null,
+
     pub const PendingWindow = union(enum) {
         window: *Window,
         clear_focus,
@@ -32,6 +43,19 @@ pub const PendingManage = struct {
     };
 };
 
+pub const PointerOp = union(enum) {
+    none,
+    move: struct { window: *Window, start_x: i32, start_y: i32 },
+    resize: struct {
+        window: *Window,
+        start_width: u31,
+        start_height: u31,
+        start_x: i32,
+        start_y: i32,
+        edges: river.WindowV1.Edges,
+    },
+};
+
 pub fn create(context: *Context, river_seat_v1: *river.SeatV1) !*Seat {
     var seat = try utils.allocator.create(Seat);
     errdefer seat.destroy();
@@ -50,6 +74,8 @@ pub fn create(context: *Context, river_seat_v1: *river.SeatV1) !*Seat {
 }
 
 pub fn destroy(seat: *Seat) void {
+    if (seat.move_pointer_binding) |binding| binding.destroy();
+    if (seat.resize_pointer_binding) |binding| binding.destroy();
     seat.river_seat_v1.destroy();
     utils.allocator.destroy(seat);
 }
@@ -65,6 +91,12 @@ fn seatListener(river_seat_v1: *river.SeatV1, event: river.SeatV1.Event, seat: *
             seat.setWindowFocus(ev.window);
         },
         .window_interaction => |ev| seat.setWindowFocus(ev.window),
+        .op_delta => |ev| {
+            seat.pending_manage.op_delta = .{ .dx = ev.dx, .dy = ev.dy };
+        },
+        .op_release => {
+            seat.pending_manage.op_released = true;
+        },
         else => |ev| {
             log.debug("unhandled event: {s}", .{@tagName(ev)});
         },
@@ -129,12 +161,160 @@ pub fn manage(seat: *Seat) void {
             seat.river_seat_v1.pointerWarp(pointer_x, pointer_y);
         }
     }
+
+    // Interactive move/resize operations
+
+    // Start move operation
+    if (seat.pending_manage.pointer_move_request) |window| {
+        if (window.floating) {
+            seat.pointer_op = .{
+                .move = .{
+                    .window = window,
+                    .start_x = window.float_x,
+                    .start_y = window.float_y,
+                },
+            };
+            seat.river_seat_v1.opStartPointer();
+        }
+    }
+
+    // Start resize operation
+    if (seat.pending_manage.pointer_resize_request) |req| {
+        if (req.window.floating) {
+            seat.pointer_op = .{
+                .resize = .{
+                    .window = req.window,
+                    .start_width = req.window.float_width,
+                    .start_height = req.window.float_height,
+                    .start_x = req.window.float_x,
+                    .start_y = req.window.float_y,
+                    .edges = req.edges,
+                },
+            };
+            seat.river_seat_v1.opStartPointer();
+            req.window.river_window_v1.informResizeStart();
+        }
+    }
+
+    // Process pointer delta (mouse movement during operation)
+    if (seat.pending_manage.op_delta) |delta| {
+        switch (seat.pointer_op) {
+            .none => {},
+            .move => |op| {
+                const output = op.window.output orelse return;
+                const min_x = output.x;
+                const max_x = output.x + output.width - @as(i32, op.window.float_width);
+                const min_y = output.y;
+                const max_y = output.y + output.height - @as(i32, op.window.float_height);
+
+                op.window.float_x = std.math.clamp(op.start_x + delta.dx, min_x, @max(min_x, max_x));
+                op.window.float_y = std.math.clamp(op.start_y + delta.dy, min_y, @max(min_y, max_y));
+                op.window.pending_render.x = op.window.float_x;
+                op.window.pending_render.y = op.window.float_y;
+            },
+            .resize => |op| {
+                var new_width: i32 = op.start_width;
+                var new_height: i32 = op.start_height;
+                var new_x: i32 = op.start_x;
+                var new_y: i32 = op.start_y;
+
+                // Adjust based on which edges are being dragged
+                if (op.edges.right) new_width += delta.dx;
+                if (op.edges.left) {
+                    new_width -= delta.dx;
+                    new_x += delta.dx;
+                }
+                if (op.edges.bottom) new_height += delta.dy;
+                if (op.edges.top) {
+                    new_height -= delta.dy;
+                    new_y += delta.dy;
+                }
+
+                // Clamp to minimum size
+                const min_size: i32 = 50;
+                if (new_width < min_size) {
+                    if (op.edges.left) new_x -= min_size - new_width;
+                    new_width = min_size;
+                }
+                if (new_height < min_size) {
+                    if (op.edges.top) new_y -= min_size - new_height;
+                    new_height = min_size;
+                }
+
+                // Clamp position to output bounds
+                const output = op.window.output orelse return;
+                new_x = std.math.clamp(new_x, output.x, @max(output.x, output.x + output.width - new_width));
+                new_y = std.math.clamp(new_y, output.y, @max(output.y, output.y + output.height - new_height));
+
+                op.window.float_width = @intCast(new_width);
+                op.window.float_height = @intCast(new_height);
+                op.window.float_x = new_x;
+                op.window.float_y = new_y;
+
+                op.window.river_window_v1.proposeDimensions(
+                    op.window.float_width,
+                    op.window.float_height,
+                );
+                op.window.pending_render.x = op.window.float_x;
+                op.window.pending_render.y = op.window.float_y;
+            },
+        }
+    }
+
+    // Process pointer release (end of operation)
+    if (seat.pending_manage.op_released) {
+        switch (seat.pointer_op) {
+            .none => {},
+            .move => {
+                seat.river_seat_v1.opEnd();
+                seat.pointer_op = .none;
+            },
+            .resize => |op| {
+                op.window.river_window_v1.informResizeEnd();
+                seat.river_seat_v1.opEnd();
+                seat.pointer_op = .none;
+            },
+        }
+    }
 }
 
 pub fn render(seat: *Seat) void {
     _ = seat;
 }
 
+pub fn movePointerBindingListener(_: *river.PointerBindingV1, event: river.PointerBindingV1.Event, seat: *Seat) void {
+    switch (event) {
+        .pressed => {
+            const window = seat.focused_window orelse return;
+            if (!window.floating) {
+                // Auto-float on drag
+                window.pending_manage.floating = true;
+            }
+            seat.pending_manage.pointer_move_request = window;
+            seat.context.wm.river_window_manager_v1.manageDirty();
+        },
+        .released => {},
+    }
+}
+
+pub fn resizePointerBindingListener(_: *river.PointerBindingV1, event: river.PointerBindingV1.Event, seat: *Seat) void {
+    switch (event) {
+        .pressed => {
+            const window = seat.focused_window orelse return;
+            if (!window.floating) {
+                // Auto-float on drag
+                window.pending_manage.floating = true;
+            }
+            seat.pending_manage.pointer_resize_request = .{
+                .window = window,
+                .edges = .{ .bottom = true, .right = true },
+            };
+            seat.context.wm.river_window_manager_v1.manageDirty();
+        },
+        .released => {},
+    }
+}
+
 const std = @import("std");
 const assert = std.debug.assert;
 

src/Window.zig

@@ -97,24 +97,43 @@ fn windowListener(river_window_v1: *river.WindowV1, event: river.WindowV1.Event,
     assert(window.river_window_v1 == river_window_v1);
     switch (event) {
         .closed => {
-            {
+            // Clear any pointer operations referencing this window
-                // If there's no output, we don't really care about focus and can skip this event
+            var seat_it = window.context.wm.seats.iterator(.forward);
-                const output = if (window.output) |output| output else return;
+            while (seat_it.next()) |seat| {
-                var it = window.context.wm.seats.iterator(.forward);
+                switch (seat.pointer_op) {
-                while (it.next()) |seat| {
+                    .move => |op| if (op.window == window) {
-                    if (seat.focused_window == window) {
+                        seat.river_seat_v1.opEnd();
-                        // Find another window to focus and warp pointer there
+                        seat.pointer_op = .none;
-                        if (output.prevWindow(window)) |next_focus| {
+                    },
-                            if (next_focus != window) {
+                    .resize => |op| if (op.window == window) {
-                                seat.pending_manage.window = .{ .window = next_focus };
+                        seat.river_seat_v1.opEnd();
-                                seat.pending_manage.should_warp_pointer = true;
+                        seat.pointer_op = .none;
-                            } else {
+                    },
-                                // Only window in list - clear focus
+                    .none => {},
-                                seat.pending_manage.window = .clear_focus;
+                }
-                            }
+                if (seat.pending_manage.pointer_move_request == window)
+                    seat.pending_manage.pointer_move_request = null;
+                if (seat.pending_manage.pointer_resize_request) |req| {
+                    if (req.window == window)
+                        seat.pending_manage.pointer_resize_request = null;
+                }
+            }
+            // If there's no output, we don't really care about focus and can skip this event
+            const output = if (window.output) |output| output else return;
+            var it = window.context.wm.seats.iterator(.forward);
+            while (it.next()) |seat| {
+                if (seat.focused_window == window) {
+                    // Find another window to focus and warp pointer there
+                    if (output.prevWindow(window)) |next_focus| {
+                        if (next_focus != window) {
+                            seat.pending_manage.window = .{ .window = next_focus };
+                            seat.pending_manage.should_warp_pointer = true;
                         } else {
+                            // Only window in list - clear focus
                             seat.pending_manage.window = .clear_focus;
                         }
+                    } else {
+                        seat.pending_manage.window = .clear_focus;
                     }
                 }
             }
@@ -167,6 +186,8 @@ pub fn manage(window: *Window) void {
 
             if (window.float_width == 0) {
                 // Never floated before; use current dimensions but centered on output
+                window.float_width = window.width;
+                window.float_height = window.height;
                 if (window.output) |output| {
                     // Need to find center and then subtract half of the window's width/height
                     window.float_x = output.x + @divTrunc(output.width, 2) - @divTrunc(window.width, 2);
@@ -287,5 +308,6 @@ const river = wayland.client.river;
 const utils = @import("utils.zig");
 const Context = @import("Context.zig");
 const Output = @import("Output.zig");
+const Seat = @import("Seat.zig");
 
 const log = std.log.scoped(.Window);

src/WindowManager.zig

@@ -110,6 +110,28 @@ fn manage_start(wm: *WindowManager) void {
             std.debug.assert(keybind.keysym != null);
             context.xkb_bindings.addBinding(river_seat_v1, keybind.keysym.?, keybind.modifiers, keybind.command);
         }
+
+        // Pointer bindings
+        for (context.config.pointer_binds.items) |pointer_bind| {
+            const binding = river_seat_v1.getPointerBinding(pointer_bind.button, pointer_bind.modifiers) catch {
+                log.err("Failed to create pointer binding", .{});
+                continue;
+            };
+
+            switch (pointer_bind.action) {
+                .move_window => {
+                    if (seat.move_pointer_binding) |old| old.destroy();
+                    binding.setListener(*Seat, Seat.movePointerBindingListener, seat);
+                    seat.move_pointer_binding = binding;
+                },
+                .resize_window => {
+                    if (seat.resize_pointer_binding) |old| old.destroy();
+                    binding.setListener(*Seat, Seat.resizePointerBindingListener, seat);
+                    seat.resize_pointer_binding = binding;
+                },
+            }
+            binding.enable();
+        }
     }
 
     {

src/XkbBindings.zig

@@ -30,6 +30,20 @@ pub const Command = union(enum) {
     // spawn_tagmask: u32, // TODO
     // focus_previous_tags, // TODO
     // send_to_previous_tags, // TODO
+
+    // Move floating window by pixels
+    move_up: i32,
+    move_down: i32,
+    move_left: i32,
+    move_right: i32,
+
+    // Resize floating window by pixels
+    resize_width: i32,
+    resize_height: i32,
+
+    // Swap window position in stack
+    swap_next,
+    swap_prev,
 };
 
 const XkbBinding = struct {
@@ -214,6 +228,14 @@ const XkbBinding = struct {
                     context.wm.river_window_manager_v1.manageDirty();
                 }
             },
+            .move_up => |pixels| moveFloatingWindow(context, 0, -pixels),
+            .move_down => |pixels| moveFloatingWindow(context, 0, pixels),
+            .move_left => |pixels| moveFloatingWindow(context, -pixels, 0),
+            .move_right => |pixels| moveFloatingWindow(context, pixels, 0),
+            .resize_width => |delta| resizeFloatingWindow(context, delta, 0),
+            .resize_height => |delta| resizeFloatingWindow(context, 0, delta),
+            .swap_next => swapWindow(context, .next),
+            .swap_prev => swapWindow(context, .prev),
         }
     }
 
@@ -306,6 +328,61 @@ const XkbBinding = struct {
             window.pending_manage.pending_output = .{ .output = output };
         }
     }
+
+    fn moveFloatingWindow(context: *Context, dx: i32, dy: i32) void {
+        const seat = context.wm.seats.first() orelse return;
+        const window = seat.focused_window orelse return;
+        if (!window.floating) return;
+        const output = window.output orelse return;
+
+        const min_x = output.x;
+        const max_x = output.x + output.width - @as(i32, window.float_width);
+        const min_y = output.y;
+        const max_y = output.y + output.height - @as(i32, window.float_height);
+
+        window.float_x = std.math.clamp(window.float_x + dx, min_x, @max(min_x, max_x));
+        window.float_y = std.math.clamp(window.float_y + dy, min_y, @max(min_y, max_y));
+        window.pending_render.x = window.float_x;
+        window.pending_render.y = window.float_y;
+        context.wm.river_window_manager_v1.manageDirty();
+    }
+
+    fn resizeFloatingWindow(context: *Context, dw: i32, dh: i32) void {
+        const seat = context.wm.seats.first() orelse return;
+        const window = seat.focused_window orelse return;
+        if (!window.floating) return;
+        const output = window.output orelse return;
+
+        const new_width: i32 = @as(i32, window.float_width) + dw;
+        const new_height: i32 = @as(i32, window.float_height) + dh;
+        window.float_width = @intCast(@max(50, new_width));
+        window.float_height = @intCast(@max(50, new_height));
+
+        // Clamp position to keep window on screen after resize
+        const max_x = output.x + output.width - @as(i32, window.float_width);
+        const max_y = output.y + output.height - @as(i32, window.float_height);
+        window.float_x = std.math.clamp(window.float_x, output.x, @max(output.x, max_x));
+        window.float_y = std.math.clamp(window.float_y, output.y, @max(output.y, max_y));
+
+        window.pending_render.x = window.float_x;
+        window.pending_render.y = window.float_y;
+        window.river_window_v1.proposeDimensions(window.float_width, window.float_height);
+        context.wm.river_window_manager_v1.manageDirty();
+    }
+
+    fn swapWindow(context: *Context, comptime direction: enum { next, prev }) void {
+        const seat = context.wm.seats.first() orelse return;
+        const window = seat.focused_window orelse return;
+        const output = window.output orelse return;
+        const target = switch (direction) {
+            .next => output.nextWindow(window),
+            .prev => output.prevWindow(window),
+        } orelse return;
+        if (target != window) {
+            window.link.swapWith(&target.link);
+            context.wm.river_window_manager_v1.manageDirty();
+        }
+    }
 };
 
 context: *Context,