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-rw-r--r--src/main.zig786
1 files changed, 0 insertions, 786 deletions
diff --git a/src/main.zig b/src/main.zig
index e2982b3..9034289 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -2,718 +2,6 @@ const std = @import("std");
const c = @import("c.zig").c;
const man_c = @import("c.zig").manual;
-const Server = struct {
- wl_display: *c.wl_display,
- backend: *c.wlr_backend,
- renderer: *c.wlr_renderer,
- xdg_shell: *c.wlr_xdg_shell,
- new_xdg_surface: c.wl_listener,
- views: std.ArrayList(View),
-
- cursor: *c.wlr_cursor,
- cursor_mgr: *c.wlr_xcursor_manager,
- cursor_motion: c.wl_listener,
- cursor_motion_absolute: c.wl_listener,
- cursor_button: c.wl_listener,
- cursor_axis: c.wl_listener,
- cursor_frame: c.wl_listener,
-
- seat: *c.wlr_seat,
- new_input: c.wl_listener,
- request_cursor: c.wl_listener,
- keyboards: c.wl_list,
- cursor_mode: CursorMode,
- grabbed_view: ?*View,
- grab_x: f64,
- grab_y: f64,
- grab_width: c_int,
- grab_height: c_int,
- resize_edges: u32,
-
- output_layout: *c.wlr_output_layout,
- outputs: std.ArrayList(Output),
- new_output: c.wl_listener,
-};
-
-const Output = struct {
- server: *Server,
- wlr_output: *c.wlr_output,
- frame: c.wl_listener,
-};
-
-const View = struct {
- server: *Server,
- xdg_surface: *c.wlr_xdg_surface,
- map: c.wl_listener,
- unmap: c.wl_listener,
- destroy: c.wl_listener,
- request_move: c.wl_listener,
- request_resize: c.wl_listener,
- mapped: bool,
- x: c_int,
- y: c_int,
-};
-
-const Keyboard = struct {
- link: c.wl_list,
- server: *Server,
- device: *c.wlr_input_device,
-
- modifiers: c.wl_listener,
- key: c.wl_listener,
-};
-
-const CursorMode = enum {
- Passthrough,
- Move,
- Resize,
-};
-
-fn new_list() c.wl_list {
- return c.wl_list{
- .prev = null,
- .next = null,
- };
-}
-
-fn new_listener() c.wl_listener {
- return c.wl_listener{
- .link = new_list(),
- .notify = null,
- };
-}
-
-const RenderData = struct {
- output: *c.wlr_output,
- renderer: *c.wlr_renderer,
- view: *View,
- when: *c.struct_timespec,
-};
-
-fn render_surface(surface: [*c]c.wlr_surface, sx: c_int, sy: c_int, data: ?*c_void) callconv(.C) void {
- // This function is called for every surface that needs to be rendered.
- var rdata = @ptrCast(*RenderData, @alignCast(@alignOf(RenderData), data));
- var view = rdata.*.view;
- var output = rdata.*.output;
-
- // We first obtain a wlr_texture, which is a GPU resource. wlroots
- // automatically handles negotiating these with the client. The underlying
- // resource could be an opaque handle passed from the client, or the client
- // could have sent a pixel buffer which we copied to the GPU, or a few other
- // means. You don't have to worry about this, wlroots takes care of it.
- var texture = c.wlr_surface_get_texture(surface);
- if (texture == null) {
- return;
- }
-
- // The view has a position in layout coordinates. If you have two displays,
- // one next to the other, both 1080p, a view on the rightmost display might
- // have layout coordinates of 2000,100. We need to translate that to
- // output-local coordinates, or (2000 - 1920).
- var ox: f64 = 0.0;
- var oy: f64 = 0.0;
- c.wlr_output_layout_output_coords(view.*.server.*.output_layout, output, &ox, &oy);
- ox += @intToFloat(f64, view.*.x + sx);
- oy += @intToFloat(f64, view.*.y + sy);
-
- // We also have to apply the scale factor for HiDPI outputs. This is only
- // part of the puzzle, TinyWL does not fully support HiDPI.
- var box = c.wlr_box{
- .x = @floatToInt(c_int, ox * output.*.scale),
- .y = @floatToInt(c_int, oy * output.*.scale),
- .width = @floatToInt(c_int, @intToFloat(f32, surface.*.current.width) * output.*.scale),
- .height = @floatToInt(c_int, @intToFloat(f32, surface.*.current.height) * output.*.scale),
- };
-
- // Those familiar with OpenGL are also familiar with the role of matricies
- // in graphics programming. We need to prepare a matrix to render the view
- // with. wlr_matrix_project_box is a helper which takes a box with a desired
- // x, y coordinates, width and height, and an output geometry, then
- // prepares an orthographic projection and multiplies the necessary
- // transforms to produce a model-view-projection matrix.
- //
- // Naturally you can do this any way you like, for example to make a 3D
- // compositor.
- var matrix: [9]f32 = undefined;
- var transform = c.wlr_output_transform_invert(surface.*.current.transform);
- c.wlr_matrix_project_box(&matrix, &box, transform, 0.0, &output.*.transform_matrix);
-
- // This takes our matrix, the texture, and an alpha, and performs the actual
- // rendering on the GPU.
- _ = c.wlr_render_texture_with_matrix(rdata.*.renderer, texture, &matrix, 1.0);
-
- // This lets the client know that we've displayed that frame and it can
- // prepare another one now if it likes.
- c.wlr_surface_send_frame_done(surface, rdata.*.when);
-}
-
-fn output_frame(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This function is called every time an output is ready to display a frame,
- // generally at the output's refresh rate (e.g. 60Hz).
- var output = @fieldParentPtr(Output, "frame", listener);
- var renderer = output.*.server.*.renderer;
-
- var now: c.struct_timespec = undefined;
- _ = c.clock_gettime(c.CLOCK_MONOTONIC, &now);
-
- // wlr_output_attach_render makes the OpenGL context current.
- if (!c.wlr_output_attach_render(output.*.wlr_output, null)) {
- return;
- }
- // The "effective" resolution can change if you rotate your outputs.
- var width: c_int = undefined;
- var height: c_int = undefined;
- c.wlr_output_effective_resolution(output.*.wlr_output, &width, &height);
- // Begin the renderer (calls glViewport and some other GL sanity checks)
- c.wlr_renderer_begin(renderer, width, height);
-
- const color = [_]f32{ 0.3, 0.3, 0.3, 1.0 };
- c.wlr_renderer_clear(renderer, &color);
-
- // Each subsequent window we render is rendered on top of the last. Because
- // our view list is ordered front-to-back, we iterate over it backwards.
- for (output.*.server.views.span()) |*view| {
- if (!view.*.mapped) {
- // An unmapped view should not be rendered.
- continue;
- }
- var rdata = RenderData{
- .output = output.*.wlr_output,
- .view = view,
- .renderer = renderer,
- .when = &now,
- };
- // This calls our render_surface function for each surface among the
- // xdg_surface's toplevel and popups.
- c.wlr_xdg_surface_for_each_surface(view.*.xdg_surface, render_surface, &rdata);
- }
-
- // Hardware cursors are rendered by the GPU on a separate plane, and can be
- // moved around without re-rendering what's beneath them - which is more
- // efficient. However, not all hardware supports hardware cursors. For this
- // reason, wlroots provides a software fallback, which we ask it to render
- // here. wlr_cursor handles configuring hardware vs software cursors for you,
- // and this function is a no-op when hardware cursors are in use.
- c.wlr_output_render_software_cursors(output.*.wlr_output, null);
-
- // Conclude rendering and swap the buffers, showing the final frame
- // on-screen.
- c.wlr_renderer_end(renderer);
- // TODO: handle failure
- _ = c.wlr_output_commit(output.*.wlr_output);
-}
-
-fn server_new_output(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- var server = @fieldParentPtr(Server, "new_output", listener);
- var wlr_output = @ptrCast(*c.wlr_output, @alignCast(@alignOf(*c.wlr_output), data));
-
- // Some backends don't have modes. DRM+KMS does, and we need to set a mode
- // before we can use the output. The mode is a tuple of (width, height,
- // refresh rate), and each monitor supports only a specific set of modes. We
- // just pick the monitor's preferred mode, a more sophisticated compositor
- // would let the user configure it.
-
- // if not empty
- if (c.wl_list_empty(&wlr_output.*.modes) == 0) {
- var mode = c.wlr_output_preferred_mode(wlr_output);
- c.wlr_output_set_mode(wlr_output, mode);
- c.wlr_output_enable(wlr_output, true);
- if (!c.wlr_output_commit(wlr_output)) {
- return;
- }
- }
-
- // Allocates and configures our state for this output
- server.*.outputs.append(Output{
- .server = undefined,
- .wlr_output = undefined,
- .frame = undefined,
- }) catch unreachable;
- var output = &server.*.outputs.span()[server.*.outputs.span().len - 1];
- output.*.wlr_output = wlr_output;
- output.*.server = server;
-
- // Sets up a listener for the frame notify event.
- output.*.frame.notify = output_frame;
- c.wl_signal_add(&wlr_output.*.events.frame, &output.*.frame);
-
- // Adds this to the output layout. The add_auto function arranges outputs
- // from left-to-right in the order they appear. A more sophisticated
- // compositor would let the user configure the arrangement of outputs in the
- // layout.
- c.wlr_output_layout_add_auto(server.*.output_layout, wlr_output);
-
- // Creating the global adds a wl_output global to the display, which Wayland
- // clients can see to find out information about the output (such as
- // DPI, scale factor, manufacturer, etc).
- c.wlr_output_create_global(wlr_output);
-}
-
-fn focus_view(view: *View, surface: *c.wlr_surface) void {
- const server = view.server;
- const seat = server.*.seat;
- const prev_surface = seat.*.keyboard_state.focused_surface;
-
- if (prev_surface == surface) {
- // Don't re-focus an already focused surface.
- return;
- }
-
- if (prev_surface != null) {
- // Deactivate the previously focused surface. This lets the client know
- // it no longer has focus and the client will repaint accordingly, e.g.
- // stop displaying a caret.
- var prev_xdg_surface = c.wlr_xdg_surface_from_wlr_surface(prev_surface);
- _ = c.wlr_xdg_toplevel_set_activated(prev_xdg_surface, false);
- }
-
- // Find the index
- const idx = for (server.*.views.span()) |*v, i| {
- if (v == view) {
- break i;
- }
- } else unreachable;
-
- // Move the view to the front
- server.*.views.append(server.*.views.orderedRemove(idx)) catch unreachable;
-
- var moved_view = &server.*.views.span()[server.*.views.span().len - 1];
-
- // Activate the new surface
- _ = c.wlr_xdg_toplevel_set_activated(moved_view.*.xdg_surface, true);
-
- // Tell the seat to have the keyboard enter this surface. wlroots will keep
- // track of this and automatically send key events to the appropriate
- // clients without additional work on your part.
- var keyboard = c.wlr_seat_get_keyboard(seat);
- c.wlr_seat_keyboard_notify_enter(seat, moved_view.*.xdg_surface.*.surface, &keyboard.*.keycodes, keyboard.*.num_keycodes, &keyboard.*.modifiers);
-}
-
-fn xdg_surface_map(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // Called when the surface is mapped, or ready to display on-screen.
- var view = @fieldParentPtr(View, "map", listener);
- view.*.mapped = true;
- focus_view(view, view.*.xdg_surface.*.surface);
-}
-
-fn xdg_surface_unmap(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- var view = @fieldParentPtr(View, "unmap", listener);
- view.*.mapped = false;
-}
-
-fn xdg_surface_destroy(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- var view = @fieldParentPtr(View, "destroy", listener);
- var server = view.*.server;
- const idx = for (server.*.views.span()) |*v, i| {
- if (v == view) {
- break i;
- }
- } else return;
- _ = server.*.views.orderedRemove(idx);
-}
-
-fn xdg_toplevel_request_move(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // ignore for now
-}
-
-fn xdg_toplevel_request_resize(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // ignore for now
-}
-
-fn server_new_xdg_surface(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is raised when wlr_xdg_shell receives a new xdg surface from a
- // client, either a toplevel (application window) or popup.
- var server = @fieldParentPtr(Server, "new_xdg_surface", listener);
- var xdg_surface = @ptrCast(*c.wlr_xdg_surface, @alignCast(@alignOf(*c.wlr_xdg_surface), data));
-
- if (xdg_surface.*.role != c.enum_wlr_xdg_surface_role.WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
- return;
- }
-
- // Allocate a View for this surface
- server.*.views.append(undefined) catch unreachable;
- var view = &server.*.views.span()[server.*.views.span().len - 1];
-
- view.*.server = server;
- view.*.xdg_surface = xdg_surface;
-
- // Listen to the various events it can emit
- view.*.map.notify = xdg_surface_map;
- c.wl_signal_add(&xdg_surface.*.events.map, &view.*.map);
-
- view.*.unmap.notify = xdg_surface_unmap;
- c.wl_signal_add(&xdg_surface.*.events.unmap, &view.*.unmap);
-
- view.*.destroy.notify = xdg_surface_destroy;
- c.wl_signal_add(&xdg_surface.*.events.destroy, &view.*.destroy);
-
- var toplevel = xdg_surface.*.unnamed_160.toplevel;
- view.*.request_move.notify = xdg_toplevel_request_move;
- c.wl_signal_add(&toplevel.*.events.request_move, &view.*.request_move);
-
- view.*.request_resize.notify = xdg_toplevel_request_resize;
- c.wl_signal_add(&toplevel.*.events.request_resize, &view.*.request_resize);
-}
-
-fn keyboard_handle_modifiers(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is raised when a modifier key, such as shift or alt, is
- // pressed. We simply communicate this to the client. */
- var keyboard = @fieldParentPtr(Keyboard, "modifiers", listener);
-
- // A seat can only have one keyboard, but this is a limitation of the
- // Wayland protocol - not wlroots. We assign all connected keyboards to the
- // same seat. You can swap out the underlying wlr_keyboard like this and
- // wlr_seat handles this transparently.
- c.wlr_seat_set_keyboard(keyboard.*.server.*.seat, keyboard.*.device);
-
- // Send modifiers to the client.
- c.wlr_seat_keyboard_notify_modifiers(keyboard.*.server.*.seat, &keyboard.*.device.*.unnamed_37.keyboard.*.modifiers);
-}
-
-fn handle_keybinding(server: *Server, sym: c.xkb_keysym_t) bool {
- // Here we handle compositor keybindings. This is when the compositor is
- // processing keys, rather than passing them on to the client for its own
- // processing.
- //
- // This function assumes the proper modifier is held down.
- switch (sym) {
- c.XKB_KEY_Escape => c.wl_display_terminate(server.*.wl_display),
- c.XKB_KEY_F1 => {
- // Cycle to the next view
- //if (c.wl_list_length(&server.*.views) > 1) {
- // const current_view = @fieldParentPtr(View, "link", server.*.views.next);
- // const next_view = @fieldParentPtr(View, "link", current_view.*.link.next);
- // focus_view(next_view, next_view.*.xdg_surface.*.surface);
- // // Move the previous view to the end of the list
- // c.wl_list_remove(&current_view.*.link);
- // c.wl_list_insert(server.*.views.prev, &current_view.*.link);
- //}
- },
- else => return false,
- }
- return true;
-}
-
-fn keyboard_handle_key(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is raised when a key is pressed or released.
- const keyboard = @fieldParentPtr(Keyboard, "key", listener);
- const event = @ptrCast(*c.wlr_event_keyboard_key, @alignCast(@alignOf(*c.wlr_event_keyboard_key), data));
-
- const server = keyboard.*.server;
- const seat = server.*.seat;
- const keyboard_device = keyboard.*.device.*.unnamed_37.keyboard;
-
- // Translate libinput keycode -> xkbcommon
- const keycode = event.*.keycode + 8;
- // Get a list of keysyms based on the keymap for this keyboard
- var syms: [*c]c.xkb_keysym_t = undefined;
- const nsyms = c.xkb_state_key_get_syms(keyboard_device.*.xkb_state, keycode, &syms);
-
- var handled = false;
- const modifiers = c.wlr_keyboard_get_modifiers(keyboard_device);
- if (modifiers & @intCast(u32, c.WLR_MODIFIER_LOGO) != 0 and event.*.state == c.enum_wlr_key_state.WLR_KEY_PRESSED) {
- // If mod is held down and this button was _pressed_, we attempt to
- // process it as a compositor keybinding.
- var i: usize = 0;
- while (i < nsyms) {
- handled = handle_keybinding(server, syms[i]);
- if (handled) {
- break;
- }
- i += 1;
- }
- }
-
- if (!handled) {
- // Otherwise, we pass it along to the client.
- c.wlr_seat_set_keyboard(seat, keyboard.*.device);
- c.wlr_seat_keyboard_notify_key(seat, event.*.time_msec, event.*.keycode, @intCast(u32, @enumToInt(event.*.state)));
- }
-}
-
-fn server_new_keyboard(server: *Server, device: *c.wlr_input_device) void {
- var keyboard = std.heap.c_allocator.create(Keyboard) catch unreachable;
- keyboard.*.server = server;
- keyboard.*.device = device;
-
- // We need to prepare an XKB keymap and assign it to the keyboard. This
- // assumes the defaults (e.g. layout = "us").
- const rules = c.xkb_rule_names{
- .rules = null,
- .model = null,
- .layout = null,
- .variant = null,
- .options = null,
- };
- const context = c.xkb_context_new(c.enum_xkb_context_flags.XKB_CONTEXT_NO_FLAGS);
- defer c.xkb_context_unref(context);
-
- const keymap = man_c.xkb_map_new_from_names(context, &rules, c.enum_xkb_keymap_compile_flags.XKB_KEYMAP_COMPILE_NO_FLAGS);
- defer c.xkb_keymap_unref(keymap);
-
- var keyboard_device = device.*.unnamed_37.keyboard;
- c.wlr_keyboard_set_keymap(keyboard_device, keymap);
- c.wlr_keyboard_set_repeat_info(keyboard_device, 25, 600);
-
- // Setup listeners for keyboard events
- keyboard.*.modifiers.notify = keyboard_handle_modifiers;
- c.wl_signal_add(&keyboard_device.*.events.modifiers, &keyboard.*.modifiers);
- keyboard.*.key.notify = keyboard_handle_key;
- c.wl_signal_add(&keyboard_device.*.events.key, &keyboard.*.key);
-
- c.wlr_seat_set_keyboard(server.*.seat, device);
-
- // And add the keyboard to our list of keyboards
- c.wl_list_insert(&server.*.keyboards, &keyboard.*.link);
-}
-
-fn server_new_pointer(server: *Server, device: *c.struct_wlr_input_device) void {
- // We don't do anything special with pointers. All of our pointer handling
- // is proxied through wlr_cursor. On another compositor, you might take this
- // opportunity to do libinput configuration on the device to set
- // acceleration, etc.
- c.wlr_cursor_attach_input_device(server.*.cursor, device);
-}
-
-fn server_new_input(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is raised by the backend when a new input device becomes available.
- var server = @fieldParentPtr(Server, "new_input", listener);
- var device = @ptrCast(*c.wlr_input_device, @alignCast(@alignOf(*c.wlr_input_device), data));
-
- switch (device.*.type) {
- .WLR_INPUT_DEVICE_KEYBOARD => server_new_keyboard(server, device),
- .WLR_INPUT_DEVICE_POINTER => server_new_pointer(server, device),
- else => {},
- }
-
- // We need to let the wlr_seat know what our capabilities are, which is
- // communiciated to the client. In TinyWL we always have a cursor, even if
- // there are no pointer devices, so we always include that capability.
- var caps: u32 = @intCast(u32, c.WL_SEAT_CAPABILITY_POINTER);
- // if list not empty
- if (c.wl_list_empty(&server.*.keyboards) == 0) {
- caps |= @intCast(u32, c.WL_SEAT_CAPABILITY_KEYBOARD);
- }
- c.wlr_seat_set_capabilities(server.*.seat, caps);
-}
-
-fn seat_request_cursor(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is rasied by the seat when a client provides a cursor image
- var server = @fieldParentPtr(Server, "request_cursor", listener);
- var event = @ptrCast(*c.wlr_seat_pointer_request_set_cursor_event, @alignCast(@alignOf(*c.wlr_seat_pointer_request_set_cursor_event), data));
- var focused_client = server.*.seat.*.pointer_state.focused_client;
-
- // This can be sent by any client, so we check to make sure this one is
- // actually has pointer focus first.
- if (focused_client == event.*.seat_client) {
- // Once we've vetted the client, we can tell the cursor to use the
- // provided surface as the cursor image. It will set the hardware cursor
- // on the output that it's currently on and continue to do so as the
- // cursor moves between outputs.
- c.wlr_cursor_set_surface(server.*.cursor, event.*.surface, event.*.hotspot_x, event.*.hotspot_y);
- }
-}
-
-fn view_at(view: *View, lx: f64, ly: f64, surface: *?*c.wlr_surface, sx: *f64, sy: *f64) bool {
- // XDG toplevels may have nested surfaces, such as popup windows for context
- // menus or tooltips. This function tests if any of those are underneath the
- // coordinates lx and ly (in output Layout Coordinates). If so, it sets the
- // surface pointer to that wlr_surface and the sx and sy coordinates to the
- // coordinates relative to that surface's top-left corner.
- var view_sx = lx - @intToFloat(f64, view.*.x);
- var view_sy = ly - @intToFloat(f64, view.*.y);
-
- // This variable seems to have been unsued in TinyWL
- // struct wlr_surface_state *state = &view->xdg_surface->surface->current;
-
- var _sx: f64 = undefined;
- var _sy: f64 = undefined;
- var _surface = c.wlr_xdg_surface_surface_at(view.*.xdg_surface, view_sx, view_sy, &_sx, &_sy);
-
- if (_surface) |surface_at| {
- sx.* = _sx;
- sy.* = _sy;
- surface.* = surface_at;
- return true;
- }
-
- return false;
-}
-
-fn desktop_view_at(server: *Server, lx: f64, ly: f64, surface: *?*c.wlr_surface, sx: *f64, sy: *f64) ?*View {
- // This iterates over all of our surfaces and attempts to find one under the
- // cursor. This relies on server.*.views being ordered from top-to-bottom.
- for (server.*.views.span()) |*view| {
- if (view_at(view, lx, ly, surface, sx, sy)) {
- return view;
- }
- }
- return null;
-}
-
-fn process_cursor_move(server: *Server, time: u32) void {
- // Move the grabbed view to the new position.
- server.*.grabbed_view.?.*.x = @floatToInt(c_int, server.*.cursor.*.x - server.*.grab_x);
- server.*.grabbed_view.?.*.y = @floatToInt(c_int, server.*.cursor.*.y - server.*.grab_y);
-}
-
-fn process_cursor_resize(server: *Server, time: u32) void {
- // Resizing the grabbed view can be a little bit complicated, because we
- // could be resizing from any corner or edge. This not only resizes the view
- // on one or two axes, but can also move the view if you resize from the top
- // or left edges (or top-left corner).
- //
- // Note that I took some shortcuts here. In a more fleshed-out compositor,
- // you'd wait for the client to prepare a buffer at the new size, then
- // commit any movement that was prepared.
- var view = server.*.grabbed_view;
-
- var dx: f64 = (server.*.cursor.*.x - server.*.grab_x);
- var dy: f64 = (server.*.cursor.*.y - server.*.grab_y);
- var x: f64 = @intToFloat(f64, view.?.*.x);
- var y: f64 = @intToFloat(f64, view.?.*.y);
-
- var width = @intToFloat(f64, server.*.grab_width);
- var height = @intToFloat(f64, server.*.grab_height);
- if (server.*.resize_edges & @intCast(u32, c.WLR_EDGE_TOP) != 0) {
- y = server.*.grab_y + dy;
- height -= dy;
- if (height < 1) {
- y += height;
- }
- } else if (server.*.resize_edges & @intCast(u32, c.WLR_EDGE_BOTTOM) != 0) {
- height += dy;
- }
- if (server.*.resize_edges & @intCast(u32, c.WLR_EDGE_LEFT) != 0) {
- x = server.*.grab_x + dx;
- width -= dx;
- if (width < 1) {
- x += width;
- }
- } else if (server.*.resize_edges & @intCast(u32, c.WLR_EDGE_RIGHT) != 0) {
- width += dx;
- }
- view.?.*.x = @floatToInt(c_int, x);
- view.?.*.y = @floatToInt(c_int, y);
- _ = c.wlr_xdg_toplevel_set_size(view.?.*.xdg_surface, @floatToInt(u32, width), @floatToInt(u32, height));
-}
-
-fn process_cursor_motion(server: *Server, time: u32) void {
- // If the mode is non-passthrough, delegate to those functions.
- if (server.*.cursor_mode == CursorMode.Move) {
- process_cursor_move(server, time);
- return;
- } else if (server.*.cursor_mode == CursorMode.Resize) {
- process_cursor_resize(server, time);
- return;
- }
-
- // Otherwise, find the view under the pointer and send the event along.
- var sx: f64 = undefined;
- var sy: f64 = undefined;
- var seat = server.*.seat;
- var opt_surface: ?*c.wlr_surface = null;
- var view = desktop_view_at(server, server.*.cursor.*.x, server.*.cursor.*.y, &opt_surface, &sx, &sy);
-
- if (view == null) {
- // If there's no view under the cursor, set the cursor image to a
- // default. This is what makes the cursor image appear when you move it
- // around the screen, not over any views.
- c.wlr_xcursor_manager_set_cursor_image(server.*.cursor_mgr, "left_ptr", server.*.cursor);
- }
-
- if (opt_surface) |surface| {
- const focus_changed = seat.*.pointer_state.focused_surface != surface;
- // "Enter" the surface if necessary. This lets the client know that the
- // cursor has entered one of its surfaces.
- //
- // Note that this gives the surface "pointer focus", which is distinct
- // from keyboard focus. You get pointer focus by moving the pointer over
- // a window.
- c.wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
- if (!focus_changed) {
- // The enter event contains coordinates, so we only need to notify
- // on motion if the focus did not change.
- c.wlr_seat_pointer_notify_motion(seat, time, sx, sy);
- }
- } else {
- // Clear pointer focus so future button events and such are not sent to
- // the last client to have the cursor over it.
- c.wlr_seat_pointer_clear_focus(seat);
- }
-}
-
-fn server_cursor_motion(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is forwarded by the cursor when a pointer emits a _relative_
- // pointer motion event (i.e. a delta)
- var server = @fieldParentPtr(Server, "cursor_motion", listener);
- var event = @ptrCast(*c.wlr_event_pointer_motion, @alignCast(@alignOf(*c.wlr_event_pointer_motion), data));
- // The cursor doesn't move unless we tell it to. The cursor automatically
- // handles constraining the motion to the output layout, as well as any
- // special configuration applied for the specific input device which
- // generated the event. You can pass NULL for the device if you want to move
- // the cursor around without any input.
- c.wlr_cursor_move(server.*.cursor, event.*.device, event.*.delta_x, event.*.delta_y);
- process_cursor_motion(server, event.*.time_msec);
-}
-
-fn server_cursor_motion_absolute(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is forwarded by the cursor when a pointer emits an _absolute_
- // motion event, from 0..1 on each axis. This happens, for example, when
- // wlroots is running under a Wayland window rather than KMS+DRM, and you
- // move the mouse over the window. You could enter the window from any edge,
- // so we have to warp the mouse there. There is also some hardware which
- // emits these events.
- var server = @fieldParentPtr(Server, "cursor_motion_absolute", listener);
- var event = @ptrCast(*c.wlr_event_pointer_motion_absolute, @alignCast(@alignOf(*c.wlr_event_pointer_motion_absolute), data));
- c.wlr_cursor_warp_absolute(server.*.cursor, event.*.device, event.*.x, event.*.y);
- process_cursor_motion(server, event.*.time_msec);
-}
-
-fn server_cursor_button(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is forwarded by the cursor when a pointer emits a button
- // event.
- var server = @fieldParentPtr(Server, "cursor_button", listener);
- var event = @ptrCast(*c.wlr_event_pointer_button, @alignCast(@alignOf(*c.wlr_event_pointer_button), data));
- // Notify the client with pointer focus that a button press has occurred
- _ = c.wlr_seat_pointer_notify_button(server.*.seat, event.*.time_msec, event.*.button, event.*.state);
-
- var sx: f64 = undefined;
- var sy: f64 = undefined;
-
- var surface: ?*c.wlr_surface = null;
- var view = desktop_view_at(server, server.*.cursor.*.x, server.*.cursor.*.y, &surface, &sx, &sy);
-
- if (event.*.state == c.enum_wlr_button_state.WLR_BUTTON_RELEASED) {
- // If you released any buttons, we exit interactive move/resize mode.
- server.*.cursor_mode = CursorMode.Passthrough;
- } else {
- // Focus that client if the button was _pressed_
- if (view) |v| {
- focus_view(v, surface.?);
- }
- }
-}
-
-fn server_cursor_axis(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is forwarded by the cursor when a pointer emits an axis event,
- // for example when you move the scroll wheel.
- var server = @fieldParentPtr(Server, "cursor_axis", listener);
- var event = @ptrCast(*c.wlr_event_pointer_axis, @alignCast(@alignOf(*c.wlr_event_pointer_axis), data));
- // Notify the client with pointer focus of the axis event.
- c.wlr_seat_pointer_notify_axis(server.*.seat, event.*.time_msec, event.*.orientation, event.*.delta, event.*.delta_discrete, event.*.source);
-}
-
-fn server_cursor_frame(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
- // This event is forwarded by the cursor when a pointer emits an frame
- // event. Frame events are sent after regular pointer events to group
- // multiple events together. For instance, two axis events may happen at the
- // same time, in which case a frame event won't be sent in between.
- var server = @fieldParentPtr(Server, "cursor_frame", listener);
- // Notify the client with pointer focus of the frame event.
- c.wlr_seat_pointer_notify_frame(server.*.seat);
-}
-
const ZagError = error{
InitError,
CantAddSocket,
@@ -727,32 +15,6 @@ pub fn main() !void {
c.wlr_log_init(c.enum_wlr_log_importance.WLR_DEBUG, null);
var server: Server = undefined;
- // The Wayland display is managed by libwayland. It handles accepting
- // clients from the Unix socket, manging Wayland globals, and so on.
- server.wl_display = c.wl_display_create() orelse return ZagError.InitError;
-
- // The backend is a wlroots feature which abstracts the underlying input and
- // output hardware. The autocreate option will choose the most suitable
- // backend based on the current environment, such as opening an X11 window
- // if an X11 server is running. The NULL argument here optionally allows you
- // to pass in a custom renderer if wlr_renderer doesn't meet your needs. The
- // backend uses the renderer, for example, to fall back to software cursors
- // if the backend does not support hardware cursors (some older GPUs
- // don't).
- server.backend = c.zag_wlr_backend_autocreate(server.wl_display) orelse return ZagError.InitError;
-
- // If we don't provide a renderer, autocreate makes a GLES2 renderer for us.
- // The renderer is responsible for defining the various pixel formats it
- // supports for shared memory, this configures that for clients.
- server.renderer = c.zag_wlr_backend_get_renderer(server.backend);
- c.wlr_renderer_init_wl_display(server.renderer, server.wl_display);
-
- // This creates some hands-off wlroots interfaces. The compositor is
- // necessary for clients to allocate surfaces and the data device manager
- // handles the clipboard. Each of these wlroots interfaces has room for you
- // to dig your fingers in and play with their behavior if you want.
- _ = c.wlr_compositor_create(server.wl_display, server.renderer);
- _ = c.wlr_data_device_manager_create(server.wl_display);
// Creates an output layout, which a wlroots utility for working with an
// arrangement of screens in a physical layout.
@@ -773,54 +35,6 @@ pub fn main() !void {
server.new_xdg_surface.notify = server_new_xdg_surface;
c.wl_signal_add(&server.xdg_shell.*.events.new_surface, &server.new_xdg_surface);
- // Creates a cursor, which is a wlroots utility for tracking the cursor
- // image shown on screen.
- server.cursor = c.wlr_cursor_create();
- c.wlr_cursor_attach_output_layout(server.cursor, server.output_layout);
-
- // Creates an xcursor manager, another wlroots utility which loads up
- // Xcursor themes to source cursor images from and makes sure that cursor
- // images are available at all scale factors on the screen (necessary for
- // HiDPI support). We add a cursor theme at scale factor 1 to begin with.
- server.cursor_mgr = c.wlr_xcursor_manager_create(null, 24);
- _ = c.wlr_xcursor_manager_load(server.cursor_mgr, 1);
-
- // wlr_cursor *only* displays an image on screen. It does not move around
- // when the pointer moves. However, we can attach input devices to it, and
- // it will generate aggregate events for all of them. In these events, we
- // can choose how we want to process them, forwarding them to clients and
- // moving the cursor around. More detail on this process is described in my
- // input handling blog post:
- //
- // https://drewdevault.com/2018/07/17/Input-handling-in-wlroots.html
- //
- // And more comments are sprinkled throughout the notify functions above.
- server.cursor_motion.notify = server_cursor_motion;
- c.wl_signal_add(&server.cursor.*.events.motion, &server.cursor_motion);
-
- server.cursor_motion_absolute.notify = server_cursor_motion_absolute;
- c.wl_signal_add(&server.cursor.*.events.motion_absolute, &server.cursor_motion_absolute);
-
- server.cursor_button.notify = server_cursor_button;
- c.wl_signal_add(&server.cursor.*.events.button, &server.cursor_button);
-
- server.cursor_axis.notify = server_cursor_axis;
- c.wl_signal_add(&server.cursor.*.events.axis, &server.cursor_axis);
-
- server.cursor_frame.notify = server_cursor_frame;
- c.wl_signal_add(&server.cursor.*.events.frame, &server.cursor_frame);
-
- // Configures a seat, which is a single "seat" at which a user sits and
- // operates the computer. This conceptually includes up to one keyboard,
- // pointer, touch, and drawing tablet device. We also rig up a listener to
- // let us know when new input devices are available on the backend.
- c.wl_list_init(&server.keyboards);
- server.new_input.notify = server_new_input;
- c.wl_signal_add(&server.backend.*.events.new_input, &server.new_input);
- server.seat = c.wlr_seat_create(server.wl_display, "seat0");
- server.request_cursor.notify = seat_request_cursor;
- c.wl_signal_add(&server.seat.*.events.request_set_cursor, &server.request_cursor);
-
// Add a Unix socket to the Wayland display.
const socket = c.wl_display_add_socket_auto(server.wl_display);
if (socket == null) {
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