diff options
| -rw-r--r-- | README.md | 15 | ||||
| -rw-r--r-- | backend/libinput/pointer.c | 2 | ||||
| -rw-r--r-- | examples/layer-shell.c | 4 | ||||
| -rw-r--r-- | examples/meson.build | 4 | ||||
| -rw-r--r-- | examples/relative-pointer-unstable-v1.c | 493 | ||||
| -rw-r--r-- | include/rootston/desktop.h | 2 | ||||
| -rw-r--r-- | include/wlr/types/meson.build | 1 | ||||
| -rw-r--r-- | include/wlr/types/wlr_pointer.h | 1 | ||||
| -rw-r--r-- | include/wlr/types/wlr_relative_pointer_v1.h | 77 | ||||
| -rw-r--r-- | protocol/meson.build | 2 | ||||
| -rw-r--r-- | rootston/README.md | 18 | ||||
| -rw-r--r-- | rootston/cursor.c | 17 | ||||
| -rw-r--r-- | rootston/desktop.c | 2 | ||||
| -rw-r--r-- | rootston/output.c | 4 | ||||
| -rw-r--r-- | tinywl/.gitignore | 3 | ||||
| -rw-r--r-- | tinywl/LICENSE | 125 | ||||
| -rw-r--r-- | tinywl/Makefile | 30 | ||||
| -rw-r--r-- | tinywl/README.md | 47 | ||||
| -rw-r--r-- | tinywl/tinywl.c | 929 | ||||
| -rw-r--r-- | types/meson.build | 1 | ||||
| -rw-r--r-- | types/wlr_relative_pointer_v1.c | 275 |
21 files changed, 2035 insertions, 17 deletions
@@ -78,21 +78,6 @@ Install like so: sudo ninja -C build install -## Running the test compositor - -wlroots comes with a test compositor called rootston, which demonstrates the -features of the library and is used as a testbed for the development of the -library. It may also be useful as a reference for understanding how to use -various wlroots features, but it's not considered a production-quality codebase -and is not designed for daily use. - -If you followed the build instructions above the rootston executable can be -found at `./build/rootston/rootston`. To use it, refer to the example config at -[./rootston/rootston.ini.example](https://github.com/swaywm/wlroots/blob/master/rootston/rootston.ini.example) -and place a config file of your own at `rootston.ini` in the working directory -(or in an arbitrary location via `rootston -C`). Other options are available, -refer to `rootston -h`. - ## Contributing See [CONTRIBUTING.md](https://github.com/swaywm/wlroots/blob/master/CONTRIBUTING.md). diff --git a/backend/libinput/pointer.c b/backend/libinput/pointer.c index fb85cddd..b9cf1dfe 100644 --- a/backend/libinput/pointer.c +++ b/backend/libinput/pointer.c @@ -36,6 +36,8 @@ void handle_pointer_motion(struct libinput_event *event, usec_to_msec(libinput_event_pointer_get_time_usec(pevent)); wlr_event.delta_x = libinput_event_pointer_get_dx(pevent); wlr_event.delta_y = libinput_event_pointer_get_dy(pevent); + wlr_event.unaccel_dx = libinput_event_pointer_get_dx_unaccelerated(pevent); + wlr_event.unaccel_dy = libinput_event_pointer_get_dy_unaccelerated(pevent); wlr_signal_emit_safe(&wlr_dev->pointer->events.motion, &wlr_event); } diff --git a/examples/layer-shell.c b/examples/layer-shell.c index 114b98f6..77b2f6c3 100644 --- a/examples/layer-shell.c +++ b/examples/layer-shell.c @@ -87,7 +87,9 @@ static void popup_surface_frame_callback( void *data, struct wl_callback *cb, uint32_t time) { wl_callback_destroy(cb); popup_frame_callback = NULL; - draw_popup(); + if (popup) { + draw_popup(); + } } static struct wl_callback_listener popup_frame_listener = { diff --git a/examples/meson.build b/examples/meson.build index 589a7326..0811d1a2 100644 --- a/examples/meson.build +++ b/examples/meson.build @@ -81,6 +81,10 @@ examples = { 'src': 'pointer-constraints.c', 'dep': [wayland_client, wlr_protos, wlroots], }, + 'relative-pointer': { + 'src': 'relative-pointer-unstable-v1.c', + 'dep': [wayland_client, wlr_protos, wlroots], + }, 'dmabuf-capture': { 'src': 'dmabuf-capture.c', 'dep': [ diff --git a/examples/relative-pointer-unstable-v1.c b/examples/relative-pointer-unstable-v1.c new file mode 100644 index 00000000..ce671f99 --- /dev/null +++ b/examples/relative-pointer-unstable-v1.c @@ -0,0 +1,493 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <GLES2/gl2.h> +#include <linux/input-event-codes.h> +#include <wayland-egl.h> +#include <wlr/render/egl.h> +#include "pointer-constraints-unstable-v1-client-protocol.h" +#include "relative-pointer-unstable-v1-client-protocol.h" +#include "xdg-shell-client-protocol.h" + + +/** + * structs storing global state + * + * These are passed around as user data in the wayland globals. + */ + +struct egl_info { + struct wlr_egl *egl; + struct wl_egl_window *egl_window; + struct wlr_egl_surface *egl_surface; + uint32_t width; + uint32_t height; + struct wl_surface *surface; + struct wl_callback *frame_callback; +}; + +struct window { + struct egl_info *egl_info; + struct wl_pointer *pointer; + struct zwp_locked_pointer_v1 *locked_pointer; + struct zwp_relative_pointer_v1 *relative_pointer; + int32_t pointer_x, pointer_y; + uint32_t last_draw; +}; + + +/** + * surface handling and helpers + * + * draw_cursor and draw_relative_cursor draw a small 5px by 5px box around the + * cursor and relative motion coordinates respectively. draw_background colors + * the background black. + * + * The functions are somewhat duplicated, but it doesn't really matter. + */ + +static void surface_callback_handle_done(void *data, + struct wl_callback *callback, uint32_t time) { + wl_callback_destroy(callback); + struct egl_info *e = data; + e->frame_callback = NULL; +} + +static struct wl_callback_listener surface_callback_listener = { + .done = surface_callback_handle_done, +}; + +static void draw_init(struct egl_info *e) { + eglMakeCurrent(e->egl->display, e->egl_surface, + e->egl_surface, e->egl->context); + glViewport(0, 0, e->width, e->height); +} + +static void draw_cursor(struct egl_info *e, int32_t x, int32_t y) { + glEnable(GL_SCISSOR_TEST); + glScissor(x, e->height - y, 5, 5); + glClearColor(1.0f, 1.0f, 1.0f, 1.0f); /* white */ + glClear(GL_COLOR_BUFFER_BIT); + glDisable(GL_SCISSOR_TEST); +} + +static void draw_relative_cursor(struct egl_info *e, int32_t x, int32_t y) { + glEnable(GL_SCISSOR_TEST); + glScissor(x, e->height - y, 5, 5); + glClearColor(1.0f, 0.0f, 0.0f, 1.0f); /* red */ + glClear(GL_COLOR_BUFFER_BIT); + glDisable(GL_SCISSOR_TEST); +} + +static void draw_background(struct egl_info *e) { + glClearColor(0.0f, 0.0f, 0.0f, 1.0f); /* black */ + glClear(GL_COLOR_BUFFER_BIT); +} + +static void draw_end(struct egl_info *e) { + e->frame_callback = wl_surface_frame(e->surface); + wl_callback_add_listener(e->frame_callback, &surface_callback_listener, e); + + eglSwapBuffers(e->egl->display, e->egl_surface); +} + + +/** + * registry and globals handling + */ + +static struct wl_compositor *compositor = NULL; +static struct wl_seat *seat = NULL; +static struct xdg_wm_base *wm_base = NULL; +static struct zwp_pointer_constraints_v1 *pointer_constraints = NULL; +static struct zwp_relative_pointer_manager_v1 *relative_pointer_manager = NULL; + +static void registry_handle_global(void *data, struct wl_registry *registry, + uint32_t name, const char *interface, uint32_t version) { + if (strcmp(interface, wl_compositor_interface.name) == 0) { + compositor = wl_registry_bind(registry, name, + &wl_compositor_interface, version); + } else if (strcmp(interface, xdg_wm_base_interface.name) == 0) { + wm_base = wl_registry_bind(registry, name, + &xdg_wm_base_interface, version); + } else if (strcmp(interface, wl_seat_interface.name) == 0) { + seat = wl_registry_bind(registry, name, + &wl_seat_interface, version); + } else if (strcmp(interface, zwp_pointer_constraints_v1_interface.name) == 0) { + pointer_constraints = wl_registry_bind(registry, name, + &zwp_pointer_constraints_v1_interface, version); + } else if (strcmp(interface, zwp_relative_pointer_manager_v1_interface.name) == 0) { + relative_pointer_manager = wl_registry_bind(registry, name, + &zwp_relative_pointer_manager_v1_interface, version); + } +} + +static void registry_handle_global_remove(void *data, struct wl_registry *registry, + uint32_t time) { + /* This space intentionally left blank */ +} + +static const struct wl_registry_listener registry_listener = { + .global = registry_handle_global, + .global_remove = registry_handle_global_remove, +}; + + +/** + * xdg_surface handling + */ + +static void xdg_surface_handle_configure(void *data, + struct xdg_surface *xdg_surface, uint32_t serial) { + struct egl_info *e = data; + xdg_surface_ack_configure(xdg_surface, serial); + wl_egl_window_resize(e->egl_window, e->width, e->height, 0, 0); + draw_init(e); + draw_background(e); + draw_end(e); +} + +static const struct xdg_surface_listener xdg_surface_listener = { + .configure = xdg_surface_handle_configure, +}; + + +/** + * xdg_toplevel handling + */ + +static void xdg_toplevel_handle_configure(void *data, + struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height, + struct wl_array *states) { + struct egl_info *e = data; + // TODO: Why do we get 0,0 on initialization here? (in rootston) + if (width == 0 && height == 0) { + return; + } + e->width = width; + e->height = height; +} + +static void xdg_toplevel_handle_close(void *data, + struct xdg_toplevel *xdg_toplevel) { + struct egl_info *e = data; + wlr_egl_finish(e->egl); + exit(EXIT_SUCCESS); +} + +static const struct xdg_toplevel_listener xdg_toplevel_listener = { + .configure = xdg_toplevel_handle_configure, + .close = xdg_toplevel_handle_close, +}; + + +/** + * zwp_locked_pointer handling + * + * Pointer unlocks need to be handled properly since the relative pointer needs + * to be released as well. Unlocks happen when the focus is changed, for + * example. + */ + +static void locked_pointer_handle_locked(void *data, + struct zwp_locked_pointer_v1 *zwp_locked_pointer_v1) { + /* This space intentionally left blank */ +} + +static void locked_pointer_handle_unlocked(void *data, + struct zwp_locked_pointer_v1 *zwp_locked_pointer_v1) { + struct window *w = data; + /* The locked pointer doesn't need to be destroyed since it was oneshot */ + w->locked_pointer = NULL; + if (w->relative_pointer) { + /* Destroy the relative pointer */ + zwp_relative_pointer_v1_destroy(w->relative_pointer); + w->relative_pointer = NULL; + } + draw_init(w->egl_info); + draw_background(w->egl_info); + draw_end(w->egl_info); +} + +static const struct zwp_locked_pointer_v1_listener locked_pointer_listener = { + .locked = locked_pointer_handle_locked, + .unlocked = locked_pointer_handle_unlocked, +}; + + +/** + * zwp_relative_pointer handling + * + * Handling relative_motion events is the meat of the code. The handler simply + * tries to indicate what the deltas look like. + */ + +static void relative_pointer_handle_relative_motion(void *data, + struct zwp_relative_pointer_v1 *zwp_relative_pointer_v1, + uint32_t utime_hi, uint32_t utime_lo, + wl_fixed_t dx, wl_fixed_t dy, + wl_fixed_t dx_unaccel, wl_fixed_t dy_unaccel) { + struct window *w = data; + + /** + * This renders the last location of the pointer (before it as locked), as + * well as what the position would have been after the given relative + * motion. Note that, if the device sends absolute motion events, the + * cursor location after relative motion is always identical to the actual + * cursor position. + */ + uint64_t utime = (((uint64_t) utime_hi << 32) + utime_lo) / 1000; + if (utime - w->last_draw > 30 && w->egl_info->frame_callback == NULL) { + w->last_draw = utime; + + struct egl_info *e = w->egl_info; + draw_init(e); + draw_background(e); + draw_cursor(e, w->pointer_x, w->pointer_y); + draw_relative_cursor(e, w->pointer_x + wl_fixed_to_int(dx), + w->pointer_y + wl_fixed_to_int(dy)); + draw_end(e); + } +} + +static const struct zwp_relative_pointer_v1_listener relative_pointer_listener = { + .relative_motion = relative_pointer_handle_relative_motion, +}; + + +/** + * wl_pointer handling + * + * The client toggles between locking the pointer and receiving relative motion + * events, and releasing the locked pointer and falling back to normal motion + * events, on a mouse button one (left mouse button) click. + * + * It additionally removes the cursor image, and indicates the pointer location + * via a small white box. + */ + +static void pointer_handle_button(void *data, struct wl_pointer *pointer, + uint32_t serial, uint32_t time, uint32_t button, uint32_t state_w) { + + struct window *w = data; + struct egl_info *e = w->egl_info; + + if (button == BTN_LEFT && state_w == WL_POINTER_BUTTON_STATE_PRESSED) { + if (w->locked_pointer == NULL && w->relative_pointer == NULL) { + /* Get a locked pointer and add listener */ + w->locked_pointer = zwp_pointer_constraints_v1_lock_pointer( + pointer_constraints, w->egl_info->surface, w->pointer, NULL, + ZWP_POINTER_CONSTRAINTS_V1_LIFETIME_ONESHOT); + zwp_locked_pointer_v1_add_listener(w->locked_pointer, + &locked_pointer_listener, w); + + /* Get relative pointer and add listener */ + w->relative_pointer = zwp_relative_pointer_manager_v1_get_relative_pointer( + relative_pointer_manager, w->pointer); + zwp_relative_pointer_v1_add_listener(w->relative_pointer, + &relative_pointer_listener, w); + + /* Commit the surface and render */ + wl_surface_commit(e->surface); + + draw_init(e); + draw_background(e); + draw_cursor(e, w->pointer_x, w->pointer_y); + draw_end(e); + } else if (w->locked_pointer && w->relative_pointer) { + /* Destroy the locked pointer */ + zwp_locked_pointer_v1_destroy(w->locked_pointer); + w->locked_pointer = NULL; + + /* Destroy the relative pointer */ + zwp_relative_pointer_v1_destroy(w->relative_pointer); + w->relative_pointer = NULL; + + /* Render */ + draw_init(e); + draw_background(e); + draw_cursor(e, w->pointer_x, w->pointer_y); + draw_end(e); + } else { + fprintf(stderr, "Unknown state!\n"); + exit(EXIT_FAILURE); + } + } +} + +static void pointer_handle_enter(void *data, struct wl_pointer *wl_pointer, + uint32_t serial, struct wl_surface *surface, + wl_fixed_t surface_x, wl_fixed_t surface_y) { + struct window *w = data; + wl_pointer_set_cursor(w->pointer, serial, NULL, 0, 0); +} + +static void pointer_handle_leave(void *data, struct wl_pointer *wl_pointer, + uint32_t serial, struct wl_surface *surface) { + /* This space intentionally left blank */ +} + +static void pointer_handle_motion(void *data, struct wl_pointer *wl_pointer, + uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) { + struct window *w = data; + struct egl_info *e = w->egl_info; + w->pointer_x = wl_fixed_to_int(surface_x); + w->pointer_y = wl_fixed_to_int(surface_y); + if (time - w->last_draw > 30 && e->frame_callback == NULL) { + w->last_draw = time; + draw_init(e); + draw_background(e); + draw_cursor(e, w->pointer_x, w->pointer_y); + draw_end(e); + } +} + +static void pointer_handle_axis(void *data, struct wl_pointer *wl_pointer, + uint32_t time, uint32_t axis, wl_fixed_t value) { + /* This space intentionally left blank */ +} + +static void pointer_handle_frame(void *data, struct wl_pointer *wl_pointer) { + /* This space intentionally left blank */ +} + +static void pointer_handle_axis_source(void *data, + struct wl_pointer *wl_pointer, uint32_t axis_source) { + /* This space intentionally left blank */ +} + +static void pointer_handle_axis_stop(void *data, + struct wl_pointer *wl_pointer, uint32_t time, uint32_t axis) { + /* This space intentionally left blank */ +} + +static void pointer_handle_axis_discrete(void *data, + struct wl_pointer *wl_pointer, uint32_t axis, int32_t discrete) { + /* This space intentionally left blank */ +} + +static const struct wl_pointer_listener pointer_listener = { + .enter = pointer_handle_enter, + .leave = pointer_handle_leave, + .motion = pointer_handle_motion, + .button = pointer_handle_button, + .axis = pointer_handle_axis, + .frame = pointer_handle_frame, + .axis_source = pointer_handle_axis_source, + .axis_stop = pointer_handle_axis_stop, + .axis_discrete = pointer_handle_axis_discrete, +}; + + +/** + * relative-pointer: + * + * This client servers as an example for the relative-pointer-v1 protocol, and + * to some extent the pointer-constraints protocol as well (the locked_pointer + * interface). + * + * The intended behavior is the following. In the default state, the client + * shows a black background, and renders the pointer location as a small white + * box. No cursor is shown. In the locked state, the pointer is locked and the + * client only listens for relative motion events, which are rendered relative + * to the last unlocked pointer location by a small red box. Clicking with the + * left mouse button toggles the state. + * + * Most of the code is standard. The interesting stuff happens in "wl_pointer + * handling" (toggling states), and "zwp_relative_pointer handling" (rendering + * relative motion events). + */ + +int main(int argc, char **argv) { + + /* Connect to the display */ + + struct wl_display *display = wl_display_connect(NULL); + if (display == NULL) { + fprintf(stderr, "Could not connect to a Wayland display\n"); + return EXIT_FAILURE; + } + + /* Get the registry and set listeners */ + + struct wl_registry *registry = wl_display_get_registry(display); + wl_registry_add_listener(registry, ®istry_listener, NULL); + wl_display_dispatch(display); + wl_display_roundtrip(display); + + /* Check that all the global interfaces were captured */ + + if (compositor == NULL) { + fprintf(stderr, "wl_compositor not available\n"); + return EXIT_FAILURE; + } + if (seat == NULL) { + fprintf(stderr, "wl_seat not available\n"); + return EXIT_FAILURE; + } + if (wm_base == NULL) { + fprintf(stderr, "xdg_wm_base not available\n"); + return EXIT_FAILURE; + } + if (pointer_constraints == NULL) { + fprintf(stderr, "zwp_pointer_constraints_v1 not available\n"); + return EXIT_FAILURE; + } + if (relative_pointer_manager == NULL) { + fprintf(stderr, "zwp_relative_pointer_manager_v1 not available\n"); + return EXIT_FAILURE; + } + + /* Initialize EGL context */ + + struct egl_info *e = calloc(1, sizeof(struct egl_info)); + e->egl = calloc(1, sizeof(struct wlr_egl)); + e->width = e->height = 512; + + wlr_egl_init(e->egl, EGL_PLATFORM_WAYLAND_EXT, display, NULL, + WL_SHM_FORMAT_ARGB8888); + + /* Create the surface and xdg_toplevels, and set listeners */ + + struct wl_surface *surface = wl_compositor_create_surface(compositor); + struct xdg_surface *xdg_surface = + xdg_wm_base_get_xdg_surface(wm_base, surface); + struct xdg_toplevel *xdg_toplevel = xdg_surface_get_toplevel(xdg_surface); + + xdg_surface_add_listener(xdg_surface, &xdg_surface_listener, e); + xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, e); + + /* Create the egl window and surface */ + + wl_surface_commit(surface); + + e->egl_window = wl_egl_window_create(surface, e->width, e->height); + e->egl_surface = wlr_egl_create_surface(e->egl, e->egl_window); + e->surface = surface; + + wl_display_roundtrip(display); + + /* Setup global state and render */ + + struct window *w = calloc(1, sizeof(struct window)); + w->egl_info = e; + + draw_init(e); + draw_background(e); + draw_end(e); + + /* Setup the pointer */ + + struct wl_pointer *pointer = wl_seat_get_pointer(seat); + wl_pointer_add_listener(pointer, &pointer_listener, w); + + w->pointer = pointer; + + /* Run display */ + + while (wl_display_dispatch(display) != -1) { + /* This space intentionally left blank */ + } + + return EXIT_SUCCESS; +} diff --git a/include/rootston/desktop.h b/include/rootston/desktop.h index b1fcaca0..56d2a129 100644 --- a/include/rootston/desktop.h +++ b/include/rootston/desktop.h @@ -17,6 +17,7 @@ #include <wlr/types/wlr_output.h> #include <wlr/types/wlr_presentation_time.h> #include <wlr/types/wlr_gtk_primary_selection.h> +#include <wlr/types/wlr_relative_pointer_v1.h> #include <wlr/types/wlr_screencopy_v1.h> #include <wlr/types/wlr_screenshooter.h> #include <wlr/types/wlr_text_input_v3.h> @@ -65,6 +66,7 @@ struct roots_desktop { struct wlr_pointer_constraints_v1 *pointer_constraints; struct wlr_presentation *presentation; struct wlr_foreign_toplevel_manager_v1 *foreign_toplevel_manager_v1; + struct wlr_relative_pointer_manager_v1 *relative_pointer_manager; struct wl_listener new_output; struct wl_listener layout_change; diff --git a/include/wlr/types/meson.build b/include/wlr/types/meson.build index 5e05c5e5..e245dc4e 100644 --- a/include/wlr/types/meson.build +++ b/include/wlr/types/meson.build @@ -28,6 +28,7 @@ install_headers( 'wlr_presentation_time.h', 'wlr_primary_selection.h', 'wlr_region.h', + 'wlr_relative_pointer_v1.h', 'wlr_screencopy_v1.h', 'wlr_screenshooter.h', 'wlr_seat.h', diff --git a/include/wlr/types/wlr_pointer.h b/include/wlr/types/wlr_pointer.h index 7dc643ae..6da4c02a 100644 --- a/include/wlr/types/wlr_pointer.h +++ b/include/wlr/types/wlr_pointer.h @@ -32,6 +32,7 @@ struct wlr_event_pointer_motion { struct wlr_input_device *device; uint32_t time_msec; double delta_x, delta_y; + double unaccel_dx, unaccel_dy; }; struct wlr_event_pointer_motion_absolute { diff --git a/include/wlr/types/wlr_relative_pointer_v1.h b/include/wlr/types/wlr_relative_pointer_v1.h new file mode 100644 index 00000000..076fac56 --- /dev/null +++ b/include/wlr/types/wlr_relative_pointer_v1.h @@ -0,0 +1,77 @@ +/* + * This an unstable interface of wlroots. No guarantees are made regarding the + * future consistency of this API. + */ +#ifndef WLR_USE_UNSTABLE +#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features" +#endif + +#ifndef WLR_TYPES_WLR_RELATIVE_POINTER_V1_H +#define WLR_TYPES_WLR_RELATIVE_POINTER_V1_H + +#include <wayland-server.h> + +/** + * This protocol specifies a set of interfaces used for making clients able to + * receive relative pointer events not obstructed by barriers (such as the + * monitor edge or pointer constraints). + */ + +/** + * A global interface used for getting the relative pointer object for a given + * pointer. + */ +struct wlr_relative_pointer_manager_v1 { + struct wl_global *global; + struct wl_list resources; // wl_resource_get_link() + struct wl_list relative_pointers; // wlr_relative_pointer_v1::link + + struct { + struct wl_signal destroy; + struct wl_signal new_relative_pointer; // wlr_relative_pointer_v1 + } events; + + struct wl_listener display_destroy_listener; + + void *data; +}; + +/** + * A wp_relative_pointer object is an extension to the wl_pointer interface + * used for emitting relative pointer events. It shares the same focus as + * wl_pointer objects of the same seat and will only emit events when it has + * focus. + */ +struct wlr_relative_pointer_v1 { + struct wl_resource *resource; + struct wl_resource *pointer_resource; + struct wlr_seat *seat; + struct wl_list link; // wlr_relative_pointer_manager_v1::relative_pointers + + struct { + struct wl_signal destroy; + } events; + + struct wl_listener seat_destroy; + struct wl_listener pointer_destroy; + + void *data; +}; + +struct wlr_relative_pointer_manager_v1 *wlr_relative_pointer_manager_v1_create( + struct wl_display *display); +void wlr_relative_pointer_manager_v1_destroy( + struct wlr_relative_pointer_manager_v1 *manager); + +/** + * Send a relative motion event to the seat with the same wl_pointer as relative_pointer + */ +void wlr_relative_pointer_manager_v1_send_relative_motion( + struct wlr_relative_pointer_manager_v1 *manager, struct wlr_seat *seat, + uint64_t time_msec, double dx, double dy, + double dx_unaccel, double dy_unaccel); + +struct wlr_relative_pointer_v1 *wlr_relative_pointer_v1_from_resource( + struct wl_resource *resource); + +#endif diff --git a/protocol/meson.build b/protocol/meson.build index afd10fb6..c3af26b8 100644 --- a/protocol/meson.build +++ b/protocol/meson.build @@ -20,6 +20,7 @@ protocols = [ [wl_protocol_dir, 'unstable/xdg-output/xdg-output-unstable-v1.xml'], [wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'], [wl_protocol_dir, 'unstable/pointer-constraints/pointer-constraints-unstable-v1.xml'], + [wl_protocol_dir, 'unstable/relative-pointer/relative-pointer-unstable-v1.xml'], 'gamma-control.xml', 'gtk-primary-selection.xml', 'idle.xml', @@ -43,6 +44,7 @@ client_protocols = [ [wl_protocol_dir, 'unstable/xdg-decoration/xdg-decoration-unstable-v1.xml'], [wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'], [wl_protocol_dir, 'unstable/pointer-constraints/pointer-constraints-unstable-v1.xml'], + [wl_protocol_dir, 'unstable/relative-pointer/relative-pointer-unstable-v1.xml'], 'idle.xml', 'input-method-unstable-v2.xml', 'screenshooter.xml', diff --git a/rootston/README.md b/rootston/README.md new file mode 100644 index 00000000..be2e6698 --- /dev/null +++ b/rootston/README.md @@ -0,0 +1,18 @@ +# rootston + +Rootston is the "big" wlroots test compositor. It implements basically every +feature of wlroots and may be useful as a reference for new compositors. +However, it's mostly used as a testbed for wlroots development and does not have +particularly clean code and is not particularly well designed: proceed with a +grain of salt. It is not designed for end-users. + +## Running rootston + +If you followed the build instructions in `../README.md`, the rootston +executable can be found at `build/rootston/rootston`. To use it, refer to the +example config at [rootston/rootston.ini.example][rootston.ini] and place a +config file of your own at `rootston.ini` in the working directory (or in an +arbitrary location via `rootston -C`). Other options are available, refer to +`rootston -h`. + +[rootston.ini]: https://github.com/swaywm/wlroots/blob/master/rootston/rootston.ini.example diff --git a/rootston/cursor.c b/rootston/cursor.c index b9ded30e..d2d3b510 100644 --- a/rootston/cursor.c +++ b/rootston/cursor.c @@ -35,7 +35,8 @@ void roots_cursor_destroy(struct roots_cursor *cursor) { // TODO } -static void seat_view_deco_motion(struct roots_seat_view *view, double deco_sx, double deco_sy) { +static void seat_view_deco_motion(struct roots_seat_view *view, + double deco_sx, double deco_sy) { struct roots_cursor *cursor = view->seat->cursor; double sx = deco_sx; @@ -310,6 +311,14 @@ void roots_cursor_handle_motion(struct roots_cursor *cursor, double dx = event->delta_x; double dy = event->delta_y; + double dx_unaccel = event->unaccel_dx; + double dy_unaccel = event->unaccel_dy; + + wlr_relative_pointer_manager_v1_send_relative_motion( + cursor->seat->input->server->desktop->relative_pointer_manager, + cursor->seat->seat, (uint64_t)event->time_msec * 1000, dx, dy, + dx_unaccel, dy_unaccel); + if (cursor->active_constraint) { struct roots_view *view = cursor->pointer_view->view; assert(view); @@ -349,6 +358,12 @@ void roots_cursor_handle_motion_absolute(struct roots_cursor *cursor, wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device, event->x, event->y, &lx, &ly); + double dx = lx - cursor->cursor->x; + double dy = ly - cursor->cursor->y; + wlr_relative_pointer_manager_v1_send_relative_motion( + cursor->seat->input->server->desktop->relative_pointer_manager, + cursor->seat->seat, (uint64_t)event->time_msec * 1000, dx, dy, dx, dy); + if (cursor->pointer_view) { struct roots_view *view = cursor->pointer_view->view; diff --git a/rootston/desktop.c b/rootston/desktop.c index 5e9e352a..d65266e5 100644 --- a/rootston/desktop.c +++ b/rootston/desktop.c @@ -1082,6 +1082,8 @@ struct roots_desktop *desktop_create(struct roots_server *server, wlr_presentation_create(server->wl_display, server->backend); desktop->foreign_toplevel_manager_v1 = wlr_foreign_toplevel_manager_v1_create(server->wl_display); + desktop->relative_pointer_manager = + wlr_relative_pointer_manager_v1_create(server->wl_display); wlr_data_control_manager_v1_create(server->wl_display); diff --git a/rootston/output.c b/rootston/output.c index f950d4dc..df8328dd 100644 --- a/rootston/output.c +++ b/rootston/output.c @@ -67,6 +67,10 @@ static void surface_for_each_surface(struct wlr_surface *surface, static void view_for_each_surface(struct roots_view *view, struct layout_data *layout_data, wlr_surface_iterator_func_t iterator, void *user_data) { + if (!view->wlr_surface) { + return; + } + layout_data->x = view->box.x; layout_data->y = view->box.y; layout_data->width = view->wlr_surface->current.width; diff --git a/tinywl/.gitignore b/tinywl/.gitignore new file mode 100644 index 00000000..2b5bb6f8 --- /dev/null +++ b/tinywl/.gitignore @@ -0,0 +1,3 @@ +tinywl +*-protocol.c +*-protocol.h diff --git a/tinywl/LICENSE b/tinywl/LICENSE new file mode 100644 index 00000000..0153f302 --- /dev/null +++ b/tinywl/LICENSE @@ -0,0 +1,125 @@ +This work is licensed under CC0, which effectively puts it in the public domain. + +--- + +Creative Commons Legal Code + +CC0 1.0 Universal + + CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE + LEGAL SERVICES. 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Affirmer understands and acknowledges that Creative Commons is not a + party to this document and has no duty or obligation with respect to + this CC0 or use of the Work. diff --git a/tinywl/Makefile b/tinywl/Makefile new file mode 100644 index 00000000..92d2a516 --- /dev/null +++ b/tinywl/Makefile @@ -0,0 +1,30 @@ +WAYLAND_PROTOCOLS=$(shell pkg-config --variable=pkgdatadir wayland-protocols) +WAYLAND_SCANNER=$(shell pkg-config --variable=wayland_scanner wayland-scanner) +LIBS=\ + $(shell pkg-config --cflags --libs wlroots) \ + $(shell pkg-config --cflags --libs wayland-server) \ + $(shell pkg-config --cflags --libs xkbcommon) + +# wayland-scanner is a tool which generates C headers and rigging for Wayland +# protocols, which are specified in XML. wlroots requires you to rig these up +# to your build system yourself and provide them in the include path. +xdg-shell-protocol.h: + $(WAYLAND_SCANNER) server-header \ + $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@ + +xdg-shell-protocol.c: xdg-shell-protocol.h + $(WAYLAND_SCANNER) private-code \ + $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@ + +tinywl: tinywl.c xdg-shell-protocol.h xdg-shell-protocol.c + $(CC) $(CFLAGS) \ + -g -Werror -I. \ + -DWLR_USE_UNSTABLE \ + $(LIBS) \ + -o $@ $< + +clean: + rm -f tinywl xdg-shell-protocol.h xdg-shell-protocol.c + +.DEFAULT_GOAL=tinywl +.PHONY: clean diff --git a/tinywl/README.md b/tinywl/README.md new file mode 100644 index 00000000..caacc412 --- /dev/null +++ b/tinywl/README.md @@ -0,0 +1,47 @@ +# TinyWL + +This is the "minimum viable product" Wayland compositor based on wlroots. It +aims to implement a Wayland compositor in the fewest lines of code possible, +while still supporting a reasonable set of features. Reading this code is the +best starting point for anyone looking to build their own Wayland compositor +based on wlroots. + +## Building TinyWL + +TinyWL is disconencted from the main wlroots build system, in order to make it +easier to understand the build requirements for your own Wayland compositors. +Simply install the dependencies: + +- wlroots +- wayland-protocols + +And run `make`. + +## Running TinyWL + +You can run TinyWL with `./tinywl`. In an existing Wayland or X11 session, +tinywl will open a Wayland or X11 window respectively to act as a virtual +display. You can then open Wayland windows by setting `WAYLAND_DISPLAY` to the +value shown in the logs. You can also run `./tinywl` from a TTY. + +In either case, you will likely want to specify `-s [cmd]` to run a command at +startup, such as a terminal emulator. This will be necessary to start any new +programs from within the compositor, as TinyWL does not support any custom +keybindings. TinyWL supports the following keybindings: + +- `Alt+Escape`: Terminate the compositor +- `Alt+F1`: Cycle between windows + +## Limitations + +Notable omissions from TinyWL: + +- HiDPI support +- Any kind of configuration, e.g. output layout +- Any protocol other than xdg-shell (e.g. layer-shell, for + panels/taskbars/etc; or Xwayland, for proxied X11 windows) +- Optional protocols, e.g. screen capture, primary selection, virtual + keyboard, etc. Most of these are plug-and-play with wlroots, but they're + omitted for brevity. +- Damage tracking, which tracks which parts of the screen are changing and + minimizes redraws accordingly. diff --git a/tinywl/tinywl.c b/tinywl/tinywl.c new file mode 100644 index 00000000..069f6451 --- /dev/null +++ b/tinywl/tinywl.c @@ -0,0 +1,929 @@ +#define _POSIX_C_SOURCE 200112L +#include <getopt.h> +#include <stdbool.h> +#include <stdlib.h> +#include <stdio.h> +#include <time.h> +#include <unistd.h> +#include <wayland-server.h> +#include <wlr/backend.h> +#include <wlr/render/wlr_renderer.h> +#include <wlr/types/wlr_cursor.h> +#include <wlr/types/wlr_compositor.h> +#include <wlr/types/wlr_data_device.h> +#include <wlr/types/wlr_input_device.h> +#include <wlr/types/wlr_keyboard.h> +#include <wlr/types/wlr_linux_dmabuf_v1.h> +#include <wlr/types/wlr_matrix.h> +#include <wlr/types/wlr_output.h> +#include <wlr/types/wlr_output_layout.h> +#include <wlr/types/wlr_pointer.h> +#include <wlr/types/wlr_seat.h> +#include <wlr/types/wlr_xcursor_manager.h> +#include <wlr/types/wlr_xdg_shell.h> +#include <wlr/util/log.h> +#include <xkbcommon/xkbcommon.h> + +/* For brevity's sake, struct members are annotated where they are used. */ +enum tinywl_cursor_mode { + TINYWL_CURSOR_PASSTHROUGH, + TINYWL_CURSOR_MOVE, + TINYWL_CURSOR_RESIZE, +}; + +struct tinywl_server { + struct wl_display *wl_display; + struct wlr_backend *backend; + struct wlr_renderer *renderer; + + struct wlr_xdg_shell *xdg_shell; + struct wl_listener new_xdg_surface; + struct wl_list views; + + struct wlr_cursor *cursor; + struct wlr_xcursor_manager *cursor_mgr; + struct wl_listener cursor_motion; + struct wl_listener cursor_motion_absolute; + struct wl_listener cursor_button; + struct wl_listener cursor_axis; + + struct wlr_seat *seat; + struct wl_listener new_input; + struct wl_listener request_cursor; + struct wl_list keyboards; + enum tinywl_cursor_mode cursor_mode; + struct tinywl_view *grabbed_view; + double grab_x, grab_y; + int grab_width, grab_height; + uint32_t resize_edges; + + struct wlr_output_layout *output_layout; + struct wl_list outputs; + struct wl_listener new_output; +}; + +struct tinywl_output { + struct wl_list link; + struct tinywl_server *server; + struct wlr_output *wlr_output; + struct wl_listener frame; +}; + +struct tinywl_view { + struct wl_list link; + struct tinywl_server *server; + struct wlr_xdg_surface *xdg_surface; + struct wl_listener map; + struct wl_listener unmap; + struct wl_listener destroy; + struct wl_listener request_move; + struct wl_listener request_resize; + bool mapped; + int x, y; +}; + +struct tinywl_keyboard { + struct wl_list link; + struct tinywl_server *server; + struct wlr_input_device *device; + + struct wl_listener modifiers; + struct wl_listener key; +}; + +struct tinywl_pointer { + struct wl_list link; + struct tinywl_server *server; + struct wlr_input_device *device; +}; + +static void focus_view(struct tinywl_view *view, struct wlr_surface *surface) { + /* Note: this function only deals with keyboard focus. */ + if (view == NULL) { + return; + } + struct tinywl_server *server = view->server; + struct wlr_seat *seat = server->seat; + struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface; + if (prev_surface == surface) { + /* Don't re-focus an already focused surface. */ + return; + } + if (prev_surface) { + /* + * 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. + */ + struct wlr_xdg_surface *previous = wlr_xdg_surface_from_wlr_surface( + seat->keyboard_state.focused_surface); + wlr_xdg_toplevel_set_activated(previous, false); + } + struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat); + /* Move the view to the front */ + wl_list_remove(&view->link); + wl_list_insert(&server->views, &view->link); + /* Activate the new surface */ + wlr_xdg_toplevel_set_activated(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. + */ + wlr_seat_keyboard_notify_enter(seat, view->xdg_surface->surface, + keyboard->keycodes, keyboard->num_keycodes, &keyboard->modifiers); +} + +static void keyboard_handle_modifiers( + struct wl_listener *listener, void *data) { + /* This event is raised when a modifier key, such as shift or alt, is + * pressed. We simply communicate this to the client. */ + struct tinywl_keyboard *keyboard = + wl_container_of(listener, keyboard, modifiers); + /* + * 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. + */ + wlr_seat_set_keyboard(keyboard->server->seat, keyboard->device); + /* Send modifiers to the client. */ + wlr_seat_keyboard_notify_modifiers(keyboard->server->seat, + &keyboard->device->keyboard->modifiers); +} + +static bool handle_keybinding(struct tinywl_server *server, xkb_keysym_t sym) { + /* + * 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 Alt is held down. + */ + switch (sym) { + case XKB_KEY_Escape: + wl_display_terminate(server->wl_display); + break; + case XKB_KEY_F1: + /* Cycle to the next view */ + if (wl_list_length(&server->views) < 2) { + break; + } + struct tinywl_view *current_view = wl_container_of( + server->views.next, current_view, link); + struct tinywl_view *next_view = wl_container_of( + current_view->link.next, next_view, link); + focus_view(next_view, next_view->xdg_surface->surface); + /* Move the previous view to the end of the list */ + wl_list_remove(¤t_view->link); + wl_list_insert(server->views.prev, ¤t_view->link); + break; + default: + return false; + } + return true; +} + +static void keyboard_handle_key( + struct wl_listener *listener, void *data) { + /* This event is raised when a key is pressed or released. */ + struct tinywl_keyboard *keyboard = + wl_container_of(listener, keyboard, key); + struct tinywl_server *server = keyboard->server; + struct wlr_event_keyboard_key *event = data; + struct wlr_seat *seat = server->seat; + + /* Translate libinput keycode -> xkbcommon */ + uint32_t keycode = event->keycode + 8; + /* Get a list of keysyms based on the keymap for this keyboard */ + const xkb_keysym_t *syms; + int nsyms = xkb_state_key_get_syms( + keyboard->device->keyboard->xkb_state, keycode, &syms); + + bool handled = false; + uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard); + if ((modifiers & WLR_MODIFIER_ALT) && event->state == WLR_KEY_PRESSED) { + /* If alt is held down and this button was _pressed_, we attempt to + * process it as a compositor keybinding. */ + for (int i = 0; i < nsyms; i++) { + handled = handle_keybinding(server, syms[i]); + } + } + + if (!handled) { + /* Otherwise, we pass it along to the client. */ + wlr_seat_set_keyboard(seat, keyboard->device); + wlr_seat_keyboard_notify_key(seat, event->time_msec, + event->keycode, event->state); + } +} + +static void server_new_keyboard(struct tinywl_server *server, + struct wlr_input_device *device) { + struct tinywl_keyboard *keyboard = + calloc(1, sizeof(struct tinywl_keyboard)); + 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"). */ + struct xkb_rule_names rules = { 0 }; + struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS); + struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules, + XKB_KEYMAP_COMPILE_NO_FLAGS); + + wlr_keyboard_set_keymap(device->keyboard, keymap); + xkb_keymap_unref(keymap); + xkb_context_unref(context); + wlr_keyboard_set_repeat_info(device->keyboard, 25, 600); + + /* Here we set up listeners for keyboard events. */ + keyboard->modifiers.notify = keyboard_handle_modifiers; + wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers); + keyboard->key.notify = keyboard_handle_key; + wl_signal_add(&device->keyboard->events.key, &keyboard->key); + + wlr_seat_set_keyboard(server->seat, device); + + /* And add the keyboard to our list of keyboards */ + wl_list_insert(&server->keyboards, &keyboard->link); +} + +static void server_new_pointer(struct tinywl_server *server, + struct wlr_input_device *device) { + /* 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. */ + wlr_cursor_attach_input_device(server->cursor, device); +} + +static void server_new_input(struct wl_listener *listener, void *data) { + /* This event is raised by the backend when a new input device becomes + * available. */ + struct tinywl_server *server = + wl_container_of(listener, server, new_input); + struct wlr_input_device *device = data; + switch (device->type) { + case WLR_INPUT_DEVICE_KEYBOARD: + server_new_keyboard(server, device); + break; + case WLR_INPUT_DEVICE_POINTER: + server_new_pointer(server, device); + break; + } + /* 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. */ + uint32_t caps = WL_SEAT_CAPABILITY_POINTER; + if (!wl_list_empty(&server->keyboards)) { + caps |= WL_SEAT_CAPABILITY_KEYBOARD; + } + wlr_seat_set_capabilities(server->seat, caps); +} + +static void seat_request_cursor(struct wl_listener *listener, void *data) { + struct tinywl_server *server = wl_container_of( + listener, server, request_cursor); + /* This event is rasied by the seat when a client provides a cursor image */ + struct wlr_seat_pointer_request_set_cursor_event *event = data; + struct wlr_seat_client *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. */ + wlr_cursor_set_surface(server->cursor, event->surface, + event->hotspot_x, event->hotspot_y); + } +} + +static bool view_at(struct tinywl_view *view, + double lx, double ly, struct wlr_surface **surface, + double *sx, double *sy) { + /* + * 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. + */ + double view_sx = lx - view->x; + double view_sy = ly - view->y; + + struct wlr_surface_state *state = &view->xdg_surface->surface->current; + + double _sx, _sy; + struct wlr_surface *_surface = NULL; + _surface = wlr_xdg_surface_surface_at( + view->xdg_surface, view_sx, view_sy, &_sx, &_sy); + + if (_surface != NULL) { + *sx = _sx; + *sy = _sy; + *surface = _surface; + return true; + } + + return false; +} + +static struct tinywl_view *desktop_view_at( + struct tinywl_server *server, double lx, double ly, + struct wlr_surface **surface, double *sx, double *sy) { + /* 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. */ + struct tinywl_view *view; + wl_list_for_each(view, &server->views, link) { + if (view_at(view, lx, ly, surface, sx, sy)) { + return view; + } + } + return NULL; +} + +static void process_cursor_move(struct tinywl_server *server, uint32_t time) { + /* Move the grabbed view to the new position. */ + server->grabbed_view->x = server->cursor->x - server->grab_x; + server->grabbed_view->y = server->cursor->y - server->grab_y; +} + +static void process_cursor_resize(struct tinywl_server *server, uint32_t time) { + /* + * 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. + */ + struct tinywl_view *view = server->grabbed_view; + double dx = server->cursor->x - server->grab_x; + double dy = server->cursor->y - server->grab_y; + double x = view->x; + double y = view->y; + int width = server->grab_width; + int height = server->grab_height; + if (server->resize_edges & WLR_EDGE_TOP) { + y = server->grab_y + dy; + height -= dy; + if (height < 1) { + y += height; + } + } else if (server->resize_edges & WLR_EDGE_BOTTOM) { + height += dy; + } + if (server->resize_edges & WLR_EDGE_LEFT) { + x = server->grab_x + dx; + width -= dx; + if (width < 1) { + x += width; + } + } else if (server->resize_edges & WLR_EDGE_RIGHT) { + width += dx; + } + view->x = x; + view->y = y; + wlr_xdg_toplevel_set_size(view->xdg_surface, width, height); +} + +static void process_cursor_motion(struct tinywl_server *server, uint32_t time) { + /* If the mode is non-passthrough, delegate to those functions. */ + if (server->cursor_mode == TINYWL_CURSOR_MOVE) { + process_cursor_move(server, time); + return; + } else if (server->cursor_mode == TINYWL_CURSOR_RESIZE) { + process_cursor_resize(server, time); + return; + } + + /* Otherwise, find the view under the pointer and send the event along. */ + double sx, sy; + struct wlr_seat *seat = server->seat; + struct wlr_surface *surface = NULL; + struct tinywl_view *view = desktop_view_at(server, + server->cursor->x, server->cursor->y, &surface, &sx, &sy); + if (!view) { + /* 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. */ + wlr_xcursor_manager_set_cursor_image( + server->cursor_mgr, "left_ptr", server->cursor); + } + if (surface) { + bool 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. + */ + 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. */ + 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. */ + wlr_seat_pointer_clear_focus(seat); + } +} + +static void server_cursor_motion(struct wl_listener *listener, void *data) { + /* This event is forwarded by the cursor when a pointer emits a _relative_ + * pointer motion event (i.e. a delta) */ + struct tinywl_server *server = + wl_container_of(listener, server, cursor_motion); + struct wlr_event_pointer_motion *event = 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. */ + wlr_cursor_move(server->cursor, event->device, + event->delta_x, event->delta_y); + process_cursor_motion(server, event->time_msec); +} + +static void server_cursor_motion_absolute( + struct wl_listener *listener, void *data) { + /* 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. */ + struct tinywl_server *server = + wl_container_of(listener, server, cursor_motion_absolute); + struct wlr_event_pointer_motion_absolute *event = data; + wlr_cursor_warp_absolute(server->cursor, event->device, event->x, event->y); + process_cursor_motion(server, event->time_msec); +} + +static void server_cursor_button(struct wl_listener *listener, void *data) { + /* This event is forwarded by the cursor when a pointer emits a button + * event. */ + struct tinywl_server *server = + wl_container_of(listener, server, cursor_button); + struct wlr_event_pointer_button *event = data; + /* Notify the client with pointer focus that a button press has occured */ + wlr_seat_pointer_notify_button(server->seat, + event->time_msec, event->button, event->state); + double sx, sy; + struct wlr_seat *seat = server->seat; + struct wlr_surface *surface; + struct tinywl_view *view = desktop_view_at(server, + server->cursor->x, server->cursor->y, &surface, &sx, &sy); + if (event->state == WLR_BUTTON_RELEASED) { + /* If you released any buttons, we exit interactive move/resize mode. */ + server->cursor_mode = TINYWL_CURSOR_PASSTHROUGH; + } else { + /* Focus that client if the button was _pressed_ */ + focus_view(view, surface); + } +} + +static void server_cursor_axis(struct wl_listener *listener, void *data) { + /* This event is forwarded by the cursor when a pointer emits an axis event, + * for example when you move the scroll wheel. */ + struct tinywl_server *server = + wl_container_of(listener, server, cursor_axis); + struct wlr_event_pointer_axis *event = data; + /* Notify the client with pointer focus of the axis event. */ + wlr_seat_pointer_notify_axis(server->seat, + event->time_msec, event->orientation, event->delta, + event->delta_discrete, event->source); +} + +/* Used to move all of the data necessary to render a surface from the top-level + * frame handler to the per-surface render function. */ +struct render_data { + struct wlr_output *output; + struct wlr_renderer *renderer; + struct tinywl_view *view; + struct timespec *when; +}; + +static void render_surface(struct wlr_surface *surface, + int sx, int sy, void *data) { + /* This function is called for every surface that needs to be rendered. */ + struct render_data *rdata = data; + struct tinywl_view *view = rdata->view; + struct wlr_output *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. */ + struct wlr_texture *texture = 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). */ + double ox = 0, oy = 0; + wlr_output_layout_output_coords( + view->server->output_layout, output, &ox, &oy); + ox += view->x + sx, oy += 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. */ + struct wlr_box box = { + .x = ox * output->scale, + .y = oy * output->scale, + .width = surface->current.width * output->scale, + .height = 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 coodrinates, 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. + */ + float matrix[9]; + enum wl_output_transform transform = + wlr_output_transform_invert(surface->current.transform); + wlr_matrix_project_box(matrix, &box, transform, 0, + output->transform_matrix); + + /* This takes our matrix, the texture, and an alpha, and performs the actual + * rendering on the GPU. */ + wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1); + + /* This lets the client know that we've displayed that frame and it can + * prepare another one now if it likes. */ + wlr_surface_send_frame_done(surface, rdata->when); +} + +static void output_frame(struct wl_listener *listener, void *data) { + /* This function is called every time an output is ready to display a frame, + * generally at the output's refresh rate (e.g. 60Hz). */ + struct tinywl_output *output = + wl_container_of(listener, output, frame); + struct wlr_renderer *renderer = output->server->renderer; + + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + /* wlr_output_make_current makes the OpenGL context current. */ + if (!wlr_output_make_current(output->wlr_output, NULL)) { + return; + } + /* The "effective" resolution can change if you rotate your outputs. */ + int width, height; + wlr_output_effective_resolution(output->wlr_output, &width, &height); + /* Begin the renderer (calls glViewport and some other GL sanity checks) */ + wlr_renderer_begin(renderer, width, height); + + float color[4] = {0.3, 0.3, 0.3, 1.0}; + 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. */ + struct tinywl_view *view; + wl_list_for_each_reverse(view, &output->server->views, link) { + if (!view->mapped) { + /* An unmapped view should not be rendered. */ + continue; + } + struct render_data rdata = { + .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. */ + wlr_xdg_surface_for_each_surface(view->xdg_surface, + render_surface, &rdata); + } + + /* Conclude rendering and swap the buffers, showing the final frame + * on-screen. */ + wlr_renderer_end(renderer); + wlr_output_swap_buffers(output->wlr_output, NULL, NULL); +} + +static void server_new_output(struct wl_listener *listener, void *data) { + /* This event is rasied by the backend when a new output (aka a display or + * monitor) becomes available. */ + struct tinywl_server *server = + wl_container_of(listener, server, new_output); + struct wlr_output *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 first, a more sophisticated compositor would let the user + * configure it or pick the mode the display advertises as preferred. */ + if (!wl_list_empty(&wlr_output->modes)) { + struct wlr_output_mode *mode = + wl_container_of(wlr_output->modes.prev, mode, link); + wlr_output_set_mode(wlr_output, mode); + } + + /* Allocates and configures our state for this output */ + struct tinywl_output *output = + calloc(1, sizeof(struct tinywl_output)); + output->wlr_output = wlr_output; + output->server = server; + /* Sets up a listener for the frame notify event. */ + output->frame.notify = output_frame; + wl_signal_add(&wlr_output->events.frame, &output->frame); + wl_list_insert(&server->outputs, &output->link); + + /* 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. */ + 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). */ + wlr_output_create_global(wlr_output); +} + +static void xdg_surface_map(struct wl_listener *listener, void *data) { + /* Called when the surface is mapped, or ready to display on-screen. */ + struct tinywl_view *view = wl_container_of(listener, view, map); + view->mapped = true; + focus_view(view, view->xdg_surface->surface); +} + +static void xdg_surface_unmap(struct wl_listener *listener, void *data) { + /* Called when the surface is unmapped, and should no longer be shown. */ + struct tinywl_view *view = wl_container_of(listener, view, unmap); + view->mapped = false; +} + +static void xdg_surface_destroy(struct wl_listener *listener, void *data) { + /* Called when the surface is destroyed and should never be shown again. */ + struct tinywl_view *view = wl_container_of(listener, view, destroy); + wl_list_remove(&view->link); + free(view); +} + +static void begin_interactive(struct tinywl_view *view, + enum tinywl_cursor_mode mode, uint32_t edges) { + /* This function sets up an interactive move or resize operation, where the + * compositor stops propegating pointer events to clients and instead + * consumes them itself, to move or resize windows. */ + struct tinywl_server *server = view->server; + struct wlr_surface *focused_surface = + server->seat->pointer_state.focused_surface; + if (view->xdg_surface->surface != focused_surface) { + /* Deny move/resize requests from unfocused clients. */ + return; + } + server->grabbed_view = view; + server->cursor_mode = mode; + struct wlr_box geo_box; + wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box); + if (mode == TINYWL_CURSOR_MOVE) { + server->grab_x = server->cursor->x - view->x; + server->grab_y = server->cursor->y - view->y; + } else { + server->grab_x = server->cursor->x + geo_box.x; + server->grab_y = server->cursor->y + geo_box.y; + } + server->grab_width = geo_box.width; + server->grab_height = geo_box.height; + server->resize_edges = edges; +} + +static void xdg_toplevel_request_move( + struct wl_listener *listener, void *data) { + /* This event is raised when a client would like to begin an interactive + * move, typically because the user clicked on their client-side + * decorations. Note that a more sophisticated compositor should check the + * provied serial against a list of button press serials sent to this + * client, to prevent the client from requesting this whenver they want. */ + struct tinywl_view *view = wl_container_of(listener, view, request_move); + begin_interactive(view, TINYWL_CURSOR_MOVE, 0); +} + +static void xdg_toplevel_request_resize( + struct wl_listener *listener, void *data) { + /* This event is raised when a client would like to begin an interactive + * resize, typically because the user clicked on their client-side + * decorations. Note that a more sophisticated compositor should check the + * provied serial against a list of button press serials sent to this + * client, to prevent the client from requesting this whenver they want. */ + struct wlr_xdg_toplevel_resize_event *event = data; + struct tinywl_view *view = wl_container_of(listener, view, request_resize); + begin_interactive(view, TINYWL_CURSOR_RESIZE, event->edges); +} + +static void server_new_xdg_surface(struct wl_listener *listener, void *data) { + /* This event is raised when wlr_xdg_shell receives a new xdg surface from a + * client, either a toplevel (application window) or popup. */ + struct tinywl_server *server = + wl_container_of(listener, server, new_xdg_surface); + struct wlr_xdg_surface *xdg_surface = data; + if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) { + return; + } + + /* Allocate a tinywl_view for this surface */ + struct tinywl_view *view = + calloc(1, sizeof(struct tinywl_view)); + view->server = server; + view->xdg_surface = xdg_surface; + + /* Listen to the various events it can emit */ + view->map.notify = xdg_surface_map; + wl_signal_add(&xdg_surface->events.map, &view->map); + view->unmap.notify = xdg_surface_unmap; + wl_signal_add(&xdg_surface->events.unmap, &view->unmap); + view->destroy.notify = xdg_surface_destroy; + wl_signal_add(&xdg_surface->events.destroy, &view->destroy); + + /* cotd */ + struct wlr_xdg_toplevel *toplevel = xdg_surface->toplevel; + view->request_move.notify = xdg_toplevel_request_move; + wl_signal_add(&toplevel->events.request_move, &view->request_move); + view->request_resize.notify = xdg_toplevel_request_resize; + wl_signal_add(&toplevel->events.request_resize, &view->request_resize); + + /* Add it to the list of views. */ + wl_list_insert(&server->views, &view->link); +} + +int main(int argc, char *argv[]) { + wlr_log_init(WLR_DEBUG, NULL); + char *startup_cmd = NULL; + + int c; + while ((c = getopt(argc, argv, "s:h")) != -1) { + switch (c) { + case 's': + startup_cmd = optarg; + break; + default: + printf("Usage: %s [-s startup command]\n", argv[0]); + return 0; + } + } + if (optind < argc) { + printf("Usage: %s [-s startup command]\n", argv[0]); + return 0; + } + + struct tinywl_server server; + /* The Wayland display is managed by libwayland. It handles accepting + * clients from the Unix socket, manging Wayland globals, and so on. */ + server.wl_display = wl_display_create(); + /* 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 = wlr_backend_autocreate(server.wl_display, NULL); + + /* 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 = wlr_backend_get_renderer(server.backend); + 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, dmabuf allows them to use + * opaque GPU handles for buffers to avoid copying pixels on the CPU, 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. */ + wlr_compositor_create(server.wl_display, server.renderer); + wlr_linux_dmabuf_v1_create(server.wl_display, server.renderer); + 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. */ + server.output_layout = wlr_output_layout_create(); + + /* Configure a listener to be notified when new outputs are available on the + * backend. */ + wl_list_init(&server.outputs); + server.new_output.notify = server_new_output; + wl_signal_add(&server.backend->events.new_output, &server.new_output); + + /* Set up our list of views and the xdg-shell. The xdg-shell is a Wayland + * protocol which is used for application windows. For more detail on + * shells, refer to my article: + * + * https://drewdevault.com/2018/07/29/Wayland-shells.html + */ + wl_list_init(&server.views); + server.xdg_shell = wlr_xdg_shell_create(server.wl_display); + server.new_xdg_surface.notify = server_new_xdg_surface; + 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 = wlr_cursor_create(); + 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 = wlr_xcursor_manager_create(NULL, 24); + 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; + wl_signal_add(&server.cursor->events.motion, &server.cursor_motion); + server.cursor_motion_absolute.notify = server_cursor_motion_absolute; + wl_signal_add(&server.cursor->events.motion_absolute, + &server.cursor_motion_absolute); + server.cursor_button.notify = server_cursor_button; + wl_signal_add(&server.cursor->events.button, &server.cursor_button); + server.cursor_axis.notify = server_cursor_axis; + wl_signal_add(&server.cursor->events.axis, &server.cursor_axis); + + /* + * 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. + */ + wl_list_init(&server.keyboards); + server.new_input.notify = server_new_input; + wl_signal_add(&server.backend->events.new_input, &server.new_input); + server.seat = wlr_seat_create(server.wl_display, "seat0"); + server.request_cursor.notify = seat_request_cursor; + wl_signal_add(&server.seat->events.request_set_cursor, + &server.request_cursor); + + /* Add a Unix socket to the Wayland display. */ + const char *socket = wl_display_add_socket_auto(server.wl_display); + if (!socket) { + wlr_backend_destroy(server.backend); + return 1; + } + + /* Start the backend. This will enumerate outputs and inputs, become the DRM + * master, etc */ + if (!wlr_backend_start(server.backend)) { + wlr_backend_destroy(server.backend); + wl_display_destroy(server.wl_display); + return 1; + } + + /* Set the WAYLAND_DISPLAY environment variable to our socket and run the + * startup command if requested. */ + setenv("WAYLAND_DISPLAY", socket, true); + if (startup_cmd) { + if (fork() == 0) { + execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL); + } + } + /* Run the Wayland event loop. This does not return until you exit the + * compositor. Starting the backend rigged up all of the necessary event + * loop configuration to listen to libinput events, DRM events, generate + * frame events at the refresh rate, and so on. */ + wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s", + socket); + wl_display_run(server.wl_display); + + /* Once wl_display_run returns, we shut down the server. */ + wl_display_destroy_clients(server.wl_display); + wl_display_destroy(server.wl_display); + return 0; +} diff --git a/types/meson.build b/types/meson.build index 299ccc9a..c742a8bc 100644 --- a/types/meson.build +++ b/types/meson.build @@ -52,6 +52,7 @@ lib_wlr_types = static_library( 'wlr_primary_selection.c', 'wlr_region.c', 'wlr_screencopy_v1.c', + 'wlr_relative_pointer_v1.c', 'wlr_screenshooter.c', 'wlr_server_decoration.c', 'wlr_surface.c', diff --git a/types/wlr_relative_pointer_v1.c b/types/wlr_relative_pointer_v1.c new file mode 100644 index 00000000..99dea6bf --- /dev/null +++ b/types/wlr_relative_pointer_v1.c @@ -0,0 +1,275 @@ +#include <stdlib.h> +#include <assert.h> +#include <inttypes.h> +#include <wlr/util/log.h> +#include <util/signal.h> +#include <wlr/types/wlr_relative_pointer_v1.h> +#include <wlr/types/wlr_seat.h> +#include "wayland-util.h" +#include "wayland-server.h" +#include "relative-pointer-unstable-v1-protocol.h" + +#define RELATIVE_POINTER_MANAGER_VERSION 1 + +static const struct zwp_relative_pointer_manager_v1_interface relative_pointer_manager_v1_impl; +static const struct zwp_relative_pointer_v1_interface relative_pointer_v1_impl; + + +/** + * helper functions + */ + +struct wlr_relative_pointer_v1 *wlr_relative_pointer_v1_from_resource(struct wl_resource *resource) { + assert(wl_resource_instance_of(resource, &zwp_relative_pointer_v1_interface, + &relative_pointer_v1_impl)); + return wl_resource_get_user_data(resource); +} + + +static struct wlr_relative_pointer_manager_v1 *relative_pointer_manager_from_resource(struct wl_resource *resource) { + assert(wl_resource_instance_of(resource, &zwp_relative_pointer_manager_v1_interface, + &relative_pointer_manager_v1_impl)); + return wl_resource_get_user_data(resource); +} + + +/** + * relative_pointer handler functions + */ + +static void relative_pointer_destroy(struct wlr_relative_pointer_v1 *relative_pointer) { + wlr_signal_emit_safe(&relative_pointer->events.destroy, relative_pointer); + + wl_list_remove(&relative_pointer->link); + wl_list_remove(&relative_pointer->seat_destroy.link); + + wl_resource_set_user_data(relative_pointer->resource, NULL); + free(relative_pointer); +} + +static void relative_pointer_v1_handle_resource_destroy(struct wl_resource *resource) { + struct wlr_relative_pointer_v1 *relative_pointer = + wlr_relative_pointer_v1_from_resource(resource); + if (relative_pointer == NULL) { + return; + } + relative_pointer_destroy(relative_pointer); +} + + +static void relative_pointer_v1_handle_destroy(struct wl_client *client, + struct wl_resource *resource) { + struct wlr_relative_pointer_v1 *relative_pointer = + wlr_relative_pointer_v1_from_resource(resource); + wlr_log(WLR_DEBUG, "relative_pointer_v1 %p released by client %p", + relative_pointer, client); + + wl_resource_destroy(resource); +} + +static void relative_pointer_handle_seat_destroy(struct wl_listener *listener, + void *data) { + struct wlr_relative_pointer_v1 *relative_pointer = + wl_container_of(listener, relative_pointer, seat_destroy); + + relative_pointer_destroy(relative_pointer); +} + +static void relative_pointer_handle_pointer_destroy(struct wl_listener *listener, + void *data) { + struct wlr_relative_pointer_v1 *relative_pointer = + wl_container_of(listener, relative_pointer, pointer_destroy); + + relative_pointer_destroy(relative_pointer); +} + +/** + * relative_pointer_manager handler functions + */ + +static void relative_pointer_manager_v1_handle_resource_destroy(struct wl_resource *resource) { + wl_list_remove(wl_resource_get_link(resource)); +} + + +static void relative_pointer_manager_v1_handle_destroy(struct wl_client *client, + struct wl_resource *resource) { + wl_resource_destroy(resource); + + wlr_log(WLR_DEBUG, "relative_pointer_v1 manager unbound from client %p", + client); +} + +static void relative_pointer_manager_v1_handle_get_relative_pointer(struct wl_client *client, + struct wl_resource *resource, uint32_t id, struct wl_resource *pointer) { + struct wlr_seat_client *seat_client = + wlr_seat_client_from_pointer_resource(pointer); + + struct wlr_relative_pointer_v1 *relative_pointer = + calloc(1, sizeof(struct wlr_relative_pointer_v1)); + if (relative_pointer == NULL) { + wl_client_post_no_memory(client); + return; + } + + struct wl_resource *relative_pointer_resource = wl_resource_create(client, + &zwp_relative_pointer_v1_interface, wl_resource_get_version(resource), id); + if (relative_pointer_resource == NULL) { + free(relative_pointer); + wl_client_post_no_memory(client); + return; + } + + relative_pointer->resource = relative_pointer_resource; + relative_pointer->seat = seat_client->seat; + relative_pointer->pointer_resource = pointer; + + wl_signal_init(&relative_pointer->events.destroy); + + wl_resource_set_implementation(relative_pointer_resource, &relative_pointer_v1_impl, + relative_pointer, relative_pointer_v1_handle_resource_destroy); + + struct wlr_relative_pointer_manager_v1 *manager = + relative_pointer_manager_from_resource(resource); + + wl_list_insert(&manager->relative_pointers, + &relative_pointer->link); + + wl_signal_add(&relative_pointer->seat->events.destroy, + &relative_pointer->seat_destroy); + relative_pointer->seat_destroy.notify = relative_pointer_handle_seat_destroy; + + wl_resource_add_destroy_listener(relative_pointer->pointer_resource, + &relative_pointer->pointer_destroy); + relative_pointer->pointer_destroy.notify = relative_pointer_handle_pointer_destroy; + + wlr_signal_emit_safe(&manager->events.new_relative_pointer, + relative_pointer); + + wlr_log(WLR_DEBUG, "relative_pointer_v1 %p created for client %p", + relative_pointer, client); +} + + +static void relative_pointer_manager_v1_bind(struct wl_client *wl_client, void *data, + uint32_t version, uint32_t id) { + struct wlr_relative_pointer_manager_v1 *manager = data; + + struct wl_resource *manager_resource = wl_resource_create(wl_client, + &zwp_relative_pointer_manager_v1_interface, version, id); + + if (manager_resource == NULL) { + wl_client_post_no_memory(wl_client); + return; + } + + wl_list_insert(&manager->resources, wl_resource_get_link(manager_resource)); + + wl_resource_set_implementation(manager_resource, &relative_pointer_manager_v1_impl, + manager, relative_pointer_manager_v1_handle_resource_destroy); + + wlr_log(WLR_DEBUG, "relative_pointer_v1 manager bound to client %p", + wl_client); +} + +static void handle_display_destroy(struct wl_listener *listener, void *data) { + struct wlr_relative_pointer_manager_v1 *manager = + wl_container_of(listener, manager, display_destroy_listener); + wlr_relative_pointer_manager_v1_destroy(manager); +} + + +/** + * Implementations + */ + +static const struct zwp_relative_pointer_manager_v1_interface relative_pointer_manager_v1_impl = { + .destroy = relative_pointer_manager_v1_handle_destroy, + .get_relative_pointer = relative_pointer_manager_v1_handle_get_relative_pointer, +}; + + +static const struct zwp_relative_pointer_v1_interface relative_pointer_v1_impl = { + .destroy = relative_pointer_v1_handle_destroy, +}; + + +/** + * Public functions + */ + +struct wlr_relative_pointer_manager_v1 *wlr_relative_pointer_manager_v1_create(struct wl_display *display) { + struct wlr_relative_pointer_manager_v1 *manager = + calloc(1, sizeof(struct wlr_relative_pointer_manager_v1)); + + if (manager == NULL) { + return NULL; + } + + wl_list_init(&manager->resources); + wl_list_init(&manager->relative_pointers); + + manager->global = wl_global_create(display, + &zwp_relative_pointer_manager_v1_interface, RELATIVE_POINTER_MANAGER_VERSION, + manager, relative_pointer_manager_v1_bind); + + if (manager->global == NULL) { + free(manager); + return NULL; + } + + wl_signal_init(&manager->events.destroy); + wl_signal_init(&manager->events.new_relative_pointer); + + manager->display_destroy_listener.notify = handle_display_destroy; + wl_display_add_destroy_listener(display, &manager->display_destroy_listener); + + wlr_log(WLR_DEBUG, "relative_pointer_v1 manager created"); + + return manager; +} + + +void wlr_relative_pointer_manager_v1_destroy(struct wlr_relative_pointer_manager_v1 *manager) { + if (manager == NULL) { + return; + } + + wlr_signal_emit_safe(&manager->events.destroy, manager); + wl_list_remove(&manager->display_destroy_listener.link); + + struct wl_resource *resource; + struct wl_resource *tmp_resource; + wl_resource_for_each_safe(resource, tmp_resource, &manager->resources) { + wl_resource_destroy(resource); + } + + wl_global_destroy(manager->global); + free(manager); +} + + +void wlr_relative_pointer_manager_v1_send_relative_motion( + struct wlr_relative_pointer_manager_v1 *manager, struct wlr_seat *seat, + uint64_t time_msec, double dx, double dy, + double dx_unaccel, double dy_unaccel) { + struct wlr_seat_client *focused = seat->pointer_state.focused_client; + if (focused == NULL) { + return; + } + + struct wlr_relative_pointer_v1 *pointer; + wl_list_for_each(pointer, &manager->relative_pointers, link) { + struct wlr_seat_client *seat_client = + wlr_seat_client_from_pointer_resource(pointer->pointer_resource); + if (seat != pointer->seat || focused != seat_client) { + continue; + } + + zwp_relative_pointer_v1_send_relative_motion(pointer->resource, + (uint32_t)(time_msec >> 32), (uint32_t)time_msec, + wl_fixed_from_double(dx), wl_fixed_from_double(dy), + wl_fixed_from_double(dx_unaccel), wl_fixed_from_double(dy_unaccel)); + wl_pointer_send_frame(pointer->pointer_resource); + } +} |