From 0f70a57703305c529d0cc786244fdc24a352227d Mon Sep 17 00:00:00 2001 From: Leon Henrik Plickat Date: Sun, 13 Aug 2023 01:37:13 +0200 Subject: [PATCH] init --- Makefile | 35 + neko-bitmap.xbm | 345 +++++++++ wayneko.c | 921 +++++++++++++++++++++++ wlr-layer-shell-unstable-v1.xml | 285 +++++++ xdg-shell.xml | 1249 +++++++++++++++++++++++++++++++ 5 files changed, 2835 insertions(+) create mode 100644 Makefile create mode 100644 neko-bitmap.xbm create mode 100644 wayneko.c create mode 100644 wlr-layer-shell-unstable-v1.xml create mode 100644 xdg-shell.xml diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..e9758ee --- /dev/null +++ b/Makefile @@ -0,0 +1,35 @@ +SCANNER := wayland-scanner + +PREFIX=/usr/local +BINDIR=$(PREFIX)/bin +MANDIR=$(PREFIX)/share/man + +CFLAGS=-Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter -Wconversion -Wformat-security -Wformat -Wsign-conversion -Wfloat-conversion -Wunused-result $(shell pkg-config --cflags pixman-1) +LIBS=-lwayland-client $(shell pkg-config --libs pixman-1) -lrt +OBJ=wayneko.o wlr-layer-shell-unstable-v1.o xdg-shell.o +GEN=wlr-layer-shell-unstable-v1.c wlr-layer-shell-unstable-v1.h xdg-shell.c xdg-shell.h + +wayneko: $(OBJ) + $(CC) $(LDFLAGS) -o $@ $(OBJ) $(LIBS) + +$(OBJ): $(GEN) + +%.c: %.xml + $(SCANNER) private-code < $< > $@ + +%.h: %.xml + $(SCANNER) client-header < $< > $@ + +install: wayneko + install -D wayneko $(DESTDIR)$(BINDIR)/wayneko + install -m 644 -D wayneko.1 $(DESTDIR)$(MANDIR)/man1/wayneko.1 + +uninstall: + $(RM) $(DESTDIR)$(BINDIR)/wayneko + $(RM) $(DESTDIR)$(MANDIR)/man1/wayneko.1 + +clean: + $(RM) wayneko $(GEN) $(OBJ) + +.PHONY: clean install + diff --git a/neko-bitmap.xbm b/neko-bitmap.xbm new file mode 100644 index 0000000..1a1a3f0 --- /dev/null +++ b/neko-bitmap.xbm @@ -0,0 +1,345 @@ +#define neko_bitmap_width 512 +#define neko_bitmap_height 64 +static unsigned char neko_bitmap_bits[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 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0x00, 0xf8, 0xff, 0x0f, + 0x00, 0xf8, 0xff, 0x0f, 0xff, 0xff, 0xff, 0x07, 0x80, 0xff, 0xff, 0x3f, + 0xe0, 0xff, 0xff, 0xff, 0xfc, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xc0, 0xff, 0xff, 0x3f, 0xc0, 0xff, 0xff, 0x3f, 0x00, 0xfb, 0xbf, 0x01, + 0x00, 0xfb, 0xff, 0x01, 0x00, 0xfb, 0xbf, 0x01, 0x00, 0xfb, 0xbf, 0x01, + 0x00, 0xfb, 0xff, 0x0f, 0x00, 0xfb, 0xff, 0x0f, 0xff, 0xf9, 0xff, 0x0f, + 0xc0, 0xff, 0x7f, 0x1f, 0xf0, 0xff, 0x87, 0xff, 0xf8, 0xfe, 0xff, 0x03, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0xff, 0x3f, 0xc0, 0xff, 0xff, 0x3f, + 0x80, 0xff, 0xff, 0x03, 0x80, 0xff, 0xff, 0x03, 0x80, 0xff, 0xff, 0x03, + 0x80, 0xff, 0xff, 0x03, 0x80, 0xff, 0xff, 0x0f, 0x80, 0xff, 0xff, 0x0f, + 0x1f, 0x00, 0xfc, 0x1f, 0xc0, 0xff, 0x3f, 0x00, 0xf8, 0x3f, 0x00, 0xf8, + 0x00, 0xfc, 0xff, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0xff, 0x7f, + 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x07, + 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x07, + 0xc0, 0xff, 0xff, 0x07, 0x0c, 0x00, 0xe0, 0x3f, 0xc0, 0xfc, 0x1f, 0x00, + 0xfc, 0x07, 0x00, 0x30, 0x00, 0xf8, 0x3f, 0x03, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x07, + 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x3f, 0xc0, 0xff, 0xff, 0x07, + 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x03, 0x00, 0x00, 0xc0, 0x1c, + 0x00, 0x1c, 0x0f, 0x00, 0x38, 0x03, 0x00, 0x00, 0x00, 0xf0, 0x38, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x7f, + 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x07, 0xc0, 0xff, 0xff, 0x7f, + 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x7f, 0xc0, 0xff, 0xff, 0x7f, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0xe0, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0x7f, + 0x80, 0xff, 0xff, 0x7f, 0xe0, 0xff, 0xff, 0xff, 0xe0, 0xff, 0xff, 0x0f, + 0xe0, 0xff, 0xff, 0x3f, 0xe0, 0xff, 0xff, 0xff, 0xe0, 0xff, 0xff, 0xff, + 0xe0, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0xff, 0xff, 0x7f, 0x00, 0xff, 0xff, 0x7f, 0xe0, 0xff, 0xfe, 0x7f, + 0xe0, 0xff, 0xfe, 0x0f, 0xe0, 0xff, 0xfe, 0x0f, 0xe0, 0xff, 0xfe, 0x7f, + 0xe0, 0xff, 0xfe, 0x7f, 0xe0, 0xff, 0xfe, 0x7f, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x9f, 0x3f, 0x00, 0xe0, 0x9f, 0x3f, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 }; diff --git a/wayneko.c b/wayneko.c new file mode 100644 index 0000000..6867581 --- /dev/null +++ b/wayneko.c @@ -0,0 +1,921 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef __linux__ +#include +#ifdef __GLIBC__ +#include +#endif +#endif + +#include "wlr-layer-shell-unstable-v1.h" + +/* Note: Atlas width must be divisable by 4. */ +#include "neko-bitmap.xbm" +const int neko_bitmap_stride = neko_bitmap_width / 8; +const int neko_size = 32; +pixman_image_t *neko_atlas = NULL; +pixman_image_t *neko_atlas_bg_fill = NULL; +pixman_image_t *neko_atlas_border_fill = NULL; + +enum Neko +{ + NEKO_SLEEP_1 = 0, + NEKO_SLEEP_2, + NEKO_YAWN, + NEKO_SHOCK, + NEKO_THINK, + NEKO_STARE, + NEKO_SCRATCH_1, + NEKO_SCRATCH_2, + NEKO_RUN_RIGHT_1, + NEKO_RUN_RIGHT_2, + NEKO_RUN_LEFT_1, + NEKO_RUN_LEFT_2, +}; + +const uint16_t animation_timeout = 200; +size_t animation_ticks_until_next_frame = 10; +enum Neko current_neko = NEKO_STARE; + +struct Buffer +{ + struct wl_list link; + + uint32_t width; + uint32_t height; + uint32_t stride; + size_t size; + void *mmap; + struct wl_buffer *wl_buffer; + pixman_image_t *pixman_image; + bool busy; +}; + +struct Surface +{ + struct wl_surface *wl_surface; + struct zwlr_layer_surface_v1 *layer_surface; + bool configured; +}; + +struct Surface surface = { 0 }; + +const uint32_t surface_width = 100; +const uint32_t surface_height = neko_size; + +int ret = EXIT_SUCCESS; +bool loop = true; +struct wl_display *wl_display = NULL; +struct wl_registry *wl_registry = NULL; +struct wl_callback *sync_callback = NULL; +struct wl_compositor *wl_compositor = NULL; +struct wl_shm *wl_shm = NULL; +struct zwlr_layer_shell_v1 *layer_shell = NULL; +struct timespec last_tick; + +/* The amount of buffers per surface we consider the reasonable upper limit. + * Some compositors sometimes tripple-buffer, so three seems to be ok. + * Note that we can absolutely work with higher buffer numbers if needed, + * however we consider that to be an anomaly and therefore do not want to + * keep all those extra buffers around if we can avoid it, as to not have + * unecessary memory overhead. + */ +int max_buffer_multiplicity = 3; + +struct wl_list buffer_pool; + +/* No-Op function plugged into Wayland listeners we don't care about. */ +static void noop () {} + +/************* + * * + * Signals * + * * + *************/ +/** + * Intercept error signals (like SIGSEGV and SIGFPE) so that we can try to + * print a fancy error message and a backtracke before letting the system kill us. + */ +static void handle_error (int signum) +{ + const char *msg = + "\n" + "🐈 🐈 🐈\n" + "β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”\n" + "β”‚ β”‚\n" + "β”‚ wayneko has crashed. β”‚\n" + "β”‚ β”‚\n" + "β”‚ This is likely a bug, so please β”‚\n" + "β”‚ report this to the mailing list. β”‚\n" + "β”‚ β”‚\n" + "β”‚ ~leon_plickat/public-inbox@lists.sr.ht β”‚\n" + "β”‚ β”‚\n" + "β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜\n" + "\n"; + fputs(msg, stderr); + + /* Set up the default handlers to deal with the rest. We do this before + * attempting to get a backtrace, because sometimes that could also + * cause a SEGFAULT and we don't want a funny signal loop to happen. + */ + signal(signum, SIG_DFL); + +#ifdef __linux__ +#ifdef __GLIBC__ + fputs("Attempting to get backtrace:\n", stderr); + + void *buffer[255]; + const int calls = backtrace(buffer, sizeof(buffer) / sizeof(void *)); + backtrace_symbols_fd(buffer, calls, fileno(stderr)); + fputs("\n", stderr); +#endif +#endif + + /* Easiest way of calling the default signal handler. */ + kill(getpid(), signum); +} + +/** + * Intercept soft kills (like SIGINT and SIGTERM) so we can attempt to clean up + * and exit gracefully. + */ +static void handle_term (int signum) +{ + fputs("[wayneko] Terminated by signal.\n", stderr); + + /* If cleanup fails or hangs and causes this signal to be recieved again, + * let the default signal handler kill us. + */ + signal(signum, SIG_DFL); + + loop = false; +} + +/** + * Set up signal handlers. + */ +static void init_signals (void) +{ + signal(SIGSEGV, handle_error); + signal(SIGFPE, handle_error); + + signal(SIGINT, handle_term); + signal(SIGTERM, handle_term); +} + +/************ + * * + * Buffer * + * * + ************/ +static void buffer_randomize_string (char *str, size_t len) +{ + struct timespec ts; + clock_gettime(CLOCK_REALTIME, &ts); + long r = ts.tv_nsec; + + for (size_t i = 0; i < len; i++, str++) + { + /* Use two byte from the current nano-second to pseudo-randomly + * increase the ASCII character 'A' into another character, + * which will then subsitute the character at *str. + */ + *str = (char)('A' + (r&15) + (r&16)); + r >>= 5; + } +} + +/* Tries to create a shared memory object and returns its file descriptor if + * successful. + */ +static bool buffer_get_shm_fd (int *fd, size_t size) +{ + char name[] = "/wayneko-RANDOM"; + char *rp = name + strlen("/wayneko-"); /* Pointer to random part. */ + size_t rl = strlen("RANDOM"); /* Length of random part. */ + + /* Try a few times to get a unique name. */ + for (int tries = 100; tries > 0; tries--) + { + /* Make the name pseudo-random to not conflict with other + * running instances. + */ + buffer_randomize_string(rp, rl); + + /* Try to create a shared memory object. Returns -1 if the + * memory object already exists. + */ + *fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600); + + /* If a shared memory object was created, set its size and + * return its file descriptor. + */ + if ( *fd >= 0 ) + { + shm_unlink(name); + if ( ftruncate(*fd, (off_t)size) < 0 ) + { + fprintf(stderr, "ERROR: ftruncate: %s.\n", strerror(errno)); + close(*fd); + return false; + } + return true; + } + + /* The EEXIST error means that the name is not unique and we + * must try again. + */ + if ( errno != EEXIST ) + { + fprintf(stderr, "ERROR: shm_open: %s.\n", strerror(errno)); + return false; + } + } + + return false; +} + +static void buffer_handle_release (void *data, struct wl_buffer *wl_buffer) +{ + struct Buffer *buffer = (struct Buffer *)data; + buffer->busy = false; +} + +static const struct wl_buffer_listener buffer_listener = { + .release = buffer_handle_release, +}; + +static void buffer_finish (struct Buffer *buffer) +{ + if ( buffer->wl_buffer != NULL ) + wl_buffer_destroy(buffer->wl_buffer); + if ( buffer->pixman_image != NULL ) + pixman_image_unref(buffer->pixman_image); + if ( buffer->mmap != NULL ) + munmap(buffer->mmap, buffer->size); +} + +static void buffer_destroy (struct Buffer *buffer) +{ + wl_list_remove(&buffer->link); + free(buffer); +} + +#define PIXMAN_STRIDE(A, B) (((PIXMAN_FORMAT_BPP(A) * B + 7) / 8 + 4 - 1) & -4) +static bool buffer_init (struct Buffer *buffer, uint32_t width, uint32_t height) +{ + assert(!buffer->busy); + + bool ret = true; + int fd = -1; + struct wl_shm_pool *shm_pool = NULL; + + buffer->width = width; + buffer->height = height; + buffer->stride = (uint32_t)PIXMAN_STRIDE(PIXMAN_a8r8g8b8, (int32_t)width); + buffer->size = (size_t)(buffer->stride * height); + + if ( buffer->size == 0 ) + { + ret = false; + goto cleanup; + } + + if (! buffer_get_shm_fd(&fd, buffer->size)) + { + ret = false; + goto cleanup; + } + + buffer->mmap = mmap(NULL, buffer->size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if ( buffer->mmap == MAP_FAILED ) + { + fprintf(stderr, "ERROR: mmap: %s.\n", strerror(errno)); + ret = false; + goto cleanup; + } + + shm_pool = wl_shm_create_pool(wl_shm, fd, (int32_t)buffer->size); + if ( shm_pool == NULL ) + { + ret = false; + goto cleanup; + } + + buffer->wl_buffer = wl_shm_pool_create_buffer(shm_pool, 0, (int32_t)width, + (int32_t)height, (int32_t)buffer->stride, WL_SHM_FORMAT_ARGB8888); + if ( buffer->wl_buffer == NULL ) + { + ret = false; + goto cleanup; + } + wl_buffer_add_listener(buffer->wl_buffer, &buffer_listener, buffer); + + buffer->pixman_image = pixman_image_create_bits_no_clear(PIXMAN_a8r8g8b8, + (int32_t)width, (int32_t)height, buffer->mmap, (int32_t)buffer->stride); + if ( buffer->pixman_image == NULL ) + { + ret = false; + goto cleanup; + } + +cleanup: + if ( shm_pool != NULL ) + wl_shm_pool_destroy(shm_pool); + if ( fd != -1 ) + close(fd); + if (! ret) + buffer_finish(buffer); + + return ret; +} +#undef PIXMAN_STRIDE + +static struct Buffer *buffer_pool_find_suitable_buffer (uint32_t width, uint32_t height) +{ + struct Buffer *first_unbusy_buffer = NULL; + struct Buffer *current = NULL; + wl_list_for_each(current, &buffer_pool, link) + { + if (current->busy) + continue; + first_unbusy_buffer = current; + if ( current->width != width ) + continue; + if ( current->height != height ) + continue; + return current; + } + + /* No buffer has matching dimensions, however we do have an unbusy + * buffer which we can just re-init. + */ + if ( first_unbusy_buffer != NULL ) + { + buffer_finish(first_unbusy_buffer); + if (!buffer_init(first_unbusy_buffer, width, height)) + { + buffer_destroy(first_unbusy_buffer); + return NULL; + } + return first_unbusy_buffer; + } + + return NULL; +} + +static struct Buffer *buffer_pool_new_buffer (uint32_t width, uint32_t height) +{ + struct Buffer *buffer = calloc(1, sizeof(struct Buffer)); + if ( buffer == NULL ) + { + fprintf(stderr, "ERROR: calloc(): %s\n", strerror(errno)); + return NULL; + } + + memset(buffer, 0, sizeof(struct Buffer)); + wl_list_insert(&buffer_pool, &buffer->link); + if (!buffer_init(buffer, width, height)) + { + buffer_destroy(buffer); + return NULL; + } + + return buffer; +} + +/** + * Get a buffer of the specified dimenisons. If possible an idle buffer is + * reused, otherweise a new one is created. + */ +static struct Buffer *buffer_pool_next_buffer (uint32_t width, uint32_t height) +{ + struct Buffer *ret = buffer_pool_find_suitable_buffer(width, height); + if ( ret == NULL ) + ret = buffer_pool_new_buffer(width, height); + + // XXX cull buffers + + return ret; +} + +static void buffer_pool_destroy_all_buffers (void) +{ + struct Buffer *buffer, *tmp; + wl_list_for_each_safe(buffer, tmp, &buffer_pool, link) + { + buffer_finish(buffer); + buffer_destroy(buffer); + } +} +/*********** + * * + * Atlas * + * * + ***********/ +static bool colour_from_hex (pixman_color_t *colour, const char *hex) +{ + uint16_t r = 0, g = 0, b = 0, a = 255; + + if ( 4 != sscanf(hex, "0x%02hx%02hx%02hx%02hx", &r, &g, &b, &a) + && 3 != sscanf(hex, "0x%02hx%02hx%02hx", &r, &g, &b) ) + { + fprintf(stderr, "ERROR: Invalid colour: %s\n", hex); + return false; + } + + colour->alpha = (uint16_t)(((double)a / 255.0) * 65535.0); + colour->red = (uint16_t)((((double)r / 255.0) * 65535.0) * colour->alpha / 0xffff); + colour->green = (uint16_t)((((double)g / 255.0) * 65535.0) * colour->alpha / 0xffff); + colour->blue = (uint16_t)((((double)b / 255.0) * 65535.0) * colour->alpha / 0xffff); + + return true; +} + +static void atlas_deinit (void) +{ + if ( neko_atlas != NULL ) + { + pixman_image_unref(neko_atlas); + neko_atlas = NULL; + } + if ( neko_atlas_bg_fill != NULL ) + { + pixman_image_unref(neko_atlas_bg_fill); + neko_atlas_bg_fill = NULL; + } + if ( neko_atlas_border_fill != NULL ) + { + pixman_image_unref(neko_atlas_border_fill); + neko_atlas_border_fill = NULL; + } +} + +static bool atlas_init (void) +{ + assert(neko_atlas == NULL); + + neko_atlas = pixman_image_create_bits_no_clear( + PIXMAN_a1, neko_bitmap_width, neko_bitmap_height, + (uint32_t *)(&neko_bitmap_bits), neko_bitmap_stride + ); + if ( neko_atlas == NULL ) + { + fprintf(stderr, "ERROR: Failed to create texture atlas.\n"); + atlas_deinit(); + return false; + } + + pixman_color_t bg_colour; + colour_from_hex(&bg_colour, "0xFFFFFF"); + neko_atlas_bg_fill = pixman_image_create_solid_fill(&bg_colour); + if ( neko_atlas_bg_fill == NULL ) + { + fprintf(stderr, "ERROR: Failed to create solid fill.\n"); + atlas_deinit(); + return false; + } + + pixman_color_t border_colour; + colour_from_hex(&border_colour, "0x000000"); + neko_atlas_border_fill = pixman_image_create_solid_fill(&border_colour); + if ( neko_atlas_border_fill == NULL ) + { + fprintf(stderr, "ERROR: Failed to create solid fill.\n"); + atlas_deinit(); + return false; + } + + return true; +} + +static void atlas_composite_neko (struct Buffer *buffer, enum Neko neko_type, uint16_t x, uint16_t y) +{ + pixman_image_composite32( + PIXMAN_OP_SRC, + neko_atlas_bg_fill, /* Source. */ + neko_atlas, /* Mask. */ + buffer->pixman_image, /* Destination. */ + 0, /* Source x. */ + 0, /* Source y. */ + (uint16_t)neko_type * neko_size, /* Mask x. */ + neko_size, /* Mask y. */ + x, /* Destination x. */ + y, /* Destination y. */ + neko_size, /* Source width. */ + neko_size /* Source height. */ + ); + pixman_image_composite32( + PIXMAN_OP_OVER, + neko_atlas_border_fill, + neko_atlas, + buffer->pixman_image, + 0, + 0, + (uint16_t)neko_type * neko_size, + 0, + x, + y, + neko_size, + neko_size + ); +} + +/** Returns true if new frame is needed. */ +static bool animation_next_state (void) +{ + if ( animation_ticks_until_next_frame > 0 ) + { + animation_ticks_until_next_frame--; + return false; + } + + switch (current_neko) + { + case NEKO_STARE: + switch (rand() % 20) + { + case 0: + current_neko = NEKO_SCRATCH_1; + return true; + + case 1: + current_neko = NEKO_SLEEP_1; + animation_ticks_until_next_frame = 10; + return true; + + case 2: + current_neko = NEKO_SHOCK; + animation_ticks_until_next_frame = 5; + return true; + + case 3: + current_neko = NEKO_YAWN; + animation_ticks_until_next_frame = 5; + return true; + + case 4: + current_neko = NEKO_THINK; + animation_ticks_until_next_frame = 10; + return true; + + default: + return false; + } + break; + + case NEKO_SLEEP_1: + case NEKO_SLEEP_2: + case NEKO_SCRATCH_1: + case NEKO_SCRATCH_2: + switch (rand() % 4) + { + case 0: + current_neko = NEKO_STARE; + animation_ticks_until_next_frame = 5; + return true; + + default: + switch (current_neko) + { + case NEKO_SLEEP_1: current_neko = NEKO_SLEEP_2; break; + case NEKO_SLEEP_2: current_neko = NEKO_SLEEP_1; break; + case NEKO_SCRATCH_1: current_neko = NEKO_SCRATCH_2; break; + case NEKO_SCRATCH_2: current_neko = NEKO_SCRATCH_1; break; + default: /* unreachable. */ break; + } + if ( current_neko == NEKO_SLEEP_1 || current_neko == NEKO_SLEEP_2 ) + animation_ticks_until_next_frame = 10; + return true; + } + break; + + case NEKO_SHOCK: + case NEKO_YAWN: + case NEKO_THINK: + default: + current_neko = NEKO_STARE; + animation_ticks_until_next_frame = 5; + return true; + } + return false; +} + +/************* + * * + * Surface * + * * + *************/ +static void surface_next_frame (void) +{ + if (!surface.configured) + return; + struct Buffer *buffer = buffer_pool_next_buffer(surface_width, surface_height); + if ( buffer == NULL ) + return; + + atlas_composite_neko(buffer, current_neko, 0, 0); + + wl_surface_set_buffer_scale(surface.wl_surface, 1); + wl_surface_attach(surface.wl_surface, buffer->wl_buffer, 0, 0); + wl_surface_damage_buffer(surface.wl_surface, 0, 0, INT32_MAX, INT32_MAX); + buffer->busy = true; + wl_surface_commit(surface.wl_surface); +} + +static void surface_destroy (void) +{ + if ( surface.layer_surface != NULL ) + zwlr_layer_surface_v1_destroy(surface.layer_surface); + if ( surface.wl_surface != NULL ) + wl_surface_destroy(surface.wl_surface ); +} + +static void layer_surface_handle_configure (void *data, struct zwlr_layer_surface_v1 *layer_surface, + uint32_t serial, uint32_t width, uint32_t height) +{ + (void)data; + (void)layer_surface; + + zwlr_layer_surface_v1_ack_configure(surface.layer_surface, serial); + surface.configured = true; + + if ( width != surface_width || height != surface_height ) + fprintf(stderr, "ERROR: Bad dimensions in configure: %d %d\n", width, height); + + surface_next_frame(); +} + +static void layer_surface_handle_closed (void *data, struct zwlr_layer_surface_v1 *layer_surface) +{ + (void)data; + (void)layer_surface; + surface_destroy(); +} + +const struct zwlr_layer_surface_v1_listener layer_surface_listener = { + .configure = layer_surface_handle_configure, + .closed = layer_surface_handle_closed +}; + +static void surface_create (void) +{ + assert(!surface.configured); + + surface.wl_surface = wl_compositor_create_surface(wl_compositor); + surface.layer_surface = zwlr_layer_shell_v1_get_layer_surface( + layer_shell, + surface.wl_surface, + NULL, + ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, + "wayneko" + ); + + zwlr_layer_surface_v1_add_listener( + surface.layer_surface, + &layer_surface_listener, + NULL + ); + zwlr_layer_surface_v1_set_size( + surface.layer_surface, + surface_width, + surface_height + ); + zwlr_layer_surface_v1_set_anchor( + surface.layer_surface, + ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM + ); + + /* Empty input region. */ + struct wl_region *region = wl_compositor_create_region(wl_compositor); + wl_surface_set_input_region(surface.wl_surface, region); + wl_region_destroy(region); + + wl_surface_commit(surface.wl_surface); +} + +/********** + * * + * Main * + * * + **********/ +static void registry_handle_global (void *data, struct wl_registry *registry, + uint32_t name, const char *interface, uint32_t version) +{ + if ( strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0 ) + layer_shell = wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, 1); + else if ( strcmp(interface, wl_compositor_interface.name) == 0 ) + wl_compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 4); + else if ( strcmp(interface, wl_shm_interface.name) == 0 ) + wl_shm = wl_registry_bind(registry, name, &wl_shm_interface, 1); +} + +static const struct wl_registry_listener registry_listener = { + .global = registry_handle_global, + + /* We do not bind interfaces that - realistically - will ever disappear. */ + .global_remove = noop, +}; + +static char *check_for_interfaces (void) +{ + if ( wl_compositor == NULL ) + return "wl_compositor"; + if ( wl_shm == NULL ) + return "wl_shm"; + if ( layer_shell == NULL ) + return "wlr_layershell_v1"; + return NULL; +} + +static void sync_handle_done (void *data, struct wl_callback *wl_callback, uint32_t other) +{ + wl_callback_destroy(wl_callback); + sync_callback = NULL; + + const char *missing = check_for_interfaces(); + if ( missing != NULL ) + { + fprintf(stderr, "ERROR, Wayland compositor does not support %s.\n", missing); + loop = false; + ret = EXIT_FAILURE; + return; + } + + surface_create(); +} + +static const struct wl_callback_listener sync_callback_listener = { + .done = sync_handle_done, +}; + +static void timespec_diff (struct timespec *a, struct timespec *b, struct timespec *result) +{ + result->tv_sec = a->tv_sec - b->tv_sec; + result->tv_nsec = a->tv_nsec - b->tv_nsec; + if ( result->tv_nsec < 0 ) + { + result->tv_sec--; + result->tv_nsec += 1000000000L; + } +} + +int main (void) +{ + init_signals(); + + wl_list_init(&buffer_pool); + srand((unsigned int)time(0)); + + // TODO command line args + + if (!atlas_init()) + return EXIT_FAILURE; + + /* We query the display name here instead of letting wl_display_connect() + * figure it out itself, because libwayland (for legacy reasons) falls + * back to using "wayland-0" when $WAYLAND_DISPLAY is not set, which is + * generally not desirable. + */ + const char *display_name = getenv("WAYLAND_DISPLAY"); + if ( display_name == NULL ) + { + fputs("ERROR: WAYLAND_DISPLAY is not set.\n", stderr); + return EXIT_FAILURE; + } + + wl_display = wl_display_connect(display_name); + if ( wl_display == NULL ) + { + fputs("ERROR: Can not connect to wayland display.\n", stderr); + return EXIT_FAILURE; + } + + wl_registry = wl_display_get_registry(wl_display); + wl_registry_add_listener(wl_registry, ®istry_listener, NULL); + + sync_callback = wl_display_sync(wl_display); + wl_callback_add_listener(sync_callback, &sync_callback_listener, NULL); + + struct pollfd pollfds[] = { + { + .fd = wl_display_get_fd(wl_display), + .events = POLLIN, + }, + }; + + while (loop) + { + int current_timeout = animation_timeout; + struct timespec now; + clock_gettime(CLOCK_MONOTONIC, &now); + + if (surface.configured) + { + const uint32_t nsec_delay = animation_timeout * 1000000; + const uint32_t epsilon = 1000000; + struct timespec time_since_last_tick; + timespec_diff(&now, &last_tick, &time_since_last_tick); + if ( time_since_last_tick.tv_sec > 0 || time_since_last_tick.tv_nsec >= nsec_delay - epsilon ) + { + if (animation_next_state()) + surface_next_frame(); + fprintf(stderr, "tick!\n"); + clock_gettime(CLOCK_MONOTONIC, &last_tick); + } + else + { + const int _current_timeout = (int)(nsec_delay - time_since_last_tick.tv_nsec) / 1000000; + if ( current_timeout == -1 || current_timeout > _current_timeout ) + current_timeout = _current_timeout; + } + } + + /* Flush pending Wayland events/requests. */ + while ( wl_display_prepare_read(wl_display) != 0 ) + { + if ( wl_display_dispatch_pending(wl_display) != 0 ) + { + fprintf(stderr, "ERROR: wl_display_dispatch_pending(): %s\n", strerror(errno)); + ret = EXIT_FAILURE; + goto exit_main_loop; + } + } + while (true) + { + /* Returns the amount of bytes flushed. */ + const int flush_ret = wl_display_flush(wl_display); + if (flush_ret == -1) /* Error. */ + { + if ( errno == EAGAIN ) + continue; + fprintf(stderr, "ERROR: wl_display_flush(): %s\n", strerror(errno)); + ret = EXIT_FAILURE; + goto exit_main_loop; + } + else if (flush_ret == 0) /* Done flushing. */ + break; + } + + if ( poll(pollfds, 1, current_timeout) < 0 ) + { + if ( errno == EINTR ) /* Interrupt: Signal received. */ + continue; + fprintf(stderr, "ERROR: poll(): %s.\n", strerror(errno)); + ret = EXIT_FAILURE; + break; + } + + if ( wl_display_read_events(wl_display) == -1 ) + { + fprintf(stderr, "ERROR: wl_display_read_events(): %s.\n", strerror(errno)); + break; + } + if ( wl_display_dispatch_pending(wl_display) == -1 ) + { + fprintf(stderr, "ERROR: wl_display_dispatch_pending(): %s.\n", strerror(errno)); + break; + } + } + + /* Since C doesn't have first-class support for exiting the outer-loop + * from inside a nested loop, we unfortunately need to use a jump label. + */ +exit_main_loop: + + close(pollfds[0].fd); + + surface_destroy(); + buffer_pool_destroy_all_buffers(); + + if ( wl_compositor != NULL ) + wl_compositor_destroy(wl_compositor); + if ( wl_shm != NULL ) + wl_shm_destroy(wl_shm); + if ( layer_shell != NULL ) + zwlr_layer_shell_v1_destroy(layer_shell); + if ( sync_callback != NULL ) + wl_callback_destroy(sync_callback); + if ( wl_registry != NULL ) + wl_registry_destroy(wl_registry); + wl_display_disconnect(wl_display); + + atlas_deinit(); + + return ret; +} diff --git a/wlr-layer-shell-unstable-v1.xml b/wlr-layer-shell-unstable-v1.xml new file mode 100644 index 0000000..6a5d5d3 --- /dev/null +++ b/wlr-layer-shell-unstable-v1.xml @@ -0,0 +1,285 @@ + + + + Copyright Β© 2017 Drew DeVault + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that copyright notice and this permission + notice appear in supporting documentation, and that the name of + the copyright holders not be used in advertising or publicity + pertaining to distribution of the software without specific, + written prior permission. The copyright holders make no + representations about the suitability of this software for any + purpose. It is provided "as is" without express or implied + warranty. + + THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS + SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY + SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN + AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, + ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF + THIS SOFTWARE. + + + + + Clients can use this interface to assign the surface_layer role to + wl_surfaces. Such surfaces are assigned to a "layer" of the output and + rendered with a defined z-depth respective to each other. They may also be + anchored to the edges and corners of a screen and specify input handling + semantics. This interface should be suitable for the implementation of + many desktop shell components, and a broad number of other applications + that interact with the desktop. + + + + + Create a layer surface for an existing surface. This assigns the role of + layer_surface, or raises a protocol error if another role is already + assigned. + + Creating a layer surface from a wl_surface which has a buffer attached + or committed is a client error, and any attempts by a client to attach + or manipulate a buffer prior to the first layer_surface.configure call + must also be treated as errors. + + You may pass NULL for output to allow the compositor to decide which + output to use. Generally this will be the one that the user most + recently interacted with. + + Clients can specify a namespace that defines the purpose of the layer + surface. + + + + + + + + + + + + + + + + + These values indicate which layers a surface can be rendered in. They + are ordered by z depth, bottom-most first. Traditional shell surfaces + will typically be rendered between the bottom and top layers. + Fullscreen shell surfaces are typically rendered at the top layer. + Multiple surfaces can share a single layer, and ordering within a + single layer is undefined. + + + + + + + + + + + + An interface that may be implemented by a wl_surface, for surfaces that + are designed to be rendered as a layer of a stacked desktop-like + environment. + + Layer surface state (size, anchor, exclusive zone, margin, interactivity) + is double-buffered, and will be applied at the time wl_surface.commit of + the corresponding wl_surface is called. + + + + + Sets the size of the surface in surface-local coordinates. The + compositor will display the surface centered with respect to its + anchors. + + If you pass 0 for either value, the compositor will assign it and + inform you of the assignment in the configure event. You must set your + anchor to opposite edges in the dimensions you omit; not doing so is a + protocol error. Both values are 0 by default. + + Size is double-buffered, see wl_surface.commit. + + + + + + + + Requests that the compositor anchor the surface to the specified edges + and corners. If two orthoginal edges are specified (e.g. 'top' and + 'left'), then the anchor point will be the intersection of the edges + (e.g. the top left corner of the output); otherwise the anchor point + will be centered on that edge, or in the center if none is specified. + + Anchor is double-buffered, see wl_surface.commit. + + + + + + + Requests that the compositor avoids occluding an area of the surface + with other surfaces. The compositor's use of this information is + implementation-dependent - do not assume that this region will not + actually be occluded. + + A positive value is only meaningful if the surface is anchored to an + edge, rather than a corner. The zone is the number of surface-local + coordinates from the edge that are considered exclusive. + + Surfaces that do not wish to have an exclusive zone may instead specify + how they should interact with surfaces that do. If set to zero, the + surface indicates that it would like to be moved to avoid occluding + surfaces with a positive excluzive zone. If set to -1, the surface + indicates that it would not like to be moved to accomodate for other + surfaces, and the compositor should extend it all the way to the edges + it is anchored to. + + For example, a panel might set its exclusive zone to 10, so that + maximized shell surfaces are not shown on top of it. A notification + might set its exclusive zone to 0, so that it is moved to avoid + occluding the panel, but shell surfaces are shown underneath it. A + wallpaper or lock screen might set their exclusive zone to -1, so that + they stretch below or over the panel. + + The default value is 0. + + Exclusive zone is double-buffered, see wl_surface.commit. + + + + + + + Requests that the surface be placed some distance away from the anchor + point on the output, in surface-local coordinates. Setting this value + for edges you are not anchored to has no effect. + + The exclusive zone includes the margin. + + Margin is double-buffered, see wl_surface.commit. + + + + + + + + + + Set to 1 to request that the seat send keyboard events to this layer + surface. For layers below the shell surface layer, the seat will use + normal focus semantics. For layers above the shell surface layers, the + seat will always give exclusive keyboard focus to the top-most layer + which has keyboard interactivity set to true. + + Layer surfaces receive pointer, touch, and tablet events normally. If + you do not want to receive them, set the input region on your surface + to an empty region. + + Events is double-buffered, see wl_surface.commit. + + + + + + + This assigns an xdg_popup's parent to this layer_surface. This popup + should have been created via xdg_surface::get_popup with the parent set + to NULL, and this request must be invoked before committing the popup's + initial state. + + See the documentation of xdg_popup for more details about what an + xdg_popup is and how it is used. + + + + + + + When a configure event is received, if a client commits the + surface in response to the configure event, then the client + must make an ack_configure request sometime before the commit + request, passing along the serial of the configure event. + + If the client receives multiple configure events before it + can respond to one, it only has to ack the last configure event. + + A client is not required to commit immediately after sending + an ack_configure request - it may even ack_configure several times + before its next surface commit. + + A client may send multiple ack_configure requests before committing, but + only the last request sent before a commit indicates which configure + event the client really is responding to. + + + + + + + This request destroys the layer surface. + + + + + + The configure event asks the client to resize its surface. + + Clients should arrange their surface for the new states, and then send + an ack_configure request with the serial sent in this configure event at + some point before committing the new surface. + + The client is free to dismiss all but the last configure event it + received. + + The width and height arguments specify the size of the window in + surface-local coordinates. + + The size is a hint, in the sense that the client is free to ignore it if + it doesn't resize, pick a smaller size (to satisfy aspect ratio or + resize in steps of NxM pixels). If the client picks a smaller size and + is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the + surface will be centered on this axis. + + If the width or height arguments are zero, it means the client should + decide its own window dimension. + + + + + + + + + The closed event is sent by the compositor when the surface will no + longer be shown. The output may have been destroyed or the user may + have asked for it to be removed. Further changes to the surface will be + ignored. The client should destroy the resource after receiving this + event, and create a new surface if they so choose. + + + + + + + + + + + + + + + + + diff --git a/xdg-shell.xml b/xdg-shell.xml new file mode 100644 index 0000000..ae8ab67 --- /dev/null +++ b/xdg-shell.xml @@ -0,0 +1,1249 @@ + + + + + Copyright Β© 2008-2013 Kristian HΓΈgsberg + Copyright Β© 2013 Rafael Antognolli + Copyright Β© 2013 Jasper St. Pierre + Copyright Β© 2010-2013 Intel Corporation + Copyright Β© 2015-2017 Samsung Electronics Co., Ltd + Copyright Β© 2015-2017 Red Hat Inc. + + Permission is hereby granted, free of charge, to any person obtaining a + copy of this software and associated documentation files (the "Software"), + to deal in the Software without restriction, including without limitation + the rights to use, copy, modify, merge, publish, distribute, sublicense, + and/or sell copies of the Software, and to permit persons to whom the + Software is furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice (including the next + paragraph) shall be included in all copies or substantial portions of the + Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. + + + + + The xdg_wm_base interface is exposed as a global object enabling clients + to turn their wl_surfaces into windows in a desktop environment. It + defines the basic functionality needed for clients and the compositor to + create windows that can be dragged, resized, maximized, etc, as well as + creating transient windows such as popup menus. + + + + + + + + + + + + + + Destroy this xdg_wm_base object. + + Destroying a bound xdg_wm_base object while there are surfaces + still alive created by this xdg_wm_base object instance is illegal + and will result in a protocol error. + + + + + + Create a positioner object. A positioner object is used to position + surfaces relative to some parent surface. See the interface description + and xdg_surface.get_popup for details. + + + + + + + This creates an xdg_surface for the given surface. While xdg_surface + itself is not a role, the corresponding surface may only be assigned + a role extending xdg_surface, such as xdg_toplevel or xdg_popup. + + This creates an xdg_surface for the given surface. An xdg_surface is + used as basis to define a role to a given surface, such as xdg_toplevel + or xdg_popup. It also manages functionality shared between xdg_surface + based surface roles. + + See the documentation of xdg_surface for more details about what an + xdg_surface is and how it is used. + + + + + + + + A client must respond to a ping event with a pong request or + the client may be deemed unresponsive. See xdg_wm_base.ping. + + + + + + + The ping event asks the client if it's still alive. Pass the + serial specified in the event back to the compositor by sending + a "pong" request back with the specified serial. See xdg_wm_base.pong. + + Compositors can use this to determine if the client is still + alive. It's unspecified what will happen if the client doesn't + respond to the ping request, or in what timeframe. Clients should + try to respond in a reasonable amount of time. + + A compositor is free to ping in any way it wants, but a client must + always respond to any xdg_wm_base object it created. + + + + + + + + The xdg_positioner provides a collection of rules for the placement of a + child surface relative to a parent surface. Rules can be defined to ensure + the child surface remains within the visible area's borders, and to + specify how the child surface changes its position, such as sliding along + an axis, or flipping around a rectangle. These positioner-created rules are + constrained by the requirement that a child surface must intersect with or + be at least partially adjacent to its parent surface. + + See the various requests for details about possible rules. + + At the time of the request, the compositor makes a copy of the rules + specified by the xdg_positioner. Thus, after the request is complete the + xdg_positioner object can be destroyed or reused; further changes to the + object will have no effect on previous usages. + + For an xdg_positioner object to be considered complete, it must have a + non-zero size set by set_size, and a non-zero anchor rectangle set by + set_anchor_rect. Passing an incomplete xdg_positioner object when + positioning a surface raises an error. + + + + + + + + + Notify the compositor that the xdg_positioner will no longer be used. + + + + + + Set the size of the surface that is to be positioned with the positioner + object. The size is in surface-local coordinates and corresponds to the + window geometry. See xdg_surface.set_window_geometry. + + If a zero or negative size is set the invalid_input error is raised. + + + + + + + + Specify the anchor rectangle within the parent surface that the child + surface will be placed relative to. The rectangle is relative to the + window geometry as defined by xdg_surface.set_window_geometry of the + parent surface. + + When the xdg_positioner object is used to position a child surface, the + anchor rectangle may not extend outside the window geometry of the + positioned child's parent surface. + + If a negative size is set the invalid_input error is raised. + + + + + + + + + + + + + + + + + + + + + + Defines the anchor point for the anchor rectangle. The specified anchor + is used derive an anchor point that the child surface will be + positioned relative to. If a corner anchor is set (e.g. 'top_left' or + 'bottom_right'), the anchor point will be at the specified corner; + otherwise, the derived anchor point will be centered on the specified + edge, or in the center of the anchor rectangle if no edge is specified. + + + + + + + + + + + + + + + + + + + Defines in what direction a surface should be positioned, relative to + the anchor point of the parent surface. If a corner gravity is + specified (e.g. 'bottom_right' or 'top_left'), then the child surface + will be placed towards the specified gravity; otherwise, the child + surface will be centered over the anchor point on any axis that had no + gravity specified. + + + + + + + The constraint adjustment value define ways the compositor will adjust + the position of the surface, if the unadjusted position would result + in the surface being partly constrained. + + Whether a surface is considered 'constrained' is left to the compositor + to determine. For example, the surface may be partly outside the + compositor's defined 'work area', thus necessitating the child surface's + position be adjusted until it is entirely inside the work area. + + The adjustments can be combined, according to a defined precedence: 1) + Flip, 2) Slide, 3) Resize. + + + + Don't alter the surface position even if it is constrained on some + axis, for example partially outside the edge of an output. + + + + + Slide the surface along the x axis until it is no longer constrained. + + First try to slide towards the direction of the gravity on the x axis + until either the edge in the opposite direction of the gravity is + unconstrained or the edge in the direction of the gravity is + constrained. + + Then try to slide towards the opposite direction of the gravity on the + x axis until either the edge in the direction of the gravity is + unconstrained or the edge in the opposite direction of the gravity is + constrained. + + + + + Slide the surface along the y axis until it is no longer constrained. + + First try to slide towards the direction of the gravity on the y axis + until either the edge in the opposite direction of the gravity is + unconstrained or the edge in the direction of the gravity is + constrained. + + Then try to slide towards the opposite direction of the gravity on the + y axis until either the edge in the direction of the gravity is + unconstrained or the edge in the opposite direction of the gravity is + constrained. + + + + + Invert the anchor and gravity on the x axis if the surface is + constrained on the x axis. For example, if the left edge of the + surface is constrained, the gravity is 'left' and the anchor is + 'left', change the gravity to 'right' and the anchor to 'right'. + + If the adjusted position also ends up being constrained, the resulting + position of the flip_x adjustment will be the one before the + adjustment. + + + + + Invert the anchor and gravity on the y axis if the surface is + constrained on the y axis. For example, if the bottom edge of the + surface is constrained, the gravity is 'bottom' and the anchor is + 'bottom', change the gravity to 'top' and the anchor to 'top'. + + The adjusted position is calculated given the original anchor + rectangle and offset, but with the new flipped anchor and gravity + values. + + If the adjusted position also ends up being constrained, the resulting + position of the flip_y adjustment will be the one before the + adjustment. + + + + + Resize the surface horizontally so that it is completely + unconstrained. + + + + + Resize the surface vertically so that it is completely unconstrained. + + + + + + + Specify how the window should be positioned if the originally intended + position caused the surface to be constrained, meaning at least + partially outside positioning boundaries set by the compositor. The + adjustment is set by constructing a bitmask describing the adjustment to + be made when the surface is constrained on that axis. + + If no bit for one axis is set, the compositor will assume that the child + surface should not change its position on that axis when constrained. + + If more than one bit for one axis is set, the order of how adjustments + are applied is specified in the corresponding adjustment descriptions. + + The default adjustment is none. + + + + + + + Specify the surface position offset relative to the position of the + anchor on the anchor rectangle and the anchor on the surface. For + example if the anchor of the anchor rectangle is at (x, y), the surface + has the gravity bottom|right, and the offset is (ox, oy), the calculated + surface position will be (x + ox, y + oy). The offset position of the + surface is the one used for constraint testing. See + set_constraint_adjustment. + + An example use case is placing a popup menu on top of a user interface + element, while aligning the user interface element of the parent surface + with some user interface element placed somewhere in the popup surface. + + + + + + + + + + When set reactive, the surface is reconstrained if the conditions used + for constraining changed, e.g. the parent window moved. + + If the conditions changed and the popup was reconstrained, an + xdg_popup.configure event is sent with updated geometry, followed by an + xdg_surface.configure event. + + + + + + Set the parent window geometry the compositor should use when + positioning the popup. The compositor may use this information to + determine the future state the popup should be constrained using. If + this doesn't match the dimension of the parent the popup is eventually + positioned against, the behavior is undefined. + + The arguments are given in the surface-local coordinate space. + + + + + + + + Set the serial of an xdg_surface.configure event this positioner will be + used in response to. The compositor may use this information together + with set_parent_size to determine what future state the popup should be + constrained using. + + + + + + + + An interface that may be implemented by a wl_surface, for + implementations that provide a desktop-style user interface. + + It provides a base set of functionality required to construct user + interface elements requiring management by the compositor, such as + toplevel windows, menus, etc. The types of functionality are split into + xdg_surface roles. + + Creating an xdg_surface does not set the role for a wl_surface. In order + to map an xdg_surface, the client must create a role-specific object + using, e.g., get_toplevel, get_popup. The wl_surface for any given + xdg_surface can have at most one role, and may not be assigned any role + not based on xdg_surface. + + A role must be assigned before any other requests are made to the + xdg_surface object. + + The client must call wl_surface.commit on the corresponding wl_surface + for the xdg_surface state to take effect. + + Creating an xdg_surface from a wl_surface which has a buffer attached or + committed is a client error, and any attempts by a client to attach or + manipulate a buffer prior to the first xdg_surface.configure call must + also be treated as errors. + + After creating a role-specific object and setting it up, the client must + perform an initial commit without any buffer attached. The compositor + will reply with an xdg_surface.configure event. The client must + acknowledge it and is then allowed to attach a buffer to map the surface. + + Mapping an xdg_surface-based role surface is defined as making it + possible for the surface to be shown by the compositor. Note that + a mapped surface is not guaranteed to be visible once it is mapped. + + For an xdg_surface to be mapped by the compositor, the following + conditions must be met: + (1) the client has assigned an xdg_surface-based role to the surface + (2) the client has set and committed the xdg_surface state and the + role-dependent state to the surface + (3) the client has committed a buffer to the surface + + A newly-unmapped surface is considered to have met condition (1) out + of the 3 required conditions for mapping a surface if its role surface + has not been destroyed. + + + + + + + + + + + Destroy the xdg_surface object. An xdg_surface must only be destroyed + after its role object has been destroyed. + + + + + + This creates an xdg_toplevel object for the given xdg_surface and gives + the associated wl_surface the xdg_toplevel role. + + See the documentation of xdg_toplevel for more details about what an + xdg_toplevel is and how it is used. + + + + + + + This creates an xdg_popup object for the given xdg_surface and gives + the associated wl_surface the xdg_popup role. + + If null is passed as a parent, a parent surface must be specified using + some other protocol, before committing the initial state. + + See the documentation of xdg_popup for more details about what an + xdg_popup is and how it is used. + + + + + + + + + The window geometry of a surface is its "visible bounds" from the + user's perspective. Client-side decorations often have invisible + portions like drop-shadows which should be ignored for the + purposes of aligning, placing and constraining windows. + + The window geometry is double buffered, and will be applied at the + time wl_surface.commit of the corresponding wl_surface is called. + + When maintaining a position, the compositor should treat the (x, y) + coordinate of the window geometry as the top left corner of the window. + A client changing the (x, y) window geometry coordinate should in + general not alter the position of the window. + + Once the window geometry of the surface is set, it is not possible to + unset it, and it will remain the same until set_window_geometry is + called again, even if a new subsurface or buffer is attached. + + If never set, the value is the full bounds of the surface, + including any subsurfaces. This updates dynamically on every + commit. This unset is meant for extremely simple clients. + + The arguments are given in the surface-local coordinate space of + the wl_surface associated with this xdg_surface. + + The width and height must be greater than zero. Setting an invalid size + will raise an error. When applied, the effective window geometry will be + the set window geometry clamped to the bounding rectangle of the + combined geometry of the surface of the xdg_surface and the associated + subsurfaces. + + + + + + + + + + When a configure event is received, if a client commits the + surface in response to the configure event, then the client + must make an ack_configure request sometime before the commit + request, passing along the serial of the configure event. + + For instance, for toplevel surfaces the compositor might use this + information to move a surface to the top left only when the client has + drawn itself for the maximized or fullscreen state. + + If the client receives multiple configure events before it + can respond to one, it only has to ack the last configure event. + + A client is not required to commit immediately after sending + an ack_configure request - it may even ack_configure several times + before its next surface commit. + + A client may send multiple ack_configure requests before committing, but + only the last request sent before a commit indicates which configure + event the client really is responding to. + + + + + + + The configure event marks the end of a configure sequence. A configure + sequence is a set of one or more events configuring the state of the + xdg_surface, including the final xdg_surface.configure event. + + Where applicable, xdg_surface surface roles will during a configure + sequence extend this event as a latched state sent as events before the + xdg_surface.configure event. Such events should be considered to make up + a set of atomically applied configuration states, where the + xdg_surface.configure commits the accumulated state. + + Clients should arrange their surface for the new states, and then send + an ack_configure request with the serial sent in this configure event at + some point before committing the new surface. + + If the client receives multiple configure events before it can respond + to one, it is free to discard all but the last event it received. + + + + + + + + + This interface defines an xdg_surface role which allows a surface to, + among other things, set window-like properties such as maximize, + fullscreen, and minimize, set application-specific metadata like title and + id, and well as trigger user interactive operations such as interactive + resize and move. + + Unmapping an xdg_toplevel means that the surface cannot be shown + by the compositor until it is explicitly mapped again. + All active operations (e.g., move, resize) are canceled and all + attributes (e.g. title, state, stacking, ...) are discarded for + an xdg_toplevel surface when it is unmapped. The xdg_toplevel returns to + the state it had right after xdg_surface.get_toplevel. The client + can re-map the toplevel by perfoming a commit without any buffer + attached, waiting for a configure event and handling it as usual (see + xdg_surface description). + + Attaching a null buffer to a toplevel unmaps the surface. + + + + + This request destroys the role surface and unmaps the surface; + see "Unmapping" behavior in interface section for details. + + + + + + Set the "parent" of this surface. This surface should be stacked + above the parent surface and all other ancestor surfaces. + + Parent windows should be set on dialogs, toolboxes, or other + "auxiliary" surfaces, so that the parent is raised when the dialog + is raised. + + Setting a null parent for a child window removes any parent-child + relationship for the child. Setting a null parent for a window which + currently has no parent is a no-op. + + If the parent is unmapped then its children are managed as + though the parent of the now-unmapped parent has become the + parent of this surface. If no parent exists for the now-unmapped + parent then the children are managed as though they have no + parent surface. + + + + + + + Set a short title for the surface. + + This string may be used to identify the surface in a task bar, + window list, or other user interface elements provided by the + compositor. + + The string must be encoded in UTF-8. + + + + + + + Set an application identifier for the surface. + + The app ID identifies the general class of applications to which + the surface belongs. The compositor can use this to group multiple + surfaces together, or to determine how to launch a new application. + + For D-Bus activatable applications, the app ID is used as the D-Bus + service name. + + The compositor shell will try to group application surfaces together + by their app ID. As a best practice, it is suggested to select app + ID's that match the basename of the application's .desktop file. + For example, "org.freedesktop.FooViewer" where the .desktop file is + "org.freedesktop.FooViewer.desktop". + + Like other properties, a set_app_id request can be sent after the + xdg_toplevel has been mapped to update the property. + + See the desktop-entry specification [0] for more details on + application identifiers and how they relate to well-known D-Bus + names and .desktop files. + + [0] http://standards.freedesktop.org/desktop-entry-spec/ + + + + + + + Clients implementing client-side decorations might want to show + a context menu when right-clicking on the decorations, giving the + user a menu that they can use to maximize or minimize the window. + + This request asks the compositor to pop up such a window menu at + the given position, relative to the local surface coordinates of + the parent surface. There are no guarantees as to what menu items + the window menu contains. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. + + + + + + + + + + Start an interactive, user-driven move of the surface. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. The passed + serial is used to determine the type of interactive move (touch, + pointer, etc). + + The server may ignore move requests depending on the state of + the surface (e.g. fullscreen or maximized), or if the passed serial + is no longer valid. + + If triggered, the surface will lose the focus of the device + (wl_pointer, wl_touch, etc) used for the move. It is up to the + compositor to visually indicate that the move is taking place, such as + updating a pointer cursor, during the move. There is no guarantee + that the device focus will return when the move is completed. + + + + + + + + These values are used to indicate which edge of a surface + is being dragged in a resize operation. + + + + + + + + + + + + + + + Start a user-driven, interactive resize of the surface. + + This request must be used in response to some sort of user action + like a button press, key press, or touch down event. The passed + serial is used to determine the type of interactive resize (touch, + pointer, etc). + + The server may ignore resize requests depending on the state of + the surface (e.g. fullscreen or maximized). + + If triggered, the client will receive configure events with the + "resize" state enum value and the expected sizes. See the "resize" + enum value for more details about what is required. The client + must also acknowledge configure events using "ack_configure". After + the resize is completed, the client will receive another "configure" + event without the resize state. + + If triggered, the surface also will lose the focus of the device + (wl_pointer, wl_touch, etc) used for the resize. It is up to the + compositor to visually indicate that the resize is taking place, + such as updating a pointer cursor, during the resize. There is no + guarantee that the device focus will return when the resize is + completed. + + The edges parameter specifies how the surface should be resized, + and is one of the values of the resize_edge enum. The compositor + may use this information to update the surface position for + example when dragging the top left corner. The compositor may also + use this information to adapt its behavior, e.g. choose an + appropriate cursor image. + + + + + + + + + The different state values used on the surface. This is designed for + state values like maximized, fullscreen. It is paired with the + configure event to ensure that both the client and the compositor + setting the state can be synchronized. + + States set in this way are double-buffered. They will get applied on + the next commit. + + + + The surface is maximized. The window geometry specified in the configure + event must be obeyed by the client. + + The client should draw without shadow or other + decoration outside of the window geometry. + + + + + The surface is fullscreen. The window geometry specified in the + configure event is a maximum; the client cannot resize beyond it. For + a surface to cover the whole fullscreened area, the geometry + dimensions must be obeyed by the client. For more details, see + xdg_toplevel.set_fullscreen. + + + + + The surface is being resized. The window geometry specified in the + configure event is a maximum; the client cannot resize beyond it. + Clients that have aspect ratio or cell sizing configuration can use + a smaller size, however. + + + + + Client window decorations should be painted as if the window is + active. Do not assume this means that the window actually has + keyboard or pointer focus. + + + + + The window is currently in a tiled layout and the left edge is + considered to be adjacent to another part of the tiling grid. + + + + + The window is currently in a tiled layout and the right edge is + considered to be adjacent to another part of the tiling grid. + + + + + The window is currently in a tiled layout and the top edge is + considered to be adjacent to another part of the tiling grid. + + + + + The window is currently in a tiled layout and the bottom edge is + considered to be adjacent to another part of the tiling grid. + + + + + + + Set a maximum size for the window. + + The client can specify a maximum size so that the compositor does + not try to configure the window beyond this size. + + The width and height arguments are in window geometry coordinates. + See xdg_surface.set_window_geometry. + + Values set in this way are double-buffered. They will get applied + on the next commit. + + The compositor can use this information to allow or disallow + different states like maximize or fullscreen and draw accurate + animations. + + Similarly, a tiling window manager may use this information to + place and resize client windows in a more effective way. + + The client should not rely on the compositor to obey the maximum + size. The compositor may decide to ignore the values set by the + client and request a larger size. + + If never set, or a value of zero in the request, means that the + client has no expected maximum size in the given dimension. + As a result, a client wishing to reset the maximum size + to an unspecified state can use zero for width and height in the + request. + + Requesting a maximum size to be smaller than the minimum size of + a surface is illegal and will result in a protocol error. + + The width and height must be greater than or equal to zero. Using + strictly negative values for width and height will result in a + protocol error. + + + + + + + + Set a minimum size for the window. + + The client can specify a minimum size so that the compositor does + not try to configure the window below this size. + + The width and height arguments are in window geometry coordinates. + See xdg_surface.set_window_geometry. + + Values set in this way are double-buffered. They will get applied + on the next commit. + + The compositor can use this information to allow or disallow + different states like maximize or fullscreen and draw accurate + animations. + + Similarly, a tiling window manager may use this information to + place and resize client windows in a more effective way. + + The client should not rely on the compositor to obey the minimum + size. The compositor may decide to ignore the values set by the + client and request a smaller size. + + If never set, or a value of zero in the request, means that the + client has no expected minimum size in the given dimension. + As a result, a client wishing to reset the minimum size + to an unspecified state can use zero for width and height in the + request. + + Requesting a minimum size to be larger than the maximum size of + a surface is illegal and will result in a protocol error. + + The width and height must be greater than or equal to zero. Using + strictly negative values for width and height will result in a + protocol error. + + + + + + + + Maximize the surface. + + After requesting that the surface should be maximized, the compositor + will respond by emitting a configure event. Whether this configure + actually sets the window maximized is subject to compositor policies. + The client must then update its content, drawing in the configured + state. The client must also acknowledge the configure when committing + the new content (see ack_configure). + + It is up to the compositor to decide how and where to maximize the + surface, for example which output and what region of the screen should + be used. + + If the surface was already maximized, the compositor will still emit + a configure event with the "maximized" state. + + If the surface is in a fullscreen state, this request has no direct + effect. It may alter the state the surface is returned to when + unmaximized unless overridden by the compositor. + + + + + + Unmaximize the surface. + + After requesting that the surface should be unmaximized, the compositor + will respond by emitting a configure event. Whether this actually + un-maximizes the window is subject to compositor policies. + If available and applicable, the compositor will include the window + geometry dimensions the window had prior to being maximized in the + configure event. The client must then update its content, drawing it in + the configured state. The client must also acknowledge the configure + when committing the new content (see ack_configure). + + It is up to the compositor to position the surface after it was + unmaximized; usually the position the surface had before maximizing, if + applicable. + + If the surface was already not maximized, the compositor will still + emit a configure event without the "maximized" state. + + If the surface is in a fullscreen state, this request has no direct + effect. It may alter the state the surface is returned to when + unmaximized unless overridden by the compositor. + + + + + + Make the surface fullscreen. + + After requesting that the surface should be fullscreened, the + compositor will respond by emitting a configure event. Whether the + client is actually put into a fullscreen state is subject to compositor + policies. The client must also acknowledge the configure when + committing the new content (see ack_configure). + + The output passed by the request indicates the client's preference as + to which display it should be set fullscreen on. If this value is NULL, + it's up to the compositor to choose which display will be used to map + this surface. + + If the surface doesn't cover the whole output, the compositor will + position the surface in the center of the output and compensate with + with border fill covering the rest of the output. The content of the + border fill is undefined, but should be assumed to be in some way that + attempts to blend into the surrounding area (e.g. solid black). + + If the fullscreened surface is not opaque, the compositor must make + sure that other screen content not part of the same surface tree (made + up of subsurfaces, popups or similarly coupled surfaces) are not + visible below the fullscreened surface. + + + + + + + Make the surface no longer fullscreen. + + After requesting that the surface should be unfullscreened, the + compositor will respond by emitting a configure event. + Whether this actually removes the fullscreen state of the client is + subject to compositor policies. + + Making a surface unfullscreen sets states for the surface based on the following: + * the state(s) it may have had before becoming fullscreen + * any state(s) decided by the compositor + * any state(s) requested by the client while the surface was fullscreen + + The compositor may include the previous window geometry dimensions in + the configure event, if applicable. + + The client must also acknowledge the configure when committing the new + content (see ack_configure). + + + + + + Request that the compositor minimize your surface. There is no + way to know if the surface is currently minimized, nor is there + any way to unset minimization on this surface. + + If you are looking to throttle redrawing when minimized, please + instead use the wl_surface.frame event for this, as this will + also work with live previews on windows in Alt-Tab, Expose or + similar compositor features. + + + + + + This configure event asks the client to resize its toplevel surface or + to change its state. The configured state should not be applied + immediately. See xdg_surface.configure for details. + + The width and height arguments specify a hint to the window + about how its surface should be resized in window geometry + coordinates. See set_window_geometry. + + If the width or height arguments are zero, it means the client + should decide its own window dimension. This may happen when the + compositor needs to configure the state of the surface but doesn't + have any information about any previous or expected dimension. + + The states listed in the event specify how the width/height + arguments should be interpreted, and possibly how it should be + drawn. + + Clients must send an ack_configure in response to this event. See + xdg_surface.configure and xdg_surface.ack_configure for details. + + + + + + + + + The close event is sent by the compositor when the user + wants the surface to be closed. This should be equivalent to + the user clicking the close button in client-side decorations, + if your application has any. + + This is only a request that the user intends to close the + window. The client may choose to ignore this request, or show + a dialog to ask the user to save their data, etc. + + + + + + + A popup surface is a short-lived, temporary surface. It can be used to + implement for example menus, popovers, tooltips and other similar user + interface concepts. + + A popup can be made to take an explicit grab. See xdg_popup.grab for + details. + + When the popup is dismissed, a popup_done event will be sent out, and at + the same time the surface will be unmapped. See the xdg_popup.popup_done + event for details. + + Explicitly destroying the xdg_popup object will also dismiss the popup and + unmap the surface. Clients that want to dismiss the popup when another + surface of their own is clicked should dismiss the popup using the destroy + request. + + A newly created xdg_popup will be stacked on top of all previously created + xdg_popup surfaces associated with the same xdg_toplevel. + + The parent of an xdg_popup must be mapped (see the xdg_surface + description) before the xdg_popup itself. + + The client must call wl_surface.commit on the corresponding wl_surface + for the xdg_popup state to take effect. + + + + + + + + + This destroys the popup. Explicitly destroying the xdg_popup + object will also dismiss the popup, and unmap the surface. + + If this xdg_popup is not the "topmost" popup, a protocol error + will be sent. + + + + + + This request makes the created popup take an explicit grab. An explicit + grab will be dismissed when the user dismisses the popup, or when the + client destroys the xdg_popup. This can be done by the user clicking + outside the surface, using the keyboard, or even locking the screen + through closing the lid or a timeout. + + If the compositor denies the grab, the popup will be immediately + dismissed. + + This request must be used in response to some sort of user action like a + button press, key press, or touch down event. The serial number of the + event should be passed as 'serial'. + + The parent of a grabbing popup must either be an xdg_toplevel surface or + another xdg_popup with an explicit grab. If the parent is another + xdg_popup it means that the popups are nested, with this popup now being + the topmost popup. + + Nested popups must be destroyed in the reverse order they were created + in, e.g. the only popup you are allowed to destroy at all times is the + topmost one. + + When compositors choose to dismiss a popup, they may dismiss every + nested grabbing popup as well. When a compositor dismisses popups, it + will follow the same dismissing order as required from the client. + + The parent of a grabbing popup must either be another xdg_popup with an + active explicit grab, or an xdg_popup or xdg_toplevel, if there are no + explicit grabs already taken. + + If the topmost grabbing popup is destroyed, the grab will be returned to + the parent of the popup, if that parent previously had an explicit grab. + + If the parent is a grabbing popup which has already been dismissed, this + popup will be immediately dismissed. If the parent is a popup that did + not take an explicit grab, an error will be raised. + + During a popup grab, the client owning the grab will receive pointer + and touch events for all their surfaces as normal (similar to an + "owner-events" grab in X11 parlance), while the top most grabbing popup + will always have keyboard focus. + + + + + + + + This event asks the popup surface to configure itself given the + configuration. The configured state should not be applied immediately. + See xdg_surface.configure for details. + + The x and y arguments represent the position the popup was placed at + given the xdg_positioner rule, relative to the upper left corner of the + window geometry of the parent surface. + + For version 2 or older, the configure event for an xdg_popup is only + ever sent once for the initial configuration. Starting with version 3, + it may be sent again if the popup is setup with an xdg_positioner with + set_reactive requested, or in response to xdg_popup.reposition requests. + + + + + + + + + + The popup_done event is sent out when a popup is dismissed by the + compositor. The client should destroy the xdg_popup object at this + point. + + + + + + + + Reposition an already-mapped popup. The popup will be placed given the + details in the passed xdg_positioner object, and a + xdg_popup.repositioned followed by xdg_popup.configure and + xdg_surface.configure will be emitted in response. Any parameters set + by the previous positioner will be discarded. + + The passed token will be sent in the corresponding + xdg_popup.repositioned event. The new popup position will not take + effect until the corresponding configure event is acknowledged by the + client. See xdg_popup.repositioned for details. The token itself is + opaque, and has no other special meaning. + + If multiple reposition requests are sent, the compositor may skip all + but the last one. + + If the popup is repositioned in response to a configure event for its + parent, the client should send an xdg_positioner.set_parent_configure + and possibly an xdg_positioner.set_parent_size request to allow the + compositor to properly constrain the popup. + + If the popup is repositioned together with a parent that is being + resized, but not in response to a configure event, the client should + send an xdg_positioner.set_parent_size request. + + + + + + + + The repositioned event is sent as part of a popup configuration + sequence, together with xdg_popup.configure and lastly + xdg_surface.configure to notify the completion of a reposition request. + + The repositioned event is to notify about the completion of a + xdg_popup.reposition request. The token argument is the token passed + in the xdg_popup.reposition request. + + Immediately after this event is emitted, xdg_popup.configure and + xdg_surface.configure will be sent with the updated size and position, + as well as a new configure serial. + + The client should optionally update the content of the popup, but must + acknowledge the new popup configuration for the new position to take + effect. See xdg_surface.ack_configure for details. + + + + + +