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Split main.c into smaller files

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This commit is contained in:
Johan Malm 2019-12-26 21:37:31 +00:00
parent a194e07809
commit 52f81e4a39
8 changed files with 539 additions and 513 deletions
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2
Makefile
View file

@ -15,7 +15,7 @@ WS = `pkg-config --variable=wayland_scanner wayland-scanner`
all: labwc all: labwc
labwc: xdg-shell-protocol.o main.o labwc: xdg-shell-protocol.o main.o xdg.o view.o xwl.o server.o output.o
$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS) $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
xdg-shell-protocol.h: xdg-shell-protocol.h:

26
labwc.h
View file

@ -120,4 +120,30 @@ struct tinywl_keyboard {
struct wl_listener key; struct wl_listener key;
}; };
void xdg_surface_map(struct wl_listener *listener, void *data);
void xdg_surface_unmap(struct wl_listener *listener, void *data);
void xdg_surface_destroy(struct wl_listener *listener, void *data);
void xdg_toplevel_request_move(struct wl_listener *listener, void *data);
void xdg_toplevel_request_resize(struct wl_listener *listener, void *data);
void xdg_surface_new(struct wl_listener *listener, void *data);
int xwl_nr_parents(struct tinywl_view *view);
void xwl_surface_map(struct wl_listener *listener, void *data);
void xwl_surface_unmap(struct wl_listener *listener, void *data);
void xwl_surface_destroy(struct wl_listener *listener, void *data);
void xwl_surface_configure(struct wl_listener *listener, void *data);
void xwl_surface_new(struct wl_listener *listener, void *data);
void focus_view(struct tinywl_view *view, struct wlr_surface *surface);
void view_focus_next_toplevel(struct tinywl_server *server);
void begin_interactive(struct tinywl_view *view, enum tinywl_cursor_mode mode, uint32_t edges);
bool is_toplevel(struct tinywl_view *view);
/* TODO: try to refactor to remove from header file */
struct tinywl_view *first_toplevel(struct tinywl_server *server);
void server_new_output(struct wl_listener *listener, void *data);
void output_frame(struct wl_listener *listener, void *data);
#endif /* LABWC_H */ #endif /* LABWC_H */

515
main.c
View file

@ -6,79 +6,6 @@
#include <wlr/types/wlr_gamma_control_v1.h> #include <wlr/types/wlr_gamma_control_v1.h>
#include <wlr/types/wlr_primary_selection_v1.h> #include <wlr/types/wlr_primary_selection_v1.h>
static struct tinywl_view *next_toplevel(struct tinywl_view *current);
static bool is_toplevel(struct tinywl_view *view);
static void process_cursor_move(struct tinywl_server *server, uint32_t time);
static void begin_interactive(struct tinywl_view *view,
enum tinywl_cursor_mode mode, uint32_t edges);
/**
* Request that this toplevel surface show itself in an activated or
* deactivated state.
*/
static void set_activated(struct wlr_surface *s, bool activated) {
if (wlr_surface_is_xdg_surface(s)) {
struct wlr_xdg_surface *previous;
previous = wlr_xdg_surface_from_wlr_surface(s);
wlr_xdg_toplevel_set_activated(previous, activated);
} else {
struct wlr_xwayland_surface *previous;
previous = wlr_xwayland_surface_from_wlr_surface(s);
wlr_xwayland_surface_activate(previous, activated);
}
}
static void activate_view(struct tinywl_view *view) {
if (view->type == LAB_XDG_SHELL_VIEW) {
wlr_xdg_toplevel_set_activated(view->xdg_surface, true);
} else if (view->type == LAB_XWAYLAND_VIEW) {
wlr_xwayland_surface_activate(view->xwayland_surface, true);
} else {
fprintf(stderr, "warn: view was of unknown type (%s)\n", __func__);
}
}
static void move_to_front(struct tinywl_view *view) {
wl_list_remove(&view->link);
wl_list_insert(&view->server->views, &view->link);
}
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;
prev_surface = seat->keyboard_state.focused_surface;
if (prev_surface == surface) {
/* Don't re-focus an already focused surface. */
return;
}
if (view->type == LAB_XWAYLAND_VIEW) {
/* Don't focus on menus, etc */
if (!wlr_xwayland_or_surface_wants_focus(view->xwayland_surface)) {
return;
}
}
if (prev_surface) {
set_activated(seat->keyboard_state.focused_surface, false);
}
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
move_to_front(view);
activate_view(view);
/*
* 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->surface, keyboard->keycodes,
keyboard->num_keycodes, &keyboard->modifiers);
}
static struct tinywl_view *last_toplevel(struct tinywl_server *server) { static struct tinywl_view *last_toplevel(struct tinywl_server *server) {
struct tinywl_view *view; struct tinywl_view *view;
@ -94,21 +21,6 @@ static struct tinywl_view *last_toplevel(struct tinywl_server *server) {
return NULL; return NULL;
} }
static struct tinywl_view *first_toplevel(struct tinywl_server *server) {
struct tinywl_view *view;
wl_list_for_each(view, &server->views, link) {
if (!view->been_mapped) {
continue;
}
if (is_toplevel(view)) {
return view;
}
}
fprintf(stderr, "warn: found no toplevel view (%s)\n", __func__);
return NULL;
}
static void view_focus_last_toplevel(struct tinywl_server *server) { static void view_focus_last_toplevel(struct tinywl_server *server) {
/* TODO: write view_nr_toplevel_views() */ /* TODO: write view_nr_toplevel_views() */
if (wl_list_length(&server->views) < 2) { if (wl_list_length(&server->views) < 2) {
@ -118,13 +30,6 @@ static void view_focus_last_toplevel(struct tinywl_server *server) {
focus_view(view, view->surface); focus_view(view, view->surface);
} }
static void view_focus_next_toplevel(struct tinywl_server *server) {
struct tinywl_view *view;
view = first_toplevel(server);
view = next_toplevel(view);
focus_view(view, view->surface);
}
static void keyboard_handle_modifiers( static void keyboard_handle_modifiers(
struct wl_listener *listener, void *data) { struct wl_listener *listener, void *data) {
/* This event is raised when a modifier key, such as shift or alt, is /* This event is raised when a modifier key, such as shift or alt, is
@ -143,31 +48,6 @@ static void keyboard_handle_modifiers(
&keyboard->device->keyboard->modifiers); &keyboard->device->keyboard->modifiers);
} }
static int xwl_nr_parents(struct tinywl_view *view) {
struct wlr_xwayland_surface *s = view->xwayland_surface;
int i = 0;
if (!s) {
fprintf(stderr, "warn: (%s) no xwayland surface\n", __func__);
return -1;
}
while (s->parent) {
s = s->parent;
++i;
}
return i;
}
static bool is_toplevel(struct tinywl_view *view) {
switch (view->type) {
case LAB_XWAYLAND_VIEW:
return xwl_nr_parents(view) > 0 ? false : true;
case LAB_XDG_SHELL_VIEW:
return view->xdg_surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL;
}
return false;
}
static void xdg_debug_show_one_view(struct tinywl_view *view) { static void xdg_debug_show_one_view(struct tinywl_view *view) {
fprintf(stderr, "XDG "); fprintf(stderr, "XDG ");
switch (view->xdg_surface->role) { switch (view->xdg_surface->role) {
@ -240,17 +120,6 @@ static void debug_show_views(struct tinywl_server *server) {
debug_show_one_view(view); debug_show_one_view(view);
} }
static struct tinywl_view *next_toplevel(struct tinywl_view *current) {
struct tinywl_view *tmp = current;
goto inside;
while (!tmp->been_mapped || !is_toplevel(tmp)) {
inside:
tmp = wl_container_of(tmp->link.next, tmp, link);
}
return tmp;
}
static bool handle_keybinding(struct tinywl_server *server, xkb_keysym_t sym) { static bool handle_keybinding(struct tinywl_server *server, xkb_keysym_t sym) {
/* /*
* Here we handle compositor keybindings. This is when the compositor is * Here we handle compositor keybindings. This is when the compositor is
@ -404,7 +273,7 @@ static void seat_request_cursor(struct wl_listener *listener, void *data) {
} }
} }
static bool view_at(struct tinywl_view *view, bool view_at(struct tinywl_view *view,
double lx, double ly, struct wlr_surface **surface, double lx, double ly, struct wlr_surface **surface,
double *sx, double *sy) { double *sx, double *sy) {
/* /*
@ -625,384 +494,6 @@ static void server_cursor_frame(struct wl_listener *listener, void *data) {
wlr_seat_pointer_notify_frame(server->seat); wlr_seat_pointer_notify_frame(server->seat);
} }
/*
* 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_decorations(struct wlr_output *output, struct tinywl_view *view) {
if (!view->surface)
return;
if (view->type != LAB_XWAYLAND_VIEW)
return;
if (!is_toplevel(view))
return;
struct wlr_box box = {
.x = view->x - XWL_WINDOW_BORDER,
.y = view->y - XWL_TITLEBAR_HEIGHT - XWL_WINDOW_BORDER,
.width = view->surface->current.width + 2 * XWL_WINDOW_BORDER,
.height = view->surface->current.height + XWL_TITLEBAR_HEIGHT +
2 * XWL_WINDOW_BORDER,
};
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
output->transform_matrix);
float color[] = { 0.2, 0.2, 0.7, 0.9 };
wlr_render_quad_with_matrix(view->server->renderer, color, matrix);
}
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 coordinates, width and height, and an output geometry, then
* prepares an orthographic projection and multiplies the necessary
* transforms to produce a model-view-projection matrix.
*
* Naturally you can do this any way you like, for example to make a 3D
* compositor.
*/
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_attach_render makes the OpenGL context current. */
if (!wlr_output_attach_render(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,
};
render_decorations(output->wlr_output, view);
/* This calls our render_surface function for each surface among the
* xdg_surface's toplevel and popups. */
if (view->type == LAB_XDG_SHELL_VIEW) {
wlr_xdg_surface_for_each_surface(view->xdg_surface,
render_surface, &rdata);
} else if (view->type == LAB_XWAYLAND_VIEW) {
render_surface(view->xwayland_surface->surface, 0, 0,
&rdata);
}
}
/* Hardware cursors are rendered by the GPU on a separate plane, and can be
* moved around without re-rendering what's beneath them - which is more
* efficient. However, not all hardware supports hardware cursors. For this
* reason, wlroots provides a software fallback, which we ask it to render
* here. wlr_cursor handles configuring hardware vs software cursors for you,
* and this function is a no-op when hardware cursors are in use. */
wlr_output_render_software_cursors(output->wlr_output, NULL);
/* Conclude rendering and swap the buffers, showing the final frame
* on-screen. */
wlr_renderer_end(renderer);
wlr_output_commit(output->wlr_output);
}
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 xwl_surface_map(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, map);
view->mapped = true;
view->been_mapped = true;
view->x = view->xwayland_surface->x;
view->y = view->xwayland_surface->y;
view->surface = view->xwayland_surface->surface;
move_to_front(view);
focus_view(view, view->xwayland_surface->surface);
}
static void xwl_surface_unmap(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, unmap);
view->mapped = false;
if (is_toplevel(view))
view_focus_next_toplevel(view->server);
}
static void xwl_surface_destroy(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, destroy);
wl_list_remove(&view->link);
free(view);
}
static void xwl_surface_configure(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, request_configure);
struct wlr_xwayland_surface_configure_event *event = data;
wlr_xwayland_surface_configure(view->xwayland_surface, event->x, event->y,
event->width, event->height);
}
void server_new_xwayland_surface(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, new_xwayland_surface);
struct wlr_xwayland_surface *xwayland_surface = data;
wlr_xwayland_surface_ping(xwayland_surface);
struct tinywl_view *view = calloc(1, sizeof(struct tinywl_view));
view->server = server;
view->type = LAB_XWAYLAND_VIEW;
view->xwayland_surface = xwayland_surface;
view->map.notify = xwl_surface_map;
wl_signal_add(&xwayland_surface->events.map, &view->map);
view->unmap.notify = xwl_surface_unmap;
wl_signal_add(&xwayland_surface->events.unmap, &view->unmap);
view->destroy.notify = xwl_surface_destroy;
wl_signal_add(&xwayland_surface->events.destroy, &view->destroy);
view->request_configure.notify = xwl_surface_configure;
wl_signal_add(&xwayland_surface->events.request_configure, &view->request_configure);
wl_list_insert(&server->views, &view->link);
}
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;
view->been_mapped = true;
view->surface = view->xdg_surface->surface;
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;
view_focus_next_toplevel(view->server);
}
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->surface != focused_surface) {
/* Deny move/resize requests from unfocused clients. */
return;
}
server->grabbed_view = view;
server->cursor_mode = mode;
struct wlr_box geo_box;
switch (view->type) {
case LAB_XDG_SHELL_VIEW:
wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box);
break;
case LAB_XWAYLAND_VIEW:
geo_box.x = view->xwayland_surface->x;
geo_box.y = view->xwayland_surface->y;
geo_box.width = view->xwayland_surface->width;
geo_box.height = view->xwayland_surface->height;
break;
}
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 whenever 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 whenever 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->type = LAB_XDG_SHELL_VIEW;
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[]) { int main(int argc, char *argv[]) {
wlr_log_init(WLR_ERROR, NULL); wlr_log_init(WLR_ERROR, NULL);
char *startup_cmd = NULL; char *startup_cmd = NULL;
@ -1074,7 +565,7 @@ int main(int argc, char *argv[]) {
*/ */
wl_list_init(&server.views); wl_list_init(&server.views);
server.xdg_shell = wlr_xdg_shell_create(server.wl_display); server.xdg_shell = wlr_xdg_shell_create(server.wl_display);
server.new_xdg_surface.notify = server_new_xdg_surface; server.new_xdg_surface.notify = xdg_surface_new;
wl_signal_add(&server.xdg_shell->events.new_surface, wl_signal_add(&server.xdg_shell->events.new_surface,
&server.new_xdg_surface); &server.new_xdg_surface);
@ -1146,7 +637,7 @@ int main(int argc, char *argv[]) {
/* Init xwayland */ /* Init xwayland */
server.xwayland = wlr_xwayland_create(server.wl_display, server.compositor, false); server.xwayland = wlr_xwayland_create(server.wl_display, server.compositor, false);
server.new_xwayland_surface.notify = server_new_xwayland_surface; server.new_xwayland_surface.notify = xwl_surface_new;
wl_signal_add(&server.xwayland->events.new_surface, &server.new_xwayland_surface); wl_signal_add(&server.xwayland->events.new_surface, &server.new_xwayland_surface);
setenv("DISPLAY", server.xwayland->display_name, true); setenv("DISPLAY", server.xwayland->display_name, true);
wlr_xwayland_set_seat(server.xwayland, server.seat); wlr_xwayland_set_seat(server.xwayland, server.seat);

164
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#include "labwc.h"
/*
* 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_decorations(struct wlr_output *output, struct tinywl_view *view) {
if (!view->surface)
return;
if (view->type != LAB_XWAYLAND_VIEW)
return;
if (!is_toplevel(view))
return;
struct wlr_box box = {
.x = view->x - XWL_WINDOW_BORDER,
.y = view->y - XWL_TITLEBAR_HEIGHT - XWL_WINDOW_BORDER,
.width = view->surface->current.width + 2 * XWL_WINDOW_BORDER,
.height = view->surface->current.height + XWL_TITLEBAR_HEIGHT +
2 * XWL_WINDOW_BORDER,
};
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
output->transform_matrix);
float color[] = { 0.2, 0.2, 0.7, 0.9 };
wlr_render_quad_with_matrix(view->server->renderer, color, matrix);
}
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 coordinates, width and height, and an output geometry, then
* prepares an orthographic projection and multiplies the necessary
* transforms to produce a model-view-projection matrix.
*
* Naturally you can do this any way you like, for example to make a 3D
* compositor.
*/
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);
}
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_attach_render makes the OpenGL context current. */
if (!wlr_output_attach_render(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,
};
render_decorations(output->wlr_output, view);
/* This calls our render_surface function for each surface among the
* xdg_surface's toplevel and popups. */
if (view->type == LAB_XDG_SHELL_VIEW) {
wlr_xdg_surface_for_each_surface(view->xdg_surface,
render_surface, &rdata);
} else if (view->type == LAB_XWAYLAND_VIEW) {
render_surface(view->xwayland_surface->surface, 0, 0,
&rdata);
}
}
/* Hardware cursors are rendered by the GPU on a separate plane, and can be
* moved around without re-rendering what's beneath them - which is more
* efficient. However, not all hardware supports hardware cursors. For this
* reason, wlroots provides a software fallback, which we ask it to render
* here. wlr_cursor handles configuring hardware vs software cursors for you,
* and this function is a no-op when hardware cursors are in use. */
wlr_output_render_software_cursors(output->wlr_output, NULL);
/* Conclude rendering and swap the buffers, showing the final frame
* on-screen. */
wlr_renderer_end(renderer);
wlr_output_commit(output->wlr_output);
}

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#include "labwc.h"
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);
}

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@ -0,0 +1,152 @@
#include "labwc.h"
static void activate_view(struct tinywl_view *view) {
if (view->type == LAB_XDG_SHELL_VIEW) {
wlr_xdg_toplevel_set_activated(view->xdg_surface, true);
} else if (view->type == LAB_XWAYLAND_VIEW) {
wlr_xwayland_surface_activate(view->xwayland_surface, true);
} else {
fprintf(stderr, "warn: view was of unknown type (%s)\n", __func__);
}
}
/**
* Request that this toplevel surface show itself in an activated or
* deactivated state.
*/
static void set_activated(struct wlr_surface *s, bool activated) {
if (wlr_surface_is_xdg_surface(s)) {
struct wlr_xdg_surface *previous;
previous = wlr_xdg_surface_from_wlr_surface(s);
wlr_xdg_toplevel_set_activated(previous, activated);
} else {
struct wlr_xwayland_surface *previous;
previous = wlr_xwayland_surface_from_wlr_surface(s);
wlr_xwayland_surface_activate(previous, activated);
}
}
static void move_to_front(struct tinywl_view *view) {
wl_list_remove(&view->link);
wl_list_insert(&view->server->views, &view->link);
}
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;
prev_surface = seat->keyboard_state.focused_surface;
if (prev_surface == surface) {
/* Don't re-focus an already focused surface. */
return;
}
if (view->type == LAB_XWAYLAND_VIEW) {
/* Don't focus on menus, etc */
move_to_front(view);
if (!wlr_xwayland_or_surface_wants_focus(view->xwayland_surface)) {
return;
}
}
if (prev_surface) {
set_activated(seat->keyboard_state.focused_surface, false);
}
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
move_to_front(view);
activate_view(view);
/*
* 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->surface, keyboard->keycodes,
keyboard->num_keycodes, &keyboard->modifiers);
}
static struct tinywl_view *next_toplevel(struct tinywl_view *current)
{
struct tinywl_view *tmp = current;
do {
tmp = wl_container_of(tmp->link.next, tmp, link);
} while (!tmp->been_mapped || !is_toplevel(tmp));
return tmp;
}
void view_focus_next_toplevel(struct tinywl_server *server) {
struct tinywl_view *view;
view = first_toplevel(server);
view = next_toplevel(view);
focus_view(view, view->surface);
}
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->surface != focused_surface) {
/* Deny move/resize requests from unfocused clients. */
return;
}
server->grabbed_view = view;
server->cursor_mode = mode;
struct wlr_box geo_box;
switch (view->type) {
case LAB_XDG_SHELL_VIEW:
wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box);
break;
case LAB_XWAYLAND_VIEW:
geo_box.x = view->xwayland_surface->x;
geo_box.y = view->xwayland_surface->y;
geo_box.width = view->xwayland_surface->width;
geo_box.height = view->xwayland_surface->height;
break;
}
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;
}
bool is_toplevel(struct tinywl_view *view) {
switch (view->type) {
case LAB_XWAYLAND_VIEW:
return xwl_nr_parents(view) > 0 ? false : true;
case LAB_XDG_SHELL_VIEW:
return view->xdg_surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL;
}
return false;
}
struct tinywl_view *first_toplevel(struct tinywl_server *server) {
struct tinywl_view *view;
wl_list_for_each(view, &server->views, link) {
if (!view->been_mapped) {
continue;
}
if (is_toplevel(view)) {
return view;
}
}
fprintf(stderr, "warn: found no toplevel view (%s)\n", __func__);
return NULL;
}

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#include "labwc.h"
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;
view->been_mapped = true;
view->surface = view->xdg_surface->surface;
focus_view(view, view->xdg_surface->surface);
}
void xdg_surface_unmap(struct wl_listener *listener, void *data)
{
struct tinywl_view *view = wl_container_of(listener, view, unmap);
view->mapped = false;
view_focus_next_toplevel(view->server);
}
void xdg_surface_destroy(struct wl_listener *listener, void *data)
{
struct tinywl_view *view = wl_container_of(listener, view, destroy);
wl_list_remove(&view->link);
free(view);
}
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 whenever they want. */
struct tinywl_view *view = wl_container_of(listener, view, request_move);
begin_interactive(view, TINYWL_CURSOR_MOVE, 0);
}
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 whenever 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);
}
void xdg_surface_new(struct wl_listener *listener, void *data)
{
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;
}
struct tinywl_view *view =
calloc(1, sizeof(struct tinywl_view));
view->server = server;
view->type = LAB_XDG_SHELL_VIEW;
view->xdg_surface = xdg_surface;
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);
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);
wl_list_insert(&server->views, &view->link);
}

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#include "labwc.h"
int xwl_nr_parents(struct tinywl_view *view) {
struct wlr_xwayland_surface *s = view->xwayland_surface;
int i = 0;
if (!s) {
fprintf(stderr, "warn: (%s) no xwayland surface\n", __func__);
return -1;
}
while (s->parent) {
s = s->parent;
++i;
}
return i;
}
void xwl_surface_map(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, map);
view->mapped = true;
view->been_mapped = true;
view->x = view->xwayland_surface->x;
view->y = view->xwayland_surface->y;
view->surface = view->xwayland_surface->surface;
focus_view(view, view->xwayland_surface->surface);
}
void xwl_surface_unmap(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, unmap);
view->mapped = false;
if (is_toplevel(view))
view_focus_next_toplevel(view->server);
}
void xwl_surface_destroy(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, destroy);
wl_list_remove(&view->link);
free(view);
}
void xwl_surface_configure(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, request_configure);
struct wlr_xwayland_surface_configure_event *event = data;
wlr_xwayland_surface_configure(view->xwayland_surface, event->x, event->y,
event->width, event->height);
}
void xwl_surface_new(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, new_xwayland_surface);
struct wlr_xwayland_surface *xwayland_surface = data;
wlr_xwayland_surface_ping(xwayland_surface);
struct tinywl_view *view = calloc(1, sizeof(struct tinywl_view));
view->server = server;
view->type = LAB_XWAYLAND_VIEW;
view->xwayland_surface = xwayland_surface;
view->map.notify = xwl_surface_map;
wl_signal_add(&xwayland_surface->events.map, &view->map);
view->unmap.notify = xwl_surface_unmap;
wl_signal_add(&xwayland_surface->events.unmap, &view->unmap);
view->destroy.notify = xwl_surface_destroy;
wl_signal_add(&xwayland_surface->events.destroy, &view->destroy);
view->request_configure.notify = xwl_surface_configure;
wl_signal_add(&xwayland_surface->events.request_configure, &view->request_configure);
wl_list_insert(&server->views, &view->link);
}