This is a fork of https://github.com/swaywm/sway that replaces pango with https://codeberg.org/dnkl/fcft for font rendering. Note: do not use the master branch; use one of the fontconfig branches
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#include <assert.h>
#include <linux/input-event-codes.h>
#include <stdlib.h>
#include <wayland-client.h>
#include <wayland-cursor.h>
#include "list.h"
#include "log.h"
#include "swaybar/bar.h"
#include "swaybar/config.h"
#include "swaybar/input.h"
#include "swaybar/ipc.h"
void free_hotspots(struct wl_list *list) {
struct swaybar_hotspot *hotspot, *tmp;
wl_list_for_each_safe(hotspot, tmp, list, link) {
wl_list_remove(&hotspot->link);
if (hotspot->destroy) {
hotspot->destroy(hotspot->data);
}
free(hotspot);
}
}
uint32_t event_to_x11_button(uint32_t event) {
switch (event) {
case BTN_LEFT:
return 1;
case BTN_MIDDLE:
return 2;
case BTN_RIGHT:
return 3;
case SWAY_SCROLL_UP:
return 4;
case SWAY_SCROLL_DOWN:
return 5;
case SWAY_SCROLL_LEFT:
return 6;
case SWAY_SCROLL_RIGHT:
return 7;
case BTN_SIDE:
return 8;
case BTN_EXTRA:
return 9;
default:
return 0;
}
}
static uint32_t wl_axis_to_button(uint32_t axis, wl_fixed_t value) {
bool negative = wl_fixed_to_double(value) < 0;
switch (axis) {
case WL_POINTER_AXIS_VERTICAL_SCROLL:
return negative ? SWAY_SCROLL_UP : SWAY_SCROLL_DOWN;
case WL_POINTER_AXIS_HORIZONTAL_SCROLL:
return negative ? SWAY_SCROLL_LEFT : SWAY_SCROLL_RIGHT;
default:
sway_log(SWAY_DEBUG, "Unexpected axis value on mouse scroll");
return 0;
}
}
void update_cursor(struct swaybar_seat *seat) {
struct swaybar_pointer *pointer = &seat->pointer;
if (!pointer || !pointer->cursor_surface) {
return;
}
if (pointer->cursor_theme) {
wl_cursor_theme_destroy(pointer->cursor_theme);
}
const char *cursor_theme = getenv("XCURSOR_THEME");
unsigned cursor_size = 24;
const char *env_cursor_size = getenv("XCURSOR_SIZE");
if (env_cursor_size && strlen(env_cursor_size) > 0) {
errno = 0;
char *end;
unsigned size = strtoul(env_cursor_size, &end, 10);
if (!*end && errno == 0) {
cursor_size = size;
}
}
int scale = pointer->current ? pointer->current->scale : 1;
pointer->cursor_theme = wl_cursor_theme_load(
cursor_theme, cursor_size * scale, seat->bar->shm);
struct wl_cursor *cursor;
cursor = wl_cursor_theme_get_cursor(pointer->cursor_theme, "left_ptr");
pointer->cursor_image = cursor->images[0];
wl_surface_set_buffer_scale(pointer->cursor_surface, scale);
wl_surface_attach(pointer->cursor_surface,
wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
wl_pointer_set_cursor(pointer->pointer, pointer->serial,
pointer->cursor_surface,
pointer->cursor_image->hotspot_x / scale,
pointer->cursor_image->hotspot_y / scale);
wl_surface_damage_buffer(pointer->cursor_surface, 0, 0,
INT32_MAX, INT32_MAX);
wl_surface_commit(pointer->cursor_surface);
}
static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface,
wl_fixed_t surface_x, wl_fixed_t surface_y) {
struct swaybar_seat *seat = data;
struct swaybar_pointer *pointer = &seat->pointer;
seat->pointer.x = wl_fixed_to_double(surface_x);
seat->pointer.y = wl_fixed_to_double(surface_y);
pointer->serial = serial;
struct swaybar_output *output;
wl_list_for_each(output, &seat->bar->outputs, link) {
if (output->surface == surface) {
pointer->current = output;
break;
}
}
update_cursor(seat);
}
static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface) {
struct swaybar_seat *seat = data;
seat->pointer.current = NULL;
}
static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
struct swaybar_seat *seat = data;
seat->pointer.x = wl_fixed_to_double(surface_x);
seat->pointer.y = wl_fixed_to_double(surface_y);
}
static bool check_bindings(struct swaybar *bar, uint32_t button,
uint32_t state) {
bool released = state == WL_POINTER_BUTTON_STATE_RELEASED;
for (int i = 0; i < bar->config->bindings->length; i++) {
struct swaybar_binding *binding = bar->config->bindings->items[i];
if (binding->button == button && binding->release == released) {
ipc_execute_binding(bar, binding);
return true;
}
}
return false;
}
static bool process_hotspots(struct swaybar_output *output,
double x, double y, uint32_t button) {
double px = x * output->scale;
double py = y * output->scale;
struct swaybar_hotspot *hotspot;
wl_list_for_each(hotspot, &output->hotspots, link) {
if (px >= hotspot->x && py >= hotspot->y
&& px < hotspot->x + hotspot->width
&& py < hotspot->y + hotspot->height) {
if (HOTSPOT_IGNORE == hotspot->callback(output, hotspot, x, y,
button, hotspot->data)) {
return true;
}
}
}
return false;
}
static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
struct swaybar_seat *seat = data;
struct swaybar_pointer *pointer = &seat->pointer;
struct swaybar_output *output = pointer->current;
if (!sway_assert(output, "button with no active output")) {
return;
}
if (check_bindings(seat->bar, button, state)) {
return;
}
if (state != WL_POINTER_BUTTON_STATE_PRESSED) {
return;
}
process_hotspots(output, pointer->x, pointer->y, button);
}
static void workspace_next(struct swaybar *bar, struct swaybar_output *output,
bool left) {
struct swaybar_config *config = bar->config;
struct swaybar_workspace *first =
wl_container_of(output->workspaces.next, first, link);
struct swaybar_workspace *last =
wl_container_of(output->workspaces.prev, last, link);
struct swaybar_workspace *active;
wl_list_for_each(active, &output->workspaces, link) {
if (active->visible) {
break;
}
}
if (!sway_assert(active->visible, "axis with null workspace")) {
return;
}
struct swaybar_workspace *new;
if (left) {
if (active == first) {
new = config->wrap_scroll ? last : NULL;
} else {
new = wl_container_of(active->link.prev, new, link);
}
} else {
if (active == last) {
new = config->wrap_scroll ? first : NULL;
} else {
new = wl_container_of(active->link.next, new, link);
}
}
if (new) {
ipc_send_workspace_command(bar, new->name);
// Since we're asking Sway to switch to 'new', it should become visible.
// Marking it visible right now allows calling workspace_next in a loop.
new->visible = true;
active->visible = false;
}
}
static void process_discrete_scroll(struct swaybar_seat *seat,
struct swaybar_output *output, struct swaybar_pointer *pointer,
uint32_t axis, wl_fixed_t value) {
// If there is a button press binding, execute it, skip default behavior,
// and check button release bindings
uint32_t button = wl_axis_to_button(axis, value);
if (check_bindings(seat->bar, button, WL_POINTER_BUTTON_STATE_PRESSED)) {
check_bindings(seat->bar, button, WL_POINTER_BUTTON_STATE_RELEASED);
return;
}
if (process_hotspots(output, pointer->x, pointer->y, button)) {
return;
}
struct swaybar_config *config = seat->bar->config;
double amt = wl_fixed_to_double(value);
if (amt == 0.0 || !config->workspace_buttons) {
check_bindings(seat->bar, button, WL_POINTER_BUTTON_STATE_RELEASED);
return;
}
if (!sway_assert(!wl_list_empty(&output->workspaces), "axis with no workspaces")) {
return;
}
workspace_next(seat->bar, output, amt < 0.0);
// Check button release bindings
check_bindings(seat->bar, button, WL_POINTER_BUTTON_STATE_RELEASED);
}
static void process_continuous_scroll(struct swaybar_seat *seat,
struct swaybar_output *output, struct swaybar_pointer *pointer,
uint32_t axis) {
while (abs(seat->axis[axis].value) > SWAY_CONTINUOUS_SCROLL_THRESHOLD) {
if (seat->axis[axis].value > 0) {
process_discrete_scroll(seat, output, pointer, axis,
SWAY_CONTINUOUS_SCROLL_THRESHOLD);
seat->axis[axis].value -= SWAY_CONTINUOUS_SCROLL_THRESHOLD;
} else {
process_discrete_scroll(seat, output, pointer, axis,
-SWAY_CONTINUOUS_SCROLL_THRESHOLD);
seat->axis[axis].value += SWAY_CONTINUOUS_SCROLL_THRESHOLD;
}
}
}
static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
uint32_t time, uint32_t axis, wl_fixed_t value) {
struct swaybar_seat *seat = data;
struct swaybar_pointer *pointer = &seat->pointer;
struct swaybar_output *output = pointer->current;
if (!sway_assert(output, "axis with no active output")) {
return;
}
if (!sway_assert(axis < 2, "axis out of range")) {
return;
}
// If there's a while since the last scroll event,
// set 'value' to zero as if to reset the "virtual scroll wheel"
if (seat->axis[axis].discrete_steps == 0 &&
time - seat->axis[axis].update_time > SWAY_CONTINUOUS_SCROLL_TIMEOUT) {
seat->axis[axis].value = 0;
}
seat->axis[axis].value += value;
seat->axis[axis].update_time = time;
}
static void wl_pointer_frame(void *data, struct wl_pointer *wl_pointer) {
struct swaybar_seat *seat = data;
struct swaybar_pointer *pointer = &seat->pointer;
struct swaybar_output *output = pointer->current;
if (output == NULL) {
return;
}
for (uint32_t axis = 0; axis < 2; ++axis) {
if (seat->axis[axis].discrete_steps) {
for (uint32_t step = 0; step < seat->axis[axis].discrete_steps; ++step) {
// Honestly, it would probabyl make sense to pass in
// 'seat->axis[axis].value / seat->axis[axi].discrete_steps' here,
// but it's only used to check whether it's positive or negative
// so I don't think it's worth the risk of rounding errors.
process_discrete_scroll(seat, output, pointer, axis,
seat->axis[axis].value);
}
seat->axis[axis].value = 0;
seat->axis[axis].discrete_steps = 0;
} else {
process_continuous_scroll(seat, output, pointer, axis);
}
}
}
static void wl_pointer_axis_source(void *data, struct wl_pointer *wl_pointer,
uint32_t axis_source) {
// Who cares
}
static void wl_pointer_axis_stop(void *data, struct wl_pointer *wl_pointer,
uint32_t time, uint32_t axis) {
// Who cares
}
static void wl_pointer_axis_discrete(void *data, struct wl_pointer *wl_pointer,
uint32_t axis, int32_t discrete) {
struct swaybar_seat *seat = data;
if (!sway_assert(axis < 2, "axis out of range")) {
return;
}
seat->axis[axis].discrete_steps += abs(discrete);
}
static const struct wl_pointer_listener pointer_listener = {
.enter = wl_pointer_enter,
.leave = wl_pointer_leave,
.motion = wl_pointer_motion,
.button = wl_pointer_button,
.axis = wl_pointer_axis,
.frame = wl_pointer_frame,
.axis_source = wl_pointer_axis_source,
.axis_stop = wl_pointer_axis_stop,
.axis_discrete = wl_pointer_axis_discrete,
};
static struct touch_slot *get_touch_slot(struct swaybar_touch *touch, int32_t id) {
ssize_t next = -1;
for (size_t i = 0; i < sizeof(touch->slots) / sizeof(*touch->slots); ++i) {
if (touch->slots[i].id == id) {
return &touch->slots[i];
}
if (next == -1 && !touch->slots[i].output) {
next = i;
}
}
if (next == -1) {
sway_log(SWAY_ERROR, "Ran out of touch slots");
return NULL;
}
return &touch->slots[next];
}
static void wl_touch_down(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, struct wl_surface *surface,
int32_t id, wl_fixed_t _x, wl_fixed_t _y) {
struct swaybar_seat *seat = data;
struct swaybar_output *_output = NULL, *output = NULL;
wl_list_for_each(_output, &seat->bar->outputs, link) {
if (_output->surface == surface) {
output = _output;
break;
}
}
if (!output) {
sway_log(SWAY_DEBUG, "Got touch event for unknown surface");
return;
}
struct touch_slot *slot = get_touch_slot(&seat->touch, id);
if (!slot) {
return;
}
slot->id = id;
slot->output = output;
slot->x = slot->start_x = wl_fixed_to_double(_x);
slot->y = slot->start_y = wl_fixed_to_double(_y);
slot->time = time;
}
static void wl_touch_up(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, int32_t id) {
struct swaybar_seat *seat = data;
struct touch_slot *slot = get_touch_slot(&seat->touch, id);
if (!slot) {
return;
}
if (time - slot->time < 500) {
// Tap, treat it like a pointer click
process_hotspots(slot->output, slot->x, slot->y, BTN_LEFT);
}
slot->output = NULL;
}
static void wl_touch_motion(void *data, struct wl_touch *wl_touch,
uint32_t time, int32_t id, wl_fixed_t x, wl_fixed_t y) {
struct swaybar_seat *seat = data;
struct touch_slot *slot = get_touch_slot(&seat->touch, id);
if (!slot) {
return;
}
int prev_progress = (int)((slot->x - slot->start_x)
/ slot->output->width * 100);
slot->x = wl_fixed_to_double(x);
slot->y = wl_fixed_to_double(y);
// "progress" is a measure from 0..100 representing the fraction of the
// output the touch gesture has travelled, positive when moving to the right
// and negative when moving to the left.
int progress = (int)((slot->x - slot->start_x)
/ slot->output->width * 100);
if (abs(progress) / 20 != abs(prev_progress) / 20) {
workspace_next(seat->bar, slot->output, progress - prev_progress < 0);
}
}
static void wl_touch_frame(void *data, struct wl_touch *wl_touch) {
// Who cares
}
static void wl_touch_cancel(void *data, struct wl_touch *wl_touch) {
struct swaybar_seat *seat = data;
struct swaybar_touch *touch = &seat->touch;
for (size_t i = 0; i < sizeof(touch->slots) / sizeof(*touch->slots); ++i) {
touch->slots[i].output = NULL;
}
}
static void wl_touch_shape(void *data, struct wl_touch *wl_touch, int32_t id,
wl_fixed_t major, wl_fixed_t minor) {
// Who cares
}
static void wl_touch_orientation(void *data, struct wl_touch *wl_touch,
int32_t id, wl_fixed_t orientation) {
// Who cares
}
static const struct wl_touch_listener touch_listener = {
.down = wl_touch_down,
.up = wl_touch_up,
.motion = wl_touch_motion,
.frame = wl_touch_frame,
.cancel = wl_touch_cancel,
.shape = wl_touch_shape,
.orientation = wl_touch_orientation,
};
static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps) {
struct swaybar_seat *seat = data;
bool have_pointer = caps & WL_SEAT_CAPABILITY_POINTER;
bool have_touch = caps & WL_SEAT_CAPABILITY_TOUCH;
if (!have_pointer && seat->pointer.pointer != NULL) {
wl_pointer_release(seat->pointer.pointer);
seat->pointer.pointer = NULL;
} else if (have_pointer && seat->pointer.pointer == NULL) {
seat->pointer.pointer = wl_seat_get_pointer(wl_seat);
if (seat->bar->running && !seat->pointer.cursor_surface) {
seat->pointer.cursor_surface =
wl_compositor_create_surface(seat->bar->compositor);
assert(seat->pointer.cursor_surface);
}
wl_pointer_add_listener(seat->pointer.pointer, &pointer_listener, seat);
}
if (!have_touch && seat->touch.touch != NULL) {
wl_touch_release(seat->touch.touch);
seat->touch.touch = NULL;
} else if (have_touch && seat->touch.touch == NULL) {
seat->touch.touch = wl_seat_get_touch(wl_seat);
wl_touch_add_listener(seat->touch.touch, &touch_listener, seat);
}
}
static void seat_handle_name(void *data, struct wl_seat *wl_seat,
const char *name) {
// Who cares
}
const struct wl_seat_listener seat_listener = {
.capabilities = seat_handle_capabilities,
.name = seat_handle_name,
};
void swaybar_seat_free(struct swaybar_seat *seat) {
if (!seat) {
return;
}
if (seat->pointer.pointer != NULL) {
wl_pointer_release(seat->pointer.pointer);
}
if (seat->pointer.cursor_theme != NULL) {
wl_cursor_theme_destroy(seat->pointer.cursor_theme);
}
if (seat->pointer.cursor_surface != NULL) {
wl_surface_destroy(seat->pointer.cursor_surface);
}
if (seat->touch.touch != NULL) {
wl_touch_release(seat->touch.touch);
}
wl_seat_destroy(seat->wl_seat);
wl_list_remove(&seat->link);
free(seat);
}