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#define _XOPEN_SOURCE 700
#include <assert.h>
#include <math.h>
#include <stdlib.h>
#include <wlr/types/wlr_region.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/util/edges.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#ifdef __linux__
#include <linux/input-event-codes.h>
#elif __FreeBSD__
#include <dev/evdev/input-event-codes.h>
#endif
#include "rootston/cursor.h"
#include "rootston/desktop.h"
#include "rootston/view.h"
#include "rootston/xcursor.h"
struct roots_cursor *roots_cursor_create(struct roots_seat *seat) {
struct roots_cursor *cursor = calloc(1, sizeof(struct roots_cursor));
if (!cursor) {
return NULL;
}
cursor->cursor = wlr_cursor_create();
if (!cursor->cursor) {
free(cursor);
return NULL;
}
cursor->default_xcursor = ROOTS_XCURSOR_DEFAULT;
return cursor;
}
void roots_cursor_destroy(struct roots_cursor *cursor) {
// TODO
}
static void seat_view_deco_motion(struct roots_seat_view *view, double deco_sx, double deco_sy) {
struct roots_cursor *cursor = view->seat->cursor;
double sx = deco_sx;
double sy = deco_sy;
if (view->has_button_grab) {
sx = view->grab_sx;
sy = view->grab_sy;
}
enum roots_deco_part parts = view_get_deco_part(view->view, sx, sy);
bool is_titlebar = (parts & ROOTS_DECO_PART_TITLEBAR);
uint32_t edges = 0;
if (parts & ROOTS_DECO_PART_LEFT_BORDER) {
edges |= WLR_EDGE_LEFT;
} else if (parts & ROOTS_DECO_PART_RIGHT_BORDER) {
edges |= WLR_EDGE_RIGHT;
} else if (parts & ROOTS_DECO_PART_BOTTOM_BORDER) {
edges |= WLR_EDGE_BOTTOM;
} else if (parts & ROOTS_DECO_PART_TOP_BORDER) {
edges |= WLR_EDGE_TOP;
}
if (view->has_button_grab) {
if (is_titlebar) {
roots_seat_begin_move(view->seat, view->view);
} else if (edges) {
roots_seat_begin_resize(view->seat, view->view, edges);
}
view->has_button_grab = false;
} else {
if (is_titlebar) {
wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
cursor->default_xcursor, cursor->cursor);
} else if (edges) {
const char *resize_name = wlr_xcursor_get_resize_name(edges);
wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
resize_name, cursor->cursor);
}
}
}
static void seat_view_deco_leave(struct roots_seat_view *view) {
struct roots_cursor *cursor = view->seat->cursor;
wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
cursor->default_xcursor, cursor->cursor);
view->has_button_grab = false;
}
static void seat_view_deco_button(struct roots_seat_view *view, double sx,
double sy, uint32_t button, uint32_t state) {
if (button == BTN_LEFT && state == WLR_BUTTON_PRESSED) {
view->has_button_grab = true;
view->grab_sx = sx;
view->grab_sy = sy;
} else {
view->has_button_grab = false;
}
enum roots_deco_part parts = view_get_deco_part(view->view, sx, sy);
if (state == WLR_BUTTON_RELEASED && (parts & ROOTS_DECO_PART_TITLEBAR)) {
struct roots_cursor *cursor = view->seat->cursor;
wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
cursor->default_xcursor, cursor->cursor);
}
}
static void roots_passthrough_cursor(struct roots_cursor *cursor,
int64_t time) {
bool focus_changed;
double sx, sy;
struct roots_view *view = NULL;
struct roots_seat *seat = cursor->seat;
struct roots_desktop *desktop = seat->input->server->desktop;
struct wlr_surface *surface = desktop_surface_at(desktop,
cursor->cursor->x, cursor->cursor->y, &sx, &sy, &view);
struct wl_client *client = NULL;
if (surface) {
client = wl_resource_get_client(surface->resource);
}
if (surface && !roots_seat_allow_input(seat, surface->resource)) {
return;
}
if (cursor->cursor_client != client) {
wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
cursor->default_xcursor, cursor->cursor);
cursor->cursor_client = client;
}
if (view) {
struct roots_seat_view *seat_view =
roots_seat_view_from_view(seat, view);
if (cursor->pointer_view &&
!cursor->wlr_surface && (surface || seat_view != cursor->pointer_view)) {
seat_view_deco_leave(cursor->pointer_view);
}
cursor->pointer_view = seat_view;
if (!surface) {
seat_view_deco_motion(seat_view, sx, sy);
}
} else {
cursor->pointer_view = NULL;
}
cursor->wlr_surface = surface;
if (surface) {
focus_changed = (seat->seat->pointer_state.focused_surface != surface);
wlr_seat_pointer_notify_enter(seat->seat, surface, sx, sy);
if (!focus_changed && time > 0) {
wlr_seat_pointer_notify_motion(seat->seat, time, sx, sy);
}
} else {
wlr_seat_pointer_clear_focus(seat->seat);
}
struct roots_drag_icon *drag_icon;
wl_list_for_each(drag_icon, &seat->drag_icons, link) {
roots_drag_icon_update_position(drag_icon);
}
}
void roots_cursor_update_focus(struct roots_cursor *cursor) {
roots_passthrough_cursor(cursor, -1);
}
void roots_cursor_update_position(struct roots_cursor *cursor,
uint32_t time) {
struct roots_seat *seat = cursor->seat;
struct roots_view *view;
switch (cursor->mode) {
case ROOTS_CURSOR_PASSTHROUGH:
roots_passthrough_cursor(cursor, time);
break;
case ROOTS_CURSOR_MOVE:
view = roots_seat_get_focus(seat);
if (view != NULL) {
double dx = cursor->cursor->x - cursor->offs_x;
double dy = cursor->cursor->y - cursor->offs_y;
view_move(view, cursor->view_x + dx,
cursor->view_y + dy);
}
break;
case ROOTS_CURSOR_RESIZE:
view = roots_seat_get_focus(seat);
if (view != NULL) {
double dx = cursor->cursor->x - cursor->offs_x;
double dy = cursor->cursor->y - cursor->offs_y;
double x = view->x;
double y = view->y;
int width = cursor->view_width;
int height = cursor->view_height;
if (cursor->resize_edges & WLR_EDGE_TOP) {
y = cursor->view_y + dy;
height -= dy;
if (height < 1) {
y += height;
}
} else if (cursor->resize_edges & WLR_EDGE_BOTTOM) {
height += dy;
}
if (cursor->resize_edges & WLR_EDGE_LEFT) {
x = cursor->view_x + dx;
width -= dx;
if (width < 1) {
x += width;
}
} else if (cursor->resize_edges & WLR_EDGE_RIGHT) {
width += dx;
}
view_move_resize(view, x, y,
width < 1 ? 1 : width,
height < 1 ? 1 : height);
}
break;
case ROOTS_CURSOR_ROTATE:
view = roots_seat_get_focus(seat);
if (view != NULL) {
int ox = view->x + view->wlr_surface->current.width/2,
oy = view->y + view->wlr_surface->current.height/2;
int ux = cursor->offs_x - ox,
uy = cursor->offs_y - oy;
int vx = cursor->cursor->x - ox,
vy = cursor->cursor->y - oy;
float angle = atan2(ux*vy - uy*vx, vx*ux + vy*uy);
int steps = 12;
angle = round(angle/M_PI*steps) / (steps/M_PI);
view_rotate(view, cursor->view_rotation + angle);
}
break;
}
}
static void roots_cursor_press_button(struct roots_cursor *cursor,
struct wlr_input_device *device, uint32_t time, uint32_t button,
uint32_t state, double lx, double ly) {
struct roots_seat *seat = cursor->seat;
struct roots_desktop *desktop = seat->input->server->desktop;
bool is_touch = device->type == WLR_INPUT_DEVICE_TOUCH;
double sx, sy;
struct roots_view *view;
struct wlr_surface *surface = desktop_surface_at(desktop,
lx, ly, &sx, &sy, &view);
if (state == WLR_BUTTON_PRESSED && view &&
roots_seat_has_meta_pressed(seat)) {
roots_seat_set_focus(seat, view);
uint32_t edges;
switch (button) {
case BTN_LEFT:
roots_seat_begin_move(seat, view);
break;
case BTN_RIGHT:
edges = 0;
if (sx < view->wlr_surface->current.width/2) {
edges |= WLR_EDGE_LEFT;
} else {
edges |= WLR_EDGE_RIGHT;
}
if (sy < view->wlr_surface->current.height/2) {
edges |= WLR_EDGE_TOP;
} else {
edges |= WLR_EDGE_BOTTOM;
}
roots_seat_begin_resize(seat, view, edges);
break;
case BTN_MIDDLE:
roots_seat_begin_rotate(seat, view);
break;
}
} else {
if (view && !surface && cursor->pointer_view) {
seat_view_deco_button(cursor->pointer_view,
sx, sy, button, state);
}
if (state == WLR_BUTTON_RELEASED &&
cursor->mode != ROOTS_CURSOR_PASSTHROUGH) {
cursor->mode = ROOTS_CURSOR_PASSTHROUGH;
}
if (state == WLR_BUTTON_PRESSED) {
if (view) {
roots_seat_set_focus(seat, view);
}
if (surface && wlr_surface_is_layer_surface(surface)) {
struct wlr_layer_surface_v1 *layer =
wlr_layer_surface_v1_from_wlr_surface(surface);
if (layer->current.keyboard_interactive) {
roots_seat_set_focus_layer(seat, layer);
}
}
}
}
if (!is_touch) {
wlr_seat_pointer_notify_button(seat->seat, time, button, state);
}
}
void roots_cursor_handle_motion(struct roots_cursor *cursor,
struct wlr_event_pointer_motion *event) {
double dx = event->delta_x;
double dy = event->delta_y;
if (cursor->active_constraint) {
struct roots_view *view = cursor->pointer_view->view;
assert(view);
double center_x = view->x + view->width / 2.;
double center_y = view->y + view->height / 2.;
double lx1 = cursor->cursor->x;
double ly1 = cursor->cursor->y;
double lx2 = lx1 + dx;
double ly2 = ly1 + dy;
// Optimization for most common case.
// This also makes sure that we don't encounter
// precision bugs in the most common case.
if (view->rotation == 0.0) {
double sx1 = lx1 - view->x;
double sy1 = ly1 - view->y;
double sx2 = lx2 - view->x;
double sy2 = ly2 - view->y;
double sx2_confined, sy2_confined;
if (!wlr_region_confine(&cursor->confine, sx1, sy1, sx2, sy2, &sx2_confined, &sy2_confined)) {
return;
}
dx = sx2_confined - sx1;
dy = sy2_confined - sy1;
} else {
assert(false);
double c = cos(view->rotation);
double s = sin(view->rotation);
double sx1 = c * (lx1 - center_x) - s * (ly1 - center_y) + view->width / 2.;
double sy1 = s * (lx1 - center_x) + c * (ly1 - center_y) + view->height / 2.;
double sx2 = c * (lx2 - center_x) - s * (ly2 - center_y) + view->width / 2.;
double sy2 = s * (lx2 - center_x) + c * (ly2 - center_y) + view->height / 2.;
double sx2_confined, sy2_confined;
if (!wlr_region_confine(&cursor->confine, sx1, sy1, sx2, sy2, &sx2_confined, &sy2_confined)) {
return;
}
// avoid NaNs
double fraction = (sx2 - sx1) > (sy2 - sy1) ?
(sx2_confined - sx1) / (sx2 - sx1) :
(sy2_confined - sy1) / (sy2 - sy1);
dx *= fraction;
dy *= fraction;
}
}
wlr_cursor_move(cursor->cursor, event->device, dx, dy);
roots_cursor_update_position(cursor, event->time_msec);
}
void roots_cursor_handle_motion_absolute(struct roots_cursor *cursor,
struct wlr_event_pointer_motion_absolute *event) {
double lx, ly;
wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device, event->x,
event->y, &lx, &ly);
if (cursor->pointer_view) {
struct roots_view *view = cursor->pointer_view->view;
if (cursor->active_constraint &&
!pixman_region32_contains_point(&cursor->confine,
floor(lx - view->x), floor(ly - view->y), NULL)) {
return;
}
}
wlr_cursor_warp_closest(cursor->cursor, event->device, lx, ly);
roots_cursor_update_position(cursor, event->time_msec);
}
void roots_cursor_handle_button(struct roots_cursor *cursor,
struct wlr_event_pointer_button *event) {
roots_cursor_press_button(cursor, event->device, event->time_msec,
event->button, event->state, cursor->cursor->x, cursor->cursor->y);
}
void roots_cursor_handle_axis(struct roots_cursor *cursor,
struct wlr_event_pointer_axis *event) {
wlr_seat_pointer_notify_axis(cursor->seat->seat, event->time_msec,
event->orientation, event->delta, event->delta_discrete, event->source);
}
void roots_cursor_handle_touch_down(struct roots_cursor *cursor,
struct wlr_event_touch_down *event) {
struct roots_desktop *desktop = cursor->seat->input->server->desktop;
double lx, ly;
wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device,
event->x, event->y, &lx, &ly);
double sx, sy;
struct wlr_surface *surface = desktop_surface_at(
desktop, lx, ly, &sx, &sy, NULL);
uint32_t serial = 0;
if (surface && roots_seat_allow_input(cursor->seat, surface->resource)) {
serial = wlr_seat_touch_notify_down(cursor->seat->seat, surface,
event->time_msec, event->touch_id, sx, sy);
}
if (serial && wlr_seat_touch_num_points(cursor->seat->seat) == 1) {
cursor->seat->touch_id = event->touch_id;
cursor->seat->touch_x = lx;
cursor->seat->touch_y = ly;
roots_cursor_press_button(cursor, event->device, event->time_msec,
BTN_LEFT, 1, lx, ly);
}
}
void roots_cursor_handle_touch_up(struct roots_cursor *cursor,
struct wlr_event_touch_up *event) {
struct wlr_touch_point *point =
wlr_seat_touch_get_point(cursor->seat->seat, event->touch_id);
if (!point) {
return;
}
if (wlr_seat_touch_num_points(cursor->seat->seat) == 1) {
roots_cursor_press_button(cursor, event->device, event->time_msec,
BTN_LEFT, 0, cursor->seat->touch_x, cursor->seat->touch_y);
}
wlr_seat_touch_notify_up(cursor->seat->seat, event->time_msec,
event->touch_id);
}
void roots_cursor_handle_touch_motion(struct roots_cursor *cursor,
struct wlr_event_touch_motion *event) {
struct roots_desktop *desktop = cursor->seat->input->server->desktop;
struct wlr_touch_point *point =
wlr_seat_touch_get_point(cursor->seat->seat, event->touch_id);
if (!point) {
return;
}
double lx, ly;
wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device,
event->x, event->y, &lx, &ly);
double sx, sy;
struct wlr_surface *surface = desktop_surface_at(
desktop, lx, ly, &sx, &sy, NULL);
if (surface && roots_seat_allow_input(cursor->seat, surface->resource)) {
wlr_seat_touch_point_focus(cursor->seat->seat, surface,
event->time_msec, event->touch_id, sx, sy);
wlr_seat_touch_notify_motion(cursor->seat->seat, event->time_msec,
event->touch_id, sx, sy);
} else {
wlr_seat_touch_point_clear_focus(cursor->seat->seat, event->time_msec,
event->touch_id);
}
if (event->touch_id == cursor->seat->touch_id) {
cursor->seat->touch_x = lx;
cursor->seat->touch_y = ly;
}
}
void roots_cursor_handle_tool_axis(struct roots_cursor *cursor,
struct wlr_event_tablet_tool_axis *event) {
double x = NAN, y = NAN;
if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X) &&
(event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
x = event->x;
y = event->y;
} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) {
x = event->x;
} else if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) {
y = event->y;
}
double lx, ly;
wlr_cursor_absolute_to_layout_coords(cursor->cursor, event->device,
x, y, &lx, &ly);
if (cursor->pointer_view) {
struct roots_view *view = cursor->pointer_view->view;
if (cursor->active_constraint &&
!pixman_region32_contains_point(&cursor->confine,
floor(lx - view->x), floor(ly - view->y), NULL)) {
return;
}
}
wlr_cursor_warp_closest(cursor->cursor, event->device, lx, ly);
roots_cursor_update_position(cursor, event->time_msec);
}
void roots_cursor_handle_tool_tip(struct roots_cursor *cursor,
struct wlr_event_tablet_tool_tip *event) {
roots_cursor_press_button(cursor, event->device,
event->time_msec, BTN_LEFT, event->state, cursor->cursor->x,
cursor->cursor->y);
}
void roots_cursor_handle_request_set_cursor(struct roots_cursor *cursor,
struct wlr_seat_pointer_request_set_cursor_event *event) {
struct wlr_surface *focused_surface =
event->seat_client->seat->pointer_state.focused_surface;
bool has_focused =
focused_surface != NULL && focused_surface->resource != NULL;
struct wl_client *focused_client = NULL;
if (has_focused) {
focused_client = wl_resource_get_client(focused_surface->resource);
}
if (event->seat_client->client != focused_client ||
cursor->mode != ROOTS_CURSOR_PASSTHROUGH) {
wlr_log(WLR_DEBUG, "Denying request to set cursor from unfocused client");
return;
}
wlr_cursor_set_surface(cursor->cursor, event->surface, event->hotspot_x,
event->hotspot_y);
cursor->cursor_client = event->seat_client->client;
}
void roots_cursor_handle_focus_change(struct roots_cursor *cursor,
struct wlr_seat_pointer_focus_change_event *event) {
double sx = event->sx;
double sy = event->sy;
double lx = cursor->cursor->x;
double ly = cursor->cursor->y;
wlr_log(WLR_DEBUG, "entered surface %p, lx: %f, ly: %f, sx: %f, sy: %f",
event->new_surface, lx, ly, sx, sy);
roots_cursor_constrain(cursor,
wlr_pointer_constraints_v1_constraint_for_surface(
cursor->seat->input->server->desktop->pointer_constraints,
event->new_surface, cursor->seat->seat),
sx, sy);
}
void roots_cursor_handle_constraint_commit(struct roots_cursor *cursor) {
struct roots_desktop *desktop = cursor->seat->input->server->desktop;
struct roots_view *view;
double sx, sy;
struct wlr_surface *surface = desktop_surface_at(desktop,
cursor->cursor->x, cursor->cursor->y, &sx, &sy, &view);
// This should never happen but views move around right when they're
// created from (0, 0) to their actual coordinates.
if (surface != cursor->active_constraint->surface) {
roots_cursor_update_focus(cursor);
} else {
roots_cursor_constrain(cursor, cursor->active_constraint, sx, sy);
}
}
void roots_cursor_constrain(struct roots_cursor *cursor,
struct wlr_pointer_constraint_v1 *constraint, double sx, double sy) {
if (cursor->active_constraint != constraint) {
wlr_log(WLR_DEBUG, "roots_cursor_constrain(%p, %p)", cursor, constraint);
wlr_log(WLR_DEBUG, "cursor->active_constraint: %p", cursor->active_constraint);
if (cursor->active_constraint) {
wlr_pointer_constraint_v1_send_deactivated(cursor->active_constraint);
if (cursor->constraint_commit.link.next) {
wl_list_remove(&cursor->constraint_commit.link);
}
}
cursor->active_constraint = constraint;
if (!constraint) {
return;
}
wlr_pointer_constraint_v1_send_activated(constraint);
wl_signal_add(&constraint->surface->events.commit,
&cursor->constraint_commit);
} else if (constraint == NULL) {
return;
}
pixman_region32_clear(&cursor->confine);
pixman_region32_t *region = &constraint->region;
if (!pixman_region32_contains_point(region, floor(sx), floor(sy), NULL)) {
// Warp into region if possible
int nboxes;
pixman_box32_t *boxes = pixman_region32_rectangles(region, &nboxes);
if (nboxes > 0) {
struct roots_view *view = cursor->pointer_view->view;
double sx = (boxes[0].x1 + boxes[0].x2) / 2.;
double sy = (boxes[0].y1 + boxes[0].y2) / 2.;
double lx, ly;
if (view->rotation == 0.0) {
lx = sx + view->x;
ly = sy + view->y;
} else {
double c = cos(view->rotation);
double s = sin(view->rotation);
double center_x = view->width / 2.;
double center_y = view->height / 2.;
lx = c * (sx - center_x) - s * (sy - center_y) + center_x + view->x;
ly = s * (sx - center_x) + c * (sy - center_y) + center_y + view->y;
}
wlr_cursor_warp_closest(cursor->cursor, NULL, lx, ly);
}
}
// A locked pointer will result in an empty region, thus disallowing all movement
if (constraint->type == WLR_POINTER_CONSTRAINT_V1_CONFINED) {
pixman_region32_copy(&cursor->confine, region);
}
}