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cursor: Factor out cursor_update_common() and fix some glitches

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Fix a couple of glitches seen when exiting interactive move/resize:

 - Cursor briefly set to left_ptr rather than the correct cursor image
 - Cursor not updated if the view being moved/resized is destroyed

Also make sure to exit interactive mode if the view is going fullscreen
(labwc gets very confused otherwise).

Code changes in detail:

 - Factor out set_server_cursor() which will set the correct cursor
   image for non-client areas (either XCURSOR_DEFAULT or one of the
   resize cursors).
 - Unify the logic from cursor_rebase() and process_cursor_motion by
   factoring out cursor_update_common().  This corrects some logic
   discrepancies between the two, which should be a good thing(TM).
 - Remove the extra cursor_set(XCURSOR_DEFAULT) from interactive_end()
   and instead rely on cursor_update_focus() to do the right thing.
 - Simplify cursor_button() by just calling interactive_end() when we
   want to exit interactive mode.
 - Call cursor_update_focus() from view_destroy() if the view had mouse
   focus or was being interactively moved/resized.

v2: Eliminate force_reenter parameters and figure out automatically
    when we need to re-enter the surface.
v3: Rename wlseat -> wlr_seat.
v4: Simplify client/server cursor logic.
This commit is contained in:
John Lindgren 2022-09-12 13:14:18 -04:00
parent 4ba59f7074
commit 6c6e406507
6 changed files with 129 additions and 167 deletions
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254
src/cursor.c
View file

@ -14,10 +14,6 @@
#include "common/scene-helpers.h"
#include "common/zfree.h"
/* Used to prevent setting the same cursor image twice */
static char *last_cursor_image = NULL;
static const struct cursor_alias {
const char *name, *alias;
} cursor_aliases[] = {
@ -49,52 +45,6 @@ is_surface(enum ssd_part_type view_area)
;
}
/*
* cursor_rebase() for internal use: reuses node, surface, sx and sy
* For a public variant use cursor_update_focus()
*/
static void
cursor_rebase(struct seat *seat, struct wlr_scene_node *node,
struct wlr_surface *surface, double sx, double sy, uint32_t time_msec,
bool force)
{
if (seat->pressed.surface && surface != seat->pressed.surface) {
/* Don't leave surface when a button was pressed over another surface */
return;
}
if (seat->server->input_mode != LAB_INPUT_STATE_PASSTHROUGH) {
/* Prevent resetting focus / cursor image when moving or resizing */
return;
}
struct wlr_surface *focused_surface =
seat->seat->pointer_state.focused_surface;
if (surface) {
if (!force && surface == focused_surface) {
/*
* Usually we prevent re-entering an already focused surface
* because it sends useless leave and enter events.
*
* They may also seriously confuse clients if sent between
* connected events like a double click (#258) or fast scroll
* events caused by a touchpad (#225).
*
* If we just want to update the cursor image though
* the @force argument may be used to allow re-entering.
*/
return;
}
wlr_seat_pointer_notify_clear_focus(seat->seat);
wlr_seat_pointer_notify_enter(seat->seat, surface, sx, sy);
wlr_seat_pointer_notify_motion(seat->seat, time_msec, sx, sy);
} else if (focused_surface) {
cursor_set(seat, XCURSOR_DEFAULT);
wlr_seat_pointer_notify_clear_focus(seat->seat);
}
}
static void
request_cursor_notify(struct wl_listener *listener, void *data)
{
@ -127,10 +77,6 @@ request_cursor_notify(struct wl_listener *listener, void *data)
wlr_cursor_set_surface(seat->cursor, event->surface,
event->hotspot_x, event->hotspot_y);
if (last_cursor_image) {
zfree(last_cursor_image);
}
}
}
@ -250,16 +196,26 @@ cursor_set(struct seat *seat, const char *cursor_name)
}
/* Prevent setting the same cursor image twice */
if (last_cursor_image) {
if (!strcmp(last_cursor_image, cursor_name)) {
return;
}
free(last_cursor_image);
if (seat->cursor_set_by_server && !strcmp(cursor_name,
seat->cursor_set_by_server)) {
return;
}
last_cursor_image = strdup(cursor_name);
wlr_xcursor_manager_set_cursor_image(
seat->xcursor_manager, cursor_name, seat->cursor);
zfree(seat->cursor_set_by_server);
seat->cursor_set_by_server = strdup(cursor_name);
}
static void
set_server_cursor(struct seat *seat, enum ssd_part_type view_area)
{
uint32_t resize_edges = ssd_resize_edges(view_area);
if (resize_edges) {
cursor_set(seat, wlr_xcursor_get_resize_name(resize_edges));
} else {
cursor_set(seat, XCURSOR_DEFAULT);
}
}
bool
@ -307,11 +263,86 @@ process_cursor_motion_out_of_surface(struct server *server, uint32_t time)
wlr_seat_pointer_notify_motion(server->seat.seat, time, sx, sy);
}
/*
* Common logic shared by cursor_update_focus() and process_cursor_motion()
*/
static void
cursor_update_common(struct server *server, struct wlr_scene_node *node,
struct wlr_surface *surface, double sx, double sy,
enum ssd_part_type view_area, uint32_t time_msec,
bool cursor_has_moved)
{
struct seat *seat = &server->seat;
struct wlr_seat *wlr_seat = seat->seat;
ssd_update_button_hover(node, &server->ssd_hover_state);
if (server->input_mode != LAB_INPUT_STATE_PASSTHROUGH) {
/*
* Prevent updating focus/cursor image during
* interactive move/resize
*/
return;
}
/* TODO: verify drag_icon logic */
if (seat->pressed.surface && surface != seat->pressed.surface
&& !seat->drag_icon) {
if (cursor_has_moved) {
/*
* Button has been pressed while over another
* surface and is still held down. Just send
* the motion events to the focused surface so
* we can keep scrolling or selecting text even
* if the cursor moves outside of the surface.
*/
process_cursor_motion_out_of_surface(server, time_msec);
}
return;
}
if (surface && !input_inhibit_blocks_surface(seat, surface->resource)) {
/*
* Cursor is over an input-enabled client surface. The
* cursor image will be set by request_cursor_notify()
* in response to the enter event.
*/
if (surface != wlr_seat->pointer_state.focused_surface
|| seat->cursor_set_by_server) {
/*
* Enter the surface if necessary. Usually we
* prevent re-entering an already focused
* surface, because the extra leave and enter
* events can confuse clients (e.g. break
* double-click detection).
*
* We do however send a leave/enter event pair
* if a server-side cursor was set and we need
* to trigger a cursor image update.
*/
wlr_seat_pointer_notify_clear_focus(wlr_seat);
wlr_seat_pointer_notify_enter(wlr_seat, surface,
sx, sy);
zfree(seat->cursor_set_by_server);
}
if (cursor_has_moved) {
wlr_seat_pointer_notify_motion(wlr_seat, time_msec,
sx, sy);
}
} else {
/*
* Cursor is over a server (labwc) surface. Clear focus
* from the focused client (if any, no-op otherwise) and
* set the cursor image ourselves.
*/
wlr_seat_pointer_notify_clear_focus(wlr_seat);
set_server_cursor(seat, view_area);
}
}
static void
process_cursor_motion(struct server *server, uint32_t time)
{
static bool cursor_name_set_by_server;
/* If the mode is non-passthrough, delegate to those functions. */
if (server->input_mode == LAB_INPUT_STATE_MOVE) {
process_cursor_move(server, time);
@ -323,7 +354,6 @@ process_cursor_motion(struct server *server, uint32_t time)
/* Otherwise, find view under the pointer and send the event along */
double sx, sy;
struct wlr_seat *wlr_seat = server->seat.seat;
struct wlr_scene_node *node;
enum ssd_part_type view_area = LAB_SSD_NONE;
struct view *view = desktop_node_and_view_at(server,
@ -335,29 +365,9 @@ process_cursor_motion(struct server *server, uint32_t time)
surface = lab_wlr_surface_from_node(node);
}
/* resize handles */
uint32_t resize_edges = ssd_resize_edges(view_area);
/* Set cursor */
if (view_area == LAB_SSD_ROOT || view_area == LAB_SSD_MENU) {
cursor_set(&server->seat, XCURSOR_DEFAULT);
} else if (resize_edges) {
cursor_name_set_by_server = true;
cursor_set(&server->seat,
wlr_xcursor_get_resize_name(resize_edges));
} else if (ssd_part_contains(LAB_SSD_PART_TITLEBAR, view_area)) {
/* title and buttons */
cursor_set(&server->seat, XCURSOR_DEFAULT);
cursor_name_set_by_server = true;
} else if (cursor_name_set_by_server) {
/* xdg/xwindow window content */
/* layershell or unmanaged */
cursor_set(&server->seat, XCURSOR_DEFAULT);
cursor_name_set_by_server = false;
}
if (view_area == LAB_SSD_MENU) {
menu_process_cursor_motion(node);
set_server_cursor(&server->seat, view_area);
return;
}
@ -373,6 +383,7 @@ process_cursor_motion(struct server *server, uint32_t time)
if (mousebind->mouse_event == MOUSE_ACTION_DRAG
&& mousebind->pressed_in_context) {
/* Find closest resize edges in case action is Resize */
uint32_t resize_edges = ssd_resize_edges(view_area);
if (view && !resize_edges) {
resize_edges |= server->seat.cursor->x
< view->x + view->w / 2 ? WLR_EDGE_LEFT
@ -387,50 +398,8 @@ process_cursor_motion(struct server *server, uint32_t time)
}
}
/* TODO: ssd_hover_state should likely be located in server->seat */
ssd_update_button_hover(node, &server->ssd_hover_state);
if (server->seat.pressed.surface &&
server->seat.pressed.surface != surface &&
!server->seat.drag_icon) {
/*
* Button has been pressed while over another surface
* and is still held down. Just send the adjusted motion
* events to the focused surface so we can keep scrolling
* or selecting text even if the cursor moves outside of
* the surface.
*/
process_cursor_motion_out_of_surface(server, time);
} else if (surface && !input_inhibit_blocks_surface(
&server->seat, surface->resource)) {
bool focus_changed =
wlr_seat->pointer_state.focused_surface != surface;
/*
* "Enter" the surface if necessary. This lets the client know
* that the cursor has entered one of its surfaces.
*
* Note that this gives the surface "pointer focus", which is
* distinct from keyboard focus. You get pointer focus by moving
* the pointer over a window.
*/
wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
if (!focus_changed || server->seat.drag_icon) {
/*
* The enter event contains coordinates, so we only need
* to notify on motion if the focus did not change.
*/
wlr_seat_pointer_notify_motion(wlr_seat, time, sx, sy);
}
} else {
/*
* Clear pointer focus so future button events and such are not
* sent to the last client to have the cursor over it.
*
* Except if we started pressing a button on the last client and
* are not currently in drag and drop mode.
*/
wlr_seat_pointer_clear_focus(wlr_seat);
}
cursor_update_common(server, node, surface, sx, sy, view_area, time,
/*cursor_has_moved*/ true);
}
static uint32_t
@ -440,7 +409,7 @@ msec(const struct timespec *t)
}
void
cursor_update_focus(struct server *server, bool force_reenter)
cursor_update_focus(struct server *server)
{
double sx, sy;
struct wlr_scene_node *node = NULL;
@ -458,10 +427,9 @@ cursor_update_focus(struct server *server, bool force_reenter)
surface = lab_wlr_surface_from_node(node);
}
ssd_update_button_hover(node, &seat->server->ssd_hover_state);
/* Focus surface under cursor if it isn't already focused */
cursor_rebase(seat, node, surface, sx, sy, msec(&now), force_reenter);
cursor_update_common(server, node, surface, sx, sy, view_area,
msec(&now), /*cursor_has_moved*/ false);
}
void
@ -830,27 +798,15 @@ cursor_button(struct wl_listener *listener, void *data)
if (server->input_mode == LAB_INPUT_STATE_MENU) {
if (close_menu) {
menu_close_root(server);
cursor_rebase(&server->seat, node, surface, sx, sy,
event->time_msec, false);
cursor_update_common(server, node, surface, sx, sy,
view_area, event->time_msec, false);
close_menu = false;
}
return;
}
if (server->input_mode != LAB_INPUT_STATE_PASSTHROUGH) {
/* Exit interactive move/resize/menu mode. */
if (server->grabbed_view == view) {
interactive_end(view);
} else {
server->input_mode = LAB_INPUT_STATE_PASSTHROUGH;
server->grabbed_view = NULL;
}
/*
* Focus surface under cursor and force updating the
* cursor icon
*/
cursor_rebase(&server->seat, node, surface, sx, sy,
event->time_msec, true);
/* Exit interactive move/resize mode */
interactive_end(server->grabbed_view);
return;
}
goto mousebindings;
@ -923,7 +879,7 @@ cursor_axis(struct wl_listener *listener, void *data)
wlr_idle_notify_activity(seat->wlr_idle, seat->seat);
/* Make sure we are sending the events to the surface under the cursor */
cursor_update_focus(seat->server, false);
cursor_update_focus(seat->server);
/* Notify the client with pointer focus of the axis event. */
wlr_seat_pointer_notify_axis(seat->seat, event->time_msec,