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view: Tidy up view->output/view->fullscreen redundancy

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A fullscreen view currently has its output specified twice by:
  - struct output *output
  - struct wlr_output *fullscreen

view->fullscreen may also become a dangling pointer if the output is
disconnected, because view_on_output_destroy() clears view->output but
not view->fullscreen.

To eliminate the redundancy and the dangling pointer, let's change
view->fullscreen to a Boolean and rely on view->output to specify the
output.

Along the way, change a few related usages of struct wlr_output to
struct output as well.

No functional change intended.

v2: Don't allow entering fullscreen on disabled output (makes
    conditions for entering/leaving fullscreen symmetric)
v3: Use output_is_usable() helper
This commit is contained in:
John Lindgren 2023-02-15 02:12:22 -05:00
parent 6efc6a9db4
commit 49c9466039
3 changed files with 44 additions and 47 deletions
Download patch file Download diff file Expand all files Collapse all files

78
src/view.c
View file

@ -221,9 +221,9 @@ view_minimize(struct view *view, bool minimized)
}
}
/* view_wlr_output - return the output that a view is mostly on */
static struct wlr_output *
view_wlr_output(struct view *view)
/* view_output - return the output that a view is mostly on */
static struct output *
view_output(struct view *view)
{
assert(view);
double closest_x, closest_y;
@ -234,13 +234,6 @@ view_wlr_output(struct view *view)
&closest_x, &closest_y);
wlr_output = wlr_output_layout_output_at(view->server->output_layout,
closest_x, closest_y);
return wlr_output;
}
static struct output *
view_output(struct view *view)
{
struct wlr_output *wlr_output = view_wlr_output(view);
return output_from_wlr_output(view->server, wlr_output);
}
@ -442,16 +435,17 @@ view_apply_tiled_geometry(struct view *view, struct output *output)
}
static void
view_apply_fullscreen_geometry(struct view *view, struct wlr_output *wlr_output)
view_apply_fullscreen_geometry(struct view *view)
{
assert(wlr_output);
struct output *output =
output_from_wlr_output(view->server, wlr_output);
assert(view->fullscreen);
assert(output_is_usable(view->output));
struct wlr_box box = { 0 };
wlr_output_effective_resolution(wlr_output, &box.width, &box.height);
wlr_output_effective_resolution(view->output->wlr_output,
&box.width, &box.height);
double ox = 0, oy = 0;
wlr_output_layout_output_coords(output->server->output_layout,
output->wlr_output, &ox, &oy);
wlr_output_layout_output_coords(view->server->output_layout,
view->output->wlr_output, &ox, &oy);
box.x -= ox;
box.y -= oy;
view_move_resize(view, box);
@ -679,16 +673,15 @@ view_toggle_fullscreen(struct view *view)
}
void
view_set_fullscreen(struct view *view, bool fullscreen,
struct wlr_output *wlr_output)
view_set_fullscreen(struct view *view, bool fullscreen, struct output *output)
{
assert(view);
if (fullscreen != !view->fullscreen) {
if (fullscreen == view->fullscreen) {
return;
}
if (!wlr_output) {
wlr_output = view_wlr_output(view);
if (!wlr_output && fullscreen) {
if (fullscreen && !output_is_usable(output)) {
output = view_output(view);
if (!output_is_usable(output)) {
/* Prevent fullscreen with no available outputs */
return;
}
@ -713,8 +706,9 @@ view_set_fullscreen(struct view *view, bool fullscreen,
if (view->ssd_enabled) {
undecorate(view);
}
view->fullscreen = wlr_output;
view_apply_fullscreen_geometry(view, view->fullscreen);
view->fullscreen = true;
view->output = output;
view_apply_fullscreen_geometry(view);
} else {
view->fullscreen = false;
/* Re-show decorations when no longer fullscreen */
@ -728,32 +722,29 @@ view_set_fullscreen(struct view *view, bool fullscreen,
}
/* Show fullscreen views above top-layer */
struct output *output =
output_from_wlr_output(view->server, wlr_output);
if (!output) {
return;
if (view->output) {
uint32_t top = ZWLR_LAYER_SHELL_V1_LAYER_TOP;
wlr_scene_node_set_enabled(&view->output->layer_tree[top]->node,
!fullscreen);
}
uint32_t top = ZWLR_LAYER_SHELL_V1_LAYER_TOP;
wlr_scene_node_set_enabled(&output->layer_tree[top]->node, !fullscreen);
}
void
view_adjust_for_layout_change(struct view *view)
{
assert(view);
struct wlr_output_layout *layout = view->server->output_layout;
if (view->fullscreen) {
if (wlr_output_layout_get(layout, view->fullscreen)) {
if (output_is_usable(view->output)) {
/* recompute fullscreen geometry */
view_apply_fullscreen_geometry(view, view->fullscreen);
view_apply_fullscreen_geometry(view);
} else {
/* output is gone, exit fullscreen */
view_set_fullscreen(view, false, NULL);
}
} else if (!view_apply_special_geometry(view)) {
/* reposition view if it's offscreen */
if (!wlr_output_layout_intersects(layout, NULL,
&view->pending)) {
if (!wlr_output_layout_intersects(view->server->output_layout,
NULL, &view->pending)) {
view_center(view);
}
}
@ -771,7 +762,13 @@ void
view_discover_output(struct view *view)
{
assert(view);
view->output = view_output(view);
/*
* Fullscreen views are tied to a particular output so don't
* auto-discover output for them.
*/
if (!view->fullscreen) {
view->output = view_output(view);
}
}
void
@ -1052,11 +1049,10 @@ view_destroy(struct view *view)
* in fullscreen mode, so if that's the case, we have to re-enable it
* here.
*/
if (view->fullscreen) {
struct output *output =
output_from_wlr_output(server, view->fullscreen);
if (view->fullscreen && view->output) {
uint32_t top = ZWLR_LAYER_SHELL_V1_LAYER_TOP;
wlr_scene_node_set_enabled(&output->layer_tree[top]->node, true);
wlr_scene_node_set_enabled(&view->output->layer_tree[top]->node,
true);
}
/* If we spawned a window menu, close it */