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Wayland: support move/resize of subwindow independently from parent (#1003)

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This commit is contained in:
ManoloFLTK 2024-07-14 13:24:28 +02:00
parent ee05d4bd3a
commit fd257a7bf3
1 changed files with 77 additions and 15 deletions
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68
src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
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@ -1771,7 +1771,36 @@ int Fl_Wayland_Window_Driver::set_cursor_4args(const Fl_RGB_Image *rgb, int hotx
}
struct xid_and_rect {
struct wld_window *xid;
Fl_Window *win;
int X, Y, W, H;
bool need_resize;
};
static void surface_frame_done(void *data, struct wl_callback *cb, uint32_t time) {
struct xid_and_rect *xid_rect = (xid_and_rect *)data;
wl_callback_destroy(cb);
xid_rect->xid->frame_cb = NULL;
if (xid_rect->need_resize) {
xid_rect->win->Fl_Group::resize(xid_rect->X, xid_rect->Y, xid_rect->W, xid_rect->H);
xid_rect->win->redraw();
} else {
xid_rect->win->Fl_Widget::resize(xid_rect->X, xid_rect->Y, xid_rect->W, xid_rect->H);
wl_surface_commit(xid_rect->xid->wl_surface);
}
delete xid_rect;
}
static const struct wl_callback_listener surface_frame_listener = {
.done = surface_frame_done,
};
void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
static int depth = 0;
struct wld_window *fl_win = fl_wl_xid(pWindow);
if (fl_win && fl_win->kind == DECORATED && !xdg_toplevel()) {
pWindow->wait_for_expose();
@ -1789,9 +1818,20 @@ void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
int is_a_resize = (W != w() || H != h() || true_rescale);
if (is_a_move) force_position(1);
else if (!is_a_resize && !is_a_move) return;
depth++;
if (shown() && !(parent() || popup_window())) {
X = Y = 0;
}
struct wld_window *parent_xid = parent() ? fl_wl_xid(pWindow->window()) : NULL;
xid_and_rect *xid_rect = NULL;
if (parent_xid && parent_xid->frame_cb && wl_proxy_get_listener((struct wl_proxy*)parent_xid->frame_cb) == &surface_frame_listener) {
xid_rect = (xid_and_rect*)wl_callback_get_user_data(parent_xid->frame_cb);
if (xid_rect->win != pWindow) xid_rect = NULL;
}
// When moving or resizing a non-GL subwindow independently from its parent, this condition
// delays application of X,Y,W,H values until the compositor signals
// it's ready for a new frame using the frame callback mechanism.
if (depth > 1 || pWindow->as_gl_window() || !parent_xid || wait_for_expose_value || (parent_xid->frame_cb && !xid_rect)) {
if (is_a_resize) {
if (pWindow->parent()) {
if (W < 1) W = 1;
@ -1804,6 +1844,7 @@ void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
x(X); y(Y);
//fprintf(stderr, "move win=%p to %dx%d\n", pWindow, X, Y);
}
}
if (shown()) {
if (is_a_resize) {
@ -1860,14 +1901,35 @@ void Fl_Wayland_Window_Driver::resize(int X, int Y, int W, int H) {
}
}
struct wld_window *parent_xid = parent() ? fl_wl_xid(pWindow->window()) : NULL;
if (fl_win && parent_xid) {
if (pWindow->as_gl_window() && fl_win->frame_cb) {
if (pWindow->as_gl_window()) {
if (fl_win->frame_cb) {
wl_callback_destroy(fl_win->frame_cb);
fl_win->frame_cb = NULL;
} else wl_surface_commit(parent_xid->wl_surface);
}
Fl_Wayland_Graphics_Driver::buffer_commit(parent_xid);
} else {
if (!parent_xid->frame_cb) {
// use the frame callback mechanism and memorize current X,Y,W,H values
xid_rect = new xid_and_rect;
xid_rect->xid = parent_xid;
xid_rect->win = pWindow;
parent_xid->frame_cb = wl_surface_frame(parent_xid->wl_surface);
wl_callback_add_listener(parent_xid->frame_cb, &surface_frame_listener, xid_rect);
xid_rect->X = X; xid_rect->Y = Y; xid_rect->W = W; xid_rect->H = H;
xid_rect->need_resize = is_a_resize;
wl_surface_commit(parent_xid->wl_surface);
} else if (xid_rect) {
// update the active frame callback with new X,Y,W,H values
xid_rect->X = X; xid_rect->Y = Y; xid_rect->W = W; xid_rect->H = H;
xid_rect->need_resize |= is_a_resize;
} else {
wl_surface_commit(parent_xid->wl_surface);
}
}
checkSubwindowFrame(); // make sure subwindow doesn't leak outside parent
}
depth--;
}