On Thu, 31 Jul 2014 15:36:40 +0200
Manuel Bachmann <[email protected]> wrote:

> This fixes the following :
> - if a surface was set fullscreen, and then minimized,
> the fullscreen compositor state would stay on and display
> a black screen ;
> - if a surface was set fullscreen, and we would then
> cycle between surfaces (with Mod+Tab e.g.), the fullscreen
> compositor state would stay on, and the fullscreen layer
> would sometimes hide surfaces positioned behind it ;
> - style and functional polishing, remove dead code.

Hi,

sounds like this should really be three separate patches, as the commit
message is a list of three things. ;-)
Or would separating produce just useless churn?

shell.c patches are hard to review to begin with, so I'd appreciate if
each patch did one thing and nothing more.

> - if a surface was set fullscreen, and we would then
> cycle between surfaces (with Mod+Tab e.g.), the fullscreen
> compositor state would stay on, and the fullscreen layer
> would sometimes hide surfaces positioned behind it ;

Hmm, are you sure this is a bug? What I see happening, when a
fullscreen surface is on top and another window is below it, and I
press Mod+tab, is that the fullscreen window does stay on top, but it
becomes almost transparent, so I can still see which window would be
raised if I released Mod+tab now. To me it looks like it is intentional
to not change the stacking order until releasing Mod+tab.

More comments below.

> 
> Signed-off-by: Manuel Bachmann <[email protected]>
> ---
>  desktop-shell/shell.c |   67 
> ++++++++++++++++++++++++++++---------------------
>  1 file changed, 38 insertions(+), 29 deletions(-)
> 
> diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
> index 3c3649c..60639cc 100644
> --- a/desktop-shell/shell.c
> +++ b/desktop-shell/shell.c
> @@ -2510,13 +2510,14 @@ unset_maximized(struct shell_surface *shsurf)
>  }
>  
>  static void
> -set_minimized(struct weston_surface *surface, uint32_t is_true)
> +set_minimized(struct weston_surface *surface)
>  {
> +     struct weston_view *view;
>       struct shell_surface *shsurf;
> -     struct workspace *current_ws;
> +     struct workspace *ws;
>       struct weston_seat *seat;
>       struct weston_surface *focus;
> -     struct weston_view *view;
> +     float x,y;
>  
>       view = get_default_view(surface);
>       if (!view)
> @@ -2525,34 +2526,31 @@ set_minimized(struct weston_surface *surface, 
> uint32_t is_true)
>       assert(weston_surface_get_main_surface(view->surface) == view->surface);
>  
>       shsurf = get_shell_surface(surface);
> -     current_ws = get_current_workspace(shsurf->shell);
> +     ws = get_current_workspace(shsurf->shell);
>  
> -     weston_layer_entry_remove(&view->layer_link);
> -      /* hide or show, depending on the state */
> -     if (is_true) {
> -             
> weston_layer_entry_insert(&shsurf->shell->minimized_layer.view_list, 
> &view->layer_link);
> -
> -             drop_focus_state(shsurf->shell, current_ws, view->surface);
> -             wl_list_for_each(seat, &shsurf->shell->compositor->seat_list, 
> link) {
> -                     if (!seat->keyboard)
> -                             continue;
> -                     focus = 
> weston_surface_get_main_surface(seat->keyboard->focus);
> -                     if (focus == view->surface)
> -                             weston_keyboard_set_focus(seat->keyboard, NULL);
> -             }
> +     /* if the surface is fullscreen, unset the global fullscreen state,
> +      * but keep the surface centered on its previous output.
> +      */
> +     if (shsurf->state.fullscreen) {
> +             x = shsurf->view->geometry.x;
> +             y = shsurf->view->geometry.y;
> +             unset_fullscreen(shsurf);
> +             weston_view_set_position(shsurf->view, x, y);

This seems slightly strange, doesn't unset_fullscreen() cause you to
lose some bits of the fullscreen state, meaning you cannot restore it
properly later? The framerate for instance?

>       }
> -     else {
> -             weston_layer_entry_insert(&current_ws->layer.view_list, 
> &view->layer_link);
>  
> -             wl_list_for_each(seat, &shsurf->shell->compositor->seat_list, 
> link) {
> -                     if (!seat->keyboard)
> -                             continue;
> -                     activate(shsurf->shell, view->surface, seat, true);
> -             }
> +     weston_layer_entry_remove(&view->layer_link);
> +     weston_layer_entry_insert(&shsurf->shell->minimized_layer.view_list, 
> &view->layer_link);
> +
> +     drop_focus_state(shsurf->shell, ws, view->surface);
> +     wl_list_for_each(seat, &shsurf->shell->compositor->seat_list, link) {
> +             if (!seat->keyboard)
> +                     continue;
> +             focus = weston_surface_get_main_surface(seat->keyboard->focus);
> +             if (focus == view->surface)
> +                     weston_keyboard_set_focus(seat->keyboard, NULL);
>       }
>  
>       shell_surface_update_child_surface_layers(shsurf);
> -
>       weston_view_damage_below(view);
>  }
>  
> @@ -3534,8 +3532,7 @@ xdg_surface_set_minimized(struct wl_client *client,
>       if (shsurf->type != SHELL_SURFACE_TOPLEVEL)
>               return;
>  
> -      /* apply compositor's own minimization logic (hide) */
> -     set_minimized(shsurf->surface, 1);
> +     set_minimized(shsurf->surface);
>  }
>  
>  static const struct xdg_surface_interface xdg_surface_implementation = {
> @@ -5444,12 +5441,24 @@ struct switcher {
>  static void
>  switcher_next(struct switcher *switcher)
>  {
> +     struct focus_state *state;
> +     struct weston_surface *surface;
>       struct weston_view *view;
>       struct weston_surface *first = NULL, *prev = NULL, *next = NULL;
>       struct shell_surface *shsurf;
>       struct workspace *ws = get_current_workspace(switcher->shell);
>  
> -      /* temporary re-display minimized surfaces */
> +     /* if the focused surface is fullscreen, minimize it */
> +     wl_list_for_each(state, &ws->focus_list, link) {
> +             if (state->keyboard_focus) {
> +                     surface = 
> weston_surface_get_main_surface(state->keyboard_focus);
> +                     shsurf = get_shell_surface(surface);
> +                     if (shsurf->state.fullscreen)
> +                             set_minimized(surface);
> +             }
> +     }

Err, can you explain what happens here and why?

Do we have a concept of a fullscreen surface being shown while not
being top-most or active? That is, is it expected to force-minimize a
fullscreen window when it is not... top-most? Regardless whether it was
minimized or not.

> +
> +     /* temporarily display minimized surfaces again */
>       struct weston_view *tmp;
>       struct weston_view **minimized;
>       wl_list_for_each_safe(view, tmp, 
> &switcher->shell->minimized_layer.view_list.link, layer_link.link) {
> @@ -5495,7 +5504,7 @@ switcher_next(struct switcher *switcher)
>               view->alpha = 1.0;
>  
>       shsurf = get_shell_surface(switcher->current);
> -     if (shsurf && shsurf->state.fullscreen)
> +     if (shsurf && shsurf->state.fullscreen && shsurf->fullscreen.black_view)
>               shsurf->fullscreen.black_view->alpha = 1.0;
>  }
>  

Sorry, I'm quite confused by these parts of shell.c.


Thanks,
pq
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