macosx_dialog_provider: Offer a way to render this API somewhat legit with libvlc.

Make the dialogs that requires no user action and that will be normally handled via regular error code path optionals.

Still, there is no context with those dialogs, and we don't know to what output they belongs, ideally we should have a proper API that makes the client a proxy for those user actions.

modules/gui/macosx_dialog_provider/dialogProvider.m

@@ -96,9 +96,14 @@ struct intf_sys_t
 
     vlc_mutex_t lock;
     vlc_cond_t wait;
+    bool is_hidding_noaction_dialogs;
 };
 
 
+#define T_HIDE_NOACTION N_("Hide no user action dialogs")
+#define LT_HIDE_NOACTION N_("Don't display dialogs that don't require user action (Critical and error panel).")
+
+#define prefix "macosx-dialog-provider"
 /*****************************************************************************
  * Module descriptor
  *****************************************************************************/
@@ -110,6 +115,13 @@ vlc_module_begin()
     add_shortcut("miosx")
     set_description("Minimal Mac OS X Dialog Provider")
     set_capability("interface", 0)
+
+    /* This setting is interesting, because when used with a libvlc app
+     * it's almost certain that the client program will display error by
+     * itself. Moreover certain action might end up in an error, but 
+     * the client wants to ignored them completely. */
+    add_bool(prefix "hide-no-user-action-dialogs", true, NULL, T_HIDE_NOACTION, LT_HIDE_NOACTION, false)
+
     set_callbacks(OpenIntf, CloseIntf)
     set_category(CAT_INTERFACE)
     set_subcategory(SUBCAT_INTERFACE_MAIN)
@@ -130,11 +142,18 @@ int OpenIntf(vlc_object_t *p_this)
 
     p_intf->p_sys->displayer = [[VLCDialogDisplayer alloc] init];
 
+    bool hide = var_CreateGetBool(p_intf, prefix "hide-no-user-action-dialogs");
+    p_intf->p_sys->is_hidding_noaction_dialogs = hide;
+
     /* subscribe to various interactive dialogues */
+    
+    if (!hide)
+    {
         var_Create(p_intf,"dialog-error",VLC_VAR_ADDRESS);
         var_AddCallback(p_intf,"dialog-error",DisplayError,p_intf);
         var_Create(p_intf,"dialog-critical",VLC_VAR_ADDRESS);
         var_AddCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);        
+    }
     var_Create(p_intf,"dialog-login",VLC_VAR_ADDRESS);
     var_AddCallback(p_intf,"dialog-login",DisplayLogin,p_intf);
     var_Create(p_intf,"dialog-question",VLC_VAR_ADDRESS);
@@ -157,8 +176,12 @@ void CloseIntf(vlc_object_t *p_this)
 
     /* unsubscribe from the interactive dialogues */
     dialog_Unregister(p_intf);
+    
+    if (!p_intf->p_sys->is_hidding_noaction_dialogs)
+    {
         var_DelCallback(p_intf,"dialog-error",DisplayError,p_intf);
         var_DelCallback(p_intf,"dialog-critical",DisplayCritical,p_intf);
+    }
     var_DelCallback(p_intf,"dialog-login",DisplayLogin,p_intf);
     var_DelCallback(p_intf,"dialog-question",DisplayQuestion,p_intf);
     var_DelCallback(p_intf,"dialog-progress-bar",DisplayProgressPanelAction,p_intf);