FS#11925 - Add a proper system to keep track of the current screen/activity to make %cs far more useful

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29944 a1c6a512-1295-4272-9138-f99709370657

11 files changed, 70 insertions, 41 deletions

diff --git a/apps/gui/option_select.c b/apps/gui/option_select.c
index f954268c18..7f829d26c3 100644
--- a/apps/gui/option_select.c
+++ b/apps/gui/option_select.c
@@ -486,6 +486,7 @@ bool option_screen(const struct settings_list *setting,
         temp_var = oldvalue = *(bool*)setting->setting?1:0;
     }
     else return false; /* only int/bools can go here */
+    push_current_activity(ACTIVITY_OPTIONSELECT);
     gui_synclist_init(&lists, value_setting_get_name_cb,
                       (void*)setting, false, 1, parent);
     if (setting->lang_id == -1)
@@ -566,6 +567,7 @@ bool option_screen(const struct settings_list *setting,
         if (function == sound_get_fn(SOUND_VOLUME))
             global_status.last_volume_change = current_tick;
     }
+    pop_current_activity();
     return false;
 }
 
diff --git a/apps/gui/quickscreen.c b/apps/gui/quickscreen.c
index f03043d611..3922c94c4b 100644
--- a/apps/gui/quickscreen.c
+++ b/apps/gui/quickscreen.c
@@ -317,6 +317,9 @@ static bool gui_syncquickscreen_run(struct gui_quickscreen * qs, int button_ente
      *  - an action taken while pressing the enter button,
      *    then release the enter button*/
     bool can_quit = false;
+    
+    push_current_activity(ACTIVITY_QUICKSCREEN);
+    
     FOR_NB_SCREENS(i)
     {
         screens[i].set_viewport(NULL);
@@ -369,6 +372,7 @@ static bool gui_syncquickscreen_run(struct gui_quickscreen * qs, int button_ente
         viewportmanager_theme_undo(i, true);
     }
 
+    pop_current_activity();
     return changed;
 }
 
diff --git a/apps/gui/skin_engine/skin_render.c b/apps/gui/skin_engine/skin_render.c
index 3037a955c7..349dc07d0a 100644
--- a/apps/gui/skin_engine/skin_render.c
+++ b/apps/gui/skin_engine/skin_render.c
@@ -780,7 +780,7 @@ static __attribute__((noinline)) void skin_render_playlistviewer(struct playlist
     int cur_pos, start_item, max;
     int nb_lines = viewport_get_nb_lines(viewer->vp);
 #if CONFIG_TUNER
-    if (current_screen() == GO_TO_FM)
+    if (get_current_activity() == ACTIVITY_FM)
     {
         cur_pos = radio_current_preset();
         start_item = cur_pos + viewer->start_offset;
diff --git a/apps/gui/skin_engine/skin_tokens.c b/apps/gui/skin_engine/skin_tokens.c
index 3aa7947edc..3c6a817ea8 100644
--- a/apps/gui/skin_engine/skin_tokens.c
+++ b/apps/gui/skin_engine/skin_tokens.c
@@ -1730,37 +1730,7 @@ const char *get_token_value(struct gui_wps *gwps,
 
         case SKIN_TOKEN_CURRENT_SCREEN:
         {
-            int curr_screen = current_screen();
-
-#ifdef HAVE_RECORDING
-            /* override current_screen() for recording screen since it may
-             * be entered from the radio screen */
-            if (in_recording_screen())
-                curr_screen = GO_TO_RECSCREEN;
-#endif
-            
-            switch (curr_screen)
-            {
-                case GO_TO_WPS:
-                    curr_screen = 2;
-                    break;
-#ifdef HAVE_RECORDING
-                case GO_TO_RECSCREEN:
-                    curr_screen = 3;
-                    break;
-#endif
-#if CONFIG_TUNER
-                case GO_TO_FM:
-                    curr_screen = 4;
-                    break;
-#endif
-                case GO_TO_PLAYLIST_VIEWER:
-                    curr_screen = 5;
-                    break;
-                default: /* lists */
-                    curr_screen = 1;
-                    break;
-            }
+            int curr_screen = get_current_activity();
             if (intval)
             {
                 *intval = curr_screen;
diff --git a/apps/menu.c b/apps/menu.c
index 8ea2f0883e..6a28b1de26 100644
--- a/apps/menu.c
+++ b/apps/menu.c
@@ -345,7 +345,6 @@ int do_menu(const struct menu_item_ex *start_menu, int *start_selected,
     gui_buttonbar_set_display(&buttonbar, &(screens[SCREEN_MAIN]) );
     gui_buttonbar_set(&buttonbar, "<<<", "", "");
 #endif
-
     menu_callback_type menu_callback = NULL;
 
     /* if hide_theme is true, assume parent has been fixed before passed into
diff --git a/apps/misc.c b/apps/misc.c
index b027215ccc..5a99db2d8b 100644
--- a/apps/misc.c
+++ b/apps/misc.c
@@ -1021,3 +1021,20 @@ int clamp_value_wrap(int value, int max, int min)
 }
 #endif
 #endif
+#define MAX_ACTIVITY_DEPTH 12
+static enum current_activity 
+        current_activity[MAX_ACTIVITY_DEPTH] = {ACTIVITY_UNKNOWN};
+static int current_activity_top = 0;
+void push_current_activity(enum current_activity screen)
+{
+    current_activity[current_activity_top++] = screen;
+}
+void pop_current_activity(void)
+{
+    current_activity_top--;
+}
+enum current_activity get_current_activity(void)
+{
+    return current_activity[current_activity_top?current_activity_top-1:0];
+}
+
diff --git a/apps/misc.h b/apps/misc.h
index 1022af4e93..0fd408b941 100644
--- a/apps/misc.h
+++ b/apps/misc.h
@@ -100,4 +100,24 @@ int clamp_value_wrap(int value, int max, int min);
 #endif
 #endif
 
+enum current_activity {
+    ACTIVITY_UNKNOWN = 0,
+    ACTIVITY_MAINMENU,
+    ACTIVITY_WPS,
+    ACTIVITY_RECORDING,
+    ACTIVITY_FM,
+    ACTIVITY_PLAYLISTVIEWER,
+    ACTIVITY_SETTINGS,
+    ACTIVITY_FILEBROWSER,
+    ACTIVITY_DATABASEBROWSER,
+    ACTIVITY_PLUGINBROWSER,
+    ACTIVITY_QUICKSCREEN,
+    ACTIVITY_PITCHSCREEN,
+    ACTIVITY_OPTIONSELECT
+};
+void push_current_activity(enum current_activity screen);
+void pop_current_activity(void);
+enum current_activity get_current_activity(void);
+
+
 #endif /* MISC_H */
diff --git a/apps/radio/radio.c b/apps/radio/radio.c
index 5c0b884cd1..4da37b2ca5 100644
--- a/apps/radio/radio.c
+++ b/apps/radio/radio.c
@@ -403,6 +403,7 @@ void radio_screen(void)
 #endif
 
     /* change status to "in screen" */
+    push_current_activity(ACTIVITY_FM);
     in_screen = true;
 
     if(radio_preset_count() <= 0)
@@ -868,6 +869,7 @@ void radio_screen(void)
     cpu_idle_mode(false);
 #endif
     fms_fix_displays(FMS_EXIT);
+    pop_current_activity();
     in_screen = false;
 } /* radio_screen */
 
diff --git a/apps/recorder/recording.c b/apps/recorder/recording.c
index b4f7d25cf8..34283b6cb5 100644
--- a/apps/recorder/recording.c
+++ b/apps/recorder/recording.c
@@ -1108,6 +1108,7 @@ bool recording_screen(bool no_source)
 
     struct audio_recording_options rec_options;
     rec_status = RCSTAT_IN_RECSCREEN;
+    push_current_activity(ACTIVITY_RECORDING);
 
 #if (CONFIG_STORAGE & STORAGE_ATA) && (CONFIG_LED == LED_REAL) \
    && !defined(SIMULATOR)
@@ -2089,7 +2090,7 @@ rec_abort:
 #endif
 
     settings_save();
-
+    pop_current_activity();
     return (rec_status & RCSTAT_BEEN_IN_USB_MODE) != 0;
 } /* recording_screen */
 
diff --git a/apps/root_menu.c b/apps/root_menu.c
index 76c081f775..bee1502781 100644
--- a/apps/root_menu.c
+++ b/apps/root_menu.c
@@ -151,6 +151,7 @@ static int browser(void* param)
 #endif
                     strcpy(folder, last_folder);
             }
+            push_current_activity(ACTIVITY_FILEBROWSER);
         break;
 #ifdef HAVE_TAGCACHE
         case GO_TO_DBBROWSER:
@@ -246,12 +247,14 @@ static int browser(void* param)
             filter = SHOW_ID3DB;
             tc->dirlevel = last_db_dirlevel;
             tc->selected_item = last_db_selection;
+            push_current_activity(ACTIVITY_DATABASEBROWSER);
         break;
 #endif
     }
 
     browse_context_init(&browse, filter, 0, NULL, NOICON, folder, NULL);
     ret_val = rockbox_browse(&browse);
+    pop_current_activity();
     switch ((intptr_t)param)
     {
         case GO_TO_FILEBROWSER:
@@ -285,6 +288,7 @@ static int wpsscrn(void* param)
 {
     int ret_val = GO_TO_PREVIOUS;
     (void)param;
+    push_current_activity(ACTIVITY_WPS);
     if (audio_status())
     {
         talk_shutup();
@@ -306,6 +310,7 @@ static int wpsscrn(void* param)
     {
         splash(HZ*2, ID2P(LANG_NOTHING_TO_RESUME));
     }
+    pop_current_activity();
     return ret_val;
 }
 #if CONFIG_TUNER
@@ -511,13 +516,27 @@ static inline int load_screen(int screen)
         if we dont we will always return to the wrong screen on boot */
     int old_previous = last_screen;
     int ret_val;
+    enum current_activity activity = ACTIVITY_UNKNOWN;
     if (screen <= GO_TO_ROOT)
         return screen;
     if (screen == old_previous)
         old_previous = GO_TO_ROOT;
     global_status.last_screen = (char)screen;
     status_save();
+
+    if (screen == GO_TO_BROWSEPLUGINS)
+        activity = ACTIVITY_PLUGINBROWSER;
+    else if (screen == GO_TO_MAINMENU)
+        activity = ACTIVITY_SETTINGS;
+
+    if (activity != ACTIVITY_UNKNOWN)
+        push_current_activity(activity);
+
     ret_val = items[screen].function(items[screen].param);
+
+    if (activity != ACTIVITY_UNKNOWN)
+        pop_current_activity();
+
     last_screen = screen;
     if (ret_val == GO_TO_PREVIOUS)
         last_screen = old_previous;
@@ -578,15 +597,12 @@ void previous_music_is_wps(void)
     previous_music = GO_TO_WPS;
 }
 
-int current_screen(void)
-{
-    return next_screen;
-}
-
 void root_menu(void)
 {
     int previous_browser = GO_TO_FILEBROWSER;
     int selected = 0;
+    
+    push_current_activity(ACTIVITY_MAINMENU);
 
     if (global_settings.start_in_screen == 0)
         next_screen = (int)global_status.last_screen;
diff --git a/apps/root_menu.h b/apps/root_menu.h
index 3d18d18604..2ffdcedda1 100644
--- a/apps/root_menu.h
+++ b/apps/root_menu.h
@@ -64,6 +64,4 @@ extern const struct menu_item_ex root_menu_;
 
 extern void previous_music_is_wps(void);
 
-extern int current_screen(void);
-
 #endif /* __ROOT_MENU_H__ */