Track row index history

src/c/jellyPod.c

@@ -16,7 +16,7 @@ typedef struct {
 	bool using_search;
 	char subscope_search[255]; // TODO tighten and only store first character
 	char subscope_artist[255];
-	// const char *subscope_album; // future use
+	uint16_t scroll_row[NAV_SCOPE_ALBUM_TRACKS + 1]; // last selected row per scope
 } History;
 
 // constants
@@ -117,8 +117,11 @@ static void inbox_received_handler(DictionaryIterator *iter, void *context) {
 			append_to_subscope_history();
 		}
 
+		// when moving deeper start at the top, otherwise restore the row the user left off on
+		uint16_t scroll_row = moving_deeper ? 0 : s_nav_history.scroll_row[s_current_menu_scope];
+		s_nav_history.scroll_row[s_current_menu_scope] = scroll_row;
 		menu_layer_reload_data(s_menu_layer);
-		menu_layer_set_selected_index(s_menu_layer, MenuIndex(0, 0), MenuRowAlignTop, false);
+		menu_layer_set_selected_index(s_menu_layer, MenuIndex(0, scroll_row), MenuRowAlignTop, false);
 		return;
 	}
 }
@@ -164,7 +167,7 @@ static void to_pkjs_move_back() {
 		// return to main menu
 		s_current_menu_scope = NAV_SCOPE_MAIN;
 		menu_layer_reload_data(s_menu_layer);
-		menu_layer_set_selected_index(s_menu_layer, MenuIndex(0, 0), MenuRowAlignTop, false);
+		menu_layer_set_selected_index(s_menu_layer, MenuIndex(0, s_nav_history.scroll_row[NAV_SCOPE_MAIN]), MenuRowAlignTop, false);
 	} else {
 		// otherwise determine last subscope and go to previous scope
 		switch (s_current_menu_scope) {
@@ -212,6 +215,7 @@ static void menu_draw_row(GContext *ctx, const Layer *cell_layer, MenuIndex *cel
 }
 
 static void menu_select_click(struct MenuLayer *menu_layer, MenuIndex *clicked_index, void *context) {
+	s_nav_history.scroll_row[s_current_menu_scope] = clicked_index->row;
 	switch (s_current_menu_scope) {
 	case NAV_SCOPE_MAIN:
 		switch (clicked_index->row) {