root_menu move tag cache init check to pictureflow plugin

let pictureflow decide if the tag cache is ready instead of core

Change-Id: I2ab9b375d773dbbc28ea41fbf7bb6fb361ace8fd

apps/plugin.c

@@ -803,6 +803,10 @@ static const struct plugin_api rockbox_api = {
 
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
+
+#ifdef HAVE_TAGCACHE
+    tagcache_get_stat,
+#endif
 };
 
 static int plugin_buffer_handle;

apps/plugin.h

@@ -154,7 +154,7 @@ void* plugin_get_buffer(size_t *buffer_size);
 #define PLUGIN_MAGIC 0x526F634B /* RocK */
 
 /* increase this every time the api struct changes */
-#define PLUGIN_API_VERSION 239
+#define PLUGIN_API_VERSION 240
 
 /* update this to latest version if a change to the api struct breaks
    backwards compatibility (and please take the opportunity to sort in any
@@ -930,6 +930,11 @@ struct plugin_api {
 
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
+       
+#ifdef HAVE_TAGCACHE
+    struct tagcache_stat* (*tagcache_get_stat)(void);
+#endif
+
 };
 
 /* plugin header */

apps/plugins/pictureflow/pictureflow.c

@@ -530,6 +530,26 @@ static void draw_progressbar(int step, int count, char *msg);
 static void draw_splashscreen(unsigned char * buf_tmp, size_t buf_tmp_size);
 static void free_all_slide_prio(int prio);
 
+static bool check_database(bool prompt)
+{
+    bool needwarn = true;
+    struct tagcache_stat *stat = rb->tagcache_get_stat();
+    while ( !(stat->initialized && stat->ready) )
+    {
+        if (needwarn)
+            rb->splash(0, ID2P(LANG_TAGCACHE_BUSY));
+        if (!prompt)
+            return false;
+        else if (rb->action_userabort(HZ/5))
+            return false;
+
+        needwarn = false;
+        stat = rb->tagcache_get_stat();
+        rb->yield();
+    }
+    return true;
+}
+
 static bool confirm_quit(void)
 {
     const struct text_message prompt =
@@ -3821,6 +3841,17 @@ enum plugin_status plugin_start(const void *parameter)
 
     void * buf;
     size_t buf_size;
+    bool prompt = (parameter && ((char *) parameter)[0] == ACTIVITY_MAINMENU);
+
+    if (!check_database(prompt))
+    {
+        if (prompt)
+            return PLUGIN_OK;
+        else
+            error_wait("Please enable database");
+
+        return PLUGIN_ERROR;
+    }
 
     atexit(cleanup);
 

apps/root_menu.c

@@ -704,7 +704,7 @@ static int load_context_screen(int selection)
 }
 
 #ifdef HAVE_PICTUREFLOW_INTEGRATION
-static int load_plugin_screen(char *plug_path)
+static int load_plugin_screen(char *plug_path, void* plug_param)
 {
     int ret_val;
     int old_previous = last_screen;
@@ -712,7 +712,7 @@ static int load_plugin_screen(char *plug_path)
     global_status.last_screen = (char)next_screen;
     status_save();
 
-    switch (plugin_load(plug_path, NULL))
+    switch (plugin_load(plug_path, plug_param))
     {
     case PLUGIN_GOTO_WPS:
         ret_val = GO_TO_WPS;
@@ -729,20 +729,6 @@ static int load_plugin_screen(char *plug_path)
         last_screen = (old_previous == next_screen) ? GO_TO_ROOT : old_previous;
     return ret_val;
 }
-
-static bool check_database(void)
-{
-    bool needwarn = true;
-    while ( !tagcache_is_usable() )
-    {
-        if (needwarn)
-            splash(0, ID2P(LANG_TAGCACHE_BUSY));
-        if ( action_userabort(HZ/5) )
-            return false;
-        needwarn = false;
-    }
-    return true;
-}
 #endif
 
 void root_menu(void)
@@ -823,18 +809,18 @@ void root_menu(void)
                 break;
 #ifdef HAVE_PICTUREFLOW_INTEGRATION
             case GO_TO_PICTUREFLOW:
-                if (check_database())
             {
                 char pf_path[MAX_PATH];
+                char activity[6];/* big enough to display int */
+                snprintf(activity, sizeof(activity), "%d", get_current_activity());
                 snprintf(pf_path, sizeof(pf_path),
                         "%s/pictureflow.rock",
                         PLUGIN_DEMOS_DIR);
-                    next_screen = load_plugin_screen(pf_path);
+                
+                next_screen = load_plugin_screen(pf_path, &activity);
                 previous_browser = (next_screen != GO_TO_WPS) ? GO_TO_FILEBROWSER : GO_TO_PICTUREFLOW;
-                }
-                else
-		    next_screen = GO_TO_PREVIOUS;
                 break;
+            }
 #endif
             default:
 #ifdef HAVE_TAGCACHE