Add open_plugin to core

open_plugin allows arbitrary plugins to be called
in hotkey and start screen

replaces PictureFlow Integration
shortcuts menu plays plugins now too

rather than store paths and parameters in the settings
that reside in memory instead entries in a file are searched by hash.
after all, the plugin has to be loaded from disk anyways

----------------------------------------------------------------------------
shortcut_viewer.rock--  can now call plugins rather than taking you to them
in the browser
-----------------------------------------------------------------------------
Added a new option to menus:
 F_CB_ON_SELECT_ONLY
 instead of option callback every time a item is accessed
 F_CB_ON_SELECT_ONLY fires callback only when item is selected
-----------------------------------------------------------------------------
Added manual entries
-----------------------------------------------------------------------------

Change-Id: I078b57b1d2b4dd633c89212c1082fcbc1b516e6a

apps/plugins/shortcuts/shortcuts_view.c

@@ -22,7 +22,7 @@
 
 #include "shortcuts.h"
 
-
+#define LOOP_EXIT 1
 
 enum sc_list_action_type
 {
@@ -35,7 +35,6 @@ enum sc_list_action_type
 
 static char *link_filename;
 static bool user_file;
-static bool usb_connected = false;
 
 enum sc_list_action_type draw_sc_list(struct gui_synclist *gui_sc);
 
@@ -43,10 +42,10 @@ enum sc_list_action_type draw_sc_list(struct gui_synclist *gui_sc);
 static const char* build_sc_list(int selected_item, void *data,
                                  char *buffer, size_t buffer_len);
 
-/* Returns true iff we should leave the main loop */
-bool list_sc(void);
+/* Returns LOOP_EXIT iff we should leave the main loop */
+int list_sc(void);
 
-bool goto_entry(char *file_or_dir);
+int goto_entry(char *file_or_dir);
 bool ends_with(char *str, char *suffix);
 
 
@@ -104,7 +103,7 @@ static const char* build_sc_list(int selected_item, void *data,
 }
 
 
-bool list_sc(void)
+int list_sc(void)
 {
     int selected_item = 0;
     enum sc_list_action_type action = SCLA_NONE;
@@ -122,8 +121,7 @@ bool list_sc(void)
     /* Draw the prepared widget to the LCD now */
     action = draw_sc_list(&gui_sc);
     if (action == SCLA_USB) {
-        usb_connected = true;
-        return true;
+        return PLUGIN_USB_CONNECTED;
     }
 
     /* which item do we action? */
@@ -132,7 +130,7 @@ bool list_sc(void)
     if (!is_valid_index(&sc_file, selected_item)) {
         /* This should never happen */
         rb->splash(HZ*2, "Bad entry selected!");
-        return true;
+        return PLUGIN_ERROR;
     }
 
     /* perform the following actions if the user "selected"
@@ -145,13 +143,13 @@ bool list_sc(void)
             rb->splashf(HZ, "Deleting %s", sc_file.entries[selected_item].disp);
             remove_entry(&sc_file, selected_item);
             dump_sc_file(&sc_file, link_filename);
-            return (sc_file.entry_cnt == 0);
+            return (sc_file.entry_cnt == 0)? LOOP_EXIT : PLUGIN_OK;
         default:
-            return true;
+            return LOOP_EXIT;
     }
 }
 
-
+#if 0
 bool goto_entry(char *file_or_dir)
 {
     DEBUGF("Trying to go to '%s'...\n", file_or_dir);
@@ -181,7 +179,46 @@ bool goto_entry(char *file_or_dir)
     rb->set_current_file(file_or_dir);
     return true;
 }
+#endif
 
+int goto_entry(char *file_or_dir)
+{
+    DEBUGF("Trying to go to '%s'...\n", file_or_dir);
+
+    bool is_dir = ends_with(file_or_dir, PATH_SEPARATOR);
+    bool exists;
+    char *what;
+    if (is_dir) {
+        what = "Directory";
+        exists = rb->dir_exists(file_or_dir);
+    } else {
+        what = "File";
+        exists = rb->file_exists(file_or_dir);
+    }
+
+    if (!exists) {
+        rb->splashf(HZ*2, "%s %s no longer exists on disk", what, file_or_dir);
+        return PLUGIN_ERROR;
+    }
+
+    int len = rb->strlen(file_or_dir);
+    if(!is_dir && len > 5 && rb->strcasecmp(&(file_or_dir[len-5]), ".rock") == 0)
+    {
+        return rb->plugin_open(file_or_dir, NULL);
+    }
+    else
+    {
+        /* Set the browsers dirfilter to the global setting
+         * This is required in case the plugin was launched
+         * from the plugins browser, in which case the
+         * dirfilter is set to only display .rock files */
+        rb->set_dirfilter(rb->global_settings->dirfilter);
+
+        /* Change directory to the entry selected by the user */
+        rb->set_current_file(file_or_dir);
+    }
+    return PLUGIN_OK;
+}
 
 bool ends_with(char *string, char *suffix)
 {
@@ -195,7 +232,7 @@ bool ends_with(char *string, char *suffix)
 
 enum plugin_status plugin_start(const void* void_parameter)
 {
-    bool leave_loop;
+    int ret;
 
     /* This is a viewer, so a parameter must have been specified */
     if (void_parameter == NULL) {
@@ -219,8 +256,7 @@ enum plugin_status plugin_start(const void* void_parameter)
         /* if there's only one entry in the user .link file,
          * go straight to it without displaying the menu
          * thus allowing 'quick links' */
-        goto_entry(sc_file.entries[0].path);
-        return PLUGIN_OK;
+        return goto_entry(sc_file.entries[0].path);
     }
 
     FOR_NB_SCREENS(i)
@@ -228,11 +264,13 @@ enum plugin_status plugin_start(const void* void_parameter)
 
     do {
         /* Display a menu to choose between the entries */
-        leave_loop = list_sc();
-    } while (!leave_loop);
+        ret = list_sc();
+    } while (ret == PLUGIN_OK);
+    if (ret == LOOP_EXIT)
+        ret = PLUGIN_OK;
 
     FOR_NB_SCREENS(i)
         rb->viewportmanager_theme_undo(i, false);
 
-    return usb_connected ? PLUGIN_USB_CONNECTED : PLUGIN_OK;
+    return ret;
 }