removed redundant sort on file listing; sort on file lists should now

only be called on the specific incantation.

wrote a preliminary list scroller on beta only.

bin/util.py

@@ -31,6 +31,7 @@ import colorama
 
 ## misc globals
 BACKS = ['back', 'b', 'q']
+NAVS = ['u', 'd']
 
 ## color stuff
 colorama.init()
@@ -146,6 +147,61 @@ def genID(digits=5):
 
     return id
 
+def menu_handler(options, prompt, pagify=10, rainbow=False):
+    ''' 
+    This menu handler takes an incoming list of options, pagifies to a
+    pre-set value, and queries via the prompt. Calls print_menu() and
+    list_select() as helpers.
+    '''
+
+    optCount = len(options)
+    page = 0
+    total = optCount / pagify
+
+    # don't display empty pages
+    if optCount % pagify == 0:
+        total = total - 1
+
+    if total < 2:
+        print_menu(options, rainbow)
+        return list_select(options, prompt)
+
+    else:
+        return page_helper(options, prompt, pagify, rainbow, page, total)
+
+
+def page_helper(options, prompt, pagify, rainbow, page, total):
+    '''
+    A helper to process pagination.
+    '''
+
+    ## make short list
+    x = 0 + page * pagify
+    y = x + pagify
+    optPage = options[x:y]
+
+    print_menu(optPage, prompt)
+    print("\n\t( page {page} of {total}; type 'u' or 'd' to scroll up and down )").format(page=page+1, total=total+1)
+
+    ans = list_select(optPage, prompt)
+
+    if ans in NAVS:
+        if ans == 'u':
+            if page == 0:
+                print("can't scroll up anymore!")
+            else:
+                page = page - 1
+        else:
+            if page == total:
+                print("can't scroll down anymore!")
+            else:
+                page = page + 1
+
+        print("")
+        return page_helper(options, prompt, pagify, rainbow, page, total)
+
+    return ans
+
 def print_menu(menu, rainbow=False):
     '''
     A pretty menu handler that takes an incoming lists of
@@ -183,6 +239,9 @@ def list_select(options, prompt):
     if choice in BACKS:
         return False
 
+    if choice in NAVS:
+        return choice
+
     try:
         ans = int(choice)
     except ValueError: