import re

import wx


from pwiki import wxHelper

WIKIDPAD_PLUGIN = (("MenuFunctions",1),)

def describeMenuItems(wiki):
    """
    wiki -- Calling PersonalWikiFrame
    Returns a sequence of tuples to describe the menu items, where each must
    contain (in this order):
        - callback function
        - menu item string
        - menu item description (string to show in status bar)
    It can contain the following additional items (in this order), each of
    them can be replaced by None:
        - icon descriptor (see below, if no icon found, it won't show one)
        - menu item id.
        - update function
        - kind of menu item (wx.ITEM_NORMAL, wx.ITEM_CHECK)


    The  callback function  must take 2 parameters:
        wiki - Calling PersonalWikiFrame
        evt - wx.CommandEvent

    If the  menu item string  contains one or more vertical bars '|' these
        are taken as delimiters to describe a "path" of submenus where
        the item should be placed. E.g. the item string
        "Admin|Maintenance|Reset Settings" will create in plugins menu
        a submenu "Admin" containing a submenu "Maintenance" containing
        the item "Reset Settings".

    An  icon descriptor  can be one of the following:
        - a wx.Bitmap object
        - the filename of a bitmap (if file not found, no icon is used)
        - a tuple of filenames, first existing file is used
    """
    
    kb = wiki.getKeyBindings()
    
    return ((wordCount, u"Word count", u"Word count"),)


_splitterRE = re.compile(ur"\s+", re.UNICODE)

_removeRE = re.compile(ur"(?:(?!\s)(?:\W))+", re.UNICODE)


def wordCount(wiki, evt):
    wiki.showStatusMessage("wordCount")

    editor = wiki.getActiveEditor()
    if editor is None:
        return
    
    text = editor.GetSelectedText()
    
    if text == "":
        # Whole editor content
        text = editor.GetText()
    
    text = _removeRE.sub(u"", text)
    
    splits = _splitterRE.split(text)
    
    try:
        while splits[0] == "":
            del splits[0]
    except IndexError:
        pass

    try:
        while splits[-1] == "":
            del splits[-1]
    except IndexError:
        pass

    count = len(splits)
    
    wx.CallAfter(wiki.showStatusMessage, "Counted %i words" % count, -1)