# This is a keyjnote "InfoScript" that patches in a new feature. This script
# allows you to jump to a page in a presentation by typing in the page number
# and then hitting 'g'.
#
# If you make a mistake, hit '9' a few times and hit 'g'. The script will
# silently fail to go to the non-existent page, and you can start again.
# 
# This is how I call keyjnote:
#
# keyjnote -g 1024x768 -t none -I ~/bin/keyjnote_jumper.py
# Where the last argument is the location of this file.
#
# Other key presses I use:
# tab  show icon view
# f    fullscreen toggle
# b/w  black/white screen toggle
# If you draw a box with left mouse, clear with right mouse click.
#
# Iain Murray, May 2008

num_key_buff = ''

def key_accum(ch):
    global num_key_buff
    num_key_buff += ch

def go_key_press():
    global num_key_buff
    if num_key_buff:
        try:
            page = int(num_key_buff)
            num_key_buff = ''
            LeaveZoomMode()
            if page < 1:
                page = PageCount + page
            TransitionTo(page)
        except:
            num_key_buff = ''

def key0_press(): key_accum('0')
def key1_press(): key_accum('1')
def key2_press(): key_accum('2')
def key3_press(): key_accum('3')
def key4_press(): key_accum('4')
def key5_press(): key_accum('5')
def key6_press(): key_accum('6')
def key7_press(): key_accum('7')
def key8_press(): key_accum('8')
def key9_press(): key_accum('9')
def keyminus_press(): key_accum('-')

PageProps = {}

for pp in range(PageCount):
    # Note keyjnote documentation recommends against using lambda functions
    # in PageProps.
    PageProps[pp+1] = {'keys': {
         'g': go_key_press,
         'm': keyminus_press, # would have to hack keyjnote itself to catch '-'?
         '0': key0_press,
         '1': key1_press,
         '2': key2_press,
         '3': key3_press,
         '4': key4_press,
         '5': key5_press,
         '6': key6_press,
         '7': key7_press,
         '8': key8_press,
         '9': key9_press,
       }}

# Including one lambda function causes keyjnote to do something desirable: not
# trash this script's file when hitting 's'. So I'm deliberately poisoning the
# PageProps dictionary here:
PageProps[1]['keys']['0'] = lambda: key_accum('0')