# ########################################################### #
# created:		2010-07-14
# developer:	JohnLBevan (http://developer42.wordpress.com)
# description:	Pulls task comments out of code (just //todo:... or #todo:... for now; but easily customisable)
#
# modified:		2010-07-04
# by:			JohnLBevan
import pn
import scintilla
import re, string
from pypn.decorators import script

todo = re.compile(r"((?:\/{2}|#)todo:.*$)",re.M) 
offset = 0

@script("Task List", "Productivity")
def GetTaskList():
	"""Pulls tasks from the doc (or selected text) and outputs to a new window"""
	data = GetSelectedText(scintilla.Scintilla(pn.CurrentDoc()))
	data = InsertLineNos(data)
	lines = todo.findall(data) #NOfEachTuple(todo.findall(data),1) (required before I figured out ?:)
	data = "\n".join(lines)
	UpdateDocument(scintilla.Scintilla(pn.NewDocument(None)),data)
	
def GetSelectedText(editor):
	"""pulls the selected text from the editor window, or the whole docs content if nothings selected"""
	start = editor.SelectionStart
	end = editor.SelectionEnd
	if (start == end):  
		start = 0
		end = editor.Length 
	else:
		GetOffset(editor)	
	return editor.GetTextRange(start, end)

def GetOffset(editor):
	"""works out what line number the selection starts at & stores it in a global variable"""
	global offset
	end = editor.SelectionStart
	text = editor.GetTextRange(0, end)
	offset = text.count("\n") #assumes there are no docs with just \r as a line break

def UpdateDocument(editor, content):
	"""puts the content into the editor window"""
	editor.BeginUndoAction()
	editor.ClearAll()
	editor.AddText(len(content), content)
	editor.EndUndoAction()

def InsertLineNos(data):
	"""puts in line numbers"""
	data = data.replace("\r\n","\r") + '\r'
	data = data.replace("\n","\r")
	global offset
	i = offset
	while '\r' in data:
		i = i + 1
		data = data.replace("\r"," :: at line " + str(i)+"\n",1)
	return data

def NOfEachTuple(tuples, n):
	"""takes an array of tuples and returns a list containing just the nth item of each tuple"""
	result = [0]
	result.pop()
	for t in tuples:
		result.append(t[n])
	return result