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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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from __future__ import absolute_import

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from functools import reduce

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import wx

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import wx.stc

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from six.moves import xrange

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if wx.Platform == '__WXMSW__':

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    faces = {

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        'times': 'Times New Roman',

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        'mono':  'Courier New',

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        'helv':  'Arial',

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        'other': 'Comic Sans MS',

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        'size':  10,

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    }

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else:

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    faces = {

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        'times': 'Times',

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        'mono':  'Courier',

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        'helv':  'Helvetica',

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        'other': 'new century schoolbook',

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        'size':  12,

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    }

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NAVIGATION_KEYS = [

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    wx.WXK_END,

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    wx.WXK_HOME,

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    wx.WXK_LEFT,

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    wx.WXK_UP,

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    wx.WXK_RIGHT,

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    wx.WXK_DOWN,

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    wx.WXK_PAGEUP,

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    wx.WXK_PAGEDOWN,

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    wx.WXK_NUMPAD_HOME,

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    wx.WXK_NUMPAD_LEFT,

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    wx.WXK_NUMPAD_UP,

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    wx.WXK_NUMPAD_RIGHT,

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    wx.WXK_NUMPAD_DOWN,

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    wx.WXK_NUMPAD_PAGEUP,

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    wx.WXK_NUMPAD_PAGEDOWN,

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    wx.WXK_NUMPAD_END]

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def GetCursorPos(old, new):

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    if old == "":

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        return 0

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    old_length = len(old)

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    new_length = len(new)

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    common_length = min(old_length, new_length)

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    i = 0

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    for i in xrange(common_length):

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        if old[i] != new[i]:

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            break

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    if old_length < new_length:

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        if common_length > 0 and old[i] != new[i]:

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            return i + new_length - old_length

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        else:

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            return i + new_length - old_length + 1

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    elif old_length > new_length or i < min(old_length, new_length) - 1:

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        if common_length > 0 and old[i] != new[i]:

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            return i

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        else:

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            return i + 1

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    else:

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        return None

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class CustomStyledTextCtrl(wx.stc.StyledTextCtrl):

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    def __init__(self, *args, **kwargs):

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        wx.stc.StyledTextCtrl.__init__(self, *args, **kwargs)

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        self.Bind(wx.EVT_MOTION, self.OnMotion)

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    def OnMotion(self, event):

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        if wx.Platform == '__WXMSW__':

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            if not event.Dragging():

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                x, _y = event.GetPosition()

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                margin_width = reduce(

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                    lambda x, y: x + y,

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                    [self.GetMarginWidth(i) for i in xrange(3)],

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                    0)

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                if x <= margin_width:

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                    self.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))

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                else:

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                    self.SetCursor(wx.StockCursor(wx.CURSOR_IBEAM))

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            else:

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                event.Skip()

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        else:

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            event.Skip()

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    def AppendText(self, text):

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        self.GotoPos(self.GetLength())

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        self.AddText(text)