#
#   Python GUI - Text Editor - Win32
#

from __future__ import division
import win32con as wc, win32ui as ui
from GUI import export
from GUI.GTextEditors import TextEditor as GTextEditor
from GUI.WinUtils import win_none
from GUI.StdFonts import application_font

PFM_TABSTOPS = 0x10
MAX_TAB_STOPS = 32
LOGPIXELSX = 88

ui.InitRichEdit()

class TextEditor(GTextEditor):

    _pass_key_events_to_platform = True

    def __init__(self, scrolling = 'hv', **kwds):
        win_style = ui.AFX_WS_DEFAULT_VIEW #| wc.WS_HSCROLL | wc.WS_VSCROLL
        win = ui.CreateRichEditView()
        ctl = win.GetRichEditCtrl()
        self._win_ctl = ctl
        if 'h' in scrolling:
            win.SetWordWrap(0) # Must do before CreateWindow
        win.CreateWindow(win_none, 1, win_style, (0, 0, 100, 100))
        #if 'v' not in scrolling:
            # Disabled because it doesn't work properly -- auto-scrolling is prevented
            # but a vertical scroll bar still appears when text goes past bottom of window.
            #ctl.SetOptions(wc.ECOOP_XOR, wc.ECO_AUTOVSCROLL) # Must do after CreateWindow
        ctl.SetOptions(wc.ECOOP_XOR, wc.ECO_NOHIDESEL)
        win.ShowScrollBar(wc.SB_BOTH, False)
        # We allow automatic scroll bar show/hide -- resistance is futile
        win.ShowWindow()
        kwds.setdefault('font', application_font)
        GTextEditor.__init__(self, _win = win, **kwds)
#		self.tab_spacing = self.font.width("X") * 4 ###

    def get_selection(self):
        return self._win.GetSel()
    
    def set_selection(self, value):
        self._win.SetSel(*value)
    
    def get_text(self):
        return self._win.GetWindowText()
    
    def set_text(self, text):
        self._win.SetWindowText(text)

    def get_text_length(self):
        return self._win.GetTextLength()

    def get_font(self):
        return self._font
    
    def set_font(self, x):
        self._font = x
        self._win.SetFont(x._win_font)
        self.invalidate()

    def get_tab_spacing(self):
        pf = self._win_ctl.GetParaFormat()
        tabs = pf[8]
        if tabs:
            return tabs[0] // 20
        else:
            return 36
    
    def set_tab_spacing(self, x):
        dc = self._win.GetDC()
        dpi = dc.GetDeviceCaps(LOGPIXELSX)
        mask = PFM_TABSTOPS
        twips = 1440 * x / dpi
        tabs = [int(round((i + 1) * twips)) for i in xrange(MAX_TAB_STOPS)]
        pf = (mask, 0, 0, 0, 0, 0, 0, tabs)
        old_sel = self.selection
        self.select_all()
        self._win_ctl.SetParaFormat(pf)
        self.selection = old_sel

export(TextEditor)