# Copyright (C) 2012 Daniel Francis <francis@sugarlabs.org>
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#Python translation of Vte.
# http://git.gnome.org/browse/vte?h=vte-next

import logging
logger = logging.getLogger('SugarVteView')

from gi.repository import GObject
from gi.repository import Gtk

class WordCharRange:
    start = None
    end = None

class View(Gtk.Widget, Gtk.Scrollable):
    __gsignals__ = {'buffer-changed': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                       (GObject.TYPE_PYOBJECT,)),
                    'char-size-changed': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                          (GObject.TYPE_INT, GObject.TYPE_INT)),
                    'selection-changed': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                          tuple()),
                    'increase-font-size': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                           tuple()),
                    'decrease-font-size': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                           tuple()),
                    'text-scrolled': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE,
                                      (GObject.TYPE_INT,)),
                    'copy-clipboard': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, tuple()),
                    'paste-clipboard': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, tuple()),
                    'copy-primary': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, tuple()),
                    'paste-primary': (GObject.SIGNAL_RUN_LAST, GObject.TYPE_NONE, tuple())}
    __gproperties__ = {'word-chars' : (GObject.TYPE_PYOBJECT,
                                       'word chars', '',
                                       GObject.PARAM_READWRITE)}
    char_width = 1
    char_height = 2
    char_ascent = 3
    char_descent = 4
    line_thickness = 1
    underline_position = 1
    strikethrough_position = 1
    scroll_on_keystroke = True

    def __init__(self):
        GObject.GObject.__init__(self)
        self.set_can_focus(True)
        self.set_app_paintable(True)
        self.set_redraw_on_allocate(False)
        self.set_word_chars(None)

    vadjustment = GObject.property(type=Gtk.Adjustment)
    hadjustment = GObject.property(type=Gtk.Adjustment)
    hscroll_policy = GObject.property(type=Gtk.ScrollablePolicy, default=Gtk.ScrollablePolicy.NATURAL)
    vscroll_policy = GObject.property(type=Gtk.ScrollablePolicy, default=Gtk.ScrollablePolicy.NATURAL)

    def set_word_chars(self, spec=None):
        """
@spec: a specification
When the user double-clicks to start selection, the terminal will extend
the selection on word boundaries.  It will treat characters included in @spec
as parts of words, and all other characters as word separators.  Ranges of
characters can be specified by separating them with a hyphen.

As a special case, if @spec is %NULL or the empty string, the terminal will
treat all graphic non-punctuation non-space characters as word characters.
"""
        range = WordCharRange()
        self.word_chars = []
        if spec == None or spec[0] == '\0':
            self.notify('word-chars')
            return
        ubuf = unicode(spec)
        i = -1
        while i + 1 < len(ubuf):
            i += 1
            if ubuf[i] == '-':
                range.start = ubuf[i]
                range.end = ubuf[i]
                self.word_chars.append(range)
                logger.debug('Word charset includes hypen')
                continue
            if ubuf[i] != '-' and ubuf[i + 1] != '-':
                range.start = ubuf[i]
                range.end = ubuf[i]
                self.word_chars.append(range)
                continue
            if ubuf[i] != '-' and\
                    ubuf[i + 1] == u'-' and\
                    ubuf[i + 2] != u'-' and\
                    ubuf[i + 2] != unichr(0):
                range.start = ubuf[i]
                range.end = ubuf[i + 1]
                self.word_chars.append(range)
                i += 2
                continue
        self.notify('word-chars')


if __name__ == "__main__":
    view = View()
    w = Gtk.Window()
    w.connect('destroy', Gtk.main_quit)
    w.add(view)
    view.show()
    w.show()
    Gtk.main()