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from gobject import signal_query, signal_new, SIGNAL_ACTION
from gobject import TYPE_BOOLEAN, TYPE_STRING, SIGNAL_NO_RECURSE
from gobject import SIGNAL_RUN_LAST, type_register
SIGNAL = SIGNAL_RUN_LAST|SIGNAL_NO_RECURSE|SIGNAL_ACTION
from gtksourceview2 import View
class Manager(object):
def __init__(self, editor):
self.__init_attributes(editor)
self.__sigid1 = editor.textview.connect("key-press-event", self.__key_press_event_cb)
def __init_attributes(self, editor):
self.__editor = editor
self.__textview = editor.textview
return
def __backward_to_line_begin(self, iterator):
if iterator.starts_line(): return iterator
while True:
self.__editor.response()
iterator.backward_char()
if iterator.starts_line(): break
return iterator
def __forward_to_line_end(self, iterator):
if iterator.ends_line(): return iterator
iterator.forward_to_line_end()
return iterator
def __get_line_text(self):
iterator = self.__editor.cursor
begin = self.__backward_to_line_begin(iterator.copy())
end = self.__forward_to_line_end(iterator)
text = self.__editor.textbuffer.get_text(begin, end)
return text
def __line_ends_with_colon(self):
line_text = self.__get_line_text().strip(" \t")
value = True if line_text.endswith(":") else False
return value
def __get_line_indentation(self):
iterator = self.__editor.cursor
begin = self.__backward_to_line_begin(iterator)
iterator = begin.copy()
while True:
self.__editor.response()
if not (begin.get_char() in (" ", "\t")): break
begin.forward_char()
whitespaces = self.__editor.textbuffer.get_text(iterator, begin)
return whitespaces
def __get_indentation_for_next_line(self):
whitespaces = self.__get_line_indentation()
indentation_width = self.__textview.get_tab_width()
if not whitespaces:
if self.__textview.get_insert_spaces_instead_of_tabs():
whitespaces = " " * indentation_width
else:
whitespaces = "\t"
else:
whitespaces = whitespaces.replace("\t", " " * indentation_width)
number = whitespaces.count(" ")
number_of_indentation_spaces = number - (number % indentation_width)
if self.__textview.get_insert_spaces_instead_of_tabs():
whitespaces = " " * (number_of_indentation_spaces + indentation_width)
else:
whitespaces = "\t" * ((number_of_indentation_spaces / indentation_width) + 1)
return whitespaces
def __get_dedentation_for_next_line(self):
whitespaces = self.__get_line_indentation()
indentation_width = self.__textview.get_tab_width()
if not whitespaces: return ""
whitespaces = whitespaces.replace("\t", " " * indentation_width)
number = whitespaces.count(" ")
number_of_indentation_spaces = number - (number % indentation_width)
if self.__textview.get_insert_spaces_instead_of_tabs():
whitespaces = " " * number_of_indentation_spaces
if indentation_width == whitespaces.count(" "): return ""
whitespaces = whitespaces[:indentation_width]
else:
whitespaces = "\t" * ((number_of_indentation_spaces / indentation_width) - 1)
return whitespaces
def __insert_indentation_on_next_line(self, whitespaces):
iterator = self.__editor.cursor
iterator = self.__forward_to_line_end(iterator)
self.__editor.textbuffer.place_cursor(iterator)
self.__editor.textbuffer.insert_at_cursor("\n" + whitespaces)
return
def __indent_next_line(self):
whitespaces = self.__get_indentation_for_next_line()
self.__insert_indentation_on_next_line(whitespaces)
self.__editor.move_view_to_cursor()
return
def __dedent_next_line(self):
whitespaces = self.__get_dedentation_for_next_line()
self.__insert_indentation_on_next_line(whitespaces)
self.__editor.move_view_to_cursor()
return
def __cursor_is_before_colon(self):
iterator = self.__editor.cursor
end = self.__forward_to_line_end(iterator.copy())
from gtk import TEXT_SEARCH_TEXT_ONLY
if iterator.forward_search(":", TEXT_SEARCH_TEXT_ONLY ,end): return True
return False
def __cursor_is_before_return(self):
iterator = self.__editor.cursor
end = self.__editor.forward_to_line_end(iterator.copy())
text = self.__editor.textbuffer.get_text(iterator, end).strip(" \t")
if text: return True
return False
def __starts_with_return(self):
text = self.__get_line_text()
text = text.strip(" \t")
if text.startswith("return"): return True
return False
def __key_press_event_cb(self, widget, event):
from gtk.gdk import SHIFT_MASK, MOD1_MASK, CONTROL_MASK
from gtk.gdk import keyval_name
if event.state & SHIFT_MASK: return False
if event.state & MOD1_MASK: return False
if event.state & CONTROL_MASK: return False
if keyval_name(event.keyval) != "Return": return False
ends_with_colon = self.__line_ends_with_colon()
if ends_with_colon:
if self.__cursor_is_before_colon(): return False
self.__indent_next_line()
return True
starts_with_return = self.__starts_with_return()
if not starts_with_return: return False
if self.__cursor_is_before_return(): return False
self.__dedent_next_line()
return True
def destroy(self):
self.__editor.disconnect_signal(self.__sigid1, self.__textview)
del self
self = None
return
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