editors/sced/scedwin/py/util.py

   1 # sced (SuperCollider mode for gedit)
   2 #
   3 # Copyright 2012 Jakob Leben
   4 # Copyright 2009 Artem Popov and other contributors (see AUTHORS)
   5 #
   6 #    sced is free software:
   7 #    you can redistribute it and/or modify
   8 #    it under the terms of the GNU General Public License as published by
   9 #    the Free Software Foundation, either version 3 of the License, or
  10 #    (at your option) any later version.
  11 #
  12 #    This program is distributed in the hope that it will be useful,
  13 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #    GNU General Public License for more details.
  16 #
  17 #    You should have received a copy of the GNU General Public License
  18 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 def is_block_beginning(s):
  21     s = "".join(s.split())
  22     # FIXME: clarify this later
  23     if s == "(" or s.startswith("(//") or s.startswith("(/*"):
  24         return True
  25     else:
  26         return False
  27
  28 def find_block(doc, where=None):
  29     if where is None:
  30         i1 = doc.get_iter_at_mark(doc.get_insert())
  31     else:
  32         i1 = where.copy()
  33
  34     # move backward until a block beginning is found
  35     while True:
  36         i1.set_line_offset(0)
  37
  38         i2 = i1.copy()
  39         i2.forward_to_line_end()
  40
  41         if is_block_beginning(doc.get_text(i1, i2)):
  42             break
  43
  44         if not i1.backward_line():
  45             raise RuntimeError("Couldn't find where code block starts!")
  46
  47     i2 = i1.copy()
  48     count = 1
  49
  50     line_comment = False
  51     block_comment = 0
  52
  53     # move forward to the end of the block
  54     while True:
  55         if not i2.forward_char():
  56             raise RuntimeError("Couldn't find where code block ends!")
  57
  58         char = i2.get_char()
  59
  60         i3 = i2.copy()
  61         i3.forward_chars(2)
  62         ct = i2.get_text(i3)
  63
  64         if ct == "*/":
  65             block_comment -= 1
  66         elif ct == "/*":
  67             block_comment += 1
  68         elif ct == "//":
  69             line_comment = True
  70         elif char == "\n" and line_comment:
  71             line_comment = False
  72
  73         if not block_comment and not line_comment:
  74             if char == "(":
  75                 count += 1
  76             elif char == ")":
  77                 count -= 1
  78
  79         if count == 0:
  80             break
  81
  82     # XXX: include 2 more characters just in case "where" is near the end
  83     i2.forward_chars(2)
  84
  85     if where.in_range(i1, i2):
  86         return i1, i2
  87     else:
  88         raise RuntimeError("Couldn't find code block!")
  89
  90
  91
  92 import re
  93
  94 def scpred(c, *args):
  95     if re.match("[A-Za-z0-9_]", c):
  96         return False
  97     return True
  98
  99 def find_word(doc, where=None):
 100     if where is None:
 101         i1 = doc.get_iter_at_mark(doc.get_insert())
 102     else:
 103         i1 = where.copy()
 104
 105     i1.backward_find_char(scpred)
 106     i1.forward_char() # <-- FIXME: forward should not normally be required
 107
 108     i2 = i1.copy()
 109     i2.forward_find_char(scpred)
 110
 111     return i1, i2