diff options
Diffstat (limited to 'sharedstate.git/sharedstate/sharedtext.py')
| -rw-r--r-- | sharedstate.git/sharedstate/sharedtext.py | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/sharedstate.git/sharedstate/sharedtext.py b/sharedstate.git/sharedstate/sharedtext.py deleted file mode 100644 index 384f0a8..0000000 --- a/sharedstate.git/sharedstate/sharedtext.py +++ /dev/null @@ -1,181 +0,0 @@ -# sharedobjects.py, classes to aid activities in sharing a state -# Reinier Heeres, reinier@heeres.eu -# -# This program 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 2 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -# -# Change log: -# 2007-06-21: rwh, first version - -import types -import difflib -import logging -_logger = logging.getLogger('sharinghelper') - -from sharedobject import SharedObject - -def my_joinlines(list, addsep=False, separator='\n'): - if len(list) == 0: - return '' - string = list[0] - for s in list[1:]: - if addsep: - string += separator - string += s - return string - -def my_splitlines(str, keepsep=False, separators=['\n']): - list = [] - if str is None: - return list - ofs = 0 - startofs = 0 - while ofs < len(str): - if str[ofs] in separators: - if keepsep: - list.append(str[startofs:ofs+1]) - else: - if startofs != ofs: - list.append(str[startofs:ofs]) - else: - list.append('') - startofs = ofs + 1 - ofs += 1 - return list - -def string_to_list(str): - list = [] - if str is not None: - for i in str: - list.append(i) - return list - -def list_to_string(l): - str = "" - for i in l: - str += i - return str - -class SharedText(SharedObject): - """Shared text object, generates line-by-line difference objects""" - - REPLACE = 0 - DELETE = 1 - INSERT = 2 - - BY_CHAR = 0 - BY_WORD = 1 - BY_LINE = 2 - - def __init__(self, name, helper, opt={}, by_what=BY_CHAR): - SharedObject.__init__(self, name, helper, opt=opt) - self._value = '' - self._by_what = by_what - - def split(self, s): - if self._by_what == SharedText.BY_CHAR: - return string_to_list(s) - elif self._by_what == SharedText.BY_WORD: - return my_splitlines(s, keepsep=True, separators=['\n', ' ']) - elif self._by_what == SharedText.BY_LINE: - return my_splitlines(s, keepsep=True) - else: - _logger.error('SharedText.split(): unknown splitting type') - - def join(self, l): - if self._by_what == SharedText.BY_CHAR: - return list_to_string(l) - elif self._by_what == SharedText.BY_WORD: - return my_joinlines(l) - elif self._by_what == SharedText.BY_LINE: - return my_joinlines(l) - else: - _logger.error('SharedText.split(): unknown splitting type') - - def _compatible_diffs(self, da, db): - return True - - def diff(self, cur, old): - """Generate a difference object between to text objects""" - - _logger.debug('Generating diff between %r and %r', cur, old) - - l1 = self.split(cur) - l2 = self.split(old) - sm = difflib.SequenceMatcher(None, l2, l1) - ret = [] - for (tag, i1, i2, j1, j2) in sm.get_opcodes(): - if tag is 'replace': - ret.append((SharedText.REPLACE, (i1, i2, j1, j2), l1[j1:j2])) - elif tag is 'delete': - ret.append((SharedText.DELETE, (i1, i2, j1, j2), None)) - elif tag is 'insert': - ret.append((SharedText.INSERT, (i1, i2, j1, j2), l1[j1:j2])) - elif tag is 'equal': - pass - else: - _logger.warning('SharedText.diff(): unkown tag: %s', tag) - - if len(ret) is 0: - return None - else: - return ret - - def _apply_diff_to(self, obj, diffobj): - """Apply a diff and return an object that describes the inverse diff""" - - if diffobj is None: - _logger.error('SharedText.apply_diff_to(): no diffobj given') - return (None, None) - - _logger.debug('Applying %r to %r', diffobj, obj) - ret = [] - d = 0 - l2 = self.split(obj) - for (tag, (i1, i2, j1, j2), val) in diffobj: - i1 -= d - i2 -= d -# print 'd: %r' % (d) - if tag is SharedText.REPLACE: - ret.append((SharedText.REPLACE, (j1, j2, i1, i2), l2[i1:i2])) - l2[i1:i2] = val - d -= (j2 - j1) - (i2 - i1) - elif tag is SharedText.DELETE: - ret.append((SharedText.INSERT, (j1, j2, i1, i2), l2[i1:i2])) - del(l2[i1:i2]) - d += i2 - i1 - elif tag is SharedText.INSERT: - ret.append((SharedText.DELETE, (j1, j2, i1, i2), None)) - l2[i1:i1] = val - d -= j2 - j1 - - obj = self.join(l2) - return (obj, ret) - - - def insert(self, ofs, str): - self._value = self._value[:ofs] + str + self._value[ofs:] - dobj = {"type": 'chars', "data": (SharedText.INSERT, ofs, str)} - self.changed(dobj, True) - - def remove(self, ofs, len): - del self._value[ofs:ofs+len] - dobj = {"type": 'chars', "data": (SharedText.REMOVE, ofs, len)} - self.changed(dobj, True) - - def replace(self, ofs, str): - self._value[ofs:ofs+len(str)] = str - dobj = {"type": 'chars', "data": (SharedText.REPLACE, ofs, str)} - self.changed(dobj, True) - |