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  • Committer: Martin Pool
  • Date: 2006-05-05 01:29:34 UTC
  • mfrom: (1697 +trunk)
  • mto: This revision was merged to the branch mainline in revision 1699.
  • Revision ID: mbp@sourcefrog.net-20060505012934-1043f68323f15f88
[merge] bzr.dev

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bzrlib/textmerge.py
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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#
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# Author: Martin Pool <mbp@canonical.com>
 
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# Author: Martin Pool <mbp@canonical.com> 
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#         Aaron Bentley <aaron.bentley@utoronto.ca>
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import bzrlib.patiencediff
 
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from difflib import SequenceMatcher
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class TextMerge(object):
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    This is an iterable of tuples of lists of lines.
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    Each tuple may have a length of 1 - 3, depending on whether the region it
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    represents is conflicted.
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    Unconflicted region tuples have length 1.
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    Conflicted region tuples have length 2 or 3.  Index 1 is text_a, e.g. THIS.
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    Index 1 is text_b, e.g. OTHER.  Index 2 is optional.  If present, it
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                    yield line
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            else:
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                yield self.a_marker
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                for line in lines[0]:
 
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                for line in lines[0]: 
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                    yield line
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                yield self.split_marker
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                for line in lines[1]:
 
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                for line in lines[1]: 
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                    yield line
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                yield self.b_marker
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    regions produce conflicts.
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    """
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    def __init__(self, lines_a, lines_b, a_marker=TextMerge.A_MARKER,
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                 b_marker=TextMerge.B_MARKER,
 
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    def __init__(self, lines_a, lines_b, a_marker=TextMerge.A_MARKER, 
 
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                 b_marker=TextMerge.B_MARKER, 
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                 split_marker=TextMerge.SPLIT_MARKER):
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        TextMerge.__init__(self, a_marker, b_marker, split_marker)
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        self.lines_a = lines_a
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        self.lines_b = lines_b
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    def _merge_struct(self):
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        """Return structured merge info.
 
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        """Return structured merge info.  
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        See TextMerge docstring.
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        """
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        sm = bzrlib.patiencediff.PatienceSequenceMatcher(None, self.lines_a, self.lines_b)
 
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        sm = SequenceMatcher(None, self.lines_a, self.lines_b)
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        pos_a = 0
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        pos_b = 0
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        for ai, bi, l in sm.get_matching_blocks():
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            yield(self.lines_a[pos_a:ai], self.lines_b[pos_b:bi])
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            # matching lines
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            yield(self.lines_a[ai:ai+l],)
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            pos_a = ai + l
 
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            pos_a = ai + l 
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            pos_b = bi + l
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        # final non-matching lines
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        yield(self.lines_a[pos_a:-1], self.lines_b[pos_b:-1])