Mercurial > hg-stable
view tests/test-simplemerge.py @ 19387:f2e4fdb3dd27
hgweb: code selection without line numbers in file source view
All the source lines are put in a <pre> tag, which gives correct display and
copy&paste in both Chromium (WebKit) and FireFox: line numbers are not copied,
all the tabs and spaces are kept. This doesn't change the visual appearance
of the view compared to current hgweb version and doesn't use any JS code.
Also, stripes in this view are now generated clientside with CSS.
This implementation is chosen because other variants have important issues:
Strategy FF Chrome
current D,LT,E,T,L D,L
pre S,NW S,NW
pre/div/nbsp LT,E,T,TS,NW TS,NW
pre/div/br LT,E,T,NW NW
ol/li/nbsp LT,E,T,TS,AJ TS,AJ
ol/li/br LT,E,T,AJ AJ
pre/span LV LV
Legend
Strategies:
- current: implemented in hgweb before this patch, i.e. divs for each line,
and line numbers links in the div too
- pre: the whole code in one pre tag with newlines, all line numbers
in another one with 'float: left'
- pre/div/{nbsp,br}: same as just 'pre', but separate divs for each line and
or <br> instead of empty lines (otherwise they are not copied at all)
- ol/li/{nbsp,br}: a single ol with li's and divs for each line,
or <br> same as in previous strategy
- pre/span: this patch
Problems:
D = (very minor) display problems, like wrong width of leading tabs
LT = loses leading/trailing whitespace
E = loses embedded whitespace
B = loses blank lines
T = loses tabs
L = selects line numbers
LV = (only) visually selects line numbers
LVE = (only) visually selects line numbers at empty lines
S = no stripes (and no ability to easily highlight
lines-which-are-linked-at in the future)
TS = space copied instead of empty line
AJ = get anchor links only with JS (they work even without)
NW = no linewrap easily possible (in future)
As for browser versions compatibility, the CSS tricks used are supported in
(according to caniuse.com):
a) line numbers generation with 'content:' property and CSS counters:
IE 8+, all other popular browsers (in pre-WebKit Opera numbers are being copied)
b) stripes ('nth-child' selector):
IE 8+, FF 3.5+, Safari 3.2+, Opera 9.5+, all other popular browsers
c) line numbers are not visually selected ('user-select:' property):
IE 10+, Opera 15.0+, all other popular browsers
This patch is based on a demo implementation by
Martin Geisler <martin@geisler.net>.
| author | Alexander Plavin <me@aplavin.ru> |
|---|---|
| date | Thu, 04 Jul 2013 14:18:44 +0400 |
| parents | d08b333816c6 |
| children | f18830651811 |
line wrap: on
line source
# Copyright (C) 2004, 2005 Canonical Ltd # # 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, see <http://www.gnu.org/licenses/>. import unittest from unittest import TestCase from mercurial import util, simplemerge # bzr compatible interface, for the tests class Merge3(simplemerge.Merge3Text): """3-way merge of texts. Given BASE, OTHER, THIS, tries to produce a combined text incorporating the changes from both BASE->OTHER and BASE->THIS. All three will typically be sequences of lines.""" def __init__(self, base, a, b): basetext = '\n'.join([i.strip('\n') for i in base] + ['']) atext = '\n'.join([i.strip('\n') for i in a] + ['']) btext = '\n'.join([i.strip('\n') for i in b] + ['']) if util.binary(basetext) or util.binary(atext) or util.binary(btext): raise util.Abort("don't know how to merge binary files") simplemerge.Merge3Text.__init__(self, basetext, atext, btext, base, a, b) CantReprocessAndShowBase = simplemerge.CantReprocessAndShowBase def split_lines(t): from cStringIO import StringIO return StringIO(t).readlines() ############################################################ # test case data from the gnu diffutils manual # common base TZU = split_lines(""" The Nameless is the origin of Heaven and Earth; The named is the mother of all things. Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their outcome. The two are the same, But after they are produced, they have different names. They both may be called deep and profound. Deeper and more profound, The door of all subtleties! """) LAO = split_lines(""" The Way that can be told of is not the eternal Way; The name that can be named is not the eternal name. The Nameless is the origin of Heaven and Earth; The Named is the mother of all things. Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their outcome. The two are the same, But after they are produced, they have different names. """) TAO = split_lines(""" The Way that can be told of is not the eternal Way; The name that can be named is not the eternal name. The Nameless is the origin of Heaven and Earth; The named is the mother of all things. Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their result. The two are the same, But after they are produced, they have different names. -- The Way of Lao-Tzu, tr. Wing-tsit Chan """) MERGED_RESULT = split_lines("""\ The Way that can be told of is not the eternal Way; The name that can be named is not the eternal name. The Nameless is the origin of Heaven and Earth; The Named is the mother of all things. Therefore let there always be non-being, so we may see their subtlety, And let there always be being, so we may see their result. The two are the same, But after they are produced, they have different names. <<<<<<< LAO ======= -- The Way of Lao-Tzu, tr. Wing-tsit Chan >>>>>>> TAO """) class TestMerge3(TestCase): def log(self, msg): pass def test_no_changes(self): """No conflicts because nothing changed""" m3 = Merge3(['aaa', 'bbb'], ['aaa', 'bbb'], ['aaa', 'bbb']) self.assertEquals(m3.find_unconflicted(), [(0, 2)]) self.assertEquals(list(m3.find_sync_regions()), [(0, 2, 0, 2, 0, 2), (2, 2, 2, 2, 2, 2)]) self.assertEquals(list(m3.merge_regions()), [('unchanged', 0, 2)]) self.assertEquals(list(m3.merge_groups()), [('unchanged', ['aaa', 'bbb'])]) def test_front_insert(self): m3 = Merge3(['zz'], ['aaa', 'bbb', 'zz'], ['zz']) # todo: should use a sentinel at end as from get_matching_blocks # to match without zz self.assertEquals(list(m3.find_sync_regions()), [(0, 1, 2, 3, 0, 1), (1, 1, 3, 3, 1, 1)]) self.assertEquals(list(m3.merge_regions()), [('a', 0, 2), ('unchanged', 0, 1)]) self.assertEquals(list(m3.merge_groups()), [('a', ['aaa', 'bbb']), ('unchanged', ['zz'])]) def test_null_insert(self): m3 = Merge3([], ['aaa', 'bbb'], []) # todo: should use a sentinel at end as from get_matching_blocks # to match without zz self.assertEquals(list(m3.find_sync_regions()), [(0, 0, 2, 2, 0, 0)]) self.assertEquals(list(m3.merge_regions()), [('a', 0, 2)]) self.assertEquals(list(m3.merge_lines()), ['aaa', 'bbb']) def test_no_conflicts(self): """No conflicts because only one side changed""" m3 = Merge3(['aaa', 'bbb'], ['aaa', '111', 'bbb'], ['aaa', 'bbb']) self.assertEquals(m3.find_unconflicted(), [(0, 1), (1, 2)]) self.assertEquals(list(m3.find_sync_regions()), [(0, 1, 0, 1, 0, 1), (1, 2, 2, 3, 1, 2), (2, 2, 3, 3, 2, 2)]) self.assertEquals(list(m3.merge_regions()), [('unchanged', 0, 1), ('a', 1, 2), ('unchanged', 1, 2)]) def test_append_a(self): m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', 'bbb\n', '222\n'], ['aaa\n', 'bbb\n']) self.assertEquals(''.join(m3.merge_lines()), 'aaa\nbbb\n222\n') def test_append_b(self): m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', 'bbb\n'], ['aaa\n', 'bbb\n', '222\n']) self.assertEquals(''.join(m3.merge_lines()), 'aaa\nbbb\n222\n') def test_append_agreement(self): m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', 'bbb\n', '222\n'], ['aaa\n', 'bbb\n', '222\n']) self.assertEquals(''.join(m3.merge_lines()), 'aaa\nbbb\n222\n') def test_append_clash(self): m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', 'bbb\n', '222\n'], ['aaa\n', 'bbb\n', '333\n']) ml = m3.merge_lines(name_a='a', name_b='b', start_marker='<<', mid_marker='--', end_marker='>>') self.assertEquals(''.join(ml), 'aaa\n' 'bbb\n' '<< a\n' '222\n' '--\n' '333\n' '>> b\n' ) def test_insert_agreement(self): m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', '222\n', 'bbb\n'], ['aaa\n', '222\n', 'bbb\n']) ml = m3.merge_lines(name_a='a', name_b='b', start_marker='<<', mid_marker='--', end_marker='>>') self.assertEquals(''.join(ml), 'aaa\n222\nbbb\n') def test_insert_clash(self): """Both try to insert lines in the same place.""" m3 = Merge3(['aaa\n', 'bbb\n'], ['aaa\n', '111\n', 'bbb\n'], ['aaa\n', '222\n', 'bbb\n']) self.assertEquals(m3.find_unconflicted(), [(0, 1), (1, 2)]) self.assertEquals(list(m3.find_sync_regions()), [(0, 1, 0, 1, 0, 1), (1, 2, 2, 3, 2, 3), (2, 2, 3, 3, 3, 3)]) self.assertEquals(list(m3.merge_regions()), [('unchanged', 0, 1), ('conflict', 1, 1, 1, 2, 1, 2), ('unchanged', 1, 2)]) self.assertEquals(list(m3.merge_groups()), [('unchanged', ['aaa\n']), ('conflict', [], ['111\n'], ['222\n']), ('unchanged', ['bbb\n']), ]) ml = m3.merge_lines(name_a='a', name_b='b', start_marker='<<', mid_marker='--', end_marker='>>') self.assertEquals(''.join(ml), '''aaa << a 111 -- 222 >> b bbb ''') def test_replace_clash(self): """Both try to insert lines in the same place.""" m3 = Merge3(['aaa', '000', 'bbb'], ['aaa', '111', 'bbb'], ['aaa', '222', 'bbb']) self.assertEquals(m3.find_unconflicted(), [(0, 1), (2, 3)]) self.assertEquals(list(m3.find_sync_regions()), [(0, 1, 0, 1, 0, 1), (2, 3, 2, 3, 2, 3), (3, 3, 3, 3, 3, 3)]) def test_replace_multi(self): """Replacement with regions of different size.""" m3 = Merge3(['aaa', '000', '000', 'bbb'], ['aaa', '111', '111', '111', 'bbb'], ['aaa', '222', '222', '222', '222', 'bbb']) self.assertEquals(m3.find_unconflicted(), [(0, 1), (3, 4)]) self.assertEquals(list(m3.find_sync_regions()), [(0, 1, 0, 1, 0, 1), (3, 4, 4, 5, 5, 6), (4, 4, 5, 5, 6, 6)]) def test_merge_poem(self): """Test case from diff3 manual""" m3 = Merge3(TZU, LAO, TAO) ml = list(m3.merge_lines('LAO', 'TAO')) self.log('merge result:') self.log(''.join(ml)) self.assertEquals(ml, MERGED_RESULT) def test_minimal_conflicts_common(self): """Reprocessing""" base_text = ("a\n" * 20).splitlines(True) this_text = ("a\n"*10+"b\n" * 10).splitlines(True) other_text = ("a\n"*10+"c\n"+"b\n" * 8 + "c\n").splitlines(True) m3 = Merge3(base_text, other_text, this_text) m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True) merged_text = "".join(list(m_lines)) optimal_text = ("a\n" * 10 + "<<<<<<< OTHER\nc\n=======\n" + ">>>>>>> THIS\n" + 8* "b\n" + "<<<<<<< OTHER\nc\n=======\n" + 2* "b\n" + ">>>>>>> THIS\n") self.assertEquals(optimal_text, merged_text) def test_minimal_conflicts_unique(self): def add_newline(s): """Add a newline to each entry in the string""" return [(x+'\n') for x in s] base_text = add_newline("abcdefghijklm") this_text = add_newline("abcdefghijklmNOPQRSTUVWXYZ") other_text = add_newline("abcdefghijklm1OPQRSTUVWXY2") m3 = Merge3(base_text, other_text, this_text) m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True) merged_text = "".join(list(m_lines)) optimal_text = ''.join(add_newline("abcdefghijklm") + ["<<<<<<< OTHER\n1\n=======\nN\n>>>>>>> THIS\n"] + add_newline('OPQRSTUVWXY') + ["<<<<<<< OTHER\n2\n=======\nZ\n>>>>>>> THIS\n"] ) self.assertEquals(optimal_text, merged_text) def test_minimal_conflicts_nonunique(self): def add_newline(s): """Add a newline to each entry in the string""" return [(x+'\n') for x in s] base_text = add_newline("abacddefgghij") this_text = add_newline("abacddefgghijkalmontfprz") other_text = add_newline("abacddefgghijknlmontfprd") m3 = Merge3(base_text, other_text, this_text) m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True) merged_text = "".join(list(m_lines)) optimal_text = ''.join(add_newline("abacddefgghijk") + ["<<<<<<< OTHER\nn\n=======\na\n>>>>>>> THIS\n"] + add_newline('lmontfpr') + ["<<<<<<< OTHER\nd\n=======\nz\n>>>>>>> THIS\n"] ) self.assertEquals(optimal_text, merged_text) def test_reprocess_and_base(self): """Reprocessing and showing base breaks correctly""" base_text = ("a\n" * 20).splitlines(True) this_text = ("a\n"*10+"b\n" * 10).splitlines(True) other_text = ("a\n"*10+"c\n"+"b\n" * 8 + "c\n").splitlines(True) m3 = Merge3(base_text, other_text, this_text) m_lines = m3.merge_lines('OTHER', 'THIS', reprocess=True, base_marker='|||||||') self.assertRaises(CantReprocessAndShowBase, list, m_lines) def test_binary(self): self.assertRaises(util.Abort, Merge3, ['\x00'], ['a'], ['b']) def test_dos_text(self): base_text = 'a\r\n' this_text = 'b\r\n' other_text = 'c\r\n' m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True), this_text.splitlines(True)) m_lines = m3.merge_lines('OTHER', 'THIS') self.assertEqual('<<<<<<< OTHER\r\nc\r\n=======\r\nb\r\n' '>>>>>>> THIS\r\n'.splitlines(True), list(m_lines)) def test_mac_text(self): base_text = 'a\r' this_text = 'b\r' other_text = 'c\r' m3 = Merge3(base_text.splitlines(True), other_text.splitlines(True), this_text.splitlines(True)) m_lines = m3.merge_lines('OTHER', 'THIS') self.assertEqual('<<<<<<< OTHER\rc\r=======\rb\r' '>>>>>>> THIS\r'.splitlines(True), list(m_lines)) if __name__ == '__main__': # hide the timer import time orig = time.time try: time.time = lambda: 0 unittest.main() finally: time.time = orig