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- Committer: David Allouche
- Date: 2006-05-08 13:03:59 UTC
- Revision ID: david.allouche@canonical.com-20060508130359-f9a471d0d0b1dcf2
remove --robust, pyflakes fixes, update README
Thanks to Robert Collins' new graphing logic, the --robust option is
no longer needed to prevent extreme graph width on broken branches.
That allows removing a bunch of flaky code.
Remove a few spurious imports (thanks to pyflakes).
Update README to request bzr>=0.8.
Thanks to Robert Collins' new graphing logic, the --robust option is
no longer needed to prevent extreme graph width on broken branches.
That allows removing a bunch of flaky code.
Remove a few spurious imports (thanks to pyflakes).
Update README to request bzr>=0.8.
- files added:
- .bzrignore
- files removed:
- .bzrignore
- annotate
- branchview
- icons
- olive
- po
- preferences
- tests
- viz
- files renamed:
- viz/__init__.py => __init__.py
- viz/branchwin.py => branchwin.py
- diff.py => diffwin.py
- branchview/linegraph.py => graph.py
- branchview/graphcell.py => graphcell.py
- files modified:
- AUTHORS
added
removed
graph.py
1
# -*- coding: UTF-8 -*-
2
"""Directed graph production.
3
4
This module contains the code to produce an ordered directed graph of a
5
bzr branch, such as we display in the tree view at the top of the bzrk
6
window.
7
"""
8
9
__copyright__ = "Copyright © 2005 Canonical Ltd."
10
__author__ = "Scott James Remnant <scott@ubuntu.com>"
11
12
from bzrlib.revision import NULL_REVISION
13
from bzrlib.tsort import merge_sort
14
15
def linegraph(repository, start_revs, maxnum, broken_line_length = None,
16
graph_data = True, mainline_only = False):
17
"""Produce a directed graph of a bzr repository.
18
19
Returns a tuple of (line_graph, revid_index, columns_len) where
20
* line_graph is a list of tuples of (revid,
21
node,
22
lines,
23
parents,
24
children,
25
revno_sequence),
26
* revid_index is a dict of each revision with the key being the revid, and
27
the value the row index, and
28
* columns_len is the number of columns need to draw the line graph.
29
30
31
Node is a tuple of (column, colour) with column being a zero-indexed
32
column number of the graph that this revision represents and colour
33
being a zero-indexed colour (which doesn't specify any actual colour
34
in particular) to draw the node in.
35
36
Lines is a list of tuples which represent lines you should draw away
37
from the revision, if you also need to draw lines into the revision
38
you should use the lines list from the previous iteration. Each
39
typle in the list is in the form (start, end, colour) with start and
40
end being zero-indexed column numbers and colour as in node.
41
42
It's up to you how to actually draw the nodes and lines (straight,
43
curved, kinked, etc.) and to pick the actual colours for each index.
44
"""
45
46
graph = repository.get_graph()
47
graph_parents = {}
48
ghosts = set()
49
graph_children = {}
50
for (revid, parent_revids) in graph.iter_ancestry(start_revs):
51
if parent_revids is None:
52
ghosts.add(revid)
53
continue
54
if parent_revids == (NULL_REVISION,):
55
graph_parents[revid] = ()
56
else:
57
graph_parents[revid] = parent_revids
58
for parent in parent_revids:
59
graph_children.setdefault(parent, []).append(revid)
60
graph_children.setdefault(revid, [])
61
for ghost in ghosts:
62
for ghost_child in graph_children[ghost]:
63
graph_parents[ghost_child] = [p for p in graph_parents[ghost_child]
64
if p not in ghosts]
65
graph_parents["top:"] = start_revs
66
67
if len(graph_parents)>0:
68
merge_sorted_revisions = merge_sort(
69
graph_parents,
70
"top:",
71
generate_revno=True)
72
else:
73
merge_sorted_revisions = ()
74
75
if mainline_only:
76
merge_sorted_revisions = [elem for elem in merge_sorted_revisions \
77
if len(elem[3])==1 ]
78
79
assert merge_sorted_revisions[0][1] == "top:"
80
merge_sorted_revisions = merge_sorted_revisions[1:]
81
82
revid_index = {}
83
revno_index = {}
84
85
# This will hold an item for each "branch". For a revisions, the revsion
86
# number less the least significant digit is the branch_id, and used as the
87
# key for the dict. Hence revision with the same revsion number less the
88
# least significant digit are considered to be in the same branch line.
89
# e.g.: for revisions 290.12.1 and 290.12.2, the branch_id would be 290.12,
90
# and these two revisions will be in the same branch line. Each value is
91
# a list of rev_indexes in the branch.
92
branch_lines = {}
93
94
linegraph = []
95
96
for (rev_index, (sequence_number,
97
revid,
98
merge_depth,
99
revno_sequence,
100
end_of_merge)) in enumerate(merge_sorted_revisions):
101
if maxnum and rev_index >= maxnum:
102
break
103
revid_index[revid] = rev_index
104
105
parents = graph_parents[revid]
106
linegraph.append([revid,
107
None,
108
[],
109
parents,
110
None,
111
revno_sequence])
112
113
if graph_data:
114
revno_index[revno_sequence] = rev_index
115
116
branch_id = revno_sequence[0:-1]
117
118
branch_line = None
119
if branch_id not in branch_lines:
120
branch_line = []
121
branch_lines[branch_id] = branch_line
122
else:
123
branch_line = branch_lines[branch_id]
124
125
branch_line.append(rev_index)
126
127
if graph_data:
128
branch_ids = branch_lines.keys()
129
130
def branch_id_cmp(x, y):
131
"""Compaire branch_id's first by the number of digits, then reversed
132
by their value"""
133
len_x = len(x)
134
len_y = len(y)
135
if len_x == len_y:
136
return -cmp(x, y)
137
return cmp(len_x, len_y)
138
139
branch_ids.sort(branch_id_cmp)
140
# This will hold a tuple of (child_index, parent_index, col_index) for each
141
# line that needs to be drawn. If col_index is not none, then the line is
142
# drawn along that column, else the the line can be drawn directly between
143
# the child and parent because either the child and parent are in the same
144
# branch line, or the child and parent are 1 row apart.
145
lines = []
146
empty_column = [False for i in range(len(graph_parents))]
147
# This will hold a bit map for each cell. If the cell is true, then the
148
# cell allready contains a node or line. This use when deciding what column
149
# to place a branch line or line in, without it overlaping something else.
150
columns = [list(empty_column)]
151
152
153
for branch_id in branch_ids:
154
branch_line = branch_lines[branch_id]
155
156
# Find the col_index for the direct parent branch. This will be the
157
# starting point when looking for a free column.
158
parent_col_index = 0
159
parent_index = None
160
if len(branch_id) > 1:
161
parent_revno = branch_id[0:-1]
162
if parent_revno in revno_index:
163
parent_index = revno_index[parent_revno]
164
parent_node = linegraph[parent_index][1]
165
if parent_node:
166
parent_col_index = parent_node[0]
167
168
169
col_search_order = _branch_line_col_search_order(columns,
170
parent_col_index)
171
color = reduce(lambda x, y: x+y, branch_id, 0)
172
cur_cont_line = []
173
174
line_range = []
175
last_rev_index = None
176
for rev_index in branch_line:
177
if last_rev_index:
178
if broken_line_length and \
179
rev_index - last_rev_index > broken_line_length:
180
line_range.append(last_rev_index+1)
181
line_range.append(rev_index-1)
182
else:
183
line_range.extend(range(last_rev_index+1, rev_index))
184
185
line_range.append(rev_index)
186
last_rev_index = rev_index
187
188
if parent_index:
189
if broken_line_length and \
190
parent_index - last_rev_index > broken_line_length:
191
line_range.append(last_rev_index+1)
192
else:
193
line_range.extend(range(last_rev_index+1, parent_index))
194
195
col_index = _find_free_column(columns,
196
empty_column,
197
col_search_order,
198
line_range)
199
node = (col_index, color)
200
for rev_index in branch_line:
201
linegraph[rev_index][1] = node
202
columns[col_index][rev_index] = True
203
204
for rev_index in branch_line:
205
(sequence_number,
206
revid,
207
merge_depth,
208
revno_sequence,
209
end_of_merge) = merge_sorted_revisions[rev_index]
210
211
linegraph[rev_index][4] = graph_children[revid]
212
col_index = linegraph[rev_index][1][0]
213
214
for parent_revid in graph_parents[revid]:
215
if parent_revid in revid_index:
216
217
parent_index = revid_index[parent_revid]
218
parent_node = linegraph[parent_index][1]
219
if parent_node:
220
parent_col_index = parent_node[0]
221
else:
222
parent_col_index = None
223
col_search_order = \
224
_line_col_search_order(columns,
225
parent_col_index,
226
col_index)
227
228
# If this line is really long, break it.
229
if len(branch_id) > 0 and \
230
broken_line_length and \
231
parent_index - rev_index > broken_line_length:
232
child_line_col_index = \
233
_find_free_column(columns,
234
empty_column,
235
col_search_order,
236
(rev_index + 1,))
237
_mark_column_as_used(columns,
238
child_line_col_index,
239
(rev_index + 1,))
240
241
# Recall _line_col_search_order to reset it back to
242
# the beging.
243
col_search_order = \
244
_line_col_search_order(columns,
245
parent_col_index,
246
col_index)
247
parent_col_line_index = \
248
_find_free_column(columns,
249
empty_column,
250
col_search_order,
251
(parent_index - 1,))
252
_mark_column_as_used(columns,
253
parent_col_line_index,
254
(parent_index - 1,))
255
lines.append((rev_index,
256
parent_index,
257
(child_line_col_index,
258
parent_col_line_index)))
259
else :
260
line_col_index = col_index
261
if parent_index - rev_index >1:
262
line_range = range(rev_index + 1, parent_index)
263
line_col_index = \
264
_find_free_column(columns,
265
empty_column,
266
col_search_order,
267
line_range)
268
_mark_column_as_used(columns,
269
line_col_index,
270
line_range)
271
lines.append((rev_index,
272
parent_index,
273
(line_col_index,)))
274
275
for (child_index, parent_index, line_col_indexes) in lines:
276
(child_col_index, child_color) = linegraph[child_index][1]
277
(parent_col_index, parent_color) = linegraph[parent_index][1]
278
279
if len(line_col_indexes) == 1:
280
if parent_index - child_index == 1:
281
linegraph[child_index][2].append(
282
(child_col_index,
283
parent_col_index,
284
parent_color))
285
else:
286
# line from the child's column to the lines column
287
linegraph[child_index][2].append(
288
(child_col_index,
289
line_col_indexes[0],
290
parent_color))
291
# lines down the line's column
292
for line_part_index in range(child_index+1, parent_index-1):
293
linegraph[line_part_index][2].append(
294
(line_col_indexes[0],
295
line_col_indexes[0],
296
parent_color))
297
# line from the line's column to the parent's column
298
linegraph[parent_index-1][2].append(
299
(line_col_indexes[0],
300
parent_col_index,
301
parent_color))
302
else:
303
# Broken line
304
# line from the child's column to the lines column
305
linegraph[child_index][2].append(
306
(child_col_index,
307
line_col_indexes[0],
308
parent_color))
309
# Broken line end
310
linegraph[child_index+1][2].append(
311
(line_col_indexes[0],
312
None,
313
parent_color))
314
315
# Broken line end
316
linegraph[parent_index-2][2].append(
317
(None,
318
line_col_indexes[1],
319
parent_color))
320
# line from the line's column to the parent's column
321
linegraph[parent_index-1][2].append(
322
(line_col_indexes[1],
323
parent_col_index,
324
parent_color))
325
return (linegraph, revid_index, len(columns))
326
else:
327
return (linegraph, revid_index, 0)
328
329
330
def _branch_line_col_search_order(columns, parent_col_index):
331
for col_index in range(parent_col_index, len(columns)):
332
yield col_index
333
for col_index in range(parent_col_index-1, -1, -1):
334
yield col_index
335
336
def _line_col_search_order(columns, parent_col_index, child_col_index):
337
if parent_col_index is not None:
338
max_index = max(parent_col_index, child_col_index)
339
min_index = min(parent_col_index, child_col_index)
340
for col_index in range(max_index, min_index -1, -1):
341
yield col_index
342
else:
343
max_index = child_col_index
344
min_index = child_col_index
345
yield child_col_index
346
i = 1
347
while max_index + i < len(columns) or \
348
min_index - i > -1:
349
if max_index + i < len(columns):
350
yield max_index + i
351
if min_index - i > -1:
352
yield min_index - i
353
i += 1
354
355
def _find_free_column(columns, empty_column, col_search_order, line_range):
356
for col_index in col_search_order:
357
column = columns[col_index]
358
has_overlaping_line = False
359
for row_index in line_range:
360
if column[row_index]:
361
has_overlaping_line = True
362
break
363
if not has_overlaping_line:
364
break
365
else:
366
col_index = len(columns)
367
column = list(empty_column)
368
columns.append(column)
369
return col_index
370
371
def _mark_column_as_used(columns, col_index, line_range):
372
column = columns[col_index]
373
for row_index in line_range:
374
column[row_index] = True
375
376
def same_branch(a, b):
377
"""Return whether we think revisions a and b are on the same branch."""
378
if len(a.parent_ids) == 1:
379
# Defacto same branch if only parent
380
return True
381
elif a.committer == b.committer:
382
# Same committer so may as well be
383
return True
384
else:
385
return False
1
#!/usr/bin/python
2
# -*- coding: UTF-8 -*-
3
"""Directed graph production.
4
5
This module contains the code to produce an ordered directed graph of a
6
bzr branch, such as we display in the tree view at the top of the bzrk
7
window.
8
"""
9
10
__copyright__ = "Copyright © 2005 Canonical Ltd."
11
__author__ = "Scott James Remnant <scott@ubuntu.com>"
12
13
14
from bzrlib.tsort import merge_sort
15
16
17
class DummyRevision(object):
18
"""Dummy bzr revision.
19
20
Sometimes, especially in older bzr branches, a revision is referenced
21
as the parent of another but not actually present in the branch's store.
22
When this happens we use an instance of this class instead of the real
23
Revision object (which we can't get).
24
"""
25
26
def __init__(self, revid):
27
self.revision_id = revid
28
self.parent_ids = []
29
self.committer = None
30
self.message = self.revision_id
31
32
33
class RevisionProxy(object):
34
"""A revision proxy object.
35
36
This will demand load the revision it represents when the committer or
37
message attributes are accessed in order to populate them. It is
38
constructed with the revision id and parent_ids list and a repository
39
object to request the revision from when needed.
40
"""
41
42
def __init__(self, revid, parent_ids, repository):
43
self.revision_id = revid
44
self.parent_ids = parent_ids
45
self._repository = repository
46
self._revision = None
47
48
def _get_attribute_getter(attr):
49
def get_attribute(self):
50
if self._revision is None:
51
self._load()
52
return getattr(self._revision, attr)
53
return get_attribute
54
committer = property(_get_attribute_getter('committer'))
55
message = property(_get_attribute_getter('message'))
56
properties = property(_get_attribute_getter('properties'))
57
timestamp = property(_get_attribute_getter('timestamp'))
58
timezone = property(_get_attribute_getter('timezone'))
59
60
def _load(self):
61
"""Load the revision object."""
62
self._revision = self._repository.get_revision(self.revision_id)
63
64
65
class DistanceMethod(object):
66
67
def __init__(self, branch, start):
68
self.branch = branch
69
self.start = start
70
self.revisions = {}
71
self.children = {}
72
self.children_of_id = {start: set()}
73
self.parent_ids_of = {}
74
self.colours = { start: 0 }
75
self.last_colour = 0
76
self.direct_parent_of = {}
77
self.graph = {}
78
79
def fill_caches(self):
80
# FIXME: look at using repository.get_revision_graph_with_ghosts - RBC.
81
graph = self.branch.repository.get_revision_graph_with_ghosts([self.start])
82
for revid in graph.ghosts:
83
self.cache_revision(DummyRevision(revid))
84
for revid, parents in graph.get_ancestors().items():
85
self.cache_revision(RevisionProxy(revid, parents, self.branch.repository))
86
87
def cache_revision(self, revision):
88
"Set the caches for a newly retrieved revision."""
89
revid = revision.revision_id
90
# Build a revision cache
91
self.revisions[revid] = revision
92
# Build a children dictionary
93
for parent_id in revision.parent_ids:
94
self.children_of_id.setdefault(parent_id, set()).add(revision)
95
# Build a parents dictionnary, where redundant parents will be removed,
96
# and that will be passed along tothe rest of program.
97
if len(revision.parent_ids) != len(set(revision.parent_ids)):
98
# fix the parent_ids list.
99
parent_ids = []
100
parent_ids_set = set()
101
for parent_id in revision.parent_ids:
102
if parent_id in parent_ids_set:
103
continue
104
parent_ids.append(parent_id)
105
parent_ids_set.add(parent_id)
106
revision.parent_ids = parent_ids
107
self.parent_ids_of[revision] = list(revision.parent_ids)
108
self.graph[revid] = revision.parent_ids
109
110
def make_children_map(self):
111
revisions = self.revisions
112
return dict((revisions[revid], c)
113
for (revid, c) in self.children_of_id.iteritems())
114
115
def sort_revisions(self, sorted_revids, maxnum):
116
revisions = self.revisions
117
parent_ids_of = self.parent_ids_of
118
children_of_id = self.children_of_id
119
# Try to compact sequences of revisions on the same branch.
120
distances = {}
121
skipped_revids = []
122
expected_id = sorted_revids[0]
123
pending_ids = []
124
while True:
125
revid = sorted_revids.pop(0)
126
if revid != expected_id:
127
skipped_revids.append(revid)
128
continue
129
revision = revisions[revid]
130
for child in children_of_id[revid]:
131
# postpone if any child is missing
132
if child.revision_id not in distances:
133
if expected_id not in pending_ids:
134
pending_ids.append(expected_id)
135
expected_id = pending_ids.pop(0)
136
skipped_revids.append(revid)
137
sorted_revids[:0] = skipped_revids
138
del skipped_revids[:]
139
break
140
else:
141
# all children are here, push!
142
distances[revid] = len(distances)
143
if maxnum is not None and len(distances) > maxnum:
144
# bail out early if a limit was specified
145
sorted_revids[:0] = skipped_revids
146
for revid in sorted_revids:
147
distances[revid] = len(distances)
148
break
149
# all parents will need to be pushed as soon as possible
150
for parent in parent_ids_of[revision]:
151
if parent not in pending_ids:
152
pending_ids.insert(0, parent)
153
if not pending_ids:
154
break
155
expected_id = pending_ids.pop(0)
156
# if the next expected revid has already been skipped, requeue
157
# the skipped ids, except those that would go right back to the
158
# skipped list.
159
if expected_id in skipped_revids:
160
pos = skipped_revids.index(expected_id)
161
sorted_revids[:0] = skipped_revids[pos:]
162
del skipped_revids[pos:]
163
self.distances = distances
164
return sorted(distances, key=distances.get)
165
166
def choose_colour(self, revid):
167
revision = self.revisions[revid]
168
children_of_id = self.children_of_id
169
parent_ids_of = self.parent_ids_of
170
colours = self.colours
171
# choose colour
172
the_children = children_of_id[revid]
173
if len(the_children) == 1:
174
[child] = the_children
175
if len(parent_ids_of[child]) == 1:
176
# one-one relationship between parent and child, same
177
# colour
178
colours[revid] = colours[child.revision_id]
179
else:
180
self.choose_colour_one_child(revision, child)
181
else:
182
self.choose_colour_many_children(revision, the_children)
183
184
def choose_colour_one_child(self, revision, child):
185
revid = revision.revision_id
186
direct_parent_of = self.direct_parent_of
187
revisions = self.revisions
188
# one child with multiple parents, the first parent with
189
# the same committer gets the colour
190
direct_parent = direct_parent_of.get(child)
191
if direct_parent is None:
192
# if it has not been found yet, find it now and remember
193
for parent_id in self.parent_ids_of[child]:
194
parent_revision = revisions[parent_id]
195
if parent_revision.committer == child.committer:
196
# found the first parent with the same committer
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direct_parent = parent_revision
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direct_parent_of[child] = direct_parent
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break
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if direct_parent == revision:
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self.colours[revid] = self.colours[child.revision_id]
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else:
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self.colours[revid] = self.last_colour = self.last_colour + 1
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def choose_colour_many_children(self, revision, the_children):
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"""Colour revision revision."""
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revid = revision.revision_id
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direct_parent_of = self.direct_parent_of
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# multiple children, get the colour of the last displayed child
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# with the same committer which does not already have its colour
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# taken
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available = {}
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for child in the_children:
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if child.committer != revision.committer:
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continue
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direct_parent = direct_parent_of.get(child)
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if direct_parent == revision:
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self.colours[revid] = self.colours[child.revision_id]
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break
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# FIXME: Colouring based on whats been displayed MUST be done with
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# knowledge of the revisions being output.
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# until the refactoring to fold graph() into this more compactly is
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# done, I've disabled this reuse. RBC 20060403
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# if direct_parent is None:
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# available[child] = distances[child.revision_id]
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# .. it will be something like available[child] = \
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# revs[child.revision_id][0] - which is the sequence number
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else:
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if available:
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sorted_children = sorted(available, key=available.get)
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child = sorted_children[-1]
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direct_parent_of[child] = revision
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self.colours[revid] = self.colours[child.revision_id]
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else:
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# no candidate children is available, pick the next
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# colour
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self.colours[revid] = self.last_colour = self.last_colour + 1
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239
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def distances(branch, start, maxnum):
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"""Sort the revisions.
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Traverses the branch revision tree starting at start and produces an
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ordered list of revisions such that a revision always comes after
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any revision it is the parent of.
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Returns a tuple of (revids, revisions, colours, children)
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"""
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distance = DistanceMethod(branch, start)
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distance.fill_caches()
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distance.merge_sorted = merge_sort(distance.graph, distance.start)
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children = distance.make_children_map()
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for seq, revid, merge_depth, end_of_merge in distance.merge_sorted:
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distance.choose_colour(revid)
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if maxnum is not None:
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print 'FIXME: maxnum disabled.'
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revisions = distance.revisions
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colours = distance.colours
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parent_ids_of = distance.parent_ids_of
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return (revisions, colours, children, parent_ids_of, distance.merge_sorted)
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def graph(revisions, colours, merge_sorted):
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"""Produce a directed graph of a bzr branch.
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For each revision it then yields a tuple of (revision, node, lines).
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If the revision is only referenced in the branch and not present in the
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store, revision will be a DummyRevision object, otherwise it is the bzr
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Revision object with the meta-data for the revision.
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Node is a tuple of (column, colour) with column being a zero-indexed
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column number of the graph that this revision represents and colour
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being a zero-indexed colour (which doesn't specify any actual colour
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in particular) to draw the node in.
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Lines is a list of tuples which represent lines you should draw away
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from the revision, if you also need to draw lines into the revision
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you should use the lines list from the previous iteration. Each
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typle in the list is in the form (start, end, colour) with start and
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end being zero-indexed column numbers and colour as in node.
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It's up to you how to actually draw the nodes and lines (straight,
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curved, kinked, etc.) and to pick the actual colours for each index.
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"""
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if not len(merge_sorted):
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return
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# split merge_sorted into a map:
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revs = {}
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# FIXME: get a hint on this from the merge_sorted data rather than
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# calculating it ourselves
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# mapping from rev_id to the sequence number of the next lowest rev
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next_lower_rev = {}
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# mapping from rev_id to next-in-branch-revid - may be None for end
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# of branch
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next_branch_revid = {}
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# the stack we are in in the sorted data for determining which
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# next_lower_rev to set. It is a stack which has one list at each
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# depth - the ids at that depth that need the same id allocated.
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current_stack = [[]]
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for seq, revid, indent, end_merge in merge_sorted:
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revs[revid] = (seq, indent, end_merge)
304
if indent == len(current_stack):
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# new merge group starts
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current_stack.append([revid])
307
elif indent == len(current_stack) - 1:
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# part of the current merge group
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current_stack[-1].append(revid)
310
else:
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# end of a merge group
312
while current_stack[-1]:
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stack_rev_id = current_stack[-1].pop()
314
# record the next lower rev for this rev:
315
next_lower_rev[stack_rev_id] = seq
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# if this followed a non-end-merge rev in this group note that
317
if len(current_stack[-1]):
318
if not revs[current_stack[-1][-1]][2]:
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next_branch_revid[current_stack[-1][-1]] = stack_rev_id
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current_stack.pop()
321
# append to the now-current merge group
322
current_stack[-1].append(revid)
323
# assign a value to all the depth 0 revisions
324
while current_stack[-1]:
325
stack_rev_id = current_stack[-1].pop()
326
# record the next lower rev for this rev:
327
next_lower_rev[stack_rev_id] = len(merge_sorted)
328
# if this followed a non-end-merge rev in this group note that
329
if len(current_stack[-1]):
330
if not revs[current_stack[-1][-1]][2]:
331
next_branch_revid[current_stack[-1][-1]] = stack_rev_id
332
333
# a list of the current revisions we are drawing lines TO indicating
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# the sequence of their lines on the screen.
335
# i.e. [A, B, C] means that the line to A, to B, and to C are in
336
# (respectively), 0, 1, 2 on the screen.
337
hanging = [merge_sorted[0][1]]
338
for seq, revid, indent, end_merge in merge_sorted:
339
# a list of the lines to draw: their position in the
340
# previous row, their position in this row, and the colour
341
# (which is the colour they are routing to).
342
lines = []
343
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new_hanging = []
345
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for h_idx, hang in enumerate(hanging):
347
# one of these will be the current lines node:
348
# we are drawing a line. h_idx
349
if hang == revid:
350
# we have found the current lines node
351
node = (h_idx, colours[revid])
352
353
# note that we might have done the main parent
354
drawn_parents = set()
355
356
def draw_line(from_idx, to_idx, revision_id):
357
try:
358
n_idx = new_hanging.index(revision_id)
359
except ValueError:
360
# force this to be vertical at the place this rev was
361
# drawn.
362
new_hanging.insert(to_idx, revision_id)
363
n_idx = to_idx
364
lines.append((from_idx, n_idx, colours[revision_id]))
365
366
367
# we want to draw a line to the next commit on 'this' branch
368
if not end_merge:
369
# drop this line first.
370
parent_id = next_branch_revid[revid]
371
draw_line(h_idx, h_idx, parent_id)
372
# we have drawn this parent
373
drawn_parents.add(parent_id)
374
else:
375
# this is the last revision in a 'merge', show where it came from
376
if len(revisions[revid].parent_ids) > 1:
377
# having > 1
378
# parents means this commit was a merge, and being
379
# the end point of a merge group means that all
380
# the parent revisions were merged into branches
381
# to the left of this before this was committed
382
# - so we want to show this as a new branch from
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# those revisions.
384
# to do this, we show the parent with the lowest
385
# sequence number, which is the one that this
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# branch 'spawned from', and no others.
387
# If this sounds like a problem, remember that:
388
# if the parent was not already in our mainline
389
# it would show up as a merge into this making
390
# this not the end of a merge-line.
391
lowest = len(merge_sorted)
392
for parent_id in revisions[revid].parent_ids:
393
if revs[parent_id][0] < lowest:
394
lowest = revs[parent_id][0]
395
assert lowest != len(merge_sorted)
396
draw_line(h_idx, len(new_hanging), merge_sorted[lowest][1])
397
drawn_parents.add(merge_sorted[lowest][1])
398
elif len(revisions[revid].parent_ids) == 1:
399
# only one parent, must show this link to be useful.
400
parent_id = revisions[revid].parent_ids[0]
401
draw_line(h_idx, len(new_hanging), parent_id)
402
drawn_parents.add(parent_id)
403
404
# what do we want to draw lines to from here:
405
# each parent IF its relevant.
406
#
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# Now we need to hang its parents, we put them at the point
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# the old column was so anything to the right of this has
409
# to move outwards to make room. We also try and collapse
410
# hangs to keep the graph small.
411
# RBC: we do not draw lines to parents that were already merged
412
# unless its the last revision in a merge group.
413
for parent_id in revisions[revid].parent_ids:
414
if parent_id in drawn_parents:
415
continue
416
parent_seq = revs[parent_id][0]
417
parent_depth = revs[parent_id][1]
418
if parent_depth == indent + 1:
419
# the parent was a merge into this branch
420
# determine if it was already merged into the mainline
421
# via a different merge:
422
# if all revisions between us and parent_seq have a
423
# indent greater than there are no revisions with a lower indent than
424
# us.
425
# we do not use 'parent_depth < indent' because that would allow
426
# un-uniqueified merges to show up, and merge_sorted should take
427
# care of that for us (but does not trim the values)
428
if parent_seq < next_lower_rev[revid]:
429
draw_line(h_idx, len(new_hanging), parent_id)
430
elif parent_depth == indent and parent_seq == seq + 1:
431
# part of this branch
432
draw_line(h_idx, len(new_hanging), parent_id)
433
else:
434
# draw a line from the previous position of this line to the
435
# new position.
436
# h_idx is the old position.
437
# new_indent is the new position.
438
draw_line(h_idx, len(new_hanging), hang)
439
# we've calculated the row, assign new_hanging to hanging to setup for
440
# the next row
441
hanging = new_hanging
442
443
yield (revisions[revid], node, lines)
444
445
446
def same_branch(a, b):
447
"""Return whether we think revisions a and b are on the same branch."""
448
if len(a.parent_ids) == 1:
449
# Defacto same branch if only parent
450
return True
451
elif a.committer == b.committer:
452
# Same committer so may as well be
453
return True
454
else:
455
return False
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0