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refactoring and commenting for legibility (#82)

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This commit is contained in:
Adrian Sampson 2013-02-02 11:43:19 -08:00
parent 3ef423b735
commit f54d9bc096
1 changed files with 26 additions and 29 deletions
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55
beets/ui/commands.py
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@ -182,55 +182,52 @@ def show_change(cur_artist, cur_album, match):
pairs = match.mapping.items()
pairs.sort(key=lambda (_, track_info): track_info.index)
# The width of one column in track difference display.
col_width = (ui.term_width() - len(''.join([' * ', ' -> ']))) // 2
# Get each change as a colorized LHS and RHS value, and the length of the
# uncolored LHS value.
# Build up LHS and RHS for track difference display. The `lines`
# list contains ``(current title, new title, width)`` tuples where
# `width` is the length (in characters) of the uncolorized LHS.
lines = []
for item, track_info in pairs:
# Get display conditions.
tracks_differ = item.track not in \
(track_info.index, track_info.medium_index)
lengths_differ = item.length and track_info.length and \
abs(item.length - track_info.length) > 2.0
# Get raw LHS and RHS values.
# Titles.
if not item.title.strip():
# If there's no title, we use the filename.
cur_title = displayable_path(os.path.basename(item.path))
else:
cur_title = item.title.strip()
new_title = track_info.title
cur_track, new_track = unicode(item.track), format_index(track_info)
if lengths_differ:
cur_length = ui.human_seconds_short(item.length)
new_length = ui.human_seconds_short(track_info.length)
# Determine what to display and colorize.
length = len(cur_title)
lhs_width = len(cur_title)
lhs, rhs = ui.colordiff(cur_title, new_title)
if tracks_differ:
length += len(u' (%s)' % cur_track)
# Track number change.
if item.track not in \
(track_info.index, track_info.medium_index):
cur_track, new_track = unicode(item.track), format_index(track_info)
lhs_width += len(u' (%s)' % cur_track)
lhs_track, rhs_track = ui.colordiff(cur_track, new_track)
lhs += u' (%s)' % lhs_track
rhs += u' (%s)' % rhs_track
if lengths_differ:
length += len(u' (%s)' % cur_length)
# Length change.
if item.length and track_info.length and \
abs(item.length - track_info.length) > 2.0:
cur_length = ui.human_seconds_short(item.length)
new_length = ui.human_seconds_short(track_info.length)
lhs_width += len(u' (%s)' % cur_length)
lhs_length, rhs_length = ui.colordiff(cur_length, new_length)
lhs += u' (%s)' % lhs_length
rhs += u' (%s)' % rhs_length
if lhs != rhs:
lines.append((lhs, rhs, length))
lines.append((lhs, rhs, lhs_width))
# Print each track in two columns, or across two lines.
col_width = (ui.term_width() - len(''.join([' * ', ' -> ']))) // 2
if lines:
max_length = max([length for lhs, rhs, length in lines])
for lhs, rhs, length in lines:
if max_length > col_width:
max_width = max(w for _, _, w in lines)
for lhs, rhs, lhs_width in lines:
if max_width > col_width:
print_(u' * %s ->\n %s' % (lhs, rhs))
else:
pad = max_length - length
pad = max_width - lhs_width
print_(u' * %s%s -> %s' % (lhs, ' ' * pad, rhs))
# Missing and unmatched tracks.