def resolve_replace2(prev_item, replace, next_item, junk=[]):
items_actual = replace.items_actual
i = 0
phrases = []
# For a replace, distinguish between (sub)phrases that could be rearranged
# and that couldn't be rearranged.
# (simplified) example: Let 'items_actual' = "foo bar baz boo" and say the
# phrase "bar baz" could be rearranged and the phrase "boo" could be
# rearranged (to another position).
# So, compute the phrases ["foo", "bar baz", "boo"].
while i < len(items_actual):
item = items_actual[i]
if item.run:
rearr = Rearr()
while i < len(items_actual) and items_actual[i].run and items_actual[i].run == item.run:
rearr.append(items_actual[i])
i += 1
phrases.append(rearr)
else:
repl = Repl()
while i < len(items_actual) and not items_actual[i].run:
repl.append(items_actual[i])
i += 1
phrases.append(repl)
# Setup the diff.Replace and diff.Rearrange objects.
result = []
current_rearrange = None
current_replace = None
last_rearrange = None
for i in range(0, len(phrases)):
prev_phrase = phrases[i - 1] if i > 0 else None
phrase = phrases[i]
next_phrase = phrases[i + 1] if i < len(phrases) - 1 else None
if isinstance(phrase, Repl):
# Process the phrases that couldn't be rearranged:
if prev_phrase:
# prev_phrase is definitely a rearrange!
# Check if the rearrange position of prev phrase is followed by
# a junk item.
last_target_item = prev_phrase[-1].match
next_target_item = last_target_item.next
if util.ignore_item(next_target_item, junk):
continue
elif next_phrase:
# next_phrase is definitely a rearrange!
# Check if the rearrange position of prev phrase is preceded by
# a junk item.
first_target_item = next_phrase[0].match
prev_target_item = first_target_item.prev
if util.ignore_item(prev_target_item, junk):
continue
# Create new replace (consider remaining target items!).
if not current_replace:
current_replace = diff.Replace([], [], 0, 0)
result.append(current_replace)
current_replace.items_actual.extend(phrase)
current_rearrange = None
elif isinstance(phrase, Rearr):
# Rearrange
if not current_rearrange:
current_rearrange = Rearrange()
current_rearrange.items_actual.extend(phrase)
# TODO: Which target items?
current_rearrange.items_target.extend([x.match for x in phrase])
#current_rearrange.run = item.run
result.append(current_rearrange)
else:
if last_rearrange:
xxx = last_rearrange[-1].match
while True:
if xxx and util.ignore_item(xxx.next, junk):
xxx = xxx.next
else:
break
if xxx and xxx == phrase[0].match.prev:
# Append
current_rearrange.items_actual.extend(phrase)
# TODO: Which target items?
current_rearrange.items_target.extend([x.match for x in phrase])
else:
current_rearrange = Rearrange()
current_rearrange.items_actual.extend(phrase)
# TODO: Which target items?
current_rearrange.items_target.extend([x.match for x in phrase])
#current_rearrange.run = item.run
result.append(current_rearrange)
last_rearrange = phrase
# Don't forget remaining target items.
x = [y for y in replace.items_target if not y.match]
if x:
if not current_replace:
current_replace = diff.Replace([], [], 0, 0)
result.append(current_replace)
current_replace.items_target.extend(replace.items_target)
return result
def resolve_replace(prev_item, replace, next_item, junk=[]):
""" Resolves the given replace to a sequence of diff.Replace and
rearrange.Rearrange objects. """
# __________________________________________________________________________
# Identify the items that couldn't be rearranged and all items that could
# be rearranged in any run. The result is a list of all "unrearranged"
# items and a list of list of all rearranged items.
#
# simplified example:
# Let items_actual = "foo bar baz boo far faz" and lets say "bar baz" and
# "boo far" could be rearranged to (different) positions. We compute:
#
# unrearranged_items = ["foo", "faz"] and
# rearranged_items_lists = [["bar", "baz"], ["boo", "far"]]
i = 0
unrearranged_items = []
rearranged_items_lists = []
while i < len(replace.items_actual):
item = replace.items_actual[i]
if item.run:
# The item has a run and thus could be rearranged. Proceed as long
# next items belongs to the same run.
rearranged_items = [item]
while i + 1 < len(replace.items_actual):
next_item = replace.items_actual[i + 1]
# Abort if next item has no run or belongs to another run.
if not next_item.run or next_item.run != item.run:
break
rearranged_items.append(next_item)
i += 1
# Append the rearranged items to result if it is non-empty.
if rearranged_items:
rearranged_items_lists.append(rearranged_items)
else:
# The item has no run and thus couldn't be rearranged. Add it to
# unrearranged items.
unrearranged_items.append(item)
i += 1
# __________________________________________________________________________
# Split the (unmatched) target items into sequences of junk and non-junk
# items.
#
# simplified example:
# Let items_target = "foo bar JUNK1 baz JUNK2" with junk words "JUNK1" and
# "JUNK2". We compute:
#
# junk_target_items = ["JUNK1", "JUNK2"] and
# non_junk_target_items = ["foo", "bar", "baz"]
# Obtain all unmatched target items.
unmatched_target_items = [x for x in replace.items_target if not x.match]
junk_target_items = []
non_junk_target_items = []
for i in range(0, len(unmatched_target_items)):
item = unmatched_target_items[i]
if util.ignore_item(item, junk):
# The item is a junk item.
junk_target_items.append(item)
else:
# The item is not a junk item.
non_junk_target_items.append(item)
# __________________________________________________________________________
# Setup the sequence of diff.Replace and rearrange.Rearrange objects.
result = []
if not junk_target_items:
# There are no junk items. So create a single replace object with the
# unrearranged_items as actual items and the non_junk_target_items as
# the target items.
replace = diff.Replace([], [], 0, 0)
replace.items_actual.extend(unrearranged_items)
replace.items_target.extend(non_junk_target_items)
result.append(replace)
else:
# There is at least one junk item. We will assign each unrearranged
# actual item to a junk item. Because the junk items will be ignored
# from further process, we can ignore all unrearranged items.
for i in range(0, len(junk_target_items)):
replace = diff.Replace([], [], 0, 0)
replace.items_target.append(junk_target_items[i])
result.append(replace)
# Create a single replace object that considers the remaining non junk
# target items.
if non_junk_target_items:
replace = diff.Replace([], [], 0, 0)
replace.items_target.extend(non_junk_target_items)
result.append(replace)
# Iterate through the rearranged lists and setup the rearrange.Rearrange
# objects.
for i in range(0, len(rearranged_items_lists)):
rearrange_items = rearranged_items_lists[i]
rearrange = Rearrange()
rearrange.items_actual.extend(rearrange_items)
# Setup the target items (that are the matched items).
rearrange.items_target.extend([x.match for x in rearrange_items])
result.append(rearrange)
return result
