class VirtView():
'''class VirtView()
THIS SHOULD PROBABLY MOVE INSIDE SBSTRING OBJECT
AND BE RENAMED.
This object holds a list that contains abstracted
pointers that allow for a logical view of the foreign
text in an SBString object.
If edits are made to the foreign text, new text
entries will be appened to the end of the foreign list but the pointers
here will be ordered so that the intended logical view
of the foreign text is preserved.
Example: the foreign list contains the text "abcdefghij", then I
insert "zz" after "d", which is offset 4. The new text ("zz")
is appended to the end of the foreign list object
but the entry in this object becomes:
[[0, 4, 0], [0, 2, 1], [4, 9, 0]]
The entry for [0, 2, 1] means to grab bytes 0-1 (which
is python slice s[0:2]) from the string that is stored
at index 1 in the foreign list.
*range* format: [start, end, list_offset_for_text]
where start and end* are python *slice()* numbers that
point into the text that is referenced by the list offset.
'''
class StateEntry(object):
start_pt = None
end_pt = None
list_idx = None
length = None
def __init__(self, start_pt, end_pt, list_idx):
object.__init__(self)
self.start_pt = start_pt
self.end_pt = end_pt
self.list_idx = list_idx
self.length = self.end_pt - self.start_pt
def __repr__(self):
return('[' + str(self.start_pt) + ', ' + str(self.end_pt) \
+ ', '+ str(self.list_idx) + ', ' + str(self.length) + ']')
class StateDeRef(object):
'''class StateDeRef()
This class will hold some values that will help to
translate an entry in the state list to an entry
in the main list.
The state list holds range entries with [start, end]
indexes (in python slice() format) that refer to
entries in the main list object.
state_offset = the zero-based offset into the state
object.
state_adj = a virtual offset that would point to
a logical value in the range [start, end].
For example, if the state entry is [10, 20]
and state_adj = 3, then the reference is to
an entry in the main list at offset 13, which
is 10 + 3.
list_idx = an index into self.l that corresponds to
self.state[state_offset][0] + state_adj.
'''
state_offset = None
state_adj = None
str_ptr = None
list_idx = None
def __init__(self, s_offset, s_adj, str_ptr, l_idx):
'''StateDeRef.__init()
'''
object.__init__(self)
self.state_offset = s_offset
self.state_adj = s_adj
self.str_ptr = str_ptr
self.list_idx = l_idx
def __iter__ (self):
# Maybe add a flag that will lock the objects from
# being altered when iter is active?
self.iterindex = 4
return(self)
def __next__(self):
self.iterindex -= 1
if self.iterindex == 4:
return(self.state_offset)
elif self.iterindex == 3:
return(self.state_adj)
elif self.iterindex == 2:
return(self.str_ptr)
elif self.iterindex == 1:
return(self.list_idx)
else:
raise StopIteration
def __repr__(self):
return([repr(self.state_offset) + ', ' + repr(self.state_adj) \
+ repr(self.str_ptr) + repr(self.list_idx)])
def __init__(self, state_entry):
'''VirtView.__init__()
'''
self.state = SBList([state_entry])
# use self.get_state_id()
#self.state_id = 1 # NOT USED??
def __iter__ (self):
# Maybe add a flag that will lock the objects from
# being altered when iter is active?
self.iterindex = len(self.state)
return(self)
def __getitem__(self, i):
return(self.state[i])
def __len__(self):
'''VirtView.__len__()
Returns the number of saved states.
'''
return(len(self.state))
def __next__ (self):
'''VirtView.__next__
Returns a range object, which contains
a start offset, end offset, and an id for
a string stored elsewhere. The start/end
pair follows python slice() notation where
end is one greater than the value that will
be returned when used as list[start : end]
'''
# return an object of type xxx with each iteration.
if self.iterindex == 0:
raise StopIteration
self.iterindex -= 1
##(s_offset, s_adj, l_idx) = self._get_vl_idx(self.iterindex)
##return(self.state[l_idx])
return(self.state[len(self.state) - self.iterindex])
def __repr__(self):
return(repr(self.state))
def _get_vl_idx(self, str_offset, state_id=-1):
'''VirtView._get_vl_idx()
Return pointers into state and a dereferenced
pointer into the the foreign list for the given
character offset.
If the character offset is beyond the
virtual length of the underlying object, this
returns [None, None, None, None], which might mean
to append a proposed insert at the end of the list.
'''
if state_id == -1: state_id = self.get_state_id()
#assert(state_id < (len(self.state) ))
str_len = self.get_llen(state_id=state_id)
if str_offset >= str_len: #l_list_len:
return([None, None, None, None])
# temp_str_offset will be the starting offset into the string
# in the range of pointers at this state offset. If temp_str_offset
# is less than the desired offset, read the next range of
# pointers from this state and see if the span of that range
# adds enough to temp_str_offset to contain the desired offset.
temp_str_offset = 0
l_adjust = None
#print('SBSTring. char offset=' + str(str_offset) +' state: ' + repr(self.state))
for s_offset in range(len(self.state)):
# For each s_offset in the current state (s_offset
# is an index into character offset
# ranges entered into the current state).
#
# 'highest_str_offset' is the highest character offset that would
# be captured by the tuple in self.state[state_id][s_offset].
highest_str_offset = temp_str_offset + self.state[s_offset].end_pt \
- self.state[s_offset].start_pt - 1
if highest_str_offset < str_offset:
# We have not scanned forward far enough to reach the
# desired virtual row, advance the search row index:
temp_str_offset = highest_str_offset + 1
else:
# The desired string offset is in this range
#
# Within the specified range, I want to find the entry
# in l that is 'offset' from the first entry in
# the current range, so the real data will be in
# l[state[state_id][0] + l_adjust]
l_adjust = str_offset - temp_str_offset
temp_str_offset += l_adjust
break
# Return
# 1) s_offset = (state offset) an offset into the current state that contains
# a range that spans the specified virtual row.
# 2) l_adjust = an offset that should be added to the contents of
# state[s_offset][0] to point into l to
# find the specifed virtual row; e.g.:
# l[self.state[s_offset][0] + l_adjust]
# 3) l_offset = the desired string? offset into the text object?
#
# I think str_pt is now used to point to the character offset within
# a chunk of text, and string_id is the index of the list entry in
# the foreign list.
str_pt = self.state[s_offset].start_pt + l_adjust
string_id = self.state[s_offset].list_idx
# IS STRING_ID THE SAME AS str_pt?
# THIS ASSERTION FAILED: assert(string_id == str_pt)
sd = self.StateDeRef(s_offset, l_adjust, str_pt, string_id)
return(sd)
def delete_state(self, s_offset, batch=False, state_id=-1):
'''VirtView.delete_state()
Delete a *range* item from the state.
'''
if state_id == -1: state_id = self.get_state_id()
#del self.state[s_offset]
self.state.delete(s_offset, state_id=state_id, batch=batch)
return(0)
def get_item(self, idx, state_id=-1):
if state_id == -1:
state_id = self.get_state_id()
return(self.state.get_item(idx, state_id))
def get_list(self):
return(self.state.return_list())
def get_llen(self, state_id=-1):
'''VirtView.get_llen()
Return the length of the virtual string in the
specified state.
'''
if state_id == -1: state_id = self.get_state_id()
llen = 0
#for s in self.state: ################################ THIS DIDN'T WORK
startt = datetime.datetime.now()
#for j in range(len(self.state)):
# s = self.state[j]
# The 'for s in self.state' version was 25% faster than for j in range(len(self.state
# but is still slow. I then stored the list len in SBList and reduce run time by
# half.
for s in self.state:
# Remember that the last index is in python format is
# is one greater than the real index of what will
# be includuded in this state element.
#print('adding virtual len of state ' + repr(s) + ' totlen = ' + str(len(self.state)))
#llen += s[1] - s[0]
# The change from calculating length to storing made no difference
llen += s.length
endt = datetime.datetime.now()
#dprint('llen took ' + str((endt - startt).microseconds) )#+ ' for loop count: ' + str(j))
return(llen)
def get_range(self, s_offset=-1, v_row=-1, state_id=-1):
'''VirtView.get_range()
Given either a state_offset or a virtual row index,
return the *range* entry, which contains
start, end, string_id (where start and end are in
python slice() format).
You must pass a keyword argument for either s_offset
or v_row.
'''
if state_id == -1: state_id = self.get_state_id()
if s_offset == -1:
if v_row == -1:
raise Exception('You must pass either a state offset or a v_row " \
+ "as a keyword parameter to get_range')
else:
#(s_offset, s_adj, l_idx, str_idx) = self._get_vl_idx(v_row)
sd = self._get_vl_idx(v_row)
return(self.state[sd.state_offset])
else:
return(self.state[s_offset])
def get_state_id(self):
'''VirtView.et_state_id()
This gets the state ID from the underlying SBLIst object
that holds the state information.
see also self.state.incr_state_id()
'''
return(self.state.get_state_id())
def insert(self, v_row, state_entry, state_id=-1, batch=False,):
'''VirtView.insert()
l_range is now a state_entry object
*range* points to a slice of a foreign list, but
the contents of that slice will be displayed
starting at the specified virtual row.
I think *range* contains [start, end] but I'm not sure.
Insert the range into the state list, and ideally
I should merge state entries if the starting or ending
values inside *range* are contiguous to those entries
near it in the *state* list.
'''
times = []
#dprint('-----------------insert start')
if state_id == -1:
state_id = self.get_state_id()
v_idx = 0
s_offset = 0
# * a *range* is a 3-item list like [5, 8, 2], the fist two
# numbers of which are
# a 'slice()' referece to a range of entries in
# a foreign list object that can be identifed with the third nbr.
# * s_offset points to an existing *range* entry in self.state
# * sd.state_adj is an offset between l_range[0] and l_range[1]
# * list_idx is an offset into the foreign table where the associated
# virtual item (v_row) is stored. Its value is between
# l_range[0] and l_range[1]
#
# Length of the string before insertion.
times.append(['a', datetime.datetime.now()])
virtual_len = self.get_llen(state_id=state_id)
times.append(['b', datetime.datetime.now()])
if virtual_len == 0:
# The state list can be empty if the user deleted everything,
# but point to row zero to facilitate insert()
v_row = 0
#print('vv, vrow = ' + str(v_row) + ' len ' + str(virtual_len) + ' state: ' + repr(self.state))
if v_row >= virtual_len:
# Append the new row at the end of self.state, regardless of how far
# v_row exceeds the length of self.state
self.state.append(state_entry, state_id=state_id, batch=batch)
return(0)
# For the given virtual row, find the index into self.state. I think
# l_row is a character offset
#(s_offset, s_adj, l_row, string_id) = self._get_vl_idx(v_row)
sd = self._get_vl_idx(v_row)
assert(sd.list_idx is not None)
if sd.state_adj == 0:
# The new *range* item belongs at the start of an existing range
# so insert the new item here:
times.append(['c', datetime.datetime.now()])
self.state.insert(sd.state_offset, state_entry, state_id=state_id, batch=batch)
times.append(['c2', datetime.datetime.now()])
else:
if self.state[sd.state_offset].end_pt == v_row:
# The new item goes after this state entry
times.append(['d', datetime.datetime.now()])
self.state.insert(sd.state_offset + 1, state_entry, state_id=state_id, batch=batch)
times.append(['d2', datetime.datetime.now()])
else:
# split the old range entry
low = self.state[sd.state_offset].start_pt
high = self.state[sd.state_offset].end_pt
# I think str_id is an offset into the sblist for an immutable string.
str_id = self.state[sd.state_offset].list_idx
self.state.delete(sd.state_offset, state_id=state_id, batch=batch)
# The deletion above should have creatd a new state for the self.state object.
# I should now use that for the remainin transactions in this batch:
state_id = self.state.get_state_id()
# Insert the lower part of the state entry:
times.append(['e', datetime.datetime.now()])
self.state.insert(sd.state_offset, self.StateEntry(low, low + sd.state_adj, sd.list_idx),
batch=True, state_id=state_id)# batch is always true here
# Insert the entry for the newly inserted text:
self.state.insert(sd.state_offset + 1, state_entry, batch=True, state_id=state_id)
# Insert the top half of the old range that was split
self.state.insert(sd.state_offset+ 2, self.StateEntry(low + sd.state_adj, high, sd.list_idx),
batch=True, state_id=state_id)
times.append(['e2', datetime.datetime.now()])
#for j in range(1, len(times)):
# #dprint(times[j][0] + ', ' + times[j - 1][0] + ' '
# # + repr((times[j][1] - times[j - 1][1]).microseconds))
return(0)
def insert_state(self, s_offset, state_entry, state_id=-1, batch=False):
'''VirtView.insert_state()
Insert a range object into self.state.
This is intended to facilitate rewriting
the state for deletions in the virual
representation of the underlyling list.
see also: delete_state()
'''
if state_id == -1: state_id = self.get_state_id()
self.state.insert(s_offset, state_entry, state_id=state_id, batch=batch)
return(0)
def set_state_id(self, id):
self.state.set_state_id(id)
return(0)
def show_state(self, state_id):
'''VirtView.show_state()
return some debugging info
'''
#return(self.state.show_state(state_id=state_id))
return(repr(self.state))
class SBStrList(object):
'''class SBStrList()
This is a list of strings that is built
on state-based objects that facilitate
undo().
'''
class StorageRef(object):
storage_start = None
storage_end = None
logical_start = None
logical_end = None
def __init__(self):#, storage_range, logical_range):
object.__init__(self)
class LogEntry():
'''class SBStrList.LogEntry
This holds information about one edit action.
The properties are populated according to what makes
sense for the given action.
t_pt is a pointer into the text of the current line,
not a global text pointer.
sbstr will be an SBString object for line-deletion transaction
or line cut/paste.
Action codes:
'i' for insert text,
'd' for delete text,
'il' = insertline,
'dl' = delete line.
Possible future codes would be 'm' for move-a-line, or 'u' for
updated. Update is currently processed by a deletion and
an insert.
'''
action = None
time = None
old_lstate = None
new_lstate = None
old_str_state = None
new_str_state = None
row_idx = None
t_pt = None
txt = None
sbstr = None
def __init__(self, action, time, old_lstate, new_lstate, old_str_state, \
new_str_state, row_idx, del_count=None, t_pt=None, txt=None, sbstr=None):
'''UndoChanges.__init__
'''
self.action = action
self.time = time
self.old_lstate = old_lstate
self.new_lstate = new_lstate
self.old_str_state = old_str_state
self.new_str_state = new_str_state
self.row_idx = row_idx
# for text edits only (not line insertion or deletion:
self.t_pt = t_pt
self.txt = txt
# for line deletion, cut and paste
self.sbstr # a SBString object
def __repr__(self):
'''log.__repr__
'''
return('[' + self.action + ', ' + self.time.strftime("%Y %h %d %H:%M:%S.") \
+ str(self.time.time().microsecond) + ', ' \
+ str(self.old_lstate) + ', ' + str(self.new_lstate) + ', ' \
+ str(self.old_str_state) + ', ' + str(self.new_str_state) + ', ' \
+ str(self.row_idx) + ', ' + repr(self.t_pt) + ', '
+ repr(self.txt) + ']\n')
def __init__(self, ListOfStrings):
'''SBStrList.__init__()
'''
# MAYBE I SHOULD CODE ATTRIBUTES WITH THE VALUE OF THE
# CURRENT INSTANCE SO EVERYTHING CAN GRAB THE CURRENT
# STATE_ID WITHOUT REQUIRING INPUT FROM THE USER -- is that needed?
object.__init__(self)
# Cast the strings as SBSTring objects and load into a new list.
# I tried embedding this into SBList, but it caused a loop in the
# definitions of SBList and SBString.
self.buff_len = SBList([0])
temp_l = []
for j in range(len(ListOfStrings)):
#if ListOfStrings[j][-1] not in ['\n', '\r'] \
#and j != (len(ListOfStrings) - 1):
# temp_l.append(SBString(ListOfStrings[j]) + '\n')
#else:
if ListOfStrings[j][0:-1].count('\n') > 0:
raise Exception('Your test string contains an embedded EOL in mid-line.')
temp_l.append(SBString(ListOfStrings[j]))
self.buff_len[0] += len(ListOfStrings[j])
self.l = SBList(temp_l)
#
self.state_id = 0
self.point = SBList([0])
# The main state_id for SBStrList will be the state_id for
# self.log? To show the undo list of self.log, display
# only values in the range self.log[0:self.log.get_state_id].
# I might have to review how transactions
# are chunked (such as 'replace' or 'update' transactions).
self.log = SBList([])
# Maybe use a list or function that lists all the
# objects that contain range-based lists so that users
# can create one and have it automatically updated.
self.range_lists = []
self.range_funcs = []
self.bookmarks = SBList([])
# The *statements* field might be used to store the start and
# end points of comment blocks or full statements in a
# programming language. It might help the logic for applying
# the syntax highligher by telling it to start on a prior line.
self.statements = SBList([])
self.range_lists.append(self.bookmarks)
self.range_lists.append(self.statements)
self.line_pts = None
self.rebuild_line_pts()
tmp_lp = None
self.range_lists.append(self.line_pts)
def __getitem__(self, x):
# This returns an item from the main list based
# on the virtual row index, *x*. That index
# can be a slice(), which is a range() specifed
# in python format (i.e., the last index is one
# greater than what you want returned).
if x > len(self):
raise IndexError
if type(x) == type(slice(1,2)):
temp = []
if x.step is None:
step = 1
else:
step = x.step
for j in range(x.start, x.stop, step):
temp.append(self.l[self.get_lrow_idx(j)])
return(temp)
else:
# The requested item is not a slice:
return(self.l[x])
#return(self.l[self.get_lrow_idx(x)])
def __iter__ (self):
# Maybe add a flag that will lock the objects from
# being altered when iter is active?
self.iterindex = len(self.l)
return(self)
def __len__(self):
'''SBStrList.__len__()
Returns the length of the virtual list object.
'''
return(len(self.l))
def __next__ (self):
'''SBStrList.__next__()
Return a list entry with each call.
'''
self.iterindex -= 1
if self.iterindex < 0:
raise StopIteration
#
# the countdown starts at the maximum value, but I want
# to reverse the index to start at zero:
new_idx = len(self.l) - self.iterindex - 1
return(self.l[new_idx])
def __repr__(self):
#s = ''
tmp_l = []
for j in range(self.line_count()):
#s += self.l[j].get_string()
tmp_l.append(self.l[j].get_string())
return(''.join(tmp_l))
def __len__(self):
return(len(self.l))
def _dump(self, msg):
'''SBStrList._dump()
Dump many important objects to sys.stderr
Run this program from the command line like this:
env python sbed02.py -f infile.txt 2> debug.log
where 2> is the redirection for stderr.
'''
dprint('---------------------------------------DUMP START')
dprint(msg)
dprint('')
dprint('state_id= ' + str(self.state_id))
dprint('point state id=' + str(self.point.get_state_id()) +' contents = ' + repr(self.point))
dprint('log state id =' + str(self.log.get_state_id()) + ' contents=\n' + repr(self.log))
dprint('line_pts state id= ' + str(self.line_pts.get_state_id()) + ', contents:\n' + repr(self.line_pts))
dprint('self.l:\n' + repr(self.l))
return(0)
def add_bookmark(self, range):
pass
def add_statement(self, range):
pass
def add_range_list(self, lst):
'''SBStrList.add_range_list(
Add a list object that contains [start, end]
pointers into the text using python slice()
format.
Lists entered here need corresponding entries
loaded via add_range_updater() that are run
via update_range_lists()
'''
self.rangelist.append(lst)
return(0)
def delete(self, pt, count, batch=False):
# 1) Find the affected line
# 2) determine if the full line is being deleted
# 3) delete as needed
# 4) update line_pts
# 5) update bookmarks
# 6) update statements
idx = self.pt_to_line(pt)
# Get the pointer within the appropriate text chunk:
t_pt = self.pt_to_t_pt(pt)
#
save_lstate = self.l.get_state_id()
save_str_state = self.l[idx].get_state_id()
save_t_pt = t_pt
dprint('del a ' + str(self.l[idx].get_point()))
self.l[idx].delete(t_pt, count, batch=batch)
dprint('del b ' + str(self.l[idx].get_point()))
self.update_line_pts(pt, -1 * count, batch=batch)
self.log.append(self.LogEntry('d', datetime.datetime.now(), save_lstate, \
self.l.get_state_id(), save_str_state, \
self.l[idx].get_state_id(), idx, t_pt=t_pt, del_count=count))
return(0)
def get_char(self, pt):
idx = self.pt_to_line(pt)
t_pt = self.pt_to_t_pt(pt)
return(self.l[idx].get_char(t_pt))
def get_lines(self, idx, count=1):
pass
def get_line_pts(self, idx):
'''SBStrList.get_line_pts()
return a range that contains the starting and ending
points for the specified line in [star, end] slice()
format.
'''
if idx > len(self.line_pts) or idx < 0:
raise IndexError
return(self.line_pts[idx])
def get_point(self, state_id=-1):
pass
def get_str_list(self):
'''StrList.get_str_list()
Return a list object that contains the regular text
stored in this object.
'''
tmp_l = []
for j in range(len(self.l)):
l.append(self.l[j].get_string())
return(''.join(tmp_l))
def goto_bookmark(self, bmark):
# maybe use a dictionary to handle bookmarks,
# so this arg would be the string name of the
# bookmark.
pass
def insert(self, pt, txt, batch=False):
# make all these methods so that they operate on
# the current state (no state_id override)
# Note: pt is the global point. t_point is the point
# into the current text object.
#
# Function:
# 1) Find the affected line
# 2) determine if new lines are being created (embedded EOL)
# 3) insert as needed
# 4) update the log
# 5) update line_pts
# 6) update bookmarks
# 7) update statements
# TODO: consider keeping the EOL marker as the indicator of
# where existing SBString object will be copied. In other
# words, If I insert a block of text with embedded EOL,
# the first part of the insertion would generate a new SBString
# as if the existing EOL is fixed in concrete thereby forcing
# the inserted lines to be inserted above. This will help to
# keep undo history predictable. If an EOL marker is deleted,
# then that SBString object will be deleted from the virtual view.
idx = self.pt_to_line(pt)
# Get the pointer within the appropriate text chunk:
t_pt = self.pt_to_t_pt(pt)
#
save_lstate = self.l.get_state_id()
save_str_state = self.l[idx].get_state_id()
dprint('in SBStrList.insert a: str sid = ' + str(self.l[idx].get_state_id()) \
+ ' lstateid = ' + str(self.l.get_state_id()) + ' batch is ' + repr(batch))
save_t_pt = t_pt
# DO I NEED EXTRA LOGIC FOR NON-STANDARD EOL?
lines = txt.split(os.linesep)
end_txt = ''
for j in range(len(lines)):
if j == 0:
# Insert the first part of the new text:
self.l[idx].insert(t_pt, lines[j], batch=batch)
dprint('in SBStrList.insert B: str sid = ' + str(self.l[idx].get_state_id()) \
+ ' lstateid = ' + str(self.l.get_state_id()))
self.update_line_pts(pt, len(lines[j]))
pt += len(lines[j])
if len(lines) > 1:
# The insertion contains embedded EOL, so
# delete the end of the line that was displaced by
# inserting the EOL (but leave the existing EOL)
t_pt = self.pt_to_t_pt(pt)#pointer within this text chunck
end_txt = self.l[idx].get_string()[t_pt:]
#print("multi-line insert, pt=" + str(pt) + ' deleting from tpt=' \
# + str(t_pt) + ' endtxt= ' + end_txt)
self.l[idx].delete(t_pt, len(end_txt), batch=True)
self.update_line_pts(pt, -1 * len(end_txt))
# Insert an EOL after the first insertion
# (note that the last line in the file might not have had one)
self.l[idx].insert(t_pt, '\n', batch=True)
self.update_line_pts(pt, 1)
pt += 1
# Push the end of the insertion line to a new line.
self.l.insert(idx + 1, SBString(end_txt ), batch=True)
self.rebuild_line_pts()
#self.update_line_pts(pt, len(end_txt) + 1)
#pt += 1 #eol
else:
# Insert the second (or higher) line of new text.
if len(lines[j]) != 0:
if j == (len(lines) - 1):
# The last portion of the split text in 'lines'
# If it is empty, don't do anything, others insert
# the text into an existing SBText object
t_pt = self.pt_to_t_pt(pt)#pointer within this text chunck
self.l[idx + j].insert(t_pt, lines[j], batch=True)
dprint('in SBStrList.insert B: str sid = ' + str(self.l[idx].get_state_id()) \
+ ' lstateid = ' + str(self.l.get_state_id()))
self.update_line_pts(pt, len(lines[j]))
pt += len(lines[j])
else:
# This is a new, full line with EOL.
# Insert a new line into the file.
self.l.insert(idx + j, SBString(lines[j]), batch=True)
# RUN REBUILD_LINE_PTS HERE !!!!!!!!!!!!!!!!!!!!!!!!
self.update_line_pts(pt, len(lines[j]))
pt += len(lines[j])
# Now insert that end text at the end
#if end_txt != '':
# t_pt = self.pt_to_t_pt(pt)#pointer within this text chunck
# print('Appending end, pt=' + str(pt) + ', tpt= ' + str(t_pt))
# print('chcking line nb ' + str(self.pt_to_line(pt)))
# self.l[idx].insert(t_pt, end_txt, batch=False)
# self.update_line_pts(pt, len(end_txt))
# print('line pts= ' + repr(self.line_pts))
# Construct the log entry:
self.log.append(self.LogEntry('i', datetime.datetime.now(), save_lstate, \
self.l.get_state_id(), save_str_state, \
self.l[idx].get_state_id(), idx, t_pt=t_pt, txt=txt))
self.buff_len[0] += len(txt)
return(0)
def insert_line(self, before_line, txt):
pass
def line_count(self):
return(len(self.l))
def list_bookmarks(self):
pass
def list_statements(self):
pass
def pt_to_line(self, pt):
'''SBStrList.pt_to_line()
Return the index number of the line that contains the
specified point in the current state.
'''
#print(repr(self.line_pts))
found = False
j = 0
while not found and j < len(self.line_pts):
if self.line_pts[j][0] <= pt and (self.line_pts[j][1] - 1) >= pt:
found = True
j += 1
return(j - 1)
def pt_to_t_pt(self, pt):
'''SBStrList.pt_to_t_pt()
Convert a global point into the buffer to a t_pt,
which is a zero-based index into the text at the current line
'''
line = self.pt_to_line(pt)
assert( line >= 0)
return(pt - self.line_pts[line][0])
def rebuild_line_pts(self):
tmp_lp = []
tmp_pt = 0
for j in range(len(self.l)):
# Record the starting and ending point on each line.
# This is NOT in slice() format.
tmp_lp.append([tmp_pt, tmp_pt + len(self.l[j])])
tmp_pt += len(self.l[j])
self.line_pts = SBList(tmp_lp)
return(0)
def redo(self):
pass
def set_bookmark(self, pt_start, len):
pass
def show_line_pts(self):
'''SBStrList.show_line_pts()
This is for debugging purposes to show the saved
list of starting and ending points (slice() format)
for each buffer line.
'''
return(repr(self.line_pts))
def show_undo_list(self):
return(repr(self.log))
def set_point(self, pt):
pass
def str_len(self):
'''SbStrList.str_len()
Return the full length of the buffer in characters.
'''
#ln = 0
#for sbs in self.l:
# ln += len(sbs)
#return(ln)
reuturn(self.buff_len[0])
def list_len(self):
return(len(self.l))
def undo(self):
if len(self.log) == 0:
return(0)
top_state_id = self.log.get_state_id()
#top_log_entry = self.log[-1]
#self.log[0:self.log.get_state_id]
top_log_entry = self.log[top_state_id]
top_action_code = top_log_entry.action
top_idx = top_log_entry.row_idx
# The undo() below undoes the record of the transaction
# and thereby leaves the top entry with the l_state and
# v_state IDs that are desired.
# ONE UNDO ON THE LOG ENTRY WILL NOT UNDO MANY BATCH ENTRIES !!!!!!!!!!!!!!!!!!!!i!!!!!!!
self.log.undo() #this undoes only the transaction
if top_action_code in ['i', 'd']:
#print('UNDO TEXT EDIT for line idx ' + str(top_idx))
self.l[top_idx].undo(count=1)
self.buff_len.undo()
else:
raise Exception ("not ready to undo line-oriented actions")
pass
def update_line_pts(self, pt, incr, batch=False):
'''SBStrList.update_line_pts()
Update self.line_pts to reflect inserted or deleted
text. Do NOT call this if there are new or delete lines.
self.line_pts is a list of the starting points
and ending points for each line.
see also: rebuild_line_pts
'''
idx = self.pt_to_line(pt)
# I will delete all the existing range entries and then append
# new ones
old_lp_state = self.line_pts.get_state_id()
b_code = batch
len_pts = len(self.line_pts)
save_line_pts = []
for j in range(len_pts):
# Save the current state of line_pts because if actions
# are taken in batch mode, I'll need this to get the
# prior state.
save_line_pts.append(self.line_pts[j])
for j in range(len_pts -1, idx - 1 , -1):
self.line_pts.delete(j, batch=b_code)
b_code = True
# Now insert the updated entries (there might be new or delete rows)
for j in range(idx, len(save_line_pts)):
# The current state of self.line_pts should contain one entry
# for each record in self.l. Get that entry to find the starting and
# ending point for each line:
low = save_line_pts[j][0]
high = save_line_pts[j][1]
if low <= pt:
self.line_pts.append([low , high+ incr], batch=True)
else:
self.line_pts.append([low + incr, high+ incr], batch=True)
return(0)
def update_range_lists(self, pt, incr):
'''SBStrList.update_ranges()
Update all the list objects that contain ranges of
start/end points. This processes anything that was
registered with add_range_list()
see also: rebuild_line_pts
'''
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
# MODIFY THIS TO MAKE IT GENERIC FOR THE REGISTERED LISTSV
idx = self.pt_to_line(pt)
# I will delete all the existing range entries and then append
# new ones
old_lp_state = self.line_pts.get_state_id()
b_code = False
for j in range(idx, len(self.line_pts)):
self.line_pts.delete(idx, batch=b_code)
b_code = True
# Now insert the updated entries (there might be new or delete rows)
for j in range(idx, len(self.l)):
low = self.line_pts.get_item(j, state_id=old_lp_state)[0]
high = self.line_pts.get_item(j, state_id=old_lp_state)[1]
if low < pt:
self.line_pts.append([low , high+ incr], batch=True)
else:
self.line_pts.append([low + incr, high+ incr], batch=True)
return(0)