def _get_line_diff(self, line_number, before, after):
"""
Use precise diffing for tracking changes in single line.
"""
if before == "":
for change in self._get_diff(line_number, line_number + 1, [after]):
yield change
else:
for change in diff(before, after):
yield (change[0], line_number, change[2], change[3])
def _cursor_moved(self):
"""Called whenever the cursor moved."""
self._should_update_textobjects = False
self._vstate.remember_position()
if vim_helper.eval("mode()") not in "in":
return
if self._ignore_movements:
self._ignore_movements = False
return
if self._active_snippets:
cstart = self._active_snippets[0].start.line
cend = (
self._active_snippets[0].end.line + self._vstate.diff_in_buffer_length
)
ct = vim_helper.buf[cstart : cend + 1]
lt = self._vstate.remembered_buffer
pos = vim_helper.buf.cursor
lt_span = [0, len(lt)]
ct_span = [0, len(ct)]
initial_line = cstart
# Cut down on lines searched for changes. Start from behind and
# remove all equal lines. Then do the same from the front.
if lt and ct:
while (
lt[lt_span[1] - 1] == ct[ct_span[1] - 1]
and self._vstate.ppos.line < initial_line + lt_span[1] - 1
and pos.line < initial_line + ct_span[1] - 1
and (lt_span[0] < lt_span[1])
and (ct_span[0] < ct_span[1])
):
ct_span[1] -= 1
lt_span[1] -= 1
while (
lt_span[0] < lt_span[1]
and ct_span[0] < ct_span[1]
and lt[lt_span[0]] == ct[ct_span[0]]
and self._vstate.ppos.line >= initial_line
and pos.line >= initial_line
):
ct_span[0] += 1
lt_span[0] += 1
initial_line += 1
ct_span[0] = max(0, ct_span[0] - 1)
lt_span[0] = max(0, lt_span[0] - 1)
initial_line = max(cstart, initial_line - 1)
lt = lt[lt_span[0] : lt_span[1]]
ct = ct[ct_span[0] : ct_span[1]]
try:
rv, es = guess_edit(initial_line, lt, ct, self._vstate)
if not rv:
lt = "\n".join(lt)
ct = "\n".join(ct)
es = diff(lt, ct, initial_line)
self._active_snippets[0].replay_user_edits(es, self._ctab)
except IndexError:
# Rather do nothing than throwing an error. It will be correct
# most of the time
pass
self._check_if_still_inside_snippet()
if self._active_snippets:
self._active_snippets[0].update_textobjects(vim_helper.buf)
self._vstate.remember_buffer(self._active_snippets[0])
