[Python] Set and retrieve property on charFormat

I have these two methods below:

def _apply_forced_newlines(self, cursor):
doc = self.text.document()
corrections = [] # Position -> action ('insert')

block = doc.firstBlock()
while block.isValid():
layout = block.layout()
if not layout:
block = block.next()
continue

for line_index in range(layout.lineCount()):
line = layout.lineAt(line_index)
if not line.isValid():
continue

# Calculate the absolute position at the end of the visual line
line_end_pos_abs = block.position() + line.textStart() + line.textLength()

if line_end_pos_abs < doc.characterCount() and line_end_pos_abs > 0:
char_at_end = doc.characterAt(line_end_pos_abs - 1)
char_after_end = doc.characterAt(line_end_pos_abs)

if not char_at_end.isspace() and not char_after_end.isspace():
cursor.setPosition(line_end_pos_abs)
cursor.movePosition(QTextCursor.StartOfWord)
word_start_position = cursor.position()

# Check that a newline isn't already there.
if doc.characterAt(word_start_position - 1) != QChar('\u2028'):
corrections.append((word_start_position, 'insert'))

block = block.next()

# Apply corrections
if corrections:

# Sort changes: only insertions, in descending position.
corrections.sort(key=lambda item: -item[0])

print('corrections=', corrections)
for position, action in corrections:
if action == 'insert':
forced_newline_format = QTextCharFormat()
forced_newline_format.setObjectType(WritingSettings.SVG_CHAR_OBJECT_TYPE)
forced_newline_format.setProperty(WritingSettings.FORCED_NEWLINE, 1)
cursor.setPosition(position)
cursor.insertText('\u2028', forced_newline_format)

# Log to verify the property is set correctly
char_format = cursor.charFormat()
logging.info(f"Inserted newline at {position} with property: {char_format.property(WritingSettings.FORCED_NEWLINE)}")




and:

def _clear_forced_newlines(self, text_edit):
doc = text_edit.document()

# Define the property key
forced_newline_property = WritingSettings.FORCED_NEWLINE

cursor = QTextCursor(doc)
cursor.beginEditBlock()

# Iterate through blocks from the end to the beginning.
block = doc.lastBlock()
while block.isValid():
# Create a cursor for the current block
block_cursor = QTextCursor(block)
block_cursor.movePosition(QTextCursor.EndOfBlock)

# Iterate through characters within the block from the end.
while block_cursor.positionInBlock() > 0:
# Select the character by moving back one position with KeepAnchor
block_cursor.movePosition(QTextCursor.PreviousCharacter, QTextCursor.KeepAnchor)

# Check if a character was selected
if block_cursor.hasSelection():
selected_text = block_cursor.selectedText()
char_format = block_cursor.charFormat()
has_property = char_format.property(forced_newline_property)

logging.info(f"remove Checking character at position {block_cursor.selectionStart()}: "
f"selected_text='{repr(selected_text)}', "
f"has_property={has_property}")

# Check if the selected character is a newline and has the custom property
if selected_text == '\u2028' and has_property == 1:
logging.info('Removing forced newline at position: {}'.format(block_cursor.selectionStart()))
# Remove the formatted newline and insert a space
block_cursor.removeSelectedText()
block_cursor.insertText(" ")

# Move the cursor back one position to clear the selection for the next iteration
block_cursor.movePosition(QTextCursor.PreviousCharacter)

block = block.previous()

cursor.endEditBlock()



My log gives in the _apply_forced_newlines gives me below line:

Inserted newline at 22 with property: 1



That is the property is set on the correct position where the newline char is inserted.

But the log in _clear_forced_newlines gives me:

remove Checking character at position 23: selected_text=''\ufffc'', has_property=1
remove Checking character at position 22: selected_text=''\u2028'', has_property=None



The property is shown on the wrong position although the inserted char is at the correct position.

How do I make sure to get the property set on the correct char at the correct position?

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