def unIndentBlock(block):
            currentIndent = blockIndentation(block)

            if currentIndent.endswith('\t'):
                charsToRemove = 1
            elif withSpace:
                charsToRemove = 1 if currentIndent else 0
            else:
                if self.useTabs:
                    charsToRemove = min(spacesCount(currentIndent), self.width)
                else:  # spaces
                    if currentIndent.endswith(self.text()):  # remove indent level
                        charsToRemove = self.width
                    else:  # remove all spaces
                        charsToRemove = min(spacesCount(currentIndent), self.width)

            if charsToRemove:
                cursor = cursorAtSpaceEnd(block)
                cursor.setPosition(cursor.position() - charsToRemove, QTextCursor.KeepAnchor)
                cursor.removeSelectedText()
def __init__(self):
        # Fix some key bindings
        self.bind("<Control-Key-a>", self.select_all)
        # We will need Ctrl-/ for the "stroke", but it cannot be unbound, so
        # let's prevent it from being passed to the standard handler
        self.bind("<Control-Key-/>", lambda event: "break")
        # Diacritical bindings
        for a, k in self.accents:
            # Little-known feature of Tk, it allows to bind an event to
            # multiple keystrokes
            self.bind("<Control-Key-%s><Key>" % k,
                      lambda event, a=a: self.insert_accented(event.char, a))