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# -*- coding: utf-8 -*-
""" Contains the automatic generic indenter """
from pyqode.core.api import TextHelper
from pyqode.core.api.mode import Mode
from pyqode.qt.QtCore import Qt
class AutoIndentMode(Mode):
""" Indents text automatically.
Generic indenter mode that indents the text when the user press RETURN.
You can customize this mode by overriding
:meth:`pyqode.core.modes.AutoIndentMode._get_indent`
"""
def __init__(self):
super(AutoIndentMode, self).__init__()
def _get_indent(self, cursor):
"""
Return the indentation text (a series of spaces or tabs)
:param cursor: QTextCursor
:returns: Tuple (text before new line, text after new line)
"""
indent = TextHelper(self.editor).line_indent() * ' '
return "", indent
def on_state_changed(self, state):
if state is True:
self.editor.key_pressed.connect(self._on_key_pressed)
else:
self.editor.key_pressed.disconnect(self._on_key_pressed)
def _on_key_pressed(self, event):
"""
Auto indent if the released key is the return key.
:param event: the key event
"""
if not event.isAccepted():
if event.key() == Qt.Key_Return or event.key() == Qt.Key_Enter:
cursor = self.editor.textCursor()
pre, post = self._get_indent(cursor)
cursor.beginEditBlock()
cursor.insertText("%s\n%s" % (pre, post))
# eats possible whitespaces
cursor.movePosition(cursor.WordRight, cursor.KeepAnchor)
txt = cursor.selectedText()
if txt.startswith(' '):
new_txt = txt.replace(" ", '')
if len(txt) > len(new_txt):
cursor.insertText(new_txt)
cursor.endEditBlock()
event.accept()
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