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Source code for kivy.uix.behaviors.codenavigation

'''
Code Navigation Behavior
========================

The :class:`~kivy.uix.bahviors.CodeNavigationBehavior` modifies navigation
behavior in the :class:`~kivy.uix.textinput.TextInput`, making it work like an
IDE instead of a word processor.

Using this mixin gives the TextInput the ability to recognize whitespace,
punctuation and case variations (e.g. CamelCase) when moving over text. It
is currently used by the :class:`~kivy.uix.codeinput.CodeInput` widget.
'''

__all__ = ('CodeNavigationBehavior', )

from kivy.event import EventDispatcher
import string


[docs]class CodeNavigationBehavior(EventDispatcher): '''Code navigation behavior. Modifies the navigation behavior in TextInput to work like an IDE instead of a word processor. Please see the :mod:`code navigation behaviors module <kivy.uix.behaviors.codenavigation>` documentation for more information. .. versionadded:: 1.9.1 ''' def _move_cursor_word_left(self, index=None): pos = index or self.cursor_index() pos -= 1 if pos == 0: return 0, 0 col, row = self.get_cursor_from_index(pos) lines = self._lines ucase = string.ascii_uppercase lcase = string.ascii_lowercase ws = string.whitespace punct = string.punctuation mode = 'normal' rline = lines[row] c = rline[col] if len(rline) > col else '\n' if c in ws: mode = 'ws' elif c == '_': mode = 'us' elif c in punct: mode = 'punct' elif c not in ucase: mode = 'camel' while True: if col == -1: if row == 0: return 0, 0 row -= 1 rline = lines[row] col = len(rline) lc = c c = rline[col] if len(rline) > col else '\n' if c == '\n': if lc not in ws: col += 1 break if mode in ('normal', 'camel') and c in ws: col += 1 break if mode in ('normal', 'camel') and c in punct: col += 1 break if mode == 'camel' and c in ucase: break if mode == 'punct' and (c == '_' or c not in punct): col += 1 break if mode == 'us' and c != '_' and (c in punct or c in ws): col += 1 break if mode == 'us' and c != '_': mode = ('normal' if c in ucase else 'ws' if c in ws else 'camel') elif mode == 'ws' and c not in ws: mode = ('normal' if c in ucase else 'us' if c == '_' else 'punct' if c in punct else 'camel') col -= 1 if col > len(rline): if row == len(lines) - 1: return row, len(lines[row]) row += 1 col = 0 return col, row def _move_cursor_word_right(self, index=None): pos = index or self.cursor_index() col, row = self.get_cursor_from_index(pos) lines = self._lines mrow = len(lines) - 1 if row == mrow and col == len(lines[row]): return col, row ucase = string.ascii_uppercase lcase = string.ascii_lowercase ws = string.whitespace punct = string.punctuation mode = 'normal' rline = lines[row] c = rline[col] if len(rline) > col else '\n' if c in ws: mode = 'ws' elif c == '_': mode = 'us' elif c in punct: mode = 'punct' elif c in lcase: mode = 'camel' while True: if mode in ('normal', 'camel', 'punct') and c in ws: mode = 'ws' elif mode in ('normal', 'camel') and c == '_': mode = 'us' elif mode == 'normal' and c not in ucase: mode = 'camel' if mode == 'us': if c in ws: mode = 'ws' elif c != '_': break if mode == 'ws' and c not in ws: break if mode == 'camel' and c in ucase: break if mode == 'punct' and (c == '_' or c not in punct): break if mode != 'punct' and c != '_' and c in punct: break col += 1 if col > len(rline): if row == mrow: return len(rline), mrow row += 1 rline = lines[row] col = 0 c = rline[col] if len(rline) > col else '\n' if c == '\n': break return col, row