imported ext.direction from newkey branch

1 files changed, 121 insertions, 0 deletions

diff --git a/ranger/ext/direction.py b/ranger/ext/direction.py
new file mode 100644
index 00000000..30eb87ce
--- /dev/null
+++ b/ranger/ext/direction.py
@@ -0,0 +1,121 @@
+# Copyright (C) 2009, 2010  Roman Zimbelmann <romanz@lavabit.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+class NoDefault(object):
+	pass
+
+class Direction(object):
+	"""An object with a down and right method"""
+	def __init__(self, right=None, down=None, absolute=False,
+			percent=False, pages=False, **keywords):
+		self.has_explicit_direction = False
+
+		if 'up' in keywords:
+			self.down = -keywords['up']
+		else:
+			self.down = down
+
+		if 'left' in keywords:
+			self.right = -keywords['left']
+		else:
+			self.right = right
+
+		if 'relative' in keywords:
+			self.absolute = not relative
+		else:
+			self.absolute = absolute
+
+		if 'default' in keywords:
+			self.default = keywords['default']
+		else:
+			self.default = NoDefault
+
+		self.original_down = self.down
+		self.original_right = self.right
+
+		self.percent = percent
+		self.pages = pages
+	
+	@property
+	def up(self):
+		if self.down is None:
+			return None
+		return -self.down
+
+	@property
+	def left(self):
+		if self.right is None:
+			return None
+		return -self.right
+
+	@property
+	def relative(self):
+		return not self.absolute
+
+	def down_or_default(self, default):
+		if self.has_been_modified:
+			return self.down
+		return default
+
+	def steps_down(self, page_length=10):
+		if self.pages:
+			return self.down * page_length
+		else:
+			return self.down
+
+	def steps_right(self, page_length=10):
+		if self.pages:
+			return self.right * page_length
+		else:
+			return self.right
+
+	def copy(self):
+		new = type(self)()
+		new.__dict__.update(self.__dict__)
+		return new
+
+	def __mul__(self, other):
+		copy = self.copy()
+		if self.absolute:
+			if self.down is not None:
+				copy.down = other
+			if self.right is not None:
+				copy.right = other
+		else:
+			if self.down is not None:
+				copy.down *= other
+			if self.right is not None:
+				copy.right *= other
+		copy.original_down = self.original_down
+		copy.original_right = self.original_right
+		return copy
+	__rmul__ = __mul__
+
+	def __str__(self):
+		s = ['<Direction']
+		if self.down is not None:
+			s.append(" down=" + str(self.down))
+		if self.right is not None:
+			s.append(" right=" + str(self.right))
+		if self.absolute:
+			s.append(" absolute")
+		else:
+			s.append(" relative")
+		if self.pages:
+			s.append(" pages")
+		if self.percent:
+			s.append(" percent")
+		s.append('>')
+		return ''.join(s)