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# -*- coding: utf-8 -*-
#
# Copyright (C) 2009-2010 Per Arneng <per.arneng@anyplanet.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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import gio
import gedit
class FileLookup:
"""
This class is responsible for looking up files given a part or the whole
path of a real file. The lookup is delegated to providers wich use different
methods of trying to find the real file.
"""
def __init__(self):
self.providers = []
self.providers.append(AbsoluteFileLookupProvider())
self.providers.append(CwdFileLookupProvider())
self.providers.append(OpenDocumentRelPathFileLookupProvider())
self.providers.append(OpenDocumentFileLookupProvider())
def lookup(self, path):
"""
Tries to find a file specified by the path parameter. It delegates to
different lookup providers and the first match is returned. If no file
was found then None is returned.
path -- the path to find
"""
found_file = None
for provider in self.providers:
found_file = provider.lookup(path)
if found_file is not None:
break
return found_file
class FileLookupProvider:
"""
The base class of all file lookup providers.
"""
def lookup(self, path):
"""
This method must be implemented by subclasses. Implementors will be
given a path and will try to find a matching file. If no file is found
then None is returned.
"""
raise NotImplementedError("need to implement a lookup method")
class AbsoluteFileLookupProvider(FileLookupProvider):
"""
This file tries to see if the path given is an absolute path and that the
path references a file.
"""
def lookup(self, path):
if os.path.isabs(path) and os.path.isfile(path):
return gio.File(path)
else:
return None
class CwdFileLookupProvider(FileLookupProvider):
"""
This lookup provider tries to find a file specified by the path relative to
the current working directory.
"""
def lookup(self, path):
try:
cwd = os.getcwd()
except OSError:
cwd = os.getenv('HOME')
real_path = os.path.join(cwd, path)
if os.path.isfile(real_path):
return gio.File(real_path)
else:
return None
class OpenDocumentRelPathFileLookupProvider(FileLookupProvider):
"""
Tries to see if the path is relative to any directories where the
currently open documents reside in. Example: If you have a document opened
'/tmp/Makefile' and a lookup is made for 'src/test2.c' then this class
will try to find '/tmp/src/test2.c'.
"""
def lookup(self, path):
if path.startswith('/'):
return None
for doc in gedit.app_get_default().get_documents():
if doc.is_local():
location = doc.get_location()
if location:
rel_path = location.get_parent().get_path()
joined_path = os.path.join(rel_path, path)
if os.path.isfile(joined_path):
return gio.File(joined_path)
return None
class OpenDocumentFileLookupProvider(FileLookupProvider):
"""
Makes a guess that the if the path that was looked for matches the end
of the path of a currently open document then that document is the one
that is looked for. Example: If a document is opened called '/tmp/t.c'
and a lookup is made for 't.c' or 'tmp/t.c' then both will match since
the open document ends with the path that is searched for.
"""
def lookup(self, path):
if path.startswith('/'):
return None
for doc in gedit.app_get_default().get_documents():
if doc.is_local():
location = doc.get_location()
if location and location.get_uri().endswith(path):
return location
return None
# ex:ts=4:et:
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