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1 files changed, 145 insertions, 0 deletions

diff --git a/plugins/externaltools/tools/filelookup.py b/plugins/externaltools/tools/filelookup.py
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+++ b/plugins/externaltools/tools/filelookup.py
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+# -*- coding: utf-8 -*-
+#
+#    Copyright (C) 2009-2010  Per Arneng <[email protected]>
+#
+#    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: