From f9851884bee1e5f4ff83a9748449feb1dbc58ba1 Mon Sep 17 00:00:00 2001
From: jgoerzen <jgoerzen>
Date: Fri, 12 Jul 2002 02:58:51 +0100
Subject: [PATCH] /head: changeset 108

More work on the UIs
---
 head/offlineimap.conf           | 13 +++++++++++
 head/offlineimap/ui/Tk.py       | 14 ++++++++++--
 head/offlineimap/ui/__init__.py | 30 +++++++++++++++++++++++++-
 head/offlineimap/ui/detector.py | 38 +++++++++++++++++++++++++++++++++
 4 files changed, 92 insertions(+), 3 deletions(-)
 create mode 100644 head/offlineimap/ui/detector.py

diff --git a/head/offlineimap.conf b/head/offlineimap.conf
index 7cd3219..d10ecb5 100644
--- a/head/offlineimap.conf
+++ b/head/offlineimap.conf
@@ -49,6 +49,19 @@ accounts = Test
 
 maxsyncaccounts = 1
 
+# You can specify one or more user interface modules for OfflineIMAP
+# to use.  OfflineIMAP will try the first in the list, and if it
+# fails, the second, and so forth.
+#
+# The pre-defined options are:
+# Tk.TKUI -- A graphical interface
+# TTY.TTYUI -- a text-based (terminal) interface
+#
+# You can override this with a command-line option -u.
+
+ui = Tk.TKUI, TTY.TTYUI
+
+
 ##################################################
 # Mailbox name recorder
 ##################################################
diff --git a/head/offlineimap/ui/Tk.py b/head/offlineimap/ui/Tk.py
index f8538ce..ac52e88 100644
--- a/head/offlineimap/ui/Tk.py
+++ b/head/offlineimap/ui/Tk.py
@@ -142,6 +142,15 @@ class ThreadFrame(Frame):
 class TkUI(UIBase):
     def __init__(self, verbose = 0):
         self.verbose = verbose
+
+    def isusable(s):
+        try:
+            Tk().destroy()
+            return 1
+        except TclError:
+            return 0
+
+    def _createTopWindow(self):
         self.top = Tk()
         self.top.title(version.productname + " " + version.versionstr)
         self.threadframes = {}
@@ -149,7 +158,7 @@ class TkUI(UIBase):
         self.tflock = Lock()
         self.notdeleted = 1
 
-        t = threadutil.ExitNotifyThread(target = self.runmainloop,
+        t = threadutil.ExitNotifyThread(target = self._runmainloop,
                                         name = "Tk Mainloop")
         t.setDaemon(1)
         t.start()
@@ -159,7 +168,7 @@ class TkUI(UIBase):
         t.setDaemon(1)
         t.start()
 
-    def runmainloop(s):
+    def _runmainloop(s):
         s.top.mainloop()
         s.notdeleted = 0
     
@@ -228,6 +237,7 @@ class TkUI(UIBase):
         TextOKDialog("Main Program Exception", msg)
 
     def init_banner(s):
+        s._createTopWindow()
         s._msg(version.productname + " " + version.versionstr + ", " +\
                version.copyright)
         tf = s.gettf().getthreadextraframe()
diff --git a/head/offlineimap/ui/__init__.py b/head/offlineimap/ui/__init__.py
index 87f226a..72a133c 100644
--- a/head/offlineimap/ui/__init__.py
+++ b/head/offlineimap/ui/__init__.py
@@ -1 +1,29 @@
-import TTY, UIBase, Tk
+# UI module directory
+# Copyright (C) 2002 John Goerzen
+# <jgoerzen@complete.org>
+#
+#    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+
+import TTY, UIBase, detector
+availableUIs = {'TTY': TTY, 'UIBase': UIBase}
+try:
+    import Tkinter
+except ImportError:
+    pass
+else:
+    import Tk
+    availableUIs['Tk'] = Tk
+
diff --git a/head/offlineimap/ui/detector.py b/head/offlineimap/ui/detector.py
new file mode 100644
index 0000000..ecc98c6
--- /dev/null
+++ b/head/offlineimap/ui/detector.py
@@ -0,0 +1,38 @@
+# UI base class
+# Copyright (C) 2002 John Goerzen
+# <jgoerzen@complete.org>
+#
+#    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+from offlineimap.ui import *
+import sys
+
+def findUI(config):
+    uistrlist = ['Tk.TKUI', 'TTY.TTYUI']
+    if config.has_option("general", "ui"):
+        uistrlist = config.get("general", "ui").replace(" ", "").split(",")
+    for uistr in uistrlist:
+        uimod = getUImod(uistr)
+        if uimod and uimod.isusable():
+            return uimod
+    sys.stderr.write("ERROR: No UIs were found usable!\n")
+    sys.exit(200)
+    
+def getUImod(uistr):
+    try:
+        uimod = eval(uistr)
+    except AttributeError, NameError:
+        return None
+    return uimod