add functionality to screen-profiles-helper to change the escape key

sequence

debian/changelog

@@ -10,9 +10,10 @@ screen-profiles (1.12) UNRELEASED; urgency=low
 
   [ Dustin Kirkland and Nicolas Barcet]
   * screen-profiles-helper: add HOME, SHARE, DOC global variables and use
-    them where possible
+    them where possible; add functionality to change the escape key
+    sequence
 
- -- Dustin Kirkland <kirkland@ubuntu.com>  Tue, 20 Jan 2009 23:06:36 -0600
+ -- Dustin Kirkland <kirkland@ubuntu.com>  Tue, 20 Jan 2009 23:41:20 -0600
 
 screen-profiles (1.11-0ubuntu1) jaunty; urgency=low
 

screen-profiles-helper

@@ -1,6 +1,6 @@
 #! /usr/bin/env python
 #
-#    GNU screen-profiles-helper
+#    screen-profiles-helper
 #    Copyright (C) 2008 Canonical Ltd.
 #
 #    Authors: Nick Barcet <nick.barcet@ubuntu.com>
@@ -24,6 +24,7 @@ from snack import *
 HOME=os.getenv("HOME")
 SHARE='/usr/share/screen-profiles'
 DOC='/usr/share/doc/screen-profiles'
+DEF_ESC="A"
 
 gettext.bindtextdomain('screen-profiles-helper', SHARE+'/po')
 gettext.textdomain('screen-profiles-helper')
@@ -66,15 +67,16 @@ def menu(screen, size, isInstalled):
         installtext=_("Install screen by default at login")
 
 
-    li = Listbox(height = 5, width = 60, returnExit = 1)
+    li = Listbox(height = 6, width = 60, returnExit = 1)
     li.append(_("Help"), 1)
     li.append(_("Change screen profile"), 2)
-    li.append(_("Create new window(s)"), 3)
-    li.append(_("Manage default windows"), 4)
-    li.append(installtext, 5)
+    li.append(_("Change escape sequence"), 3)
+    li.append(_("Create new window(s)"), 4)
+    li.append(_("Manage default windows"), 5)
+    li.append(installtext, 6)
     bb = ButtonBar(screen, ((_("Ok"), "ok"), (_("Exit"), "exit")), compact = 1)
 
-    g = GridForm(screen, _("GNU Screen Profiles Menu"), 1, 2)
+    g = GridForm(screen, _("Screen Profiles Menu"), 1, 2)
     g.add(li, 0, 0, padding=(4,2,4,2))
     g.add(bb, 0, 1, padding=(1,1,0,0))
 
@@ -113,7 +115,7 @@ def help(screen, size, config):
 
     cb=Checkbox(_("Display this help on startup"), isOn=cbOn)
 
-    g = GridForm(screen, _("GNU Screen Profiles Help"), 1, 3)
+    g = GridForm(screen, _("Screen Profiles Help"), 1, 3)
     g.add(t, 0, 0, padding=(0,0,0,0))
     g.add(cb, 0, 1, padding=(1,0,0,0))
     g.add(bb, 0, 2, padding=(1,1,0,0))
@@ -320,6 +322,66 @@ def install(screen, size, isInstalled):
 
         return 101
 
+def getesckey():
+    path=HOME+'/.screenrc-keybindings'
+    if not os.path.exists(path):
+        return DEF_ESC
+    line = commands.getoutput("grep ^escape "+path)
+    if line == "":
+        return DEF_ESC
+    return line[line.find('^')+1]
+
+def setesckey(key):
+    path = HOME+'/.screenrc-keybindings'
+    if key != "":
+        val = key[0].upper()+key[0].lower()
+        if os.path.exists(path):
+            out = commands.getoutput("grep ^escape "+path)
+            if out != "":
+                out = commands.getoutput("sed -i -e 's/^escape \^.*/escape ^"+val+"/' "+path)
+                return
+        f = open(path, 'a')
+        try:
+            f.write("escape ^"+val+"\n")
+        except IOError:
+            return
+        finally:
+            f.close()
+
+def chgesc(screen, size):
+    esc=Entry(2, text=getesckey(), returnExit=1)
+    escl=Label(_("Escape key: ctrl-"))
+    bb = ButtonBar(screen, ((_("Save"), "save"), (_("Cancel"), "cancel")), compact = 1)
+    g = GridForm(screen, _("Change escape sequence:"), 2, 4 )
+    g.add(escl, 0, 0, anchorLeft=1, padding=(1,0,0,1))
+    g.add(esc, 1, 0, anchorLeft=1)
+    g.add(bb, 1, 1)
+    g.setTimer(100)
+    loop=1
+    while loop:
+        which=g.run()
+        if which == "TIMER":
+            val=esc.value()
+            if len(val) > 1:
+                esc.set(val[1])
+            # Ensure that the escape sequence is not set to a number
+            try:
+                dummy = int(esc.value())
+                esc.set(DEF_ESC)
+            except:
+               # do nothing
+               dummy = "foo"
+        else:
+            loop=0
+    screen.popWindow()
+    if bb.buttonPressed(which) != "cancel":
+        setesckey(esc.value())
+        button = messagebox(screen, 60, 2, _("Message"), \
+            _("Restart screen to enact your changes."), \
+            buttons=((_("Ok"),"ok"), (_("Exit"), "exit")) )
+        if button == "exit":
+            return 0
+    return 100
 
 def main():
     """This is the main loop of our screen helper.
@@ -327,7 +389,7 @@ def main():
 
     size = terminal_size()
     screen = SnackScreen()
-    screen.drawRootText(1,0,_('GNU Screen Profiles Helper'))
+    screen.drawRootText(1,0,_('Screen Profiles Helper'))
     screen.pushHelpLine(_('<Tab>/<Alt-Tab> between elements | <Return> Validates'))
 
     config = SafeConfigParser()
@@ -354,10 +416,12 @@ def main():
         elif tag == 2:
             tag = profile(screen, size)
 	elif tag == 3:
-            tag = newwindow(screen, size)
+            tag = chgesc(screen, size)
         elif tag == 4:
-            tag = defaultwindows(screen, size)
+            tag = newwindow(screen, size)
         elif tag == 5:
+            tag = defaultwindows(screen, size)
+        elif tag == 6:
             tag = install(screen, size, isInstalled)
             isInstalled=(tag == 100)