Initial implementation of shortcut to windows

[PURPOSE]

In editors such as vi and emacs, a user can mark a line in a file with
a shortcut key and afterwards jump back to that line using the shortcut.

The idea is extended to opened windows. A user can assign a keyboard
shortcut to an opened window.  Afterwards, the shortcut can be used to
switch focus back to the marked window.

Such shortcuts save the user from pressing "alt+tab" multiple times to
cycle through windows until the desired one is found.

[EXAMPLE USAGE]

The following binding is added to file "~/.fluxbox/keys":

    Mod1 m ARG :MarkWindow

    Mod1 g ARG :GotoMarkedWindow

User enters "alt+m x" to mark the currently focused window with shortcut
key 'x'

User enters "alt+g x" to switch focus to the marked window

[IMPLEMENTATION SUMMARY]

- Two new commands were added :MarkWindow and :GotoMarkedWindow

- Keys.cc was modified:
    - addBinding() method supports parsing an argument placeholder where
      the user can pass in a shortcut key
    - doAction() method forwards the shortcut key to the command to execute
    - Class Keys::t_key was modified to recognize a placeholder key

- New class ShortcutManager was added to maintain mapping of shortcut
  keys to marked windows

1 files changed, 2 insertions, 1 deletions

diff --git a/src/fluxbox.cc b/src/fluxbox.cc
index 468ca33..a55bd29 100644
--- a/src/fluxbox.cc
+++ b/src/fluxbox.cc
@@ -272,7 +272,8 @@ Fluxbox::Fluxbox(int argc, char **argv,
       m_masked_window(0),
       m_argv(argv), m_argc(argc),
       m_showing_dialog(false),
-      m_server_grabs(0) {
+      m_server_grabs(0),
+      m_shortcut_manager(new ShortcutManager) {
 
     _FB_USES_NLS;