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Diffstat (limited to 'src/utilities/bindingManager.vala')
| -rw-r--r-- | src/utilities/bindingManager.vala | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/src/utilities/bindingManager.vala b/src/utilities/bindingManager.vala new file mode 100644 index 0000000..8795124 --- /dev/null +++ b/src/utilities/bindingManager.vala @@ -0,0 +1,196 @@ +/* +Copyright (c) 2011 by Simon Schneegans + +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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +namespace GnomePie { + +///////////////////////////////////////////////////////////////////////// +/// Globally binds key stroke to given ID's. When one of the bound +/// strokes is invoked, a signal with the according ID is emitted. +///////////////////////////////////////////////////////////////////////// + +public class BindingManager : GLib.Object { + + ///////////////////////////////////////////////////////////////////// + /// Called when a stored binding is invoked. The according ID is + /// passed as argument. + ///////////////////////////////////////////////////////////////////// + + public signal void on_press(string id); + + ///////////////////////////////////////////////////////////////////// + /// A list storing bindings, which are invoked even if Gnome-Pie + /// doesn't have the current focus + ///////////////////////////////////////////////////////////////////// + + private Gee.List<Keybinding> bindings = new Gee.ArrayList<Keybinding>(); + + ///////////////////////////////////////////////////////////////////// + /// Ignored modifier masks, used to grab all keys even if these locks + /// are active. + ///////////////////////////////////////////////////////////////////// + + private static uint[] lock_modifiers = { + 0, + Gdk.ModifierType.MOD2_MASK, + Gdk.ModifierType.LOCK_MASK, + Gdk.ModifierType.MOD5_MASK, + Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.LOCK_MASK, + Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.MOD5_MASK, + Gdk.ModifierType.LOCK_MASK|Gdk.ModifierType.MOD5_MASK, + Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.LOCK_MASK|Gdk.ModifierType.MOD5_MASK + }; + + ///////////////////////////////////////////////////////////////////// + /// Helper class to store keybinding + ///////////////////////////////////////////////////////////////////// + + private class Keybinding { + + public Keybinding(string accelerator, int keycode, Gdk.ModifierType modifiers, string id) { + this.accelerator = accelerator; + this.keycode = keycode; + this.modifiers = modifiers; + this.id = id; + } + + public string accelerator { get; set; } + public int keycode { get; set; } + public Gdk.ModifierType modifiers { get; set; } + public string id { get; set; } + } + + ///////////////////////////////////////////////////////////////////// + /// C'tor adds the event filter to the root window. + ///////////////////////////////////////////////////////////////////// + + public BindingManager() { + // init filter to retrieve X.Events + Gdk.Window rootwin = Gdk.get_default_root_window(); + if(rootwin != null) { + rootwin.add_filter(event_filter); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Binds the ID to the given accelerator. + ///////////////////////////////////////////////////////////////////// + + public void bind(string accelerator, string id) { + uint keysym; + Gdk.ModifierType modifiers; + Gtk.accelerator_parse(accelerator, out keysym, out modifiers); + + if (keysym == 0) { + warning("Invalid keystroke: " + accelerator); + return; + } + + Gdk.Window rootwin = Gdk.get_default_root_window(); + X.Display display = Gdk.x11_drawable_get_xdisplay(rootwin); + X.ID xid = Gdk.x11_drawable_get_xid(rootwin); + int keycode = display.keysym_to_keycode(keysym); + + if(keycode != 0) { + Gdk.error_trap_push(); + + foreach(uint lock_modifier in lock_modifiers) { + display.grab_key(keycode, modifiers|lock_modifier, xid, false, X.GrabMode.Async, X.GrabMode.Async); + } + + Gdk.flush(); + + Keybinding binding = new Keybinding(accelerator, keycode, modifiers, id); + bindings.add(binding); + } + } + + ///////////////////////////////////////////////////////////////////// + /// Unbinds the accelerator of the given ID. + ///////////////////////////////////////////////////////////////////// + + public void unbind(string id) { + Gdk.Window rootwin = Gdk.get_default_root_window(); + X.Display display = Gdk.x11_drawable_get_xdisplay(rootwin); + X.ID xid = Gdk.x11_drawable_get_xid(rootwin); + Gee.List<Keybinding> remove_bindings = new Gee.ArrayList<Keybinding>(); + foreach(var binding in bindings) { + if(id == binding.id) { + foreach(uint lock_modifier in lock_modifiers) { + display.ungrab_key(binding.keycode, binding.modifiers, xid); + } + remove_bindings.add(binding); + } + } + + bindings.remove_all(remove_bindings); + } + + ///////////////////////////////////////////////////////////////////// + /// Returns a human readable accelerator for the given ID. + ///////////////////////////////////////////////////////////////////// + + public string get_accelerator_label_of(string id) { + string accelerator = this.get_accelerator_of(id); + + if (accelerator == "") + return _("Not bound"); + + uint key = 0; + Gdk.ModifierType mods; + Gtk.accelerator_parse(accelerator, out key, out mods); + return Gtk.accelerator_get_label(key, mods); + } + + ///////////////////////////////////////////////////////////////////// + /// Returns the accelerator to which the given ID is bound. + ///////////////////////////////////////////////////////////////////// + + public string get_accelerator_of(string id) { + foreach (var binding in bindings) { + if (binding.id == id) { + return binding.accelerator; + } + } + + return ""; + } + + ///////////////////////////////////////////////////////////////////// + /// Event filter method needed to fetch X.Events + ///////////////////////////////////////////////////////////////////// + + private Gdk.FilterReturn event_filter(Gdk.XEvent gdk_xevent, Gdk.Event gdk_event) { + Gdk.FilterReturn filter_return = Gdk.FilterReturn.CONTINUE; + + void* pointer = &gdk_xevent; + X.Event* xevent = (X.Event*) pointer; + + if(xevent->type == X.EventType.KeyPress) { + foreach(var binding in bindings) { + // remove NumLock, CapsLock and ScrollLock from key state + uint event_mods = xevent.xkey.state & ~ (lock_modifiers[7]); + if(xevent->xkey.keycode == binding.keycode && event_mods == binding.modifiers) { + on_press(binding.id); + } + } + } + + return filter_return; + } +} + +} |