216 lines
6.9 KiB
Vala
216 lines
6.9 KiB
Vala
using X;
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namespace NeoLayoutViewer{
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/**
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* Modification of http://www.linux-nantes.org/~fmonnier/ocaml/Xlib/doc/Xlib.html by
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* Oliver Sauder <os@esite.ch>
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*/
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public class KeybindingManager : GLib.Object
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{
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private NeoWindow neo_win;
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private unowned Gdk.Window rootwin;
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private unowned X.Display* display = null;
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private unowned X.ID xid;
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/**
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* list of binded keybindings
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*/
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private Gee.List<Keybinding> bindings = new Gee.ArrayList<Keybinding>();
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/**
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* locked modifiers used to grab all keys whatever lock key
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* is pressed.
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*/
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private static uint[] lock_modifiers = {
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0,
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Gdk.ModifierType.MOD2_MASK, // NUM_LOCK
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Gdk.ModifierType.LOCK_MASK, // CAPS_LOCK
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Gdk.ModifierType.MOD5_MASK, // SCROLL_LOCK
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Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.LOCK_MASK,
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Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.MOD5_MASK,
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Gdk.ModifierType.LOCK_MASK|Gdk.ModifierType.MOD5_MASK,
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Gdk.ModifierType.MOD2_MASK|Gdk.ModifierType.LOCK_MASK|Gdk.ModifierType.MOD5_MASK
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};
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private int modifier_keycodes[10];
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//private bool modifier_pressed[10];//bad, because sizeof(bool,vala)!=sizeof(bool,c (stdbool.h))
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private int modifier_pressed[10];
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/**
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* Helper class to store keybinding
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*/
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private class Keybinding
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{
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public Keybinding(string accelerator, int keycode,
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Gdk.ModifierType modifiers, KeybindingHandlerFunc handler)
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{
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this.accelerator = accelerator;
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this.keycode = keycode;
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this.modifiers = modifiers;
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this.handler = handler;
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}
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public string accelerator { get; set; }
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public int keycode { get; set; }
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public Gdk.ModifierType modifiers { get; set; }
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public KeybindingHandlerFunc handler { get; set; }
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}
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/**
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* Keybinding func needed to bind key to handler
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*
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* @param event passing on gdk event
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*/
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public delegate void KeybindingHandlerFunc(Gdk.Event event);
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public KeybindingManager(NeoWindow neo_win)
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{
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this.neo_win = neo_win;
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// init filter to retrieve X.Events
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rootwin = Gdk.get_default_root_window();
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if(rootwin != null) {
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rootwin.add_filter(event_filter);
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display = Gdk.x11_drawable_get_xdisplay(rootwin);
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xid = Gdk.x11_drawable_get_xid(rootwin);
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modifier_keycodes[0] = display->keysym_to_keycode(XK_Shift_L);
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modifier_keycodes[1] = display->keysym_to_keycode(XK_Shift_R);
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//modifier_keycodes[2] = keysym_to_keycode(XK_ISO_Level3_Shift);/* not both keys detectable on this way */
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modifier_keycodes[2] = 66; //Mod3L can differ?!
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modifier_keycodes[3] = 51; //Mod3R
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modifier_keycodes[4] = 94; //Mod4L
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modifier_keycodes[5] = 108;//Mod4R
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modifier_keycodes[6] = display->keysym_to_keycode(XK_Control_L);
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modifier_keycodes[7] = display->keysym_to_keycode(XK_Control_R);
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modifier_keycodes[8] = display->keysym_to_keycode(XK_Alt_L);
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modifier_keycodes[9] = display->keysym_to_keycode(XK_Alt_R);
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Timeout.add (100, modifier_timer);
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}
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}
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/**
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* Bind accelerator to given handler
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*
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* @param accelerator accelerator parsable by Gtk.accelerator_parse
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* @param handler handler called when given accelerator is pressed
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*/
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public void bind(string accelerator, KeybindingHandlerFunc handler)
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{
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debug("Binding key " + accelerator);
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// convert accelerator
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uint keysym;
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Gdk.ModifierType modifiers;
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Gtk.accelerator_parse(accelerator, out keysym, out modifiers);
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int keycode = display->keysym_to_keycode(keysym);
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if(keycode != 0) {
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// trap XErrors to avoid closing of application
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// even when grabing of key fails
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Gdk.error_trap_push();
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// grab key finally
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// also grab all keys which are combined with a lock key such NumLock
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foreach(uint lock_modifier in lock_modifiers) {
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display->grab_key(keycode, modifiers|lock_modifier, xid, true, X.GrabMode.Async, X.GrabMode.Async);
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}
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// wait until all X request have been processed
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Gdk.flush();
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// store binding
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Keybinding binding = new Keybinding(accelerator, keycode, modifiers, handler);
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bindings.add(binding);
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debug("Successfully binded key " + accelerator);
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}
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}
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/**
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* Unbind given accelerator.
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*
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* @param accelerator accelerator parsable by Gtk.accelerator_parse
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*/
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public void unbind(string accelerator)
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{
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debug("Unbinding key " + accelerator);
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//Gdk.Window rootwin = Gdk.get_default_root_window();
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//unowned X.Display display = Gdk.x11_drawable_get_xdisplay(rootwin);
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//X.ID xid = Gdk.x11_drawable_get_xid(rootwin);
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// unbind all keys with given accelerator
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Gee.List<Keybinding> remove_bindings = new Gee.ArrayList<Keybinding>();
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foreach(Keybinding binding in bindings) {
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if(str_equal(accelerator, binding.accelerator)) {
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foreach(uint lock_modifier in lock_modifiers) {
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display->ungrab_key(binding.keycode, binding.modifiers, xid);
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}
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remove_bindings.add(binding);
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}
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}
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// remove unbinded keys
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bindings.remove_all(remove_bindings);
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debug("Successfully unbinded key " + accelerator);
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}
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/**
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* Event filter method needed to fetch X.Events
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*/
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public Gdk.FilterReturn event_filter(Gdk.XEvent gdk_xevent, Gdk.Event gdk_event)
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{
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Gdk.FilterReturn filter_return = Gdk.FilterReturn.CONTINUE;
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//Gdk.FilterReturn filter_return = Gdk.FilterReturn.REMOVE;
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void* pointer = &gdk_xevent;
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X.Event* xevent = (X.Event*) pointer;
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if(xevent->type == X.EventType.KeyPress) {
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foreach(Keybinding binding in bindings) {
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// remove NumLock, CapsLock and ScrollLock from key state
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uint event_mods = xevent.xkey.state & ~ (lock_modifiers[7]);
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if(xevent->xkey.keycode == binding.keycode && event_mods == binding.modifiers) {
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// call all handlers with pressed key and modifiers
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binding.handler(gdk_event);
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}
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}
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}
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return filter_return;
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}
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/*
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Checks periodical which modifier are pressed.
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*/
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private bool modifier_timer(){
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if(rootwin == null) {
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debug("Root window changed.");
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rootwin = Gdk.get_default_root_window();
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//rootwin.add_filter(event_filter);
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display = Gdk.x11_drawable_get_xdisplay(rootwin);
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xid = Gdk.x11_drawable_get_xid(rootwin);
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}
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checkModifier(display,&modifier_keycodes[0], modifier_keycodes.length, &modifier_pressed[0]);
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// Convert modifier keys to modifier/layer
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neo_win.change_active_modifier( 1, true, (int) ( ( modifier_pressed[0] | modifier_pressed[1] )
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!= (checkCapsLock(display)?1:0) ) );
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neo_win.change_active_modifier( 2, true, (int) ( modifier_pressed[2] | modifier_pressed[3] ) );
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neo_win.change_active_modifier( 3, true, (int) ( modifier_pressed[4] | modifier_pressed[5] ) );
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neo_win.change_active_modifier( 4, true, (int) ( modifier_pressed[6] | modifier_pressed[7] ) );
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neo_win.change_active_modifier( 5, true, (int) ( modifier_pressed[8] | modifier_pressed[9] ) );
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// stdout.printf(@"Mods: $(neo_win.active_modifier[1]), $(neo_win.active_modifier[2]), $(neo_win.active_modifier[3])\n" );
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neo_win.redraw();
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return true;
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}
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}// End KeybindingManager class
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}// End Namespace
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