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namespace Caribou {
/**
* Object providing access to keyboard in scanning mode.
*/
public class Scanner : Object {
public bool bind_settings { get; construct; default=true; }
private ScanGrouping _scan_grouping;
public int scan_grouping {
get {
return (int) _scan_grouping;
}
set construct {
_scan_grouping = (ScanGrouping) value;
if (root_group != null)
root_group.scan_grouping = _scan_grouping;
reset ();
}
}
private bool _scan_enabled;
public bool scan_enabled {
get { return _scan_enabled; }
set construct {
_scan_enabled = value;
if (_scan_enabled)
enable ();
else
disable ();
}
}
private double _step_time;
public double step_time {
get { return _step_time; }
set construct {
_step_time = value;
if (scan_tid != 0) {
GLib.Source.remove (scan_tid);
scan_tid = GLib.Timeout.add ((int) (_step_time*1000), scan);
}
}
}
private string _switch_device;
public string switch_device {
get { return _switch_device; }
set construct {
_switch_device = value;
configure_switch ();
}
}
private string _keyboard_key;
public string keyboard_key {
get { return _keyboard_key; }
set construct {
_keyboard_key = value;
configure_switch ();
}
}
private int _mouse_button;
public int mouse_button {
get { return _mouse_button; }
set construct {
_mouse_button = value;
configure_switch ();
}
}
public int scan_cycles { get; set construct; default=1; }
public bool autorestart { get; set construct; default=false; }
public bool inverse_scanning { get; set construct; default=false; }
private delegate void UnconfigureSwitchFunc();
private UnconfigureSwitchFunc unconfigure_switch_func;
private uint scan_tid;
private KeyboardModel keyboard;
private IScannableGroup root_group;
private bool started;
construct {
/* defaults */
_scan_grouping = ScanGrouping.SUBGROUPS;
_step_time = 1.0;
_switch_device = "keyboard";
if (bind_settings)
do_bind_settings ();
}
private void do_bind_settings () {
Settings caribou_settings = new Settings ("org.gnome.caribou");
string[] settings = {"scan-grouping", "step-time", "scan-cycles",
"autorestart", "inverse-scanning", "switch-device",
"keyboard-key", "mouse-button", "scan-enabled"};
foreach (string setting in settings) {
caribou_settings.bind (setting, this, setting, SettingsBindFlags.GET);
}
}
private bool select () {
IScannableItem? item = root_group.child_select ();
if (item is IScannableGroup) {
step ();
return true;
} else {
reset ();
return false;
}
}
private void switch_pressed (uint code, bool pressed) {
if (pressed) {
if (!started) {
step ();
start ();
return;
}
stop ();
if (inverse_scanning) {
step ();
start ();
} else {
if (select () || autorestart)
start ();
}
}
}
public void set_keyboard (KeyboardModel keyboard) {
GroupModel group = keyboard.get_group(keyboard.active_group);
this.keyboard = keyboard;
this.keyboard.notify["active-group"].connect(on_group_changed);
set_active_level (group.get_level (group.active_level));
foreach (string group_name in keyboard.get_groups()) {
group = keyboard.get_group(group_name);
group.notify["active-level"].connect(on_level_changed);
}
}
private void on_level_changed (Object obj, ParamSpec prop) {
GroupModel group = (GroupModel) obj;
set_active_level (group.get_level (group.active_level));
}
private void on_group_changed (Object obj, ParamSpec prop) {
GroupModel group = keyboard.get_group(keyboard.active_group);
set_active_level (group.get_level (group.active_level));
}
private void set_active_level (LevelModel level) {
root_group = (IScannableGroup) level;
root_group.scan_grouping = _scan_grouping;
}
public void reset () {
if (root_group != null)
root_group.scan_reset ();
}
private void enable () {
configure_switch ();
}
private void disable () {
unconfigure_switch ();
}
private void start () {
if (started || root_group == null)
return;
started = true;
scan_tid = GLib.Timeout.add((int) (_step_time*1000), scan);
}
private void stop () {
if (!started)
return;
started = false;
if (scan_tid != 0)
GLib.Source.remove (scan_tid);
scan_tid = 0;
}
private IScannableItem? step () {
IScannableItem item = root_group.child_step (scan_cycles);
if (item == null) {
reset ();
}
return item;
}
private bool scan () {
if (inverse_scanning)
select ();
else
return (step () != null);
return true;
}
private void unconfigure_switch () {
if (unconfigure_switch_func != null)
unconfigure_switch_func ();
unconfigure_switch_func = null;
}
private void configure_switch () {
if (!scan_enabled)
return;
unconfigure_switch ();
DisplayAdapter xadapter = DisplayAdapter.get_default();
if (switch_device == "keyboard" && keyboard_key != null) {
uint keyval = Gdk.keyval_from_name (keyboard_key);
xadapter.register_key_func (keyval, switch_pressed);
unconfigure_switch_func = () => {
xadapter.register_key_func (keyval, null);
};
} else if (switch_device == "mouse" && mouse_button != 0) {
xadapter.register_button_func (mouse_button, switch_pressed);
unconfigure_switch_func = () => {
xadapter.register_key_func (mouse_button, null);
};
}
}
}
}
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