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clutter/evdev: implement sticky keys support
One key press on a modifier latches it, two consecutive presses lock it. https://bugzilla.gnome.org/show_bug.cgi?id=788564
This commit is contained in:
Olivier Fourdan
parent
96ebd1c214
commit
06d976e853
@ -28,6 +28,7 @@
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#endif
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#include "clutter/clutter-device-manager-private.h"
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#include "clutter/clutter-event-private.h"
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#include "clutter-private.h"
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#include "clutter-evdev.h"
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#include "clutter-input-device-tool-evdev.h"
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@ -406,6 +407,190 @@ debounce_key (ClutterEvent *event,
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return (device->debounce_key == ((ClutterKeyEvent *) event)->hardware_keycode);
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}
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static gboolean
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key_event_is_modifier (ClutterEvent *event)
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{
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switch (event->key.keyval)
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{
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case XKB_KEY_Shift_L:
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case XKB_KEY_Shift_R:
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case XKB_KEY_Control_L:
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case XKB_KEY_Control_R:
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case XKB_KEY_Alt_L:
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case XKB_KEY_Alt_R:
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case XKB_KEY_Meta_L:
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case XKB_KEY_Meta_R:
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case XKB_KEY_Super_L:
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case XKB_KEY_Super_R:
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case XKB_KEY_Hyper_L:
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case XKB_KEY_Hyper_R:
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return TRUE;
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default:
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return FALSE;
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}
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}
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static void
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notify_stickykeys_mask (ClutterInputDeviceEvdev *device)
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{
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g_signal_emit_by_name (CLUTTER_INPUT_DEVICE (device)->device_manager,
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"kbd-a11y-mods-state-changed",
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device->stickykeys_latched_mask,
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device->stickykeys_locked_mask);
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}
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static void
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update_internal_xkb_state (ClutterInputDeviceEvdev *device,
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xkb_mod_mask_t new_latched_mask,
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xkb_mod_mask_t new_locked_mask)
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{
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ClutterSeatEvdev *seat = device->seat;
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xkb_mod_mask_t depressed_mods;
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xkb_mod_mask_t latched_mods;
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xkb_mod_mask_t locked_mods;
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xkb_mod_mask_t group_mods;
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depressed_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_DEPRESSED);
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latched_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_LATCHED);
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locked_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_LOCKED);
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latched_mods &= ~device->stickykeys_latched_mask;
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locked_mods &= ~device->stickykeys_locked_mask;
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device->stickykeys_latched_mask = new_latched_mask;
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device->stickykeys_locked_mask = new_locked_mask;
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latched_mods |= device->stickykeys_latched_mask;
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locked_mods |= device->stickykeys_locked_mask;
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group_mods = xkb_state_serialize_layout (seat->xkb, XKB_STATE_LAYOUT_EFFECTIVE);
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xkb_state_update_mask (seat->xkb,
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depressed_mods,
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latched_mods,
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locked_mods,
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0, 0, group_mods);
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notify_stickykeys_mask (device);
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}
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static void
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update_stickykeys_event (ClutterEvent *event,
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ClutterInputDeviceEvdev *device,
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xkb_mod_mask_t new_latched_mask,
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xkb_mod_mask_t new_locked_mask)
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{
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ClutterSeatEvdev *seat = device->seat;
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xkb_mod_mask_t effective_mods;
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xkb_mod_mask_t latched_mods;
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xkb_mod_mask_t locked_mods;
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update_internal_xkb_state (device, new_latched_mask, new_locked_mask);
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effective_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_EFFECTIVE);
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latched_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_LATCHED);
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locked_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_LOCKED);
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_clutter_event_set_state_full (event,
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seat->button_state,
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device->stickykeys_depressed_mask,
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latched_mods,
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locked_mods,
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effective_mods | seat->button_state);
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}
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static void
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notify_stickykeys_change (ClutterInputDeviceEvdev *device)
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{
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/* Everytime sticky keys setting is changed, clear the masks */
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device->stickykeys_depressed_mask = 0;
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update_internal_xkb_state (device, 0, 0);
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g_signal_emit_by_name (CLUTTER_INPUT_DEVICE (device)->device_manager,
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"kbd-a11y-flags-changed",
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device->a11y_flags,
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CLUTTER_A11Y_STICKY_KEYS_ENABLED);
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}
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static void
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set_stickykeys_off (ClutterInputDeviceEvdev *device)
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{
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device->a11y_flags &= ~CLUTTER_A11Y_STICKY_KEYS_ENABLED;
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notify_stickykeys_change (device);
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}
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static void
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clear_stickykeys_event (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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set_stickykeys_off (device);
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update_stickykeys_event (event, device, 0, 0);
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}
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static void
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handle_stickykeys_press (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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ClutterSeatEvdev *seat = device->seat;
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xkb_mod_mask_t depressed_mods;
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xkb_mod_mask_t new_latched_mask;
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xkb_mod_mask_t new_locked_mask;
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if (!key_event_is_modifier (event))
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return;
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if (device->stickykeys_depressed_mask &&
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(device->a11y_flags & CLUTTER_A11Y_STICKY_KEYS_TWO_KEY_OFF))
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{
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clear_stickykeys_event (event, device);
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return;
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}
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depressed_mods = xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_DEPRESSED);
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new_latched_mask = device->stickykeys_latched_mask;
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new_locked_mask = device->stickykeys_locked_mask;
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device->stickykeys_depressed_mask = depressed_mods;
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if (new_locked_mask & depressed_mods)
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{
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new_locked_mask &= ~depressed_mods;
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}
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else if (new_latched_mask & depressed_mods)
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{
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new_locked_mask |= depressed_mods;
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new_latched_mask &= ~depressed_mods;
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}
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else
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{
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new_latched_mask |= depressed_mods;
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}
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update_stickykeys_event (event, device, new_latched_mask, new_locked_mask);
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}
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static void
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handle_stickykeys_release (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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ClutterSeatEvdev *seat = device->seat;
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device->stickykeys_depressed_mask =
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xkb_state_serialize_mods (seat->xkb, XKB_STATE_MODS_DEPRESSED);
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if (key_event_is_modifier (event))
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{
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if (device->a11y_flags & CLUTTER_A11Y_STICKY_KEYS_BEEP)
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clutter_input_device_evdev_bell_notify ();
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return;
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}
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if (device->stickykeys_latched_mask == 0)
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return;
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update_stickykeys_event (event, device, 0, device->stickykeys_locked_mask);
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}
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static void
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clutter_input_device_evdev_process_kbd_a11y_event (ClutterEvent *event,
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ClutterInputDevice *device,
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@ -440,6 +625,14 @@ clutter_input_device_evdev_process_kbd_a11y_event (ClutterEvent *e
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return;
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}
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if (device_evdev->a11y_flags & CLUTTER_A11Y_STICKY_KEYS_ENABLED)
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{
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if (event->type == CLUTTER_KEY_PRESS)
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handle_stickykeys_press (event, device_evdev);
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else if (event->type == CLUTTER_KEY_RELEASE)
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handle_stickykeys_release (event, device_evdev);
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}
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emit_event:
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emit_event_func (event, device);
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}
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@ -456,6 +649,12 @@ clutter_input_device_evdev_apply_kbd_a11y_settings (ClutterInputDeviceEvdev *dev
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if (changed_flags & (CLUTTER_A11Y_KEYBOARD_ENABLED | CLUTTER_A11Y_BOUNCE_KEYS_ENABLED))
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device->debounce_key = 0;
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if (changed_flags & (CLUTTER_A11Y_KEYBOARD_ENABLED | CLUTTER_A11Y_STICKY_KEYS_ENABLED))
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{
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device->stickykeys_depressed_mask = 0;
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update_internal_xkb_state (device, 0, 0);
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}
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/* Keep our own copy of keyboard a11y features flags to see what changes */
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device->a11y_flags = settings->controls;
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}
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@ -76,6 +76,9 @@ struct _ClutterInputDeviceEvdev
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GList *slow_keys_list;
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guint debounce_timer;
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guint16 debounce_key;
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xkb_mod_mask_t stickykeys_depressed_mask;
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xkb_mod_mask_t stickykeys_latched_mask;
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xkb_mod_mask_t stickykeys_locked_mask;
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};
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GType _clutter_input_device_evdev_get_type (void) G_GNUC_CONST;
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