mirror of
https://github.com/brl/mutter.git
synced 2024-11-25 09:30:45 -05:00
clutter/evdev: implement mouse keys support
Control the pointer using the numeric keypad. When enabled, creates a virtual pointer and emulate the pointer event based on keyboard events. https://bugzilla.gnome.org/show_bug.cgi?id=788564
This commit is contained in:
Olivier Fourdan
parent
356b4b0dc5
commit
bdf3f49a82
@ -27,6 +27,8 @@
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#include "clutter-build-config.h"
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#endif
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#include <math.h>
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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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@ -66,6 +68,7 @@ typedef struct _SlowKeysEventPending
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static void clear_slow_keys (ClutterInputDeviceEvdev *device);
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static void stop_bounce_keys (ClutterInputDeviceEvdev *device);
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static void stop_toggle_slowkeys (ClutterInputDeviceEvdev *device);
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static void stop_mousekeys_move (ClutterInputDeviceEvdev *device);
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static void
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clutter_input_device_evdev_finalize (GObject *object)
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@ -83,6 +86,7 @@ clutter_input_device_evdev_finalize (GObject *object)
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clear_slow_keys (device_evdev);
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stop_bounce_keys (device_evdev);
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stop_toggle_slowkeys (device_evdev);
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stop_mousekeys_move (device_evdev);
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G_OBJECT_CLASS (clutter_input_device_evdev_parent_class)->finalize (object);
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}
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@ -706,6 +710,408 @@ handle_togglekeys_release (ClutterEvent *event,
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}
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}
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static int
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get_button_index (gint button)
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{
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switch (button)
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{
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case BTN_LEFT:
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return 0;
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case BTN_MIDDLE:
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return 1;
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case BTN_RIGHT:
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return 2;
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default:
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break;
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}
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g_warn_if_reached ();
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return 0;
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}
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static void
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emulate_button_press (ClutterInputDeviceEvdev *device)
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{
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gint btn = device->mousekeys_btn;
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if (device->mousekeys_btn_states[get_button_index (btn)])
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return;
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clutter_virtual_input_device_notify_button (device->mousekeys_virtual_device,
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g_get_monotonic_time (), btn,
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CLUTTER_BUTTON_STATE_PRESSED);
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device->mousekeys_btn_states[get_button_index (btn)] = CLUTTER_BUTTON_STATE_PRESSED;
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}
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static void
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emulate_button_release (ClutterInputDeviceEvdev *device)
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{
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gint btn = device->mousekeys_btn;
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if (device->mousekeys_btn_states[get_button_index (btn)] == CLUTTER_BUTTON_STATE_RELEASED)
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return;
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clutter_virtual_input_device_notify_button (device->mousekeys_virtual_device,
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g_get_monotonic_time (), btn,
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CLUTTER_BUTTON_STATE_RELEASED);
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device->mousekeys_btn_states[get_button_index (btn)] = CLUTTER_BUTTON_STATE_RELEASED;
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}
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static void
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emulate_button_click (ClutterInputDeviceEvdev *device)
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{
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emulate_button_press (device);
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emulate_button_release (device);
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}
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#define MOUSEKEYS_CURVE (1.0 + (((double) 50.0) * 0.001))
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static void
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update_mousekeys_params (ClutterInputDeviceEvdev *device,
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ClutterKbdA11ySettings *settings)
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{
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/* Prevent us from broken settings values */
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device->mousekeys_max_speed = MAX (1, settings->mousekeys_max_speed);
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device->mousekeys_accel_time = MAX (1, settings->mousekeys_accel_time);
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device->mousekeys_init_delay = MAX (0, settings->mousekeys_init_delay);
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device->mousekeys_curve_factor =
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(((gdouble) device->mousekeys_max_speed) /
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pow ((gdouble) device->mousekeys_accel_time, MOUSEKEYS_CURVE));
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}
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static gdouble
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mousekeys_get_speed_factor (ClutterInputDeviceEvdev *device,
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gint64 time_us)
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{
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guint32 time;
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gint64 delta_t;
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gint64 init_time;
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gdouble speed;
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time = us2ms (time_us);
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if (device->mousekeys_first_motion_time == 0)
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{
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/* Start acceleration _after_ the first move, so take
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* mousekeys_init_delay into account for t0
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*/
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device->mousekeys_first_motion_time = time + device->mousekeys_init_delay;
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device->mousekeys_last_motion_time = device->mousekeys_first_motion_time;
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return 1.0;
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}
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init_time = time - device->mousekeys_first_motion_time;
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delta_t = time - device->mousekeys_last_motion_time;
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if (delta_t < 0)
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return 0.0;
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if (init_time < device->mousekeys_accel_time)
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speed = (double) (device->mousekeys_curve_factor *
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pow ((double) init_time, MOUSEKEYS_CURVE) * delta_t / 1000.0);
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else
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speed = (double) (device->mousekeys_max_speed * delta_t / 1000.0);
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device->mousekeys_last_motion_time = time;
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return speed;
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}
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#undef MOUSEKEYS_CURVE
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static void
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emulate_pointer_motion (ClutterInputDeviceEvdev *device,
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gint dx,
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gint dy)
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{
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gdouble dx_motion;
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gdouble dy_motion;
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gdouble speed;
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gint64 time_us;
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time_us = g_get_monotonic_time ();
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speed = mousekeys_get_speed_factor (device, time_us);
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if (dx < 0)
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dx_motion = floor (((gdouble) dx) * speed);
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else
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dx_motion = ceil (((gdouble) dx) * speed);
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if (dy < 0)
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dy_motion = floor (((gdouble) dy) * speed);
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else
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dy_motion = ceil (((gdouble) dy) * speed);
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clutter_virtual_input_device_notify_relative_motion (device->mousekeys_virtual_device,
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time_us, dx_motion, dy_motion);
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}
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static void
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enable_mousekeys (ClutterInputDeviceEvdev *device)
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{
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ClutterDeviceManager *manager;
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device->mousekeys_btn = BTN_LEFT;
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device->move_mousekeys_timer = 0;
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device->mousekeys_first_motion_time = 0;
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device->mousekeys_last_motion_time = 0;
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device->last_mousekeys_key = 0;
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if (device->mousekeys_virtual_device)
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return;
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manager = CLUTTER_INPUT_DEVICE (device)->device_manager;
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device->mousekeys_virtual_device =
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clutter_device_manager_create_virtual_device (manager,
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CLUTTER_POINTER_DEVICE);
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}
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static void
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disable_mousekeys (ClutterInputDeviceEvdev *device)
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{
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stop_mousekeys_move (device);
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/* Make sure we don't leave button pressed behind... */
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if (device->mousekeys_btn_states[get_button_index (BTN_LEFT)])
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{
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device->mousekeys_btn = BTN_LEFT;
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emulate_button_release (device);
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}
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if (device->mousekeys_btn_states[get_button_index (BTN_MIDDLE)])
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{
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device->mousekeys_btn = BTN_MIDDLE;
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emulate_button_release (device);
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}
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if (device->mousekeys_btn_states[get_button_index (BTN_RIGHT)])
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{
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device->mousekeys_btn = BTN_RIGHT;
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emulate_button_release (device);
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}
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if (device->mousekeys_virtual_device)
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g_clear_object (&device->mousekeys_virtual_device);
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}
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static gboolean
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trigger_mousekeys_move (gpointer data)
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{
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ClutterInputDeviceEvdev *device = data;
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gint dx = 0;
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gint dy = 0;
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if (device->mousekeys_first_motion_time == 0)
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{
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/* This is the first move, Secdule at mk_init_delay */
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device->move_mousekeys_timer =
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clutter_threads_add_timeout (device->mousekeys_init_delay,
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trigger_mousekeys_move,
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device);
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}
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else
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{
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/* More moves, reschedule at mk_interval */
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device->move_mousekeys_timer =
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clutter_threads_add_timeout (100, /* msec between mousekey events */
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trigger_mousekeys_move,
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device);
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}
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/* Pointer motion */
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switch (device->last_mousekeys_key)
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{
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case XKB_KEY_KP_Home:
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case XKB_KEY_KP_7:
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case XKB_KEY_KP_Up:
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case XKB_KEY_KP_8:
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case XKB_KEY_KP_Page_Up:
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case XKB_KEY_KP_9:
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dy = -1;
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break;
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case XKB_KEY_KP_End:
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case XKB_KEY_KP_1:
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case XKB_KEY_KP_Down:
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case XKB_KEY_KP_2:
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case XKB_KEY_KP_Page_Down:
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case XKB_KEY_KP_3:
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dy = 1;
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break;
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default:
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break;
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}
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switch (device->last_mousekeys_key)
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{
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case XKB_KEY_KP_Home:
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case XKB_KEY_KP_7:
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case XKB_KEY_KP_Left:
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case XKB_KEY_KP_4:
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case XKB_KEY_KP_End:
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case XKB_KEY_KP_1:
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dx = -1;
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break;
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case XKB_KEY_KP_Page_Up:
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case XKB_KEY_KP_9:
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case XKB_KEY_KP_Right:
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case XKB_KEY_KP_6:
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case XKB_KEY_KP_Page_Down:
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case XKB_KEY_KP_3:
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dx = 1;
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break;
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default:
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break;
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}
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if (dx != 0 || dy != 0)
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emulate_pointer_motion (device, dx, dy);
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/* We reschedule each time */
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return G_SOURCE_REMOVE;
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}
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static void
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stop_mousekeys_move (ClutterInputDeviceEvdev *device)
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{
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device->mousekeys_first_motion_time = 0;
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device->mousekeys_last_motion_time = 0;
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if (device->move_mousekeys_timer)
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{
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g_source_remove (device->move_mousekeys_timer);
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device->move_mousekeys_timer = 0;
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}
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}
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static void
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start_mousekeys_move (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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device->last_mousekeys_key = event->key.keyval;
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if (device->move_mousekeys_timer != 0)
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return;
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trigger_mousekeys_move (device);
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}
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static gboolean
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handle_mousekeys_press (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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if (!(event->key.flags & CLUTTER_EVENT_FLAG_SYNTHETIC))
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stop_mousekeys_move (device);
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/* Button selection */
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switch (event->key.keyval)
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{
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case XKB_KEY_KP_Divide:
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device->mousekeys_btn = BTN_LEFT;
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return TRUE;
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case XKB_KEY_KP_Multiply:
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device->mousekeys_btn = BTN_MIDDLE;
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return TRUE;
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case XKB_KEY_KP_Subtract:
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device->mousekeys_btn = BTN_RIGHT;
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return TRUE;
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default:
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break;
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}
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/* Button events */
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switch (event->key.keyval)
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{
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case XKB_KEY_KP_Begin:
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case XKB_KEY_KP_5:
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emulate_button_click (device);
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return TRUE;
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case XKB_KEY_KP_Insert:
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case XKB_KEY_KP_0:
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emulate_button_press (device);
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return TRUE;
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case XKB_KEY_KP_Decimal:
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case XKB_KEY_KP_Delete:
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emulate_button_release (device);
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return TRUE;
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case XKB_KEY_KP_Add:
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emulate_button_click (device);
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emulate_button_click (device);
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return TRUE;
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default:
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break;
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}
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/* Pointer motion */
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switch (event->key.keyval)
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{
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case XKB_KEY_KP_1:
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case XKB_KEY_KP_2:
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case XKB_KEY_KP_3:
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case XKB_KEY_KP_4:
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case XKB_KEY_KP_6:
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case XKB_KEY_KP_7:
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case XKB_KEY_KP_8:
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case XKB_KEY_KP_9:
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case XKB_KEY_KP_Down:
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case XKB_KEY_KP_End:
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case XKB_KEY_KP_Home:
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case XKB_KEY_KP_Left:
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case XKB_KEY_KP_Page_Down:
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case XKB_KEY_KP_Page_Up:
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case XKB_KEY_KP_Right:
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case XKB_KEY_KP_Up:
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start_mousekeys_move (event, device);
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return TRUE;
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default:
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break;
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}
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return FALSE;
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}
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static gboolean
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handle_mousekeys_release (ClutterEvent *event,
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ClutterInputDeviceEvdev *device)
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{
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switch (event->key.keyval)
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{
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case XKB_KEY_KP_0:
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case XKB_KEY_KP_1:
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case XKB_KEY_KP_2:
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case XKB_KEY_KP_3:
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case XKB_KEY_KP_4:
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case XKB_KEY_KP_5:
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case XKB_KEY_KP_6:
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case XKB_KEY_KP_7:
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case XKB_KEY_KP_8:
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case XKB_KEY_KP_9:
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case XKB_KEY_KP_Add:
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case XKB_KEY_KP_Begin:
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case XKB_KEY_KP_Decimal:
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case XKB_KEY_KP_Delete:
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case XKB_KEY_KP_Divide:
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case XKB_KEY_KP_Down:
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case XKB_KEY_KP_End:
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case XKB_KEY_KP_Home:
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case XKB_KEY_KP_Insert:
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case XKB_KEY_KP_Left:
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case XKB_KEY_KP_Multiply:
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case XKB_KEY_KP_Page_Down:
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case XKB_KEY_KP_Page_Up:
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case XKB_KEY_KP_Right:
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case XKB_KEY_KP_Subtract:
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case XKB_KEY_KP_Up:
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stop_mousekeys_move (device);
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return TRUE;
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default:
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break;
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}
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return FALSE;
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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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@ -716,6 +1122,16 @@ clutter_input_device_evdev_process_kbd_a11y_event (ClutterEvent *e
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if (!device_evdev->a11y_flags & CLUTTER_A11Y_KEYBOARD_ENABLED)
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goto emit_event;
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if (device_evdev->a11y_flags & CLUTTER_A11Y_MOUSE_KEYS_ENABLED)
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{
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if (event->type == CLUTTER_KEY_PRESS &&
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handle_mousekeys_press (event, device_evdev))
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return; /* swallow event */
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if (event->type == CLUTTER_KEY_RELEASE &&
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handle_mousekeys_release (event, device_evdev))
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return; /* swallow event */
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}
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if (device_evdev->a11y_flags & CLUTTER_A11Y_TOGGLE_KEYS_ENABLED)
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{
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if (event->type == CLUTTER_KEY_PRESS)
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@ -785,6 +1201,16 @@ clutter_input_device_evdev_apply_kbd_a11y_settings (ClutterInputDeviceEvdev *dev
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device->last_shift_time = 0;
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}
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if (changed_flags & (CLUTTER_A11Y_KEYBOARD_ENABLED | CLUTTER_A11Y_MOUSE_KEYS_ENABLED))
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{
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if (settings->controls &
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(CLUTTER_A11Y_KEYBOARD_ENABLED | CLUTTER_A11Y_MOUSE_KEYS_ENABLED))
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enable_mousekeys (device);
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else
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disable_mousekeys (device);
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}
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update_mousekeys_params (device, settings);
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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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@ -82,6 +82,17 @@ struct _ClutterInputDeviceEvdev
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guint toggle_slowkeys_timer;
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guint16 shift_count;
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guint32 last_shift_time;
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gint mousekeys_btn;
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gboolean mousekeys_btn_states[3];
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guint32 mousekeys_first_motion_time; /* ms */
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guint32 mousekeys_last_motion_time; /* ms */
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guint mousekeys_init_delay;
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guint mousekeys_accel_time;
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guint mousekeys_max_speed;
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gdouble mousekeys_curve_factor;
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guint move_mousekeys_timer;
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guint16 last_mousekeys_key;
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ClutterVirtualInputDevice *mousekeys_virtual_device;
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};
|
||||
|
||||
GType _clutter_input_device_evdev_get_type (void) G_GNUC_CONST;
|
||||
|
||||
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Reference in New Issue
Block a user