summaryrefslogtreecommitdiff
path: root/src/gpm-button.c
blob: 15d7625f1e42bf9c13008a5fa1210adf52da9817 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2006-2007 Richard Hughes <richard@hughsie.com>
 * Copyright (C) 2012-2021 MATE Developers
 *
 * Licensed under the GNU General Public License Version 2
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <string.h>
#include <glib.h>
#include <glib/gi18n.h>

#include <X11/X.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>
#include <X11/XF86keysym.h>
#include <libupower-glib/upower.h>

#include "gpm-common.h"
#include "gpm-button.h"

static void     gpm_button_finalize   (GObject	      *object);

struct GpmButtonPrivate
{
	GdkScreen		*screen;
	GdkWindow		*window;
	GHashTable		*keysym_to_name_hash;
	gchar			*last_button;
	GTimer			*timer;
	gboolean		 lid_is_closed;
	UpClient		*client;
};

enum {
	BUTTON_PRESSED,
	LAST_SIGNAL
};

static guint signals [LAST_SIGNAL] = { 0 };
static gpointer gpm_button_object = NULL;

G_DEFINE_TYPE_WITH_PRIVATE (GpmButton, gpm_button, G_TYPE_OBJECT)

#define GPM_BUTTON_DUPLICATE_TIMEOUT	0.125f

/**
 * gpm_button_emit_type:
 **/
static gboolean
gpm_button_emit_type (GpmButton *button, const gchar *type)
{
	g_return_val_if_fail (GPM_IS_BUTTON (button), FALSE);

	/* did we just have this button before the timeout? */
	if (g_strcmp0 (type, button->priv->last_button) == 0 &&
	    g_timer_elapsed (button->priv->timer, NULL) < GPM_BUTTON_DUPLICATE_TIMEOUT) {
		g_debug ("ignoring duplicate button %s", type);
		return FALSE;
	}

	g_debug ("emitting button-pressed : %s", type);
	g_signal_emit (button, signals [BUTTON_PRESSED], 0, type);

	/* save type and last size */
	g_free (button->priv->last_button);
	button->priv->last_button = g_strdup (type);
	g_timer_reset (button->priv->timer);

	return TRUE;
}

/**
 * gpm_button_filter_x_events:
 **/
static GdkFilterReturn
gpm_button_filter_x_events (GdkXEvent *xevent, GdkEvent *event, gpointer data)
{
	GpmButton *button = (GpmButton *) data;
	XEvent *xev = (XEvent *) xevent;
	guint keycode;
	const gchar *key;
	gchar *keycode_str;

	if (xev->type != KeyPress)
		return GDK_FILTER_CONTINUE;

	keycode = xev->xkey.keycode;

	/* is the key string already in our DB? */
	keycode_str = g_strdup_printf ("0x%x", keycode);
	key = g_hash_table_lookup (button->priv->keysym_to_name_hash, (gpointer) keycode_str);
	g_free (keycode_str);

	/* found anything? */
	if (key == NULL) {
		g_debug ("Key %i not found in hash", keycode);
		/* pass normal keypresses on, which might help with accessibility access */
		return GDK_FILTER_CONTINUE;
	}

	g_debug ("Key %i mapped to key %s", keycode, key);
	gpm_button_emit_type (button, key);

	return GDK_FILTER_REMOVE;
}

/**
 * gpm_button_grab_keystring:
 * @button: This button class instance
 * @keystr: The key string, e.g. "<Control><Alt>F11"
 * @hashkey: A unique key made up from the modmask and keycode suitable for
 *           referencing in a hashtable.
 *           You must free this string, or specify NULL to ignore.
 *
 * Grab the key specified in the key string.
 *
 * Return value: TRUE if we parsed and grabbed okay
 **/
static gboolean
gpm_button_grab_keystring (GpmButton *button, guint64 keycode)
{
	guint modmask = AnyModifier;
	Display *display;
	GdkDisplay *gdkdisplay;
	gint ret;

	/* get the current X Display */
	display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default());

	/* don't abort on error */
	gdkdisplay = gdk_display_get_default ();
	gdk_x11_display_error_trap_push (gdkdisplay);

	/* grab the key if possible */
	ret = XGrabKey (display, keycode, modmask,
			GDK_WINDOW_XID (button->priv->window), True,
			GrabModeAsync, GrabModeAsync);
	if (ret == BadAccess) {
		g_warning ("Failed to grab modmask=%u, keycode=%li",
			     modmask, (long int) keycode);
		return FALSE;
	}

	/* grab the lock key if possible */
	ret = XGrabKey (display, keycode, LockMask | modmask,
			GDK_WINDOW_XID (button->priv->window), True,
			GrabModeAsync, GrabModeAsync);
	if (ret == BadAccess) {
		g_warning ("Failed to grab modmask=%u, keycode=%li",
			     LockMask | modmask, (long int) keycode);
		return FALSE;
	}

	/* we are not processing the error */
	gdk_display_flush (gdkdisplay);
	gdk_x11_display_error_trap_pop_ignored (gdkdisplay);

	g_debug ("Grabbed modmask=%x, keycode=%li", modmask, (long int) keycode);
	return TRUE;
}

/**
 * gpm_button_grab_keystring:
 * @button: This button class instance
 * @keystr: The key string, e.g. "<Control><Alt>F11"
 * @hashkey: A unique key made up from the modmask and keycode suitable for
 *           referencing in a hashtable.
 *           You must free this string, or specify NULL to ignore.
 *
 * Grab the key specified in the key string.
 *
 * Return value: TRUE if we parsed and grabbed okay
 **/
static gboolean
gpm_button_xevent_key (GpmButton *button, guint keysym, const gchar *key_name)
{
	gchar *key = NULL;
	gboolean ret;
	gchar *keycode_str;
	guint keycode;

	/* convert from keysym to keycode */
	keycode = XKeysymToKeycode (GDK_DISPLAY_XDISPLAY (gdk_display_get_default()), keysym);
	if (keycode == 0) {
		g_warning ("could not map keysym %x to keycode", keysym);
		return FALSE;
	}

	/* is the key string already in our DB? */
	keycode_str = g_strdup_printf ("0x%x", keycode);
	key = g_hash_table_lookup (button->priv->keysym_to_name_hash, (gpointer) keycode_str);
	if (key != NULL) {
		g_warning ("found in hash %i", keycode);
		g_free (keycode_str);
		return FALSE;
	}

	/* try to register X event */
	ret = gpm_button_grab_keystring (button, keycode);
	if (!ret) {
		g_warning ("Failed to grab %i", keycode);
		g_free (keycode_str);
		return FALSE;
	}

	/* add to hash table */
	g_hash_table_insert (button->priv->keysym_to_name_hash, (gpointer) keycode_str, (gpointer) g_strdup (key_name));

	/* the key is freed in the hash function unref */
	return TRUE;
}

/**
 * gpm_button_class_init:
 * @button: This class instance
 **/
static void
gpm_button_class_init (GpmButtonClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);
	object_class->finalize = gpm_button_finalize;

	signals [BUTTON_PRESSED] =
		g_signal_new ("button-pressed",
			      G_TYPE_FROM_CLASS (object_class),
			      G_SIGNAL_RUN_LAST,
			      G_STRUCT_OFFSET (GpmButtonClass, button_pressed),
			      NULL, NULL,
			      g_cclosure_marshal_VOID__STRING,
			      G_TYPE_NONE, 1, G_TYPE_STRING);
}

/**
 * gpm_button_is_lid_closed:
 **/
gboolean
gpm_button_is_lid_closed (GpmButton *button)
{
	GDBusProxy *proxy;
	GVariant *res, *inner;
	gboolean lid;
	GError *error = NULL;

	g_return_val_if_fail (GPM_IS_BUTTON (button), FALSE);

	if (LOGIND_RUNNING()) {
		proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
						       G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
						       NULL,
						       "org.freedesktop.UPower",
						       "/org/freedesktop/UPower",
						       "org.freedesktop.DBus.Properties",
						       NULL,
						       &error );
		if (proxy == NULL) {
			g_error("Error connecting to dbus - %s", error->message);
			g_error_free (error);
			return -1;
		}

		res = g_dbus_proxy_call_sync (proxy, "Get",
					      g_variant_new( "(ss)",
							     "org.freedesktop.UPower",
							     "LidIsClosed"),
					      G_DBUS_CALL_FLAGS_NONE,
					      -1,
					      NULL,
					      &error
					      );
		if (error == NULL && res != NULL) {
			g_variant_get(res, "(v)", &inner );
			lid = g_variant_get_boolean(inner);
			g_variant_unref (inner);
			g_variant_unref (res);
			return lid;
		} else if (error != NULL ) {
			g_error ("Error in dbus - %s", error->message);
			g_error_free (error);
		}
		g_object_unref(proxy);

		return FALSE;
	}
	else {
		return up_client_get_lid_is_closed (button->priv->client);
	}
}


/**
 * gpm_button_reset_time:
 *
 * We have to refresh the event time on resume to handle duplicate buttons
 * properly when the time is significant when we suspend.
 **/
gboolean
gpm_button_reset_time (GpmButton *button)
{
	g_return_val_if_fail (GPM_IS_BUTTON (button), FALSE);
	g_timer_reset (button->priv->timer);
	return TRUE;
}

/**
 * gpm_button_client_changed_cb
 **/
static void
gpm_button_client_changed_cb (UpClient *client, GParamSpec *pspec, GpmButton *button)
{
	gboolean lid_is_closed;

	/* get new state */
	lid_is_closed = gpm_button_is_lid_closed(button);

	/* same state */
	if (button->priv->lid_is_closed == lid_is_closed)
		return;

	/* save state */
	button->priv->lid_is_closed = lid_is_closed;

	/* sent correct event */
	if (lid_is_closed)
		gpm_button_emit_type (button, GPM_BUTTON_LID_CLOSED);
	else
		gpm_button_emit_type (button, GPM_BUTTON_LID_OPEN);
}

/**
 * gpm_button_init:
 * @button: This class instance
 **/
static void
gpm_button_init (GpmButton *button)
{
	button->priv = gpm_button_get_instance_private (button);

	button->priv->screen = gdk_screen_get_default ();
	button->priv->window = gdk_screen_get_root_window (button->priv->screen);

	button->priv->keysym_to_name_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
	button->priv->last_button = NULL;
	button->priv->timer = g_timer_new ();

	button->priv->client = up_client_new ();
	button->priv->lid_is_closed = up_client_get_lid_is_closed (button->priv->client);
	g_signal_connect (button->priv->client, "notify",
			  G_CALLBACK (gpm_button_client_changed_cb), button);
	/* register the brightness keys */
	gpm_button_xevent_key (button, XF86XK_PowerOff, GPM_BUTTON_POWER);

	/* The kernel messes up suspend/hibernate in some places. One of
	 * them is the key names. Unfortunately, they refuse to see the
	 * errors of their way in the name of 'compatibility'. Meh
	 */
	gpm_button_xevent_key (button, XF86XK_Suspend, GPM_BUTTON_HIBERNATE);
	gpm_button_xevent_key (button, XF86XK_Sleep, GPM_BUTTON_SUSPEND); /* should be configurable */
	gpm_button_xevent_key (button, XF86XK_Hibernate, GPM_BUTTON_HIBERNATE);
	gpm_button_xevent_key (button, XF86XK_MonBrightnessUp, GPM_BUTTON_BRIGHT_UP);
	gpm_button_xevent_key (button, XF86XK_MonBrightnessDown, GPM_BUTTON_BRIGHT_DOWN);
	gpm_button_xevent_key (button, XF86XK_ScreenSaver, GPM_BUTTON_LOCK);
	gpm_button_xevent_key (button, XF86XK_Battery, GPM_BUTTON_BATTERY);
	gpm_button_xevent_key (button, XF86XK_KbdBrightnessUp, GPM_BUTTON_KBD_BRIGHT_UP);
	gpm_button_xevent_key (button, XF86XK_KbdBrightnessDown, GPM_BUTTON_KBD_BRIGHT_DOWN);
	gpm_button_xevent_key (button, XF86XK_KbdLightOnOff, GPM_BUTTON_KBD_BRIGHT_TOGGLE);

	/* use global filter */
	gdk_window_add_filter (button->priv->window,
			       gpm_button_filter_x_events, (gpointer) button);
}

/**
 * gpm_button_finalize:
 * @object: This class instance
 **/
static void
gpm_button_finalize (GObject *object)
{
	GpmButton *button;
	g_return_if_fail (object != NULL);
	g_return_if_fail (GPM_IS_BUTTON (object));

	button = GPM_BUTTON (object);
	button->priv = gpm_button_get_instance_private (button);

	g_object_unref (button->priv->client);
	g_free (button->priv->last_button);
	g_timer_destroy (button->priv->timer);

	g_hash_table_unref (button->priv->keysym_to_name_hash);

	G_OBJECT_CLASS (gpm_button_parent_class)->finalize (object);
}

/**
 * gpm_button_new:
 * Return value: new class instance.
 **/
GpmButton *
gpm_button_new (void)
{
	if (gpm_button_object != NULL) {
		g_object_ref (gpm_button_object);
	} else {
		gpm_button_object = g_object_new (GPM_TYPE_BUTTON, NULL);
		g_object_add_weak_pointer (gpm_button_object, &gpm_button_object);
	}
	return GPM_BUTTON (gpm_button_object);
}