]> Dogcows Code - chaz/openbox/blob - openbox/client.h
i dont like this "application window" concept. swap it with "helper" windows instead...
[chaz/openbox] / openbox / client.h
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3 client.h for the Openbox window manager
4 Copyright (c) 2006 Mikael Magnusson
5 Copyright (c) 2003-2007 Dana Jansens
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #ifndef __client_h
21 #define __client_h
22
23 #include "misc.h"
24 #include "mwm.h"
25 #include "geom.h"
26 #include "stacking.h"
27 #include "render/color.h"
28
29 #include <glib.h>
30 #include <X11/Xlib.h>
31
32 struct _ObFrame;
33 struct _ObGroup;
34 struct _ObSessionState;
35
36 typedef struct _ObClient ObClient;
37 typedef struct _ObClientIcon ObClientIcon;
38 typedef struct _ObAppSettings ObAppSettings;
39
40 /* The value in client.transient_for indicating it is a transient for its
41 group instead of for a single window */
42 #define OB_TRAN_GROUP ((void*)~0l)
43
44 /*! Holds an icon in ARGB format */
45 struct _ObClientIcon
46 {
47 gint width;
48 gint height;
49 RrPixel32 *data;
50 };
51
52 /*! Possible window types */
53 typedef enum
54 {
55 OB_CLIENT_TYPE_DESKTOP, /*!< A desktop (bottom-most window) */
56 OB_CLIENT_TYPE_DOCK, /*!< A dock bar/panel window */
57 OB_CLIENT_TYPE_TOOLBAR, /*!< A toolbar window, pulled off an app */
58 OB_CLIENT_TYPE_MENU, /*!< An unpinned menu from an app */
59 OB_CLIENT_TYPE_UTILITY, /*!< A small utility window such as a palette */
60 OB_CLIENT_TYPE_SPLASH, /*!< A splash screen window */
61 OB_CLIENT_TYPE_DIALOG, /*!< A dialog window */
62 OB_CLIENT_TYPE_NORMAL /*!< A normal application window */
63 } ObClientType;
64
65 /*! The things the user can do to the client window */
66 typedef enum
67 {
68 OB_CLIENT_FUNC_RESIZE = 1 << 0, /*!< Allow user resizing */
69 OB_CLIENT_FUNC_MOVE = 1 << 1, /*!< Allow user moving */
70 OB_CLIENT_FUNC_ICONIFY = 1 << 2, /*!< Allow to be iconified */
71 OB_CLIENT_FUNC_MAXIMIZE = 1 << 3, /*!< Allow to be maximized */
72 OB_CLIENT_FUNC_SHADE = 1 << 4, /*!< Allow to be shaded */
73 OB_CLIENT_FUNC_FULLSCREEN = 1 << 5, /*!< Allow to be made fullscreen */
74 OB_CLIENT_FUNC_CLOSE = 1 << 6 /*!< Allow to be closed */
75 } ObFunctions;
76
77 struct _ObClient
78 {
79 ObWindow obwin;
80
81 Window window;
82
83 /*! The window's decorations. NULL while the window is being managed! */
84 struct _ObFrame *frame;
85
86 /*! The number of unmap events to ignore on the window */
87 gint ignore_unmaps;
88
89 /*! The id of the group the window belongs to */
90 struct _ObGroup *group;
91
92 /*! Saved session data to apply to this client */
93 struct _ObSessionState *session;
94
95 /*! Whether or not the client is a transient window. This is guaranteed to
96 be TRUE if transient_for != NULL, but not guaranteed to be FALSE if
97 transient_for == NULL. */
98 gboolean transient;
99 /*! The client which this client is a transient (child) for.
100 A value of TRAN_GROUP signifies that the window is a transient for all
101 members of its ObGroup, and is not a valid pointer to be followed in this
102 case.
103 */
104 ObClient *transient_for;
105 /*! The clients which are transients (children) of this client */
106 GSList *transients;
107 /*! The desktop on which the window resides (0xffffffff for all
108 desktops) */
109 guint desktop;
110
111 /*! The startup id for the startup-notification protocol. This will be
112 NULL if a startup id is not set. */
113 gchar *startup_id;
114
115 /*! Normal window title */
116 gchar *title;
117 /*! Window title when iconified */
118 gchar *icon_title;
119 /*! Hostname of machine running the client */
120 gchar *client_machine;
121 /*! The command used to run the program. Pre-XSMP window identification. */
122 gchar *wm_command;
123
124 /*! The application that created the window */
125 gchar *name;
126 /*! The class of the window, can used for grouping */
127 gchar *class;
128 /*! The specified role of the window, used for identification */
129 gchar *role;
130 /*! The session client id for the window. *This can be NULL!* */
131 gchar *sm_client_id;
132
133 /*! The type of window (what its function is) */
134 ObClientType type;
135
136 /*! Position and size of the window
137 This will not always be the actual position of the window on screen, it
138 is, rather, the position requested by the client, to which the window's
139 gravity is applied.
140 */
141 Rect area;
142
143 /*! Position of the client window relative to the root window */
144 Point root_pos;
145
146 /*! Position and size of the window prior to being maximized */
147 Rect pre_max_area;
148 /*! Position and size of the window prior to being fullscreened */
149 Rect pre_fullscreen_area;
150
151 /*! The window's strut
152 The strut defines areas of the screen that are marked off-bounds for
153 window placement. In theory, where this window exists.
154 */
155 StrutPartial strut;
156
157 /*! The logical size of the window
158 The "logical" size of the window is refers to the user's perception of
159 the size of the window, and is the value that should be displayed to the
160 user. For example, with xterms, this value it the number of characters
161 being displayed in the terminal, instead of the number of pixels.
162 */
163 Size logical_size;
164
165 /*! Width of the border on the window.
166 The window manager will set this to 0 while the window is being managed,
167 but needs to restore it afterwards, so it is saved here.
168 */
169 guint border_width;
170
171 /*! The minimum aspect ratio the client window can be sized to.
172 A value of 0 means this is ignored.
173 */
174 gfloat min_ratio;
175 /*! The maximum aspect ratio the client window can be sized to.
176 A value of 0 means this is ignored.
177 */
178 gfloat max_ratio;
179
180 /*! The minimum size of the client window
181 If the min is > the max, then the window is not resizable
182 */
183 Size min_size;
184 /*! The maximum size of the client window
185 If the min is > the max, then the window is not resizable
186 */
187 Size max_size;
188 /*! The size of increments to resize the client window by */
189 Size size_inc;
190 /*! The base size of the client window
191 This value should be subtracted from the window's actual size when
192 displaying its size to the user, or working with its min/max size
193 */
194 Size base_size;
195
196 /*! Window decoration and functionality hints */
197 ObMwmHints mwmhints;
198
199 /*! The client's specified colormap */
200 Colormap colormap;
201
202 /*! Where to place the decorated window in relation to the undecorated
203 window */
204 gint gravity;
205
206 /*! The state of the window, one of WithdrawnState, IconicState, or
207 NormalState */
208 glong wmstate;
209
210 /*! True if the client supports the delete_window protocol */
211 gboolean delete_window;
212
213 /*! Was the window's position requested by the application or the user?
214 if by the application, we force it completely onscreen, if by the user
215 we only force it if it tries to go completely offscreen, if neither, we
216 should place the window ourselves when it first appears */
217 guint positioned;
218
219 /*! Can the window receive input focus? */
220 gboolean can_focus;
221 /*! Notify the window when it receives focus? */
222 gboolean focus_notify;
223
224 #ifdef SYNC
225 /*! The client wants to sync during resizes */
226 gboolean sync_request;
227 /*! The XSync counter used for synchronizing during resizes */
228 guint32 sync_counter;
229 /*! The value we're waiting for the counter to reach */
230 gulong sync_counter_value;
231 #endif
232
233 /*! The window uses shape extension to be non-rectangular? */
234 gboolean shaped;
235
236 /*! The window is modal, so it must be processed before any windows it is
237 related to can be focused */
238 gboolean modal;
239 /*! Only the window's titlebar is displayed */
240 gboolean shaded;
241 /*! The window is iconified */
242 gboolean iconic;
243 /*! The window is maximized to fill the screen vertically */
244 gboolean max_vert;
245 /*! The window is maximized to fill the screen horizontally */
246 gboolean max_horz;
247 /*! The window should not be displayed by pagers */
248 gboolean skip_pager;
249 /*! The window should not be displayed by taskbars */
250 gboolean skip_taskbar;
251 /*! The window is a 'fullscreen' window, and should be on top of all
252 others */
253 gboolean fullscreen;
254 /*! The window should be on top of other windows of the same type.
255 above takes priority over below. */
256 gboolean above;
257 /*! The window should be underneath other windows of the same type.
258 above takes priority over below. */
259 gboolean below;
260 /*! Demands attention flag */
261 gboolean demands_attention;
262
263 /*! The urgent flag */
264 gboolean urgent;
265
266 /*! The layer in which the window will be stacked, windows in lower layers
267 are always below windows in higher layers. */
268 ObStackingLayer layer;
269
270 /*! A bitmask of values in the ObFrameDecorations enum
271 The values in the variable are the decorations that the client wants to
272 be displayed around it.
273 */
274 guint decorations;
275
276 /*! A user option. When this is set to TRUE the client will not ever
277 be decorated.
278 */
279 gboolean undecorated;
280
281 /*! A bitmask of values in the ObFunctions enum
282 The values in the variable specify the ways in which the user is allowed
283 to modify this window.
284 */
285 guint functions;
286
287 /*! Icons for the client as specified on the client window */
288 ObClientIcon *icons;
289 /*! The number of icons in icons */
290 guint nicons;
291
292 /* Where the window should iconify to/from */
293 Rect icon_geometry;
294
295 guint32 user_time;
296 };
297
298 extern GList *client_list;
299
300 void client_startup(gboolean reconfig);
301 void client_shutdown(gboolean reconfig);
302
303 typedef void (*ObClientCallback)(ObClient *client, gpointer data);
304
305 /* Callback functions */
306
307 /*! Get notified when the client is unmanaged */
308 void client_add_destructor(ObClientCallback func, gpointer data);
309 void client_remove_destructor(ObClientCallback func);
310
311 /*! Get notified when the client changes desktop */
312 void client_add_desktop_notify(ObClientCallback func, gpointer data);
313 void client_remove_desktop_notify(ObClientCallback func);
314
315 /*! Manages all existing windows */
316 void client_manage_all();
317 /*! Manages a given window */
318 void client_manage(Window win);
319 /*! Unmanages all managed windows */
320 void client_unmanage_all();
321 /*! Unmanages a given client */
322 void client_unmanage(ObClient *client);
323
324 /*! Sets the client list on the root window from the client_list */
325 void client_set_list();
326
327 /*! Determines if the client should be shown or hidden currently.
328 @return TRUE if it should be visible; otherwise, FALSE.
329 */
330 gboolean client_should_show(ObClient *self);
331
332 /*! Returns if the window should be treated as a normal window.
333 Some windows (desktops, docks, splash screens) have special rules applied
334 to them in a number of places regarding focus or user interaction. */
335 gboolean client_normal(ObClient *self);
336
337 /*! Returns if the window is one of an application's helper windows
338 (utilty, menu, etc) */
339 gboolean client_helper(ObClient *self);
340
341 /* Returns if the window is focused */
342 gboolean client_focused(ObClient *self);
343
344 /*! Convery a position/size from a given gravity to the client's true gravity
345 */
346 void client_convert_gravity(ObClient *client, gint gravity, gint *x, gint *y,
347 gint w, gint h);
348
349 #define client_move(self, x, y) \
350 client_configure(self, x, y, self->area.width, self->area.height, \
351 TRUE, TRUE)
352 #define client_resize(self, w, h) \
353 client_configure(self, self->area.x, self->area.y, w, h, TRUE, TRUE)
354 #define client_move_resize(self, x, y, w, h) \
355 client_configure(self, x, y, w, h, TRUE, TRUE)
356
357 #define client_configure(self, x, y, w, h, user, final) \
358 client_configure_full(self, x, y, w, h, user, final, FALSE)
359
360 /*! Figure out where a window will end up and what size it will be if you
361 told it to move/resize to these coordinates.
362
363 These values are what client_configure_full will give the window.
364
365 @param x The x coordiante of the new position for the client.
366 @param y The y coordiante of the new position for the client.
367 @param w The width component of the new size for the client.
368 @param h The height component of the new size for the client.
369 @param logicalw Returns the width component of the new logical width.
370 This value is only returned when the new w or h calculated
371 differ from the ones passed in.
372 @param logicalh Returns the height component of the new logical height.
373 This value is only returned when the new w or h calculated
374 differ from the ones passed in.
375 @param user Specifies whether this is a user-requested change or a
376 program requested change. For program requested changes, the
377 constraints are not checked.
378 */
379 void client_try_configure(ObClient *self, gint *x, gint *y, gint *w, gint *h,
380 gint *logicalw, gint *logicalh,
381 gboolean user);
382
383 /*! Move and/or resize the window.
384 This also maintains things like the client's minsize, and size increments.
385 @param x The x coordiante of the new position for the client.
386 @param y The y coordiante of the new position for the client.
387 @param w The width component of the new size for the client.
388 @param h The height component of the new size for the client.
389 @param user Specifies whether this is a user-requested change or a
390 program requested change. For program requested changes, the
391 constraints are not checked.
392 @param final If user is true, then this should specify if this is a final
393 configuration. e.g. Final should be FALSE if doing an
394 interactive move/resize, and then be TRUE for the last call
395 only.
396 @param force_reply Send a ConfigureNotify to the client regardless of if
397 the position changed.
398 */
399 void client_configure_full(ObClient *self, gint x, gint y, gint w, gint h,
400 gboolean user, gboolean final,
401 gboolean force_reply);
402
403 void client_reconfigure(ObClient *self);
404
405 /*! Finds coordinates to keep a client on the screen.
406 @param self The client
407 @param x The x coord of the client, may be changed.
408 @param y The y coord of the client, may be changed.
409 @param w The width of the client.
410 @param w The height of the client.
411 @param rude Be rude about it. If false, it is only moved if it is entirely
412 not visible. If true, then make sure the window is inside the
413 struts if possible.
414 @return true if the client was moved to be on-screen; false if not.
415 */
416 gboolean client_find_onscreen(ObClient *self, gint *x, gint *y, gint w, gint h,
417 gboolean rude);
418
419 /*! Moves a client so that it is on screen if it is entirely out of the
420 viewable screen.
421 @param self The client to move
422 @param rude Be rude about it. If false, it is only moved if it is entirely
423 not visible. If true, then make sure the window is inside the
424 struts if possible.
425 */
426 void client_move_onscreen(ObClient *self, gboolean rude);
427
428 /*! Fullscreen's or unfullscreen's the client window
429 @param fs true if the window should be made fullscreen; false if it should
430 be returned to normal state.
431 */
432 void client_fullscreen(ObClient *self, gboolean fs);
433
434 /*! Iconifies or uniconifies the client window
435 @param iconic true if the window should be iconified; false if it should be
436 restored.
437 @param curdesk If iconic is FALSE, then this determines if the window will
438 be uniconified to the current viewable desktop (true) or to
439 its previous desktop (false)
440 */
441 void client_iconify(ObClient *self, gboolean iconic, gboolean curdesk);
442
443 /*! Maximize or unmaximize the client window
444 @param max true if the window should be maximized; false if it should be
445 returned to normal size.
446 @param dir 0 to set both horz and vert, 1 to set horz, 2 to set vert.
447 */
448 void client_maximize(ObClient *self, gboolean max, gint dir);
449
450 /*! Shades or unshades the client window
451 @param shade true if the window should be shaded; false if it should be
452 unshaded.
453 */
454 void client_shade(ObClient *self, gboolean shade);
455
456 /*! Hilite the window to make the user notice it */
457 void client_hilite(ObClient *self, gboolean hilite);
458
459 /*! Request the client to close its window */
460 void client_close(ObClient *self);
461
462 /*! Kill the client off violently */
463 void client_kill(ObClient *self);
464
465 /*! Sends the window to the specified desktop
466 @param donthide If TRUE, the window will not be shown/hidden after its
467 desktop has been changed. Generally this should be FALSE.
468 @param focus_nonintrusive If TRUE, the window will not be moved in the
469 focus order at all. Do this when moving windows to a desktop in
470 the "background" or something. It can be used to make a window share
471 multiple desktops. Generally this should be FALSE. */
472 void client_set_desktop(ObClient *self, guint target,
473 gboolean donthide, gboolean focus_nonintrusive);
474
475 /*! Show the client if it should be shown. */
476 void client_show(ObClient *self);
477
478 /*! Show the client if it should be shown. */
479 void client_hide(ObClient *self);
480
481 /*! Show the client if it should be shown, and hide it if it should be
482 hidden. This is for example, when switching desktops.
483 */
484 void client_showhide(ObClient *self);
485
486 /*! Validate client, by making sure no Destroy or Unmap events exist in
487 the event queue for the window.
488 @return true if the client is valid; false if the client has already
489 been unmapped/destroyed, and so is invalid.
490 */
491 gboolean client_validate(ObClient *self);
492
493 /*! Sets the wm_state to the specified value */
494 void client_set_wm_state(ObClient *self, glong state);
495
496 /*! Adjusts the window's net_state
497 This should not be called as part of the window mapping process! It is for
498 use when updating the state post-mapping.<br>
499 client_apply_startup_state is used to do the same things during the mapping
500 process.
501 */
502 void client_set_state(ObClient *self, Atom action, glong data1, glong data2);
503
504 /* Given a ObClient, find the client that focus would actually be sent to if
505 you wanted to give focus to the specified ObClient. Will return the same
506 ObClient passed to it or another ObClient if appropriate. */
507 ObClient *client_focus_target(ObClient *self);
508
509 /*! Returns what client_focus would return if passed the same client, but
510 without focusing it or modifying the focus order lists. */
511 gboolean client_can_focus(ObClient *self);
512
513 /*! Attempt to focus the client window
514 NOTE: You should validate the client before calling this !! (client_validate)
515 */
516 gboolean client_focus(ObClient *self);
517
518 /*! Activates the client for use, focusing, uniconifying it, etc. To be used
519 when the user deliberately selects a window for use.
520 @param here If true, then the client is brought to the current desktop;
521 otherwise, the desktop is changed to where the client lives.
522 @param user If true, then a user action is what requested the activation;
523 otherwise, it means an application requested it on its own
524 */
525 void client_activate(ObClient *self, gboolean here, gboolean user);
526
527 /*! Bring all of its helper windows to its desktop. These are the utility and
528 stuff windows. */
529 void client_bring_helper_windows(ObClient *client);
530
531 /*! Calculates the stacking layer for the client window */
532 void client_calc_layer(ObClient *self);
533
534 /*! Raises the client to the top of its stacking layer
535 Normally actions call to the client_* functions to make stuff go, but this
536 one is an exception. It just fires off an action, which will be queued.
537 This is because stacking order rules can be changed by focus state, and so
538 any time focus changes you have to wait for it to complete before you can
539 properly restart windows. As such, this only queues an action for later
540 execution, once the focus change has gone through.
541 */
542 void client_raise(ObClient *self);
543
544 /*! Lowers the client to the bottom of its stacking layer
545 Normally actions call to the client_* functions to make stuff go, but this
546 one is an exception. It just fires off an action, which will be queued.
547 This is because stacking order rules can be changed by focus state, and so
548 any time focus changes you have to wait for it to complete before you can
549 properly restart windows. As such, this only queues an action for later
550 execution, once the focus change has gone through.
551 */
552 void client_lower(ObClient *self);
553
554 /*! Updates the window's transient status, and any parents of it */
555 void client_update_transient_for(ObClient *self);
556 /*! Update the protocols that the window supports and adjusts things if they
557 change */
558 void client_update_protocols(ObClient *self);
559 #ifdef SYNC
560 /*! Updates the window's sync request counter for resizes */
561 void client_update_sync_request_counter(ObClient *self);
562 #endif
563 /*! Updates the window's colormap */
564 void client_update_colormap(ObClient *self, Colormap colormap);
565 /*! Updates the WMNormalHints and adjusts things if they change */
566 void client_update_normal_hints(ObClient *self);
567
568 /*! Updates the WMHints and adjusts things if they change
569 @param initstate Whether to read the initial_state property from the
570 WMHints. This should only be used during the mapping
571 process.
572 */
573 void client_update_wmhints(ObClient *self);
574 /*! Updates the window's title and icon title */
575 void client_update_title(ObClient *self);
576 /*! Updates the strut for the client */
577 void client_update_strut(ObClient *self);
578 /*! Updates the window's icons */
579 void client_update_icons(ObClient *self);
580 /*! Updates the window's user time */
581 void client_update_user_time(ObClient *self);
582 /*! Updates the window's icon geometry (where to iconify to/from) */
583 void client_update_icon_geometry(ObClient *self);
584
585 /*! Set up what decor should be shown on the window and what functions should
586 be allowed (ObClient::decorations and ObClient::functions).
587 This also updates the NET_WM_ALLOWED_ACTIONS hint.
588 */
589 void client_setup_decor_and_functions(ObClient *self);
590
591 /*! Retrieves the window's type and sets ObClient->type */
592 void client_get_type(ObClient *self);
593
594 const ObClientIcon *client_icon(ObClient *self, gint w, gint h);
595
596 /*! Searches a client's direct parents for a focused window. The function does
597 not check for the passed client, only for *ONE LEVEL* of its parents.
598 If no focused parentt is found, NULL is returned.
599 */
600 ObClient *client_search_focus_parent(ObClient *self);
601
602 /*! Searches a client's transients for a focused window. The function does not
603 check for the passed client, only for its transients.
604 If no focused transient is found, NULL is returned.
605 */
606 ObClient *client_search_focus_tree(ObClient *self);
607
608 /*! Searches a client's transient tree for a focused window. The function
609 searches up the tree and down other branches as well as the passed client's.
610 If no focused client is found, NULL is returned.
611 */
612 ObClient *client_search_focus_tree_full(ObClient *self);
613
614 /*! Return a modal child of the client window that can be focused.
615 @return A modal child of the client window that can be focused, or 0 if
616 none was found.
617 */
618 ObClient *client_search_modal_child(ObClient *self);
619
620 /*! Returns a list of top-level windows which this is a transient for.
621 It will only contain more than 1 element if the client is transient for its
622 group.
623 */
624 GSList *client_search_all_top_parents(ObClient *self);
625
626 /*! Returns a list of top-level windows which this is a transient for, and
627 which are in the same layer as this client.
628 It will only contain more than 1 element if the client is transient for its
629 group.
630 */
631 GSList *client_search_all_top_parents_layer(ObClient *self);
632
633 /*! Returns a window's top level parent. This only counts direct parents,
634 not groups if it is transient for its group.
635 */
636 ObClient *client_search_top_normal_parent(ObClient *self);
637
638 /*! Is one client a direct child of another (i.e. not through the group.) */
639 gboolean client_is_direct_child(ObClient *parent, ObClient *child);
640
641 /*! Search for a parent of a client. This only searches up *ONE LEVEL*, and
642 returns the searched for parent if it is a parent, or NULL if not. */
643 ObClient *client_search_parent(ObClient *self, ObClient *search);
644
645 /*! Search for a transient of a client. The transient is returned if it is one,
646 NULL is returned if the given search is not a transient of the client. */
647 ObClient *client_search_transient(ObClient *self, ObClient *search);
648
649 /*! Return the closest edge in the given direction */
650 gint client_directional_edge_search(ObClient *c, ObDirection dir, gboolean hang);
651
652 /*! Set a client window to be above/below other clients.
653 @layer < 0 indicates the client should be placed below other clients.<br>
654 = 0 indicates the client should be placed with other clients.<br>
655 > 0 indicates the client should be placed above other clients.
656 */
657 void client_set_layer(ObClient *self, gint layer);
658
659 /*! Set a client window to have decorations or not */
660 void client_set_undecorated(ObClient *self, gboolean undecorated);
661
662 guint client_monitor(ObClient *self);
663
664 ObClient* client_under_pointer();
665
666 gboolean client_has_group_siblings(ObClient *self);
667
668 /*! Returns if a client has an group siblings which are main application
669 windows (not helper or non-normal windows) */
670 gboolean client_has_non_helper_group_siblings(ObClient *self);
671
672 #endif
This page took 0.065524 seconds and 5 git commands to generate.