Dogcows Code - chaz/openbox/blob - openbox/focus.c

   1 #include "event.h"
   2 #include "openbox.h"
   3 #include "client.h"
   4 #include "frame.h"
   5 #include "screen.h"
   6 #include "prop.h"
   7 #include "dispatch.h"
   8 #include "focus.h"
   9 #include "parse.h"
  10 #include "engine.h"
  11
  12 #include <X11/Xlib.h>
  13 #include <glib.h>
  14
  15 Client *focus_client = NULL;
  16 GList **focus_order = NULL; /* these lists are created when screen_startup
  17                                sets the number of desktops */
  18
  19 Window focus_backup = None;
  20 gboolean focus_new = TRUE;
  21 gboolean focus_follow = FALSE;
  22 static gboolean focus_last = TRUE;
  23 static gboolean focus_last_on_desktop = TRUE;
  24
  25 static gboolean noreorder = 0;
  26
  27 static void parse_assign(char *name, ParseToken *value)
  28 {
  29     if (!g_ascii_strcasecmp(name, "focusnew")) {
  30         if (value->type != TOKEN_BOOL)
  31             yyerror("invalid value");
  32         else {
  33             focus_new = value->data.bool;
  34         }
  35     } else if (!g_ascii_strcasecmp(name, "followmouse")) {
  36         if (value->type != TOKEN_BOOL)
  37             yyerror("invalid value");
  38         else {
  39             focus_follow = value->data.bool;
  40         }
  41     } else if (!g_ascii_strcasecmp(name, "focuslast")) {
  42         if (value->type != TOKEN_BOOL)
  43             yyerror("invalid value");
  44         else {
  45             focus_last = value->data.bool;
  46         }
  47     } else if (!g_ascii_strcasecmp(name, "focuslastondesktop")) {
  48         if (value->type != TOKEN_BOOL)
  49             yyerror("invalid value");
  50         else {
  51             focus_last_on_desktop = value->data.bool;
  52         }
  53     } else
  54         yyerror("invalid option");
  55     parse_free_token(value);
  56 }
  57
  58 void focus_startup()
  59 {
  60     /* create the window which gets focus when no clients get it. Have to
  61        make it override-redirect so we don't try manage it, since it is
  62        mapped. */
  63     XSetWindowAttributes attrib;
  64
  65     focus_client = NULL;
  66     focus_new = TRUE;
  67     focus_follow = FALSE;
  68     focus_last = TRUE;
  69     focus_last_on_desktop = TRUE;
  70
  71     attrib.override_redirect = TRUE;
  72     focus_backup = XCreateWindow(ob_display, ob_root,
  73                                  -100, -100, 1, 1, 0,
  74                                  CopyFromParent, InputOutput, CopyFromParent,
  75                                  CWOverrideRedirect, &attrib);
  76     XMapRaised(ob_display, focus_backup);
  77
  78     /* start with nothing focused */
  79     focus_set_client(NULL);
  80
  81     parse_reg_section("focus", NULL, parse_assign);
  82 }
  83
  84 void focus_shutdown()
  85 {
  86     guint i;
  87
  88     for (i = 0; i < screen_num_desktops; ++i)
  89         g_list_free(focus_order[i]);
  90     g_free(focus_order);
  91     focus_order = NULL;
  92
  93     XDestroyWindow(ob_display, focus_backup);
  94
  95     /* reset focus to root */
  96     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  97                    event_lasttime);
  98 }
  99
 100 static void push_to_top(Client *client)
 101 {
 102     guint desktop;
 103
 104     desktop = client->desktop;
 105     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
 106     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
 107     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
 108 }
 109
 110 void focus_set_client(Client *client)
 111 {
 112     Window active;
 113     Client *old;
 114
 115     /* uninstall the old colormap, and install the new one */
 116     screen_install_colormap(focus_client, FALSE);
 117     screen_install_colormap(client, TRUE);
 118
 119     if (client == NULL) {
 120         /* when nothing will be focused, send focus to the backup target */
 121         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
 122                        event_lasttime);
 123         XSync(ob_display, FALSE);
 124     }
 125
 126     old = focus_client;
 127     focus_client = client;
 128
 129     /* move to the top of the list */
 130     if (noreorder)
 131         --noreorder;
 132     else if (client != NULL)
 133         push_to_top(client);
 134
 135     /* set the NET_ACTIVE_WINDOW hint */
 136     active = client ? client->window : None;
 137     PROP_SET32(ob_root, net_active_window, window, active);
 138
 139     if (focus_client != NULL)
 140         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 141     if (old != NULL)
 142         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 143 }
 144
 145 static gboolean focus_under_pointer()
 146 {
 147     Window w;
 148     int i, x, y;
 149     guint u;
 150     GList *it;
 151
 152     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 153         for (it = stacking_list; it != NULL; it = it->next) {
 154             Client *c = it->data;
 155             if (c->desktop == screen_desktop &&
 156                 RECT_CONTAINS(c->frame->area, x, y))
 157                 break;
 158         }
 159         if (it != NULL)
 160             return client_normal(it->data) && client_focus(it->data);
 161     }
 162     return FALSE;
 163 }
 164
 165 void focus_fallback(gboolean switching_desks)
 166 {
 167     GList *it;
 168     Client *old = NULL;
 169
 170     old = focus_client;
 171
 172     /* unfocus any focused clients.. they can be focused by Pointer events
 173        and such, and then when I try focus them, I won't get a FocusIn event
 174        at all for them.
 175     */
 176     focus_set_client(NULL);
 177
 178     if (switching_desks) {
 179         /* don't skip any windows when switching desktops */
 180         old = NULL;
 181     }
 182
 183     if (!(switching_desks ? focus_last_on_desktop : focus_last)) {
 184         if (focus_follow) focus_under_pointer();
 185         return;
 186     }
 187
 188     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 189         if (it->data != old && client_normal(it->data))
 190             if (client_focus(it->data))
 191                 return;
 192
 193     /* nothing to focus */
 194     focus_set_client(NULL);
 195 }
 196
 197 void focus_cycle(gboolean forward, gboolean linear, gboolean done,
 198                  gboolean cancel)
 199 {
 200     static Client *first = NULL;
 201     static Client *t = NULL;
 202     static GList *order = NULL;
 203     GList *it, *start, *list;
 204     Client *ft;
 205
 206     if (cancel) {
 207         if (first) client_focus(first);
 208         goto done_cycle;
 209     } else if (done) {
 210         if (focus_client) {
 211             push_to_top(focus_client); /* move to top of focus_order */
 212             stacking_raise(focus_client);
 213         }
 214         goto done_cycle;
 215     }
 216     if (!first) first = focus_client;
 217
 218     if (linear) list = client_list;
 219     else        list = focus_order[screen_desktop];
 220
 221     start = it = g_list_find(list, focus_client);
 222     if (!start) /* switched desktops or something? */
 223         start = it = forward ? g_list_last(list) : g_list_first(list);
 224     if (!start) goto done_cycle;
 225
 226     do {
 227         if (forward) {
 228             it = it->next;
 229             if (it == NULL) it = list;
 230         } else {
 231             it = it->prev;
 232             if (it == NULL) it = g_list_last(list);
 233         }
 234         ft = client_focus_target(it->data);
 235         if (ft == it->data && focus_client != ft && client_focusable(ft)) {
 236             if (client_focus(ft)) {
 237                 noreorder++; /* avoid reordering the focus_order */
 238                 break;
 239             }
 240         }
 241     } while (it != start);
 242     return;
 243
 244 done_cycle:
 245     t = NULL;
 246     first = NULL;
 247     g_list_free(order);
 248     order = NULL;
 249 }