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