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
  11 #include <X11/Xlib.h>
  12 #include <glib.h>
  13
  14 Client *focus_client = NULL;
  15 GList **focus_order = NULL; /* these lists are created when screen_startup
  16                                sets the number of desktops */
  17
  18 Window focus_backup = None;
  19 gboolean focus_new = TRUE;
  20 gboolean focus_follow = TRUE;
  21
  22 static void parse_assign(char *name, ParseToken *value)
  23 {
  24     if (!g_ascii_strcasecmp(name, "focusnew")) {
  25         if (value->type != TOKEN_BOOL)
  26             yyerror("invalid value");
  27         else {
  28             focus_new = value->data.bool;
  29         }
  30     } else if (!g_ascii_strcasecmp(name, "followmouse")) {
  31         if (value->type != TOKEN_BOOL)
  32             yyerror("invalid value");
  33         else {
  34             focus_follow = value->data.bool;
  35         }
  36     } else
  37         yyerror("invalid option");
  38     parse_free_token(value);
  39 }
  40
  41 void focus_startup()
  42 {
  43     /* create the window which gets focus when no clients get it. Have to
  44        make it override-redirect so we don't try manage it, since it is
  45        mapped. */
  46     XSetWindowAttributes attrib;
  47
  48     focus_client = NULL;
  49     focus_new = TRUE;
  50     focus_follow = TRUE;
  51
  52     attrib.override_redirect = TRUE;
  53     focus_backup = XCreateWindow(ob_display, ob_root,
  54                                  -100, -100, 1, 1, 0,
  55                                  CopyFromParent, InputOutput, CopyFromParent,
  56                                  CWOverrideRedirect, &attrib);
  57     XMapRaised(ob_display, focus_backup);
  58
  59     /* start with nothing focused */
  60     focus_set_client(NULL);
  61
  62     parse_reg_section("focus", NULL, parse_assign);
  63 }
  64
  65 void focus_shutdown()
  66 {
  67     guint i;
  68
  69     for (i = 0; i < screen_num_desktops; ++i)
  70         g_list_free(focus_order[i]);
  71     g_free(focus_order);
  72     focus_order = NULL;
  73
  74     XDestroyWindow(ob_display, focus_backup);
  75
  76     /* reset focus to root */
  77     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  78                    event_lasttime);
  79 }
  80
  81 void focus_set_client(Client *client)
  82 {
  83     Window active;
  84     Client *old;
  85     guint desktop;
  86
  87     /* uninstall the old colormap, and install the new one */
  88     screen_install_colormap(focus_client, FALSE);
  89     screen_install_colormap(client, TRUE);
  90
  91     if (client == NULL) {
  92         /* when nothing will be focused, send focus to the backup target */
  93         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  94                        event_lasttime);
  95         XSync(ob_display, FALSE);
  96     }
  97
  98     old = focus_client;
  99     focus_client = client;
 100
 101     /* move to the top of the list */
 102     if (client != NULL) {
 103         desktop = client->desktop;
 104         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
 105         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
 106         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
 107     }
 108
 109     /* set the NET_ACTIVE_WINDOW hint */
 110     active = client ? client->window : None;
 111     PROP_SET32(ob_root, net_active_window, window, active);
 112
 113     if (focus_client != NULL)
 114         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 115     if (old != NULL)
 116         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 117 }
 118
 119 static gboolean focus_under_pointer()
 120 {
 121     Window w;
 122     int i, x, y;
 123     guint u;
 124     GList *it;
 125
 126     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 127         for (it = stacking_list; it != NULL; it = it->next) {
 128             Client *c = it->data;
 129             if (c->desktop == screen_desktop &&
 130                 RECT_CONTAINS(c->frame->area, x, y))
 131                 break;
 132         }
 133         if (it != NULL)
 134             return client_normal(it->data) && client_focus(it->data);
 135     }
 136     return FALSE;
 137 }
 138
 139 void focus_fallback(gboolean switching_desks)
 140 {
 141     GList *it;
 142     gboolean under = FALSE;
 143     Client *old = NULL;
 144
 145     old = focus_client;
 146
 147     /* unfocus any focused clients.. they can be focused by Pointer events
 148        and such, and then when I try focus them, I won't get a FocusIn event
 149        at all for them.
 150     */
 151     focus_set_client(NULL);
 152
 153     if (switching_desks) {
 154         /* don't skip any windows when switching desktops */
 155         old = NULL;
 156     } else {
 157         if (focus_follow)
 158             under = focus_under_pointer();
 159     }
 160
 161     if (!under) {
 162         for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 163             if (it->data != old && client_normal(it->data))
 164                 if (client_focus(it->data))
 165                     break;
 166         if (it == NULL) /* nothing to focus */
 167             focus_set_client(NULL);
 168     }
 169 }