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 int focus_ignore_in = 0;
  22
  23 static void parse_assign(char *name, ParseToken *value)
  24 {
  25     if (!g_ascii_strcasecmp(name, "focusnew")) {
  26         if (value->type != TOKEN_BOOL)
  27             yyerror("invalid value");
  28         else {
  29             focus_new = value->data.bool;
  30         }
  31     } else if (!g_ascii_strcasecmp(name, "followmouse")) {
  32         if (value->type != TOKEN_BOOL)
  33             yyerror("invalid value");
  34         else {
  35             focus_follow = value->data.bool;
  36         }
  37     } else
  38         yyerror("invalid option");
  39     parse_free_token(value);
  40 }
  41
  42 void focus_startup()
  43 {
  44     /* create the window which gets focus when no clients get it. Have to
  45        make it override-redirect so we don't try manage it, since it is
  46        mapped. */
  47     XSetWindowAttributes attrib;
  48
  49     focus_client = NULL;
  50     focus_new = TRUE;
  51     focus_follow = TRUE;
  52
  53     attrib.override_redirect = TRUE;
  54     focus_backup = XCreateWindow(ob_display, ob_root,
  55                                  -100, -100, 1, 1, 0,
  56                                  CopyFromParent, InputOutput, CopyFromParent,
  57                                  CWOverrideRedirect, &attrib);
  58     XMapRaised(ob_display, focus_backup);
  59
  60     /* start with nothing focused */
  61     focus_set_client(NULL);
  62
  63     parse_reg_section("focus", NULL, parse_assign);
  64 }
  65
  66 void focus_shutdown()
  67 {
  68     guint i;
  69
  70     for (i = 0; i < screen_num_desktops; ++i)
  71         g_list_free(focus_order[i]);
  72     g_free(focus_order);
  73     focus_order = NULL;
  74
  75     XDestroyWindow(ob_display, focus_backup);
  76
  77     /* reset focus to root */
  78     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  79                    event_lasttime);
  80 }
  81
  82 void focus_set_client(Client *client)
  83 {
  84     Window active;
  85     Client *old;
  86     guint desktop;
  87
  88     /* uninstall the old colormap, and install the new one */
  89     screen_install_colormap(focus_client, FALSE);
  90     screen_install_colormap(client, TRUE);
  91
  92     if (client == NULL) {
  93         /* when nothing will be focused, send focus to the backup target */
  94         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  95                        event_lasttime);
  96         XSync(ob_display, FALSE);
  97     }
  98
  99     old = focus_client;
 100     focus_client = client;
 101
 102     /* move to the top of the list */
 103     if (focus_ignore_in) {
 104         g_assert(focus_ignore_in > 0);
 105         --focus_ignore_in;
 106     } else if (client != NULL) {
 107         desktop = client->desktop;
 108         if (desktop == DESKTOP_ALL) desktop = screen_desktop;
 109         focus_order[desktop] = g_list_remove(focus_order[desktop], client);
 110         focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
 111     }
 112
 113     /* set the NET_ACTIVE_WINDOW hint */
 114     active = client ? client->window : None;
 115     PROP_SET32(ob_root, net_active_window, window, active);
 116
 117     if (focus_client != NULL)
 118         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 119     if (old != NULL)
 120         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 121 }
 122
 123 static gboolean focus_under_pointer()
 124 {
 125     Window w;
 126     int i, x, y;
 127     guint u;
 128     GList *it;
 129
 130     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 131         for (it = stacking_list; it != NULL; it = it->next) {
 132             Client *c = it->data;
 133             if (c->desktop == screen_desktop &&
 134                 RECT_CONTAINS(c->frame->area, x, y))
 135                 break;
 136         }
 137         if (it != NULL)
 138             return client_normal(it->data) && client_focus(it->data);
 139     }
 140     return FALSE;
 141 }
 142
 143 void focus_fallback(gboolean switching_desks)
 144 {
 145     GList *it;
 146     gboolean under = FALSE;
 147     Client *old = NULL;
 148
 149     old = focus_client;
 150
 151     /* unfocus any focused clients.. they can be focused by Pointer events
 152        and such, and then when I try focus them, I won't get a FocusIn event
 153        at all for them.
 154     */
 155     focus_set_client(NULL);
 156
 157     if (switching_desks) {
 158         /* don't skip any windows when switching desktops */
 159         old = NULL;
 160     } else {
 161         if (focus_follow)
 162             under = focus_under_pointer();
 163     }
 164
 165     if (!under) {
 166         for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 167             if (it->data != old && client_normal(it->data))
 168                 if (client_focus(it->data))
 169                     break;
 170         if (it == NULL) /* nothing to focus */
 171             focus_set_client(NULL);
 172     }
 173 }