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     g_message("REORDERING");
  93 }
  94
  95 void focus_set_client(Client *client)
  96 {
  97     Window active;
  98     Client *old;
  99
 100     /* uninstall the old colormap, and install the new one */
 101     screen_install_colormap(focus_client, FALSE);
 102     screen_install_colormap(client, TRUE);
 103
 104     if (client == NULL) {
 105         /* when nothing will be focused, send focus to the backup target */
 106         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
 107                        event_lasttime);
 108         XSync(ob_display, FALSE);
 109     }
 110
 111     old = focus_client;
 112     focus_client = client;
 113
 114     /* move to the top of the list */
 115     if (noreorder)
 116         --noreorder;
 117     else if (client != NULL)
 118         push_to_top(client);
 119
 120     /* set the NET_ACTIVE_WINDOW hint */
 121     active = client ? client->window : None;
 122     PROP_SET32(ob_root, net_active_window, window, active);
 123
 124     if (focus_client != NULL)
 125         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 126     if (old != NULL)
 127         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 128 }
 129
 130 static gboolean focus_under_pointer()
 131 {
 132     Window w;
 133     int i, x, y;
 134     guint u;
 135     GList *it;
 136
 137     if (XQueryPointer(ob_display, ob_root, &w, &w, &x, &y, &i, &i, &u)) {
 138         for (it = stacking_list; it != NULL; it = it->next) {
 139             Client *c = it->data;
 140             if (c->desktop == screen_desktop &&
 141                 RECT_CONTAINS(c->frame->area, x, y))
 142                 break;
 143         }
 144         if (it != NULL)
 145             return client_normal(it->data) && client_focus(it->data);
 146     }
 147     return FALSE;
 148 }
 149
 150 void focus_fallback(gboolean switching_desks)
 151 {
 152     GList *it;
 153     gboolean under = FALSE;
 154     Client *old = NULL;
 155
 156     old = focus_client;
 157
 158     /* unfocus any focused clients.. they can be focused by Pointer events
 159        and such, and then when I try focus them, I won't get a FocusIn event
 160        at all for them.
 161     */
 162     focus_set_client(NULL);
 163
 164     if (switching_desks) {
 165         /* don't skip any windows when switching desktops */
 166         old = NULL;
 167     } else {
 168         if (focus_follow)
 169             under = focus_under_pointer();
 170     }
 171
 172     if (!under) {
 173         for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 174             if (it->data != old && client_normal(it->data))
 175                 if (client_focus(it->data))
 176                     break;
 177         if (it == NULL) /* nothing to focus */
 178             focus_set_client(NULL);
 179     }
 180 }
 181
 182 void focus_cycle(gboolean forward, gboolean linear, gboolean done,
 183                  gboolean cancel)
 184 {
 185     static Client *first = NULL;
 186     static Client *t = NULL;
 187     static GList *order = NULL;
 188     GList *it, *start, *list;
 189     Client *ft;
 190
 191     if (cancel) {
 192         if (first) client_focus(first);
 193         goto done_cycle;
 194     } else if (done) {
 195         if (focus_client) {
 196             push_to_top(focus_client); /* move to top of focus_order */
 197             stacking_raise(focus_client);
 198         }
 199         goto done_cycle;
 200     }
 201     if (!first) first = focus_client;
 202
 203     if (linear) list = client_list;
 204     else        list = focus_order[screen_desktop];
 205
 206     start = it = g_list_find(list, focus_client);
 207     if (!start) goto done_cycle; /* switched desktops or something? */
 208
 209     do {
 210         if (forward) {
 211             it = it->next;
 212             if (it == NULL) it = list;
 213         } else {
 214             it = it->prev;
 215             if (it == NULL) it = g_list_last(list);
 216         }
 217         ft = client_focus_target(it->data);
 218         if (ft == it->data && focus_client != ft && client_focusable(ft)) {
 219             if (client_focus(ft)) {
 220                 noreorder++; /* avoid reordering the focus_order */
 221                 break;
 222             }
 223         }
 224     } while (it != start);
 225     return;
 226
 227 done_cycle:
 228     t = NULL;
 229     first = NULL;
 230     g_list_free(order);
 231     order = NULL;
 232 }