browser.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <string.h>
   7
   8 #include <gtk/gtk.h>
   9 #include <gdk/gdkx.h>
  10 #include <gdk/gdkkeysyms.h>
  11 #include <gio/gio.h>
  12 #include <webkit/webkit.h>
  13
  14
  15 static void adblock(WebKitWebView *, WebKitWebFrame *, WebKitWebResource *,
  16                     WebKitNetworkRequest *, WebKitNetworkResponse *, gpointer);
  17 static void adblock_load(void);
  18 static void client_destroy(GtkWidget *, gpointer);
  19 static void client_new(const gchar *uri);
  20 static gboolean client_new_request(WebKitWebView *, WebKitWebFrame *,
  21                                    WebKitNetworkRequest *,
  22                                    WebKitWebNavigationAction *,
  23                                    WebKitWebPolicyDecision *, gpointer);
  24 static void cooperation_setup(void);
  25 static void changed_load_status(GObject *obj, GParamSpec *pspec,
  26                                 gpointer data);
  27 static void changed_title(GObject *, GParamSpec *, gpointer);
  28 static void changed_uri(GObject *, GParamSpec *, gpointer);
  29 static gboolean download_request(WebKitWebView *, WebKitWebFrame *,
  30                                  WebKitNetworkRequest *, gchar *,
  31                                  WebKitWebPolicyDecision *, gpointer);
  32 static gboolean download_wget(WebKitWebView *, WebKitDownload *, gpointer);
  33 static gchar *ensure_url_scheme(const gchar *);
  34 static void grab_environment_configuration(void);
  35 static void hover_web_view(WebKitWebView *, gchar *, gchar *, gpointer);
  36 static gboolean key_location(GtkWidget *, GdkEvent *, gpointer);
  37 static gboolean key_web_view(GtkWidget *, GdkEvent *, gpointer);
  38 static gboolean remote_msg(GIOChannel *, GIOCondition, gpointer);
  39 static void search(gpointer, gint);
  40 static void scroll(GtkAdjustment *, gint, gdouble);
  41 static Window tabbed_launch(void);
  42 static void usage(void);
  43
  44
  45 struct Client
  46 {
  47         GtkWidget *win;
  48         GtkWidget *vbox;
  49         GtkWidget *location;
  50         GtkWidget *status;
  51         GtkWidget *scroll;
  52         GtkWidget *web_view;
  53 };
  54
  55
  56 static gchar *accepted_language = "en-US";
  57 static GSList *adblock_patterns = NULL;
  58 static gint clients = 0;
  59 static gboolean cooperative_alone = TRUE;
  60 static gboolean cooperative_instances = TRUE;
  61 static int cooperative_pipe_fp = 0;
  62 static gchar *download_dir = "/tmp";
  63 static Window embed = 0;
  64 static gchar *first_uri = NULL;
  65 static gdouble global_zoom = 1.0;
  66 static gboolean language_is_set = FALSE;
  67 static gchar *search_text = NULL;
  68 static gboolean show_all_requests = FALSE;
  69 static gboolean tabbed_automagic = TRUE;
  70
  71
  72 void
  73 adblock(WebKitWebView *web_view, WebKitWebFrame *frame,
  74         WebKitWebResource *resource, WebKitNetworkRequest *request,
  75         WebKitNetworkResponse *response, gpointer data)
  76 {
  77         GSList *it = adblock_patterns;
  78         const gchar *uri;
  79
  80         (void)web_view;
  81         (void)frame;
  82         (void)resource;
  83         (void)response;
  84         (void)data;
  85
  86         uri = webkit_network_request_get_uri(request);
  87         if (show_all_requests)
  88                 fprintf(stderr, "-> %s\n", uri);
  89
  90         while (it)
  91         {
  92                 if (g_regex_match((GRegex *)(it->data), uri, 0, NULL))
  93                 {
  94                         webkit_network_request_set_uri(request, "about:blank");
  95                         if (show_all_requests)
  96                                 fprintf(stderr, "\tBLOCKED!\n");
  97                         return;
  98                 }
  99                 it = g_slist_next(it);
 100         }
 101 }
 102
 103 void
 104 adblock_load(void)
 105 {
 106         GRegex *re = NULL;
 107         GError *err = NULL;
 108         GIOChannel *channel = NULL;
 109         gchar *path = NULL;
 110         gchar *buf = NULL;
 111
 112         path = g_build_filename(g_get_user_config_dir(), __NAME__, "adblock.black",
 113                                 NULL);
 114         channel = g_io_channel_new_file(path, "r", &err);
 115         if (channel != NULL)
 116         {
 117                 while (g_io_channel_read_line(channel, &buf, NULL, NULL, NULL)
 118                        == G_IO_STATUS_NORMAL)
 119                 {
 120                         g_strstrip(buf);
 121                         re = g_regex_new(buf,
 122                                          G_REGEX_CASELESS | G_REGEX_OPTIMIZE,
 123                                          G_REGEX_MATCH_PARTIAL, &err);
 124                         if (err != NULL)
 125                         {
 126                                 fprintf(stderr, __NAME__": Could not compile regex: %s\n", buf);
 127                                 g_error_free(err);
 128                                 err = NULL;
 129                         }
 130                         adblock_patterns = g_slist_append(adblock_patterns, re);
 131
 132                         g_free(buf);
 133                 }
 134         }
 135         g_free(path);
 136 }
 137
 138 void
 139 client_destroy(GtkWidget *obj, gpointer data)
 140 {
 141         struct Client *c = (struct Client *)data;
 142
 143         (void)obj;
 144
 145         webkit_web_view_stop_loading(WEBKIT_WEB_VIEW(c->web_view));
 146         gtk_widget_destroy(c->web_view);
 147         gtk_widget_destroy(c->scroll);
 148         gtk_widget_destroy(c->status);
 149         gtk_widget_destroy(c->location);
 150         gtk_widget_destroy(c->vbox);
 151         gtk_widget_destroy(c->win);
 152         free(c);
 153
 154         clients--;
 155         if (clients == 0)
 156                 gtk_main_quit();
 157 }
 158
 159 void
 160 client_new(const gchar *uri)
 161 {
 162         struct Client *c;
 163         gchar *f;
 164
 165         if (cooperative_instances && !cooperative_alone)
 166         {
 167                 write(cooperative_pipe_fp, uri, strlen(uri));
 168                 write(cooperative_pipe_fp, "\n", 1);
 169                 return;
 170         }
 171
 172         c = malloc(sizeof(struct Client));
 173         if (!c)
 174         {
 175                 fprintf(stderr, __NAME__": fatal: malloc failed\n");
 176                 exit(EXIT_FAILURE);
 177         }
 178
 179         c->win = NULL;
 180         if (embed != 0)
 181         {
 182                 c->win = gtk_plug_new(embed);
 183                 if (!gtk_plug_get_embedded(GTK_PLUG(c->win)))
 184                 {
 185                         fprintf(stderr, __NAME__": Can't plug-in to XID %ld.\n", embed);
 186                         gtk_widget_destroy(c->win);
 187                         c->win = NULL;
 188                         embed = 0;
 189                 }
 190         }
 191
 192         if (c->win == NULL)
 193         {
 194                 c->win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 195                 gtk_window_set_wmclass(GTK_WINDOW(c->win), __NAME__, __NAME_CAPITALIZED__);
 196         }
 197
 198         /* When using Gtk2, it only shows a white area when run in suckless'
 199          * tabbed. It appears we need to set a default window size for this
 200          * to work. This is not needed when using Gtk3. */
 201         gtk_window_set_default_size(GTK_WINDOW(c->win), 1024, 768);
 202
 203         g_signal_connect(G_OBJECT(c->win), "destroy",
 204                          G_CALLBACK(client_destroy), c);
 205         gtk_window_set_title(GTK_WINDOW(c->win), __NAME__);
 206
 207         c->web_view = webkit_web_view_new();
 208         webkit_web_view_set_full_content_zoom(WEBKIT_WEB_VIEW(c->web_view), TRUE);
 209         webkit_web_view_set_zoom_level(WEBKIT_WEB_VIEW(c->web_view), global_zoom);
 210         g_signal_connect(G_OBJECT(c->web_view), "notify::title",
 211                          G_CALLBACK(changed_title), c);
 212         g_signal_connect(G_OBJECT(c->web_view), "notify::uri",
 213                          G_CALLBACK(changed_uri), c);
 214         g_signal_connect(G_OBJECT(c->web_view), "notify::load-status",
 215                          G_CALLBACK(changed_load_status), c);
 216         g_signal_connect(G_OBJECT(c->web_view),
 217                          "new-window-policy-decision-requested",
 218                          G_CALLBACK(client_new_request), NULL);
 219         g_signal_connect(G_OBJECT(c->web_view),
 220                          "mime-type-policy-decision-requested",
 221                          G_CALLBACK(download_request), NULL);
 222         g_signal_connect(G_OBJECT(c->web_view), "download-requested",
 223                          G_CALLBACK(download_wget), NULL);
 224         g_signal_connect(G_OBJECT(c->web_view), "key-press-event",
 225                          G_CALLBACK(key_web_view), c);
 226         g_signal_connect(G_OBJECT(c->web_view), "button-release-event",
 227                          G_CALLBACK(key_web_view), c);
 228         g_signal_connect(G_OBJECT(c->web_view), "hovering-over-link",
 229                          G_CALLBACK(hover_web_view), c);
 230         g_signal_connect(G_OBJECT(c->web_view), "resource-request-starting",
 231                          G_CALLBACK(adblock), NULL);
 232
 233         if (!language_is_set)
 234         {
 235                 g_object_set(webkit_get_default_session(), "accept-language",
 236                              accepted_language, NULL);
 237                 language_is_set = TRUE;
 238         }
 239
 240         c->scroll = gtk_scrolled_window_new(NULL, NULL);
 241
 242         gtk_container_add(GTK_CONTAINER(c->scroll), c->web_view);
 243
 244         c->location = gtk_entry_new();
 245         g_signal_connect(G_OBJECT(c->location), "key-press-event",
 246                          G_CALLBACK(key_location), c);
 247
 248         c->status = gtk_statusbar_new();
 249         gtk_statusbar_set_has_resize_grip(GTK_STATUSBAR(c->status), FALSE);
 250
 251         c->vbox = gtk_vbox_new(FALSE, 2);
 252         gtk_box_pack_start(GTK_BOX(c->vbox), c->location, FALSE, FALSE, 0);
 253         gtk_container_add(GTK_CONTAINER(c->vbox), c->scroll);
 254         gtk_box_pack_end(GTK_BOX(c->vbox), c->status, FALSE, FALSE, 0);
 255
 256         gtk_container_add(GTK_CONTAINER(c->win), c->vbox);
 257
 258         gtk_widget_grab_focus(c->web_view);
 259         gtk_widget_show_all(c->win);
 260
 261         f = ensure_url_scheme(uri);
 262         webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), f);
 263         g_free(f);
 264
 265         clients++;
 266 }
 267
 268 gboolean
 269 client_new_request(WebKitWebView *web_view, WebKitWebFrame *frame,
 270                    WebKitNetworkRequest *request,
 271                    WebKitWebNavigationAction *navigation_action,
 272                    WebKitWebPolicyDecision *policy_decision, gpointer user_data)
 273 {
 274         (void)web_view;
 275         (void)frame;
 276         (void)navigation_action;
 277         (void)user_data;
 278
 279         webkit_web_policy_decision_ignore(policy_decision);
 280         client_new(webkit_network_request_get_uri(request));
 281
 282         return TRUE;
 283 }
 284
 285 void
 286 cooperation_setup(void)
 287 {
 288         GIOChannel *towatch;
 289         gchar *fifopath;
 290
 291         fifopath = g_build_filename(g_get_user_runtime_dir(), __NAME__".fifo", NULL);
 292
 293         if (!g_file_test(fifopath, G_FILE_TEST_EXISTS))
 294                 mkfifo(fifopath, 0600);
 295
 296         cooperative_pipe_fp = open(fifopath, O_WRONLY | O_NONBLOCK);
 297         if (!cooperative_pipe_fp)
 298         {
 299                 fprintf(stderr, __NAME__": Can't open FIFO at all.\n");
 300         }
 301         else
 302         {
 303                 if (write(cooperative_pipe_fp, "", 0) == -1)
 304                 {
 305                         /* Could not do an empty write to the FIFO which means there's
 306                          * no one listening. */
 307                         close(cooperative_pipe_fp);
 308                         towatch = g_io_channel_new_file(fifopath, "r+", NULL);
 309                         g_io_add_watch(towatch, G_IO_IN, (GIOFunc)remote_msg, NULL);
 310                 }
 311                 else
 312                         cooperative_alone = FALSE;
 313         }
 314
 315         g_free(fifopath);
 316 }
 317
 318 void
 319 changed_load_status(GObject *obj, GParamSpec *pspec, gpointer data)
 320 {
 321         struct Client *c = (struct Client *)data;
 322
 323         (void)obj;
 324         (void)pspec;
 325
 326         if (webkit_web_view_get_load_status(WEBKIT_WEB_VIEW(c->web_view))
 327             == WEBKIT_LOAD_FINISHED)
 328         {
 329                 gtk_statusbar_pop(GTK_STATUSBAR(c->status), 1);
 330                 gtk_statusbar_push(GTK_STATUSBAR(c->status), 1, "Finished.");
 331         }
 332         else
 333         {
 334                 gtk_statusbar_pop(GTK_STATUSBAR(c->status), 1);
 335                 gtk_statusbar_push(GTK_STATUSBAR(c->status), 1, "Loading...");
 336         }
 337 }
 338
 339 void
 340 changed_title(GObject *obj, GParamSpec *pspec, gpointer data)
 341 {
 342         const gchar *t;
 343         struct Client *c = (struct Client *)data;
 344
 345         (void)obj;
 346         (void)pspec;
 347
 348         t = webkit_web_view_get_title(WEBKIT_WEB_VIEW(c->web_view));
 349         gtk_window_set_title(GTK_WINDOW(c->win), (t == NULL ? __NAME__ : t));
 350 }
 351
 352 void
 353 changed_uri(GObject *obj, GParamSpec *pspec, gpointer data)
 354 {
 355         const gchar *t;
 356         struct Client *c = (struct Client *)data;
 357
 358         (void)obj;
 359         (void)pspec;
 360
 361         t = webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view));
 362         gtk_entry_set_text(GTK_ENTRY(c->location), (t == NULL ? __NAME__ : t));
 363 }
 364
 365 gboolean
 366 download_request(WebKitWebView *web_view, WebKitWebFrame *frame,
 367                  WebKitNetworkRequest *request, gchar *mime_type,
 368                  WebKitWebPolicyDecision *policy_decision, gpointer data)
 369 {
 370         (void)frame;
 371         (void)request;
 372         (void)data;
 373
 374         if (!webkit_web_view_can_show_mime_type(web_view, mime_type))
 375         {
 376                 webkit_web_policy_decision_download(policy_decision);
 377                 return TRUE;
 378         }
 379         return FALSE;
 380 }
 381
 382 gboolean
 383 download_wget(WebKitWebView *web_view, WebKitDownload *download, gpointer data)
 384 {
 385         const gchar *uri;
 386         char id[16] = "";
 387         gint ret;
 388
 389         (void)web_view;
 390         (void)data;
 391
 392         uri = webkit_download_get_uri(download);
 393         if (fork() == 0)
 394         {
 395                 chdir(download_dir);
 396                 if (embed == 0)
 397                         ret = execlp("xterm", "xterm", "-hold", "-e", "wget", uri, NULL);
 398                 else
 399                 {
 400                         if (snprintf(id, 16, "%ld", embed) >= 16)
 401                         {
 402                                 fprintf(stderr, __NAME__": id for xterm embed truncated!\n");
 403                                 exit(EXIT_FAILURE);
 404                         }
 405                         ret = execlp("xterm", "xterm", "-hold", "-into", id, "-e", "wget",
 406                                      uri, NULL);
 407                 }
 408
 409                 if (ret == -1)
 410                 {
 411                         fprintf(stderr, __NAME__": exec'ing xterm for download");
 412                         perror(" failed");
 413                         exit(EXIT_FAILURE);
 414                 }
 415         }
 416
 417         return FALSE;
 418 }
 419
 420 gchar *
 421 ensure_url_scheme(const gchar *t)
 422 {
 423         gchar *f;
 424
 425         f = g_ascii_strdown(t, -1);
 426         if (!g_str_has_prefix(f, "http:") &&
 427                 !g_str_has_prefix(f, "https:") &&
 428                 !g_str_has_prefix(f, "file:") &&
 429                 !g_str_has_prefix(f, "about:"))
 430         {
 431                 g_free(f);
 432                 f = g_strdup_printf("http://%s", t);
 433                 return f;
 434         }
 435         else
 436                 return g_strdup(t);
 437 }
 438
 439 void
 440 grab_environment_configuration(void)
 441 {
 442         const gchar *e;
 443
 444         e = g_getenv(__NAME_UPPERCASE__"_ACCEPTED_LANGUAGE");
 445         if (e != NULL)
 446         {
 447                 accepted_language = g_strdup(e);
 448         }
 449
 450         e = g_getenv(__NAME_UPPERCASE__"_DOWNLOAD_DIR");
 451         if (e != NULL)
 452         {
 453                 download_dir = g_strdup(e);
 454         }
 455
 456         e = g_getenv(__NAME_UPPERCASE__"_ZOOM");
 457         if (e != NULL)
 458         {
 459                 global_zoom = atof(e);
 460         }
 461 }
 462
 463 void
 464 hover_web_view(WebKitWebView *web_view, gchar *title, gchar *uri,
 465                    gpointer data)
 466 {
 467         struct Client *c = (struct Client *)data;
 468
 469         (void)web_view;
 470         (void)title;
 471
 472         gtk_statusbar_pop(GTK_STATUSBAR(c->status), 0);
 473         if (uri != NULL)
 474                 gtk_statusbar_push(GTK_STATUSBAR(c->status), 0, uri);
 475 }
 476
 477 gboolean
 478 key_location(GtkWidget *widget, GdkEvent *event, gpointer data)
 479 {
 480         struct Client *c = (struct Client *)data;
 481         const gchar *t;
 482         gchar *f;
 483
 484         (void)widget;
 485
 486         if (event->type == GDK_KEY_PRESS)
 487         {
 488                 switch (((GdkEventKey *)event)->keyval)
 489                 {
 490                         case GDK_KEY_Return:
 491                                 gtk_widget_grab_focus(c->web_view);
 492                                 t = gtk_entry_get_text(GTK_ENTRY(c->location));
 493                                 if (t != NULL && t[0] == '/')
 494                                 {
 495                                         if (search_text != NULL)
 496                                                 g_free(search_text);
 497                                         search_text = g_strdup(t + 1);  /* XXX whacky */
 498                                         search(c, 1);
 499                                 }
 500                                 else
 501                                 {
 502                                         f = ensure_url_scheme(t);
 503                                         webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), f);
 504                                         g_free(f);
 505                                 }
 506                                 return TRUE;
 507                         case GDK_KEY_Escape:
 508                                 t = webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view));
 509                                 gtk_entry_set_text(GTK_ENTRY(c->location),
 510                                                    (t == NULL ? __NAME__ : t));
 511                                 return TRUE;
 512                 }
 513         }
 514
 515         return FALSE;
 516 }
 517
 518 gboolean
 519 key_web_view(GtkWidget *widget, GdkEvent *event, gpointer data)
 520 {
 521         struct Client *c = (struct Client *)data;
 522         WebKitHitTestResultContext ht_context;
 523         WebKitHitTestResult *ht_result = NULL;
 524         char *ht_uri =  NULL;
 525
 526         (void)widget;
 527
 528         if (event->type == GDK_KEY_PRESS)
 529         {
 530                 if (((GdkEventKey *)event)->state & GDK_CONTROL_MASK)
 531                 {
 532                         switch (((GdkEventKey *)event)->keyval)
 533                         {
 534                                 case GDK_KEY_o:
 535                                         gtk_widget_grab_focus(c->location);
 536                                         return TRUE;
 537                                 case GDK_KEY_h:
 538                                         scroll(gtk_scrolled_window_get_hadjustment(
 539                                                GTK_SCROLLED_WINDOW(c->scroll)), 0, -1);
 540                                         return TRUE;
 541                                 case GDK_KEY_j:
 542                                         scroll(gtk_scrolled_window_get_vadjustment(
 543                                                GTK_SCROLLED_WINDOW(c->scroll)), 0, 1);
 544                                         return TRUE;
 545                                 case GDK_KEY_k:
 546                                         scroll(gtk_scrolled_window_get_vadjustment(
 547                                                GTK_SCROLLED_WINDOW(c->scroll)), 0, -1);
 548                                         return TRUE;
 549                                 case GDK_KEY_l:
 550                                         scroll(gtk_scrolled_window_get_hadjustment(
 551                                                GTK_SCROLLED_WINDOW(c->scroll)), 0, 1);
 552                                         return TRUE;
 553                                 case GDK_KEY_f:
 554                                         scroll(gtk_scrolled_window_get_vadjustment(
 555                                                GTK_SCROLLED_WINDOW(c->scroll)), 1, 0.5);
 556                                         return TRUE;
 557                                 case GDK_KEY_b:
 558                                         scroll(gtk_scrolled_window_get_vadjustment(
 559                                                GTK_SCROLLED_WINDOW(c->scroll)), 1, -0.5);
 560                                         return TRUE;
 561                                 case GDK_KEY_n:
 562                                         search(c, 1);
 563                                         return TRUE;
 564                                 case GDK_KEY_p:
 565                                         search(c, -1);
 566                                         return TRUE;
 567                                 case GDK_KEY_g:
 568                                         webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view),
 569                                                                  first_uri);
 570                                         return TRUE;
 571                         }
 572                 }
 573                 else if (((GdkEventKey *)event)->keyval == GDK_KEY_Escape)
 574                 {
 575                         webkit_web_view_stop_loading(WEBKIT_WEB_VIEW(c->web_view));
 576                         gtk_statusbar_pop(GTK_STATUSBAR(c->status), 1);
 577                         gtk_statusbar_push(GTK_STATUSBAR(c->status), 1, "Aborted.");
 578                 }
 579         }
 580         else if (event->type == GDK_BUTTON_RELEASE)
 581         {
 582                 switch (((GdkEventButton *)event)->button)
 583                 {
 584                         case 2:
 585                                 ht_result = webkit_web_view_get_hit_test_result(
 586                                                                    WEBKIT_WEB_VIEW(c->web_view),
 587                                                                        (GdkEventButton *)event);
 588                                 g_object_get(ht_result, "context", &ht_context, NULL);
 589                                 if (ht_context & WEBKIT_HIT_TEST_RESULT_CONTEXT_LINK)
 590                                 {
 591                                         g_object_get(ht_result, "link-uri", &ht_uri, NULL);
 592                                         client_new(ht_uri);
 593                                         g_object_unref(ht_result);
 594                                         return TRUE;
 595                                 }
 596                                 g_object_unref(ht_result);
 597                                 return FALSE;
 598                         case 8:
 599                                 webkit_web_view_go_back(WEBKIT_WEB_VIEW(c->web_view));
 600                                 return TRUE;
 601                         case 9:
 602                                 webkit_web_view_go_forward(WEBKIT_WEB_VIEW(c->web_view));
 603                                 return TRUE;
 604                 }
 605         }
 606
 607         return FALSE;
 608 }
 609
 610 gboolean
 611 remote_msg(GIOChannel *channel, GIOCondition condition, gpointer data)
 612 {
 613         gchar *uri = NULL;
 614
 615         (void)condition;
 616         (void)data;
 617
 618         g_io_channel_read_line(channel, &uri, NULL, NULL, NULL);
 619         if (uri)
 620         {
 621                 g_strstrip(uri);
 622                 client_new(uri);
 623                 g_free(uri);
 624         }
 625         return TRUE;
 626 }
 627
 628 void
 629 search(gpointer data, gint direction)
 630 {
 631         struct Client *c = (struct Client *)data;
 632
 633         if (search_text == NULL)
 634                 return;
 635
 636         webkit_web_view_search_text(WEBKIT_WEB_VIEW(c->web_view), search_text,
 637                                     FALSE, direction == 1, TRUE);
 638 }
 639
 640 void
 641 scroll(GtkAdjustment *a, gint step_type, gdouble factor)
 642 {
 643         gdouble new, lower, upper, step;
 644         lower = gtk_adjustment_get_lower(a);
 645         upper = gtk_adjustment_get_upper(a) - gtk_adjustment_get_page_size(a) + lower;
 646         if (step_type == 0)
 647                 step = gtk_adjustment_get_step_increment(a);
 648         else
 649                 step = gtk_adjustment_get_page_increment(a);
 650         new = gtk_adjustment_get_value(a) + factor * step;
 651         new = new < lower ? lower : new;
 652         new = new > upper ? upper : new;
 653         gtk_adjustment_set_value(a, new);
 654 }
 655
 656 Window
 657 tabbed_launch(void)
 658 {
 659         gint tabbed_stdout;
 660         GIOChannel *tabbed_stdout_channel;
 661         GError *err = NULL;
 662         gchar *output = NULL;
 663         char *argv[] = { "tabbed", "-c", "-d", "-p", "s1", "-n", __NAME__, NULL };
 664         Window plug_into;
 665
 666         if (!g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL,
 667                                       NULL, NULL, NULL, &tabbed_stdout, NULL,
 668                                       &err))
 669         {
 670                 fprintf(stderr, __NAME__": Could not launch tabbed: %s\n", err->message);
 671                 g_error_free(err);
 672                 return 0;
 673         }
 674
 675         tabbed_stdout_channel = g_io_channel_unix_new(tabbed_stdout);
 676         g_io_channel_read_line(tabbed_stdout_channel, &output, NULL, NULL, NULL);
 677         if (output == NULL)
 678         {
 679                 fprintf(stderr, __NAME__": Could not read XID from tabbed\n");
 680                 return 0;
 681         }
 682
 683         g_io_channel_shutdown(tabbed_stdout_channel, FALSE, NULL);
 684
 685         g_strstrip(output);
 686         plug_into = strtol(output, NULL, 16);
 687         g_free(output);
 688         return plug_into;
 689 }
 690
 691 void
 692 usage(void)
 693 {
 694         fprintf(stderr, "Usage: "__NAME__" [OPTION]... <URI>...\n");
 695         exit(EXIT_FAILURE);
 696 }
 697
 698
 699 int
 700 main(int argc, char **argv)
 701 {
 702         int opt, i;
 703
 704         gtk_init(&argc, &argv);
 705
 706         grab_environment_configuration();
 707
 708         while ((opt = getopt(argc, argv, "e:rCT")) != -1)
 709         {
 710                 switch (opt)
 711                 {
 712                         case 'e':
 713                                 embed = atol(optarg);
 714                                 tabbed_automagic = FALSE;
 715                                 break;
 716                         case 'r':
 717                                 show_all_requests = TRUE;
 718                                 break;
 719                         case 'C':
 720                                 cooperative_instances = FALSE;
 721                                 break;
 722                         case 'T':
 723                                 tabbed_automagic = FALSE;
 724                                 break;
 725                         default:
 726                                 usage();
 727                 }
 728         }
 729
 730         if (optind >= argc)
 731                 usage();
 732
 733         adblock_load();
 734         cooperation_setup();
 735
 736         if (tabbed_automagic && !(cooperative_instances && !cooperative_alone))
 737                 embed = tabbed_launch();
 738
 739         first_uri = g_strdup(argv[optind]);
 740         for (i = optind; i < argc; i++)
 741                 client_new(argv[i]);
 742         if (!cooperative_instances || cooperative_alone)
 743                 gtk_main();
 744         exit(EXIT_SUCCESS);
 745 }