browser.c

   1 #include <limits.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include <fcntl.h>
   7 #include <string.h>
   8
   9 #include <gtk/gtk.h>
  10 #include <gtk/gtkx.h>
  11 #include <gdk/gdkkeysyms.h>
  12 #include <gio/gio.h>
  13 #include <webkit2/webkit2.h>
  14 #include <JavaScriptCore/JavaScript.h>
  15
  16
  17 static void client_destroy(GtkWidget *, gpointer);
  18 static gboolean client_destroy_request(WebKitWebView *, gpointer);
  19 static WebKitWebView *client_new(const gchar *, WebKitWebView *, gboolean);
  20 static WebKitWebView *client_new_request(WebKitWebView *, WebKitNavigationAction *,
  21                                          gpointer);
  22 static void cooperation_setup(void);
  23 static void changed_download_progress(GObject *, GParamSpec *, gpointer);
  24 static void changed_load_progress(GObject *, GParamSpec *, gpointer);
  25 static void changed_title(GObject *, GParamSpec *, gpointer);
  26 static void changed_uri(GObject *, GParamSpec *, gpointer);
  27 static gboolean crashed_web_view(WebKitWebView *, gpointer);
  28 static gboolean decide_policy(WebKitWebView *, WebKitPolicyDecision *,
  29                               WebKitPolicyDecisionType, gpointer);
  30 static gboolean download_handle(WebKitDownload *, gchar *, gpointer);
  31 static void download_handle_start(WebKitWebView *, WebKitDownload *, gpointer);
  32 static void downloadmanager_cancel(GtkToolButton *, gpointer);
  33 static gboolean downloadmanager_delete(GtkWidget *, gpointer);
  34 static void downloadmanager_setup(void);
  35 static gchar *ensure_uri_scheme(const gchar *);
  36 static void external_handler_run(GSimpleAction *, GVariant *, gpointer);
  37 static void grab_environment_configuration(void);
  38 static void grab_feeds_finished(GObject *, GAsyncResult *, gpointer);
  39 static void hover_web_view(WebKitWebView *, WebKitHitTestResult *, guint, gpointer);
  40 static void icon_location(GtkEntry *, GtkEntryIconPosition, GdkEvent *, gpointer);
  41 static gboolean key_common(GtkWidget *, GdkEvent *, gpointer);
  42 static gboolean key_downloadmanager(GtkWidget *, GdkEvent *, gpointer);
  43 static gboolean key_location(GtkWidget *, GdkEvent *, gpointer);
  44 static gboolean key_web_view(GtkWidget *, GdkEvent *, gpointer);
  45 static void keywords_load(void);
  46 static gboolean keywords_try_search(WebKitWebView *, const gchar *);
  47 static gboolean menu_web_view(WebKitWebView *, WebKitContextMenu *, GdkEvent *,
  48                               WebKitHitTestResult *, gpointer);
  49 static gboolean quit_if_nothing_active(void);
  50 static gboolean remote_msg(GIOChannel *, GIOCondition, gpointer);
  51 static void run_user_scripts(WebKitWebView *);
  52 static void search(gpointer, gint);
  53 static void show_web_view(WebKitWebView *, gpointer);
  54 static void trust_user_certs(WebKitWebContext *);
  55
  56
  57 struct Client
  58 {
  59     gchar *external_handler_uri;
  60     gchar *hover_uri;
  61     gchar *feed_html;
  62     GtkWidget *location;
  63     GtkWidget *vbox;
  64     GtkWidget *web_view;
  65     GtkWidget *win;
  66 };
  67
  68 struct DownloadManager
  69 {
  70     GtkWidget *scroll;
  71     GtkWidget *toolbar;
  72     GtkWidget *win;
  73 } dm;
  74
  75
  76 static const gchar *accepted_language[2] = { NULL, NULL };
  77 static gint clients = 0, downloads = 0;
  78 static gboolean cooperative_alone = TRUE;
  79 static gboolean cooperative_instances = TRUE;
  80 static int cooperative_pipe_fp = 0;
  81 static gchar *download_dir = "/var/tmp";
  82 static gboolean enable_console_to_stdout = FALSE;
  83 static gchar *fifo_suffix = "main";
  84 static gdouble global_zoom = 1.0;
  85 static gchar *history_file = NULL;
  86 static gchar *home_uri = "about:blank";
  87 static gboolean initial_wc_setup_done = FALSE;
  88 static GHashTable *keywords = NULL;
  89 static gchar *search_text = NULL;
  90 static gchar *user_agent = NULL;
  91
  92
  93 void
  94 client_destroy(GtkWidget *widget, gpointer data)
  95 {
  96     struct Client *c = (struct Client *)data;
  97
  98     g_signal_handlers_disconnect_by_func(G_OBJECT(c->web_view),
  99                                          changed_load_progress, c);
 100
 101     free(c);
 102     clients--;
 103
 104     quit_if_nothing_active();
 105 }
 106
 107 gboolean
 108 client_destroy_request(WebKitWebView *web_view, gpointer data)
 109 {
 110     struct Client *c = (struct Client *)data;
 111
 112     gtk_widget_destroy(c->win);
 113
 114     return TRUE;
 115 }
 116
 117 WebKitWebView *
 118 client_new(const gchar *uri, WebKitWebView *related_wv, gboolean show)
 119 {
 120     struct Client *c;
 121     WebKitWebContext *wc;
 122     gchar *f;
 123
 124     if (uri != NULL && cooperative_instances && !cooperative_alone)
 125     {
 126         f = ensure_uri_scheme(uri);
 127         write(cooperative_pipe_fp, f, strlen(f));
 128         write(cooperative_pipe_fp, "\n", 1);
 129         g_free(f);
 130         return NULL;
 131     }
 132
 133     c = calloc(1, sizeof(struct Client));
 134     if (!c)
 135     {
 136         fprintf(stderr, __NAME__": fatal: calloc failed\n");
 137         exit(EXIT_FAILURE);
 138     }
 139
 140     if (c->win == NULL)
 141         c->win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 142
 143     gtk_window_set_default_size(GTK_WINDOW(c->win), 800, 600);
 144
 145     g_signal_connect(G_OBJECT(c->win), "destroy", G_CALLBACK(client_destroy), c);
 146     gtk_window_set_title(GTK_WINDOW(c->win), __NAME__);
 147
 148     if (related_wv == NULL)
 149         c->web_view = webkit_web_view_new();
 150     else
 151         c->web_view = webkit_web_view_new_with_related_view(related_wv);
 152     wc = webkit_web_view_get_context(WEBKIT_WEB_VIEW(c->web_view));
 153
 154     webkit_web_view_set_zoom_level(WEBKIT_WEB_VIEW(c->web_view), global_zoom);
 155     g_signal_connect(G_OBJECT(c->web_view), "notify::title",
 156                      G_CALLBACK(changed_title), c);
 157     g_signal_connect(G_OBJECT(c->web_view), "notify::uri",
 158                      G_CALLBACK(changed_uri), c);
 159     g_signal_connect(G_OBJECT(c->web_view), "notify::estimated-load-progress",
 160                      G_CALLBACK(changed_load_progress), c);
 161     g_signal_connect(G_OBJECT(c->web_view), "create",
 162                      G_CALLBACK(client_new_request), NULL);
 163     g_signal_connect(G_OBJECT(c->web_view), "context-menu",
 164                      G_CALLBACK(menu_web_view), c);
 165     g_signal_connect(G_OBJECT(c->web_view), "close",
 166                      G_CALLBACK(client_destroy_request), c);
 167     g_signal_connect(G_OBJECT(c->web_view), "decide-policy",
 168                      G_CALLBACK(decide_policy), NULL);
 169     g_signal_connect(G_OBJECT(c->web_view), "key-press-event",
 170                      G_CALLBACK(key_web_view), c);
 171     g_signal_connect(G_OBJECT(c->web_view), "button-release-event",
 172                      G_CALLBACK(key_web_view), c);
 173     g_signal_connect(G_OBJECT(c->web_view), "scroll-event",
 174                      G_CALLBACK(key_web_view), c);
 175     g_signal_connect(G_OBJECT(c->web_view), "mouse-target-changed",
 176                      G_CALLBACK(hover_web_view), c);
 177     g_signal_connect(G_OBJECT(c->web_view), "web-process-crashed",
 178                      G_CALLBACK(crashed_web_view), c);
 179
 180     if (!initial_wc_setup_done)
 181     {
 182         if (accepted_language[0] != NULL)
 183             webkit_web_context_set_preferred_languages(wc, accepted_language);
 184
 185         g_signal_connect(G_OBJECT(wc), "download-started",
 186                          G_CALLBACK(download_handle_start), NULL);
 187
 188         trust_user_certs(wc);
 189
 190         initial_wc_setup_done = TRUE;
 191     }
 192
 193     if (user_agent != NULL)
 194         g_object_set(G_OBJECT(webkit_web_view_get_settings(WEBKIT_WEB_VIEW(c->web_view))),
 195                      "user-agent", user_agent, NULL);
 196
 197     if (enable_console_to_stdout)
 198         webkit_settings_set_enable_write_console_messages_to_stdout(webkit_web_view_get_settings(WEBKIT_WEB_VIEW(c->web_view)), TRUE);
 199
 200     webkit_settings_set_enable_developer_extras(webkit_web_view_get_settings(WEBKIT_WEB_VIEW(c->web_view)), TRUE);
 201
 202     c->location = gtk_entry_new();
 203     g_signal_connect(G_OBJECT(c->location), "key-press-event",
 204                      G_CALLBACK(key_location), c);
 205     g_signal_connect(G_OBJECT(c->location), "icon-release",
 206                      G_CALLBACK(icon_location), c);
 207     /* XXX This is a workaround. Setting this to NULL (which is done in
 208      * grab_feeds_finished() if no feed has been detected) adds a little
 209      * padding left of the text. Not sure why. The point of this call
 210      * right here is to have that padding right from the start. This
 211      * avoids a graphical artifact. */
 212     gtk_entry_set_icon_from_icon_name(GTK_ENTRY(c->location),
 213                                       GTK_ENTRY_ICON_PRIMARY,
 214                                       NULL);
 215
 216     c->vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
 217     gtk_box_pack_start(GTK_BOX(c->vbox), c->location, FALSE, FALSE, 0);
 218     gtk_box_pack_start(GTK_BOX(c->vbox), c->web_view, TRUE, TRUE, 0);
 219
 220     gtk_container_add(GTK_CONTAINER(c->win), c->vbox);
 221
 222     if (show)
 223         show_web_view(NULL, c);
 224     else
 225         g_signal_connect(G_OBJECT(c->web_view), "ready-to-show",
 226                          G_CALLBACK(show_web_view), c);
 227
 228     if (uri != NULL)
 229     {
 230         f = ensure_uri_scheme(uri);
 231         webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), f);
 232         g_free(f);
 233     }
 234
 235     clients++;
 236
 237     return WEBKIT_WEB_VIEW(c->web_view);
 238 }
 239
 240 WebKitWebView *
 241 client_new_request(WebKitWebView *web_view,
 242                    WebKitNavigationAction *navigation_action, gpointer data)
 243 {
 244     return client_new(NULL, web_view, FALSE);
 245 }
 246
 247 void
 248 cooperation_setup(void)
 249 {
 250     GIOChannel *towatch;
 251     gchar *fifofilename, *fifopath;
 252
 253     fifofilename = g_strdup_printf("%s-%s", __NAME__".fifo", fifo_suffix);
 254     fifopath = g_build_filename(g_get_user_runtime_dir(), fifofilename, NULL);
 255     g_free(fifofilename);
 256
 257     if (!g_file_test(fifopath, G_FILE_TEST_EXISTS))
 258         mkfifo(fifopath, 0600);
 259
 260     cooperative_pipe_fp = open(fifopath, O_WRONLY | O_NONBLOCK);
 261     if (!cooperative_pipe_fp)
 262     {
 263         fprintf(stderr, __NAME__": Can't open FIFO at all.\n");
 264     }
 265     else
 266     {
 267         if (write(cooperative_pipe_fp, "", 0) == -1)
 268         {
 269             /* Could not do an empty write to the FIFO which means there's
 270              * no one listening. */
 271             close(cooperative_pipe_fp);
 272             towatch = g_io_channel_new_file(fifopath, "r+", NULL);
 273             g_io_add_watch(towatch, G_IO_IN, (GIOFunc)remote_msg, NULL);
 274         }
 275         else
 276             cooperative_alone = FALSE;
 277     }
 278
 279     g_free(fifopath);
 280 }
 281
 282 void
 283 changed_download_progress(GObject *obj, GParamSpec *pspec, gpointer data)
 284 {
 285     WebKitDownload *download = WEBKIT_DOWNLOAD(obj);
 286     WebKitURIResponse *resp;
 287     GtkToolItem *tb = GTK_TOOL_ITEM(data);
 288     gdouble p, size_mb;
 289     const gchar *uri;
 290     gchar *t, *filename, *base;
 291
 292     p = webkit_download_get_estimated_progress(download);
 293     p = p > 1 ? 1 : p;
 294     p = p < 0 ? 0 : p;
 295     p *= 100;
 296     resp = webkit_download_get_response(download);
 297     size_mb = webkit_uri_response_get_content_length(resp) / 1e6;
 298
 299     uri = webkit_download_get_destination(download);
 300     filename = g_filename_from_uri(uri, NULL, NULL);
 301     if (filename == NULL)
 302     {
 303         /* This really should not happen because WebKit uses that URI to
 304          * write to a file... */
 305         fprintf(stderr, __NAME__": Could not construct file name from URI!\n");
 306         t = g_strdup_printf("%s (%.0f%% of %.1f MB)",
 307                             webkit_uri_response_get_uri(resp), p, size_mb);
 308     }
 309     else
 310     {
 311         base = g_path_get_basename(filename);
 312         t = g_strdup_printf("%s (%.0f%% of %.1f MB)", base, p, size_mb);
 313         g_free(filename);
 314         g_free(base);
 315     }
 316     gtk_tool_button_set_label(GTK_TOOL_BUTTON(tb), t);
 317     g_free(t);
 318 }
 319
 320 void
 321 changed_load_progress(GObject *obj, GParamSpec *pspec, gpointer data)
 322 {
 323     struct Client *c = (struct Client *)data;
 324     gdouble p;
 325     gchar *grab_feeds =
 326         "a = document.querySelectorAll('"
 327         "    html > head > link[rel=\"alternate\"][href][type=\"application/atom+xml\"],"
 328         "    html > head > link[rel=\"alternate\"][href][type=\"application/rss+xml\"]"
 329         "');"
 330         "if (a.length == 0)"
 331         "    null;"
 332         "else"
 333         "{"
 334         "    out = '';"
 335         "    for (i = 0; i < a.length; i++)"
 336         "    {"
 337         "        url = encodeURIComponent(a[i].href);"
 338         "        if ('title' in a[i] && a[i].title != '')"
 339         "            title = encodeURIComponent(a[i].title);"
 340         "        else"
 341         "            title = url;"
 342         "        out += '<li><a href=\"' + url + '\">' + title + '</a></li>';"
 343         "    }"
 344         "    out;"
 345         "}";
 346
 347     p = webkit_web_view_get_estimated_load_progress(WEBKIT_WEB_VIEW(c->web_view));
 348     if (p == 1)
 349     {
 350         p = 0;
 351
 352         /* The page has loaded fully. We now run the short JavaScript
 353          * snippet above that operates on the DOM. It tries to grab all
 354          * occurences of <link rel="alternate" ...>, i.e. RSS/Atom feed
 355          * references. */
 356         webkit_web_view_run_javascript(WEBKIT_WEB_VIEW(c->web_view),
 357                                        grab_feeds, NULL,
 358                                        grab_feeds_finished, c);
 359
 360         run_user_scripts(WEBKIT_WEB_VIEW(c->web_view));
 361     }
 362     gtk_entry_set_progress_fraction(GTK_ENTRY(c->location), p);
 363 }
 364
 365 void
 366 changed_title(GObject *obj, GParamSpec *pspec, gpointer data)
 367 {
 368     const gchar *t, *u;
 369     struct Client *c = (struct Client *)data;
 370
 371     u = webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view));
 372     t = webkit_web_view_get_title(WEBKIT_WEB_VIEW(c->web_view));
 373
 374     u = u == NULL ? __NAME__ : u;
 375     u = u[0] == 0 ? __NAME__ : u;
 376
 377     t = t == NULL ? u : t;
 378     t = t[0] == 0 ? u : t;
 379
 380     gtk_window_set_title(GTK_WINDOW(c->win), t);
 381 }
 382
 383 void
 384 changed_uri(GObject *obj, GParamSpec *pspec, gpointer data)
 385 {
 386     const gchar *t;
 387     struct Client *c = (struct Client *)data;
 388     FILE *fp;
 389
 390     t = webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view));
 391
 392     /* When a web process crashes, we get a "notify::uri" signal, but we
 393      * can no longer read a meaningful URI. It's just an empty string
 394      * now. Not updating the location bar in this scenario is important,
 395      * because we would override the "WEB PROCESS CRASHED" message. */
 396     if (t != NULL && strlen(t) > 0)
 397     {
 398         gtk_entry_set_text(GTK_ENTRY(c->location), t);
 399
 400         if (history_file != NULL)
 401         {
 402             fp = fopen(history_file, "a");
 403             if (fp != NULL)
 404             {
 405                 fprintf(fp, "%s\n", t);
 406                 fclose(fp);
 407             }
 408             else
 409                 perror(__NAME__": Error opening history file");
 410         }
 411     }
 412 }
 413
 414 gboolean
 415 crashed_web_view(WebKitWebView *web_view, gpointer data)
 416 {
 417     gchar *t;
 418     struct Client *c = (struct Client *)data;
 419
 420     t = g_strdup_printf("WEB PROCESS CRASHED: %s",
 421                         webkit_web_view_get_uri(WEBKIT_WEB_VIEW(web_view)));
 422     gtk_entry_set_text(GTK_ENTRY(c->location), t);
 423     g_free(t);
 424
 425     return TRUE;
 426 }
 427
 428 gboolean
 429 decide_policy(WebKitWebView *web_view, WebKitPolicyDecision *decision,
 430               WebKitPolicyDecisionType type, gpointer data)
 431 {
 432     WebKitResponsePolicyDecision *r;
 433
 434     switch (type)
 435     {
 436         case WEBKIT_POLICY_DECISION_TYPE_RESPONSE:
 437             r = WEBKIT_RESPONSE_POLICY_DECISION(decision);
 438             if (!webkit_response_policy_decision_is_mime_type_supported(r))
 439                 webkit_policy_decision_download(decision);
 440             else
 441                 webkit_policy_decision_use(decision);
 442             break;
 443         default:
 444             /* Use whatever default there is. */
 445             return FALSE;
 446     }
 447     return TRUE;
 448 }
 449
 450 void
 451 download_handle_finished(WebKitDownload *download, gpointer data)
 452 {
 453     downloads--;
 454 }
 455
 456 void
 457 download_handle_start(WebKitWebView *web_view, WebKitDownload *download,
 458                       gpointer data)
 459 {
 460     g_signal_connect(G_OBJECT(download), "decide-destination",
 461                      G_CALLBACK(download_handle), data);
 462 }
 463
 464 gboolean
 465 download_handle(WebKitDownload *download, gchar *suggested_filename, gpointer data)
 466 {
 467     gchar *sug_clean, *path, *path2 = NULL, *uri;
 468     GtkToolItem *tb;
 469     int suffix = 1;
 470     size_t i;
 471
 472     sug_clean = g_strdup(suggested_filename);
 473     for (i = 0; i < strlen(sug_clean); i++)
 474         if (sug_clean[i] == G_DIR_SEPARATOR)
 475             sug_clean[i] = '_';
 476
 477     path = g_build_filename(download_dir, sug_clean, NULL);
 478     path2 = g_strdup(path);
 479     while (g_file_test(path2, G_FILE_TEST_EXISTS) && suffix < 1000)
 480     {
 481         g_free(path2);
 482
 483         path2 = g_strdup_printf("%s.%d", path, suffix);
 484         suffix++;
 485     }
 486
 487     if (suffix == 1000)
 488     {
 489         fprintf(stderr, __NAME__": Suffix reached limit for download.\n");
 490         webkit_download_cancel(download);
 491     }
 492     else
 493     {
 494         uri = g_filename_to_uri(path2, NULL, NULL);
 495         webkit_download_set_destination(download, uri);
 496         g_free(uri);
 497
 498         tb = gtk_tool_button_new(NULL, NULL);
 499         gtk_tool_button_set_icon_name(GTK_TOOL_BUTTON(tb), "gtk-delete");
 500         gtk_tool_button_set_label(GTK_TOOL_BUTTON(tb), sug_clean);
 501         gtk_toolbar_insert(GTK_TOOLBAR(dm.toolbar), tb, 0);
 502         gtk_widget_show_all(dm.win);
 503
 504         g_signal_connect(G_OBJECT(download), "notify::estimated-progress",
 505                          G_CALLBACK(changed_download_progress), tb);
 506
 507         downloads++;
 508         g_signal_connect(G_OBJECT(download), "finished",
 509                          G_CALLBACK(download_handle_finished), NULL);
 510
 511         g_object_ref(download);
 512         g_signal_connect(G_OBJECT(tb), "clicked",
 513                          G_CALLBACK(downloadmanager_cancel), download);
 514     }
 515
 516     g_free(sug_clean);
 517     g_free(path);
 518     g_free(path2);
 519
 520     /* Propagate -- to whom it may concern. */
 521     return FALSE;
 522 }
 523
 524 void
 525 downloadmanager_cancel(GtkToolButton *tb, gpointer data)
 526 {
 527     WebKitDownload *download = WEBKIT_DOWNLOAD(data);
 528
 529     webkit_download_cancel(download);
 530     g_object_unref(download);
 531
 532     gtk_widget_destroy(GTK_WIDGET(tb));
 533 }
 534
 535 gboolean
 536 downloadmanager_delete(GtkWidget *obj, gpointer data)
 537 {
 538     if (!quit_if_nothing_active())
 539         gtk_widget_hide(dm.win);
 540
 541     return TRUE;
 542 }
 543
 544 void
 545 downloadmanager_setup(void)
 546 {
 547     dm.win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 548     gtk_window_set_type_hint(GTK_WINDOW(dm.win), GDK_WINDOW_TYPE_HINT_DIALOG);
 549     gtk_window_set_default_size(GTK_WINDOW(dm.win), 500, 250);
 550     gtk_window_set_title(GTK_WINDOW(dm.win), __NAME__" - Download Manager");
 551     g_signal_connect(G_OBJECT(dm.win), "delete-event",
 552                      G_CALLBACK(downloadmanager_delete), NULL);
 553     g_signal_connect(G_OBJECT(dm.win), "key-press-event",
 554                      G_CALLBACK(key_downloadmanager), NULL);
 555
 556     dm.toolbar = gtk_toolbar_new();
 557     gtk_orientable_set_orientation(GTK_ORIENTABLE(dm.toolbar),
 558                                    GTK_ORIENTATION_VERTICAL);
 559     gtk_toolbar_set_style(GTK_TOOLBAR(dm.toolbar), GTK_TOOLBAR_BOTH_HORIZ);
 560     gtk_toolbar_set_show_arrow(GTK_TOOLBAR(dm.toolbar), FALSE);
 561
 562     dm.scroll = gtk_scrolled_window_new(NULL, NULL);
 563     gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(dm.scroll),
 564                                    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 565     gtk_container_add(GTK_CONTAINER(dm.scroll), dm.toolbar);
 566
 567     gtk_container_add(GTK_CONTAINER(dm.win), dm.scroll);
 568 }
 569
 570 gchar *
 571 ensure_uri_scheme(const gchar *t)
 572 {
 573     gchar *f, *fabs;
 574
 575     f = g_ascii_strdown(t, -1);
 576     if (!g_str_has_prefix(f, "http:") &&
 577         !g_str_has_prefix(f, "https:") &&
 578         !g_str_has_prefix(f, "file:") &&
 579         !g_str_has_prefix(f, "about:") &&
 580         !g_str_has_prefix(f, "data:"))
 581     {
 582         g_free(f);
 583         fabs = realpath(t, NULL);
 584         if (fabs != NULL)
 585         {
 586             f = g_strdup_printf("file://%s", fabs);
 587             free(fabs);
 588         }
 589         else
 590             f = g_strdup_printf("http://%s", t);
 591         return f;
 592     }
 593     else
 594         return g_strdup(t);
 595 }
 596
 597 void
 598 external_handler_run(GSimpleAction *simple, GVariant *param, gpointer data)
 599 {
 600     struct Client *c = (struct Client *)data;
 601     gchar *argv[] = { "lariza-external-handler", "-u", NULL, NULL };
 602     GPid pid;
 603     GError *err = NULL;
 604
 605     (void)simple;
 606     (void)param;
 607
 608     argv[2] = c->external_handler_uri;
 609     if (!g_spawn_async(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL,
 610                        &pid, &err))
 611     {
 612         fprintf(stderr, __NAME__": Could not launch key handler: %s\n",
 613                 err->message);
 614         g_error_free(err);
 615     }
 616     else
 617         g_spawn_close_pid(pid);
 618 }
 619
 620 void
 621 grab_environment_configuration(void)
 622 {
 623     const gchar *e;
 624
 625     e = g_getenv(__NAME_UPPERCASE__"_ACCEPTED_LANGUAGE");
 626     if (e != NULL)
 627         accepted_language[0] = g_strdup(e);
 628
 629     e = g_getenv(__NAME_UPPERCASE__"_DOWNLOAD_DIR");
 630     if (e != NULL)
 631         download_dir = g_strdup(e);
 632
 633     e = g_getenv(__NAME_UPPERCASE__"_ENABLE_CONSOLE_TO_STDOUT");
 634     if (e != NULL)
 635         enable_console_to_stdout = TRUE;
 636
 637     e = g_getenv(__NAME_UPPERCASE__"_FIFO_SUFFIX");
 638     if (e != NULL)
 639         fifo_suffix = g_strdup(e);
 640
 641     e = g_getenv(__NAME_UPPERCASE__"_HISTORY_FILE");
 642     if (e != NULL)
 643         history_file = g_strdup(e);
 644
 645     e = g_getenv(__NAME_UPPERCASE__"_HOME_URI");
 646     if (e != NULL)
 647         home_uri = g_strdup(e);
 648
 649     e = g_getenv(__NAME_UPPERCASE__"_USER_AGENT");
 650     if (e != NULL)
 651         user_agent = g_strdup(e);
 652
 653     e = g_getenv(__NAME_UPPERCASE__"_ZOOM");
 654     if (e != NULL)
 655         global_zoom = atof(e);
 656 }
 657
 658 void
 659 grab_feeds_finished(GObject *object, GAsyncResult *result, gpointer data)
 660 {
 661     struct Client *c = (struct Client *)data;
 662     WebKitJavascriptResult *js_result;
 663     JSCValue *value;
 664     JSCException *exception;
 665     GError *err = NULL;
 666     gchar *str_value;
 667
 668     g_free(c->feed_html);
 669     c->feed_html = NULL;
 670
 671     /* This was taken almost verbatim from the example in WebKit's
 672      * documentation:
 673      *
 674      * https://webkitgtk.org/reference/webkit2gtk/stable/WebKitWebView.html#webkit-web-view-run-javascript-finish */
 675
 676     js_result = webkit_web_view_run_javascript_finish(WEBKIT_WEB_VIEW(object),
 677                                                       result, &err);
 678     if (!js_result)
 679     {
 680         fprintf(stderr, __NAME__": Error running javascript: %s\n", err->message);
 681         g_error_free(err);
 682         return;
 683     }
 684
 685     value = webkit_javascript_result_get_js_value(js_result);
 686     if (jsc_value_is_string(value))
 687     {
 688         str_value = jsc_value_to_string(value);
 689         exception = jsc_context_get_exception(jsc_value_get_context(value));
 690         if (exception != NULL)
 691         {
 692             fprintf(stderr, __NAME__": Error running javascript: %s\n",
 693                     jsc_exception_get_message(exception));
 694         }
 695         else
 696             c->feed_html = str_value;
 697
 698         gtk_entry_set_icon_from_icon_name(GTK_ENTRY(c->location),
 699                                           GTK_ENTRY_ICON_PRIMARY,
 700                                           "application-rss+xml-symbolic");
 701         gtk_entry_set_icon_activatable(GTK_ENTRY(c->location),
 702                                        GTK_ENTRY_ICON_PRIMARY,
 703                                        TRUE);
 704     }
 705     else
 706     {
 707         gtk_entry_set_icon_from_icon_name(GTK_ENTRY(c->location),
 708                                           GTK_ENTRY_ICON_PRIMARY,
 709                                           NULL);
 710     }
 711
 712     webkit_javascript_result_unref(js_result);
 713 }
 714
 715 void
 716 hover_web_view(WebKitWebView *web_view, WebKitHitTestResult *ht, guint modifiers,
 717                gpointer data)
 718 {
 719     struct Client *c = (struct Client *)data;
 720
 721     if (!gtk_widget_is_focus(c->location))
 722     {
 723         if (webkit_hit_test_result_context_is_link(ht))
 724         {
 725             gtk_entry_set_text(GTK_ENTRY(c->location),
 726                                webkit_hit_test_result_get_link_uri(ht));
 727
 728             if (c->hover_uri != NULL)
 729                 g_free(c->hover_uri);
 730             c->hover_uri = g_strdup(webkit_hit_test_result_get_link_uri(ht));
 731         }
 732         else
 733         {
 734             gtk_entry_set_text(GTK_ENTRY(c->location),
 735                                webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view)));
 736
 737             if (c->hover_uri != NULL)
 738                 g_free(c->hover_uri);
 739             c->hover_uri = NULL;
 740         }
 741     }
 742 }
 743
 744 void
 745 icon_location(GtkEntry *entry, GtkEntryIconPosition icon_pos, GdkEvent *event,
 746               gpointer data)
 747 {
 748     struct Client *c = (struct Client *)data;
 749     gchar *d;
 750     gchar *data_template =
 751         "data:text/html,"
 752         "<!DOCTYPE html>"
 753         "<html>"
 754         "    <head>"
 755         "        <meta charset=\"UTF-8\">"
 756         "        <title>Feeds</title>"
 757         "    </head>"
 758         "    <body>"
 759         "        <p>Feeds found on this page:</p>"
 760         "        <ul>"
 761         "        %s"
 762         "        </ul>"
 763         "    </body>"
 764         "</html>";
 765
 766     if (c->feed_html != NULL)
 767     {
 768         /* What we're actually trying to do is show a simple HTML page
 769          * that lists all the feeds on the current page. The function
 770          * webkit_web_view_load_html() looks like the proper way to do
 771          * that. Sad thing is, it doesn't create a history entry, but
 772          * instead simply replaces the content of the current page. This
 773          * is not what we want.
 774          *
 775          * RFC 2397 [0] defines the data URI scheme [1]. We abuse this
 776          * mechanism to show my custom HTML snippet *and* create a
 777          * history entry.
 778          *
 779          * [0]: https://tools.ietf.org/html/rfc2397
 780          * [1]: https://en.wikipedia.org/wiki/Data_URI_scheme */
 781         d = g_strdup_printf(data_template, c->feed_html);
 782         webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), d);
 783         g_free(d);
 784     }
 785 }
 786
 787 gboolean
 788 key_common(GtkWidget *widget, GdkEvent *event, gpointer data)
 789 {
 790     struct Client *c = (struct Client *)data;
 791     WebKitWebContext *wc = webkit_web_view_get_context(WEBKIT_WEB_VIEW(c->web_view));
 792     gchar *f;
 793
 794     if (event->type == GDK_KEY_PRESS)
 795     {
 796         if (((GdkEventKey *)event)->state & GDK_MOD1_MASK)
 797         {
 798             switch (((GdkEventKey *)event)->keyval)
 799             {
 800                 case GDK_KEY_q:  /* close window (left hand) */
 801                     gtk_widget_destroy(c->win);
 802                     return TRUE;
 803                 case GDK_KEY_w:  /* home (left hand) */
 804                     f = ensure_uri_scheme(home_uri);
 805                     webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), f);
 806                     g_free(f);
 807                     return TRUE;
 808                 case GDK_KEY_e:  /* new tab (left hand) */
 809                     f = ensure_uri_scheme(home_uri);
 810                     client_new(f, NULL, TRUE);
 811                     g_free(f);
 812                     return TRUE;
 813                 case GDK_KEY_r:  /* reload (left hand) */
 814                     webkit_web_view_reload_bypass_cache(WEBKIT_WEB_VIEW(
 815                                                         c->web_view));
 816                     return TRUE;
 817                 case GDK_KEY_d:  /* download manager (left hand) */
 818                     gtk_widget_show_all(dm.win);
 819                     return TRUE;
 820                 case GDK_KEY_2:  /* search forward (left hand) */
 821                 case GDK_KEY_n:  /* search forward (maybe both hands) */
 822                     search(c, 1);
 823                     return TRUE;
 824                 case GDK_KEY_3:  /* search backward (left hand) */
 825                     search(c, -1);
 826                     return TRUE;
 827                 case GDK_KEY_l:  /* location (BOTH hands) */
 828                     gtk_widget_grab_focus(c->location);
 829                     return TRUE;
 830                 case GDK_KEY_k:  /* initiate search (BOTH hands) */
 831                     gtk_widget_grab_focus(c->location);
 832                     gtk_entry_set_text(GTK_ENTRY(c->location), ":/");
 833                     gtk_editable_set_position(GTK_EDITABLE(c->location), -1);
 834                     return TRUE;
 835                 case GDK_KEY_c:  /* reload trusted certs (left hand) */
 836                     trust_user_certs(wc);
 837                     return TRUE;
 838                 case GDK_KEY_x:  /* launch external handler (left hand) */
 839                     if (c->external_handler_uri != NULL)
 840                         g_free(c->external_handler_uri);
 841                     c->external_handler_uri = g_strdup(
 842                         webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view)));
 843                     external_handler_run(NULL, NULL, c);
 844                     return TRUE;
 845             }
 846         }
 847         /* navigate backward (left hand) */
 848         else if (((GdkEventKey *)event)->keyval == GDK_KEY_F2)
 849         {
 850             webkit_web_view_go_back(WEBKIT_WEB_VIEW(c->web_view));
 851             return TRUE;
 852         }
 853         /* navigate forward (left hand) */
 854         else if (((GdkEventKey *)event)->keyval == GDK_KEY_F3)
 855         {
 856             webkit_web_view_go_forward(WEBKIT_WEB_VIEW(c->web_view));
 857             return TRUE;
 858         }
 859     }
 860
 861     return FALSE;
 862 }
 863
 864 gboolean
 865 key_downloadmanager(GtkWidget *widget, GdkEvent *event, gpointer data)
 866 {
 867     if (event->type == GDK_KEY_PRESS)
 868     {
 869         if (((GdkEventKey *)event)->state & GDK_MOD1_MASK)
 870         {
 871             switch (((GdkEventKey *)event)->keyval)
 872             {
 873                 case GDK_KEY_d:  /* close window (left hand) */
 874                 case GDK_KEY_q:
 875                     downloadmanager_delete(dm.win, NULL);
 876                     return TRUE;
 877             }
 878         }
 879     }
 880
 881     return FALSE;
 882 }
 883
 884 gboolean
 885 key_location(GtkWidget *widget, GdkEvent *event, gpointer data)
 886 {
 887     struct Client *c = (struct Client *)data;
 888     const gchar *t;
 889     gchar *f;
 890
 891     if (key_common(widget, event, data))
 892         return TRUE;
 893
 894     if (event->type == GDK_KEY_PRESS)
 895     {
 896         switch (((GdkEventKey *)event)->keyval)
 897         {
 898             case GDK_KEY_KP_Enter:
 899             case GDK_KEY_Return:
 900                 gtk_widget_grab_focus(c->web_view);
 901                 t = gtk_entry_get_text(GTK_ENTRY(c->location));
 902                 if (t != NULL && t[0] == ':' && t[1] == '/')
 903                 {
 904                     if (search_text != NULL)
 905                         g_free(search_text);
 906                     search_text = g_strdup(t + 2);
 907                     search(c, 0);
 908                 }
 909                 else if (!keywords_try_search(WEBKIT_WEB_VIEW(c->web_view), t))
 910                 {
 911                     f = ensure_uri_scheme(t);
 912                     webkit_web_view_load_uri(WEBKIT_WEB_VIEW(c->web_view), f);
 913                     g_free(f);
 914                 }
 915                 return TRUE;
 916             case GDK_KEY_Escape:
 917                 t = webkit_web_view_get_uri(WEBKIT_WEB_VIEW(c->web_view));
 918                 gtk_entry_set_text(GTK_ENTRY(c->location),
 919                                    (t == NULL ? __NAME__ : t));
 920                 return TRUE;
 921         }
 922     }
 923
 924     return FALSE;
 925 }
 926
 927 gboolean
 928 key_web_view(GtkWidget *widget, GdkEvent *event, gpointer data)
 929 {
 930     struct Client *c = (struct Client *)data;
 931     gdouble dx, dy;
 932     gfloat z;
 933
 934     if (key_common(widget, event, data))
 935         return TRUE;
 936
 937     if (event->type == GDK_KEY_PRESS)
 938     {
 939         if (((GdkEventKey *)event)->keyval == GDK_KEY_Escape)
 940         {
 941             webkit_web_view_stop_loading(WEBKIT_WEB_VIEW(c->web_view));
 942             gtk_entry_set_progress_fraction(GTK_ENTRY(c->location), 0);
 943         }
 944     }
 945     else if (event->type == GDK_BUTTON_RELEASE)
 946     {
 947         switch (((GdkEventButton *)event)->button)
 948         {
 949             case 2:
 950                 if (c->hover_uri != NULL)
 951                 {
 952                     client_new(c->hover_uri, NULL, TRUE);
 953                     return TRUE;
 954                 }
 955                 break;
 956             case 8:
 957                 webkit_web_view_go_back(WEBKIT_WEB_VIEW(c->web_view));
 958                 return TRUE;
 959             case 9:
 960                 webkit_web_view_go_forward(WEBKIT_WEB_VIEW(c->web_view));
 961                 return TRUE;
 962         }
 963     }
 964     else if (event->type == GDK_SCROLL)
 965     {
 966         if (((GdkEventScroll *)event)->state & GDK_MOD1_MASK ||
 967             ((GdkEventScroll *)event)->state & GDK_CONTROL_MASK)
 968         {
 969             gdk_event_get_scroll_deltas(event, &dx, &dy);
 970             z = webkit_web_view_get_zoom_level(WEBKIT_WEB_VIEW(c->web_view));
 971             z += -dy * 0.1;
 972             z = dx != 0 ? global_zoom : z;
 973             webkit_web_view_set_zoom_level(WEBKIT_WEB_VIEW(c->web_view), z);
 974             return TRUE;
 975         }
 976     }
 977
 978     return FALSE;
 979 }
 980
 981 void
 982 keywords_load(void)
 983 {
 984     GError *err = NULL;
 985     GIOChannel *channel = NULL;
 986     gchar *path = NULL, *buf = NULL;
 987     gchar **tokens = NULL;
 988
 989     keywords = g_hash_table_new(g_str_hash, g_str_equal);
 990
 991     path = g_build_filename(g_get_user_config_dir(), __NAME__, "keywordsearch",
 992                             NULL);
 993     channel = g_io_channel_new_file(path, "r", &err);
 994     if (channel != NULL)
 995     {
 996         while (g_io_channel_read_line(channel, &buf, NULL, NULL, NULL)
 997                == G_IO_STATUS_NORMAL)
 998         {
 999             g_strstrip(buf);
1000             if (buf[0] != '#')
1001             {
1002                 tokens = g_strsplit(buf, " ", 2);
1003                 if (tokens[0] != NULL && tokens[1] != NULL)
1004                     g_hash_table_insert(keywords, g_strdup(tokens[0]),
1005                                         g_strdup(tokens[1]));
1006                 g_strfreev(tokens);
1007             }
1008             g_free(buf);
1009         }
1010         g_io_channel_shutdown(channel, FALSE, NULL);
1011     }
1012     g_free(path);
1013 }
1014
1015 gboolean
1016 keywords_try_search(WebKitWebView *web_view, const gchar *t)
1017 {
1018     gboolean ret = FALSE;
1019     gchar **tokens = NULL;
1020     gchar *val = NULL, *escaped = NULL, *uri = NULL;
1021
1022     tokens = g_strsplit(t, " ", 2);
1023     if (tokens[0] != NULL && tokens[1] != NULL)
1024     {
1025         val = g_hash_table_lookup(keywords, tokens[0]);
1026         if (val != NULL)
1027         {
1028             escaped = g_uri_escape_string(tokens[1], NULL, TRUE);
1029             uri = g_strdup_printf((gchar *)val, escaped);
1030             webkit_web_view_load_uri(web_view, uri);
1031             g_free(uri);
1032             g_free(escaped);
1033             ret = TRUE;
1034         }
1035     }
1036     g_strfreev(tokens);
1037
1038     return ret;
1039 }
1040
1041 gboolean
1042 menu_web_view(WebKitWebView *web_view, WebKitContextMenu *menu, GdkEvent *ev,
1043               WebKitHitTestResult *ht, gpointer data)
1044 {
1045     struct Client *c = (struct Client *)data;
1046     GSimpleAction *action = NULL;
1047     WebKitContextMenuItem *mi = NULL;
1048     const gchar *uri = NULL;
1049
1050     (void)ev;
1051
1052     if (webkit_hit_test_result_context_is_link(ht))
1053         uri = webkit_hit_test_result_get_link_uri(ht);
1054     else if (webkit_hit_test_result_context_is_image(ht))
1055         uri = webkit_hit_test_result_get_image_uri(ht);
1056     else if (webkit_hit_test_result_context_is_media(ht))
1057         uri = webkit_hit_test_result_get_media_uri(ht);
1058
1059     if (uri != NULL)
1060     {
1061         webkit_context_menu_append(menu, webkit_context_menu_item_new_separator());
1062
1063         if (c->external_handler_uri != NULL)
1064             g_free(c->external_handler_uri);
1065         c->external_handler_uri = g_strdup(uri);
1066         action = g_simple_action_new("external_handler", NULL);
1067         g_signal_connect(G_OBJECT(action), "activate",
1068                          G_CALLBACK(external_handler_run), data);
1069         mi = webkit_context_menu_item_new_from_gaction(G_ACTION(action),
1070                                                        "Open with external handler",
1071                                                        NULL);
1072         webkit_context_menu_append(menu, mi);
1073         g_object_unref(action);
1074     }
1075
1076     /* FALSE = Show the menu. (TRUE = Don't ever show it.) */
1077     return FALSE;
1078 }
1079
1080 gboolean
1081 quit_if_nothing_active(void)
1082 {
1083     if (clients == 0)
1084     {
1085         if (downloads == 0)
1086         {
1087             gtk_main_quit();
1088             return TRUE;
1089         }
1090         else
1091             gtk_widget_show_all(dm.win);
1092     }
1093
1094     return FALSE;
1095 }
1096
1097 gboolean
1098 remote_msg(GIOChannel *channel, GIOCondition condition, gpointer data)
1099 {
1100     gchar *uri = NULL;
1101
1102     g_io_channel_read_line(channel, &uri, NULL, NULL, NULL);
1103     if (uri)
1104     {
1105         g_strstrip(uri);
1106         client_new(uri, NULL, TRUE);
1107         g_free(uri);
1108     }
1109     return TRUE;
1110 }
1111
1112 void
1113 run_user_scripts(WebKitWebView *web_view)
1114 {
1115     gchar *base = NULL, *path = NULL, *contents = NULL;
1116     const gchar *entry = NULL;
1117     GDir *scriptdir = NULL;
1118
1119     base = g_build_filename(g_get_user_config_dir(), __NAME__, "user-scripts", NULL);
1120     scriptdir = g_dir_open(base, 0, NULL);
1121     if (scriptdir != NULL)
1122     {
1123         while ((entry = g_dir_read_name(scriptdir)) != NULL)
1124         {
1125             path = g_build_filename(base, entry, NULL);
1126             if (g_str_has_suffix(path, ".js"))
1127             {
1128                 if (g_file_get_contents(path, &contents, NULL, NULL))
1129                 {
1130                     webkit_web_view_run_javascript(web_view, contents, NULL, NULL, NULL);
1131                     g_free(contents);
1132                 }
1133             }
1134             g_free(path);
1135         }
1136         g_dir_close(scriptdir);
1137     }
1138
1139     g_free(base);
1140 }
1141
1142 void
1143 search(gpointer data, gint direction)
1144 {
1145     struct Client *c = (struct Client *)data;
1146     WebKitWebView *web_view = WEBKIT_WEB_VIEW(c->web_view);
1147     WebKitFindController *fc = webkit_web_view_get_find_controller(web_view);
1148
1149     if (search_text == NULL)
1150         return;
1151
1152     switch (direction)
1153     {
1154         case 0:
1155             webkit_find_controller_search(fc, search_text,
1156                                           WEBKIT_FIND_OPTIONS_CASE_INSENSITIVE |
1157                                           WEBKIT_FIND_OPTIONS_WRAP_AROUND,
1158                                           G_MAXUINT);
1159             break;
1160         case 1:
1161             webkit_find_controller_search_next(fc);
1162             break;
1163         case -1:
1164             webkit_find_controller_search_previous(fc);
1165             break;
1166     }
1167 }
1168
1169 void
1170 show_web_view(WebKitWebView *web_view, gpointer data)
1171 {
1172     struct Client *c = (struct Client *)data;
1173
1174     (void)web_view;
1175
1176     gtk_widget_grab_focus(c->web_view);
1177     gtk_widget_show_all(c->win);
1178 }
1179
1180 void
1181 trust_user_certs(WebKitWebContext *wc)
1182 {
1183     GTlsCertificate *cert;
1184     const gchar *basedir, *file, *absfile;
1185     GDir *dir;
1186
1187     basedir = g_build_filename(g_get_user_config_dir(), __NAME__, "certs", NULL);
1188     dir = g_dir_open(basedir, 0, NULL);
1189     if (dir != NULL)
1190     {
1191         file = g_dir_read_name(dir);
1192         while (file != NULL)
1193         {
1194             absfile = g_build_filename(g_get_user_config_dir(), __NAME__, "certs",
1195                                        file, NULL);
1196             cert = g_tls_certificate_new_from_file(absfile, NULL);
1197             if (cert == NULL)
1198                 fprintf(stderr, __NAME__": Could not load trusted cert '%s'\n", file);
1199             else
1200                 webkit_web_context_allow_tls_certificate_for_host(wc, cert, file);
1201             file = g_dir_read_name(dir);
1202         }
1203         g_dir_close(dir);
1204     }
1205 }
1206
1207
1208 int
1209 main(int argc, char **argv)
1210 {
1211     gchar *c;
1212     int opt, i;
1213
1214     gtk_init(&argc, &argv);
1215     webkit_web_context_set_process_model(webkit_web_context_get_default(),
1216         WEBKIT_PROCESS_MODEL_MULTIPLE_SECONDARY_PROCESSES);
1217
1218     grab_environment_configuration();
1219
1220     while ((opt = getopt(argc, argv, "C")) != -1)
1221     {
1222         switch (opt)
1223         {
1224             case 'C':
1225                 cooperative_instances = FALSE;
1226                 break;
1227             default:
1228                 fprintf(stderr, "Usage: "__NAME__" [OPTION]... [URI]...\n");
1229                 exit(EXIT_FAILURE);
1230         }
1231     }
1232
1233     keywords_load();
1234     if (cooperative_instances)
1235         cooperation_setup();
1236     downloadmanager_setup();
1237
1238     if (!cooperative_instances || cooperative_alone)
1239     {
1240         c = g_build_filename(g_get_user_config_dir(), __NAME__, "web_extensions",
1241                              NULL);
1242         webkit_web_context_set_web_extensions_directory(
1243             webkit_web_context_get_default(), c
1244         );
1245     }
1246
1247     if (optind >= argc)
1248         client_new(home_uri, NULL, TRUE);
1249     else
1250     {
1251         for (i = optind; i < argc; i++)
1252             client_new(argv[i], NULL, TRUE);
1253     }
1254
1255     if (!cooperative_instances || cooperative_alone)
1256         gtk_main();
1257     exit(EXIT_SUCCESS);
1258 }