surf.c

   1 /* See LICENSE file for copyright and license details.
   2  *
   3  * To understand surf, start reading main().
   4  */
   5 #include <X11/X.h>
   6 #include <X11/Xatom.h>
   7 #include <gtk/gtk.h>
   8 #include <gdk/gdkx.h>
   9 #include <gdk/gdk.h>
  10 #include <gdk/gdkkeysyms.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <webkit/webkit.h>
  16
  17 #define LENGTH(x) (sizeof x / sizeof x[0])
  18 /* Plan9-style Argument parsing */
  19 /* Vars: _c -> count; _b -> break; _a -> argument */
  20 #define ARG int _c, _b; char *_a; \
  21         for(_c = 1; _c < argc && argv[_c][0] == '-' && argv[_c][1] && \
  22                         (strcmp(argv[_c], "--") != 0); _c++) \
  23                 for(_a = &argv[_c][1], _b = 0; !_b && *_a; _a++ ) \
  24                         switch(*_a)
  25 #define ARGVAL()        (!_b && _a[1] && (_b = 1) ? &_a[1] : _c + 1 == argc ? \
  26                 0 : argv[++_c])
  27 #define ARGCHR()        (*_a)
  28 #define ARGC()          _c
  29
  30 Display *dpy;
  31 Atom urlprop;
  32 typedef struct Client {
  33         GtkWidget *win;
  34         GtkWidget *browser;
  35         WebKitWebView *view;
  36         gchar *title;
  37         gint progress;
  38         struct Client *next;
  39 } Client;
  40 Client *clients = NULL;
  41 gboolean embed = FALSE;
  42 gboolean showxid = FALSE;
  43 gboolean ignore_once = FALSE;
  44
  45 static Client *newclient();
  46 static void die(char *str);
  47 static void setup(void);
  48 static void cleanup(void);
  49 static void updatetitle(Client *c);
  50 static void destroywin(GtkWidget* w, gpointer d);
  51 static gboolean keypress(GtkWidget* w, GdkEventKey *ev, gpointer d);
  52 static void titlechange(WebKitWebView* view, WebKitWebFrame* frame, const gchar* title, gpointer d);
  53 static void progresschange(WebKitWebView *view, gint p, gpointer d);
  54 static void loadcommit(WebKitWebView *view, WebKitWebFrame *f, gpointer d);
  55 static void linkhover(WebKitWebView* page, const gchar* t, const gchar* l, gpointer d);
  56 static void destroyclient(Client *c);
  57 static gboolean newwindow(WebKitWebView *view, WebKitWebFrame *f,
  58                 WebKitNetworkRequest *r, WebKitWebNavigationAction *n,
  59                 WebKitWebPolicyDecision *p, gpointer d);
  60 static gboolean download(WebKitWebView *view, GObject *o, gpointer d);
  61 static void loaduri(const Client *c, const gchar *uri);
  62 static void loadfile(const Client *c, const gchar *f);
  63 GdkFilterReturn processx(GdkXEvent *xevent, GdkEvent *event, gpointer data);
  64
  65 void
  66 cleanup(void) {
  67         while(clients)
  68                 destroyclient(clients);
  69 }
  70
  71 GdkFilterReturn
  72 processx(GdkXEvent *e, GdkEvent *event, gpointer d) {
  73         XPropertyEvent *ev;
  74         Client *c = (Client *)d;
  75         Atom adummy;
  76         int idummy;
  77         unsigned long ldummy;
  78         unsigned char *buf = NULL;
  79         if(((XEvent *)e)->type == PropertyNotify) {
  80                 ev = &((XEvent *)e)->xproperty;
  81                 if(ignore_once == FALSE && ev->atom == urlprop && ev->state == PropertyNewValue) {
  82                         XGetWindowProperty(dpy, ev->window, urlprop, 0L, BUFSIZ, False, XA_STRING,
  83                                 &adummy, &idummy, &ldummy, &ldummy, &buf);
  84                         loaduri(c, (gchar *)buf);
  85                         XFree(buf);
  86                         return GDK_FILTER_REMOVE;
  87                 }
  88                 ignore_once = FALSE;
  89         }
  90         return GDK_FILTER_CONTINUE;
  91 }
  92
  93 void
  94 loadfile(const Client *c, const gchar *f) {
  95         GIOChannel *chan = NULL;
  96         GError *e = NULL;
  97         GString *code = g_string_new("");
  98         GString *uri = g_string_new(f);
  99         gchar *line;
 100
 101         if(strcmp(f, "-") == 0) {
 102                 chan = g_io_channel_unix_new(STDIN_FILENO);
 103                 if (chan) {
 104                         while(g_io_channel_read_line(chan, &line, NULL, NULL, &e) == G_IO_STATUS_NORMAL) {
 105                                 g_string_append(code, line);
 106                                 g_free(line);
 107                         }
 108                         webkit_web_view_load_html_string(c->view, code->str, NULL);
 109                         g_io_channel_shutdown(chan, FALSE, NULL);
 110                 }
 111         }
 112         else {
 113                 g_string_prepend(uri, "file://");
 114                 loaduri(c, uri->str);
 115         }
 116
 117 }
 118
 119 static void loaduri(const Client *c, const gchar *uri) {
 120         GString* u = g_string_new(uri);
 121         if(g_strrstr(u->str, ":") == NULL)
 122                 g_string_prepend(u, "http://");
 123         webkit_web_view_load_uri(c->view, u->str);
 124         g_string_free(u, TRUE);
 125 }
 126
 127 gboolean
 128 download(WebKitWebView *view, GObject *o, gpointer d) {
 129         /* TODO */
 130         return FALSE;
 131 }
 132
 133 gboolean
 134 newwindow(WebKitWebView *view, WebKitWebFrame *f,
 135                 WebKitNetworkRequest *r, WebKitWebNavigationAction *n,
 136                 WebKitWebPolicyDecision *p, gpointer d) {
 137         puts("new");
 138         Client *c = newclient();
 139         webkit_web_view_load_request(c->view, r);
 140         return TRUE;
 141 }
 142 void
 143 linkhover(WebKitWebView* page, const gchar* t, const gchar* l, gpointer d) {
 144         Client *c = (Client *)d;
 145
 146         if(l)
 147                 gtk_window_set_title(GTK_WINDOW(c->win), l);
 148         else
 149                 updatetitle(c);
 150 }
 151
 152 void
 153 loadcommit(WebKitWebView *view, WebKitWebFrame *f, gpointer d) {
 154         Client *c = (Client *)d;
 155         gchar *uri;
 156
 157         if(!(uri = (gchar *)webkit_web_view_get_uri(view)))
 158                 uri = "(null)";
 159         ignore_once = TRUE;
 160         XChangeProperty(dpy, GDK_WINDOW_XID(GTK_WIDGET(c->win)->window), urlprop,
 161                         XA_STRING, 8, PropModeReplace, (unsigned char *)uri,
 162                         strlen(uri) + 1);
 163 }
 164
 165 void
 166 progresschange(WebKitWebView* view, gint p, gpointer d) {
 167         Client *c = (Client *)d;
 168
 169         c->progress = p;
 170         updatetitle(c);
 171 }
 172
 173 void
 174 updatetitle(Client *c) {
 175         char t[512];
 176         if(c->progress == 100)
 177                 snprintf(t, LENGTH(t), "%s", c->title);
 178         else
 179                 snprintf(t, LENGTH(t), "%s [%i%%]", c->title, c->progress);
 180         gtk_window_set_title(GTK_WINDOW(c->win), t);
 181 }
 182
 183 void
 184 titlechange(WebKitWebView *v, WebKitWebFrame *f, const gchar *t, gpointer d) {
 185         Client *c = (Client *)d;
 186
 187         if(c->title)
 188                 g_free(c->title);
 189         c->title = g_strdup(t);
 190         updatetitle(c);
 191 }
 192
 193 void
 194 destroywin(GtkWidget* w, gpointer d) {
 195         Client *c = (Client *)d;
 196
 197         destroyclient(c);
 198 }
 199
 200 void
 201 destroyclient(Client *c) {
 202         Client *p;
 203         gtk_widget_destroy(c->win);
 204         if(clients == c && c->next == NULL)
 205                 gtk_main_quit();
 206         for(p = clients; p && p->next != c; p = p->next);
 207         if(p)
 208                 p->next = c->next;
 209         else
 210                 clients = c->next;
 211         free(c);
 212 }
 213
 214 gboolean
 215 keypress(GtkWidget* w, GdkEventKey *ev, gpointer d) {
 216         Client *c = (Client *)d;
 217
 218         if(ev->type == GDK_KEY_PRESS && (ev->state == GDK_CONTROL_MASK
 219                         || ev->state == (GDK_CONTROL_MASK | GDK_SHIFT_MASK))) {
 220                 switch(ev->keyval) {
 221                 case GDK_r:
 222                 case GDK_R:
 223                         if((ev->state & GDK_SHIFT_MASK))
 224                                  webkit_web_view_reload_bypass_cache(c->view);
 225                         else
 226                                  webkit_web_view_reload(c->view);
 227                         return TRUE;
 228                 case GDK_go:
 229                         /* TODO */
 230                         return TRUE;
 231                 case GDK_slash:
 232                         /* TODO */
 233                         return TRUE;
 234                 case GDK_Left:
 235                         webkit_web_view_go_back(c->view);
 236                         return TRUE;
 237                 case GDK_Right:
 238                         webkit_web_view_go_forward(c->view);
 239                         return TRUE;
 240                 }
 241         }
 242         return FALSE;
 243 }
 244
 245 void setup(void) {
 246         dpy = GDK_DISPLAY();
 247         urlprop = XInternAtom(dpy, "_SURF_URL", False);
 248 }
 249
 250 void die(char *str) {
 251         fputs(str, stderr);
 252         exit(EXIT_FAILURE);
 253 }
 254
 255 Client *
 256 newclient(void) {
 257         Client *c;
 258         if(!(c = calloc(1, sizeof(Client))))
 259                 die("Cannot malloc!\n");
 260         if(embed) {
 261                 c->win = gtk_plug_new(0);
 262         }
 263         else {
 264                 c->win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 265                 gtk_window_set_wmclass(GTK_WINDOW(c->win), "surf", "surf");
 266         }
 267         gtk_window_set_default_size(GTK_WINDOW(c->win), 800, 600);
 268         c->browser = gtk_scrolled_window_new(NULL, NULL);
 269         g_signal_connect (G_OBJECT(c->win), "destroy", G_CALLBACK(destroywin), c);
 270         g_signal_connect (G_OBJECT(c->win), "key-press-event", G_CALLBACK(keypress), c);
 271
 272         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(c->browser),
 273                         GTK_POLICY_NEVER, GTK_POLICY_NEVER);
 274         c->view = WEBKIT_WEB_VIEW(webkit_web_view_new());
 275         gtk_container_add(GTK_CONTAINER(c->browser), GTK_WIDGET(c->view));
 276
 277         g_signal_connect(G_OBJECT(c->view), "title-changed", G_CALLBACK(titlechange), c);
 278         g_signal_connect(G_OBJECT(c->view), "load-progress-changed", G_CALLBACK(progresschange), c);
 279         g_signal_connect(G_OBJECT(c->view), "load-committed", G_CALLBACK(loadcommit), c);
 280         g_signal_connect(G_OBJECT(c->view), "hovering-over-link", G_CALLBACK(linkhover), c);
 281         g_signal_connect(G_OBJECT(c->view), "new-window", G_CALLBACK(newwindow), c);
 282         g_signal_connect(G_OBJECT(c->view), "download-requested", G_CALLBACK(download), c);
 283
 284         gtk_container_add(GTK_CONTAINER(c->win), c->browser);
 285         gtk_widget_grab_focus(GTK_WIDGET(c->view));
 286         gtk_widget_show_all(c->win);
 287         if(showxid)
 288                 printf("%u\n", (unsigned int)GDK_WINDOW_XID(GTK_WIDGET(c->win)->window));
 289         c->next = clients;
 290         clients = c;
 291         gdk_window_set_events(GTK_WIDGET(c->win)->window, GDK_ALL_EVENTS_MASK);
 292         gdk_window_add_filter(GTK_WIDGET(c->win)->window, processx, c);
 293         return c;
 294 }
 295
 296 int main(int argc, char *argv[]) {
 297         gchar *uri = NULL, *file = NULL;
 298         Client *c;
 299
 300         gtk_init(NULL, NULL);
 301         if (!g_thread_supported())
 302                 g_thread_init(NULL);
 303         setup();
 304         ARG {
 305         case 'x':
 306                 showxid = TRUE;
 307                 break;
 308         case 'e':
 309                 showxid = TRUE;
 310                 embed = TRUE;
 311                 break;
 312         case 'u':
 313                 if(!(uri = ARGVAL()))
 314                         goto argerr;
 315                 c = newclient();
 316                 loaduri(c, uri);
 317                 updatetitle(c);
 318                 break;
 319         case 'f':
 320                 if(!(file = ARGVAL()))
 321                         goto argerr;
 322                 c = newclient();
 323                 loadfile(c, file);
 324                 updatetitle(c);
 325                 break;
 326         argerr:
 327         default:
 328                 puts("surf - simple browser");
 329                 printf("usage: %s [-e] [-x] [-u uri] [-f file]\n", argv[0]);
 330                 return EXIT_FAILURE;
 331         }
 332         if(argc != ARGC())
 333                 goto argerr;
 334         if(!clients)
 335                 newclient();
 336         gtk_main();
 337         cleanup();
 338         return EXIT_SUCCESS;
 339 }