surf

surf browser, a WebKit based browser
git clone git://git.suckless.org/surf
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webext-surf.c (3294B)

      1 #include <sys/socket.h>
      2 #include <sys/stat.h>
      3 #include <fcntl.h>
      4 #include <inttypes.h>
      5 #include <limits.h>
      6 #include <stdio.h>
      7 #include <stdlib.h>
      8 
      9 #include <gio/gio.h>
     10 #include <webkit2/webkit-web-extension.h>
     11 #include <webkitdom/webkitdom.h>
     12 #include <webkitdom/WebKitDOMDOMWindowUnstable.h>
     13 
     14 #include "common.h"
     15 
     16 #define LENGTH(x)   (sizeof(x) / sizeof(x[0]))
     17 
     18 static WebKitWebExtension *webext;
     19 static int sock;
     20 
     21 static void
     22 msgsurf(guint64 pageid, const char *s)
     23 {
     24 	static char msg[MSGBUFSZ];
     25 	size_t sln = strlen(s);
     26 	int ret;
     27 
     28 	if ((ret = snprintf(msg, sizeof(msg), "%c%s", pageid, s))
     29 	    >= sizeof(msg)) {
     30 		fprintf(stderr, "webext: msg: message too long: %d\n", ret);
     31 		return;
     32 	}
     33 
     34 	if (send(sock, msg, ret, 0) < 0)
     35 		fprintf(stderr, "webext: error sending: %s\n", msg+1);
     36 }
     37 
     38 static gboolean
     39 readsock(GIOChannel *s, GIOCondition c, gpointer unused)
     40 {
     41 	static char js[48], msg[MSGBUFSZ];
     42 	WebKitWebPage *page;
     43 	JSCContext *jsc;
     44 	GError *gerr = NULL;
     45 	gsize msgsz;
     46 
     47 	if (g_io_channel_read_chars(s, msg, sizeof(msg), &msgsz, &gerr) !=
     48 	    G_IO_STATUS_NORMAL) {
     49 		if (gerr) {
     50 			fprintf(stderr, "webext: error reading socket: %s\n",
     51 			        gerr->message);
     52 			g_error_free(gerr);
     53 		}
     54 		return TRUE;
     55 	}
     56 
     57 	if (msgsz < 2) {
     58 		fprintf(stderr, "webext: readsock: message too short: %d\n",
     59 		        msgsz);
     60 		return TRUE;
     61 	}
     62 
     63 	if (!(page = webkit_web_extension_get_page(webext, msg[0])))
     64 		return TRUE;
     65 
     66 	jsc = webkit_frame_get_js_context(webkit_web_page_get_main_frame(page));
     67 
     68 	switch (msg[1]) {
     69 	case 'h':
     70 		if (msgsz != 3)
     71 			return TRUE;
     72 		snprintf(js, sizeof(js),
     73 		         "window.scrollBy(window.innerWidth/100*%d,0);",
     74 		         msg[2]);
     75 		jsc_context_evaluate(jsc, js, -1);
     76 		break;
     77 	case 'v':
     78 		if (msgsz != 3)
     79 			return TRUE;
     80 		snprintf(js, sizeof(js),
     81 		         "window.scrollBy(0,window.innerHeight/100*%d);",
     82 		         msg[2]);
     83 		jsc_context_evaluate(jsc, js, -1);
     84 		break;
     85 	}
     86 
     87 	return TRUE;
     88 }
     89 
     90 static void
     91 pageusermessagereply(GObject *o, GAsyncResult *r, gpointer page)
     92 {
     93 	WebKitUserMessage *m;
     94 	GUnixFDList *gfd;
     95 	GIOChannel *gchansock;
     96 	const char *name;
     97 	int nfd;
     98 
     99 	m = webkit_web_page_send_message_to_view_finish(page, r, NULL);
    100 	name = webkit_user_message_get_name(m);
    101 	if (strcmp(name, "surf-pipe") != 0) {
    102 		fprintf(stderr, "webext-surf: Unknown User Reply: %s\n", name);
    103 		return;
    104 	}
    105 
    106 	gfd = webkit_user_message_get_fd_list(m);
    107 	if ((nfd = g_unix_fd_list_get_length(gfd)) != 1) {
    108 		fprintf(stderr, "webext-surf: Too many file-descriptors: %d\n", nfd);
    109 		return;
    110 	}
    111 
    112 	sock = g_unix_fd_list_get(gfd, 0, NULL);
    113 
    114 	gchansock = g_io_channel_unix_new(sock);
    115 	g_io_channel_set_encoding(gchansock, NULL, NULL);
    116 	g_io_channel_set_flags(gchansock, g_io_channel_get_flags(gchansock)
    117 	                       | G_IO_FLAG_NONBLOCK, NULL);
    118 	g_io_channel_set_close_on_unref(gchansock, TRUE);
    119 	g_io_add_watch(gchansock, G_IO_IN, readsock, NULL);
    120 }
    121 
    122 void
    123 pagecreated(WebKitWebExtension *e, WebKitWebPage *p, gpointer unused)
    124 {
    125 	WebKitUserMessage *msg;
    126 
    127 	msg = webkit_user_message_new("page-created", NULL);
    128 	webkit_web_page_send_message_to_view(p, msg, NULL, pageusermessagereply, p);
    129 }
    130 
    131 G_MODULE_EXPORT void
    132 webkit_web_extension_initialize(WebKitWebExtension *e)
    133 {
    134 	webext = e;
    135 
    136 	g_signal_connect(G_OBJECT(e), "page-created",
    137 	                 G_CALLBACK(pagecreated), NULL);
    138 }