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#include <sys/socket.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <gio/gio.h>
#include <gio/gunixfdlist.h>
#include <webkit2/webkit-web-extension.h>
#include <webkitdom/webkitdom.h>
#include <webkitdom/WebKitDOMDOMWindowUnstable.h>
#include "common.h"
#define LENGTH(x) (sizeof(x) / sizeof(x[0]))
static WebKitWebExtension *webext;
static int sock;
/*
* Return:
* 0 No data processed: need more data
* > 0 Amount of data processed or discarded
*/
static size_t
evalmsg(char *msg, size_t sz)
{
char js[48];
WebKitWebPage *page;
JSCContext *jsc;
JSCValue *jsv;
if (!(page = webkit_web_extension_get_page(webext, msg[0])))
return sz;
if (sz < 2)
return 0;
jsc = webkit_frame_get_js_context(webkit_web_page_get_main_frame(page));
jsv = NULL;
switch (msg[1]) {
case 'h':
if (sz < 3) {
sz = 0;
break;
}
sz = 3;
snprintf(js, sizeof(js),
"window.scrollBy(window.innerWidth/100*%hhd,0);",
msg[2]);
jsv = jsc_context_evaluate(jsc, js, -1);
break;
case 'v':
if (sz < 3) {
sz = 0;
break;
}
sz = 3;
snprintf(js, sizeof(js),
"window.scrollBy(0,window.innerHeight/100*%hhd);",
msg[2]);
jsv = jsc_context_evaluate(jsc, js, -1);
break;
default:
fprintf(stderr, "%s:%d:evalmsg: unknown cmd(%zu): '%#x'\n",
__FILE__, __LINE__, sz, msg[1]);
}
g_object_unref(jsc);
if (jsv)
g_object_unref(jsv);
return sz;
}
static gboolean
readsock(GIOChannel *s, GIOCondition c, gpointer unused)
{
static char msg[MSGBUFSZ];
static size_t msgoff;
GError *gerr = NULL;
size_t sz;
gsize rsz;
if (g_io_channel_read_chars(s, msg+msgoff, sizeof(msg)-msgoff, &rsz, &gerr) !=
G_IO_STATUS_NORMAL) {
if (gerr) {
fprintf(stderr, "webext: error reading socket: %s\n",
gerr->message);
g_error_free(gerr);
}
return TRUE;
}
if (msgoff >= sizeof(msg)) {
fprintf(stderr, "%s:%d:%s: msgoff: %zu", __FILE__, __LINE__, __func__, msgoff);
return FALSE;
}
for (rsz += msgoff; rsz; rsz -= sz) {
sz = evalmsg(msg, rsz);
if (sz == 0) {
/* need more data */
break;
}
if (sz != rsz) {
/* continue processing message */
memmove(msg, msg+sz, rsz-sz);
}
}
msgoff = rsz;
return TRUE;
}
static void
pageusermessagereply(GObject *o, GAsyncResult *r, gpointer page)
{
WebKitUserMessage *m;
GUnixFDList *gfd;
GIOChannel *gchansock;
const char *name;
int nfd;
m = webkit_web_page_send_message_to_view_finish(page, r, NULL);
name = webkit_user_message_get_name(m);
if (strcmp(name, "surf-pipe") != 0) {
fprintf(stderr, "webext-surf: Unknown User Reply: %s\n", name);
return;
}
gfd = webkit_user_message_get_fd_list(m);
if ((nfd = g_unix_fd_list_get_length(gfd)) != 1) {
fprintf(stderr, "webext-surf: Too many file-descriptors: %d\n", nfd);
return;
}
sock = g_unix_fd_list_get(gfd, 0, NULL);
gchansock = g_io_channel_unix_new(sock);
g_io_channel_set_encoding(gchansock, NULL, NULL);
g_io_channel_set_flags(gchansock, g_io_channel_get_flags(gchansock)
| G_IO_FLAG_NONBLOCK, NULL);
g_io_channel_set_close_on_unref(gchansock, TRUE);
g_io_add_watch(gchansock, G_IO_IN, readsock, NULL);
}
void
pagecreated(WebKitWebExtension *e, WebKitWebPage *p, gpointer unused)
{
WebKitUserMessage *msg;
msg = webkit_user_message_new("page-created", NULL);
webkit_web_page_send_message_to_view(p, msg, NULL, pageusermessagereply, p);
}
G_MODULE_EXPORT void
webkit_web_extension_initialize(WebKitWebExtension *e)
{
webext = e;
g_signal_connect(G_OBJECT(e), "page-created",
G_CALLBACK(pagecreated), NULL);
}
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