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#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <gio/gio.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]))
typedef struct Page {
guint64 id;
WebKitWebPage *webpage;
struct Page *next;
} Page;
static int pipein, pipeout;
static Page *pages;
Page *
newpage(WebKitWebPage *page)
{
Page *p;
if (!(p = calloc(1, sizeof(Page))))
die("Cannot malloc!\n");
p->next = pages;
pages = p;
p->id = webkit_web_page_get_id(page);
p->webpage = page;
return p;
}
static void
msgsurf(Page *p, const char *s)
{
static char msg[MSGBUFSZ];
size_t sln = strlen(s);
int ret;
if ((ret = snprintf(msg, sizeof(msg), "%c%c%s",
2 + sln, p ? p->id : 0, s))
>= sizeof(msg)) {
fprintf(stderr, "webext: message too long: %d\n", ret);
return;
}
if (pipeout && write(pipeout, msg, sizeof(msg)) < 0)
fprintf(stderr, "webext: error sending: %.*s\n", ret-2, msg+2);
}
static gboolean
readpipe(GIOChannel *s, GIOCondition c, gpointer unused)
{
static char msg[MSGBUFSZ], msgsz;
WebKitDOMDOMWindow *view;
GError *gerr = NULL;
glong wh, ww;
Page *p;
if (g_io_channel_read_chars(s, msg, LENGTH(msg), NULL, &gerr) !=
G_IO_STATUS_NORMAL) {
fprintf(stderr, "webext: error reading pipe: %s\n",
gerr->message);
g_error_free(gerr);
return TRUE;
}
if ((msgsz = msg[0]) < 3) {
fprintf(stderr, "webext: message too short: %d\n", msgsz);
return TRUE;
}
for (p = pages; p; p = p->next) {
if (p->id == msg[1])
break;
}
if (!p || !(view = webkit_dom_document_get_default_view(
webkit_web_page_get_dom_document(p->webpage))))
return TRUE;
switch (msg[2]) {
case 'h':
if (msgsz != 4)
return TRUE;
ww = webkit_dom_dom_window_get_inner_width(view);
webkit_dom_dom_window_scroll_by(view,
(ww / 100) * msg[3], 0);
break;
case 'v':
if (msgsz != 4)
return TRUE;
wh = webkit_dom_dom_window_get_inner_height(view);
webkit_dom_dom_window_scroll_by(view,
0, (wh / 100) * msg[3]);
break;
}
return TRUE;
}
static void
webpagecreated(WebKitWebExtension *e, WebKitWebPage *wp, gpointer unused)
{
Page *p = newpage(wp);
}
G_MODULE_EXPORT void
webkit_web_extension_initialize_with_user_data(WebKitWebExtension *e, GVariant *gv)
{
GIOChannel *gchanpipe;
g_signal_connect(e, "page-created", G_CALLBACK(webpagecreated), NULL);
g_variant_get(gv, "(ii)", &pipein, &pipeout);
msgsurf(NULL, "i");
gchanpipe = g_io_channel_unix_new(pipein);
g_io_channel_set_encoding(gchanpipe, NULL, NULL);
g_io_channel_set_close_on_unref(gchanpipe, TRUE);
g_io_add_watch(gchanpipe, G_IO_IN, readpipe, NULL);
}