+#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>
+
+#define LENGTH(x) (sizeof(x) / sizeof(x[0]))
+
+#define MSGBUFSZ 32
+
+typedef struct Page {
+ guint64 id;
+ WebKitWebPage *webpage;
+ WebKitDOMDOMWindow *view;
+ 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)
+{
+ char msg[MSGBUFSZ];
+ int ret;
+
+ msg[0] = p ? p->id : 0;
+ ret = snprintf(&msg[1], sizeof(msg) - 1, "%s", s);
+ if (ret >= sizeof(msg)) {
+ fprintf(stderr, "webext: message too long: %d\n", ret);
+ return;
+ }
+
+ if (pipeout) {
+ if (write(pipeout, msg, sizeof(msg)) < 0)
+ fprintf(stderr, "webext: error sending: %s\n", msg);
+ }
+}
+
+static gboolean
+readpipe(GIOChannel *s, GIOCondition c, gpointer unused)
+{
+ char msg[MSGBUFSZ];
+ gsize msgsz;
+ GError *gerr = NULL;
+ glong wh, ww;
+ Page *p;
+
+ if (g_io_channel_read_chars(s, msg, LENGTH(msg), &msgsz, &gerr) !=
+ G_IO_STATUS_NORMAL) {
+ fprintf(stderr, "webext: error reading pipe: %s\n",
+ gerr->message);
+ g_error_free(gerr);
+ return TRUE;
+ }
+ msg[msgsz] = '\0';
+
+ for (p = pages; p; p = p->next) {
+ if (p->id == msg[0])
+ break;
+ }
+ if (!p || !p->view)
+ return TRUE;
+
+ switch (msg[1]) {
+ case 'h':
+ ww = webkit_dom_dom_window_get_inner_width(p->view);
+ webkit_dom_dom_window_scroll_by(p->view,
+ (ww / 100) * msg[2], 0);
+ break;
+ case 'v':
+ wh = webkit_dom_dom_window_get_inner_height(p->view);
+ webkit_dom_dom_window_scroll_by(p->view,
+ 0, (wh / 100) * msg[2]);
+ break;
+ }
+
+ return TRUE;
+}
+
+static void
+documentloaded(WebKitWebPage *wp, Page *p)
+{
+ p->view = webkit_dom_document_get_default_view(
+ webkit_web_page_get_dom_document(wp));
+}
+
+static void
+webpagecreated(WebKitWebExtension *e, WebKitWebPage *wp, gpointer unused)
+{
+ Page *p = newpage(wp);
+
+ g_signal_connect(wp, "document-loaded", G_CALLBACK(documentloaded), p);
+}
G_MODULE_EXPORT void
-webkit_web_extension_initialize(WebKitWebExtension *e)
+webkit_web_extension_initialize_with_user_data(WebKitWebExtension *e, GVariant *gv)
{
- return;
+ 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);
}
