From 3164edd96b759a04eedb099ffab593c2a6251abe Mon Sep 17 00:00:00 2001
From: Bradley Taunt <bt@btxx.org>
Date: Thu, 18 Jan 2024 12:59:27 -0500
Subject: Initial commit on new cgit platform

---
 webext-surf.c | 138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 webext-surf.c

(limited to 'webext-surf.c')

diff --git a/webext-surf.c b/webext-surf.c
new file mode 100644
index 0000000..69fd04b
--- /dev/null
+++ b/webext-surf.c
@@ -0,0 +1,138 @@
+#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 <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;
+
+static void
+msgsurf(guint64 pageid, const char *s)
+{
+	static char msg[MSGBUFSZ];
+	size_t sln = strlen(s);
+	int ret;
+
+	if ((ret = snprintf(msg, sizeof(msg), "%c%s", pageid, s))
+	    >= sizeof(msg)) {
+		fprintf(stderr, "webext: msg: message too long: %d\n", ret);
+		return;
+	}
+
+	if (send(sock, msg, ret, 0) < 0)
+		fprintf(stderr, "webext: error sending: %s\n", msg+1);
+}
+
+static gboolean
+readsock(GIOChannel *s, GIOCondition c, gpointer unused)
+{
+	static char js[48], msg[MSGBUFSZ];
+	WebKitWebPage *page;
+	JSCContext *jsc;
+	GError *gerr = NULL;
+	gsize msgsz;
+
+	if (g_io_channel_read_chars(s, msg, sizeof(msg), &msgsz, &gerr) !=
+	    G_IO_STATUS_NORMAL) {
+		if (gerr) {
+			fprintf(stderr, "webext: error reading socket: %s\n",
+			        gerr->message);
+			g_error_free(gerr);
+		}
+		return TRUE;
+	}
+
+	if (msgsz < 2) {
+		fprintf(stderr, "webext: readsock: message too short: %d\n",
+		        msgsz);
+		return TRUE;
+	}
+
+	if (!(page = webkit_web_extension_get_page(webext, msg[0])))
+		return TRUE;
+
+	jsc = webkit_frame_get_js_context(webkit_web_page_get_main_frame(page));
+
+	switch (msg[1]) {
+	case 'h':
+		if (msgsz != 3)
+			return TRUE;
+		snprintf(js, sizeof(js),
+		         "window.scrollBy(window.innerWidth/100*%d,0);",
+		         msg[2]);
+		jsc_context_evaluate(jsc, js, -1);
+		break;
+	case 'v':
+		if (msgsz != 3)
+			return TRUE;
+		snprintf(js, sizeof(js),
+		         "window.scrollBy(0,window.innerHeight/100*%d);",
+		         msg[2]);
+		jsc_context_evaluate(jsc, js, -1);
+		break;
+	}
+
+	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);
+}
-- 
cgit v1.2.3-54-g00ecf