Adblocker: get html-elements with javascript function

--HG--
branch : experimental

1 files changed, 62 insertions, 0 deletions

diff --git a/src/js.c b/src/js.c
new file mode 100644
index 00000000..34cf39dc
--- /dev/null
+++ b/src/js.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2010-2011 Stefan Bolte <portix@gmx.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <JavaScriptCore/JavaScript.h>
+#include <webkit/webkit.h>
+#include <glib-2.0/glib.h>
+
+
+void
+js_create_callback(WebKitWebFrame *frame, const char *name, JSObjectCallAsFunctionCallback function) {
+  JSContextRef ctx = webkit_web_frame_get_global_context(frame);
+  JSStringRef jsname = JSStringCreateWithUTF8CString(name);
+  JSObjectRef jsfunction = JSObjectMakeFunctionWithCallback(ctx, jsname, function);
+  JSObjectSetProperty(ctx, JSContextGetGlobalObject(ctx), jsname, jsfunction, 
+      kJSPropertyAttributeDontDelete | kJSPropertyAttributeReadOnly, NULL);
+  JSStringRelease(jsname);
+}
+
+/* js_string_to_char 
+ * Converts a JSStringRef, return a newly allocated char.
+ * {{{*/
+char *
+js_string_to_char(JSContextRef ctx, JSStringRef jsstring) {
+  size_t length = JSStringGetLength(jsstring) + 1;
+
+  char *ret = g_new(char, length);
+  size_t written = JSStringGetUTF8CString(jsstring, ret, length);
+    /* TODO: handle length error */
+  if (written != length)
+    return NULL;
+  return ret;
+}/*}}}*/
+
+/*{{{*/
+char *
+js_value_to_char(JSContextRef ctx, JSValueRef value) {
+  JSValueRef exc = NULL;
+  if (! JSValueIsString(ctx, value)) 
+    return NULL;
+  JSStringRef jsstring = JSValueToStringCopy(ctx, value, &exc);
+  if (exc != NULL) 
+    return NULL;
+
+  char *ret = js_string_to_char(ctx, jsstring);
+  JSStringRelease(jsstring);
+  return ret;
+}/*}}}*/