javascript: add new plugin to run javascript scripts in WeeChat

This plugin was originally written by Koka El Kiwi
(repository: https://github.com/KokaKiwi/weechat-js-plugin).

This plugin uses Google V8 engine to execute JS scripts.

src/plugins/javascript/weechat-js-v8.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2013 Koka El Kiwi <admin@kokabsolu.com>
+ * Copyright (C) 2015 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat 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.
+ *
+ * WeeChat 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 WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef WEECHAT_JS_V8_H
+#define WEECHAT_JS_V8_H 1
+
+#include <cstdio>
+#include <v8.h>
+
+class WeechatJsV8
+{
+public:
+    WeechatJsV8(void);
+    ~WeechatJsV8(void);
+
+    bool load(v8::Handle<v8::String>);
+    bool load(const char *);
+
+    bool execScript(void);
+    bool functionExists(const char *);
+    v8::Handle<v8::Value> execFunction(const char *,
+                                       int argc, v8::Handle<v8::Value> *);
+
+    void addGlobal(v8::Handle<v8::String>, v8::Handle<v8::Template>);
+    void addGlobal(const char *, v8::Handle<v8::Template>);
+
+    void loadLibs(void);
+
+private:
+    v8::HandleScope handle_scope;
+    v8::Handle<v8::ObjectTemplate> global;
+    v8::Persistent<Context> context;
+
+    v8::Handle<v8::String> source;
+};
+
+#endif /* WEECHAT_JS_V8_H */