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.cpp

@@ -0,0 +1,143 @@
+/*
+ * weechat-js-v8.c - v8 javascript functions
+ *
+ * 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/>.
+ */
+
+#undef _
+#include <cstdio>
+
+extern "C"
+{
+#include "../weechat-plugin.h"
+#include "../plugin-script.h"
+}
+
+#include "weechat-js.h"
+#include "weechat-js-v8.h"
+
+using namespace v8;
+
+
+/*
+ * Constructor.
+ */
+
+WeechatJsV8::WeechatJsV8()
+{
+    this->global = ObjectTemplate::New();
+}
+
+/*
+ * Destructor.
+ */
+
+WeechatJsV8::~WeechatJsV8()
+{
+    this->context.Dispose();
+}
+
+/*
+ * Loads a javascript script.
+ */
+
+bool
+WeechatJsV8::load(Handle<String> source)
+{
+    this->source = source;
+
+    return true;
+}
+
+/*
+ * Loads a javascript script.
+ */
+
+bool
+WeechatJsV8::load(const char *source)
+{
+    Handle<String> src = String::New(source);
+
+    return this->load(src);
+}
+
+/*
+ * Executes a javascript script.
+ */
+
+bool
+WeechatJsV8::execScript()
+{
+    this->context = Context::New(NULL, this->global);
+    Context::Scope context_scope(this->context);
+    Handle<Script> script = Script::Compile(this->source);
+
+    script->Run();
+
+    return true;
+}
+
+/*
+ * Checks if a function with given name exists in script.
+ */
+
+bool
+WeechatJsV8::functionExists(const char *function)
+{
+    Context::Scope context_scope(this->context);
+
+    Handle<Object> global = this->context->Global();
+    Handle<Value> value = global->Get(String::New(function));
+    return value->IsFunction();
+}
+
+/*
+ * Executes a function in a javascript script.
+ */
+
+Handle<Value>
+WeechatJsV8::execFunction(const char *function, int argc, Handle<Value> *argv)
+{
+    Context::Scope context_scope(this->context);
+
+    Handle<Object> global = this->context->Global();
+    Handle<Value> value = global->Get(String::New(function));
+    Handle<Function> func = Handle<Function>::Cast(value);
+    return func->Call(global, argc, argv);
+}
+
+/*
+ * Sets something in the global.
+ */
+
+void
+WeechatJsV8::addGlobal(Handle<String> key, Handle<Template> val)
+{
+    this->global->Set(key, val);
+}
+
+/*
+ * Sets something in the global.
+ */
+
+void
+WeechatJsV8::addGlobal(const char *key, Handle<Template> val)
+{
+    this->addGlobal(String::New(key), val);
+}