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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/extensions/renderer_extension_bindings.h"
#include "base/basictypes.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/resource_bundle.h"
#include "chrome/renderer/extensions/bindings_utils.h"
#include "chrome/renderer/extensions/event_bindings.h"
#include "chrome/renderer/render_thread.h"
#include "grit/renderer_resources.h"
// Message passing API example (in a content script):
// var extension =
// new chromium.Extension('00123456789abcdef0123456789abcdef0123456');
// var port = extension.connect();
// port.postMessage('Can you hear me now?');
// port.onmessage.addListener(function(msg, port) {
// alert('response=' + msg);
// port.postMessage('I got your reponse');
// });
namespace {
// We use the generic interface so that unit tests can inject a mock.
RenderThreadBase* render_thread_ = NULL;
const char* kExtensionName = "v8/RendererExtensionBindings";
const char* kExtensionDeps[] = { EventBindings::kName };
class ExtensionImpl : public v8::Extension {
public:
ExtensionImpl()
: v8::Extension(kExtensionName,
GetStringResource<IDR_RENDERER_EXTENSION_BINDINGS_JS>(),
arraysize(kExtensionDeps), kExtensionDeps) {
}
~ExtensionImpl() {}
virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
v8::Handle<v8::String> name) {
if (name->Equals(v8::String::New("OpenChannelToExtension"))) {
return v8::FunctionTemplate::New(OpenChannelToExtension);
} else if (name->Equals(v8::String::New("PostMessage"))) {
return v8::FunctionTemplate::New(PostMessage);
}
return v8::Handle<v8::FunctionTemplate>();
}
// Creates a new messaging channel to the given extension.
static v8::Handle<v8::Value> OpenChannelToExtension(
const v8::Arguments& args) {
if (args.Length() >= 1 && args[0]->IsString()) {
std::string id = *v8::String::Utf8Value(args[0]->ToString());
int port_id = -1;
render_thread_->Send(
new ViewHostMsg_OpenChannelToExtension(id, &port_id));
return v8::Integer::New(port_id);
}
return v8::Undefined();
}
// Sends a message along the given channel.
static v8::Handle<v8::Value> PostMessage(const v8::Arguments& args) {
if (args.Length() >= 2 && args[0]->IsInt32() && args[1]->IsString()) {
int port_id = args[0]->Int32Value();
std::string message = *v8::String::Utf8Value(args[1]->ToString());
render_thread_->Send(
new ViewHostMsg_ExtensionPostMessage(port_id, message));
}
return v8::Undefined();
}
};
} // namespace
namespace extensions_v8 {
v8::Extension* RendererExtensionBindings::Get(RenderThreadBase* render_thread) {
render_thread_ = render_thread;
return new ExtensionImpl();
}
void RendererExtensionBindings::HandleConnect(int port_id) {
v8::HandleScope handle_scope;
v8::Handle<v8::Value> argv[1];
argv[0] = v8::Integer::New(port_id);
EventBindings::CallFunction("chromium.Port.dispatchOnConnect_",
arraysize(argv), argv);
}
void RendererExtensionBindings::HandleMessage(const std::string& message,
int port_id) {
v8::HandleScope handle_scope;
v8::Handle<v8::Value> argv[2];
argv[0] = v8::String::New(message.c_str());
argv[1] = v8::Integer::New(port_id);
EventBindings::CallFunction("chromium.Port.dispatchOnMessage_",
arraysize(argv), argv);
}
} // namespace extensions_v8
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