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// Copyright (c) 2011 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 "content/renderer/intents_dispatcher.h"
#include "content/common/intents_messages.h"
#include "ipc/ipc_message.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebBindings.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSerializedScriptValue.h"
#include "v8/include/v8.h"
#include "webkit/glue/cpp_bound_class.h"
using WebKit::WebCString;
using WebKit::WebString;
// This class encapsulates the API the Intent object will expose to Javascript.
// It is made available to the Javascript runtime in the service page using
// NPAPI methods as with plugin/Javascript interaction objects and other
// browser-provided Javascript API objects on |window|.
class IntentsDispatcher::BoundDeliveredIntent : public CppBoundClass {
public:
BoundDeliveredIntent(const string16& action,
const string16& type,
const string16& data,
IntentsDispatcher* parent,
WebKit::WebFrame* frame) {
action_ = WebString(action).utf8();
type_ = WebString(type).utf8();
parent_ = parent;
v8::HandleScope scope;
v8::Local<v8::Context> ctx = frame->mainWorldScriptContext();
v8::Context::Scope cscope(ctx);
WebKit::WebSerializedScriptValue ssv =
WebKit::WebSerializedScriptValue::fromString(WebString(data));
// TODO(gbillock): use an exception handler instead? Need to
// pass back error state to caller? This is a pretty unexpected
// internal error...
CHECK(!ssv.isNull());
v8::Local<v8::Value> data_obj =
v8::Local<v8::Value>::New(ssv.deserialize());
data_val_.reset(new CppVariant);
WebKit::WebBindings::toNPVariant(data_obj,
frame->windowObject(),
data_val_.get());
BindProperty("action", &BoundDeliveredIntent::getAction);
BindProperty("type", &BoundDeliveredIntent::getType);
BindProperty("data", &BoundDeliveredIntent::getData);
BindMethod("postResult", &BoundDeliveredIntent::postResult);
BindMethod("postFailure", &BoundDeliveredIntent::postFailure);
}
virtual ~BoundDeliveredIntent() {
}
WebKit::WebString SerializeCppVariant(const CppVariant& val) {
v8::HandleScope scope;
v8::Handle<v8::Value> v8obj = WebKit::WebBindings::toV8Value(&val);
WebKit::WebSerializedScriptValue ssv =
WebKit::WebSerializedScriptValue::serialize(v8obj);
if (ssv.isNull())
return WebKit::WebString();
return ssv.toString();
}
void postResult(const CppArgumentList& args, CppVariant* retval) {
if (args.size() != 1) {
WebKit::WebBindings::setException(
NULL, "Must pass one argument to postResult");
return;
}
WebString str = SerializeCppVariant(args[0]);
parent_->OnResult(str);
}
void postFailure(const CppArgumentList& args, CppVariant* retval) {
if (args.size() != 1) {
WebKit::WebBindings::setException(
NULL, "Must pass one argument to postFailure");
return;
}
WebString str = SerializeCppVariant(args[0]);
parent_->OnFailure(str);
}
void getAction(CppVariant* result) {
std::string action;
action.assign(action_.data(), action_.length());
result->Set(action);
}
void getType(CppVariant* result) {
std::string type;
type.assign(type_.data(), type_.length());
result->Set(type);
}
void getData(CppVariant* result) {
result->Set(*data_val_.get());
}
private:
// Intent data suitable for surfacing to Javascript callers.
WebCString action_;
WebCString type_;
scoped_ptr<CppVariant> data_val_;
// The dispatcher object, for forwarding postResult/postFailure calls.
IntentsDispatcher* parent_;
};
IntentsDispatcher::IntentsDispatcher(RenderView* render_view)
: content::RenderViewObserver(render_view),
intent_id_(0) {
}
IntentsDispatcher::~IntentsDispatcher() {}
bool IntentsDispatcher::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(IntentsDispatcher, message)
IPC_MESSAGE_HANDLER(IntentsMsg_SetWebIntentData, OnSetIntent)
IPC_MESSAGE_HANDLER(IntentsMsg_WebIntentReply, OnWebIntentReply);
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void IntentsDispatcher::OnSetIntent(const webkit_glue::WebIntentData& intent,
int intent_id) {
intent_.reset(new webkit_glue::WebIntentData(intent));
intent_id_ = intent_id;
}
void IntentsDispatcher::OnWebIntentReply(
webkit_glue::WebIntentReplyType reply_type,
const WebKit::WebString& data,
int intent_id) {
LOG(INFO) << "RenderView got reply to intent type " << reply_type;
}
void IntentsDispatcher::OnResult(const WebKit::WebString& data) {
Send(new IntentsMsg_WebIntentReply(
routing_id(),
webkit_glue::WEB_INTENT_REPLY_SUCCESS,
data,
intent_id_));
}
void IntentsDispatcher::OnFailure(const WebKit::WebString& data) {
Send(new IntentsMsg_WebIntentReply(
routing_id(),
webkit_glue::WEB_INTENT_REPLY_FAILURE,
data,
intent_id_));
}
// We set the intent payload into all top-level frame window objects. This
// should persist the data through redirects, and not deliver it to any
// sub-frames. TODO(gbillock): This policy needs to be fine-tuned and
// documented.
void IntentsDispatcher::DidClearWindowObject(WebKit::WebFrame* frame) {
if (intent_.get() == NULL || frame->top() != frame)
return;
delivered_intent_.reset(new BoundDeliveredIntent(
intent_->action, intent_->type, intent_->data, this, frame));
delivered_intent_->BindToJavascript(frame, "intent");
}
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