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// Copyright (c) 2012 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/web_intents_host.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/utf_string_conversions.h"
#include "content/common/intents_messages.h"
#include "content/renderer/render_view_impl.h"
#include "ipc/ipc_message.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebBindings.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebBlob.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIntentRequest.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSerializedScriptValue.h"
#include "v8/include/v8.h"
#include "webkit/glue/cpp_bound_class.h"
using WebKit::WebBindings;
using WebKit::WebBlob;
using WebKit::WebCString;
using WebKit::WebFrame;
using WebKit::WebIntentRequest;
using WebKit::WebString;
using WebKit::WebSerializedScriptValue;
// 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 WebIntentsHost::BoundDeliveredIntent : public CppBoundClass {
public:
BoundDeliveredIntent(const webkit_glue::WebIntentData& intent,
WebIntentsHost* parent,
WebFrame* frame) {
action_ = WebString(intent.action).utf8();
type_ = WebString(intent.type).utf8();
extra_data_ = intent.extra_data;
parent_ = parent;
v8::HandleScope scope;
v8::Local<v8::Context> ctx = frame->mainWorldScriptContext();
v8::Context::Scope cscope(ctx);
v8::Local<v8::Value> data_obj;
if (intent.data_type == webkit_glue::WebIntentData::SERIALIZED) {
WebSerializedScriptValue ssv =
WebSerializedScriptValue::fromString(WebString(intent.data));
DCHECK(!ssv.isNull());
data_obj = v8::Local<v8::Value>::New(ssv.deserialize());
} else if (intent.data_type == webkit_glue::WebIntentData::UNSERIALIZED) {
data_obj = v8::String::New(
reinterpret_cast<const uint16_t*>(intent.unserialized_data.data()),
static_cast<int>(intent.unserialized_data.length()));
} else {
DCHECK(intent.data_type == webkit_glue::WebIntentData::BLOB);
web_blob_ = WebBlob::createFromFile(
WebString::fromUTF8(intent.blob_file.AsUTF8Unsafe()),
intent.blob_length);
data_obj = v8::Local<v8::Value>::New(web_blob_.toV8Value());
}
data_val_.reset(new CppVariant);
WebBindings::toNPVariant(data_obj, frame->windowObject(), data_val_.get());
BindGetterCallback("action", base::Bind(&BoundDeliveredIntent::GetAction,
base::Unretained(this)));
BindGetterCallback("type", base::Bind(&BoundDeliveredIntent::GetType,
base::Unretained(this)));
BindGetterCallback("data", base::Bind(&BoundDeliveredIntent::GetData,
base::Unretained(this)));
BindCallback("getExtra", base::Bind(&BoundDeliveredIntent::GetExtra,
base::Unretained(this)));
BindCallback("postResult", base::Bind(&BoundDeliveredIntent::PostResult,
base::Unretained(this)));
BindCallback("postFailure", base::Bind(&BoundDeliveredIntent::PostFailure,
base::Unretained(this)));
}
virtual ~BoundDeliveredIntent() {
}
WebString SerializeCppVariant(const CppVariant& val) {
v8::HandleScope scope;
v8::Handle<v8::Value> v8obj = WebBindings::toV8Value(&val);
WebSerializedScriptValue ssv =
WebSerializedScriptValue::serialize(v8obj);
if (ssv.isNull())
return WebKit::WebString();
return ssv.toString();
}
void PostResult(const CppArgumentList& args, CppVariant* retval) {
if (args.size() != 1) {
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) {
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());
}
void GetExtra(const CppArgumentList& args, CppVariant* result) {
if (args.size() != 1) {
WebBindings::setException(NULL, "Must pass one argument to getExtra");
return;
}
if (!args[0].isString()) {
WebBindings::setException(NULL, "Argument to getExtra must be a string");
return;
}
std::string str = args[0].ToString();
std::map<string16, string16>::const_iterator iter =
extra_data_.find(UTF8ToUTF16(str));
if (iter == extra_data_.end()) {
result->SetNull();
return;
}
std::string val = UTF16ToUTF8(iter->second);
result->Set(val);
}
private:
// Intent data suitable for surfacing to Javascript callers.
WebCString action_;
WebCString type_;
std::map<string16, string16> extra_data_;
WebBlob web_blob_;
scoped_ptr<CppVariant> data_val_;
// The dispatcher object, for forwarding postResult/postFailure calls.
WebIntentsHost* parent_;
};
WebIntentsHost::WebIntentsHost(RenderViewImpl* render_view)
: content::RenderViewObserver(render_view),
id_counter_(0) {
}
WebIntentsHost::~WebIntentsHost() {
}
int WebIntentsHost::RegisterWebIntent(
const WebIntentRequest& request) {
int id = id_counter_++;
intent_requests_[id] = request;
return id;
}
bool WebIntentsHost::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(WebIntentsHost, 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 WebIntentsHost::OnSetIntent(const webkit_glue::WebIntentData& intent) {
intent_.reset(new webkit_glue::WebIntentData(intent));
}
void WebIntentsHost::OnWebIntentReply(
webkit_glue::WebIntentReplyType reply_type,
const WebKit::WebString& data,
int intent_id) {
std::map<int, WebIntentRequest>::iterator request =
intent_requests_.find(intent_id);
if (request == intent_requests_.end())
return;
WebIntentRequest intent_request = request->second;
intent_requests_.erase(request);
WebSerializedScriptValue value =
WebSerializedScriptValue::fromString(data);
if (reply_type == webkit_glue::WEB_INTENT_REPLY_SUCCESS) {
intent_request.postResult(value);
} else {
intent_request.postFailure(value);
}
}
void WebIntentsHost::OnResult(const WebKit::WebString& data) {
Send(new IntentsHostMsg_WebIntentReply(
routing_id(), webkit_glue::WEB_INTENT_REPLY_SUCCESS, data));
}
void WebIntentsHost::OnFailure(const WebKit::WebString& data) {
Send(new IntentsHostMsg_WebIntentReply(
routing_id(), webkit_glue::WEB_INTENT_REPLY_FAILURE, data));
}
// 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 WebIntentsHost::DidClearWindowObject(WebFrame* frame) {
if (intent_.get() == NULL || frame->top() != frame)
return;
if (!delivered_intent_.get()) {
delivered_intent_.reset(
new BoundDeliveredIntent(*(intent_.get()), this, frame));
}
delivered_intent_->BindToJavascript(frame, "webkitIntent");
}
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