// 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.

// This file is used to define IPC::ParamTraits<> specializations for a number
// of types so that they can be serialized over IPC.  IPC::ParamTraits<>
// specializations for basic types (like int and std::string) and types in the
// 'base' project can be found in ipc/ipc_message_utils.h.  This file contains
// specializations for types that are used by the content code, and which need
// manual serialization code.  This is usually because they're not structs with
// public members..

#ifndef CONTENT_COMMON_COMMON_PARAM_TRAITS_H_
#define CONTENT_COMMON_COMMON_PARAM_TRAITS_H_
#pragma once

#include "app/surface/transport_dib.h"
#include "base/platform_file.h"
#include "base/ref_counted.h"
#include "base/string_number_conversions.h"
#include "googleurl/src/gurl.h"
#include "ipc/ipc_message_utils.h"
#include "net/base/ip_endpoint.h"
#include "net/url_request/url_request_status.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "ui/gfx/native_widget_types.h"
#include "webkit/blob/blob_data.h"
#include "webkit/glue/npruntime_util.h"
#include "webkit/glue/resource_type.h"
#include "webkit/glue/webcursor.h"

namespace gfx {
class Point;
class Rect;
class Size;
}  // namespace gfx

namespace net {
class HttpResponseHeaders;
class HostPortPair;
class UploadData;
}

namespace webkit_glue {
struct ResourceDevToolsInfo;
struct ResourceLoadTimingInfo;
}

// Define the NPVariant_Param struct and its enum here since it needs manual
// serialization code.
enum NPVariant_ParamEnum {
  NPVARIANT_PARAM_VOID,
  NPVARIANT_PARAM_NULL,
  NPVARIANT_PARAM_BOOL,
  NPVARIANT_PARAM_INT,
  NPVARIANT_PARAM_DOUBLE,
  NPVARIANT_PARAM_STRING,
  // Used when when the NPObject is running in the caller's process, so we
  // create an NPObjectProxy in the other process.
  NPVARIANT_PARAM_SENDER_OBJECT_ROUTING_ID,
  // Used when the NPObject we're sending is running in the callee's process
  // (i.e. we have an NPObjectProxy for it).  In that case we want the callee
  // to just use the raw pointer.
  NPVARIANT_PARAM_RECEIVER_OBJECT_ROUTING_ID,
};

struct NPVariant_Param {
  NPVariant_Param();
  ~NPVariant_Param();

  NPVariant_ParamEnum type;
  bool bool_value;
  int int_value;
  double double_value;
  std::string string_value;
  int npobject_routing_id;
};

struct NPIdentifier_Param {
  NPIdentifier_Param();
  ~NPIdentifier_Param();

  NPIdentifier identifier;
};

namespace IPC {

template <>
struct ParamTraits<GURL> {
  typedef GURL param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* p);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<ResourceType::Type> {
  typedef ResourceType::Type param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* p);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<net::URLRequestStatus> {
  typedef net::URLRequestStatus param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<scoped_refptr<net::UploadData> > {
  typedef scoped_refptr<net::UploadData> param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template<>
struct ParamTraits<net::HostPortPair> {
  typedef net::HostPortPair param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<scoped_refptr<net::HttpResponseHeaders> > {
  typedef scoped_refptr<net::HttpResponseHeaders> param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<net::IPEndPoint> {
  typedef net::IPEndPoint param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* p);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<webkit_glue::ResourceLoadTimingInfo> {
  typedef webkit_glue::ResourceLoadTimingInfo param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<scoped_refptr<webkit_glue::ResourceDevToolsInfo> > {
  typedef scoped_refptr<webkit_glue::ResourceDevToolsInfo> param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<base::PlatformFileInfo> {
  typedef base::PlatformFileInfo param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct SimilarTypeTraits<base::PlatformFileError> {
  typedef int Type;
};

template <>
struct ParamTraits<gfx::Point> {
  typedef gfx::Point param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<gfx::Size> {
  typedef gfx::Size param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<gfx::Rect> {
  typedef gfx::Rect param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<gfx::NativeWindow> {
  typedef gfx::NativeWindow param_type;
  static void Write(Message* m, const param_type& p) {
#if defined(OS_WIN)
    // HWNDs are always 32 bits on Windows, even on 64 bit systems.
    m->WriteUInt32(reinterpret_cast<uint32>(p));
#else
    m->WriteData(reinterpret_cast<const char*>(&p), sizeof(p));
#endif
  }
  static bool Read(const Message* m, void** iter, param_type* r) {
#if defined(OS_WIN)
    return m->ReadUInt32(iter, reinterpret_cast<uint32*>(r));
#else
    const char *data;
    int data_size = 0;
    bool result = m->ReadData(iter, &data, &data_size);
    if (result && data_size == sizeof(gfx::NativeWindow)) {
      memcpy(r, data, sizeof(gfx::NativeWindow));
    } else {
      result = false;
      NOTREACHED();
    }
    return result;
#endif
  }
  static void Log(const param_type& p, std::string* l) {
    l->append("<gfx::NativeWindow>");
  }
};

template <>
struct ParamTraits<scoped_refptr<webkit_blob::BlobData > > {
  typedef scoped_refptr<webkit_blob::BlobData> param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<NPVariant_Param> {
  typedef NPVariant_Param param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<NPIdentifier_Param> {
  typedef NPIdentifier_Param param_type;
  static void Write(Message* m, const param_type& p);
  static bool Read(const Message* m, void** iter, param_type* r);
  static void Log(const param_type& p, std::string* l);
};

template <>
struct ParamTraits<WebCursor> {
  typedef WebCursor param_type;
  static void Write(Message* m, const param_type& p) {
    p.Serialize(m);
  }
  static bool Read(const Message* m, void** iter, param_type* r)  {
    return r->Deserialize(m, iter);
  }
  static void Log(const param_type& p, std::string* l) {
    l->append("<WebCursor>");
  }
};


template <>
struct ParamTraits<WebKit::WebInputEvent::Type> {
  typedef WebKit::WebInputEvent::Type param_type;
  static void Write(Message* m, const param_type& p) {
    m->WriteInt(p);
  }
  static bool Read(const Message* m, void** iter, param_type* p) {
    int type;
    if (!m->ReadInt(iter, &type))
      return false;
    *p = static_cast<WebKit::WebInputEvent::Type>(type);
    return true;
  }
  static void Log(const param_type& p, std::string* l) {
    const char* type;
    switch (p) {
     case WebKit::WebInputEvent::MouseDown:
      type = "MouseDown";
      break;
     case WebKit::WebInputEvent::MouseUp:
      type = "MouseUp";
      break;
     case WebKit::WebInputEvent::MouseMove:
      type = "MouseMove";
      break;
     case WebKit::WebInputEvent::MouseLeave:
      type = "MouseLeave";
      break;
     case WebKit::WebInputEvent::MouseEnter:
      type = "MouseEnter";
      break;
     case WebKit::WebInputEvent::MouseWheel:
      type = "MouseWheel";
      break;
     case WebKit::WebInputEvent::RawKeyDown:
      type = "RawKeyDown";
      break;
     case WebKit::WebInputEvent::KeyDown:
      type = "KeyDown";
      break;
     case WebKit::WebInputEvent::KeyUp:
      type = "KeyUp";
      break;
     default:
      type = "None";
      break;
    }
    LogParam(std::string(type), l);
  }
};

typedef const WebKit::WebInputEvent* WebInputEventPointer;
template <>
struct ParamTraits<WebInputEventPointer> {
  typedef WebInputEventPointer param_type;
  static void Write(Message* m, const param_type& p) {
    m->WriteData(reinterpret_cast<const char*>(p), p->size);
  }
  // Note: upon read, the event has the lifetime of the message.
  static bool Read(const Message* m, void** iter, param_type* r) {
    const char* data;
    int data_length;
    if (!m->ReadData(iter, &data, &data_length)) {
      NOTREACHED();
      return false;
    }
    if (data_length < static_cast<int>(sizeof(WebKit::WebInputEvent))) {
      NOTREACHED();
      return false;
    }
    param_type event = reinterpret_cast<param_type>(data);
    // Check that the data size matches that of the event (we check the latter
    // in the delegate).
    if (data_length != static_cast<int>(event->size)) {
      NOTREACHED();
      return false;
    }
    *r = event;
    return true;
  }
  static void Log(const param_type& p, std::string* l) {
    l->append("(");
    LogParam(p->size, l);
    l->append(", ");
    LogParam(p->type, l);
    l->append(", ");
    LogParam(p->timeStampSeconds, l);
    l->append(")");
  }
};

#if defined(OS_WIN)
template<>
struct ParamTraits<TransportDIB::Id> {
  typedef TransportDIB::Id param_type;
  static void Write(Message* m, const param_type& p) {
    WriteParam(m, p.handle);
    WriteParam(m, p.sequence_num);
  }
  static bool Read(const Message* m, void** iter, param_type* r) {
    return (ReadParam(m, iter, &r->handle) &&
            ReadParam(m, iter, &r->sequence_num));
  }
  static void Log(const param_type& p, std::string* l) {
    l->append("TransportDIB(");
    LogParam(p.handle, l);
    l->append(", ");
    LogParam(p.sequence_num, l);
    l->append(")");
  }
};
#endif

}  // namespace IPC

#endif  // CONTENT_COMMON_COMMON_PARAM_TRAITS_H_