Split the IPC code into ipc/

This splits the ipc code from the common project.  The 'common' project pulls in
all of webkit, the v8 bindings, skia, googleurl, and a number of other projects
which makes it very difficult to deal with especially for external projects
wanting just to use some of Chromium's infrastructure.  This puts the ipc code
into its top-level ipc/ directory with a dependency only on base.  The common
project depends on the new ipc/ipc.gyp:ipc target so that all projects currently
pulling common in to get the IPC code still have it available.  This mostly
follows agl's pre-gyp attempt to do this which was r13062.

Known issues:
- Currently a number of projects depend on chrome/chrome.gyp:common in order to
use the IPC infrastructure.  Rather than fixing all of these dependencies I have
made common depend on ipc/ipc.gyp:ipc and added "ipc" to the include_rules
section of DEPS so that checkdeps.py doesn't complain.  Over time projects that
need IPC should depend on the IPC project themselves and dependencies on common
removed, although I don't think many projects that need IPC will be able to get
away without common currently.
- ipc/ipc_message_macros.h still has #include "chrome/common/..." inside of a
ipc/ should not refer to files in chrome/... now.  I'm not sure how to resolve
this since it's really an IDE bug
- the named pipe name (windows+linux) and the logging event name (all) + env
variable (posix) refer explicitly to 'Chrome' which somewhat hurts the illusion
of ipc/ being an independent library.  I think this should be examined in a
subsequent, much smaller patch.
- I've eliminated the IPC.SendMsgCount counter since it was implemented in a way
to create a dependency from ipc/ to chrome/common/chrome_counters. This is the
same approach that r13062 took.

http://codereview.chromium.org/155905

(Patch from James Robinson)


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21342 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 251 insertions, 0 deletions

diff --git a/chrome/common/common_param_traits.h b/chrome/common/common_param_traits.h
new file mode 100644
index 0000000..c34d55f
--- /dev/null
+++ b/chrome/common/common_param_traits.h
@@ -0,0 +1,251 @@
+// 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.
+
+// 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 shared by more than one child process.
+
+#ifndef CHROME_COMMON_COMMON_PARAM_TRAITS_H_
+#define CHROME_COMMON_COMMON_PARAM_TRAITS_H_
+
+#include "base/gfx/native_widget_types.h"
+#include "chrome/common/thumbnail_score.h"
+#include "chrome/common/transport_dib.h"
+#include "ipc/ipc_message_utils.h"
+#include "net/url_request/url_request_status.h"
+#include "webkit/glue/webcursor.h"
+#include "webkit/glue/window_open_disposition.h"
+
+// Forward declarations.
+class GURL;
+class SkBitmap;
+class DictionaryValue;
+class ListValue;
+
+namespace gfx {
+class Point;
+class Rect;
+class Size;
+}  // namespace gfx
+
+namespace webkit_glue {
+struct WebApplicationInfo;
+}  // namespace webkit_glue
+
+namespace IPC {
+
+template <>
+struct ParamTraits<SkBitmap> {
+  typedef SkBitmap param_type;
+  static void Write(Message* m, const param_type& p);
+
+  // Note: This function expects parameter |r| to be of type &SkBitmap since
+  // r->SetConfig() and r->SetPixels() are called.
+  static bool Read(const Message* m, void** iter, param_type* r);
+
+  static void Log(const param_type& p, std::wstring* l);
+};
+
+
+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::wstring* l);
+};
+
+
+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::wstring* 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::wstring* 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::wstring* l);
+};
+
+template <>
+struct ParamTraits<gfx::NativeWindow> {
+  typedef gfx::NativeWindow param_type;
+  static void Write(Message* m, const param_type& p) {
+    m->WriteIntPtr(reinterpret_cast<intptr_t>(p));
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    DCHECK_EQ(sizeof(param_type), sizeof(intptr_t));
+    return m->ReadIntPtr(iter, reinterpret_cast<intptr_t*>(r));
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    l->append(StringPrintf(L"0x%X", p));
+  }
+};
+
+
+template <>
+struct ParamTraits<WindowOpenDisposition> {
+  typedef WindowOpenDisposition param_type;
+  static void Write(Message* m, const param_type& p) {
+    m->WriteInt(p);
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    int temp;
+    bool res = m->ReadInt(iter, &temp);
+    *r = static_cast<WindowOpenDisposition>(temp);
+    return res;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    l->append(StringPrintf(L"%d", p));
+  }
+};
+
+
+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::wstring* l) {
+    l->append(L"<WebCursor>");
+  }
+};
+
+
+template <>
+struct ParamTraits<webkit_glue::WebApplicationInfo> {
+  typedef webkit_glue::WebApplicationInfo 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::wstring* l);
+};
+
+
+#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::wstring* l) {
+    l->append(L"TransportDIB(");
+    LogParam(p.handle, l);
+    l->append(L", ");
+    LogParam(p.sequence_num, l);
+    l->append(L")");
+  }
+};
+#endif
+
+// Traits for URLRequestStatus
+template <>
+struct ParamTraits<URLRequestStatus> {
+  typedef URLRequestStatus param_type;
+  static void Write(Message* m, const param_type& p) {
+    WriteParam(m, static_cast<int>(p.status()));
+    WriteParam(m, p.os_error());
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    int status, os_error;
+    if (!ReadParam(m, iter, &status) ||
+        !ReadParam(m, iter, &os_error))
+      return false;
+    r->set_status(static_cast<URLRequestStatus::Status>(status));
+    r->set_os_error(os_error);
+    return true;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    std::wstring status;
+    switch (p.status()) {
+     case URLRequestStatus::SUCCESS:
+      status = L"SUCCESS";
+      break;
+     case URLRequestStatus::IO_PENDING:
+      status = L"IO_PENDING ";
+      break;
+     case URLRequestStatus::HANDLED_EXTERNALLY:
+      status = L"HANDLED_EXTERNALLY";
+      break;
+     case URLRequestStatus::CANCELED:
+      status = L"CANCELED";
+      break;
+     case URLRequestStatus::FAILED:
+      status = L"FAILED";
+      break;
+     default:
+      status = L"UNKNOWN";
+      break;
+    }
+    if (p.status() == URLRequestStatus::FAILED)
+      l->append(L"(");
+
+    LogParam(status, l);
+
+    if (p.status() == URLRequestStatus::FAILED) {
+      l->append(L", ");
+      LogParam(p.os_error(), l);
+      l->append(L")");
+    }
+  }
+};
+
+template<>
+struct ParamTraits<ThumbnailScore> {
+  typedef ThumbnailScore param_type;
+  static void Write(Message* m, const param_type& p) {
+    IPC::ParamTraits<double>::Write(m, p.boring_score);
+    IPC::ParamTraits<bool>::Write(m, p.good_clipping);
+    IPC::ParamTraits<bool>::Write(m, p.at_top);
+    IPC::ParamTraits<base::Time>::Write(m, p.time_at_snapshot);
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    double boring_score;
+    bool good_clipping, at_top;
+    base::Time time_at_snapshot;
+    if (!IPC::ParamTraits<double>::Read(m, iter, &boring_score) ||
+        !IPC::ParamTraits<bool>::Read(m, iter, &good_clipping) ||
+        !IPC::ParamTraits<bool>::Read(m, iter, &at_top) ||
+        !IPC::ParamTraits<base::Time>::Read(m, iter, &time_at_snapshot))
+      return false;
+
+    r->boring_score = boring_score;
+    r->good_clipping = good_clipping;
+    r->at_top = at_top;
+    r->time_at_snapshot = time_at_snapshot;
+    return true;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    l->append(StringPrintf(L"(%f, %d, %d)",
+                           p.boring_score, p.good_clipping, p.at_top));
+  }
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_COMMON_PARAM_TRAITS_H_