Introduce a user scripts mechanism

Allowing programmatic injection of JavaScript to accomplish
all sorts of tasks on the render process side.
This API gives control over the point during the loading phase
at which the script is run, whether it is run on sub-frames or
not, as well as the JavaScript world it is run in (either the
page's main world, or an arbitrary isolated world).

This only has the Widgets API. The Quick API, tests and docs
are coming in separate patches

Change-Id: Ia1c79f68f8dfd4d964281d9723d09062ed7abe46
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>

3 files changed, 131 insertions, 9 deletions

diff --git a/src/core/common/qt_messages.h b/src/core/common/qt_messages.h
index 5ae5fef7d..c692ee5ca 100644
--- a/src/core/common/qt_messages.h
+++ b/src/core/common/qt_messages.h
@@ -3,19 +3,21 @@
 // found in the LICENSE file.
 
 // Multiply-included file, no traditional include guard.
-#include "ipc/ipc_message_macros.h"
-
-// Singly-included section for enums and custom IPC traits.
-#ifndef RENDER_VIEW_MESSAGES_H
-#define RENDER_VIEW_MESSAGES_H
 
-namespace IPC {
+#include "content/public/common/common_param_traits.h"
+#include "ipc/ipc_message_macros.h"
 
-// TODO - add enums and custom IPC traits here when needed.
+#include "user_script_data.h"
 
-}  // namespace IPC
+IPC_STRUCT_TRAITS_BEGIN(UserScriptData)
+    IPC_STRUCT_TRAITS_MEMBER(source)
+    IPC_STRUCT_TRAITS_MEMBER(url)
+    IPC_STRUCT_TRAITS_MEMBER(injectionPoint)
+    IPC_STRUCT_TRAITS_MEMBER(injectForSubframes)
+    IPC_STRUCT_TRAITS_MEMBER(worldId)
+    IPC_STRUCT_TRAITS_MEMBER(scriptId)
+IPC_STRUCT_TRAITS_END()
 
-#endif  // RENDER_VIEW_MESSAGES_H
 
 #define IPC_MESSAGE_START QtMsgStart
 
@@ -31,6 +33,17 @@ IPC_MESSAGE_ROUTED1(QtRenderViewObserver_FetchDocumentInnerText,
 
 IPC_MESSAGE_ROUTED1(WebChannelIPCTransport_Message, std::vector<char> /*binaryJSON*/)
 
+// User scripts messages
+IPC_MESSAGE_ROUTED1(RenderViewObserverHelper_AddScript,
+                    UserScriptData /* script */)
+IPC_MESSAGE_ROUTED1(RenderViewObserverHelper_RemoveScript,
+                    UserScriptData /* script */)
+IPC_MESSAGE_ROUTED0(RenderViewObserverHelper_ClearScripts)
+
+IPC_MESSAGE_CONTROL1(UserScriptController_AddScript, UserScriptData /* scriptContents */)
+IPC_MESSAGE_CONTROL1(UserScriptController_RemoveScript, UserScriptData /* scriptContents */)
+IPC_MESSAGE_CONTROL0(UserScriptController_ClearScripts)
+
 //-----------------------------------------------------------------------------
 // WebContents messages
 // These are messages sent from the renderer back to the browser process.
diff --git a/src/core/common/user_script_data.cpp b/src/core/common/user_script_data.cpp
new file mode 100644
index 000000000..f94ea640c
--- /dev/null
+++ b/src/core/common/user_script_data.cpp
@@ -0,0 +1,46 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "user_script_data.h"
+#include "base/pickle.h"
+
+UserScriptData::UserScriptData() : injectionPoint(AfterLoad)
+  , injectForSubframes(false)
+  , worldId(1)
+{
+    static uint64 idCount = 0;
+    scriptId = idCount++;
+}
diff --git a/src/core/common/user_script_data.h b/src/core/common/user_script_data.h
new file mode 100644
index 000000000..3dfec0ec3
--- /dev/null
+++ b/src/core/common/user_script_data.h
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef USER_SCRIPT_DATA_H
+#define USER_SCRIPT_DATA_H
+
+#include <QtCore/QHash>
+#include <string>
+#include "base/basictypes.h"
+#include "ipc/ipc_message_utils.h"
+#include "url/gurl.h"
+
+struct UserScriptData {
+    enum InjectionPoint {
+        AfterLoad,
+        DocumentLoadFinished,
+        DocumentElementCreation
+    };
+
+    UserScriptData();
+
+    std::string source;
+    GURL url;
+    /*InjectionPoint*/uint8 injectionPoint;
+    bool injectForSubframes;
+    uint worldId;
+    uint64 scriptId;
+};
+
+#endif // USER_SCRIPT_DATA_H