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// 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.
#ifndef CHROME_BROWSER_MESSAGE_WINDOW_H_
#define CHROME_BROWSER_MESSAGE_WINDOW_H_
#include <string>
#include <windows.h>
#include "base/basictypes.h"
#include "base/file_path.h"
// MessageWindow -------------------------------------------------------------
//
// Class for dealing with the invisible global message window for IPC. This
// window allows different browser processes to communicate with each other.
// It is named according to the user data directory, so we can be sure that
// no more than one copy of the application can be running at once with a
// given data directory.
class MessageWindow {
public:
explicit MessageWindow(const FilePath& user_data_dir);
~MessageWindow();
// Returns true if another process was found and notified, false if we
// should continue with this process. Roughly based on Mozilla
//
// TODO(brettw): this will not handle all cases. If two process start up too
// close to each other, the window might not have been created yet for the
// first one, so this function won't find it.
bool NotifyOtherProcess();
// Create the toplevel message window for IPC.
void Create();
// Blocks the dispatch of CopyData messages.
void Lock() {
locked_ = true;
}
// Allows the dispatch of CopyData messages.
void Unlock() {
locked_ = false;
}
// This ugly behemoth handles startup commands sent from another process.
LRESULT OnCopyData(HWND hwnd, const COPYDATASTRUCT* cds);
// Looks for zombie renderer and plugin processes that could have survived.
void HuntForZombieChromeProcesses();
private:
LRESULT CALLBACK WndProc(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam);
static LRESULT CALLBACK WndProcStatic(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
MessageWindow* msg_wnd = reinterpret_cast<MessageWindow*>(
GetWindowLongPtr(hwnd, GWLP_USERDATA));
return msg_wnd->WndProc(hwnd, message, wparam, lparam);
}
HWND remote_window_; // The HWND_MESSAGE of another browser.
HWND window_; // The HWND_MESSAGE window.
bool locked_;
DISALLOW_COPY_AND_ASSIGN(MessageWindow);
};
#endif // #ifndef CHROME_BROWSER_MESSAGE_WINDOW_H_
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