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// 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.
#include "remoting/host/disconnect_window.h"
#include <windows.h>
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "remoting/host/chromoting_host.h"
#include "remoting/host/host_plugin_resource.h"
// HMODULE from DllMain/WinMain. This is needed to find our dialog resource.
// This is defined in:
// Plugin: host_plugin.cc
// SimpleHost: simple_host_process.cc
extern HMODULE g_hModule;
namespace {
class DisconnectWindowWin : public remoting::DisconnectWindow {
public:
DisconnectWindowWin();
virtual void Show(remoting::ChromotingHost* host,
const std::string& username) OVERRIDE;
virtual void Hide() OVERRIDE;
static BOOL CALLBACK DialogProc(HWND hwmd, UINT msg, WPARAM wParam,
LPARAM lParam);
BOOL OnDialogMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
private:
remoting::ChromotingHost* host_;
std::string username_;
HWND hwnd_;
// A "random" key from the tickcount that is used to validate the WM_USER
// message sent to end the dialog. This check is used to help protect
// against someone sending (WM_APP,0,0L) to close the dialog.
DWORD key_;
DISALLOW_COPY_AND_ASSIGN(DisconnectWindowWin);
};
DisconnectWindowWin::DisconnectWindowWin()
: host_(NULL),
username_(""),
hwnd_(NULL),
key_(0L) {
}
BOOL CALLBACK DisconnectWindowWin::DialogProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam) {
DisconnectWindowWin* win = NULL;
if (msg == WM_INITDIALOG) {
win = reinterpret_cast<DisconnectWindowWin*>(lParam);
CHECK(win);
SetWindowLongPtr(hwnd, DWLP_USER, (LONG_PTR)win);
} else {
LONG_PTR lp = GetWindowLongPtr(hwnd, DWLP_USER);
win = reinterpret_cast<DisconnectWindowWin*>(lp);
}
if (win == NULL)
return FALSE;
return win->OnDialogMessage(hwnd, msg, wParam, lParam);
}
BOOL DisconnectWindowWin::OnDialogMessage(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam) {
switch (msg) {
case WM_INITDIALOG:
{
// Update username in dialog.
HWND hwndUsername = GetDlgItem(hwnd, IDC_USERNAME);
CHECK(hwndUsername);
std::wstring w_username = UTF8ToWide(username_);
SetWindowText(hwndUsername, w_username.c_str());
}
return TRUE;
case WM_CLOSE:
// Ignore close messages.
return TRUE;
case WM_DESTROY:
// Ensure we don't try to use the HWND anymore.
hwnd_ = NULL;
return TRUE;
case WM_APP:
if (key_ == static_cast<DWORD>(lParam)) {
EndDialog(hwnd, LOWORD(wParam));
hwnd_ = NULL;
}
return TRUE;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDC_DISCONNECT:
{
CHECK(host_);
host_->Shutdown();
EndDialog(hwnd, LOWORD(wParam));
hwnd_ = NULL;
}
return TRUE;
}
}
return FALSE;
}
void DisconnectWindowWin::Show(remoting::ChromotingHost* host,
const std::string& username) {
host_ = host;
username_ = username;
// Get a "random" value that we can use to prevent someone from sending a
// simple (WM_APP,0,0L) message to our window to close it.
key_ = GetTickCount();
CHECK(!hwnd_);
hwnd_ = CreateDialogParam(g_hModule, MAKEINTRESOURCE(IDD_DISCONNECT), NULL,
(DLGPROC)DialogProc, (LPARAM)this);
if (!hwnd_) {
LOG(ERROR) << "Unable to create Disconnect dialog for remoting.";
return;
}
ShowWindow(hwnd_, SW_SHOW);
// TODO(garykac): Remove this UpdateWindow() call once threading issues are
// resolved and it's no longer needed.
UpdateWindow(hwnd_);
}
void DisconnectWindowWin::Hide() {
if (hwnd_) {
SendMessage(hwnd_, WM_APP, 0, (LPARAM)key_);
}
}
} // namespace
remoting::DisconnectWindow* remoting::DisconnectWindow::Create() {
return new DisconnectWindowWin;
}
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