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// Copyright (c) 2006-2008 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 <Windowsx.h>
#include "base/registry.h"
#include "Resource.h"
// This enum needs to be in sync with the strings below.
enum Branch {
UNKNOWN_BRANCH = 0,
DEV_BRANCH,
BETA_BRANCH,
};
// This vector of strings needs to be in sync with the Branch enum above.
static const wchar_t* const kBranchStrings[] = {
L"",
L"1.1-dev",
L"1.1-beta"
};
// This vector of strings needs to be in sync with the Branch enum above.
static const wchar_t* const kBranchStringsReadable[] = {
L"",
L"Dev",
L"Beta"
};
// The root key for Google Update.
static const HKEY kGoogleUpdateRoot = HKEY_CURRENT_USER;
// The Google Update key to read to find out which branch you are on.
static const wchar_t* const kGoogleUpdateKey =
L"Software\\Google\\Update\\ClientState\\"
L"{8A69D345-D564-463C-AFF1-A69D9E530F96}";
// The Google Update value that defines which branch you are on.
static const wchar_t* const kBranchKey = L"ap";
// The suffix Google Update sometimes adds to the channel name (channel names
// are defined in kBranchStrings), indicating that a full install is needed. We
// strip this out (if present) for the purpose of determining which channel you
// are on.
static const wchar_t* const kChannelSuffix = L"-full";
// The icon to use.
static HICON dlg_icon = NULL;
void SetMainLabel(HWND dialog, Branch branch) {
std::wstring main_label = L"You are currently on ";
if (branch == DEV_BRANCH || branch == BETA_BRANCH)
main_label += std::wstring(L"the ") + kBranchStringsReadable[branch] +
std::wstring(L" channel");
else
main_label += L"NO UPDATE CHANNEL";
main_label += L". Choose a different channel and click Update, "
L"or click Close to stay on this channel.";
SetWindowText(GetDlgItem(dialog, IDC_LABEL_MAIN), main_label.c_str());
}
void OnInitDialog(HWND dialog) {
SendMessage(dialog, WM_SETICON, (WPARAM) false, (LPARAM) dlg_icon);
std::wstring branch_string;
RegKey google_update(kGoogleUpdateRoot, kGoogleUpdateKey, KEY_READ);
if (google_update.Valid() &&
!google_update.ReadValue(kBranchKey, &branch_string)) {
// If the 'ap' value is missing, we create it, unless the key is missing.
RegKey write_default(kGoogleUpdateRoot, kGoogleUpdateKey, KEY_WRITE);
branch_string = kBranchStrings[BETA_BRANCH];
if (!write_default.WriteValue(kBranchKey, branch_string.c_str()))
branch_string = L""; // Error, show disabled UI.
}
// We look for '1.1-beta' or '1.1-dev', but Google Update might have added
// '-full' to the channel name, which we need to strip out to determine what
// channel you are on.
std::wstring suffix = kChannelSuffix;
if (branch_string.length() > suffix.length()) {
size_t index = branch_string.rfind(suffix);
if (index != std::wstring::npos &&
index == branch_string.length() - suffix.length()) {
branch_string = branch_string.substr(0, index);
}
}
Branch branch = UNKNOWN_BRANCH;
if (branch_string == kBranchStrings[DEV_BRANCH]) {
branch = DEV_BRANCH;
} else if (branch_string == kBranchStrings[BETA_BRANCH]) {
branch = BETA_BRANCH;
} else {
// Hide the controls we can't use.
EnableWindow(GetDlgItem(dialog, IDOK), false);
EnableWindow(GetDlgItem(dialog, IDC_STABLE), false);
EnableWindow(GetDlgItem(dialog, IDC_CUTTING_EDGE), false);
MessageBox(dialog, L"KEY NOT FOUND\n\nChrome is not installed, or is not "
L"using GoogleUpdate for updates.",
L"Chrome Channel Changer",
MB_ICONEXCLAMATION | MB_OK);
}
SetMainLabel(dialog, branch);
CheckDlgButton(dialog, IDC_STABLE,
branch == BETA_BRANCH ? BST_CHECKED : BST_UNCHECKED);
CheckDlgButton(dialog, IDC_CUTTING_EDGE,
branch == DEV_BRANCH ? BST_CHECKED : BST_UNCHECKED);
}
INT_PTR OnCtlColorStatic(HWND dialog, WPARAM wparam, LPARAM lparam) {
HDC hdc = reinterpret_cast<HDC>(wparam);
HWND control_wnd = reinterpret_cast<HWND>(lparam);
if (GetDlgItem(dialog, IDC_STABLE) == control_wnd ||
GetDlgItem(dialog, IDC_CUTTING_EDGE) == control_wnd ||
GetDlgItem(dialog, IDC_LABEL_MAIN) == control_wnd ||
GetDlgItem(dialog, IDC_SECONDARY_LABEL) == control_wnd) {
SetBkMode(hdc, TRANSPARENT);
SetTextColor(hdc, RGB(0, 0, 0));
return reinterpret_cast<INT_PTR>(GetSysColorBrush(COLOR_WINDOW));
}
return static_cast<INT_PTR>(FALSE);
}
void SaveChanges(HWND dialog) {
Branch branch = UNKNOWN_BRANCH;
if (IsDlgButtonChecked(dialog, IDC_STABLE))
branch = BETA_BRANCH;
else if (IsDlgButtonChecked(dialog, IDC_CUTTING_EDGE))
branch = DEV_BRANCH;
if (branch != UNKNOWN_BRANCH) {
RegKey google_update(kGoogleUpdateRoot, kGoogleUpdateKey, KEY_WRITE);
if (!google_update.WriteValue(kBranchKey, kBranchStrings[branch])) {
MessageBox(dialog, L"Unable to change value, please make sure you\n"
L"have permission to change registry keys under HKLM",
L"Unable to update branch info", MB_OK);
} else {
std::wstring save_msg = L"Your changes have been saved.\nYou are now "
L"on the " +
std::wstring(kBranchStringsReadable[branch]) +
L" branch.";
MessageBox(dialog, save_msg.c_str(), L"Changes were saved", MB_OK);
SetMainLabel(dialog, branch);
}
}
}
INT_PTR CALLBACK DialogWndProc(HWND dialog,
UINT message_id,
WPARAM wparam,
LPARAM lparam) {
UNREFERENCED_PARAMETER(lparam);
switch (message_id) {
case WM_INITDIALOG:
OnInitDialog(dialog);
return static_cast<INT_PTR>(TRUE);
case WM_CTLCOLORSTATIC:
return OnCtlColorStatic(dialog, wparam, lparam);
case WM_COMMAND:
// If the user presses the OK button.
if (LOWORD(wparam) == IDOK) {
SaveChanges(dialog);
return static_cast<INT_PTR>(TRUE);
}
// If the user presses the Cancel button.
if (LOWORD(wparam) == IDCANCEL) {
::EndDialog(dialog, LOWORD(wparam));
return static_cast<INT_PTR>(TRUE);
}
break;
case WM_ERASEBKGND:
PAINTSTRUCT paint;
HDC hdc = BeginPaint(dialog, &paint);
if (!hdc)
return static_cast<INT_PTR>(FALSE); // We didn't handle it.
// Fill the background with White.
HBRUSH brush = GetStockBrush(WHITE_BRUSH);
HGDIOBJ old_brush = SelectObject(hdc, brush);
RECT rc;
GetClientRect(dialog, &rc);
FillRect(hdc, &rc, brush);
// Clean up.
SelectObject(hdc, old_brush);
EndPaint(dialog, &paint);
return static_cast<INT_PTR>(TRUE);
}
return static_cast<INT_PTR>(FALSE);
}
int APIENTRY _tWinMain(HINSTANCE instance,
HINSTANCE previous_instance,
LPTSTR cmd_line,
int cmd_show) {
UNREFERENCED_PARAMETER(previous_instance);
UNREFERENCED_PARAMETER(cmd_line);
UNREFERENCED_PARAMETER(cmd_show);
dlg_icon = ::LoadIcon(instance, MAKEINTRESOURCE(IDI_BRANCH_SWITCHER));
::DialogBox(instance,
MAKEINTRESOURCE(IDD_MAIN_DIALOG),
GetDesktopWindow(),
DialogWndProc);
return TRUE;
}
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