cef/libcef/browser/javascript_dialog_win.cc

228 lines
7.2 KiB
C++

// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2012 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 "libcef/browser/javascript_dialog.h"
#include "libcef/browser/javascript_dialog_manager.h"
#include "libcef/browser/browser_host_impl.h"
#include "libcef_dll/resource.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
class CefJavaScriptDialog;
HHOOK CefJavaScriptDialog::msg_hook_ = NULL;
int CefJavaScriptDialog::msg_hook_user_count_ = 0;
INT_PTR CALLBACK CefJavaScriptDialog::DialogProc(HWND dialog,
UINT message,
WPARAM wparam,
LPARAM lparam) {
switch (message) {
case WM_INITDIALOG: {
SetWindowLongPtr(dialog, DWLP_USER, static_cast<LONG_PTR>(lparam));
CefJavaScriptDialog* owner =
reinterpret_cast<CefJavaScriptDialog*>(lparam);
owner->dialog_win_ = dialog;
SetDlgItemText(dialog, IDC_DIALOGTEXT, owner->message_text_.c_str());
if (owner->message_type_ == content::JAVASCRIPT_MESSAGE_TYPE_PROMPT)
SetDlgItemText(dialog, IDC_PROMPTEDIT,
owner->default_prompt_text_.c_str());
break;
}
case WM_CLOSE: {
CefJavaScriptDialog* owner = reinterpret_cast<CefJavaScriptDialog*>(
GetWindowLongPtr(dialog, DWLP_USER));
if (owner) {
owner->Cancel();
owner->callback_.Run(false, string16());
owner->creator_->DialogClosed(owner);
// No need for the system to call DestroyWindow() because it will be
// called by the Cancel() method.
return 0;
}
break;
}
case WM_COMMAND: {
CefJavaScriptDialog* owner = reinterpret_cast<CefJavaScriptDialog*>(
GetWindowLongPtr(dialog, DWLP_USER));
string16 user_input;
bool finish = false;
bool result;
switch (LOWORD(wparam)) {
case IDOK:
finish = true;
result = true;
if (owner->message_type_ == content::JAVASCRIPT_MESSAGE_TYPE_PROMPT) {
size_t length =
GetWindowTextLength(GetDlgItem(dialog, IDC_PROMPTEDIT)) + 1;
if (length > 1) {
GetDlgItemText(dialog, IDC_PROMPTEDIT,
WriteInto(&user_input, length), length);
}
}
break;
case IDCANCEL:
finish = true;
result = false;
break;
}
if (finish) {
owner->Cancel();
owner->callback_.Run(result, user_input);
owner->creator_->DialogClosed(owner);
}
break;
}
default:
return DefWindowProc(dialog, message, wparam, lparam);
}
return 0;
}
CefJavaScriptDialog::CefJavaScriptDialog(
CefJavaScriptDialogManager* creator,
content::JavaScriptMessageType message_type,
const string16& display_url,
const string16& message_text,
const string16& default_prompt_text,
const content::JavaScriptDialogManager::DialogClosedCallback& callback)
: creator_(creator),
callback_(callback),
message_text_(message_text),
default_prompt_text_(default_prompt_text),
message_type_(message_type) {
InstallMessageHook();
int dialog_type;
if (message_type == content::JAVASCRIPT_MESSAGE_TYPE_ALERT)
dialog_type = IDD_ALERT;
else if (message_type == content::JAVASCRIPT_MESSAGE_TYPE_CONFIRM)
dialog_type = IDD_CONFIRM;
else // JAVASCRIPT_MESSAGE_TYPE_PROMPT
dialog_type = IDD_PROMPT;
base::FilePath file_path;
HMODULE hModule = NULL;
// Try to load the dialog from the DLL.
if (PathService::Get(base::FILE_MODULE, &file_path))
hModule = ::GetModuleHandle(file_path.value().c_str());
if (!hModule)
hModule = ::GetModuleHandle(NULL);
DCHECK(hModule);
parent_win_ = GetAncestor(creator->browser()->GetWindowHandle(), GA_ROOT);
dialog_win_ = CreateDialogParam(hModule,
MAKEINTRESOURCE(dialog_type),
parent_win_,
DialogProc,
reinterpret_cast<LPARAM>(this));
DCHECK(dialog_win_);
if (!display_url.empty()) {
// Add the display URL to the window title.
TCHAR text[64];
GetWindowText(dialog_win_, text, sizeof(text)/sizeof(TCHAR));
string16 new_window_text = text + ASCIIToUTF16(" - ") + display_url;
SetWindowText(dialog_win_, new_window_text.c_str());
}
// Disable the parent window so the user can't interact with it.
if (IsWindowEnabled(parent_win_))
EnableWindow(parent_win_, FALSE);
ShowWindow(dialog_win_, SW_SHOWNORMAL);
}
CefJavaScriptDialog::~CefJavaScriptDialog() {
Cancel();
UninstallMessageHook();
}
void CefJavaScriptDialog::Cancel() {
HWND parent = NULL;
// Re-enable the parent before closing the popup to avoid focus/activation/
// z-order issues.
if (parent_win_ && IsWindow(parent_win_) && !IsWindowEnabled(parent_win_)) {
parent = parent_win_;
EnableWindow(parent_win_, TRUE);
parent_win_ = NULL;
}
if (dialog_win_ && IsWindow(dialog_win_)) {
SetWindowLongPtr(dialog_win_, DWLP_USER, NULL);
DestroyWindow(dialog_win_);
dialog_win_ = NULL;
}
// Return focus to the parent window.
if (parent)
SetFocus(parent);
}
// static
LRESULT CALLBACK CefJavaScriptDialog::GetMsgProc(int code, WPARAM wparam,
LPARAM lparam) {
// Mostly borrowed from http://support.microsoft.com/kb/q187988/
// and http://www.codeproject.com/KB/atl/cdialogmessagehook.aspx.
LPMSG msg = reinterpret_cast<LPMSG>(lparam);
if (code >= 0 && wparam == PM_REMOVE &&
msg->message >= WM_KEYFIRST && msg->message <= WM_KEYLAST) {
HWND hwnd = GetActiveWindow();
if (::IsWindow(hwnd) && ::IsDialogMessage(hwnd, msg)) {
// The value returned from this hookproc is ignored, and it cannot
// be used to tell Windows the message has been handled. To avoid
// further processing, convert the message to WM_NULL before
// returning.
msg->hwnd = NULL;
msg->message = WM_NULL;
msg->lParam = 0L;
msg->wParam = 0;
}
}
// Passes the hook information to the next hook procedure in
// the current hook chain.
return ::CallNextHookEx(msg_hook_, code, wparam, lparam);
}
// static
bool CefJavaScriptDialog::InstallMessageHook() {
msg_hook_user_count_++;
// Make sure we only call this once.
if (msg_hook_ != NULL)
return true;
msg_hook_ = ::SetWindowsHookEx(WH_GETMESSAGE,
&CefJavaScriptDialog::GetMsgProc,
NULL,
GetCurrentThreadId());
DCHECK(msg_hook_ != NULL);
return msg_hook_ != NULL;
}
// static
bool CefJavaScriptDialog::UninstallMessageHook() {
msg_hook_user_count_--;
DCHECK_GE(msg_hook_user_count_, 0);
if (msg_hook_user_count_ > 0)
return true;
DCHECK(msg_hook_ != NULL);
BOOL result = ::UnhookWindowsHookEx(msg_hook_);
DCHECK(result);
msg_hook_ = NULL;
return result != FALSE;
}