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https://bitbucket.org/chromiumembedded/cef
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- Factor platform-specific code out of CefBrowserHostImpl (issue #1749).
- Introduce native/ and osr/ folders for native (non-platform-agnostic) and
osr (windowless) code respectively.
- Introduce CefBrowserPlatformDelegate for abstracting platform-specific
implementations of browser host functionality.
- Move dialog and menu code to separate manager and platform-specific runner
implementations exposed via CefBrowserPlatformDelegate.
- Standardize focus-handling behavior between windowed and windowless
implementations. CefFocusHandler::OnSetFocus() will now also be called for
osr focus changes.
- Support multiple simultaneous popups (issue #1289).
This commit is contained in:
Marshall Greenblatt
239
libcef/browser/native/javascript_dialog_runner_win.cc
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239
libcef/browser/native/javascript_dialog_runner_win.cc
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// Copyright (c) 2012 The Chromium Embedded Framework Authors.
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// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/browser/native/javascript_dialog_runner_win.h"
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#include "libcef/browser/browser_host_impl.h"
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#include "libcef_dll/resource.h"
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#include "base/files/file_path.h"
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#include "base/path_service.h"
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#include "base/strings/string_util.h"
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#include "base/strings/utf_string_conversions.h"
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class CefJavaScriptDialogRunnerWin;
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HHOOK CefJavaScriptDialogRunnerWin::msg_hook_ = NULL;
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int CefJavaScriptDialogRunnerWin::msg_hook_user_count_ = 0;
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INT_PTR CALLBACK CefJavaScriptDialogRunnerWin::DialogProc(
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HWND dialog, UINT message, WPARAM wparam, LPARAM lparam) {
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switch (message) {
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case WM_INITDIALOG: {
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SetWindowLongPtr(dialog, DWLP_USER, static_cast<LONG_PTR>(lparam));
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CefJavaScriptDialogRunnerWin* owner =
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reinterpret_cast<CefJavaScriptDialogRunnerWin*>(lparam);
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owner->dialog_win_ = dialog;
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SetDlgItemText(dialog, IDC_DIALOGTEXT, owner->message_text_.c_str());
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if (owner->message_type_ == content::JAVASCRIPT_MESSAGE_TYPE_PROMPT)
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SetDlgItemText(dialog, IDC_PROMPTEDIT,
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owner->default_prompt_text_.c_str());
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break;
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}
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case WM_CLOSE: {
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CefJavaScriptDialogRunnerWin* owner =
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reinterpret_cast<CefJavaScriptDialogRunnerWin*>(
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GetWindowLongPtr(dialog, DWLP_USER));
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if (owner) {
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owner->Cancel();
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owner->callback_.Run(false, base::string16());
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// No need for the system to call DestroyWindow() because it will be
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// called by the Cancel() method.
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return 0;
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}
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break;
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}
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case WM_COMMAND: {
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CefJavaScriptDialogRunnerWin* owner =
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reinterpret_cast<CefJavaScriptDialogRunnerWin*>(
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GetWindowLongPtr(dialog, DWLP_USER));
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base::string16 user_input;
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bool finish = false;
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bool result;
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switch (LOWORD(wparam)) {
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case IDOK:
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finish = true;
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result = true;
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if (owner->message_type_ == content::JAVASCRIPT_MESSAGE_TYPE_PROMPT) {
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size_t length =
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GetWindowTextLength(GetDlgItem(dialog, IDC_PROMPTEDIT)) + 1;
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if (length > 1) {
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GetDlgItemText(dialog, IDC_PROMPTEDIT,
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base::WriteInto(&user_input, length), length);
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}
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}
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break;
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case IDCANCEL:
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finish = true;
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result = false;
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break;
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}
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if (finish) {
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owner->Cancel();
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owner->callback_.Run(result, user_input);
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}
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break;
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}
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default:
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break;
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}
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return 0;
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}
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CefJavaScriptDialogRunnerWin::CefJavaScriptDialogRunnerWin()
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: dialog_win_(NULL),
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parent_win_(NULL),
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hook_installed_(false) {
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}
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CefJavaScriptDialogRunnerWin::~CefJavaScriptDialogRunnerWin() {
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Cancel();
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}
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void CefJavaScriptDialogRunnerWin::Run(
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CefBrowserHostImpl* browser,
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content::JavaScriptMessageType message_type,
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const base::string16& display_url,
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const base::string16& message_text,
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const base::string16& default_prompt_text,
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const DialogClosedCallback& callback) {
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DCHECK(!dialog_win_);
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message_type_ = message_type;
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message_text_ = message_text;
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default_prompt_text_ = default_prompt_text;
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callback_ = callback;
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InstallMessageHook();
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hook_installed_ = true;
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int dialog_type;
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if (message_type == content::JAVASCRIPT_MESSAGE_TYPE_ALERT)
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dialog_type = IDD_ALERT;
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else if (message_type == content::JAVASCRIPT_MESSAGE_TYPE_CONFIRM)
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dialog_type = IDD_CONFIRM;
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else // JAVASCRIPT_MESSAGE_TYPE_PROMPT
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dialog_type = IDD_PROMPT;
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base::FilePath file_path;
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HMODULE hModule = NULL;
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// Try to load the dialog from the DLL.
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if (PathService::Get(base::FILE_MODULE, &file_path))
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hModule = ::GetModuleHandle(file_path.value().c_str());
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if (!hModule)
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hModule = ::GetModuleHandle(NULL);
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DCHECK(hModule);
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parent_win_ = GetAncestor(browser->GetWindowHandle(), GA_ROOT);
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dialog_win_ = CreateDialogParam(hModule,
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MAKEINTRESOURCE(dialog_type),
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parent_win_,
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DialogProc,
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reinterpret_cast<LPARAM>(this));
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DCHECK(dialog_win_);
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if (!display_url.empty()) {
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// Add the display URL to the window title.
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TCHAR text[64];
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GetWindowText(dialog_win_, text, sizeof(text)/sizeof(TCHAR));
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base::string16 new_window_text =
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text + base::ASCIIToUTF16(" - ") + display_url;
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SetWindowText(dialog_win_, new_window_text.c_str());
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}
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// Disable the parent window so the user can't interact with it.
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if (IsWindowEnabled(parent_win_))
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EnableWindow(parent_win_, FALSE);
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ShowWindow(dialog_win_, SW_SHOWNORMAL);
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}
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void CefJavaScriptDialogRunnerWin::Cancel() {
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HWND parent = NULL;
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// Re-enable the parent before closing the popup to avoid focus/activation/
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// z-order issues.
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if (parent_win_ && IsWindow(parent_win_) && !IsWindowEnabled(parent_win_)) {
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parent = parent_win_;
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EnableWindow(parent_win_, TRUE);
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parent_win_ = NULL;
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}
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if (dialog_win_ && IsWindow(dialog_win_)) {
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SetWindowLongPtr(dialog_win_, DWLP_USER, NULL);
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DestroyWindow(dialog_win_);
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dialog_win_ = NULL;
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}
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// Return focus to the parent window.
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if (parent)
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SetFocus(parent);
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if (hook_installed_) {
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UninstallMessageHook();
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hook_installed_ = false;
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}
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}
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// static
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LRESULT CALLBACK CefJavaScriptDialogRunnerWin::GetMsgProc(
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int code, WPARAM wparam, LPARAM lparam) {
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// Mostly borrowed from http://support.microsoft.com/kb/q187988/
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// and http://www.codeproject.com/KB/atl/cdialogmessagehook.aspx.
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LPMSG msg = reinterpret_cast<LPMSG>(lparam);
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if (code >= 0 && wparam == PM_REMOVE &&
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msg->message >= WM_KEYFIRST && msg->message <= WM_KEYLAST) {
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HWND hwnd = GetActiveWindow();
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if (::IsWindow(hwnd) && ::IsDialogMessage(hwnd, msg)) {
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// The value returned from this hookproc is ignored, and it cannot
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// be used to tell Windows the message has been handled. To avoid
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// further processing, convert the message to WM_NULL before
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// returning.
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msg->hwnd = NULL;
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msg->message = WM_NULL;
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msg->lParam = 0L;
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msg->wParam = 0;
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}
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}
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// Passes the hook information to the next hook procedure in
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// the current hook chain.
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return ::CallNextHookEx(msg_hook_, code, wparam, lparam);
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}
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// static
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bool CefJavaScriptDialogRunnerWin::InstallMessageHook() {
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msg_hook_user_count_++;
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// Make sure we only call this once.
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if (msg_hook_ != NULL)
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return true;
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msg_hook_ = ::SetWindowsHookEx(WH_GETMESSAGE,
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&CefJavaScriptDialogRunnerWin::GetMsgProc,
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NULL,
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GetCurrentThreadId());
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DCHECK(msg_hook_ != NULL);
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return msg_hook_ != NULL;
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}
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// static
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bool CefJavaScriptDialogRunnerWin::UninstallMessageHook() {
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msg_hook_user_count_--;
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DCHECK_GE(msg_hook_user_count_, 0);
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if (msg_hook_user_count_ > 0)
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return true;
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DCHECK(msg_hook_ != NULL);
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BOOL result = ::UnhookWindowsHookEx(msg_hook_);
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DCHECK(result);
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msg_hook_ = NULL;
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return result != FALSE;
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}
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