Add support for JavaScript alert, confirm, prompt and onbeforeunload dialogs (issue #507).

- Add CefJSDialogHandler and CefJSDialogCallback interfaces.
- Add default dialog implementations for Windows and Mac OS-X.
- Add "JavaScript Dialogs" example to cefclient.
- Change TestHandler::AddResource to ignore the query component when matching URLs.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@594 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser/javascript_dialog.h

@@ -0,0 +1,66 @@
+// 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.
+
+#ifndef CEF_LIBCEF_BROWSER_JAVASCRIPT_DIALOG_H_
+#define CEF_LIBCEF_BROWSER_JAVASCRIPT_DIALOG_H_
+#pragma once
+
+#include "content/public/browser/javascript_dialogs.h"
+
+#if defined(OS_MACOSX)
+#if __OBJC__
+@class CefJavaScriptDialogHelper;
+#else
+class CefJavaScriptDialogHelper;
+#endif  // __OBJC__
+#endif  // defined(OS_MACOSX)
+
+class CefJavaScriptDialogCreator;
+
+class CefJavaScriptDialog {
+ public:
+  CefJavaScriptDialog(
+      CefJavaScriptDialogCreator* creator,
+      ui::JavascriptMessageType javascript_message_type,
+      const string16& display_url,
+      const string16& message_text,
+      const string16& default_prompt_text,
+      const content::JavaScriptDialogCreator::DialogClosedCallback& callback);
+  ~CefJavaScriptDialog();
+
+  // Called to cancel a dialog mid-flight.
+  void Cancel();
+
+  // Activate the dialog.
+  void Activate();
+
+ private:
+  CefJavaScriptDialogCreator* creator_;
+  content::JavaScriptDialogCreator::DialogClosedCallback callback_;
+
+#if defined(OS_MACOSX)
+  CefJavaScriptDialogHelper* helper_;  // owned
+#elif defined(OS_WIN)
+  ui::JavascriptMessageType message_type_;
+  HWND dialog_win_;
+  HWND parent_win_;
+  string16 message_text_;
+  string16 default_prompt_text_;
+  static INT_PTR CALLBACK DialogProc(HWND dialog, UINT message, WPARAM wparam,
+                                     LPARAM lparam);
+
+  // Since the message loop we expect to run in isn't going to be nicely
+  // calling IsDialogMessage(), we need to hook the wnd proc and call it
+  // ourselves. See http://support.microsoft.com/kb/q187988/
+  static bool InstallMessageHook();
+  static bool UninstallMessageHook();
+  static LRESULT CALLBACK GetMsgProc(int code, WPARAM wparam, LPARAM lparam);
+  static HHOOK msg_hook_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(CefJavaScriptDialog);
+};
+
+#endif  // CEF_LIBCEF_BROWSER_JAVASCRIPT_DIALOG_H_