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

include/cef_jsdialog_handler.h

@@ -0,0 +1,122 @@
+// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the name Chromium Embedded
+// Framework nor the names of its contributors may be used to endorse
+// or promote products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// ---------------------------------------------------------------------------
+//
+// The contents of this file must follow a specific format in order to
+// support the CEF translator tool. See the translator.README.txt file in the
+// tools directory for more information.
+//
+
+#ifndef CEF_INCLUDE_CEF_JSDIALOG_HANDLER_H_
+#define CEF_INCLUDE_CEF_JSDIALOG_HANDLER_H_
+#pragma once
+
+#include "include/cef_base.h"
+#include "include/cef_browser.h"
+
+///
+// Callback interface used for asynchronous continuation of JavaScript dialog
+// requests.
+///
+/*--cef(source=library)--*/
+class CefJSDialogCallback : public virtual CefBase {
+ public:
+  ///
+  // Continue the JS dialog request. Set |success| to true if the OK button was
+  // pressed. The |user_input| value should be specified for prompt dialogs.
+  ///
+  /*--cef(capi_name=cont,optional_param=user_input)--*/
+  virtual void Continue(bool success,
+                        const CefString& user_input) =0;
+};
+
+
+///
+// Implement this interface to handle events related to JavaScript dialogs. The
+// methods of this class will be called on the UI thread.
+///
+/*--cef(source=client)--*/
+class CefJSDialogHandler : public virtual CefBase {
+ public:
+  typedef cef_jsdialog_type_t JSDialogType;
+
+  ///
+  // Called to run a JavaScript dialog. The |default_prompt_text| value will be
+  // specified for prompt dialogs only. Set |suppress_message| to true and
+  // return false to suppress the message (suppressing messages is preferable
+  // to immediately executing the callback as this is used to detect presumably
+  // malicious behavior like spamming alert messages in onbeforeunload). Set
+  // |suppress_message| to false and return false to use the default
+  // implementation (the default implementation will show one modal dialog at a
+  // time and suppress any additional dialog requests until the displayed dialog
+  // is dismissed). Return true if the application will use a custom dialog or
+  // if the callback has been executed immediately. Custom dialogs may be either
+  // modal or modeless. If a custom dialog is used the application must execute
+  // |callback| once the custom dialog is dismissed.
+  ///
+  /*--cef(optional_param=accept_lang,optional_param=message_text,
+          optional_param=default_prompt_text)--*/
+  virtual bool OnJSDialog(CefRefPtr<CefBrowser> browser,
+                          const CefString& origin_url,
+                          const CefString& accept_lang,
+                          JSDialogType dialog_type,
+                          const CefString& message_text,
+                          const CefString& default_prompt_text,
+                          CefRefPtr<CefJSDialogCallback> callback,
+                          bool& suppress_message) {
+    return false;
+  }
+
+  ///
+  // Called to run a dialog asking the user if they want to leave a page. Return
+  // false to use the default dialog implementation. Return true if the
+  // application will use a custom dialog or if the callback has been executed
+  // immediately. Custom dialogs may be either modal or modeless. If a custom
+  // dialog is used the application must execute |callback| once the custom
+  // dialog is dismissed.
+  ///
+  /*--cef(optional_param=message_text)--*/
+  virtual bool OnBeforeUnloadDialog(CefRefPtr<CefBrowser> browser,
+                                    const CefString& message_text,
+                                    bool is_reload,
+                                    CefRefPtr<CefJSDialogCallback> callback) {
+    return false;
+  }
+
+  ///
+  // Called to cancel any pending dialogs and reset any saved dialog state. Will
+  // be called due to events like page navigation irregardless of whether any
+  // dialogs are currently pending.
+  ///
+  /*--cef()--*/
+  virtual void OnResetDialogState(CefRefPtr<CefBrowser> browser) {}
+};
+
+#endif  // CEF_INCLUDE_CEF_JSDIALOG_HANDLER_H_