cef/include/cef_life_span_handler.h

165 lines
7.9 KiB
C++

// 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_LIFE_SPAN_HANDLER_H_
#define CEF_INCLUDE_CEF_LIFE_SPAN_HANDLER_H_
#pragma once
#include "include/cef_base.h"
#include "include/cef_browser.h"
class CefClient;
///
// Implement this interface to handle events related to browser life span. The
// methods of this class will be called on the UI thread unless otherwise
// indicated.
///
/*--cef(source=client)--*/
class CefLifeSpanHandler : public virtual CefBase {
public:
///
// Called on the IO thread before a new popup window is created. The |browser|
// and |frame| parameters represent the source of the popup request. The
// |target_url| and |target_frame_name| values may be empty if none were
// specified with the request. The |popupFeatures| structure contains
// information about the requested popup window. To allow creation of the
// popup window optionally modify |windowInfo|, |client|, |settings| and
// |no_javascript_access| and return false. To cancel creation of the popup
// window return true. The |client| and |settings| values will default to the
// source browser's values. The |no_javascript_access| value indicates whether
// the new browser window should be scriptable and in the same process as the
// source browser.
/*--cef(optional_param=target_url,optional_param=target_frame_name)--*/
virtual bool OnBeforePopup(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const CefString& target_url,
const CefString& target_frame_name,
const CefPopupFeatures& popupFeatures,
CefWindowInfo& windowInfo,
CefRefPtr<CefClient>& client,
CefBrowserSettings& settings,
bool* no_javascript_access) {
return false;
}
///
// Called after a new browser is created.
///
/*--cef()--*/
virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) {}
///
// Called when a modal window is about to display and the modal loop should
// begin running. Return false to use the default modal loop implementation or
// true to use a custom implementation.
///
/*--cef()--*/
virtual bool RunModal(CefRefPtr<CefBrowser> browser) { return false; }
///
// Called when a browser has recieved a request to close. This may result
// directly from a call to CefBrowserHost::CloseBrowser() or indirectly if the
// browser is a top-level OS window created by CEF and the user attempts to
// close the window. This method will be called after the JavaScript
// 'onunload' event has been fired. It will not be called for browsers after
// the associated OS window has been destroyed (for those browsers it is no
// longer possible to cancel the close).
//
// If CEF created an OS window for the browser returning false will send an OS
// close notification to the browser window's top-level owner (e.g. WM_CLOSE
// on Windows, performClose: on OS-X and "delete_event" on Linux). If no OS
// window exists (window rendering disabled) returning false will cause the
// browser object to be destroyed immediately. Return true if the browser is
// parented to another window and that other window needs to receive close
// notification via some non-standard technique.
//
// If an application provides its own top-level window it should handle OS
// close notifications by calling CefBrowserHost::CloseBrowser(false) instead
// of immediately closing (see the example below). This gives CEF an
// opportunity to process the 'onbeforeunload' event and optionally cancel the
// close before DoClose() is called.
//
// The CefLifeSpanHandler::OnBeforeClose() method will be called immediately
// before the browser object is destroyed. The application should only exit
// after OnBeforeClose() has been called for all existing browsers.
//
// If the browser represents a modal window and a custom modal loop
// implementation was provided in CefLifeSpanHandler::RunModal() this callback
// should be used to restore the opener window to a usable state.
//
// By way of example consider what should happen during window close when the
// browser is parented to an application-provided top-level OS window.
// 1. User clicks the window close button which sends an OS close
// notification (e.g. WM_CLOSE on Windows, performClose: on OS-X and
// "delete_event" on Linux).
// 2. Application's top-level window receives the close notification and:
// A. Calls CefBrowserHost::CloseBrowser(false).
// B. Cancels the window close.
// 3. JavaScript 'onbeforeunload' handler executes and shows the close
// confirmation dialog (which can be overridden via
// CefJSDialogHandler::OnBeforeUnloadDialog()).
// 4. User approves the close.
// 5. JavaScript 'onunload' handler executes.
// 6. Application's DoClose() handler is called. Application will:
// A. Set a flag to indicate that the next close attempt will be allowed.
// B. Return false.
// 7. CEF sends an OS close notification.
// 8. Application's top-level window receives the OS close notification and
// allows the window to close based on the flag from #6B.
// 9. Browser OS window is destroyed.
// 10. Application's CefLifeSpanHandler::OnBeforeClose() handler is called and
// the browser object is destroyed.
// 11. Application exits by calling CefQuitMessageLoop() if no other browsers
// exist.
///
/*--cef()--*/
virtual bool DoClose(CefRefPtr<CefBrowser> browser) { return false; }
///
// Called just before a browser is destroyed. Release all references to the
// browser object and do not attempt to execute any methods on the browser
// object after this callback returns. If this is a modal window and a custom
// modal loop implementation was provided in RunModal() this callback should
// be used to exit the custom modal loop. See DoClose() documentation for
// additional usage information.
///
/*--cef()--*/
virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) {}
};
#endif // CEF_INCLUDE_CEF_LIFE_SPAN_HANDLER_H_