// Copyright (c) 2017 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_EXTENSION_HANDLER_H_
#define CEF_INCLUDE_CEF_EXTENSION_HANDLER_H_
#pragma once
#include "include/cef_base.h"
#include "include/cef_browser.h"
#include "include/cef_extension.h"
#include "include/cef_stream.h"
class CefClient;
///
// Callback interface used for asynchronous continuation of
// CefExtensionHandler::GetExtensionResource.
///
/*--cef(source=library)--*/
class CefGetExtensionResourceCallback : public CefBaseRefCounted {
public:
///
// Continue the request. Read the resource contents from |stream|.
///
/*--cef(capi_name=cont,optional_param=stream)--*/
virtual void Continue(CefRefPtr<CefStreamReader> stream) = 0;
///
// Cancel the request.
///
/*--cef()--*/
virtual void Cancel() = 0;
};
///
// Implement this interface to handle events related to browser extensions.
// The methods of this class will be called on the UI thread. See
// CefRequestContext::LoadExtension for information about extension loading.
///
/*--cef(source=client)--*/
class CefExtensionHandler : public virtual CefBaseRefCounted {
public:
///
// Called if the CefRequestContext::LoadExtension request fails. |result| will
// be the error code.
///
/*--cef()--*/
virtual void OnExtensionLoadFailed(cef_errorcode_t result) {}
///
// Called if the CefRequestContext::LoadExtension request succeeds.
// |extension| is the loaded extension.
///
/*--cef()--*/
virtual void OnExtensionLoaded(CefRefPtr<CefExtension> extension) {}
///
// Called after the CefExtension::Unload request has completed.
///
/*--cef()--*/
virtual void OnExtensionUnloaded(CefRefPtr<CefExtension> extension) {}
///
// Called when an extension needs a browser to host a background script
// specified via the "background" manifest key. The browser will have no
// visible window and cannot be displayed. |extension| is the extension that
// is loading the background script. |url| is an internally generated
// reference to an HTML page that will be used to load the background script
// via a <script> src attribute. To allow creation of the browser optionally
// modify |client| and |settings| and return false. To cancel creation of the
// browser (and consequently cancel load of the background script) return
// true. Successful creation will be indicated by a call to
// CefLifeSpanHandler::OnAfterCreated, and CefBrowserHost::IsBackgroundHost
// will return true for the resulting browser. See
// https://developer.chrome.com/extensions/event_pages for more information
// about extension background script usage.
///
/*--cef()--*/
virtual bool OnBeforeBackgroundBrowser(CefRefPtr<CefExtension> extension,
const CefString& url,
CefRefPtr<CefClient>& client,
CefBrowserSettings& settings) {
return false;
}
///
// Called when an extension API (e.g. chrome.tabs.create) requests creation of
// a new browser. |extension| and |browser| are the source of the API call.
// |active_browser| may optionally be specified via the windowId property or
// returned via the GetActiveBrowser() callback and provides the default
// |client| and |settings| values for the new browser. |index| is the position
// value optionally specified via the index property. |url| is the URL that
// will be loaded in the browser. |active| is true if the new browser should
// be active when opened. To allow creation of the browser optionally modify
// |windowInfo|, |client| and |settings| and return false. To cancel creation
// of the browser return true. Successful creation will be indicated by a call
// to CefLifeSpanHandler::OnAfterCreated. Any modifications to |windowInfo|
// will be ignored if |active_browser| is wrapped in a CefBrowserView.
///
/*--cef()--*/
virtual bool OnBeforeBrowser(CefRefPtr<CefExtension> extension,
CefRefPtr<CefBrowser> browser,
CefRefPtr<CefBrowser> active_browser,
int index,
const CefString& url,
bool active,
CefWindowInfo& windowInfo,
CefRefPtr<CefClient>& client,
CefBrowserSettings& settings) {
return false;
}
///
// Called when no tabId is specified to an extension API call that accepts a
// tabId parameter (e.g. chrome.tabs.*). |extension| and |browser| are the
// source of the API call. Return the browser that will be acted on by the API
// call or return NULL to act on |browser|. The returned browser must share
// the same CefRequestContext as |browser|. Incognito browsers should not be
// considered unless the source extension has incognito access enabled, in
// which case |include_incognito| will be true.
///
/*--cef()--*/
virtual CefRefPtr<CefBrowser> GetActiveBrowser(
CefRefPtr<CefExtension> extension,
CefRefPtr<CefBrowser> browser,
bool include_incognito) {
return nullptr;
}
///
// Called when the tabId associated with |target_browser| is specified to an
// extension API call that accepts a tabId parameter (e.g. chrome.tabs.*).
// |extension| and |browser| are the source of the API call. Return true
// to allow access of false to deny access. Access to incognito browsers
// should not be allowed unless the source extension has incognito access
// enabled, in which case |include_incognito| will be true.
///
/*--cef()--*/
virtual bool CanAccessBrowser(CefRefPtr<CefExtension> extension,
CefRefPtr<CefBrowser> browser,
bool include_incognito,
CefRefPtr<CefBrowser> target_browser) {
return true;
}
///
// Called to retrieve an extension resource that would normally be loaded from
// disk (e.g. if a file parameter is specified to chrome.tabs.executeScript).
// |extension| and |browser| are the source of the resource request. |file| is
// the requested relative file path. To handle the resource request return
// true and execute |callback| either synchronously or asynchronously. For the
// default behavior which reads the resource from the extension directory on
// disk return false. Localization substitutions will not be applied to
// resources handled via this method.
///
/*--cef()--*/
virtual bool GetExtensionResource(
CefRefPtr<CefExtension> extension,
CefRefPtr<CefBrowser> browser,
const CefString& file,
CefRefPtr<CefGetExtensionResourceCallback> callback) {
return false;
}
};
#endif // CEF_INCLUDE_CEF_EXTENSION_HANDLER_H_