cef/libcef/browser/devtools/devtools_controller.h

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Add support for direct DevTools protocol messaging (fixes issue #2961). This change allows the client to directly send and receive DevTools protocol messages (send method calls, and receive method results and events) without requiring a DevTools front-end or remote-debugging session. This change includes additional supporting changes: - Add a new CefRequestHandler::OnDocumentAvailableInMainFrame callback (see issue #1454). - Add a CefParseJSON variant that accepts a UTF8-encoded buffer. - Add a `--devtools-protocol-log-file=<path>` command-line flag for logging protocol messages sent to/from the DevTools front-end while it is displayed. This is useful for understanding existing DevTools protocol usage. - Add a new "libcef_static_unittests" executable target to support light-weight unit tests of libcef_static internals (e.g. without requiring exposure via the CEF API). Files to be unittested are placed in the new "libcef_static_unittested" source_set which is then included by both the existing libcef_static library and the new unittests executable target. - Linux: Remove use_bundled_fontconfig=false, which is no longer required and causes unittest build errors (see issue #2424). This change also adds a cefclient demo for configuring offline mode using the DevTools protocol (fixes issue #245). This is controlled by the "Offline mode" context menu option and the `--offline` command-line switch which will launch cefclient in offline mode. When cefclient is offline all network requests will fail with ERR_INTERNET_DISCONNECTED and navigator.onLine will return false when called from JavaScript in any frame. This mode is per-browser so newly created browser windows will have the default mode. Note that configuring offline mode in this way will not update the Network tab UI ("Throtting" option) in a displayed DevTools front-end instance.
2020-06-13 02:54:08 +02:00
// Copyright (c) 2020 The Chromium Embedded Framework 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_DEVTOOLS_DEVTOOLS_CONTROLLER_H_
#define CEF_LIBCEF_BROWSER_DEVTOOLS_DEVTOOLS_CONTROLLER_H_
#include <memory>
#include "content/public/browser/devtools_agent_host_client.h"
#include "base/containers/span.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/values.h"
namespace content {
class WebContents;
}
class CefDevToolsController : public content::DevToolsAgentHostClient {
public:
class Observer : public base::CheckedObserver {
public:
// See CefDevToolsMessageObserver documentation.
virtual bool OnDevToolsMessage(const base::StringPiece& message) = 0;
virtual void OnDevToolsMethodResult(int message_id,
bool success,
const base::StringPiece& result) = 0;
virtual void OnDevToolsEvent(const base::StringPiece& method,
const base::StringPiece& params) = 0;
virtual void OnDevToolsAgentAttached() = 0;
virtual void OnDevToolsAgentDetached() = 0;
virtual void OnDevToolsControllerDestroyed() = 0;
protected:
~Observer() override {}
};
// |inspected_contents| will outlive this object.
explicit CefDevToolsController(content::WebContents* inspected_contents);
~CefDevToolsController() override;
// See CefBrowserHost methods of the same name for documentation.
bool SendDevToolsMessage(const base::StringPiece& message);
int ExecuteDevToolsMethod(int message_id,
const std::string& method,
const base::DictionaryValue* params);
// |observer| must outlive this object or be removed.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
base::WeakPtr<CefDevToolsController> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
private:
// content::DevToolsAgentHostClient implementation:
void AgentHostClosed(content::DevToolsAgentHost* agent_host) override;
void DispatchProtocolMessage(content::DevToolsAgentHost* agent_host,
base::span<const uint8_t> message) override;
bool EnsureAgentHost();
content::WebContents* const inspected_contents_;
scoped_refptr<content::DevToolsAgentHost> agent_host_;
int next_message_id_ = 1;
base::ObserverList<Observer> observers_;
base::WeakPtrFactory<CefDevToolsController> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(CefDevToolsController);
};
#endif // CEF_LIBCEF_BROWSER_DEVTOOLS_DEVTOOLS_CONTROLLER_H_