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// Copyright 2014 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 EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_
#define EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_
#include <map>
#include <set>
#include <string>
#include "base/callback.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/shared_memory.h"
#include "base/scoped_observer.h"
#include "extensions/common/user_script.h"
#include "extensions/renderer/script_injection.h"
#include "extensions/renderer/user_script_set_manager.h"
struct ExtensionMsg_ExecuteCode_Params;
namespace blink {
class WebFrame;
class WebLocalFrame;
}
namespace content {
class RenderView;
}
namespace extensions {
class Extension;
class ExtensionSet;
// The ScriptInjectionManager manages extensions injecting scripts into frames
// via both content/user scripts and tabs.executeScript(). It is responsible for
// maintaining any pending injections awaiting permission or the appropriate
// load point, and injecting them when ready.
class ScriptInjectionManager : public UserScriptSetManager::Observer {
public:
ScriptInjectionManager(const ExtensionSet* extensions,
UserScriptSetManager* user_script_set_manager);
virtual ~ScriptInjectionManager();
// Notifies that a new render view has been created.
void OnRenderViewCreated(content::RenderView* render_view);
// Removes pending injections of the unloaded extension.
void OnExtensionUnloaded(const std::string& extension_id);
// Notifies that an injection has been finished.
void OnInjectionFinished(ScriptInjection* injection);
private:
// A RenderViewObserver implementation which watches the various render views
// in order to notify the ScriptInjectionManager of different document load
// states.
class RVOHelper;
typedef std::map<blink::WebFrame*, UserScript::RunLocation> FrameStatusMap;
// UserScriptSetManager::Observer implementation.
void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
const std::vector<UserScript*>& scripts) override;
// Notifies that an RVOHelper should be removed.
void RemoveObserver(RVOHelper* helper);
// Invalidate any pending tasks associated with |frame|.
void InvalidateForFrame(blink::WebFrame* frame);
// Starts the process to inject appropriate scripts into |frame|.
void StartInjectScripts(blink::WebFrame* frame,
UserScript::RunLocation run_location);
// Actually injects the scripts into |frame|.
void InjectScripts(blink::WebFrame* frame,
UserScript::RunLocation run_location);
// Try to inject and store injection if it has not finished.
void TryToInject(scoped_ptr<ScriptInjection> injection,
UserScript::RunLocation run_location,
ScriptsRunInfo* scripts_run_info);
// Handle the ExecuteCode extension message.
void HandleExecuteCode(const ExtensionMsg_ExecuteCode_Params& params,
content::RenderView* render_view);
// Handle the ExecuteDeclarativeScript extension message.
void HandleExecuteDeclarativeScript(blink::WebFrame* web_frame,
int tab_id,
const ExtensionId& extension_id,
int script_id,
const GURL& url);
// Handle the GrantInjectionPermission extension message.
void HandlePermitScriptInjection(int64 request_id);
// Extensions metadata, owned by Dispatcher (which owns this object).
const ExtensionSet* extensions_;
// The map of active web frames to their corresponding statuses. The
// RunLocation of the frame corresponds to the last location that has ran.
FrameStatusMap frame_statuses_;
// The collection of RVOHelpers.
ScopedVector<RVOHelper> rvo_helpers_;
// The set of UserScripts associated with extensions. Owned by the Dispatcher.
UserScriptSetManager* user_script_set_manager_;
// Pending injections which are waiting for either the proper run location or
// user consent.
ScopedVector<ScriptInjection> pending_injections_;
// Running injections which are waiting for async callbacks from blink.
ScopedVector<ScriptInjection> running_injections_;
ScopedObserver<UserScriptSetManager, UserScriptSetManager::Observer>
user_script_set_manager_observer_;
DISALLOW_COPY_AND_ASSIGN(ScriptInjectionManager);
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_SCRIPT_INJECTION_MANAGER_H_
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